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https://github.com/go-gitea/gitea.git
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a1f1bccd7a
* Implemented calling git diff-tree * Ensures wrapper function is called with valid arguments * Parses output into go struct, using strong typing when possible
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
// Copyright 2024 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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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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"code.gitea.io/gitea/modules/optional"
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)
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var sepSpace = []byte{' '}
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type LsTreeEntry struct {
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ID ObjectID
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EntryMode EntryMode
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Name string
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Size optional.Option[int64]
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}
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func parseLsTreeLine(line []byte) (*LsTreeEntry, error) {
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// expect line to be of the form:
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// <mode> <type> <sha> <space-padded-size>\t<filename>
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// <mode> <type> <sha>\t<filename>
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var err error
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posTab := bytes.IndexByte(line, '\t')
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if posTab == -1 {
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return nil, fmt.Errorf("invalid ls-tree output (no tab): %q", line)
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}
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entry := new(LsTreeEntry)
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entryAttrs := line[:posTab]
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entryName := line[posTab+1:]
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entryMode, entryAttrs, _ := bytes.Cut(entryAttrs, sepSpace)
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_ /* entryType */, entryAttrs, _ = bytes.Cut(entryAttrs, sepSpace) // the type is not used, the mode is enough to determine the type
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entryObjectID, entryAttrs, _ := bytes.Cut(entryAttrs, sepSpace)
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if len(entryAttrs) > 0 {
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entrySize := entryAttrs // the last field is the space-padded-size
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size, _ := strconv.ParseInt(strings.TrimSpace(string(entrySize)), 10, 64)
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entry.Size = optional.Some(size)
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}
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entry.EntryMode, err = ParseEntryMode(string(entryMode))
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if err != nil || entry.EntryMode == EntryModeNoEntry {
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return nil, fmt.Errorf("invalid ls-tree output (invalid mode): %q, err: %w", line, err)
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}
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entry.ID, err = NewIDFromString(string(entryObjectID))
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if err != nil {
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return nil, fmt.Errorf("invalid ls-tree output (invalid object id): %q, err: %w", line, err)
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}
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if len(entryName) > 0 && entryName[0] == '"' {
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entry.Name, err = strconv.Unquote(string(entryName))
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if err != nil {
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return nil, fmt.Errorf("invalid ls-tree output (invalid name): %q, err: %w", line, err)
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}
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} else {
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entry.Name = string(entryName)
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}
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return entry, nil
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}
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