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// Copyright 2018 The Gitea 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"
"strconv"
)
// ParseTreeEntries parses the output of a `git ls-tree` command.
func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
return parseTreeEntries(data, nil)
}
func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
entries := make([]*TreeEntry, 0, 10)
for pos := 0; pos < len(data); {
// expect line to be of the form "<mode> <type> <sha>\t<filename>"
entry := new(TreeEntry)
entry.ptree = ptree
if pos+6 > len(data) {
return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
}
switch string(data[pos : pos+6]) {
case "100644":
entry.mode = EntryModeBlob
entry.Type = ObjectBlob
pos += 12 // skip over "100644 blob "
case "100755":
entry.mode = EntryModeExec
entry.Type = ObjectBlob
pos += 12 // skip over "100755 blob "
case "120000":
entry.mode = EntryModeSymlink
entry.Type = ObjectBlob
pos += 12 // skip over "120000 blob "
case "160000":
entry.mode = EntryModeCommit
entry.Type = ObjectCommit
pos += 14 // skip over "160000 object "
case "040000":
entry.mode = EntryModeTree
entry.Type = ObjectTree
pos += 12 // skip over "040000 tree "
default:
return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+6]))
}
if pos+40 > len(data) {
return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
}
id, err := NewIDFromString(string(data[pos : pos+40]))
if err != nil {
return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
}
entry.ID = id
pos += 41 // skip over sha and trailing space
end := pos + bytes.IndexByte(data[pos:], '\n')
if end < pos {
return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
}
// In case entry name is surrounded by double quotes(it happens only in git-shell).
if data[pos] == '"' {
entry.name, err = strconv.Unquote(string(data[pos:end]))
if err != nil {
return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
}
} else {
entry.name = string(data[pos:end])
}
pos = end + 1
entries = append(entries, entry)
}
return entries, nil
}
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