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-rw-r--r--diff.go305
1 files changed, 305 insertions, 0 deletions
diff --git a/diff.go b/diff.go
new file mode 100644
index 0000000..31000bc
--- /dev/null
+++ b/diff.go
@@ -0,0 +1,305 @@
+package git
+
+/*
+#include <git2.h>
+
+extern int _go_git_diff_foreach(git_diff *diff, int eachFile, int eachHunk, int eachLine, void *payload);
+*/
+import "C"
+import (
+ "runtime"
+ "unsafe"
+)
+
+type DiffFlag int
+
+const (
+ DiffFlagBinary DiffFlag = C.GIT_DIFF_FLAG_BINARY
+ DiffFlagNotBinary = C.GIT_DIFF_FLAG_NOT_BINARY
+ DiffFlagValidOid = C.GIT_DIFF_FLAG_VALID_OID
+)
+
+type Delta int
+
+const (
+ DeltaUnmodified Delta = C.GIT_DELTA_UNMODIFIED
+ DeltaAdded = C.GIT_DELTA_ADDED
+ DeltaDeleted = C.GIT_DELTA_DELETED
+ DeltaModified = C.GIT_DELTA_MODIFIED
+ DeltaRenamed = C.GIT_DELTA_RENAMED
+ DeltaCopied = C.GIT_DELTA_COPIED
+ DeltaIgnored = C.GIT_DELTA_IGNORED
+ DeltaUntracked = C.GIT_DELTA_UNTRACKED
+ DeltaTypeChange = C.GIT_DELTA_TYPECHANGE
+)
+
+type DiffLineType int
+
+const (
+ DiffLineContext DiffLineType = C.GIT_DIFF_LINE_CONTEXT
+ DiffLineAddition = C.GIT_DIFF_LINE_ADDITION
+ DiffLineDeletion = C.GIT_DIFF_LINE_DELETION
+ DiffLineContextEOFNL = C.GIT_DIFF_LINE_CONTEXT_EOFNL
+ DiffLineAddEOFNL = C.GIT_DIFF_LINE_ADD_EOFNL
+ DiffLineDelEOFNL = C.GIT_DIFF_LINE_DEL_EOFNL
+
+ DiffLineFileHdr = C.GIT_DIFF_LINE_FILE_HDR
+ DiffLineHunkHdr = C.GIT_DIFF_LINE_HUNK_HDR
+ DiffLineBinary = C.GIT_DIFF_LINE_BINARY
+)
+
+type DiffFile struct {
+ Path string
+ Oid *Oid
+ Size int
+ Flags DiffFlag
+ Mode uint16
+}
+
+func newDiffFileFromC(file *C.git_diff_file) *DiffFile {
+ return &DiffFile{
+ Path: C.GoString(file.path),
+ Oid: newOidFromC(&file.oid),
+ Size: int(file.size),
+ Flags: DiffFlag(file.flags),
+ Mode: uint16(file.mode),
+ }
+}
+
+type DiffDelta struct {
+ Status Delta
+ Flags DiffFlag
+ Similarity uint16
+ OldFile *DiffFile
+ NewFile *DiffFile
+}
+
+func newDiffDeltaFromC(delta *C.git_diff_delta) *DiffDelta {
+ return &DiffDelta{
+ Status: Delta(delta.status),
+ Flags: DiffFlag(delta.flags),
+ Similarity: uint16(delta.similarity),
+ OldFile: newDiffFileFromC(&delta.old_file),
+ NewFile: newDiffFileFromC(&delta.new_file),
+ }
+}
+
+type DiffHunk struct {
+ OldStart int
+ OldLines int
+ NewStart int
+ NewLines int
+ Header string
+ DiffDelta
+}
+
+func newDiffHunkFromC(delta *C.git_diff_delta, hunk *C.git_diff_hunk) *DiffHunk {
+ return &DiffHunk{
+ OldStart: int(hunk.old_start),
+ OldLines: int(hunk.old_lines),
+ NewStart: int(hunk.new_start),
+ NewLines: int(hunk.new_lines),
+ Header: C.GoStringN(&hunk.header[0], C.int(hunk.header_len)),
+ DiffDelta: *newDiffDeltaFromC(delta),
+ }
+}
+
+type DiffLine struct {
+ Origin DiffLineType
+ OldLineno int
+ NewLineno int
+ NumLines int
+ Content string
+ DiffHunk
+}
+
+func newDiffLineFromC(delta *C.git_diff_delta, hunk *C.git_diff_hunk, line *C.git_diff_line) *DiffLine {
+ return &DiffLine{
+ Origin: DiffLineType(line.origin),
+ OldLineno: int(line.old_lineno),
+ NewLineno: int(line.new_lineno),
+ NumLines: int(line.num_lines),
+ Content: C.GoStringN(line.content, C.int(line.content_len)),
+ DiffHunk: *newDiffHunkFromC(delta, hunk),
+ }
+}
+
+type Diff struct {
+ ptr *C.git_diff
+}
+
+func newDiffFromC(ptr *C.git_diff) *Diff {
+ if ptr == nil {
+ return nil
+ }
+
+ diff := &Diff{
+ ptr: ptr,
+ }
+
+ runtime.SetFinalizer(diff, (*Diff).Free)
+ return diff
+}
+
+func (diff *Diff) Free() error {
