diff options
Diffstat (limited to 'packfile')
57 files changed, 0 insertions, 3467 deletions
diff --git a/packfile/delta/apply/apply.go b/packfile/delta/apply/apply.go deleted file mode 100644 index f5006e3c..00000000 --- a/packfile/delta/apply/apply.go +++ /dev/null @@ -1,160 +0,0 @@ -// Package apply applies Git delta instruction streams. -package apply - -import "fmt" - -// Apply applies one Git delta instruction stream to base. -func Apply(base, delta []byte) ([]byte, error) { - pos := 0 - - srcSize, err := readVarint(delta, &pos) - if err != nil { - return nil, err - } - - dstSize, err := readVarint(delta, &pos) - if err != nil { - return nil, err - } - - if srcSize != len(base) { - return nil, fmt.Errorf("delta/apply: delta source size mismatch: got %d want %d", srcSize, len(base)) - } - - out := make([]byte, dstSize) - outPos := 0 - - for pos < len(delta) { - op := delta[pos] - pos++ - - //nolint:nestif - if op&0x80 != 0 { - off := 0 - - if op&0x01 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy offset") - } - - off |= int(delta[pos]) - pos++ - } - - if op&0x02 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy offset") - } - - off |= int(delta[pos]) << 8 - pos++ - } - - if op&0x04 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy offset") - } - - off |= int(delta[pos]) << 16 - pos++ - } - - if op&0x08 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy offset") - } - - off |= int(delta[pos]) << 24 - pos++ - } - - n := 0 - - if op&0x10 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy size") - } - - n |= int(delta[pos]) - pos++ - } - - if op&0x20 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy size") - } - - n |= int(delta[pos]) << 8 - pos++ - } - - if op&0x40 != 0 { - if pos >= len(delta) { - return nil, fmt.Errorf("delta/apply: malformed delta copy size") - } - - n |= int(delta[pos]) << 16 - pos++ - } - - if n == 0 { - n = 0x10000 - } - - if off < 0 || n < 0 || off+n > len(base) || outPos+n > len(out) { - return nil, fmt.Errorf("delta/apply: delta copy out of bounds") - } - - copy(out[outPos:outPos+n], base[off:off+n]) - outPos += n - - continue - } - - if op == 0 { - return nil, fmt.Errorf("delta/apply: invalid delta opcode 0") - } - - n := int(op) - if pos+n > len(delta) || outPos+n > len(out) { - return nil, fmt.Errorf("delta/apply: delta insert out of bounds") - } - - copy(out[outPos:outPos+n], delta[pos:pos+n]) - outPos += n - pos += n - } - - if outPos != len(out) { - return nil, fmt.Errorf("delta/apply: delta output size mismatch: got %d want %d", outPos, len(out)) - } - - return out, nil -} - -// readVarint parses one Git delta varint and advances pos. -func readVarint(buf []byte, pos *int) (int, error) { - value := 0 - shift := uint(0) - - for { - if *pos >= len(buf) { - return 0, fmt.Errorf("delta/apply: malformed delta varint") - } - - b := buf[*pos] - *pos++ - - value |= int(b&0x7f) << shift - if b&0x80 == 0 { - break - } - - shift += 7 - if shift > 63 { - return 0, fmt.Errorf("delta/apply: delta varint overflow") - } - } - - return value, nil -} diff --git a/packfile/delta/apply/header.go b/packfile/delta/apply/header.go deleted file mode 100644 index 69c9659a..00000000 --- a/packfile/delta/apply/header.go +++ /dev/null @@ -1,47 +0,0 @@ -package apply - -import ( - "fmt" - "io" -) - -// ReadHeaderSizes reads the first two varints in one inflated delta stream. -// -// Callers that continue reading the same stream should pass their own buffered -// byte reader and keep using that same reader afterwards. -func ReadHeaderSizes(reader io.ByteReader) (int, int, error) { - srcSize, err := readVarintFromByteReader(reader) - if err != nil { - return 0, 0, err - } - - dstSize, err := readVarintFromByteReader(reader) - if err != nil { - return 0, 0, err - } - - return srcSize, dstSize, nil -} - -// readVarintFromByteReader parses one Git delta varint from reader. -func readVarintFromByteReader(reader io.ByteReader) (int, error) { - value := 0 - shift := uint(0) - - for { - b, err := reader.ReadByte() - if err != nil { - return 0, fmt.Errorf("delta/apply: malformed delta varint: %w", err) - } - - value |= int(b&0x7f) << shift - if b&0x80 == 0 { - return value, nil - } - - shift += 7 - if shift > 63 { - return 0, fmt.Errorf("delta/apply: delta varint overflow") - } - } -} diff --git a/packfile/delta/doc.go b/packfile/delta/doc.go deleted file mode 100644 index f63c96a8..00000000 --- a/packfile/delta/doc.go +++ /dev/null @@ -1,2 +0,0 @@ -// Package delta provides various routines to handle Git delta compression. -package delta diff --git a/packfile/doc.go b/packfile/doc.go deleted file mode 100644 index d656e256..00000000 --- a/packfile/doc.go +++ /dev/null @@ -1,2 +0,0 @@ -// Package packfile provides Git packfile format parsing primitives. -package packfile diff --git a/packfile/entry.go b/packfile/entry.go deleted file mode 100644 index 0f9c7c8d..00000000 --- a/packfile/entry.go +++ /dev/null @@ -1,76 +0,0 @@ -package packfile - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// Entry is one parsed pack entry prefix, including any delta base reference -// data that appears before the compressed payload. -type Entry struct { - // Type is the pack entry type. - Type objecttype.Type - // Size is the declared resulting object size. - Size int64 - // DataOffset is the byte offset from the start of the entry to the zlib - // payload bytes. - DataOffset int - // RefBaseID is the referenced base object ID bytes for ref-delta entries. - RefBaseID []byte - // OfsBaseDistance is the backward distance for ofs-delta entries. - OfsBaseDistance uint64 -} - -// ParseEntry parses one full pack entry prefix from data. -// -// hashSize must match the hash algorithm size used by the pack/index. -func ParseEntry(data []byte, hashSize int) (Entry, error) { - var zero Entry - - header, err := ParseEntryHeader(data) - if err != nil { - return zero, err - } - - entry := Entry{ - Type: header.Type, - Size: header.Size, - DataOffset: header.HeaderSize, - } - - switch entry.Type { - case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag: - // Base object entries have no extra prefix fields. - case objecttype.TypeRefDelta: - if hashSize <= 0 { - return zero, fmt.Errorf("packfile: invalid hash size %d", hashSize) - } - - end := entry.DataOffset + hashSize - if end > len(data) { - return zero, fmt.Errorf("packfile: truncated ref-delta base id") - } - - entry.RefBaseID = data[entry.DataOffset:end] - entry.DataOffset = end - case objecttype.TypeOfsDelta: - dist, consumed, err := ParseOfsDeltaDistance(data[entry.DataOffset:]) - if err != nil { - return zero, err - } - - entry.OfsBaseDistance = dist - entry.DataOffset += consumed - case objecttype.TypeInvalid, objecttype.TypeFuture: - return zero, fmt.Errorf("packfile: unsupported object type %d", entry.Type) - default: - return zero, fmt.Errorf("packfile: unsupported object type %d", entry.Type) - } - - if entry.DataOffset > len(data) { - return zero, fmt.Errorf("packfile: entry data offset out of bounds") - } - - return entry, nil -} diff --git a/packfile/entry_header.go b/packfile/entry_header.go deleted file mode 100644 index 05664268..00000000 --- a/packfile/entry_header.go +++ /dev/null @@ -1,52 +0,0 @@ -package packfile - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// EntryHeader is one parsed pack entry header prefix. -type EntryHeader struct { - // Type is the entry type tag from the first header byte. - Type objecttype.Type - // Size is the declared resulting object size. - Size int64 - // HeaderSize is the number of bytes consumed by the type/size header. - HeaderSize int -} - -// ParseEntryHeader parses one pack entry type/size header from data. -func ParseEntryHeader(data []byte) (EntryHeader, error) { - var zero EntryHeader - if len(data) == 0 { - return zero, fmt.Errorf("packfile: truncated entry header") - } - - first := data[0] - header := EntryHeader{ - Type: objecttype.Type((first >> 4) & 0x07), - Size: int64(first & 0x0f), - HeaderSize: 1, - } - - shift := uint(4) - - b := first - for b&0x80 != 0 { - if header.HeaderSize >= len(data) { - return zero, fmt.Errorf("packfile: truncated entry header") - } - - b = data[header.HeaderSize] - header.HeaderSize++ - header.Size |= int64(b&0x7f) << shift - shift += 7 - } - - if header.Size < 0 { - return zero, fmt.Errorf("packfile: negative entry size") - } - - return header, nil -} diff --git a/packfile/header.go b/packfile/header.go deleted file mode 100644 index bc859a55..00000000 --- a/packfile/header.go +++ /dev/null @@ -1,9 +0,0 @@ -package packfile - -// Signature is the 4-byte "PACK" magic at the start of pack files. -const Signature = 0x5041434b - -// VersionSupported reports whether one pack version is supported. -func VersionSupported(version uint32) bool { - return version == 2 || version == 3 -} diff --git a/packfile/ingest/api.go b/packfile/ingest/api.go deleted file mode 100644 index ce366a4f..00000000 --- a/packfile/ingest/api.go +++ /dev/null @@ -1,195 +0,0 @@ -package ingest - -import ( - "bufio" - "bytes" - "errors" - "io" - "os" - - objectid "codeberg.org/lindenii/furgit/object/id" - objectstorer "codeberg.org/lindenii/furgit/object/storer" -) - -// Options controls one pack ingest operation. -type Options struct { - // FixThin appends missing local bases for thin packs. - FixThin bool - // WriteRev writes a .rev alongside the .pack and .idx. - WriteRev bool - // Base supplies existing objects for thin-pack fixup. - Base objectstorer.Store - // Progress receives human-readable progress messages. - // - // When nil, no progress output is emitted. - Progress io.Writer - // ProgressFlush flushes transport output after progress writes. - // - // When nil, no explicit flush is attempted. - ProgressFlush func() error - // RequireTrailingEOF requires the source to hit EOF after the pack trailer. - // - // This is suitable for exact pack-file readers, but should be disabled for - // full-duplex transport streams like receive-pack where the peer keeps the - // connection open to read the server response. - RequireTrailingEOF bool -} - -// Result describes one successful ingest transaction. -type Result struct { - // PackName is the destination-relative filename of the written .pack. - PackName string - // IdxName is the destination-relative filename of the written .idx. - IdxName string - // RevName is the destination-relative filename of the written .rev. - // - // RevName is empty when writeRev is false. - RevName string - // PackHash is the final pack hash (same hash embedded in .idx/.rev trailers). - PackHash objectid.ObjectID - // ObjectCount is the final object count in the resulting pack. - // - // If thin fixup appends objects, this includes appended base objects. - ObjectCount uint32 - // ThinFixed reports whether thin fixup appended local bases. - ThinFixed bool -} - -// HeaderInfo describes the parsed PACK header. -type HeaderInfo struct { - Version uint32 - ObjectCount uint32 -} - -// DiscardResult describes one successful Discard call. -type DiscardResult struct { - PackHash objectid.ObjectID - ObjectCount uint32 -} - -// Pending is one started ingest operation awaiting Continue or Discard. -// -// Exactly one of Continue or Discard may be called. -type Pending struct { - reader *bufio.Reader - algo objectid.Algorithm - opts Options - header HeaderInfo - headerRaw [packHeaderSize]byte - - finalized bool -} - -// Ingest reads and