mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-27 22:04:28 -04:00
* Alternative fix for HTML diff entity split This commit both reverts PR #13357 and uses the exiting implementation alredy used for spans to fix the same issue. That PR duplicates most of logic that is already present elsewhere and still was failing for some cases. This should be simpler as it uses the existing logic that already works for <span>s being split apart. Added both test cases as well. * Update gitdiff_test.go * fmt * entity can have uppercase letter, also add detailed comment per @zeripath
986 lines
29 KiB
Go
986 lines
29 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/template"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/url"
|
|
"os"
|
|
"os/exec"
|
|
"regexp"
|
|
"sort"
|
|
"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"
|
|
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
|
|
DiffFileCopy
|
|
)
|
|
|
|
// 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
|
|
}
|
|
|
|
// BlobExcerptChunkSize represent max lines of excerpt
|
|
const BlobExcerptChunkSize = 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 > BlobExcerptChunkSize && d.SectionInfo.RightHunkSize > 0 {
|
|
return DiffLineExpandUpDown
|
|
} else if d.SectionInfo.LeftHunkSize <= 0 && d.SectionInfo.RightHunkSize <= 0 {
|
|
return DiffLineExpandDown
|
|
}
|
|
return DiffLineExpandSingle
|
|
}
|
|
|
|
func getDiffLineSectionInfo(treePath, line string, lastLeftIdx, lastRightIdx int) *DiffLineSectionInfo {
|
|
leftLine, leftHunk, rightLine, righHunk := git.ParseDiffHunkString(line)
|
|
|
|
return &DiffLineSectionInfo{
|
|
Path: treePath,
|
|
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 content
|
|
}
|
|
return "\n"
|
|
}
|
|
|
|
// DiffSection represents a section of a DiffFile.
|
|
type DiffSection struct {
|
|
FileName string
|
|
Name string
|
|
Lines []*DiffLine
|
|
}
|
|
|
|
var (
|
|
addedCodePrefix = []byte(`<span class="added-code">`)
|
|
removedCodePrefix = []byte(`<span class="removed-code">`)
|
|
codeTagSuffix = []byte(`</span>`)
|
|
)
|
|
var trailingSpanRegex = regexp.MustCompile(`<span\s*[[:alpha:]="]*?[>]?$`)
|
|
var entityRegex = regexp.MustCompile(`&[#]*?[0-9[:alpha:]]*$`)
|
|
|
|
// shouldWriteInline represents combinations where we manually write inline changes
|
|
func shouldWriteInline(diff diffmatchpatch.Diff, lineType DiffLineType) bool {
|
|
if true &&
|
|
diff.Type == diffmatchpatch.DiffEqual ||
|
|
diff.Type == diffmatchpatch.DiffInsert && lineType == DiffLineAdd ||
|
|
diff.Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func diffToHTML(fileName string, diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
|
|
buf := bytes.NewBuffer(nil)
|
|
match := ""
|
|
|
|
for _, diff := range diffs {
|
|
if shouldWriteInline(diff, lineType) {
|
|
if len(match) > 0 {
|
|
diff.Text = match + diff.Text
|
|
match = ""
|
|
}
|
|
// Chroma HTML syntax highlighting is done before diffing individual lines in order to maintain consistency.
|
|
// Since inline changes might split in the middle of a chroma span tag or HTML entity, make we manually put it back together
|
|
// before writing so we don't try insert added/removed code spans in the middle of one of those
|
|
// and create broken HTML. This is done by moving incomplete HTML forward until it no longer matches our pattern of
|
|
// a line ending with an incomplete HTML entity or partial/opening <span>.
