forgejo/services/gitdiff/gitdiff.go
zeripath 60c5339042 Graceful: Cancel Process on monitor pages & HammerTime (#9213)
* 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
2019-11-30 16:40:22 +02:00

988 lines
27 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package gitdiff
import (
"bufio"
"bytes"
"context"
"fmt"
"html"
"html/template"
"io"
"io/ioutil"
"net/url"
"os"
"os/exec"
"regexp"
"sort"
"strconv"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/charset"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/highlight"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"github.com/sergi/go-diff/diffmatchpatch"
"github.com/unknwon/com"
stdcharset "golang.org/x/net/html/charset"
"golang.org/x/text/transform"
)
// DiffLineType represents the type of a DiffLine.
type DiffLineType uint8
// DiffLineType possible values.
const (
DiffLinePlain DiffLineType = iota + 1
DiffLineAdd
DiffLineDel
DiffLineSection
)
// DiffFileType represents the type of a DiffFile.
type DiffFileType uint8
// DiffFileType possible values.
const (
DiffFileAdd DiffFileType = iota + 1
DiffFileChange
DiffFileDel
DiffFileRename
)
// DiffLineExpandDirection represents the DiffLineSection expand direction
type DiffLineExpandDirection uint8
// DiffLineExpandDirection possible values.
const (
DiffLineExpandNone DiffLineExpandDirection = iota + 1
DiffLineExpandSingle
DiffLineExpandUpDown
DiffLineExpandUp
DiffLineExpandDown
)
// DiffLine represents a line difference in a DiffSection.
type DiffLine struct {
LeftIdx int
RightIdx int
Type DiffLineType
Content string
Comments []*models.Comment
SectionInfo *DiffLineSectionInfo
}
// DiffLineSectionInfo represents diff line section meta data
type DiffLineSectionInfo struct {
Path string
LastLeftIdx int
LastRightIdx int
LeftIdx int
RightIdx int
LeftHunkSize int
RightHunkSize int
}
// BlobExceprtChunkSize represent max lines of excerpt
const BlobExceprtChunkSize = 20
// GetType returns the type of a DiffLine.
func (d *DiffLine) GetType() int {
return int(d.Type)
}
// CanComment returns whether or not a line can get commented
func (d *DiffLine) CanComment() bool {
return len(d.Comments) == 0 && d.Type != DiffLineSection
}
// GetCommentSide returns the comment side of the first comment, if not set returns empty string
func (d *DiffLine) GetCommentSide() string {
if len(d.Comments) == 0 {
return ""
}
return d.Comments[0].DiffSide()
}
// GetLineTypeMarker returns the line type marker
func (d *DiffLine) GetLineTypeMarker() string {
if strings.IndexByte(" +-", d.Content[0]) > -1 {
return d.Content[0:1]
}
return ""
}
// GetBlobExcerptQuery builds query string to get blob excerpt
func (d *DiffLine) GetBlobExcerptQuery() string {
query := fmt.Sprintf(
"last_left=%d&last_right=%d&"+
"left=%d&right=%d&"+
"left_hunk_size=%d&right_hunk_size=%d&"+
"path=%s",
d.SectionInfo.LastLeftIdx, d.SectionInfo.LastRightIdx,
d.SectionInfo.LeftIdx, d.SectionInfo.RightIdx,
d.SectionInfo.LeftHunkSize, d.SectionInfo.RightHunkSize,
url.QueryEscape(d.SectionInfo.Path))
return query
}
// GetExpandDirection gets DiffLineExpandDirection
func (d *DiffLine) GetExpandDirection() DiffLineExpandDirection {
if d.Type != DiffLineSection || d.SectionInfo == nil || d.SectionInfo.RightIdx-d.SectionInfo.LastRightIdx <= 1 {
return DiffLineExpandNone
}
if d.SectionInfo.LastLeftIdx <= 0 && d.SectionInfo.LastRightIdx <= 0 {
return DiffLineExpandUp
} else if d.SectionInfo.RightIdx-d.SectionInfo.LastRightIdx > BlobExceprtChunkSize && d.SectionInfo.RightHunkSize > 0 {
return DiffLineExpandUpDown
} else if d.SectionInfo.LeftHunkSize <= 0 && d.SectionInfo.RightHunkSize <= 0 {
return DiffLineExpandDown
}
return DiffLineExpandSingle
}
func getDiffLineSectionInfo(curFile *DiffFile, line string, lastLeftIdx, lastRightIdx int) *DiffLineSectionInfo {
var (
leftLine int
leftHunk int
rightLine int
righHunk int
)
ss := strings.Split(line, "@@")
