mirror of
https://codeberg.org/forgejo/forgejo.git
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cbf923e87b
Refactor Hash interfaces and centralize hash function. This will allow easier introduction of different hash function later on. This forms the "no-op" part of the SHA256 enablement patch.
96 lines
2.8 KiB
Go
96 lines
2.8 KiB
Go
// Copyright 2018 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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//go: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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"github.com/go-git/go-git/v5/plumbing"
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"github.com/go-git/go-git/v5/plumbing/filemode"
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"github.com/go-git/go-git/v5/plumbing/hash"
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"github.com/go-git/go-git/v5/plumbing/object"
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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(h ObjectFormat, 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.gogitTreeEntry = &object.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.gogitTreeEntry.Mode = filemode.Regular
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pos += 12 // skip over "100644 blob "
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case "100755":
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entry.gogitTreeEntry.Mode = filemode.Executable
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pos += 12 // skip over "100755 blob "
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case "120000":
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entry.gogitTreeEntry.Mode = filemode.Symlink
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pos += 12 // skip over "120000 blob "
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case "160000":
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entry.gogitTreeEntry.Mode = filemode.Submodule
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pos += 14 // skip over "160000 object "
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case "040000":
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entry.gogitTreeEntry.Mode = filemode.Dir
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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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// in hex format, not byte format ....
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if pos+hash.Size*2 > 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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var err error
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entry.ID, err = IDFromString(string(data[pos : pos+hash.Size*2]))
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if err != nil {
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return nil, fmt.Errorf("invalid ls-tree output: %w", err)
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}
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entry.gogitTreeEntry.Hash = plumbing.Hash(entry.ID.RawValue())
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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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var err error
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entry.gogitTreeEntry.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: %w", err)
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}
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} else {
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entry.gogitTreeEntry.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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