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package repository_test
import (
"fmt"
"os"
"path/filepath"
"strings"
"testing"
"codeberg.org/lindenii/furgit/internal/testgit"
"codeberg.org/lindenii/furgit/object"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/repository"
)
func TestRepositoryDepthFirstEnumerationFromHEAD(t *testing.T) {
t.Parallel()
testgit.ForEachAlgorithm(t, func(t *testing.T, algo objectid.Algorithm) { //nolint:thelper
repoHarness := testgit.NewRepo(t, testgit.RepoOptions{
ObjectFormat: algo,
Bare: true,
RefFormat: "files",
})
_, _, commit1 := repoHarness.MakeCommit(t, "walk-one")
blob2, tree2 := repoHarness.MakeSingleFileTree(t, "second.txt", []byte("second\n"))
commit2 := repoHarness.CommitTree(t, tree2, "walk-two", commit1)
_ = blob2
repoHarness.UpdateRef(t, "refs/heads/main", commit2)
repoHarness.SymbolicRef(t, "HEAD", "refs/heads/main")
walkRepositoryFromHead(t, repoHarness.Dir())
})
}
func TestRepositoryDepthFirstEnumerationCurrentWorktree(t *testing.T) {
t.Parallel()
worktreeRoot := filepath.Clean("..")
gitPath := filepath.Join(worktreeRoot, ".git")
info, err := os.Stat(gitPath)
if err != nil {
t.Fatalf("stat %q: %v", gitPath, err)
}
if info.IsDir() {
walkRepositoryFromHead(t, gitPath)
return
}
if !info.Mode().IsRegular() {
t.Fatalf("%q is neither a directory nor a regular file", gitPath)
}
content, err := os.ReadFile(gitPath) //#nosec G304
if err != nil {
t.Fatalf("read %q: %v", gitPath, err)
}
line := strings.TrimSpace(string(content))
prefix := "gitdir: "
if !strings.HasPrefix(line, prefix) {
t.Fatalf("%q file does not begin with %q", gitPath, prefix)
}
gitdirRel := strings.TrimSpace(line[len(prefix):])
if gitdirRel == "" {
t.Fatalf("%q contains empty gitdir path", gitPath)
}
gitdirPath := gitdirRel
if !filepath.IsAbs(gitdirPath) {
gitdirPath = filepath.Join(worktreeRoot, gitdirPath)
}
commondirPath := filepath.Join(gitdirPath, "commondir")
commondirContent, err := os.ReadFile(commondirPath) //#nosec G304
if err != nil {
t.Fatalf("read %q: %v", commondirPath, err)
}
repoPath := strings.TrimSpace(string(commondirContent))
if repoPath == "" {
t.Fatalf("%q contains empty repo path", commondirPath)
}
if filepath.IsAbs(repoPath) {
walkRepositoryFromHead(t, repoPath)
return
}
repoPath = filepath.Join(gitdirPath, repoPath)
walkRepositoryFromHead(t, repoPath)
}
func walkRepositoryFromHead(t *testing.T, repoPath string) {
t.Helper()
repo, err := repository.Open(repoPath)
if err != nil {
t.Fatalf("repository.Open(%q): %v", repoPath, err)
}
defer func() { _ = repo.Close() }()
head, err := repo.ResolveRefFully("HEAD")
if err != nil {
t.Fatalf("ResolveRefFully(HEAD): %v", err)
}
visited := make(map[objectid.ObjectID]bool)
queue := []objectid.ObjectID{head.ID}
objectsRead := 0
for len(queue) > 0 {
id := queue[0]
queue = queue[1:]
if visited[id] {
continue
}
visited[id] = true
stored, err := repo.ReadStored(id)
if err != nil {
t.Fatalf("ReadStored(%s): %v", id, err)
}
objectsRead++
switch obj := stored.Object().(type) {
case *object.Commit:
queue = append(queue, obj.Tree)
queue = append(queue, obj.Parents...)
case *object.Tree:
for _, entry := range obj.Entries {
queue = append(queue, entry.ID)
}
case *object.Tag:
queue = append(queue, obj.Target)
case *object.Blob:
default:
t.Fatalf("unexpected object type: %T", obj)
}
}
if objectsRead == 0 {
t.Fatalf("no objects were enumerated from HEAD (%s)", fmt.Sprintf("%q", repoPath))
}
}
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