ranges := strings.Split(ss[1][1:], " ")
leftRange := strings.Split(ranges[0], ",")
leftLine, _ = com.StrTo(leftRange[0][1:]).Int()
if len(leftRange) > 1 {
leftHunk, _ = com.StrTo(leftRange[1]).Int()
}
if len(ranges) > 1 {
rightRange := strings.Split(ranges[1], ",")
rightLine, _ = com.StrTo(rightRange[0]).Int()
if len(rightRange) > 1 {
righHunk, _ = com.StrTo(rightRange[1]).Int()
}
} else {
log.Warn("Parse line number failed: %v", line)
rightLine = leftLine
righHunk = leftHunk
}
return &DiffLineSectionInfo{
Path: curFile.Name,
LastLeftIdx: lastLeftIdx,
LastRightIdx: lastRightIdx,
LeftIdx: leftLine,
RightIdx: rightLine,
LeftHunkSize: leftHunk,
RightHunkSize: righHunk,
}
}
// escape a line's content or return <br> needed for copy/paste purposes
func getLineContent(content string) string {
if len(content) > 0 {
return html.EscapeString(content)
}
return "<br>"
}
// DiffSection represents a section of a DiffFile.
type DiffSection struct {
Name string
Lines []*DiffLine
}
var (
addedCodePrefix = []byte(`<span class="added-code">`)
removedCodePrefix = []byte(`<span class="removed-code">`)
codeTagSuffix = []byte(`</span>`)
)
func diffToHTML(diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
buf := bytes.NewBuffer(nil)
for i := range diffs {
switch {
case diffs[i].Type == diffmatchpatch.DiffInsert && lineType == DiffLineAdd:
buf.Write(addedCodePrefix)
buf.WriteString(getLineContent(diffs[i].Text))
buf.Write(codeTagSuffix)
case diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel:
buf.Write(removedCodePrefix)
buf.WriteString(getLineContent(diffs[i].Text))
buf.Write(codeTagSuffix)
case diffs[i].Type == diffmatchpatch.DiffEqual:
buf.WriteString(getLineContent(diffs[i].Text))
}
}
return template.HTML(buf.Bytes())
}
// GetLine gets a specific line by type (add or del) and file line number
func (diffSection *DiffSection) GetLine(lineType DiffLineType, idx int) *DiffLine {
var (
difference = 0
addCount = 0
delCount = 0
matchDiffLine *DiffLine
)
LOOP:
for _, diffLine := range diffSection.Lines {
switch diffLine.Type {
case DiffLineAdd:
addCount++
case DiffLineDel:
delCount++
default:
if matchDiffLine != nil {
break LOOP
}
difference = diffLine.RightIdx - diffLine.LeftIdx
addCount = 0
delCount = 0
}
switch lineType {
case DiffLineDel:
if diffLine.RightIdx == 0 && diffLine.LeftIdx == idx-difference {
matchDiffLine = diffLine
}
case DiffLineAdd:
if diffLine.LeftIdx == 0 && diffLine.RightIdx == idx+difference {
matchDiffLine = diffLine
}
}
}
if addCount == delCount {
return matchDiffLine
}
return nil
}
var diffMatchPatch = diffmatchpatch.New()
func init() {
diffMatchPatch.DiffEditCost = 100
}
// GetComputedInlineDiffFor computes inline diff for the given line.
func (diffSection *DiffSection) GetComputedInlineDiffFor(diffLine *DiffLine) template.HTML {
if setting.Git.DisableDiffHighlight {
return template.HTML(getLineContent(diffLine.Content[1:]))
}
var (
compareDiffLine *DiffLine
diff1 string
diff2 string
)
// try to find equivalent diff line. ignore, otherwise
switch diffLine.Type {
case DiffLineAdd:
compareDiffLine = diffSection.GetLine(DiffLineDel, diffLine.RightIdx)
if compareDiffLine == nil {
return template.HTML(getLineContent(diffLine.Content[1:]))
}
diff1 = compareDiffLine.Content
diff2 = diffLine.Content
case DiffLineDel:
compareDiffLine = diffSection.GetLine(DiffLineAdd, diffLine.LeftIdx)
if compareDiffLine == nil {
return template.HTML(getLineContent(diffLine.Content[1:]))
}
diff1 = diffLine.Content
diff2 = compareDiffLine.Content
default:
if strings.IndexByte(" +-", diffLine.Content[0]) > -1 {
return template.HTML(getLineContent(diffLine.Content[1:]))
}
return template.HTML(getLineContent(diffLine.Content))
}
diffRecord := diffMatchPatch.DiffMain(diff1[1:], diff2[1:], true)
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
return diffToHTML(diffRecord, diffLine.Type)
}
// DiffFile represents a file diff.
