diff options
Diffstat (limited to 'vendor/github.com/gogs/git-module/repo_diff.go')
-rw-r--r-- | vendor/github.com/gogs/git-module/repo_diff.go | 400 |
1 files changed, 0 insertions, 400 deletions
diff --git a/vendor/github.com/gogs/git-module/repo_diff.go b/vendor/github.com/gogs/git-module/repo_diff.go deleted file mode 100644 index 258a166f..00000000 --- a/vendor/github.com/gogs/git-module/repo_diff.go +++ /dev/null @@ -1,400 +0,0 @@ -// Copyright 2017 The Gogs 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 git - -import ( - "bufio" - "bytes" - "fmt" - "io" - "io/ioutil" - "strconv" - "strings" - "time" -) - -// DiffLineType represents the type of a line in diff. -type DiffLineType uint8 - -const ( - DIFF_LINE_PLAIN DiffLineType = iota + 1 - DIFF_LINE_ADD - DIFF_LINE_DEL - DIFF_LINE_SECTION -) - -// DiffFileType represents the file status in diff. -type DiffFileType uint8 - -const ( - DIFF_FILE_ADD DiffFileType = iota + 1 - DIFF_FILE_CHANGE - DIFF_FILE_DEL - DIFF_FILE_RENAME -) - -// DiffLine represents a line in diff. -type DiffLine struct { - LeftIdx int - RightIdx int - Type DiffLineType - Content string -} - -func (d *DiffLine) GetType() int { - return int(d.Type) -} - -// DiffSection represents a section in diff. -type DiffSection struct { - Name string - Lines []*DiffLine -} - -// Line returns a specific line by type (add or del) and file line number from a section. -func (diffSection *DiffSection) Line(lineType DiffLineType, idx int) *DiffLine { - var ( - difference = 0 - addCount = 0 - delCount = 0 - matchDiffLine *DiffLine - ) - -LOOP: - for _, diffLine := range diffSection.Lines { - switch diffLine.Type { - case DIFF_LINE_ADD: - addCount++ - case DIFF_LINE_DEL: - delCount++ - default: - if matchDiffLine != nil { - break LOOP - } - difference = diffLine.RightIdx - diffLine.LeftIdx - addCount = 0 - delCount = 0 - } - - switch lineType { - case DIFF_LINE_DEL: - if diffLine.RightIdx == 0 && diffLine.LeftIdx == idx-difference { - matchDiffLine = diffLine - } - case DIFF_LINE_ADD: - if diffLine.LeftIdx == 0 && diffLine.RightIdx == idx+difference { - matchDiffLine = diffLine - } - } - } - - if addCount == delCount { - return matchDiffLine - } - return nil -} - -// DiffFile represents a file in diff. -type DiffFile struct { - Name string - OldName string - Index string // 40-byte SHA, Changed/New: new SHA; Deleted: old SHA - Addition, Deletion int - Type DiffFileType - IsCreated bool - IsDeleted bool - IsBin bool - IsRenamed bool - IsSubmodule bool - Sections []*DiffSection - IsIncomplete bool -} - -func (diffFile *DiffFile) GetType() int { - return int(diffFile.Type) -} - -func (diffFile *DiffFile) NumSections() int { - return len(diffFile.Sections) -} - -// Diff contains all information of a specific diff output. -type Diff struct { - TotalAddition, TotalDeletion int - Files []*DiffFile - IsIncomplete bool -} - -func (diff *Diff) NumFiles() int { - return len(diff.Files) -} - -const _DIFF_HEAD = "diff --git " - -// ParsePatch takes a reader and parses everything it receives in diff format. -func ParsePatch(done chan<- error, maxLines, maxLineCharacteres, maxFiles int, reader io.Reader) *Diff { - var ( - diff = &Diff{Files: make([]*DiffFile, 0)} - - curFile *DiffFile - curSection = &DiffSection{ - Lines: make([]*DiffLine, 0, 10), - } - - leftLine, rightLine int - lineCount int - curFileLinesCount int - ) - input := bufio.NewReader(reader) - isEOF := false - for !isEOF { - // TODO: would input.ReadBytes be more memory-efficient? - line, err := input.ReadString('\n') - if err != nil { - if err == io.EOF { - isEOF = true - } else { - done <- fmt.Errorf("ReadString: %v", err) - return nil - } - } - - if len(line) > 0 && line[len(line)-1] == '\n' { - // Remove line break. - line = line[:len(line)-1] - } - - if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") || len(line) == 0 { - continue - } - - curFileLinesCount++ - lineCount++ - - // Diff data too large, we only show the first about maxlines lines - if curFileLinesCount >= maxLines || len(line) >= maxLineCharacteres { - curFile.IsIncomplete = true - } - - switch { - case line[0] == ' ': - diffLine := &DiffLine{Type: DIFF_LINE_PLAIN, 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) - ss := strings.Split(line, "@@") - diffLine := &DiffLine{Type: DIFF_LINE_SECTION, Content: line} - curSection.Lines = append(curSection.Lines, diffLine) - - // Parse line number. - ranges := strings.Split(ss[1][1:], " ") - leftLine, _ = strconv.Atoi(strings.Split(ranges[0], ",")[0][1:]) - if len(ranges) > 1 { - rightLine, _ = strconv.Atoi(strings.Split(ranges[1], ",")[0]) - } else { - rightLine = leftLine - } - continue - case line[0] == '+': - curFile.Addition++ - diff.TotalAddition++ - diffLine := &DiffLine{Type: DIFF_LINE_ADD, Content: line, RightIdx: rightLine} - rightLine++ - curSection.Lines = append(curSection.Lines, diffLine) - continue - case line[0] == '-': - curFile.Deletion++ - diff.TotalDeletion++ - diffLine := &DiffLine{Type: DIFF_LINE_DEL, 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, _DIFF_HEAD) { - middle := -1 - - // 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(_DIFF_HEAD)] == '"' - if hasQuote { - middle = strings.Index(line, ` "b/`) - } else { - middle = strings.Index(line, " b/") - } - - beg := len(_DIFF_HEAD) - a := line[beg+2 : middle] - b := line[middle+3:] - if hasQuote { - a = string(UnescapeChars([]byte(a[1 : len(a)-1]))) - b = string(UnescapeChars([]byte(b[1 : len(b)-1]))) - } - - curFile = &DiffFile{ - Name: a, - Type: DIFF_FILE_CHANGE, - Sections: make([]*DiffSection, 0, 10), - } - diff.Files = append(diff.Files, curFile) - if len(diff.Files) >= maxFiles { - diff.IsIncomplete = true - io.Copy(ioutil.Discard, reader) - break - } - curFileLinesCount = 0 - - // Check file diff type and submodule. - CHECK_TYPE: - for { - line, err := input.ReadString('\n') - if err != nil { - if err == io.EOF { - isEOF = true - } else { - done <- fmt.Errorf("ReadString: %v", err) - return nil - } - } - - switch { - case strings.HasPrefix(line, "new file"): - curFile.Type = DIFF_FILE_ADD - curFile.IsCreated = true - curFile.IsSubmodule = strings.HasSuffix(line, " 160000\n") - case strings.HasPrefix(line, "deleted"): - curFile.Type = DIFF_FILE_DEL - curFile.IsDeleted = true - curFile.IsSubmodule = strings.HasSuffix(line, " 160000\n") - case strings.HasPrefix(line, "index"): - if curFile.IsDeleted { - curFile.Index = line[6:46] - } else if len(line) >= 88 { - curFile.Index = line[49:88] - } else { - curFile.Index = curFile.Name - } - break CHECK_TYPE - case strings.HasPrefix(line, "similarity index 100%"): - curFile.Type = DIFF_FILE_RENAME - curFile.IsRenamed = true - curFile.OldName = curFile.Name - curFile.Name = b - curFile.Index = b - break CHECK_TYPE - case strings.HasPrefix(line, "old mode"): - break CHECK_TYPE - } - } - } - } - - done <- nil - return diff -} - -// GetDiffRange returns a parsed diff object between given commits. -func GetDiffRange(repoPath, beforeCommitID, afterCommitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) { - repo, err := OpenRepository(repoPath) - if err != nil { - return nil, err - } - - commit, err := repo.GetCommit(afterCommitID) - if err != nil { - return nil, err - } - - cmd := NewCommand() - if len(beforeCommitID) == 0 { - // First commit of repository - if commit.ParentCount() == 0 { - cmd.AddArguments("show", "--full-index", afterCommitID) - } else { - c, _ := commit.Parent(0) - cmd.AddArguments("diff", "--full-index", "-M", c.ID.String(), afterCommitID) - } - } else { - cmd.AddArguments("diff", "--full-index", "-M", beforeCommitID, afterCommitID) - } - - stdout, w := io.Pipe() - done := make(chan error) - var diff *Diff - go func() { - diff = ParsePatch(done, maxLines, maxLineCharacteres, maxFiles, stdout) - }() - - stderr := new(bytes.Buffer) - err = cmd.RunInDirTimeoutPipeline(2*time.Minute, repoPath, w, stderr) - w.Close() // Close writer to exit parsing goroutine - if err != nil { - return nil, concatenateError(err, stderr.String()) - } - - return diff, <-done -} - -// RawDiffType represents the type of raw diff format. -type RawDiffType string - -const ( - RAW_DIFF_NORMAL RawDiffType = "diff" - RAW_DIFF_PATCH RawDiffType = "patch" -) - -// GetRawDiff dumps diff results of repository in given commit ID to io.Writer. -func GetRawDiff(repoPath, commitID string, diffType RawDiffType, writer io.Writer) error { - repo, err := OpenRepository(repoPath) - if err != nil { - return fmt.Errorf("OpenRepository: %v", err) - } - - commit, err := repo.GetCommit(commitID) - if err != nil { - return err - } - - cmd := NewCommand() - switch diffType { - case RAW_DIFF_NORMAL: - if commit.ParentCount() == 0 { - cmd.AddArguments("show", commitID) - } else { - c, _ := commit.Parent(0) - cmd.AddArguments("diff", "-M", c.ID.String(), commitID) - } - case RAW_DIFF_PATCH: - if commit.ParentCount() == 0 { - cmd.AddArguments("format-patch", "--no-signature", "--stdout", "--root", commitID) - } else { - c, _ := commit.Parent(0) - query := fmt.Sprintf("%s...%s", commitID, c.ID.String()) - cmd.AddArguments("format-patch", "--no-signature", "--stdout", query) - } - default: - return fmt.Errorf("invalid diffType: %s", diffType) - } - - stderr := new(bytes.Buffer) - if err = cmd.RunInDirPipeline(repoPath, writer, stderr); err != nil { - return concatenateError(err, stderr.String()) - } - return nil -} - -// GetDiffCommit returns a parsed diff object of given commit. -func GetDiffCommit(repoPath, commitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) { - return GetDiffRange(repoPath, "", commitID, maxLines, maxLineCharacteres, maxFiles) -} |