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|
package files
import (
"errors"
"fmt"
"os"
"strings"
"codeberg.org/lindenii/furgit/objectid"
"codeberg.org/lindenii/furgit/ref"
"codeberg.org/lindenii/furgit/refstore"
)
type brokenRefError struct {
name string
err error
}
func (err brokenRefError) Error() string {
return fmt.Sprintf("refstore/files: broken reference %q: %v", err.name, err.err)
}
func (err brokenRefError) Unwrap() error {
return err.err
}
func (store *Store) readLooseRef(name string) (ref.Ref, error) { //nolint:ireturn
refPath := store.loosePath(name)
data, err := store.rootFor(refPath.root).ReadFile(refPath.path)
if err != nil {
if errors.Is(err, os.ErrNotExist) {
return nil, refstore.ErrReferenceNotFound
}
return nil, err
}
line := trimTrailingRefWhitespace(string(data))
if strings.HasPrefix(line, "ref:") {
target := strings.TrimLeftFunc(line[len("ref:"):], isRefWhitespace)
if target == "" {
return nil, brokenRefError{name: name, err: fmt.Errorf("empty symbolic target")}
}
return ref.Symbolic{
RefName: name,
Target: target,
}, nil
}
id, err := objectid.ParseHex(store.algo, line)
if err != nil {
return nil, brokenRefError{name: name, err: err}
}
return ref.Detached{
RefName: name,
ID: id,
}, nil
}
func trimTrailingRefWhitespace(text string) string {
return strings.TrimRightFunc(text, isRefWhitespace)
}
func isRefWhitespace(r rune) bool {
switch r {
case ' ', '\t', '\n', '\r', '\v', '\f':
return true
default:
return false
}
}
|
