Initial commit, source code of Gitea 1.23.1

modules/git/parse_nogogit.go

@@ -0,0 +1,96 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !gogit
+
+package git
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+
+	"code.gitea.io/gitea/modules/log"
+)
+
+// ParseTreeEntries parses the output of a `git ls-tree -l` command.
+func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
+	return parseTreeEntries(data, nil)
+}
+
+// parseTreeEntries FIXME this function's design is not right, it should make the caller read all data into memory
+func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
+	entries := make([]*TreeEntry, 0, bytes.Count(data, []byte{'\n'})+1)
+	for pos := 0; pos < len(data); {
+		posEnd := bytes.IndexByte(data[pos:], '\n')
+		if posEnd == -1 {
+			posEnd = len(data)
+		} else {
+			posEnd += pos
+		}
+
+		line := data[pos:posEnd]
+		lsTreeLine, err := parseLsTreeLine(line)
+		if err != nil {
+			return nil, err
+		}
+		entry := &TreeEntry{
+			ptree:     ptree,
+			ID:        lsTreeLine.ID,
+			entryMode: lsTreeLine.EntryMode,
+			name:      lsTreeLine.Name,
+			size:      lsTreeLine.Size.Value(),
+			sized:     lsTreeLine.Size.Has(),
+		}
+		pos = posEnd + 1
+		entries = append(entries, entry)
+	}
+	return entries, nil
+}
+
+func catBatchParseTreeEntries(objectFormat ObjectFormat, ptree *Tree, rd *bufio.Reader, sz int64) ([]*TreeEntry, error) {
+	fnameBuf := make([]byte, 4096)
+	modeBuf := make([]byte, 40)
+	shaBuf := make([]byte, objectFormat.FullLength())
+	entries := make([]*TreeEntry, 0, 10)
+
+loop:
+	for sz > 0 {
+		mode, fname, sha, count, err := ParseCatFileTreeLine(objectFormat, rd, modeBuf, fnameBuf, shaBuf)
+		if err != nil {
+			if err == io.EOF {
+				break loop
+			}
+			return nil, err
+		}
+		sz -= int64(count)
+		entry := new(TreeEntry)
+		entry.ptree = ptree
+
+		switch string(mode) {
+		case "100644":
+			entry.entryMode = EntryModeBlob
+		case "100755":
+			entry.entryMode = EntryModeExec
+		case "120000":
+			entry.entryMode = EntryModeSymlink
+		case "160000":
+			entry.entryMode = EntryModeCommit
+		case "40000", "40755": // git uses 40000 for tree object, but some users may get 40755 for unknown reasons
+			entry.entryMode = EntryModeTree
+		default:
+			log.Debug("Unknown mode: %v", string(mode))
+			return nil, fmt.Errorf("unknown mode: %v", string(mode))
+		}
+
+		entry.ID = objectFormat.MustID(sha)
+		entry.name = string(fname)
+		entries = append(entries, entry)
+	}
+	if _, err := rd.Discard(1); err != nil {
+		return entries, err
+	}
+
+	return entries, nil
+}