validates one PACK header, returning one pending operation. -func Ingest( - src io.Reader, - algo objectid.Algorithm, - opts Options, -) (*Pending, error) { - if algo.Size() == 0 { - return nil, objectid.ErrInvalidAlgorithm - } - - reader := bufio.NewReader(src) - - header, headerRaw, err := readAndValidatePackHeader(reader) - if err != nil { - return nil, err - } - - return &Pending{ - reader: reader, - algo: algo, - opts: opts, - header: header, - headerRaw: headerRaw, - }, nil -} - -// Header returns parsed PACK header info. -func (pending *Pending) Header() HeaderInfo { - return pending.header -} - -// Continue ingests the pack stream into destination and writes pack artifacts. -// -// Continue is terminal. Further use of pending is undefined behavior. -// -// Artifacts are published under content-addressed final names derived from the -// resulting pack hash. If those final names already exist, Continue treats that -// as success and removes its temporary files. -func (pending *Pending) Continue(destination *os.Root) (Result, error) { - pending.finalized = true - - if pending.header.ObjectCount == 0 { - return Result{}, ErrZeroObjectContinue - } - - state, err := newIngestState( - pending.reader, - destination, - pending.algo, - pending.opts, - pending.header, - pending.headerRaw, - ) - if err != nil { - return Result{}, err - } - - return ingest(state) -} - -// Discard consumes and verifies one zero-object pack stream without writing -// files. -// -// Discard is terminal. Further use of pending is undefined behavior. -func (pending *Pending) Discard() (DiscardResult, error) { - pending.finalized = true - - if pending.header.ObjectCount != 0 { - return DiscardResult{}, ErrNonZeroDiscard - } - - hashImpl, err := pending.algo.New() - if err != nil { - return DiscardResult{}, err - } - - _, _ = hashImpl.Write(pending.headerRaw[:]) - - trailer := make([]byte, pending.algo.Size()) - - _, err = io.ReadFull(pending.reader, trailer) - if err != nil { - return DiscardResult{}, &PackTrailerMismatchError{} - } - - computed := hashImpl.Sum(nil) - if !bytes.Equal(computed, trailer) { - return DiscardResult{}, &PackTrailerMismatchError{} - } - - if pending.opts.RequireTrailingEOF { - var probe [1]byte - - n, err := pending.reader.Read(probe[:]) - if n > 0 || err == nil { - return DiscardResult{}, errors.New("packfile/ingest: pack has trailing garbage") - } - - if err != io.EOF { - return DiscardResult{}, err - } - } - - packHash, err := objectid.FromBytes(pending.algo, trailer) - if err != nil { - return DiscardResult{}, err - } - - return DiscardResult{ - PackHash: packHash, - ObjectCount: 0, - }, nil -} diff --git a/packfile/ingest/byteslice_reader.go b/packfile/ingest/byteslice_reader.go deleted file mode 100644 index a1570ef3..00000000 --- a/packfile/ingest/byteslice_reader.go +++ /dev/null @@ -1,21 +0,0 @@ -package ingest - -import "io" - -// byteSliceReader implements io.ByteReader on []byte. -type byteSliceReader struct { - data []byte - pos int -} - -// ReadByte reads one byte from receiver. -func (reader *byteSliceReader) ReadByte() (byte, error) { - if reader.pos >= len(reader.data) { - return 0, io.EOF - } - - b := reader.data[reader.pos] - reader.pos++ - - return b, nil -} diff --git a/packfile/ingest/cache.go b/packfile/ingest/cache.go deleted file mode 100644 index 9a15f55f..00000000 --- a/packfile/ingest/cache.go +++ /dev/null @@ -1,53 +0,0 @@ -package ingest - -import ( - "codeberg.org/lindenii/furgit/internal/lru" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// deltaBaseCacheKey identifies one resolved base by record index. -type deltaBaseCacheKey struct { - recordIdx int -} - -// deltaBaseCacheValue stores one resolved base object payload. -type deltaBaseCacheValue struct { - realType objecttype.Type - content []byte -} - -// deltaBaseCache is a bounded LRU for resolved base payloads. -type deltaBaseCache struct { - lru *lru.Cache[deltaBaseCacheKey, deltaBaseCacheValue] -} - -// newDeltaBaseCache creates one bounded base cache. -func newDeltaBaseCache(maxBytes int64) *deltaBaseCache { - return &deltaBaseCache{ - lru: lru.New( - maxBytes, - func(_ deltaBaseCacheKey, value deltaBaseCacheValue) int64 { - return int64(len(value.content)) - }, - nil, - ), - } -} - -// get returns one cache entry for recordIdx. -func (cache *deltaBaseCache) get(recordIdx int) (objecttype.Type, []byte, bool) { - value, ok := cache.lru.Get(deltaBaseCacheKey{recordIdx: recordIdx}) - if !ok { - return objecttype.TypeInvalid, nil, false - } - - return value.realType, value.content, true -} - -// add stores one cache entry for recordIdx. -func (cache *deltaBaseCache) add(recordIdx int, realType objecttype.Type, content []byte) { - cache.lru.Add(deltaBaseCacheKey{recordIdx: recordIdx}, deltaBaseCacheValue{ - realType: realType, - content: content, - }) -} diff --git a/packfile/ingest/counting_writer.go b/packfile/ingest/counting_writer.go deleted file mode 100644 index 051ad9d1..00000000 --- a/packfile/ingest/counting_writer.go +++ /dev/null @@ -1,17 +0,0 @@ -package ingest - -import "io" - -// countingWriter counts bytes written to dst. -type countingWriter struct { - dst io.Writer - n int -} - -// Write writes src to dst and tracks output byte count. -func (writer *countingWriter) Write(src []byte) (int, error) { - n, err := writer.dst.Write(src) - writer.n += n - - return n, err -} diff --git a/packfile/ingest/crc.go b/packfile/ingest/crc.go deleted file mode 100644 index f55af4ff..00000000 --- a/packfile/ingest/crc.go +++ /dev/null @@ -1,22 +0,0 @@ -package ingest - -import "fmt" - -// beginEntryCRC starts inline CRC accumulation for one packed entry. -func (scanner *streamScanner) beginEntryCRC() { - scanner.entryCRC = 0 - scanner.inEntryCRC = true -} - -// endEntryCRC finishes inline CRC accumulation for one packed entry. -func (scanner *streamScanner) endEntryCRC() (uint32, error) { - if !scanner.inEntryCRC { - return 0, fmt.Errorf("packfile/ingest: entry CRC not started") - } - - crc := scanner.entryCRC - scanner.entryCRC = 0 - scanner.inEntryCRC = false - - return crc, nil -} diff --git a/packfile/ingest/delta_header.go b/packfile/ingest/delta_header.go deleted file mode 100644 index 63fda066..00000000 --- a/packfile/ingest/delta_header.go +++ /dev/null @@ -1,11 +0,0 @@ -package ingest - -import deltaapply "codeberg.org/lindenii/furgit/packfile/delta/apply" - -// finalizeStreamPackHash consumes trailer bytes and verifies stream integrity. -// readDeltaHeaderSizes reads source and destination sizes from one delta payload. -func readDeltaHeaderSizes(payload []byte) (int, int, error) { - reader := &byteSliceReader{data: payload} - - return deltaapply.ReadHeaderSizes(reader) -} diff --git a/packfile/ingest/distance.go b/packfile/ingest/distance.go deleted file mode 100644 index 9bc4d886..00000000 --- a/packfile/ingest/distance.go +++ /dev/null @@ -1,30 +0,0 @@ -package ingest - -import ( - "fmt" - "io" -) - -// readOfsDistanceFromStream reads one ofs-delta encoded distance. -func readOfsDistanceFromStream(reader io.ByteReader) (uint64, int, error) { - first, err := reader.ReadByte() - if err != nil { - return 0, 0, fmt.Errorf("read ofs distance first byte: %w", err) - } - - dist := uint64(first & 0x7f) - consumed := 1 - - b := first - for b&0x80 != 0 { - b, err = reader.ReadByte() - if err != nil { - return 0, 0, fmt.Errorf("read ofs distance continuation: %w", err) - } - - consumed++ - dist = ((dist + 1) << 7) + uint64(b&0x7f) - } - - return dist, consumed, nil -} diff --git a/packfile/ingest/doc.go b/packfile/ingest/doc.go deleted file mode 100644 index 2095068a..00000000 --- a/packfile/ingest/doc.go +++ /dev/null @@ -1,3 +0,0 @@ -// Package ingest implements streaming ingestion of one Git pack stream into a -// destination root, producing .pack/.idx and optionally .rev. -package ingest diff --git a/packfile/ingest/drain.go b/packfile/ingest/drain.go deleted file mode 100644 index 48fb91d9..00000000 --- a/packfile/ingest/drain.go +++ /dev/null @@ -1,68 +0,0 @@ -package ingest - -import ( - "fmt" - "io" - - "codeberg.org/lindenii/furgit/internal/compress/zlib" - objectheader "codeberg.org/lindenii/furgit/object/header" - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" - packfmt "codeberg.org/lindenii/furgit/packfile" -) - -// drainEntryPayload inflates one entry payload from stream and returns -// (inflatedLength, oidForBaseEntry). -func drainEntryPayload(state *ingestState, record objectRecord) (int64, objectid.ObjectID, error) { - var zero objectid.ObjectID - - reader, err := zlib.NewReader(state.stream) - if err != nil { - return 0, zero, &MalformedPackEntryError{Offset: record.offset, Reason: fmt.Sprintf("open zlib stream: %v", err)} - } - - defer func() { _ = reader.Close() }() - - var total int64 - - if packfmt.IsBaseObjectType(record.packedType) { - header, ok := objectheader.Encode(record.packedType, record.declaredSize) - if !ok { - return 0, zero, &MalformedPackEntryError{Offset: record.offset, Reason: "encode object header"} - } - - hashImpl, err := state.algo.New() - if err != nil { - return 0, zero, err - } - - _, _ = hashImpl.Write(header) - - n, err := io.Copy(hashImpl, reader) - if err != nil { - return 0, zero, &MalformedPackEntryError{Offset: record.offset, Reason: fmt.Sprintf("inflate base object: %v", err)} - } - - total = n - - oid, err := objectid.FromBytes(state.algo, hashImpl.Sum(nil)) - if err != nil { - return 0, zero, err - } - - return total, oid, nil - } - - if record.packedType == objecttype.TypeOfsDelta || record.packedType == objecttype.TypeRefDelta { - n, err := io.Copy(io.Discard, reader) - if err != nil { - return 0, zero, &MalformedPackEntryError{Offset: record.offset, Reason: fmt.Sprintf("inflate delta payload: %v", err)} - } - - total = n - - return total, zero, nil - } - - return 0, zero, &MalformedPackEntryError{Offset: record.offset, Reason: "unsupported payload type"} -} diff --git a/packfile/ingest/entry.go b/packfile/ingest/entry.go deleted file mode 100644 index da063e68..00000000 --- a/packfile/ingest/entry.go +++ /dev/null @@ -1,92 +0,0 @@ -package ingest - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" - packfmt "codeberg.org/lindenii/furgit/packfile" -) - -// scanOneEntry scans one pack entry from stream and appends one record. -func scanOneEntry(state *ingestState, startOffset uint64) (uint64, error) { - state.stream.beginEntryCRC() - - record, err := parseEntryPrefix(state, startOffset) - if err != nil { - return 0, err - } - - payloadStartConsumed := state.stream.consumed - - contentLen, oid, err := drainEntryPayload(state, record) - if err != nil { - return 0, err - } - - consumedInput := state.stream.consumed - payloadStartConsumed - - if contentLen != record.declaredSize { - return 0, &MalformedPackEntryError{ - Offset: startOffset, - Reason: fmt.Sprintf("inflated size mismatch got %d want %d", contentLen, record.declaredSize), - } - } - - endOffset := startOffset + uint64(record.headerLen) + consumedInput - if endOffset > state.stream.consumed { - return 0, &MalformedPackEntryError{ - Offset: startOffset, - Reason: fmt.Sprintf("entry end offset overflow got %d > stream %d", endOffset, state.stream.consumed), - } - } - - record.packedLen = endOffset - startOffset - - record.dataOffset = startOffset + uint64(record.headerLen) - if record.packedLen < uint64(record.headerLen) { - return 0, &MalformedPackEntryError{Offset: startOffset, Reason: "negative payload span"} - } - - crc, err := state.stream.endEntryCRC() - if err != nil { - return 0, err - } - - record.crc32 = crc - - if packfmt.IsBaseObjectType(record.packedType) { - record.objectID = oid - record.realType = record.packedType - record.resolved = true - } - - recordIdx := len(state.records) - state.records = append(state.records, record) - - state.offsetToRecord[record.offset] = recordIdx - if record.resolved { - state.objectToRecord[record.objectID] = recordIdx - } - - switch record.packedType { - case objecttype.TypeOfsDelta: - state.ofsDeltas = append(state.ofsDeltas, ofsDeltaRef{ - baseOffset: record.baseOffset, - recordIdx: recordIdx, - }) - case objecttype.TypeRefDelta: - state.refDeltas = append(state.refDeltas, refDeltaRef{ - baseObject: record.baseObject, - recordIdx: recordIdx, - }) - case objecttype.TypeInvalid, - objecttype.TypeCommit, - objecttype.TypeTree, - objecttype.TypeBlob, - objecttype.TypeTag, - objecttype.TypeFuture: - default: - } - - return endOffset, nil -} diff --git a/packfile/ingest/entry_header.go b/packfile/ingest/entry_header.go deleted file mode 100644 index c74fdc16..00000000 --- a/packfile/ingest/entry_header.go +++ /dev/null @@ -1,33 +0,0 @@ -package ingest - -import ( - "codeberg.org/lindenii/furgit/internal/intconv" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// encodePackEntryHeader encodes one non-delta packed entry header. -func encodePackEntryHeader(ty objecttype.Type, size int64) []byte { - var out [16]byte - - n := 0 - - s, err := intconv.Int64ToUint64(size) - if err != nil { - panic(err) - } - - c := (uint8(ty) << 4) | byte(s&0x0f) - - s >>= 4 - for s != 0 { - out[n] = c | 0x80 - n++ - c = byte(s & 0x7f) - s >>= 7 - } - - out[n] = c - n++ - - return append([]byte(nil), out[:n]...) -} diff --git a/packfile/ingest/entry_prefix.go b/packfile/ingest/entry_prefix.go deleted file mode 100644 index a107b4e8..00000000 --- a/packfile/ingest/entry_prefix.go +++ /dev/null @@ -1,95 +0,0 @@ -package ingest - -import ( - "fmt" - - "codeberg.org/lindenii/furgit/internal/intconv" - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// parseEntryPrefix parses one entry prefix from stream. -func parseEntryPrefix(state *ingestState, startOffset uint64) (objectRecord, error) { - var record objectRecord - - record.offset = startOffset - - first, err := state.stream.ReadByte() - if err != nil { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("read first header byte: %v", err)} - } - - record.packedType = objecttype.Type((first >> 4) & 0x07) - size := int64(first & 0x0f) - headerLen := uint32(1) - shift := uint(4) - b := first - - for b&0x80 != 0 { - b, err = state.stream.ReadByte() - if err != nil { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("read size continuation: %v", err)} - } - - headerLen++ - size |= int64(b&0x7f) << shift - shift += 7 - } - - if size < 0 { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: "negative declared size"} - } - - record.declaredSize = size - - switch record.packedType { - case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag: - case objecttype.TypeRefDelta: - baseRaw := make([]byte, state.algo.Size()) - - err := state.stream.readFull(baseRaw) - if err != nil { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("read ref base: %v", err)} - } - - baseID, err := objectid.FromBytes(state.algo, baseRaw) - if err != nil { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("parse ref base: %v", err)} - } - - record.baseObject = baseID - - baseRawLen, err := intconv.IntToUint32(len(baseRaw)) - if err != nil { - return record, err - } - - headerLen += baseRawLen - case objecttype.TypeOfsDelta: - dist, consumed, err := readOfsDistanceFromStream(state.stream) - if err != nil { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: err.Error()} - } - - if startOffset <= dist { - return record, &MalformedPackEntryError{Offset: startOffset, Reason: "ofs base offset out of bounds"} - } - - record.baseOffset = startOffset - dist - - consumedUint32, err := intconv.IntToUint32(consumed) - if err != nil { - return record, err - } - - headerLen += consumedUint32 - case objecttype.TypeInvalid, objecttype.TypeFuture: - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("unsupported object type %d", record.packedType)} - default: - return record, &MalformedPackEntryError{Offset: startOffset, Reason: fmt.Sprintf("unsupported object type %d", record.packedType)} - } - - record.headerLen = headerLen - - return record, nil -} diff --git a/packfile/ingest/errors.go b/packfile/ingest/errors.go deleted file mode 100644 index f6ee9757..00000000 --- a/packfile/ingest/errors.go +++ /dev/null @@ -1,75 +0,0 @@ -package ingest - -import ( - "errors" - "fmt" -) - -// InvalidPackHeaderError reports an invalid or unsupported pack header. -type InvalidPackHeaderError struct { - Reason string -} - -// Error implements error. -func (err *InvalidPackHeaderError) Error() string { - return "packfile/ingest: invalid pack header: " + err.Reason -} - -// PackTrailerMismatchError reports a mismatch between computed and trailer pack hash. -type PackTrailerMismatchError struct{} - -// Error implements error. -func (err *PackTrailerMismatchError) Error() string { - return "packfile/ingest: pack trailer hash mismatch" -} - -// ThinPackUnresolvedError reports unresolved REF deltas when fixThin is disabled -// or when required bases cannot be found in base. -type ThinPackUnresolvedError struct { - Count int -} - -// Error implements error. -func (err *ThinPackUnresolvedError) Error() string { - return fmt.Sprintf("packfile/ingest: unresolved thin deltas: %d", err.Count) -} - -// MalformedPackEntryError reports malformed entry encoding at one pack offset. -type MalformedPackEntryError struct { - Offset uint64 - Reason string -} - -// Error implements error. -func (err *MalformedPackEntryError) Error() string { - return fmt.Sprintf("packfile/ingest: malformed pack entry at offset %d: %s", err.Offset, err.Reason) -} - -// DeltaCycleError reports a detected cycle in delta dependency resolution. -type DeltaCycleError struct { - Offset uint64 -} - -// Error implements error. -func (err *DeltaCycleError) Error() string { - return fmt.Sprintf("packfile/ingest: delta cycle detected at offset %d", err.Offset) -} - -// DestinationWriteError reports destination I/O failures. -type DestinationWriteError struct { - Op string -} - -// Error implements error. -func (err *DestinationWriteError) Error() string { - return "packfile/ingest: destination write failure: " + err.Op -} - -var errExternalThinBase = errors.New("packfile/ingest: external thin base required") - -var ( - // ErrZeroObjectContinue indicates Continue was called for a zero-object pack. - ErrZeroObjectContinue = errors.New("packfile/ingest: cannot continue zero-object pack") - // ErrNonZeroDiscard indicates Discard was called for a non-zero-object pack. - ErrNonZeroDiscard = errors.New("packfile/ingest: cannot discard non-zero pack") -) diff --git a/packfile/ingest/file_section_writer.go b/packfile/ingest/file_section_writer.go deleted file mode 100644 index fa28c1a9..00000000 --- a/packfile/ingest/file_section_writer.go +++ /dev/null @@ -1,22 +0,0 @@ -package ingest - -import "os" - -// fileSectionWriter writes sequentially to file via WriteAt at one base offset. -type fileSectionWriter struct { - file *os.File - off int64 - pos int64 -} - -// Write writes src at current section position. -func (writer *fileSectionWriter) Write(src []byte) (int, error) { - if len(src) == 0 { - return 0, nil - } - - n, err := writer.file.WriteAt(src, writer.off+writer.pos) - writer.pos += int64(n) - - return n, err -} diff --git a/packfile/ingest/fill.go b/packfile/ingest/fill.go deleted file mode 100644 index eca4e4d6..00000000 --- a/packfile/ingest/fill.go +++ /dev/null @@ -1,44 +0,0 @@ -package ingest - -import ( - "errors" - "fmt" - "io" -) - -// fill ensures at least min unread bytes are available in receiver's buffer. -func (scanner *streamScanner) fill(minLen int) error { - if minLen <= 0 { - return nil - } - - if minLen > len(scanner.buf) { - return fmt.Errorf("packfile/ingest: fill(%d) exceeds scanner buffer", minLen) - } - - for scanner.n-scanner.off < minLen { - err := scanner.flushConsumedPrefix() - if err != nil { - return err - } - - readN, err := scanner.src.Read(scanner.buf[scanner.n:]) - if readN > 0 { - scanner.n += readN - } - - if err != nil { - if errors.Is(err, io.EOF) && scanner.n-scanner.off >= minLen { - return nil - } - - return err - } - - if readN == 0 { - return io.ErrNoProgress - } - } - - return nil -} diff --git a/packfile/ingest/finalize.go b/packfile/ingest/finalize.go deleted file mode 100644 index 6fe4edb2..00000000 --- a/packfile/ingest/finalize.go +++ /dev/null @@ -1,94 +0,0 @@ -package ingest - -import ( - "errors" - "fmt" - "io/fs" - "strings" - - "codeberg.org/lindenii/furgit/internal/intconv" -) - -// finalizeArtifacts links temporary files to final names and returns Result. -func finalizeArtifacts(state *ingestState) (Result, error) { - base := "pack-" + state.packHash.String() - packFinal := base + ".pack" - idxFinal := base + ".idx" - - revFinal := "" - if state.opts.WriteRev { - revFinal = base + ".rev" - } - - err := linkTempToFinal(state, state.packTmpName, packFinal) - if err != nil { - return Result{}, err - } - - err = linkTempToFinal(state, state.idxTmpName, idxFinal) - if err != nil { - return Result{}, err - } - - if state.opts.WriteRev { - err := linkTempToFinal(state, state.revTmpName, revFinal) - if err != nil { - return Result{}, err - } - } - - objectCount, err := intconv.IntToUint32(len(state.records)) - if err != nil { - return Result{}, err - } - - return Result{ - PackName: packFinal, - IdxName: idxFinal, - RevName: revFinal, - PackHash: state.packHash, - ObjectCount: objectCount, - ThinFixed: state.thinFixed, - }, nil -} - -// rollbackTemporaryArtifacts removes temporary files after failure. -func rollbackTemporaryArtifacts(state *ingestState) { - if state.packTmpName != "" { - _ = state.destination.Remove(state.packTmpName) - } - - if state.idxTmpName != "" { - _ = state.destination.Remove(state.idxTmpName) - } - - if state.revTmpName != "" { - _ = state.destination.Remove(state.revTmpName) - } -} - -// linkTempToFinal hard-links tmp to final, tolerating existing final paths. -func linkTempToFinal(state *ingestState, tmp, final string) error { - if tmp == "" || final == "" { - return fmt.Errorf("packfile/ingest: invalid finalize names tmp=%q final=%q", tmp, final) - } - - if strings.Contains(final, "/") { - return fmt.Errorf("packfile/ingest: final name must be leaf: %q", final) - } - - err := state.destination.Link(tmp, final) - if err == nil { - _ = state.destination.Remove(tmp) - - return nil - } - - if errors.Is(err, fs.ErrExist) { - _ = state.destination.Remove(tmp) - - return nil - } - - return err -} diff --git a/packfile/ingest/flush.go b/packfile/ingest/flush.go deleted file mode 100644 index 96753170..00000000 --- a/packfile/ingest/flush.go +++ /dev/null @@ -1,37 +0,0 @@ -package ingest - -import "fmt" - -// flush writes all consumed-but-unflushed bytes to destination pack file. -func (scanner *streamScanner) flush() error { - return scanner.flushConsumedPrefix() -} - -// flushConsumedPrefix writes scanner.buf[:scanner.off] and compacts unread -// bytes to the start of buffer. -func (scanner *streamScanner) flushConsumedPrefix() error { - if scanner.off == 0 { - return nil - } - - written := 0 - for written < scanner.off { - n, err := scanner.dstFile.Write(scanner.buf[written:scanner.off]) - if err != nil { - return &DestinationWriteError{Op: fmt.Sprintf("write pack: %v", err)} - } - - if n == 0 { - return &DestinationWriteError{Op: "write pack: short write"} - } - - written += n - } - - unread := scanner.n - scanner.off - copy(scanner.buf[:unread], scanner.buf[scanner.off:scanner.n]) - scanner.off = 0 - scanner.n = unread - - return nil -} diff --git a/packfile/ingest/hash.go b/packfile/ingest/hash.go deleted file mode 100644 index 4b739c20..00000000 --- a/packfile/ingest/hash.go +++ /dev/null @@ -1,27 +0,0 @@ -package ingest - -import ( - "fmt" - - objectheader "codeberg.org/lindenii/furgit/object/header" - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// hashCanonicalObject hashes canonical object bytes (header+content). -func hashCanonicalObject(algo objectid.Algorithm, ty objecttype.Type, content []byte) (objectid.ObjectID, error) { - header, ok := objectheader.Encode(ty, int64(len(content))) - if !ok { - return objectid.ObjectID{}, fmt.Errorf("packfile/ingest: encode object header for type %d", ty) - } - - hashImpl, err := algo.New() - if err != nil { - return objectid.ObjectID{}, err - } - - _, _ = hashImpl.Write(header) - _, _ = hashImpl.Write(content) - - return objectid.FromBytes(algo, hashImpl.Sum(nil)) -} diff --git a/packfile/ingest/header.go b/packfile/ingest/header.go deleted file mode 100644 index c9db0f1b..00000000 --- a/packfile/ingest/header.go +++ /dev/null @@ -1,49 +0,0 @@ -package ingest - -import ( - "encoding/binary" - "fmt" - "io" - - "codeberg.org/lindenii/furgit/packfile" -) - -const packHeaderSize = 12 - -// readAndValidatePackHeader reads one PACK header from src and validates it. -func readAndValidatePackHeader(src io.Reader) (HeaderInfo, [packHeaderSize]byte, error) { - var hdr [packHeaderSize]byte - - _, err := io.ReadFull(src, hdr[:]) - if err != nil { - return HeaderInfo{}, [packHeaderSize]byte{}, &InvalidPackHeaderError{ - Reason: fmt.Sprintf("read header: %v", err), - } - } - - header, err := parseAndValidatePackHeader(hdr) - if err != nil { - return HeaderInfo{}, [packHeaderSize]byte{}, err - } - - return header, hdr, nil -} - -// parseAndValidatePackHeader validates one already-read PACK header. -func parseAndValidatePackHeader(hdr [packHeaderSize]byte) (HeaderInfo, error) { - if binary.BigEndian.Uint32(hdr[:4]) != packfile.Signature { - return HeaderInfo{}, &InvalidPackHeaderError{Reason: "signature mismatch"} - } - - version := binary.BigEndian.Uint32(hdr[4:8]) - if !packfile.VersionSupported(version) { - return HeaderInfo{}, &InvalidPackHeaderError{ - Reason: fmt.Sprintf("unsupported version %d", version), - } - } - - return HeaderInfo{ - Version: version, - ObjectCount: binary.BigEndian.Uint32(hdr[8:12]), - }, nil -} diff --git a/packfile/ingest/idx_write.go b/packfile/ingest/idx_write.go deleted file mode 100644 index 506788b9..00000000 --- a/packfile/ingest/idx_write.go +++ /dev/null @@ -1,266 +0,0 @@ -package ingest - -import ( - "bytes" - "encoding/binary" - "fmt" - "hash" - "io" - "slices" - - "codeberg.org/lindenii/furgit/internal/intconv" - "codeberg.org/lindenii/furgit/internal/progress" -) - -const ( - idxMagicV2 = 0xff744f63 - idxVersionV2 = 2 -) - -// writeIdx writes idx v2 for resolved records. -func writeIdx(state *ingestState) error { - order := buildIdxOrder(state) - - hashImpl, err := state.algo.New() - if err != nil { - return err - } - - write := func(src []byte) error { - _, writeErr := state.idxFile.Write(src) - if writeErr != nil { - return writeErr - } - - _, writeErr = hashImpl.Write(src) - if writeErr != nil { - return writeErr - } - - return nil - } - - var ( - scratch [8]byte - fanout [256]uint32 - ) - - writeProgressf(state, "writing index fanout...\r") - - for _, recordIdx := range order { - idRaw := state.records[recordIdx].objectID.Bytes() - fanout[idRaw[0]]++ - } - - binary.BigEndian.PutUint32(scratch[:4], idxMagicV2) - binary.BigEndian.PutUint32(scratch[4:8], idxVersionV2) - - err = write(scratch[:8]) - if err != nil { - return err - } - - var cumulative uint32 - for i := range fanout { - cumulative += fanout[i] - binary.BigEndian.PutUint32(scratch[:4], cumulative) - - err := write(scratch[:4]) - if err != nil { - return err - } - } - - writeProgressf(state, "writing index fanout: done.\n") - - largeOffsetCount := 0 - - for idx := range state.records { - if state.records[idx].offset >= 0x80000000 { - largeOffsetCount++ - } - } - - oidMeter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "writing index object ids", - Total: uint64(len(order)), - }) - - var oidDone uint64 - - for _, recordIdx := range order { - idRaw := state.records[recordIdx].objectID.Bytes() - - err := write(idRaw) - if err != nil { - return err - } - - oidDone++ - oidMeter.Set(oidDone, 0) - } - - if oidDone > 0 { - oidMeter.Stop("done") - } - - crcMeter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "writing index crc32", - Total: uint64(len(order)), - }) - - var crcDone uint64 - - for _, recordIdx := range order { - binary.BigEndian.PutUint32(scratch[:4], state.records[recordIdx].crc32) - - err := write(scratch[:4]) - if err != nil { - return err - } - - crcDone++ - crcMeter.Set(crcDone, 0) - } - - if crcDone > 0 { - crcMeter.Stop("done") - } - - largeOffsets := make([]uint64, 0) - offsetMeter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "writing index offsets", - Total: uint64(len(order)), - }) - - var offsetDone uint64 - - for _, recordIdx := range order { - offset := state.records[recordIdx].offset - if offset >= 0x80000000 { - largeOffsetIdx, err := intconv.IntToUint32(len(largeOffsets)) - if err != nil { - return err - } - - word := 0x80000000 | largeOffsetIdx - - largeOffsets = append(largeOffsets, offset) - - binary.BigEndian.PutUint32(scratch[:4], word) - } else { - binary.BigEndian.PutUint32(scratch[:4], uint32(offset)) - } - - err := write(scratch[:4]) - if err != nil { - return err - } - - offsetDone++ - offsetMeter.Set(offsetDone, 0) - } - - if offsetDone > 0 { - offsetMeter.Stop("done") - } - - total, err := intconv.IntToUint64(largeOffsetCount) - if err != nil { - return err - } - - largeOffsetMeter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "writing index large offsets", - Total: total, - }) - - var largeOffsetDone uint64 - - for _, off := range largeOffsets { - binary.BigEndian.PutUint64(scratch[:8], off) - - err := write(scratch[:8]) - if err != nil { - return err - } - - largeOffsetDone++ - largeOffsetMeter.Set(largeOffsetDone, 0) - } - - if largeOffsetDone > 0 { - largeOffsetMeter.Stop("done") - } - - writeProgressf(state, "writing index trailer...\r") - - err = write(state.packHash.Bytes()) - if err != nil { - return err - } - - idxHash := hashImpl.Sum(nil) - - _, err = state.idxFile.Write(idxHash) - if err != nil { - return err - } - - err = state.idxFile.Sync() - if err != nil { - return err - } - - writeProgressf(state, "writing index trailer: done.\n") - - return nil -} - -// buildIdxOrder returns record indexes sorted by ObjectID. -func buildIdxOrder(state *ingestState) []int { - out := make([]int, 0, len(state.records)) - for idx := range state.records { - out = append(out, idx) - } - - slices.SortFunc(out, func(a, b int) int { - return bytes.Compare(state.records[a].objectID.Bytes(), state.records[b].objectID.Bytes()) - }) - - return out -} - -// verifyResolvedRecords checks that all records are fully resolved before index writing. -func verifyResolvedRecords(state *ingestState) error { - for idx, record := range state.records { - if !record.resolved { - return fmt.Errorf("packfile/ingest: unresolved record %d at offset %d", idx, record.offset) - } - } - - return nil -} - -// writeAndHash writes src to dst and updates hash. -func writeAndHash(dst io.Writer, hashImpl hash.Hash, src []byte) error { - _, err := dst.Write(src) - if err != nil { - return err - } - - _, err = hashImpl.Write(src) - if err != nil { - return err - } - - return nil -} diff --git a/packfile/ingest/ingest.go b/packfile/ingest/ingest.go deleted file mode 100644 index be65ff5f..00000000 --- a/packfile/ingest/ingest.go +++ /dev/null @@ -1,68 +0,0 @@ -package ingest - -import ( - "fmt" -) - -// ingest initializes transaction state and executes the ingest pipeline. -func ingest(state *ingestState) (out Result, err error) { - err = openTemporaryArtifacts(state) - if err != nil { - return Result{}, err - } - - defer func() { - _ = closeTemporaryArtifacts(state) - if err != nil { - rollbackTemporaryArtifacts(state) - } - }() - - err = streamPackAndScan(state) - if err != nil { - return Result{}, err - } - - err = resolveAll(state) - if err != nil { - return Result{}, err - } - - err = maybeFixThin(state) - if err != nil { - return Result{}, err - } - - if state.thinFixed { - err = resolveAll(state) - if err != nil { - return Result{}, err - } - } - - if len(state.unresolvedRefDeltas) > 0 { - return Result{}, &ThinPackUnresolvedError{Count: len(state.unresolvedRefDeltas)} - } - - err = verifyResolvedRecords(state) - if err != nil { - return Result{}, err - } - - err = state.packFile.Sync() - if err != nil { - return Result{}, &DestinationWriteError{Op: fmt.Sprintf("sync pack: %v", err)} - } - - err = writeIdx(state) - if err != nil { - return Result{}, err - } - - err = writeRev(state) - if err != nil { - return Result{}, err - } - - return finalizeArtifacts(state) -} diff --git a/packfile/ingest/ingest_test.go b/packfile/ingest/ingest_test.go deleted file mode 100644 index 3eb821d3..00000000 --- a/packfile/ingest/ingest_test.go +++ /dev/null @@ -1,434 +0,0 @@ -package ingest_test - -import ( - "bytes" - "encoding/binary" - "errors" - "io" - "io/fs" - "os" - "path/filepath" - "strings" - "testing" - - "codeberg.org/lindenii/furgit/internal/testgit" - objectid "codeberg.org/lindenii/furgit/object/id" - "codeberg.org/lindenii/furgit/packfile/ingest" -) - -type noExtraReadReader struct { - reader *bytes.Reader -} - -func (r *noExtraReadReader) Read(p []byte) (int, error) { - if r.reader.Len() == 0 { - return 0, errors.New("unexpected extra read after pack trailer") - } - - return r.reader.Read(p) -} - -func beginAndContinue( - src io.Reader, - packRoot *os.Root, - algo objectid.Algorithm, - opts ingest.Options, -) (ingest.Result, error) { - pending, err := ingest.Ingest(src, algo, opts) - if err != nil { - return ingest.Result{}, err - } - - return pending.Continue(packRoot) -} - -// fixturePath returns one fixture file path for the selected algorithm. -func fixturePath(t *testing.T, algo objectid.Algorithm, name string) string { - t.Helper() - - dir := algo.String() - if dir == "" { - t.Fatalf("unsupported fixture algorithm: %v", algo) - } - - return filepath.Join("testdata", "fixtures", dir, name) -} - -// fixtureBytes reads one fixture file fully. -func fixtureBytes(t *testing.T, algo objectid.Algorithm, name string) []byte { - t.Helper() - - path := fixturePath(t, algo, name) - dir := filepath.Dir(path) - base := filepath.Base(path) - - root, err := os.OpenRoot(dir) - if err != nil { - t.Fatalf("open fixture root %q: %v", dir, err) - } - - defer func() { - err := root.Close() - if err != nil { - t.Fatalf("close fixture root %q: %v", dir, err) - } - }() - - data, err := root.ReadFile(base) - if err != nil { - t.Fatalf("read fixture %q: %v", base, err) - } - - return data -} - -// fixtureMetadata parses key=value metadata for one algorithm fixture set. -func fixtureMetadata(t *testing.T, algo objectid.Algorithm) map[string]string { - t.Helper() - - data := fixtureBytes(t, algo, "METADATA.txt") - - out := make(map[string]string) - for line := range strings.SplitSeq(strings.TrimSpace(string(data)), "\n") { - line = strings.TrimSpace(line) - if line == "" { - continue - } - - key, value, ok := strings.Cut(line, "=") - if !ok { - t.Fatalf("invalid fixture metadata line %q", line) - } - - out[strings.TrimSpace(key)] = strings.TrimSpace(value) - } - - return out -} - -// fixtureOID returns one fixture metadata object ID value. -func fixtureOID(t *testing.T, algo objectid.Algorithm, key string) objectid.ObjectID { - t.Helper() - - meta := fixtureMetadata(t, algo) - - hex, ok := meta[key] - if !ok { - t.Fatalf("missing fixture metadata key %q", key) - } - - id, err := objectid.ParseHex(algo, hex) - if err != nil { - t.Fatalf("parse fixture metadata oid %q: %v", hex, err) - } - - return id -} - -// verifyReindexOracle regenerates idx/rev with upstream git index-pack and -// compares bytes with files produced by ingest. -func verifyReindexOracle(t *testing.T, repo *testgit.TestRepo, packName, idxName, revName string) { - t.Helper() - - oracleDir := t.TempDir() - oracleIdxPath := filepath.Join(oracleDir, "oracle.idx") - _ = repo.Run(t, "index-pack", "--rev-index", "-o", oracleIdxPath, filepath.Join("objects", "pack", packName)) - oracleRevPath := strings.TrimSuffix(oracleIdxPath, ".idx") + ".rev" - - packRoot := repo.OpenPackRoot(t) - - gotIdx, err := packRoot.ReadFile(idxName) - if err != nil { - t.Fatalf("read idx: %v", err) - } - - oracleRoot, err := os.OpenRoot(oracleDir) - if err != nil { - t.Fatalf("open oracle root: %v", err) - } - - defer func() { - err := oracleRoot.Close() - if err != nil { - t.Fatalf("close oracle root: %v", err) - } - }() - - wantIdx, err := oracleRoot.ReadFile(filepath.Base(oracleIdxPath)) - if err != nil { - t.Fatalf("read oracle idx: %v", err) - } - - if !bytes.Equal(gotIdx, wantIdx) { - t.Fatal("idx bytes differ from git index-pack output") - } - - gotRev, err := packRoot.ReadFile(revName) - if err != nil { - t.Fatalf("read rev: %v", err) - } - - wantRev, err := oracleRoot.ReadFile(filepath.Base(oracleRevPath)) - if err != nil { - t.Fatalf("read oracle rev: %v", err) - } - - if !bytes.Equal(gotRev, wantRev) { - t.Fatal("rev bytes differ from git index-pack output") - } -} - -func TestIngestNonThinPackWritesPackIdxRev(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - head := fixtureOID(t, algo, "head") - packBytes := fixtureBytes(t, algo, "nonthin.pack") - - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - - packRoot := receiver.OpenPackRoot(t) - - result, err := beginAndContinue(bytes.NewReader(packBytes), packRoot, algo, ingest.Options{ - WriteRev: true, - RequireTrailingEOF: true, - }) - if err != nil { - t.Fatalf("Ingest: %v", err) - } - - if result.ThinFixed { - t.Fatalf("ThinFixed = true, want false") - } - - if result.RevName == "" { - t.Fatal("RevName is empty") - } - - _, err = packRoot.Stat(result.PackName) - if err != nil { - t.Fatalf("stat pack: %v", err) - } - - _, err = packRoot.Stat(result.IdxName) - if err != nil { - t.Fatalf("stat idx: %v", err) - } - - _, err = packRoot.Stat(result.RevName) - if err != nil { - t.Fatalf("stat rev: %v", err) - } - - _ = receiver.Run(t, "verify-pack", "-v", filepath.Join("objects", "pack", result.IdxName)) - verifyReindexOracle(t, receiver, result.PackName, result.IdxName, result.RevName) - - receiver.UpdateRef(t, "refs/heads/main", head) - _ = receiver.Run(t, "fsck", "--full", "--strict", "--no-progress", "--no-dangling") - }) -} - -func TestIngestThinPackWithoutFixReturnsUnresolved(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - thinPack := fixtureBytes(t, algo, "thin.pack") - - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - packRoot := receiver.OpenPackRoot(t) - - _, err := beginAndContinue(bytes.NewReader(thinPack), packRoot, algo, ingest.Options{ - WriteRev: true, - RequireTrailingEOF: true, - }) - if err == nil { - t.Fatal("Ingest error = nil, want error") - } - - if _, ok := errors.AsType[*ingest.ThinPackUnresolvedError](err); !ok { - t.Fatalf("Ingest error type = %T (%v), want *ThinPackUnresolvedError", err, err) - } - - entries, err := fs.ReadDir(packRoot.FS(), ".") - if err != nil { - t.Fatalf("ReadDir(pack): %v", err) - } - - for _, entry := range entries { - if strings.HasSuffix(entry.Name(), ".pack") { - t.Fatalf("found finalized pack file after failure: %v", entry.Name()) - } - } - }) -} - -func TestIngestThinPackWithFixThin(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - head := fixtureOID(t, algo, "head") - basePack := fixtureBytes(t, algo, "base.pack") - thinPack := fixtureBytes(t, algo, "thin.pack") - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - - packRoot := receiver.OpenPackRoot(t) - - _, err := beginAndContinue(bytes.NewReader(basePack), packRoot, algo, ingest.Options{ - RequireTrailingEOF: true, - }) - if err != nil { - t.Fatalf("ingest base pack: %v", err) - } - - receiverRepo := receiver.OpenRepository(t) - - result, err := beginAndContinue(bytes.NewReader(thinPack), packRoot, algo, ingest.Options{ - FixThin: true, - WriteRev: true, - Base: receiverRepo.Objects(), - RequireTrailingEOF: true, - }) - if err != nil { - t.Fatalf("Ingest(thin): %v", err) - } - - if !result.ThinFixed { - t.Fatal("ThinFixed = false, want true") - } - - _ = receiver.Run(t, "verify-pack", "-v", filepath.Join("objects", "pack", result.IdxName)) - verifyReindexOracle(t, receiver, result.PackName, result.IdxName, result.RevName) - receiver.UpdateRef(t, "refs/heads/main", head) - _ = receiver.Run(t, "fsck", "--full", "--strict", "--no-progress", "--no-dangling") - }) -} - -func TestIngestPackTrailerMismatch(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - packBytes := fixtureBytes(t, algo, "nonthin.pack") - if len(packBytes) == 0 { - t.Fatal("empty pack stream") - } - - packBytes[len(packBytes)-1] ^= 0xff - - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - packRoot := receiver.OpenPackRoot(t) - - _, err := beginAndContinue(bytes.NewReader(packBytes), packRoot, algo, ingest.Options{ - WriteRev: true, - RequireTrailingEOF: true, - }) - if err == nil { - t.Fatal("Ingest error = nil, want error") - } - - if _, ok := errors.AsType[*ingest.PackTrailerMismatchError](err); !ok { - t.Fatalf("Ingest error type = %T (%v), want *PackTrailerMismatchError", err, err) - } - - entries, err := fs.ReadDir(packRoot.FS(), ".") - if err != nil { - t.Fatalf("ReadDir(pack): %v", err) - } - - for _, entry := range entries { - if strings.HasSuffix(entry.Name(), ".pack") { - t.Fatalf("found finalized pack file after failure: %v", entry.Name()) - } - } - }) -} - -func zeroObjectPackBytes(t *testing.T, algo objectid.Algorithm) []byte { - t.Helper() - - hashImpl, err := algo.New() - if err != nil { - t.Fatalf("algo.New: %v", err) - } - - var header [12]byte - copy(header[:4], []byte{'P', 'A', 'C', 'K'}) - binary.BigEndian.PutUint32(header[4:8], 2) - binary.BigEndian.PutUint32(header[8:12], 0) - - _, _ = hashImpl.Write(header[:]) - - return append(header[:], hashImpl.Sum(nil)...) -} - -func TestIngestDiscardZeroObjectPack(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - packBytes := zeroObjectPackBytes(t, algo) - - pending, err := ingest.Ingest(bytes.NewReader(packBytes), algo, ingest.Options{ - RequireTrailingEOF: true, - }) - if err != nil { - t.Fatalf("Ingest: %v", err) - } - - if pending.Header().ObjectCount != 0 { - t.Fatalf("ObjectCount = %d, want 0", pending.Header().ObjectCount) - } - - discarded, err := pending.Discard() - if err != nil { - t.Fatalf("Discard: %v", err) - } - - if discarded.ObjectCount != 0 { - t.Fatalf("Discard.ObjectCount = %d, want 0", discarded.ObjectCount) - } - }) -} - -func TestIngestContinueRejectsZeroObjectPack(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - packBytes := zeroObjectPackBytes(t, algo) - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - packRoot := receiver.OpenPackRoot(t) - - pending, err := ingest.Ingest(bytes.NewReader(packBytes), algo, ingest.Options{ - RequireTrailingEOF: true, - }) - if err != nil { - t.Fatalf("Ingest: %v", err) - } - - _, err = pending.Continue(packRoot) - if !errors.Is(err, ingest.ErrZeroObjectContinue) { - t.Fatalf("Continue error = %v, want ErrZeroObjectContinue", err) - } - }) -} - -func TestIngestCanFinishWithoutTrailingEOF(t *testing.T) { - t.Parallel() - - testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper - head := fixtureOID(t, algo, "head") - packBytes := fixtureBytes(t, algo, "nonthin.pack") - - receiver := testgit.NewRepo(t, testgit.RepoOptions{ObjectFormat: algo, Bare: true}) - packRoot := receiver.OpenPackRoot(t) - - result, err := beginAndContinue(&noExtraReadReader{reader: bytes.NewReader(packBytes)}, packRoot, algo, ingest.Options{ - WriteRev: true, - }) - if err != nil { - t.Fatalf("Ingest without trailing EOF: %v", err) - } - - receiver.UpdateRef(t, "refs/heads/main", head) - _ = receiver.Run(t, "verify-pack", "-v", filepath.Join("objects", "pack", result.IdxName)) - _ = receiver.Run(t, "fsck", "--full", "--strict", "--no-progress", "--no-dangling") - }) -} diff --git a/packfile/ingest/progress_write.go b/packfile/ingest/progress_write.go deleted file mode 100644 index 5b9f184b..00000000 --- a/packfile/ingest/progress_write.go +++ /dev/null @@ -1,11 +0,0 @@ -package ingest - -import "codeberg.org/lindenii/furgit/internal/utils" - -func writeProgressf(state *ingestState, format string, args ...any) { - utils.BestEffortFprintf(state.opts.Progress, format, args...) - - if state.opts.ProgressFlush != nil { - _ = state.opts.ProgressFlush() - } -} diff --git a/packfile/ingest/record_content.go b/packfile/ingest/record_content.go deleted file mode 100644 index 4109bc01..00000000 --- a/packfile/ingest/record_content.go +++ /dev/null @@ -1,30 +0,0 @@ -package ingest - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" - packfmt "codeberg.org/lindenii/furgit/packfile" -) - -// readBaseRecordContent reads canonical base content for one non-delta record. -func readBaseRecordContent(state *ingestState, idx int) (objecttype.Type, []byte, error) { - record := state.records[idx] - if !packfmt.IsBaseObjectType(record.packedType) { - return objecttype.TypeInvalid, nil, fmt.Errorf("packfile/ingest: record %d is not a base object", idx) - } - - content, err := inflateRecordPayload(state, idx) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - if int64(len(content)) != record.declaredSize { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("base content size mismatch got %d want %d", len(content), record.declaredSize), - } - } - - return record.packedType, content, nil -} diff --git a/packfile/ingest/record_delta.go b/packfile/ingest/record_delta.go deleted file mode 100644 index 69cb8524..00000000 --- a/packfile/ingest/record_delta.go +++ /dev/null @@ -1,60 +0,0 @@ -package ingest - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" - deltaapply "codeberg.org/lindenii/furgit/packfile/delta/apply" -) - -// applyDeltaRecord applies one delta record onto base content. -func applyDeltaRecord(state *ingestState, idx int, baseType objecttype.Type, baseContent []byte) (objecttype.Type, []byte, error) { - record := state.records[idx] - if