Files
forge/modules/git/attribute/checker.go
zeekayandHanzo Dev aa87442fdd Record upstream authorship centrally in NOTICE instead of in every file header
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the
Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in
NOTICE, alongside LICENSE. The header lint accepts any copyright line above the
SPDX line, so it no longer demands an upstream one.

Co-authored-by: Hanzo Dev <[email protected]>
2026-09-10 17:50:35 -07:00

98 lines
2.9 KiB
Go

// Copyright 2026 Hanzo AI, Inc. All rights reserved.
// SPDX-License-Identifier: MIT
package attribute
import (
"bytes"
"context"
"errors"
"fmt"
"os"
"github.com/hanzoai/git/modules/git"
"github.com/hanzoai/git/modules/git/gitcmd"
)
func checkAttrCommand(gitRepo *git.Repository, treeish string, filenames, attributes []string) (*gitcmd.Command, []string, func(), error) {
cancel := func() {}
envs := []string{"GIT_FLUSH=1"}
cmd := gitcmd.NewCommand("check-attr", "-z")
if len(attributes) == 0 {
cmd.AddArguments("--all")
}
// there is treeish, read from bare repo or temp index created by "read-tree"
if treeish != "" {
if git.DefaultFeatures().SupportCheckAttrOnBare {
cmd.AddArguments("--source")
cmd.AddDynamicArguments(treeish)
} else {
indexFilename, worktree, deleteTemporaryFile, err := gitRepo.ReadTreeToTemporaryIndex(treeish)
if err != nil {
return nil, nil, nil, err
}
cmd.AddArguments("--cached")
envs = append(envs,
"GIT_INDEX_FILE="+indexFilename,
"GIT_WORK_TREE="+worktree,
)
cancel = deleteTemporaryFile
}
} else {
// Read from existing index, in cases where the repo is bare and has an index,
// or the work tree contains unstaged changes that shouldn't affect the attribute check.
// It is caller's responsibility to add changed ".gitattributes" into the index if they want to respect the new changes.
cmd.AddArguments("--cached")
}
cmd.AddDynamicArguments(attributes...)
if len(filenames) > 0 {
cmd.AddDashesAndList(filenames...)
}
return cmd, envs, cancel, nil
}
type CheckAttributeOpts struct {
Filenames []string
Attributes []string
}
// CheckAttributes return the attributes of the given filenames and attributes in the given treeish.
// If treeish is empty, then it will use current working directory, otherwise it will use the provided treeish on the bare repo
func CheckAttributes(ctx context.Context, gitRepo *git.Repository, treeish string, opts CheckAttributeOpts) (map[string]*Attributes, error) {
cmd, envs, cancel, err := checkAttrCommand(gitRepo, treeish, opts.Filenames, opts.Attributes)
if err != nil {
return nil, err
}
defer cancel()
stdout, _, err := cmd.WithEnv(append(os.Environ(), envs...)).
WithDir(gitRepo.Path).
RunStdBytes(ctx)
if err != nil {
return nil, fmt.Errorf("failed to run check-attr: %w", err)
}
fields := bytes.Split(stdout, []byte{'\000'})
if len(fields)%3 != 1 {
return nil, errors.New("wrong number of fields in return from check-attr")
}
attributesMap := make(map[string]*Attributes)
for i := 0; i < (len(fields) / 3); i++ {
filename := string(fields[3*i])
attribute := string(fields[3*i+1])
info := string(fields[3*i+2])
attribute2info, ok := attributesMap[filename]
if !ok {
attribute2info = NewAttributes()
attributesMap[filename] = attribute2info
}
attribute2info.m[attribute] = Attribute(info)
}
return attributesMap, nil
}