type DiffFile struct {
Name string
OldName string
Index int
Addition, Deletion int
Type DiffFileType
IsCreated bool
IsDeleted bool
IsBin bool
IsLFSFile bool
IsRenamed bool
IsSubmodule bool
Sections []*DiffSection
IsIncomplete bool
}
// GetType returns type of diff file.
func (diffFile *DiffFile) GetType() int {
return int(diffFile.Type)
}
// GetHighlightClass returns highlight class for a filename.
func (diffFile *DiffFile) GetHighlightClass() string {
return highlight.FileNameToHighlightClass(diffFile.Name)
}
// GetTailSection creates a fake DiffLineSection if the last section is not the end of the file
func (diffFile *DiffFile) GetTailSection(gitRepo *git.Repository, leftCommitID, rightCommitID string) *DiffSection {
if diffFile.Type != DiffFileChange || diffFile.IsBin || diffFile.IsLFSFile {
return nil
}
leftCommit, err := gitRepo.GetCommit(leftCommitID)
if err != nil {
return nil
}
rightCommit, err := gitRepo.GetCommit(rightCommitID)
if err != nil {
return nil
}
lastSection := diffFile.Sections[len(diffFile.Sections)-1]
lastLine := lastSection.Lines[len(lastSection.Lines)-1]
leftLineCount := getCommitFileLineCount(leftCommit, diffFile.Name)
rightLineCount := getCommitFileLineCount(rightCommit, diffFile.Name)
if leftLineCount <= lastLine.LeftIdx || rightLineCount <= lastLine.RightIdx {
return nil
}
tailDiffLine := &DiffLine{
Type: DiffLineSection,
Content: " ",
SectionInfo: &DiffLineSectionInfo{
Path: diffFile.Name,
LastLeftIdx: lastLine.LeftIdx,
LastRightIdx: lastLine.RightIdx,
LeftIdx: leftLineCount,
RightIdx: rightLineCount,
}}
tailSection := &DiffSection{Lines: []*DiffLine{tailDiffLine}}
return tailSection
}
func getCommitFileLineCount(commit *git.Commit, filePath string) int {
blob, err := commit.GetBlobByPath(filePath)
if err != nil {
return 0
}
lineCount, err := blob.GetBlobLineCount()
if err != nil {
return 0
}
return lineCount
}
// Diff represents a difference between two git trees.
type Diff struct {
TotalAddition, TotalDeletion int
Files []*DiffFile
IsIncomplete bool
}
// LoadComments loads comments into each line
func (diff *Diff) LoadComments(issue *models.Issue, currentUser *models.User) error {
allComments, err := models.FetchCodeComments(issue, currentUser)
if err != nil {
return err
}
for _, file := range diff.Files {
if lineCommits, ok := allComments[file.Name]; ok {
for _, section := range file.Sections {
for _, line := range section.Lines {
if comments, ok := lineCommits[int64(line.LeftIdx*-1)]; ok {
line.Comments = append(line.Comments, comments...)
}
if comments, ok := lineCommits[int64(line.RightIdx)]; ok {
line.Comments = append(line.Comments, comments...)
}
sort.SliceStable(line.Comments, func(i, j int) bool {
return line.Comments[i].CreatedUnix < line.Comments[j].CreatedUnix
})
}
}
}
}
return nil
}
// NumFiles returns number of files changes in a diff.
func (diff *Diff) NumFiles() int {
return len(diff.Files)
}
// Example: @@ -1,8 +1,9 @@ => [..., 1, 8, 1, 9]
var hunkRegex = regexp.MustCompile(`^@@ -(?P<beginOld>[0-9]+)(,(?P<endOld>[0-9]+))? \+(?P<beginNew>[0-9]+)(,(?P<endNew>[0-9]+))? @@`)
func isHeader(lof string) bool {
return strings.HasPrefix(lof, cmdDiffHead) || strings.HasPrefix(lof, "---") || strings.HasPrefix(lof, "+++")
}
// CutDiffAroundLine cuts a diff of a file in way that only the given line + numberOfLine above it will be shown
// it also recalculates hunks and adds the appropriate headers to the new diff.