|
|
|
|
// EX:
|
|
// diffs[{Type: dmp.DiffDelete, Text: "language</span><span "},
|
|
// {Type: dmp.DiffEqual, Text: "c"},
|
|
// {Type: dmp.DiffDelete, Text: "lass="p">}]
|
|
|
|
// After first iteration
|
|
// diffs[{Type: dmp.DiffDelete, Text: "language</span>"}, //write out
|
|
// {Type: dmp.DiffEqual, Text: "<span c"},
|
|
// {Type: dmp.DiffDelete, Text: "lass="p">,</span>}]
|
|
|
|
// After second iteration
|
|
// {Type: dmp.DiffEqual, Text: ""}, // write out
|
|
// {Type: dmp.DiffDelete, Text: "<span class="p">,</span>}]
|
|
|
|
// Final
|
|
// {Type: dmp.DiffDelete, Text: "<span class="p">,</span>}]
|
|
// end up writing <span class="removed-code"><span class="p">,</span></span>
|
|
// Instead of <span class="removed-code">lass="p",</span></span>
|
|
|
|
m := trailingSpanRegex.FindStringSubmatchIndex(diff.Text)
|
|
if m != nil {
|
|
match = diff.Text[m[0]:m[1]]
|
|
diff.Text = strings.TrimSuffix(diff.Text, match)
|
|
}
|
|
m = entityRegex.FindStringSubmatchIndex(diff.Text)
|
|
if m != nil {
|
|
match = diff.Text[m[0]:m[1]]
|
|
diff.Text = strings.TrimSuffix(diff.Text, match)
|
|
}
|
|
// Print an existing closing span first before opening added/remove-code span so it doesn't unintentionally close it
|
|
if strings.HasPrefix(diff.Text, "</span>") {
|
|
buf.WriteString("</span>")
|
|
diff.Text = strings.TrimPrefix(diff.Text, "</span>")
|
|
}
|
|
// If we weren't able to fix it then this should avoid broken HTML by not inserting more spans below
|
|
// The previous/next diff section will contain the rest of the tag that is missing here
|
|
if strings.Count(diff.Text, "<") != strings.Count(diff.Text, ">") {
|
|
buf.WriteString(diff.Text)
|
|
continue
|
|
}
|
|
}
|
|
switch {
|
|
case diff.Type == diffmatchpatch.DiffEqual:
|
|
buf.WriteString(diff.Text)
|
|
case diff.Type == diffmatchpatch.DiffInsert && lineType == DiffLineAdd:
|
|
buf.Write(addedCodePrefix)
|
|
buf.WriteString(diff.Text)
|
|
buf.Write(codeTagSuffix)
|
|
case diff.Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel:
|
|
buf.Write(removedCodePrefix)
|
|
buf.WriteString(diff.Text)
|
|
buf.Write(codeTagSuffix)
|
|
}
|
|
}
|
|
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 DiffLineSection:
|
|
return template.HTML(getLineContent(diffLine.Content[1:]))
|
|
case DiffLineAdd:
|
|
compareDiffLine = diffSection.GetLine(DiffLineDel, diffLine.RightIdx)
|
|
if compareDiffLine == nil {
|
|
return template.HTML(highlight.Code(diffSection.FileName, diffLine.Content[1:]))
|
|
}
|
|
diff1 = compareDiffLine.Content
|
|
diff2 = diffLine.Content
|
|
case DiffLineDel:
|
|
compareDiffLine = diffSection.GetLine(DiffLineAdd, diffLine.LeftIdx)
|
|
if compareDiffLine == nil {
|
|
return template.HTML(highlight.Code(diffSection.FileName, diffLine.Content[1:]))
|
|
}
|
|
diff1 = diffLine.Content
|
|
diff2 = compareDiffLine.Content
|
|
default:
|
|
if strings.IndexByte(" +-", diffLine.Content[0]) > -1 {
|
|
return template.HTML(highlight.Code(diffSection.FileName, diffLine.Content[1:]))
|
|
}
|
|
return template.HTML(highlight.Code(diffSection.FileName, diffLine.Content))
|
|
}
|
|
|
|
diffRecord := diffMatchPatch.DiffMain(highlight.Code(diffSection.FileName, diff1[1:]), highlight.Code(diffSection.FileName, diff2[1:]), true)
|
|
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
|
|
|
|
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
|
|
|
|
return diffToHTML(diffSection.FileName, 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
|
|
IsProtected bool
|
|
}
|
|
|
|
// GetType returns type of diff file.