+ if diff.ptr != nil {
+ return ErrInvalid
+ }
+ runtime.SetFinalizer(diff, nil)
+ C.git_diff_free(diff.ptr)
+ return nil
+}
+
+type diffForEachFileData struct {
+ Callback DiffForEachFileCallback
+ Error error
+}
+
+func (diff *Diff) ForEachFile(cb DiffForEachFileCallback) error {
+ if diff.ptr != nil {
+ return ErrInvalid
+ }
+
+ data := &diffForEachFileData{
+ Callback: cb,
+ }
+ ecode := C._go_git_diff_foreach(diff.ptr, 1, 0, 0, unsafe.Pointer(&data))
+ if ecode < 0 {
+ return data.Error
+ }
+ return nil
+}
+
+//export diffForEachFileCb
+func diffForEachFileCb(delta *C.git_diff_delta, progress C.float, payload unsafe.Pointer) int {
+ data := *diffForEachFileData(payload)
+
+ err := data.Callback(newDiffDeltaFromC(delta))
+ if err != nil {
+ data.Error = err
+ return -1
+ }
+
+ return 0
+}
+
+type diffForEachHunkData struct {
+ Callback DiffForEachHunkCallback
+ Error error
+}
+
+type DiffForEachHunkCallback func(*DiffHunk) error
+
+func (diff *Diff) ForEachHunk(cb DiffForEachHunkCallback) error {
+ if diff.ptr != nil {
+ return ErrInvalid
+ }
+ data := &diffForEachHunkData{
+ Callback: cb,
+ }
+ ecode := C._go_git_diff_foreach(diff.ptr, 0, 1, 0, unsafe.Pointer(data))
+ if ecode < 0 {
+ return data.Error
+ }
+ return nil
+}
+
+//export diffForEachHunkCb
+func diffForEachHunkCb(delta *C.git_diff_delta, hunk *C.git_diff_hunk, payload unsafe.Pointer) int {
+ data := *diffForEachHunkData(payload)
+
+ err := data.Callback(newDiffHunkFromC(delta, hunk))
+ if err < 0 {
+ data.Error = err
+ return -1
+ }
+
+ return 0
+}
+
+type diffForEachLineData struct {
+ Callback DiffForEachLineCallback
+ Error error
+}
+
+type DiffForEachLineCallback func(*DiffLine) error
+
+func (diff *Diff) ForEachLine(cb DiffForEachLineCallback) error {
+ if diff.ptr != nil {
+ return ErrInvalid
+ }
+
+ data := &diffForEachLineData{
+ Callback: cb,
+ }
+
+ ecode := C._go_git_diff_foreach(diff.ptr, 0, 0, 1, unsafe.Pointer(data))
+ if ecode < 0 {
+ return data.Error
+ }
+ return nil
+}
+
+//export diffForEachLineCb
+func diffForEachLineCb(delta *C.git_diff_delta, hunk *C.git_diff_hunk, line *C.git_diff_line, payload unsafe.Pointer) int {
+
+ data := *diffForEachLineData(payload)
+
+ err := data.Callback(newDiffLineFromC(delta, hunk, line))
+ if err != nil {
+ data.Error = err
+ return -1
+ }
+
+ return 0
+}
+
+func (diff *Diff) NumDeltas() (int, error) {
+ if diff.ptr != nil {
+ return -1, ErrInvalid
+ }
+ return int(C.git_diff_num_deltas(diff.ptr)), nil
+}
+
+func (diff *Diff) GetDelta(index int) (*DiffDelta, error) {
+ if diff.ptr != nil {
+ return nil, ErrInvalid
+ }
+ ptr := C.git_diff_get_delta(diff.ptr, C.size_t(index))
+ if ptr == nil {
+ return nil
+ }
+
+ return newDiffDeltaFromC(ptr), nil
+}
+
+func (diff *Diff) Patch(deltaIndex int) (*Patch, error) {
+ if diff.ptr != nil {
+ return nil, ErrInvalid
+ }
+ var patchPtr *C.git_patch
+
+ ecode := C.git_patch_from_diff(&patchPtr, diff.ptr, C.size_t(deltaIndex))
+ if ecode < 0 {
+ return nil, MakeGitError(ecode)
+ }
+
+ return newPatchFromC(patchPtr), nil
+}
+
+func (v *Repository) DiffTreeToTree(oldTree, newTree *Tree) *Diff {
+ var diffPtr *C.git_diff
+ var oldPtr, newPtr *C.git_tree
+
+ if oldTree != nil {
+ oldPtr = oldTree.gitObject.ptr
+ }
+
+ if newTree != nil {
+ newPtr = newTree.gitObject.ptr
+ }
+
+ C.git_diff_tree_to_tree(&diffPtr, v.ptr, oldPtr, newPtr, nil)
+
+ return newDiff(diffPtr)
+}
generated by cgit v1.2.3 (git 2.51.0) at 2025-11-06 18:04:49 +0000