// Warning: Only one-file diffs are allowed.
func CutDiffAroundLine(originalDiff io.Reader, line int64, old bool, numbersOfLine int) string {
if line == 0 || numbersOfLine == 0 {
// no line or num of lines => no diff
return ""
}
scanner := bufio.NewScanner(originalDiff)
hunk := make([]string, 0)
// begin is the start of the hunk containing searched line
// end is the end of the hunk ...
// currentLine is the line number on the side of the searched line (differentiated by old)
// otherLine is the line number on the opposite side of the searched line (differentiated by old)
var begin, end, currentLine, otherLine int64
var headerLines int
for scanner.Scan() {
lof := scanner.Text()
// Add header to enable parsing
if isHeader(lof) {
hunk = append(hunk, lof)
headerLines++
}
if currentLine > line {
break
}
// Detect "hunk" with contains commented lof
if strings.HasPrefix(lof, "@@") {
// Already got our hunk. End of hunk detected!
if len(hunk) > headerLines {
break
}
// A map with named groups of our regex to recognize them later more easily
submatches := hunkRegex.FindStringSubmatch(lof)
groups := make(map[string]string)
for i, name := range hunkRegex.SubexpNames() {
if i != 0 && name != "" {
groups[name] = submatches[i]
}
}
if old {
begin = com.StrTo(groups["beginOld"]).MustInt64()
end = com.StrTo(groups["endOld"]).MustInt64()
// init otherLine with begin of opposite side
otherLine = com.StrTo(groups["beginNew"]).MustInt64()
} else {
begin = com.StrTo(groups["beginNew"]).MustInt64()
if groups["endNew"] != "" {
end = com.StrTo(groups["endNew"]).MustInt64()
} else {
end = 0
}
// init otherLine with begin of opposite side
otherLine = com.StrTo(groups["beginOld"]).MustInt64()
}
end += begin // end is for real only the number of lines in hunk
// lof is between begin and end
if begin <= line && end >= line {
hunk = append(hunk, lof)
currentLine = begin
continue
}
} else if len(hunk) > headerLines {
hunk = append(hunk, lof)
// Count lines in context
switch lof[0] {
case '+':
if !old {
currentLine++
} else {
otherLine++
}
case '-':
if old {
currentLine++
} else {
otherLine++
}
default:
currentLine++
otherLine++
}
}
}
// No hunk found
if currentLine == 0 {
return ""
}
// headerLines + hunkLine (1) = totalNonCodeLines
if len(hunk)-headerLines-1 <= numbersOfLine {
// No need to cut the hunk => return existing hunk
return strings.Join(hunk, "\n")
}
var oldBegin, oldNumOfLines, newBegin, newNumOfLines int64
if old {
oldBegin = currentLine
newBegin = otherLine
} else {
oldBegin = otherLine
newBegin = currentLine
}
// headers + hunk header
newHunk := make([]string, headerLines)
// transfer existing headers
copy(newHunk, hunk[:headerLines])
// transfer last n lines
newHunk = append(newHunk, hunk[len(hunk)-numbersOfLine-1:]...)
// calculate newBegin, ... by counting lines
for i := len(hunk) - 1; i >= len(hunk)-numbersOfLine; i-- {
switch hunk[i][0] {
case '+':
newBegin--
newNumOfLines++
case '-':
oldBegin--
oldNumOfLines++
default:
oldBegin--
newBegin--
newNumOfLines++
oldNumOfLines++
}
}
// construct the new hunk header
newHunk[headerLines] = fmt.Sprintf("@@ -%d,%d +%d,%d @@",
oldBegin, oldNumOfLines, newBegin, newNumOfLines)
return strings.Join(newHunk, "\n")
}
const cmdDiffHead = "diff --git "
// ParsePatch builds a Diff object from a io.Reader and some
// parameters.