|
|
func (diffFile *DiffFile) GetType() int {
|
|
return int(diffFile.Type)
|
|
}
|
|
|
|
// 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 len(diffFile.Sections) == 0 || 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{FileName: diffFile.Name, 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 {
|
|
NumFiles, 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
|
|
}
|
|
|
|
const cmdDiffHead = "diff --git "
|
|
|
|
// ParsePatch builds a Diff object from a io.Reader and some parameters.
|
|
func ParsePatch(maxLines, maxLineCharacters, maxFiles int, reader io.Reader) (*Diff, error) {
|
|
var curFile *DiffFile
|
|
|
|
diff := &Diff{Files: make([]*DiffFile, 0)}
|
|
|
|
sb := strings.Builder{}
|
|
|
|
// OK let's set a reasonable buffer size.
|
|
// This should be let's say at least the size of maxLineCharacters or 4096 whichever is larger.
|
|
readerSize := maxLineCharacters
|
|
if readerSize < 4096 {
|
|
readerSize = 4096
|
|
}
|
|
|
|
input := bufio.NewReaderSize(reader, readerSize)
|
|
line, err := input.ReadString('\n')
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
return diff, nil
|
|
}
|
|
return diff, err
|
|
}
|
|
parsingLoop:
|
|
for {
|
|
// 1. A patch file always begins with `diff --git ` + `a/path b/path` (possibly quoted)
|
|
// if it does not we have bad input!
|
|
if !strings.HasPrefix(line, cmdDiffHead) {
|
|
return diff, fmt.Errorf("Invalid first file line: %s", line)
|
|
}
|
|
|
|
// TODO: Handle skipping first n files
|
|
if len(diff.Files) >= maxFiles {
|
|
diff.IsIncomplete = true
|
|
_, err := io.Copy(ioutil.Discard, reader)
|
|
if err != nil {
|
|
// By the definition of io.Copy this never returns io.EOF
|
|
return diff, fmt.Errorf("Copy: %v", err)
|
|
}
|
|
break parsingLoop
|
|
}
|
|
|
|
curFile = createDiffFile(diff, line)
|
|
diff.Files = append(diff.Files, curFile)
|
|
|
|
// 2. It is followed by one or more extended header lines:
|
|
//
|
|
// old mode <mode>
|
|
// new mode <mode>
|
|
// deleted file mode <mode>
|
|
// new file mode <mode>
|
|
// copy from <path>
|
|
// copy to <path>
|
|
// rename from <path>
|
|
// rename to <path>
|
|
// similarity index <number>
|
|
// dissimilarity index <number>
|
|
// index <hash>..<hash> <mode>
|
|
//
|
|
// * <mode> 6-digit octal numbers including the file type and file permission bits.
|
|
// * <path> does not include the a/ and b/ prefixes
|
|
// * <number> percentage of unchanged lines for similarity, percentage of changed
|
|
// lines dissimilarity as integer rounded down with terminal %. 100% => equal files.
|
|
// * The index line includes the blob object names before and after the change.
|
|
// The <mode> is included if the file mode does not change; otherwise, separate
|
|
// lines indicate the old and the new mode.
|
|
// 3. Following this header the "standard unified" diff format header may be encountered: (but not for every case...)
|
|
//
|
|
// --- a/<path>
|
|
// +++ b/<path>
|
|
//
|
|
// With multiple hunks
|
|
//
|
|
// @@ <hunk descriptor> @@
|
|
// +added line
|
|
// -removed line
|
|
// unchanged line
|
|
//
|
|
// 4. Binary files get:
|
|
//
|
|
// Binary files a/<path> and b/<path> differ
|
|
//
|
|
// but one of a/<path> and b/<path> could be /dev/null.
