types: add backwards compat layer to filemode handling #816

merged
opened by
oppi.li 4 weeks ago targeting master from op/vkqnuulvrqxy
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
options
unified split
Changed files
+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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       	// 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 {