// TODO: move this function to gogits/git-module
func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*Diff, error) {
var (
diff = &Diff{Files: make([]*DiffFile, 0)}
curFile = &DiffFile{}
curSection = &DiffSection{
Lines: make([]*DiffLine, 0, 10),
}
leftLine, rightLine int
lineCount int
curFileLinesCount int
curFileLFSPrefix bool
)
input := bufio.NewReader(reader)
isEOF := false
for !isEOF {
var linebuf bytes.Buffer
for {
b, err := input.ReadByte()
if err != nil {
if err == io.EOF {
isEOF = true
break
} else {
return nil, fmt.Errorf("ReadByte: %v", err)
}
}
if b == '\n' {
break
}
if linebuf.Len() < maxLineCharacters {
linebuf.WriteByte(b)
} else if linebuf.Len() == maxLineCharacters {
curFile.IsIncomplete = true
}
}
line := linebuf.String()
if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") || len(line) == 0 {
continue
}
trimLine := strings.Trim(line, "+- ")
if trimLine == models.LFSMetaFileIdentifier {
curFileLFSPrefix = true
}
if curFileLFSPrefix && strings.HasPrefix(trimLine, models.LFSMetaFileOidPrefix) {
oid := strings.TrimPrefix(trimLine, models.LFSMetaFileOidPrefix)
if len(oid) == 64 {
m := &models.LFSMetaObject{Oid: oid}
count, err := models.Count(m)
if err == nil && count > 0 {
curFile.IsBin = true
curFile.IsLFSFile = true
curSection.Lines = nil
}
}
}
curFileLinesCount++
lineCount++
// Diff data too large, we only show the first about maxLines lines
if curFileLinesCount >= maxLines {
curFile.IsIncomplete = true
}
switch {
case line[0] == ' ':
diffLine := &DiffLine{Type: DiffLinePlain, Content: line, LeftIdx: leftLine, RightIdx: rightLine}
leftLine++
rightLine++
curSection.Lines = append(curSection.Lines, diffLine)
continue
case line[0] == '@':
curSection = &DiffSection{}
curFile.Sections = append(curFile.Sections, curSection)
lineSectionInfo := getDiffLineSectionInfo(curFile, line, leftLine-1, rightLine-1)
diffLine := &DiffLine{
Type: DiffLineSection,
Content: line,
SectionInfo: lineSectionInfo,
}
curSection.Lines = append(curSection.Lines, diffLine)
// update line number.
leftLine = lineSectionInfo.LeftIdx
rightLine = lineSectionInfo.RightIdx
continue
case line[0] == '+':
curFile.Addition++
diff.TotalAddition++
diffLine := &DiffLine{Type: DiffLineAdd, Content: line, RightIdx: rightLine}
rightLine++
curSection.Lines = append(curSection.Lines, diffLine)
continue
case line[0] == '-':
curFile.Deletion++
diff.TotalDeletion++
diffLine := &DiffLine{Type: DiffLineDel, Content: line, LeftIdx: leftLine}
if leftLine > 0 {
leftLine++
}
curSection.Lines = append(curSection.Lines, diffLine)
case strings.HasPrefix(line, "Binary"):
curFile.IsBin = true
continue
}
// Get new file.
if strings.HasPrefix(line, cmdDiffHead) {
if len(diff.Files) >= maxFiles {
diff.IsIncomplete = true
_, err := io.Copy(ioutil.Discard, reader)
if err != nil {
return nil, fmt.Errorf("Copy: %v", err)
}
break
}
var middle int
// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
// e.g. diff --git "a/xxx" "b/xxx"
hasQuote := line[len(cmdDiffHead)] == '"'
if hasQuote {
middle = strings.Index(line, ` "b/`)
} else {
middle = strings.Index(line, " b/")
}
beg := len(cmdDiffHead)
a := line[beg+2 : middle]
b := line[middle+3:]
if hasQuote {
// Keep the entire string in double quotes for now
a = line[beg:middle]
b = line[middle+1:]
var err error
a, err = strconv.Unquote(a)
if err != nil {
return nil, fmt.Errorf("Unquote: %v", err)
}
b, err = strconv.Unquote(b)
if err != nil {
return nil, fmt.Errorf("Unquote: %v", err)
}
// Now remove the /a /b
a = a[2:]
b = b[2:]
}
curFile = &DiffFile{
Name: b,
OldName: a,
Index: len(diff.Files) + 1,
Type: DiffFileChange,
Sections: make([]*DiffSection, 0, 10),
IsRenamed: a != b,
}
diff.Files = append(diff.Files, curFile)
curFileLinesCount = 0
leftLine = 1
rightLine = 1
curFileLFSPrefix = false
// Check file diff type and is submodule.
