mirror of
https://github.com/go-gitea/gitea
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ae7e6cd474
* Reduce calls to git cat-file -s There are multiple places where there are repeated calls to git cat-file -s due to the blobs not being created with their size. Through judicious use of git ls-tree -l and slight adjustments to the indexer code we can avoid a lot of these calls. * simplify by always expecting the long format * Also always set the sized field and tell the indexer the update is sized
89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
// Copyright 2018 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// +build !gogit
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package git
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import (
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"bytes"
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"fmt"
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"strconv"
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"strings"
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)
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// ParseTreeEntries parses the output of a `git ls-tree -l` command.
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func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
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return parseTreeEntries(data, nil)
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}
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func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
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entries := make([]*TreeEntry, 0, 10)
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for pos := 0; pos < len(data); {
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// expect line to be of the form "<mode> <type> <sha> <space-padded-size>\t<filename>"
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entry := new(TreeEntry)
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entry.ptree = ptree
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if pos+6 > len(data) {
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return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
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}
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switch string(data[pos : pos+6]) {
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case "100644":
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entry.entryMode = EntryModeBlob
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pos += 12 // skip over "100644 blob "
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case "100755":
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entry.entryMode = EntryModeExec
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pos += 12 // skip over "100755 blob "
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case "120000":
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entry.entryMode = EntryModeSymlink
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pos += 12 // skip over "120000 blob "
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case "160000":
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entry.entryMode = EntryModeCommit
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pos += 14 // skip over "160000 object "
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case "040000":
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entry.entryMode = EntryModeTree
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pos += 12 // skip over "040000 tree "
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default:
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return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+6]))
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}
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if pos+40 > len(data) {
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return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
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}
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id, err := NewIDFromString(string(data[pos : pos+40]))
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if err != nil {
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return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
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}
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entry.ID = id
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pos += 41 // skip over sha and trailing space
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end := pos + bytes.IndexByte(data[pos:], '\t')
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if end < pos {
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return nil, fmt.Errorf("Invalid ls-tree -l output: %s", string(data))
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}
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entry.size, _ = strconv.ParseInt(strings.TrimSpace(string(data[pos:end])), 10, 64)
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entry.sized = true
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pos = end + 1
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end = pos + bytes.IndexByte(data[pos:], '\n')
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if end < pos {
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return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
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}
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// In case entry name is surrounded by double quotes(it happens only in git-shell).
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if data[pos] == '"' {
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entry.name, err = strconv.Unquote(string(data[pos:end]))
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if err != nil {
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return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
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}
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} else {
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entry.name = string(data[pos:end])
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}
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pos = end + 1
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entries = append(entries, entry)
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}
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return entries, nil
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}
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