|
|
curFileLoop:
|
|
for {
|
|
line, err = input.ReadString('\n')
|
|
if err != nil {
|
|
if err != io.EOF {
|
|
return diff, err
|
|
}
|
|
break parsingLoop
|
|
}
|
|
switch {
|
|
case strings.HasPrefix(line, cmdDiffHead):
|
|
break curFileLoop
|
|
case strings.HasPrefix(line, "old mode ") ||
|
|
strings.HasPrefix(line, "new mode "):
|
|
if strings.HasSuffix(line, " 160000\n") {
|
|
curFile.IsSubmodule = true
|
|
}
|
|
case strings.HasPrefix(line, "copy from "):
|
|
curFile.IsRenamed = true
|
|
curFile.Type = DiffFileCopy
|
|
case strings.HasPrefix(line, "copy to "):
|
|
curFile.IsRenamed = true
|
|
curFile.Type = DiffFileCopy
|
|
case strings.HasPrefix(line, "new file"):
|
|
curFile.Type = DiffFileAdd
|
|
curFile.IsCreated = true
|
|
if strings.HasSuffix(line, " 160000\n") {
|
|
curFile.IsSubmodule = true
|
|
}
|
|
case strings.HasPrefix(line, "deleted"):
|
|
curFile.Type = DiffFileDel
|
|
curFile.IsDeleted = true
|
|
if strings.HasSuffix(line, " 160000\n") {
|
|
curFile.IsSubmodule = true
|
|
}
|
|
case strings.HasPrefix(line, "index"):
|
|
if strings.HasSuffix(line, " 160000\n") {
|
|
curFile.IsSubmodule = true
|
|
}
|
|
case strings.HasPrefix(line, "similarity index 100%"):
|
|
curFile.Type = DiffFileRename
|
|
case strings.HasPrefix(line, "Binary"):
|
|
curFile.IsBin = true
|
|
case strings.HasPrefix(line, "--- "):
|
|
// Do nothing with this line
|
|
case strings.HasPrefix(line, "+++ "):
|
|
// Do nothing with this line
|
|
lineBytes, isFragment, err := parseHunks(curFile, maxLines, maxLineCharacters, input)
|
|
diff.TotalAddition += curFile.Addition
|
|
diff.TotalDeletion += curFile.Deletion
|
|
if err != nil {
|
|
if err != io.EOF {
|
|
return diff, err
|
|
}
|
|
break parsingLoop
|
|
}
|
|
sb.Reset()
|
|
_, _ = sb.Write(lineBytes)
|
|
for isFragment {
|
|
lineBytes, isFragment, err = input.ReadLine()
|
|
if err != nil {
|
|
// Now by the definition of ReadLine this cannot be io.EOF
|
|
return diff, fmt.Errorf("Unable to ReadLine: %v", err)
|
|
}
|
|
_, _ = sb.Write(lineBytes)
|
|
}
|
|
line = sb.String()
|
|
sb.Reset()
|
|
|
|
break curFileLoop
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// FIXME: There are numerous issues with this:
|
|
// - we might want to consider detecting encoding while parsing but...
|
|
// - we're likely to fail to get the correct encoding here anyway as we won't have enough information
|
|
// - and this doesn't really account for changes in encoding
|
|
var buf bytes.Buffer
|
|
for _, f := range diff.Files {
|
|
buf.Reset()
|
|
for _, sec := range f.Sections {
|
|
for _, l := range sec.Lines {
|
|
if l.Type == DiffLineSection {
|
|
continue
|
|
}
|
|
buf.WriteString(l.Content[1:])
|
|
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 l.Type == DiffLineSection {
|
|
continue
|
|
}
|
|
if c, _, err := transform.String(d, l.Content[1:]); err == nil {
|
|
l.Content = l.Content[0:1] + c
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
diff.NumFiles = len(diff.Files)
|
|
return diff, nil
|
|
}
|
|
|
|
func parseHunks(curFile *DiffFile, maxLines, maxLineCharacters int, input *bufio.Reader) (lineBytes []byte, isFragment bool, err error) {
|
|
sb := strings.Builder{}
|
|
|
|
var (
|
|
curSection *DiffSection
|
|
curFileLinesCount int
|
|
curFileLFSPrefix bool
|
|
)
|
|
|
|
leftLine, rightLine := 1, 1
|
|
|
|
for {
|
|
sb.Reset()
|
|
lineBytes, isFragment, err = input.ReadLine()
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
return
|
|
}
|
|
err = fmt.Errorf("Unable to ReadLine: %v", err)
|
|
return
|
|
}
|
|
if lineBytes[0] == 'd' {
|
|
// End of hunks
|
|
return
|
|
}
|
|
|
|
switch lineBytes[0] {
|
|
case '@':
|
|
if curFileLinesCount >= maxLines {
|
|
curFile.IsIncomplete = true
|
|
continue
|
|
}
|
|
|
|
_, _ = sb.Write(lineBytes)
|
|
for isFragment {
|
|
// This is very odd indeed - we're in a section header and the line is too long
|
|
// This really shouldn't happen...
