113 lines
2 KiB
Go
113 lines
2 KiB
Go
package git
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import (
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"fmt"
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"log"
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"strings"
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"github.com/bluekeyes/go-gitdiff/gitdiff"
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"github.com/go-git/go-git/v5/plumbing/object"
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)
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type TextFragment struct {
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Header string
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Lines []gitdiff.Line
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}
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type Diff struct {
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Name struct {
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Old string
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New string
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}
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TextFragments []TextFragment
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}
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// A nicer git diff representation.
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type NiceDiff struct {
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Commit struct {
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Message string
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Author object.Signature
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This string
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Parent string
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}
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Stat struct {
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FilesChanged int
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Insertions int
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Deletions int
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}
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Diff []Diff
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}
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func (g *GitRepo) Diff() (*NiceDiff, error) {
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c, err := g.r.CommitObject(g.h)
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if err != nil {
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return nil, fmt.Errorf("commit object: %w", err)
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}
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patch := &object.Patch{}
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commitTree, err := c.Tree()
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parent := &object.Commit{}
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if err == nil {
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parentTree := &object.Tree{}
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if c.NumParents() != 0 {
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parent, err = c.Parents().Next()
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if err == nil {
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parentTree, err = parent.Tree()
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if err == nil {
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patch, err = parentTree.Patch(commitTree)
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if err != nil {
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return nil, fmt.Errorf("patch: %w", err)
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}
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}
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}
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} else {
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patch, err = parentTree.Patch(commitTree)
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if err != nil {
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return nil, fmt.Errorf("patch: %w", err)
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}
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}
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}
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diffs, _, err := gitdiff.Parse(strings.NewReader(patch.String()))
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if err != nil {
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log.Println(err)
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}
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nd := NiceDiff{}
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nd.Commit.This = c.Hash.String()
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if parent.Hash.IsZero() {
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nd.Commit.Parent = ""
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} else {
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nd.Commit.Parent = parent.Hash.String()
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}
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nd.Commit.Author = c.Author
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nd.Commit.Message = c.Message
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for _, d := range diffs {
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ndiff := Diff{}
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ndiff.Name.New = d.NewName
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ndiff.Name.Old = d.OldName
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for _, tf := range d.TextFragments {
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ndiff.TextFragments = append(ndiff.TextFragments, TextFragment{
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Header: tf.Header(),
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Lines: tf.Lines,
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})
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for _, l := range tf.Lines {
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switch l.Op {
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case gitdiff.OpAdd:
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nd.Stat.Insertions += 1
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case gitdiff.OpDelete:
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nd.Stat.Deletions += 1
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}
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}
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}
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nd.Diff = append(nd.Diff, ndiff)
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}
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nd.Stat.FilesChanged = len(diffs)
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return &nd, nil
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}
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