for {
line, err := input.ReadString('\n')
if err != nil {
if err == io.EOF {
isEOF = true
} else {
return nil, fmt.Errorf("ReadString: %v", err)
}
}
switch {
case strings.HasPrefix(line, "new file"):
curFile.Type = DiffFileAdd
curFile.IsCreated = true
case strings.HasPrefix(line, "deleted"):
curFile.Type = DiffFileDel
curFile.IsDeleted = true
case strings.HasPrefix(line, "index"):
curFile.Type = DiffFileChange
case strings.HasPrefix(line, "similarity index 100%"):
curFile.Type = DiffFileRename
}
if curFile.Type > 0 {
if strings.HasSuffix(line, " 160000\n") {
curFile.IsSubmodule = true
}
break
}
}
}
}
// FIXME: detect encoding while parsing.
var buf bytes.Buffer
for _, f := range diff.Files {
buf.Reset()
for _, sec := range f.Sections {
for _, l := range sec.Lines {
buf.WriteString(l.Content)
buf.WriteString("\n")
}
}
charsetLabel, err := charset.DetectEncoding(buf.Bytes())
if charsetLabel != "UTF-8" && err == nil {
encoding, _ := stdcharset.Lookup(charsetLabel)
if encoding != nil {
d := encoding.NewDecoder()
for _, sec := range f.Sections {
for _, l := range sec.Lines {
if c, _, err := transform.String(d, l.Content); err == nil {
l.Content = c
}
}
}
}
}
}
return diff, nil
}
// GetDiffRange builds a Diff between two commits of a repository.
// passing the empty string as beforeCommitID returns a diff from the
// parent commit.
func GetDiffRange(repoPath, beforeCommitID, afterCommitID string, maxLines, maxLineCharacters, maxFiles int) (*Diff, error) {
return GetDiffRangeWithWhitespaceBehavior(repoPath, beforeCommitID, afterCommitID, maxLines, maxLineCharacters, maxFiles, "")
}
// GetDiffRangeWithWhitespaceBehavior builds a Diff between two commits of a repository.
// Passing the empty string as beforeCommitID returns a diff from the parent commit.
// The whitespaceBehavior is either an empty string or a git flag
func GetDiffRangeWithWhitespaceBehavior(repoPath, beforeCommitID, afterCommitID string, maxLines, maxLineCharacters, maxFiles int, whitespaceBehavior string) (*Diff, error) {
gitRepo, err := git.OpenRepository(repoPath)
if err != nil {
return nil, err
}
defer gitRepo.Close()
commit, err := gitRepo.GetCommit(afterCommitID)
if err != nil {
return nil, err
}
// FIXME: graceful: These commands should likely have a timeout
ctx, cancel := context.WithCancel(git.DefaultContext)
defer cancel()
var cmd *exec.Cmd
if len(beforeCommitID) == 0 && commit.ParentCount() == 0 {
cmd = exec.CommandContext(ctx, git.GitExecutable, "show", afterCommitID)
} else {
actualBeforeCommitID := beforeCommitID
if len(actualBeforeCommitID) == 0 {
parentCommit, _ := commit.Parent(0)
actualBeforeCommitID = parentCommit.ID.String()
}
diffArgs := []string{"diff", "-M"}
if len(whitespaceBehavior) != 0 {
diffArgs = append(diffArgs, whitespaceBehavior)
}
diffArgs = append(diffArgs, actualBeforeCommitID)
diffArgs = append(diffArgs, afterCommitID)
cmd = exec.CommandContext(ctx, git.GitExecutable, diffArgs...)
beforeCommitID = actualBeforeCommitID
}
cmd.Dir = repoPath
cmd.Stderr = os.Stderr
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("StdoutPipe: %v", err)
}
if err = cmd.Start(); err != nil {
return nil, fmt.Errorf("Start: %v", err)
}
pid := process.GetManager().Add(fmt.Sprintf("GetDiffRange [repo_path: %s]", repoPath), cancel)
defer process.GetManager().Remove(pid)
diff, err := ParsePatch(maxLines, maxLineCharacters, maxFiles, stdout)
if err != nil {
return nil, fmt.Errorf("ParsePatch: %v", err)
}
for _, diffFile := range diff.Files {
tailSection := diffFile.GetTailSection(gitRepo, beforeCommitID, afterCommitID)
if tailSection != nil {
diffFile.Sections = append(diffFile.Sections, tailSection)
}
}
if err = cmd.Wait(); err != nil {
return nil, fmt.Errorf("Wait: %v", err)
}
return diff, nil
}
// RawDiffType type of a raw diff.
type RawDiffType string
// RawDiffType possible values.
const (
RawDiffNormal RawDiffType = "diff"
RawDiffPatch RawDiffType = "patch"
)
// GetRawDiff dumps diff results of repository in given commit ID to io.Writer.
