// Copyright 2018 The Gitea Authors. All rights reserved. // SPDX-License-Identifier: MIT //go:build gogit package git import ( "bytes" "fmt" "strconv" "strings" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/filemode" "github.com/go-git/go-git/v5/plumbing/hash" "github.com/go-git/go-git/v5/plumbing/object" ) // ParseTreeEntries parses the output of a `git ls-tree -l` 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> <space-padded-size>\t<filename>" entry := new(TreeEntry) entry.gogitTreeEntry = &object.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.gogitTreeEntry.Mode = filemode.Regular pos += 12 // skip over "100644 blob " case "100755": entry.gogitTreeEntry.Mode = filemode.Executable pos += 12 // skip over "100755 blob " case "120000": entry.gogitTreeEntry.Mode = filemode.Symlink pos += 12 // skip over "120000 blob " case "160000": entry.gogitTreeEntry.Mode = filemode.Submodule pos += 14 // skip over "160000 object " case "040000": entry.gogitTreeEntry.Mode = filemode.Dir pos += 12 // skip over "040000 tree " default: return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+6])) } // in hex format, not byte format .... if pos+hash.Size*2 > len(data) { return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data)) } var err error entry.ID, err = NewIDFromString(string(data[pos : pos+hash.Size*2])) if err != nil { return nil, fmt.Errorf("invalid ls-tree output: %w", err) } entry.gogitTreeEntry.Hash = plumbing.Hash(entry.ID.RawValue()) pos += 41 // skip over sha and trailing space end := pos + bytes.IndexByte(data[pos:], '\t') if end < pos { return nil, fmt.Errorf("Invalid ls-tree -l output: %s", string(data)) } entry.size, _ = strconv.ParseInt(strings.TrimSpace(string(data[pos:end])), 10, 64) entry.sized = true pos = end + 1 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] == '"' { var err error entry.gogitTreeEntry.Name, err = strconv.Unquote(string(data[pos:end])) if err != nil { return nil, fmt.Errorf("Invalid ls-tree output: %w", err) } } else { entry.gogitTreeEntry.Name = string(data[pos:end]) } pos = end + 1 entries = append(entries, entry) } return entries, nil }