152 lines
3.0 KiB
Go
152 lines
3.0 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package git
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// Tree represents a flat directory listing.
|
|
type Tree struct {
|
|
ID sha1
|
|
repo *Repository
|
|
|
|
// parent tree
|
|
ptree *Tree
|
|
|
|
entries Entries
|
|
entriesParsed bool
|
|
}
|
|
|
|
func NewTree(repo *Repository, id sha1) *Tree {
|
|
return &Tree{
|
|
ID: id,
|
|
repo: repo,
|
|
}
|
|
}
|
|
|
|
var escapeChar = []byte("\\")
|
|
|
|
// UnescapeChars reverses escaped characters.
|
|
func UnescapeChars(in []byte) []byte {
|
|
if bytes.Index(in, escapeChar) == -1 {
|
|
return in
|
|
}
|
|
|
|
endIdx := len(in) - 1
|
|
isEscape := false
|
|
out := make([]byte, 0, endIdx+1)
|
|
for i := range in {
|
|
if in[i] == '\\' && !isEscape {
|
|
isEscape = true
|
|
continue
|
|
}
|
|
isEscape = false
|
|
out = append(out, in[i])
|
|
}
|
|
return out
|
|
}
|
|
|
|
// parseTreeData parses tree information from the (uncompressed) raw
|
|
// data from the tree object.
|
|
func parseTreeData(tree *Tree, data []byte) ([]*TreeEntry, error) {
|
|
entries := make([]*TreeEntry, 0, 10)
|
|
l := len(data)
|
|
pos := 0
|
|
for pos < l {
|
|
entry := new(TreeEntry)
|
|
entry.ptree = tree
|
|
step := 6
|
|
switch string(data[pos : pos+step]) {
|
|
case "100644":
|
|
entry.mode = ENTRY_MODE_BLOB
|
|
entry.Type = OBJECT_BLOB
|
|
case "100755":
|
|
entry.mode = ENTRY_MODE_EXEC
|
|
entry.Type = OBJECT_BLOB
|
|
case "120000":
|
|
entry.mode = ENTRY_MODE_SYMLINK
|
|
entry.Type = OBJECT_BLOB
|
|
case "160000":
|
|
entry.mode = ENTRY_MODE_COMMIT
|
|
entry.Type = OBJECT_COMMIT
|
|
|
|
step = 8
|
|
case "040000":
|
|
entry.mode = ENTRY_MODE_TREE
|
|
entry.Type = OBJECT_TREE
|
|
default:
|
|
return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+step]))
|
|
}
|
|
pos += step + 6 // Skip string type of entry type.
|
|
|
|
step = 40
|
|
id, err := NewIDFromString(string(data[pos : pos+step]))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
entry.ID = id
|
|
pos += step + 1 // Skip half of sha1.
|
|
|
|
step = bytes.IndexByte(data[pos:], '\n')
|
|
|
|
// In case entry name is surrounded by double quotes(it happens only in git-shell).
|
|
if data[pos] == '"' {
|
|
entry.name = string(UnescapeChars(data[pos+1 : pos+step-1]))
|
|
} else {
|
|
entry.name = string(data[pos : pos+step])
|
|
}
|
|
|
|
pos += step + 1
|
|
entries = append(entries, entry)
|
|
}
|
|
return entries, nil
|
|
}
|
|
|
|
func (t *Tree) SubTree(rpath string) (*Tree, error) {
|
|
if len(rpath) == 0 {
|
|
return t, nil
|
|
}
|
|
|
|
paths := strings.Split(rpath, "/")
|
|
var (
|
|
err error
|
|
g = t
|
|
p = t
|
|
te *TreeEntry
|
|
)
|
|
for _, name := range paths {
|
|
te, err = p.GetTreeEntryByPath(name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
g, err = t.repo.getTree(te.ID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
g.ptree = p
|
|
p = g
|
|
}
|
|
return g, nil
|
|
}
|
|
|
|
// ListEntries returns all entries of current tree.
|
|
func (t *Tree) ListEntries() (Entries, error) {
|
|
if t.entriesParsed {
|
|
return t.entries, nil
|
|
}
|
|
t.entriesParsed = true
|
|
|
|
stdout, err := NewCommand("ls-tree", t.ID.String()).RunInDirBytes(t.repo.Path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
t.entries, err = parseTreeData(t, stdout)
|
|
return t.entries, err
|
|
}
|