mirror of
https://github.com/go-gitea/gitea
synced 2024-11-25 10:32:46 +01:00
60c5339042
* Graceful: Create callbacks to with contexts * Graceful: Say when Gitea is completely finished * Graceful: Git and Process within HammerTime Force all git commands to terminate at HammerTime Force all process commands to terminate at HammerTime Move almost all git processes to run as git Commands * Graceful: Always Hammer after Shutdown * ProcessManager: Add cancel functionality * Fix tests * Make sure that process.Manager.Kill() cancels * Make threadsafe access to Processes and remove own unused Kill * Remove cmd from the process manager as it is no longer used * the default context is the correct context * get rid of double till
132 lines
2.7 KiB
Go
132 lines
2.7 KiB
Go
// Copyright 2019 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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package git
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import (
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"bufio"
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"context"
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"fmt"
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"io"
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"os"
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"os/exec"
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"regexp"
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"code.gitea.io/gitea/modules/process"
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)
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// BlamePart represents block of blame - continuous lines with one sha
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type BlamePart struct {
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Sha string
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Lines []string
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}
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// BlameReader returns part of file blame one by one
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type BlameReader struct {
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cmd *exec.Cmd
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pid int64
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output io.ReadCloser
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scanner *bufio.Scanner
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lastSha *string
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cancel context.CancelFunc
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}
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var shaLineRegex = regexp.MustCompile("^([a-z0-9]{40})")
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// NextPart returns next part of blame (sequencial code lines with the same commit)
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func (r *BlameReader) NextPart() (*BlamePart, error) {
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var blamePart *BlamePart
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scanner := r.scanner
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if r.lastSha != nil {
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blamePart = &BlamePart{*r.lastSha, make([]string, 0)}
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}
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for scanner.Scan() {
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line := scanner.Text()
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// Skip empty lines
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if len(line) == 0 {
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continue
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}
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lines := shaLineRegex.FindStringSubmatch(line)
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if lines != nil {
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sha1 := lines[1]
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if blamePart == nil {
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blamePart = &BlamePart{sha1, make([]string, 0)}
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}
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if blamePart.Sha != sha1 {
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r.lastSha = &sha1
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return blamePart, nil
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}
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} else if line[0] == '\t' {
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code := line[1:]
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blamePart.Lines = append(blamePart.Lines, code)
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}
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}
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r.lastSha = nil
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return blamePart, nil
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}
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// Close BlameReader - don't run NextPart after invoking that
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func (r *BlameReader) Close() error {
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defer process.GetManager().Remove(r.pid)
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defer r.cancel()
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if err := r.cmd.Wait(); err != nil {
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return fmt.Errorf("Wait: %v", err)
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}
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return nil
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}
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// CreateBlameReader creates reader for given repository, commit and file
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func CreateBlameReader(repoPath, commitID, file string) (*BlameReader, error) {
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gitRepo, err := OpenRepository(repoPath)
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if err != nil {
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return nil, err
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}
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gitRepo.Close()
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return createBlameReader(repoPath, GitExecutable, "blame", commitID, "--porcelain", "--", file)
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}
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func createBlameReader(dir string, command ...string) (*BlameReader, error) {
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// FIXME: graceful: This should have a timeout
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ctx, cancel := context.WithCancel(DefaultContext)
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cmd := exec.CommandContext(ctx, command[0], command[1:]...)
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cmd.Dir = dir
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cmd.Stderr = os.Stderr
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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defer cancel()
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return nil, fmt.Errorf("StdoutPipe: %v", err)
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}
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if err = cmd.Start(); err != nil {
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defer cancel()
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return nil, fmt.Errorf("Start: %v", err)
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}
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pid := process.GetManager().Add(fmt.Sprintf("GetBlame [repo_path: %s]", dir), cancel)
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scanner := bufio.NewScanner(stdout)
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return &BlameReader{
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cmd,
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pid,
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stdout,
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scanner,
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nil,
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cancel,
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}, nil
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}
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