record.packedType != objecttype.TypeOfsDelta && record.packedType != objecttype.TypeRefDelta { - return objecttype.TypeInvalid, nil, fmt.Errorf("packfile/ingest: record %d is not a delta record", idx) - } - - deltaPayload, err := inflateRecordPayload(state, idx) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - if int64(len(deltaPayload)) != record.declaredSize { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("delta payload size mismatch got %d want %d", len(deltaPayload), record.declaredSize), - } - } - - srcSize, dstSize, err := readDeltaHeaderSizes(deltaPayload) - if err != nil { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("read delta header: %v", err), - } - } - - if srcSize != len(baseContent) { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("delta source size mismatch got %d want %d", srcSize, len(baseContent)), - } - } - - content, err := deltaapply.Apply(baseContent, deltaPayload) - if err != nil { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("apply delta: %v", err), - } - } - - if len(content) != dstSize { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: fmt.Sprintf("delta result size mismatch got %d want %d", len(content), dstSize), - } - } - - return baseType, content, nil -} diff --git a/packfile/ingest/record_inflate.go b/packfile/ingest/record_inflate.go deleted file mode 100644 index b8eca25b..00000000 --- a/packfile/ingest/record_inflate.go +++ /dev/null @@ -1,46 +0,0 @@ -package ingest - -import ( - "compress/zlib" - "fmt" - "io" - - "codeberg.org/lindenii/furgit/internal/intconv" -) - -// inflateRecordPayload inflates one record's zlib payload from pack file. -func inflateRecordPayload(state *ingestState, idx int) ([]byte, error) { - record := state.records[idx] - if record.packedLen < uint64(record.headerLen) { - return nil, &MalformedPackEntryError{Offset: record.offset, Reason: "entry packed span underflow"} - } - - compressedOffset := record.offset + uint64(record.headerLen) - compressedLen := record.packedLen - uint64(record.headerLen) - - compressedOffsetInt64, err := intconv.Uint64ToInt64(compressedOffset) - if err != nil { - return nil, err - } - - compressedLenInt64, err := intconv.Uint64ToInt64(compressedLen) - if err != nil { - return nil, err - } - - section := io.NewSectionReader(state.packFile, compressedOffsetInt64, compressedLenInt64) - - reader, err := zlib.NewReader(section) - if err != nil { - return nil, &MalformedPackEntryError{Offset: record.offset, Reason: fmt.Sprintf("open payload zlib: %v", err)} - } - - defer func() { _ = reader.Close() }() - - out, err := io.ReadAll(reader) - if err != nil { - return nil, &MalformedPackEntryError{Offset: record.offset, Reason: fmt.Sprintf("inflate payload: %v", err)} - } - - return out, nil -} diff --git a/packfile/ingest/record_resolve.go b/packfile/ingest/record_resolve.go deleted file mode 100644 index 5bff18ab..00000000 --- a/packfile/ingest/record_resolve.go +++ /dev/null @@ -1,117 +0,0 @@ -package ingest - -import ( - "fmt" - - objecttype "codeberg.org/lindenii/furgit/object/type" - packfmt "codeberg.org/lindenii/furgit/packfile" -) - -// resolveRecord resolves one record and returns canonical type/content. -func resolveRecord(state *ingestState, idx int, visiting map[int]struct{}) (objecttype.Type, []byte, error) { - if idx < 0 || idx >= len(state.records) { - return objecttype.TypeInvalid, nil, fmt.Errorf("packfile/ingest: record index out of bounds") - } - - if _, ok := visiting[idx]; ok { - return objecttype.TypeInvalid, nil, &DeltaCycleError{Offset: state.records[idx].offset} - } - - visiting[idx] = struct{}{} - defer delete(visiting, idx) - - record := &state.records[idx] - if ty, content, ok := state.baseCache.get(idx); ok { - return ty, content, nil - } - - if packfmt.IsBaseObjectType(record.packedType) { - ty, content, err := readBaseRecordContent(state, idx) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - if record.resolved { - state.baseCache.add(idx, record.realType, content) - - return record.realType, content, nil - } - - id, err := hashCanonicalObject(state.algo, ty, content) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - record.objectID = id - record.realType = ty - record.resolved = true - state.objectToRecord[id] = idx - state.baseCache.add(idx, ty, content) - - return ty, content, nil - } - - var ( - baseType objecttype.Type - baseContent []byte - err error - ) - switch record.packedType { - case objecttype.TypeOfsDelta: - baseIdx, ok := state.offsetToRecord[record.baseOffset] - if !ok { - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: "missing ofs-delta base entry", - } - } - - baseType, baseContent, err = resolveRecord(state, baseIdx, visiting) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - case objecttype.TypeRefDelta: - baseIdx, ok := state.objectToRecord[record.baseObject] - if ok { - baseType, baseContent, err = resolveRecord(state, baseIdx, visiting) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - } else { - return objecttype.TypeInvalid, nil, errExternalThinBase - } - case objecttype.TypeInvalid, - objecttype.TypeCommit, - objecttype.TypeTree, - objecttype.TypeBlob, - objecttype.TypeTag, - objecttype.TypeFuture: - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: "unsupported delta type", - } - default: - return objecttype.TypeInvalid, nil, &MalformedPackEntryError{ - Offset: record.offset, - Reason: "unsupported delta type", - } - } - - ty, content, err := applyDeltaRecord(state, idx, baseType, baseContent) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - id, err := hashCanonicalObject(state.algo, ty, content) - if err != nil { - return objecttype.TypeInvalid, nil, err - } - - record.objectID = id - record.realType = ty - record.resolved = true - state.objectToRecord[id] = idx - state.baseCache.add(idx, ty, content) - - return ty, content, nil -} diff --git a/packfile/ingest/records.go b/packfile/ingest/records.go deleted file mode 100644 index 75f157fa..00000000 --- a/packfile/ingest/records.go +++ /dev/null @@ -1,46 +0,0 @@ -package ingest - -import ( - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// objectRecord stores metadata for one packed object entry. -type objectRecord struct { - // offset is the entry start offset in the pack file. - offset uint64 - // headerLen is packed entry header length in bytes. - headerLen uint32 - // packedLen is total packed entry length in bytes. - packedLen uint64 - // crc32 is the CRC over the full packed entry. - crc32 uint32 - // packedType is the entry type tag from the pack stream. - packedType objecttype.Type - // realType is canonical object type after delta resolution. - realType objecttype.Type - // declaredSize is the declared output object size for this entry. - declaredSize int64 - // dataOffset is compressed payload start offset for this entry. - dataOffset uint64 - // baseOffset is OFS base offset when packedType is OFS delta. - baseOffset uint64 - // baseObject is REF base object ID when packedType is REF delta. - baseObject objectid.ObjectID - // objectID is final resolved object ID. - objectID objectid.ObjectID - // resolved reports whether objectID/realType are finalized. - resolved bool -} - -// ofsDeltaRef maps one OFS delta record to its base offset. -type ofsDeltaRef struct { - baseOffset uint64 - recordIdx int -} - -// refDeltaRef maps one REF delta record to its base object ID. -type refDeltaRef struct { - baseObject objectid.ObjectID - recordIdx int -} diff --git a/packfile/ingest/resolve_all.go b/packfile/ingest/resolve_all.go deleted file mode 100644 index e0ad2281..00000000 --- a/packfile/ingest/resolve_all.go +++ /dev/null @@ -1,71 +0,0 @@ -package ingest - -import ( - "errors" - - "codeberg.org/lindenii/furgit/internal/progress" -) - -// resolveAll resolves all delta records and finalizes ObjectID/RealType for every record. -func resolveAll(state *ingestState) error { - state.unresolvedRefDeltas = state.unresolvedRefDeltas[:0] - - var pending uint32 - - for idx := range state.records { - if !state.records[idx].resolved { - pending++ - } - } - - if pending == 0 { - return nil - } - - var done uint32 - - meter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "resolving deltas", - Total: uint64(pending), - }) - - for idx := range state.records { - if state.records[idx].resolved { - continue - } - - done++ - meter.Set(uint64(done), 0) - - visiting := make(map[int]struct{}) - - ty, content, err := resolveRecord(state, idx, visiting) - if err != nil { - if errors.Is(err, errExternalThinBase) { - state.unresolvedRefDeltas = append(state.unresolvedRefDeltas, idx) - - continue - } - - return err - } - - id, err := hashCanonicalObject(state.algo, ty, content) - if err != nil { - return err - } - - record := &state.records[idx] - record.realType = ty - record.objectID = id - record.resolved = true - state.objectToRecord[id] = idx - state.baseCache.add(idx, ty, content) - } - - meter.Stop("done") - - return nil -} diff --git a/packfile/ingest/rev_write.go b/packfile/ingest/rev_write.go deleted file mode 100644 index f8c30c1b..00000000 --- a/packfile/ingest/rev_write.go +++ /dev/null @@ -1,138 +0,0 @@ -package ingest - -import ( - "encoding/binary" - "slices" - - "codeberg.org/lindenii/furgit/internal/intconv" - "codeberg.org/lindenii/furgit/internal/progress" -) - -const ( - revMagic = 0x52494458 - revVersion = 1 -) - -// writeRev writes rev index for resolved records. -func writeRev(state *ingestState) error { - if !state.opts.WriteRev { - return nil - } - - idxOrder := buildIdxOrder(state) - - recordToIdxPos := make([]int, len(state.records)) - for pos, recordIdx := range idxOrder { - recordToIdxPos[recordIdx] = pos - } - - packOrder := buildPackOrder(state) - - hashImpl, err := state.algo.New() - if err != nil { - return err - } - - var scratch [8]byte - - writeProgressf(state, "writing reverse index header...\r") - binary.BigEndian.PutUint32(scratch[:4], revMagic) - - err = writeAndHash(state.revFile, hashImpl, scratch[:4]) - if err != nil { - return err - } - - binary.BigEndian.PutUint32(scratch[:4], revVersion) - - err = writeAndHash(state.revFile, hashImpl, scratch[:4]) - if err != nil { - return err - } - - binary.BigEndian.PutUint32(scratch[:4], state.algo.PackHashID()) - - err = writeAndHash(state.revFile, hashImpl, scratch[:4]) - if err != nil { - return err - } - - writeProgressf(state, "writing reverse index header: done.\n") - - entriesMeter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "writing reverse index entries", - Total: uint64(len(packOrder)), - }) - - var entriesDone uint64 - - for _, recordIdx := range packOrder { - recordPos, err := intconv.IntToUint32(recordToIdxPos[recordIdx]) - if err != nil { - return err - } - - binary.BigEndian.PutUint32(scratch[:4], recordPos) - - err = writeAndHash(state.revFile, hashImpl, scratch[:4]) - if err != nil { - return err - } - - entriesDone++ - entriesMeter.Set(entriesDone, 0) - } - - if entriesDone > 0 { - entriesMeter.Stop("done") - } - - writeProgressf(state, "writing reverse index trailer...\r") - - err = writeAndHash(state.revFile, hashImpl, state.packHash.Bytes()) - if err != nil { - return err - } - - revHash := hashImpl.Sum(nil) - - _, err = state.revFile.Write(revHash) - if err != nil { - return err - } - - err = state.revFile.Sync() - if err != nil { - return err - } - - writeProgressf(state, "writing reverse index trailer: done.