|
|
lineBytes, isFragment, err = input.ReadLine()
|
|
if err != nil {
|
|
// Now by the definition of ReadLine this cannot be io.EOF
|
|
err = fmt.Errorf("Unable to ReadLine: %v", err)
|
|
return
|
|
}
|
|
_, _ = sb.Write(lineBytes)
|
|
}
|
|
line := sb.String()
|
|
|
|
// Create a new section to represent this hunk
|
|
curSection = &DiffSection{}
|
|
curFile.Sections = append(curFile.Sections, curSection)
|
|
|
|
lineSectionInfo := getDiffLineSectionInfo(curFile.Name, line, leftLine-1, rightLine-1)
|
|
diffLine := &DiffLine{
|
|
Type: DiffLineSection,
|
|
Content: line,
|
|
SectionInfo: lineSectionInfo,
|
|
}
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
curSection.FileName = curFile.Name
|
|
// update line number.
|
|
leftLine = lineSectionInfo.LeftIdx
|
|
rightLine = lineSectionInfo.RightIdx
|
|
continue
|
|
case '\\':
|
|
if curFileLinesCount >= maxLines {
|
|
curFile.IsIncomplete = true
|
|
continue
|
|
}
|
|
// This is used only to indicate that the current file does not have a terminal newline
|
|
if !bytes.Equal(lineBytes, []byte("\\ No newline at end of file")) {
|
|
err = fmt.Errorf("Unexpected line in hunk: %s", string(lineBytes))
|
|
return
|
|
}
|
|
// Technically this should be the end the file!
|
|
// FIXME: we should be putting a marker at the end of the file if there is no terminal new line
|
|
continue
|
|
case '+':
|
|
curFileLinesCount++
|
|
curFile.Addition++
|
|
if curFileLinesCount >= maxLines {
|
|
curFile.IsIncomplete = true
|
|
continue
|
|
}
|
|
diffLine := &DiffLine{Type: DiffLineAdd, RightIdx: rightLine}
|
|
rightLine++
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
case '-':
|
|
curFileLinesCount++
|
|
curFile.Deletion++
|
|
if curFileLinesCount >= maxLines {
|
|
curFile.IsIncomplete = true
|
|
continue
|
|
}
|
|
diffLine := &DiffLine{Type: DiffLineDel, LeftIdx: leftLine}
|
|
if leftLine > 0 {
|
|
leftLine++
|
|
}
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
case ' ':
|
|
curFileLinesCount++
|
|
if curFileLinesCount >= maxLines {
|
|
curFile.IsIncomplete = true
|
|
continue
|
|
}
|
|
diffLine := &DiffLine{Type: DiffLinePlain, LeftIdx: leftLine, RightIdx: rightLine}
|
|
leftLine++
|
|
rightLine++
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
default:
|
|
// This is unexpected
|
|
err = fmt.Errorf("Unexpected line in hunk: %s", string(lineBytes))
|
|
return
|
|
}
|
|
|
|
line := string(lineBytes)
|
|
if isFragment {
|
|
curFile.IsIncomplete = true
|
|
for isFragment {
|
|
lineBytes, isFragment, err = input.ReadLine()
|
|
if err != nil {
|
|
// Now by the definition of ReadLine this cannot be io.EOF
|
|
err = fmt.Errorf("Unable to ReadLine: %v", err)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
curSection.Lines[len(curSection.Lines)-1].Content = line
|
|
|
|
// handle LFS
|
|
if line[1:] == models.LFSMetaFileIdentifier {
|
|
curFileLFSPrefix = true
|
|
} else if curFileLFSPrefix && strings.HasPrefix(line[1:], models.LFSMetaFileOidPrefix) {
|
|
oid := strings.TrimPrefix(line[1:], 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
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func createDiffFile(diff *Diff, line string) *DiffFile {
|
|
// The a/ and b/ filenames are the same unless rename/copy is involved.
