lewis.moe
Monorepo for Tangled
types: add backwards compat layer to filemode handling
older knots return a full modestring for each file. use some primitive
parsing to extract a filemode in these scenarios.
Signed-off-by: oppiliappan <me@oppi.li>
authored by
oppiliappan
and committed by
Tangled
a17d65a1
fb667186
+61
-1
types/tree.go
+61
-1
types/tree.go
···
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package types
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import (
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"fmt"
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"os"
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"time"
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"github.com/go-git/go-git/v5/plumbing"
···
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}
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func (t *NiceTree) FileMode() (filemode.FileMode, error) {
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return filemode.New(t.Mode)
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if numericMode, err := filemode.New(t.Mode); err == nil {
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return numericMode, nil
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}
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+
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// TODO: this is here for backwards compat, can be removed in future versions
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osMode, err := parseModeString(t.Mode)
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if err != nil {
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return filemode.Empty, nil
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}
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conv, err := filemode.NewFromOSFileMode(osMode)
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if err != nil {
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return filemode.Empty, nil
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}
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return conv, nil
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}
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// ParseFileModeString parses a file mode string like "-rw-r--r--"
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// and returns an os.FileMode
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func parseModeString(modeStr string) (os.FileMode, error) {
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if len(modeStr) != 10 {
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return 0, fmt.Errorf("invalid mode string length: expected 10, got %d", len(modeStr))
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}
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var mode os.FileMode
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// Parse file type (first character)
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switch modeStr[0] {
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case 'd':
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mode |= os.ModeDir
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case 'l':
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mode |= os.ModeSymlink
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case '-':
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// regular file
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default:
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return 0, fmt.Errorf("unknown file type: %c", modeStr[0])
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}
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// parse permissions for owner, group, and other
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perms := modeStr[1:]
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shifts := []int{6, 3, 0} // bit shifts for owner, group, other
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for i := range 3 {
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offset := i * 3
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shift := shifts[i]
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if perms[offset] == 'r' {
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mode |= os.FileMode(4 << shift)
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}
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if perms[offset+1] == 'w' {
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mode |= os.FileMode(2 << shift)
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}
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if perms[offset+2] == 'x' {
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mode |= os.FileMode(1 << shift)
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}
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}
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return mode, nil
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}
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func (t *NiceTree) IsFile() bool {