\n") - - return nil -} - -// buildPackOrder returns record indexes sorted by pack offset. -func buildPackOrder(state *ingestState) []int { - out := make([]int, 0, len(state.records)) - for idx := range state.records { - out = append(out, idx) - } - - slices.SortFunc(out, func(a, b int) int { - offA := state.records[a].offset - - offB := state.records[b].offset - switch { - case offA < offB: - return -1 - case offA > offB: - return 1 - default: - return 0 - } - }) - - return out -} diff --git a/packfile/ingest/rewrite_header_trailer.go b/packfile/ingest/rewrite_header_trailer.go deleted file mode 100644 index f1f18a39..00000000 --- a/packfile/ingest/rewrite_header_trailer.go +++ /dev/null @@ -1,89 +0,0 @@ -package ingest - -import ( - "encoding/binary" - "io" - - "codeberg.org/lindenii/furgit/internal/intconv" - objectid "codeberg.org/lindenii/furgit/object/id" -) - -// rewritePackHeaderAndTrailer rewrites object count and trailer hash using ReadAt/WriteAt. -func rewritePackHeaderAndTrailer(state *ingestState) error { - var countRaw [4]byte - - recordCountUint32, err := intconv.IntToUint32(len(state.records)) - if err != nil { - return err - } - - binary.BigEndian.PutUint32(countRaw[:], recordCountUint32) - - _, err = state.packFile.WriteAt(countRaw[:], 8) - if err != nil { - return err - } - - info, err := state.packFile.Stat() - if err != nil { - return err - } - - endWithoutTrailer := info.Size() - - hashImpl, err := state.algo.New() - if err != nil { - return err - } - - var ( - buf [128 << 10]byte - pos int64 - ) - for pos < endWithoutTrailer { - want := int64(len(buf)) - - remaining := endWithoutTrailer - pos - if remaining < want { - want = remaining - } - - n, err := state.packFile.ReadAt(buf[:want], pos) - if err != nil && err != io.EOF { - return err - } - - if n == 0 { - return io.ErrUnexpectedEOF - } - - _, _ = hashImpl.Write(buf[:n]) - pos += int64(n) - } - - sum := hashImpl.Sum(nil) - - _, err = state.packFile.WriteAt(sum, endWithoutTrailer) - if err != nil { - return err - } - - packHash, err := objectid.FromBytes(state.algo, sum) - if err != nil { - return err - } - - state.packHash = packHash - state.objectCountHeader = recordCountUint32 - - sumLenInt64 := int64(len(sum)) - - newConsumed, err := intconv.Int64ToUint64(endWithoutTrailer + sumLenInt64) - if err != nil { - return err - } - - state.stream.consumed = newConsumed - - return nil -} diff --git a/packfile/ingest/scan.go b/packfile/ingest/scan.go deleted file mode 100644 index de4e993c..00000000 --- a/packfile/ingest/scan.go +++ /dev/null @@ -1,106 +0,0 @@ -package ingest - -import ( - "fmt" - - "codeberg.org/lindenii/furgit/internal/progress" - objectid "codeberg.org/lindenii/furgit/object/id" -) - -// streamPackAndScan copies src into temp .pack while scanning packed entries. -func streamPackAndScan(state *ingestState) error { - hashImpl, err := state.algo.New() - if err != nil { - return err - } - - state.stream = newStreamScanner( - state.src, - state.packFile, - hashImpl, - state.algo.Size(), - ) - - writeProgressf(state, "validating pack header...\r") - - err = seedStreamWithPackHeader(state) - if err != nil { - return err - } - - writeProgressf(state, "validating pack header: done.\n") - - state.records = make([]objectRecord, 0, state.objectCountHeader) - state.ofsDeltas = make([]ofsDeltaRef, 0, state.objectCountHeader) - state.refDeltas = make([]refDeltaRef, 0, state.objectCountHeader) - - total := state.objectCountHeader - meter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "receiving objects", - Total: uint64(total), - Throughput: true, - }) - - for i := range total { - nextOffset, err := scanOneEntry(state, state.stream.consumed) - if err != nil { - return err - } - - if nextOffset != state.stream.consumed { - return fmt.Errorf("packfile/ingest: internal stream offset mismatch") - } - - done := i + 1 - meter.Set(uint64(done), state.stream.consumed) - } - - meter.Stop("done") - - err = state.stream.finishAndFlushTrailer(state.opts.RequireTrailingEOF) - if err != nil { - return err - } - - if len(state.stream.packTrailer) != state.algo.Size() { - return fmt.Errorf("packfile/ingest: invalid trailer size") - } - - packHash, err := objectid.FromBytes(state.algo, state.stream.packTrailer) - if err != nil { - return err - } - - state.packHash = packHash - - return state.stream.flush() -} - -// seedStreamWithPackHeader writes the already-validated PACK header to output, -// seeds the running pack hash, and advances stream offset accounting. -func seedStreamWithPackHeader(state *ingestState) error { - written := 0 - for written < len(state.packHeaderRaw) { - n, err := state.packFile.Write(state.packHeaderRaw[written:]) - if err != nil { - return &DestinationWriteError{Op: fmt.Sprintf("write pack header: %v", err)} - } - - if n == 0 { - return &DestinationWriteError{Op: "write pack header: short write"} - } - - written += n - } - - _, err := state.stream.hash.Write(state.packHeaderRaw[:]) - if err != nil { - return err - } - - state.stream.consumed = packHeaderSize - - return nil -} diff --git a/packfile/ingest/state.go b/packfile/ingest/state.go deleted file mode 100644 index 797323b2..00000000 --- a/packfile/ingest/state.go +++ /dev/null @@ -1,70 +0,0 @@ -package ingest - -import ( - "io" - "os" - - objectid "codeberg.org/lindenii/furgit/object/id" -) - -const ( - defaultDeltaBaseCacheMaxBytes = 32 << 20 -) - -// ingestState holds mutable state for one Ingest call. -type ingestState struct { - src io.Reader - destination *os.Root - algo objectid.Algorithm - opts Options - - packHeaderRaw [packHeaderSize]byte - - packFile *os.File - packTmpName string - idxFile *os.File - idxTmpName string - revFile *os.File - revTmpName string - - stream *streamScanner - - records []objectRecord - ofsDeltas []ofsDeltaRef - refDeltas []refDeltaRef - unresolvedRefDeltas []int - offsetToRecord map[uint64]int - objectToRecord map[objectid.ObjectID]int - - baseCache *deltaBaseCache - packHash objectid.ObjectID - - objectCountHeader uint32 - thinFixed bool -} - -// newIngestState constructs one call-local ingest state. -func newIngestState( - src io.Reader, - destination *os.Root, - algo objectid.Algorithm, - opts Options, - header HeaderInfo, - headerRaw [packHeaderSize]byte, -) (*ingestState, error) { - if algo.Size() == 0 { - return nil, objectid.ErrInvalidAlgorithm - } - - return &ingestState{ - src: src, - destination: destination, - algo: algo, - opts: opts, - packHeaderRaw: headerRaw, - objectCountHeader: header.ObjectCount, - offsetToRecord: make(map[uint64]int), - objectToRecord: make(map[objectid.ObjectID]int), - baseCache: newDeltaBaseCache(defaultDeltaBaseCacheMaxBytes), - }, nil -} diff --git a/packfile/ingest/stream.go b/packfile/ingest/stream.go deleted file mode 100644 index a403087a..00000000 --- a/packfile/ingest/stream.go +++ /dev/null @@ -1,111 +0,0 @@ -package ingest - -import ( - "errors" - "hash" - "io" - "os" -) - -const streamScannerBufferSize = 64 << 10 - -// streamScanner incrementally reads/consumes one pack stream while mirroring -// consumed bytes into one destination pack file. -type streamScanner struct { - src io.Reader - dstFile *os.File - - // Input buffer window: buf[off:n] is unread. - buf []byte - off int - n int - - // Absolute consumed stream bytes. - consumed uint64 - - // Running pack hash over consumed bytes while hashEnabled is true. - hash hash.Hash - hashSize int - hashEnabled bool - - // Entry CRC state while one entry is being consumed. - entryCRC uint32 - inEntryCRC bool - - packTrailer []byte -} - -// newStreamScanner constructs one scanner with fixed input buffering. -func newStreamScanner(src io.Reader, dstFile *os.File, hash hash.Hash, hashSize int) *streamScanner { - return &streamScanner{ - src: src, - dstFile: dstFile, - buf: make([]byte, streamScannerBufferSize), - hash: hash, - hashSize: hashSize, - hashEnabled: true, - } -} - -// Read implements io.Reader. -func (scanner *streamScanner) Read(dst []byte) (int, error) { - if len(dst) == 0 { - return 0, nil - } - - if scanner.n-scanner.off == 0 { - err := scanner.fill(1) - if err != nil { - if errors.Is(err, io.EOF) { - return 0, io.EOF - } - - return 0, err - } - } - - unread := scanner.n - scanner.off - if unread == 0 { - return 0, io.EOF - } - - n := min(len(dst), unread) - - copy(dst, scanner.buf[scanner.off:scanner.off+n]) - - err := scanner.use(n) - if err != nil { - return 0, err - } - - return n, nil -} - -// ReadByte implements io.ByteReader without allocation. -func (scanner *streamScanner) ReadByte() (byte, error) { - if scanner.n-scanner.off == 0 { - err := scanner.fill(1) - if err != nil { - return 0, err - } - } - - b := scanner.buf[scanner.off] - - err := scanner.use(1) - if err != nil { - return 0, err - } - - return b, nil -} - -// readFull reads exactly len(dst) bytes through receiver. -func (scanner *streamScanner) readFull(dst []byte) error { - _, err := io.ReadFull(scanner, dst) - if err != nil { - return err - } - - return nil -} diff --git a/packfile/ingest/temp.go b/packfile/ingest/temp.go deleted file mode 100644 index d0b7862c..00000000 --- a/packfile/ingest/temp.go +++ /dev/null @@ -1,103 +0,0 @@ -package ingest - -import ( - "crypto/rand" - "errors" - "fmt" - "io/fs" - "os" -) - -// openTemporaryArtifacts creates/open temp pack/idx/(rev) files under destination. -func openTemporaryArtifacts(state *ingestState) error { - packName, packFile, err := createTempFile(state.destination, "tmp_pack_") - if err != nil { - return err - } - - idxName, idxFile, err := createTempFile(state.destination, "tmp_idx_") - if err != nil { - _ = packFile.Close() - _ = state.destination.Remove(packName) - - return err - } - - revName := "" - - var revFile *os.File - if state.opts.WriteRev { - revName, revFile, err = createTempFile(state.destination, "tmp_rev_") - if err != nil { - _ = idxFile.Close() - _ = state.destination.Remove(idxName) - _ = packFile.Close() - _ = state.destination.Remove(packName) - - return err - } - } - - state.packTmpName = packName - state.packFile = packFile - state.idxTmpName = idxName - state.idxFile = idxFile - state.revTmpName = revName - state.revFile = revFile - - return nil -} - -// closeTemporaryArtifacts closes all temporary artifact file descriptors. -func closeTemporaryArtifacts(state *ingestState) error { - var out error - - if state.packFile != nil { - err := state.packFile.Close() - if err != nil && out == nil { - out = err - } - - state.packFile = nil - } - - if state.idxFile != nil { - err := state.idxFile.Close() - if err != nil && out == nil { - out = err - } - - state.idxFile = nil - } - - if state.revFile != nil { - err := state.revFile.Close() - if err != nil && out == nil { - out = err - } - - state.revFile = nil - } - - return out -} - -// createTempFile creates one temporary file under root using prefix. -func createTempFile(root *os.Root, prefix string) (string, *os.File, error) { - for range 32 { - name := prefix + rand.Text() - - file, err := root.OpenFile(name, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0o644) - if err == nil { - return name, file, nil - } - - if errors.Is(err, fs.ErrExist) { - continue - } - - return "", nil, fmt.Errorf("packfile/ingest: create temp file %q: %w", name, err) - } - - return "", nil, fmt.Errorf("packfile/ingest: unable to create temporary file for prefix %q", prefix) -} diff --git a/packfile/ingest/testdata/fixtures/sha1/METADATA.txt