|
|
// Especially, even for a creation or a deletion, /dev/null is not used
|
|
// in place of the a/ or b/ filenames.
|
|
//
|
|
// When rename/copy is involved, file1 and file2 show the name of the
|
|
// source file of the rename/copy and the name of the file that rename/copy
|
|
// produces, respectively.
|
|
//
|
|
// Path names are quoted if necessary.
|
|
//
|
|
// This means that you should always be able to determine the file name even when there
|
|
// there is potential ambiguity...
|
|
//
|
|
// but we can be simpler with our heuristics by just forcing git to prefix things nicely
|
|
curFile := &DiffFile{
|
|
Index: len(diff.Files) + 1,
|
|
Type: DiffFileChange,
|
|
Sections: make([]*DiffSection, 0, 10),
|
|
}
|
|
|
|
rd := strings.NewReader(line[len(cmdDiffHead):] + " ")
|
|
curFile.Type = DiffFileChange
|
|
curFile.OldName = readFileName(rd)
|
|
curFile.Name = readFileName(rd)
|
|
curFile.IsRenamed = curFile.Name != curFile.OldName
|
|
return curFile
|
|
}
|
|
|
|
func readFileName(rd *strings.Reader) string {
|
|
var name string
|
|
char, _ := rd.ReadByte()
|
|
_ = rd.UnreadByte()
|
|
if char == '"' {
|
|
fmt.Fscanf(rd, "%q ", &name)
|
|
if name[0] == '\\' {
|
|
name = name[1:]
|
|
}
|
|
} else {
|
|
fmt.Fscanf(rd, "%s ", &name)
|
|
}
|
|
return name[2:]
|
|
}
|
|
|
|
// 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 || beforeCommitID == git.EmptySHA) && commit.ParentCount() == 0 {
|
|
diffArgs := []string{"diff", "--src-prefix=\\a/", "--dst-prefix=\\b/", "-M"}
|
|
if len(whitespaceBehavior) != 0 {
|
|
diffArgs = append(diffArgs, whitespaceBehavior)
|
|
}
|
|
// append empty tree ref
|
|
diffArgs = append(diffArgs, "4b825dc642cb6eb9a060e54bf8d69288fbee4904")
|
|
diffArgs = append(diffArgs, afterCommitID)
|
|
cmd = exec.CommandContext(ctx, git.GitExecutable, diffArgs...)
|
|
} else {
|
|
actualBeforeCommitID := beforeCommitID
|
|
if len(actualBeforeCommitID) == 0 {
|
|
parentCommit, _ := commit.Parent(0)
|
|
actualBeforeCommitID = parentCommit.ID.String()
|
|
}
|
|
diffArgs := []string{"diff", "--src-prefix=\\a/", "--dst-prefix=\\b/", "-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)
|
|
}
|
|
|
|
shortstatArgs := []string{beforeCommitID + "..." + afterCommitID}
|
|
if len(beforeCommitID) == 0 || beforeCommitID == git.EmptySHA {
|
|
shortstatArgs = []string{git.EmptyTreeSHA, afterCommitID}
|
|
}
|
|
diff.NumFiles, diff.TotalAddition, diff.TotalDeletion, err = git.GetDiffShortStat(repoPath, shortstatArgs...)
|
|
if err != nil && strings.Contains(err.Error(), "no merge base") {
|
|
// git >= 2.28 now returns an error if base and head have become unrelated.
|
|
// previously it would return the results of git diff --shortstat base head so let's try that...
|
|
shortstatArgs = []string{beforeCommitID, afterCommitID}
|
|
diff.NumFiles, diff.TotalAddition, diff.TotalDeletion, err = git.GetDiffShortStat(repoPath, shortstatArgs...)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return diff, 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
|
|
}
|