// TODO: move this function to gogits/git-module
func GetRawDiff(repoPath, commitID string, diffType RawDiffType, writer io.Writer) error {
return GetRawDiffForFile(repoPath, "", commitID, diffType, "", writer)
}
// GetRawDiffForFile dumps diff results of file in given commit ID to io.Writer.
// TODO: move this function to gogits/git-module
func GetRawDiffForFile(repoPath, startCommit, endCommit string, diffType RawDiffType, file string, writer io.Writer) error {
repo, err := git.OpenRepository(repoPath)
if err != nil {
return fmt.Errorf("OpenRepository: %v", err)
}
defer repo.Close()
commit, err := repo.GetCommit(endCommit)
if err != nil {
return fmt.Errorf("GetCommit: %v", err)
}
fileArgs := make([]string, 0)
if len(file) > 0 {
fileArgs = append(fileArgs, "--", file)
}
// FIXME: graceful: These commands should have a timeout
ctx, cancel := context.WithCancel(git.DefaultContext)
defer cancel()
var cmd *exec.Cmd
switch diffType {
case RawDiffNormal:
if len(startCommit) != 0 {
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"diff", "-M", startCommit, endCommit}, fileArgs...)...)
} else if commit.ParentCount() == 0 {
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"show", endCommit}, fileArgs...)...)
} else {
c, _ := commit.Parent(0)
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"diff", "-M", c.ID.String(), endCommit}, fileArgs...)...)
}
case RawDiffPatch:
if len(startCommit) != 0 {
query := fmt.Sprintf("%s...%s", endCommit, startCommit)
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"format-patch", "--no-signature", "--stdout", "--root", query}, fileArgs...)...)
} else if commit.ParentCount() == 0 {
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"format-patch", "--no-signature", "--stdout", "--root", endCommit}, fileArgs...)...)
} else {
c, _ := commit.Parent(0)
query := fmt.Sprintf("%s...%s", endCommit, c.ID.String())
cmd = exec.CommandContext(ctx, git.GitExecutable, append([]string{"format-patch", "--no-signature", "--stdout", query}, fileArgs...)...)
}
default:
return fmt.Errorf("invalid diffType: %s", diffType)
}
stderr := new(bytes.Buffer)
cmd.Dir = repoPath
cmd.Stdout = writer
cmd.Stderr = stderr
pid := process.GetManager().Add(fmt.Sprintf("GetRawDiffForFile: [repo_path: %s]", repoPath), cancel)
defer process.GetManager().Remove(pid)
if err = cmd.Run(); err != nil {
return fmt.Errorf("Run: %v - %s", err, stderr)
}
return nil
}
// GetDiffCommit builds a Diff representing the given commitID.
func GetDiffCommit(repoPath, commitID string, maxLines, maxLineCharacters, maxFiles int) (*Diff, error) {
return GetDiffRange(repoPath, "", commitID, maxLines, maxLineCharacters, maxFiles)
}
// CommentAsDiff returns c.Patch as *Diff
func CommentAsDiff(c *models.Comment) (*Diff, error) {
diff, err := ParsePatch(setting.Git.MaxGitDiffLines,
setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, strings.NewReader(c.Patch))
if err != nil {
return nil, err
}
if len(diff.Files) == 0 {
return nil, fmt.Errorf("no file found for comment ID: %d", c.ID)
}
secs := diff.Files[0].Sections
if len(secs) == 0 {
return nil, fmt.Errorf("no sections found for comment ID: %d", c.ID)
}
return diff, nil
}
// CommentMustAsDiff executes AsDiff and logs the error instead of returning
func CommentMustAsDiff(c *models.Comment) *Diff {
diff, err := CommentAsDiff(c)
if err != nil {
log.Warn("CommentMustAsDiff: %v", err)
}
return diff
}