b/packfile/ingest/testdata/fixtures/sha1/METADATA.txt deleted file mode 100644 index 5fcbfe26..00000000 --- a/packfile/ingest/testdata/fixtures/sha1/METADATA.txt +++ /dev/null @@ -1,3 +0,0 @@ -format=sha1 -head=200c960359dad025b4170284c518919eb4a24305 -base=4bc507fc631ea78474d83c47548743c9f1dda0dc diff --git a/packfile/ingest/testdata/fixtures/sha1/base.pack b/packfile/ingest/testdata/fixtures/sha1/base.pack Binary files differdeleted file mode 100644 index 3d7a4903..00000000 --- a/packfile/ingest/testdata/fixtures/sha1/base.pack +++ /dev/null diff --git a/packfile/ingest/testdata/fixtures/sha1/nonthin.pack b/packfile/ingest/testdata/fixtures/sha1/nonthin.pack Binary files differdeleted file mode 100644 index ea07c9a0..00000000 --- a/packfile/ingest/testdata/fixtures/sha1/nonthin.pack +++ /dev/null diff --git a/packfile/ingest/testdata/fixtures/sha1/thin.pack b/packfile/ingest/testdata/fixtures/sha1/thin.pack Binary files differdeleted file mode 100644 index 95084feb..00000000 --- a/packfile/ingest/testdata/fixtures/sha1/thin.pack +++ /dev/null diff --git a/packfile/ingest/testdata/fixtures/sha256/METADATA.txt b/packfile/ingest/testdata/fixtures/sha256/METADATA.txt deleted file mode 100644 index 8a5ea0a2..00000000 --- a/packfile/ingest/testdata/fixtures/sha256/METADATA.txt +++ /dev/null @@ -1,3 +0,0 @@ -format=sha256 -head=35cc0f4cd1c73524187540494058d233a2ecbd071c85d496a2250d8e0c805ef8 -base=b4abe46895f0bb5aa22fd42d28d428413f265359734c288752e3c2d270eec276 diff --git a/packfile/ingest/testdata/fixtures/sha256/base.pack b/packfile/ingest/testdata/fixtures/sha256/base.pack Binary files differdeleted file mode 100644 index 52ceef74..00000000 --- a/packfile/ingest/testdata/fixtures/sha256/base.pack +++ /dev/null diff --git a/packfile/ingest/testdata/fixtures/sha256/nonthin.pack b/packfile/ingest/testdata/fixtures/sha256/nonthin.pack Binary files differdeleted file mode 100644 index 50db05d0..00000000 --- a/packfile/ingest/testdata/fixtures/sha256/nonthin.pack +++ /dev/null diff --git a/packfile/ingest/testdata/fixtures/sha256/thin.pack b/packfile/ingest/testdata/fixtures/sha256/thin.pack Binary files differdeleted file mode 100644 index b331b915..00000000 --- a/packfile/ingest/testdata/fixtures/sha256/thin.pack +++ /dev/null diff --git a/packfile/ingest/thin_append.go b/packfile/ingest/thin_append.go deleted file mode 100644 index 779d477f..00000000 --- a/packfile/ingest/thin_append.go +++ /dev/null @@ -1,91 +0,0 @@ -package ingest - -import ( - "compress/zlib" - "hash/crc32" - "io" - - "codeberg.org/lindenii/furgit/internal/intconv" - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// appendBaseObject appends one base object as a new packed non-delta entry. -func appendBaseObject(state *ingestState, id objectid.ObjectID, realType objecttype.Type, content []byte) (int, error) { - start := state.stream.consumed - - header := encodePackEntryHeader(realType, int64(len(content))) - - startInt64, err := intconv.Uint64ToInt64(start) - if err != nil { - return 0, err - } - - _, err = state.packFile.WriteAt(header, startInt64) - if err != nil { - return 0, err - } - - headerLenInt64 := int64(len(header)) - section := &fileSectionWriter{file: state.packFile, off: startInt64 + headerLenInt64} - crc := crc32.NewIEEE() - - _, err = crc.Write(header) - if err != nil { - return 0, err - } - - counting := &countingWriter{dst: section} - - zw := zlib.NewWriter(io.MultiWriter(counting, crc)) - - _, err = zw.Write(content) - if err != nil { - return 0, err - } - - err = zw.Close() - if err != nil { - return 0, err - } - - headerLenUint64, err := intconv.IntToUint64(len(header)) - if err != nil { - return 0, err - } - - countingNUint64, err := intconv.IntToUint64(counting.n) - if err != nil { - return 0, err - } - - packedLen := headerLenUint64 + countingNUint64 - end := start + packedLen - state.stream.consumed = end - - headerLenUint32, err := intconv.IntToUint32(len(header)) - if err != nil { - return 0, err - } - - record := objectRecord{ - offset: start, - headerLen: headerLenUint32, - packedLen: packedLen, - crc32: crc.Sum32(), - packedType: realType, - realType: realType, - declaredSize: int64(len(content)), - dataOffset: start + headerLenUint64, - objectID: id, - resolved: true, - } - - recordIdx := len(state.records) - state.records = append(state.records, record) - state.offsetToRecord[start] = recordIdx - state.objectToRecord[id] = recordIdx - state.baseCache.add(recordIdx, realType, content) - - return recordIdx, nil -} diff --git a/packfile/ingest/thin_fix.go b/packfile/ingest/thin_fix.go deleted file mode 100644 index 83e5572a..00000000 --- a/packfile/ingest/thin_fix.go +++ /dev/null @@ -1,100 +0,0 @@ -package ingest - -import ( - "errors" - "fmt" - - "codeberg.org/lindenii/furgit/internal/intconv" - "codeberg.org/lindenii/furgit/internal/progress" - objectstorer "codeberg.org/lindenii/furgit/object/storer" -) - -// maybeFixThin appends missing bases and rewrites pack header/trailer when needed. -func maybeFixThin(state *ingestState) error { - if len(state.unresolvedRefDeltas) == 0 { - return nil - } - - writeProgressf( - state, - "fixing thin pack: %d unresolved bases\r", - len(state.unresolvedRefDeltas), - ) - - if !state.opts.FixThin { - return &ThinPackUnresolvedError{Count: len(state.unresolvedRefDeltas)} - } - - if state.opts.Base == nil { - return &ThinPackUnresolvedError{Count: len(state.unresolvedRefDeltas)} - } - - hashSize := int64(state.algo.Size()) - - info, err := state.packFile.Stat() - if err != nil { - return err - } - - size := info.Size() - if size < hashSize { - return fmt.Errorf("packfile/ingest: pack too short to trim trailer") - } - - newEnd := size - hashSize - - err = state.packFile.Truncate(newEnd) - if err != nil { - return err - } - - consumed, err := intconv.Int64ToUint64(newEnd) - if err != nil { - return err - } - - state.stream.consumed = consumed - - baseIDs := unresolvedThinBaseIDs(state) - - total := len(baseIDs) - meter := progress.New(progress.Options{ - Writer: state.opts.Progress, - Flush: state.opts.ProgressFlush, - Title: "fixing thin pack", - Total: uint64(total), - }) - meter.Set(0, 0) - - var appended uint64 - - for _, id := range baseIDs { - ty, content, err := state.opts.Base.ReadBytesContent(id) - if err != nil { - if errors.Is(err, objectstorer.ErrObjectNotFound) { - continue - } - - return fmt.Errorf("packfile/ingest: read thin base %s: %w", id, err) - } - - _, err = appendBaseObject(state, id, ty, content) - if err != nil { - return err - } - - state.thinFixed = true - - appended++ - meter.Set(appended, 0) - } - - err = rewritePackHeaderAndTrailer(state) - if err != nil { - return err - } - - meter.Stop(fmt.Sprintf("appended %d/%d, done", appended, total)) - - return nil -} diff --git a/packfile/ingest/thin_unresolved.go b/packfile/ingest/thin_unresolved.go deleted file mode 100644 index 757cc0e2..00000000 --- a/packfile/ingest/thin_unresolved.go +++ /dev/null @@ -1,34 +0,0 @@ -package ingest - -import ( - "bytes" - "slices" - - objectid "codeberg.org/lindenii/furgit/object/id" - objecttype "codeberg.org/lindenii/furgit/object/type" -) - -// unresolvedThinBaseIDs returns sorted unique unresolved ref base IDs. -func unresolvedThinBaseIDs(state *ingestState) []objectid.ObjectID { - seen := make(map[objectid.ObjectID]struct{}) - - for _, idx := range state.unresolvedRefDeltas { - record := state.records[idx] - if record.packedType != objecttype.TypeRefDelta { - continue - } - - seen[record.baseObject] = struct{}{} - } - - out := make([]objectid.ObjectID, 0, len(seen)) - for id := range seen { - out = append(out, id) - } - - slices.SortFunc(out, func(a, b objectid.ObjectID) int { - return bytes.Compare(a.RawBytes(), b.RawBytes()) - }) - - return out -} diff --git a/packfile/ingest/trailer.go b/packfile/ingest/trailer.go deleted file mode 100644 index 7a26a8f2..00000000 --- a/packfile/ingest/trailer.go +++ /dev/null @@ -1,58 +0,0 @@ -package ingest - -import ( - "bytes" - "errors" - "fmt" - "io" -) - -// finishAndFlushTrailer reads trailer hash bytes, verifies trailer checksum, -// and optionally requires the source stream to hit EOF afterward. -func (scanner *streamScanner) finishAndFlushTrailer(requireTrailingEOF bool) error { - if scanner.hashSize <= 0 { - return fmt.Errorf("packfile/ingest: invalid hash size") - } - - trailer := make([]byte, scanner.hashSize) - - scanner.hashEnabled = false - - err := scanner.readFull(trailer) - if err != nil { - return &PackTrailerMismatchError{} - } - - scanner.packTrailer = append(scanner.packTrailer[:0], trailer...) - - if scanner.n-scanner.off > 0 { - return fmt.Errorf("packfile/ingest: pack has trailing garbage") - } - - if !requireTrailingEOF { - computed := scanner.hash.Sum(nil) - if !bytes.Equal(computed, trailer) { - return &PackTrailerMismatchError{} - } - - return nil - } - - var probe [1]byte - - n, err := scanner.Read(probe[:]) - if n > 0 || err == nil { - return fmt.Errorf("packfile/ingest: pack has trailing garbage") - } - - if !errors.Is(err, io.EOF) { - return err - } - - computed := scanner.hash.Sum(nil) - if !bytes.Equal(computed, trailer) { - return &PackTrailerMismatchError{} - } - - return nil -} diff --git a/packfile/ingest/use.go b/packfile/ingest/use.go deleted file mode 100644 index 97f8757a..00000000 --- a/packfile/ingest/use.go +++ /dev/null @@ -1,34 +0,0 @@ -package ingest - -import ( - "fmt" - "hash/crc32" -) - -// use consumes n unread bytes and updates accounting/checksum state. -func (scanner *streamScanner) use(n int) error { - if n < 0 || n > scanner.n-scanner.off { - return fmt.Errorf("packfile/ingest: invalid consume length %d", n) - } - - if n == 0 { - return nil - } - - chunk := scanner.buf[scanner.off : scanner.off+n] - if scanner.hashEnabled { - _, err := scanner.hash.Write(chunk) - if err != nil { - return err - } - } - - if scanner.inEntryCRC { - scanner.entryCRC = crc32.Update(scanner.entryCRC, crc32.IEEETable, chunk) - } - - scanner.off += n - scanner.consumed += uint64(n) - - return nil -} diff --git a/packfile/object_type.go b/packfile/object_type.go deleted file mode 100644 index 8382baa9..00000000 --- a/packfile/object_type.go +++ /dev/null @@ -1,16 +0,0 @@ -package packfile - -import objecttype "codeberg.org/lindenii/furgit/object/type" - -// IsBaseObjectType reports whether ty is one of the four canonical object -// types encoded directly in pack entries. -func IsBaseObjectType(ty objecttype.Type) bool { - switch ty { - case objecttype.TypeCommit, objecttype.TypeTree, objecttype.TypeBlob, objecttype.TypeTag: - return true - case objecttype.TypeInvalid, objecttype.TypeFuture, objecttype.TypeOfsDelta, objecttype.TypeRefDelta: - return false - default: - return false - } -} diff --git a/packfile/ofs.go b/packfile/ofs.go deleted file mode 100644 index 4992a506..00000000 --- a/packfile/ofs.go +++ /dev/null @@ -1,26 +0,0 @@ -package packfile - -import "fmt" - -// ParseOfsDeltaDistance parses one ofs-delta backward distance. -func ParseOfsDeltaDistance(buf []byte) (uint64, int, error) { - if len(buf) == 0 { - return 0, 0, fmt.Errorf("packfile: malformed ofs-delta distance") - } - - b := buf[0] - dist := uint64(b & 0x7f) - - consumed := 1 - for b&0x80 != 0 { - if consumed >= len(buf) { - return 0, 0, fmt.Errorf("packfile: malformed ofs-delta distance") - } - - b = buf[consumed] - consumed++ - dist = ((dist + 1) << 7) + uint64(b&0x7f) - } - - return dist, consumed, nil -} |