WIP: submodule conflict resolution

common/git_parser.go

@@ -0,0 +1,296 @@
+package common
+
+import (
+	"errors"
+	"fmt"
+	"io"
+)
+
+const (
+	GitStatus_Untracked = 0
+	GitStatus_Modified  = 1
+	GitStatus_Ignored   = 2
+	GitStatus_Unmerged  = 3 // States[0..3] -- Stage1, Stage2, Stage3 of merge objects
+	GitStatus_Renamed   = 4 // orig name in States[0]
+)
+
+type GitStatusData struct {
+	Path   string
+	Status int
+	States [3]string
+
+	/*
+	 <sub> A 4 character field describing the submodule state.
+	            "N..." when the entry is not a submodule.
+	            "S<c><m><u>" when the entry is a submodule.
+	            <c> is "C" if the commit changed; otherwise ".".
+	            <m> is "M" if it has tracked changes; otherwise ".".
+	            <u> is "U" if there are untracked changes; otherwise ".".
+	*/
+	SubmoduleChanges string
+}
+
+func parseGit_HexString(data io.ByteReader) (string, error) {
+	str := make([]byte, 0, 32)
+	for {
+		c, err := data.ReadByte()
+		if err != nil {
+			return "", err
+		}
+		switch {
+		case c == 0 || c == ' ':
+			return string(str), nil
+		case c >= 'a' && c <= 'f':
+		case c >= 'A' && c <= 'F':
+		case c >= '0' && c <= '9':
+		default:
+			return "", errors.New("Invalid character in hex string:" + string(c))
+		}
+		str = append(str, c)
+	}
+}
+func parseGit_String(data io.ByteReader) (string, error) {
+	str := make([]byte, 0, 100)
+	for {
+		c, err := data.ReadByte()
+		if err != nil {
+			return "", errors.New("Unexpected EOF. Expected NUL string term")
+		}
+		if c == 0 || c == ' ' {
+			return string(str), nil
+		}
+		str = append(str, c)
+	}
+}
+
+func parseGit_StringWithSpace(data io.ByteReader) (string, error) {
+	str := make([]byte, 0, 100)
+	for {
+		c, err := data.ReadByte()
+		if err != nil {
+			return "", errors.New("Unexpected EOF. Expected NUL string term")
+		}
+		if c == 0 {
+			return string(str), nil
+		}
+		str = append(str, c)
+	}
+}
+
+func skipGitStatusEntry(data io.ByteReader, skipSpaceLen int) error {
+	for skipSpaceLen > 0 {
+		c, err := data.ReadByte()
+		if err != nil {
+			return err
+		}
+		if c == ' ' {
+			skipSpaceLen--
+		}
+	}
+
+	return nil
+}
+
+func parseSingleStatusEntry(data io.ByteReader) (*GitStatusData, error) {
+	ret := GitStatusData{}
+	statusType, err := data.ReadByte()
+	if err != nil {
+		return nil, nil
+	}
+	switch statusType {
+	case '1':
+		var err error
+		if err = skipGitStatusEntry(data, 8); err != nil {
+			return nil, err
+		}
+		ret.Status = GitStatus_Modified
+		ret.Path, err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+	case '2':
+		var err error
+		if err = skipGitStatusEntry(data, 9); err != nil {
+			return nil, err
+		}
+		ret.Status = GitStatus_Renamed
+		ret.Path, err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+		ret.States[0], err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+	case '?':
+		var err error
+		if err = skipGitStatusEntry(data, 1); err != nil {
+			return nil, err
+		}
+		ret.Status = GitStatus_Untracked
+		ret.Path, err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+	case '!':
+		var err error
+		if err = skipGitStatusEntry(data, 1); err != nil {
+			return nil, err
+		}
+		ret.Status = GitStatus_Ignored
+		ret.Path, err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+	case 'u':
+		var err error
+		if err = skipGitStatusEntry(data, 2); err != nil {
+			return nil, err
+		}
+		if ret.SubmoduleChanges, err = parseGit_String(data); err != nil {
+			return nil, err
+		}
+		if err = skipGitStatusEntry(data, 4); err != nil {
+			return nil, err
+		}
+
+		if ret.States[0], err = parseGit_HexString(data); err != nil {
+			return nil, err
+		}
+		if ret.States[1], err = parseGit_HexString(data); err != nil {
+			return nil, err
+		}
+		if ret.States[2], err = parseGit_HexString(data); err != nil {
+			return nil, err
+		}
+		ret.Status = GitStatus_Unmerged
+		ret.Path, err = parseGit_StringWithSpace(data)
+		if err != nil {
+			return nil, err
+		}
+	default:
+		return nil, errors.New("Invalid status type" + string(statusType))
+	}
+	return &ret, nil
+}
+
+func parseGitStatusData(data io.ByteReader) (Data, error) {
+	ret := make([]GitStatusData, 0, 10)
+	for {
+		data, err := parseSingleStatusEntry(data)
+		if err != nil {
+			return nil, err
+		} else if data == nil {
+			break
+		}
+
+		ret = append(ret, *data)
+	}
+	return ret, nil
+}
+
+type Data interface{}
+
+type CommitStatus int
+
+const (
+	Add CommitStatus = iota
+	Rm
+	Copy
+	Modify
+	Rename
+	TypeChange
+	Unmerged
+	Unknown
+)
+
+type GitDiffRawData struct {
+	SrcMode, DstMode     string
+	SrcCommit, DstCommit string
+	Status               CommitStatus
+	Src, Dst             string
+}
+
+func parseGit_DiffIndexStatus(data io.ByteReader, d *GitDiffRawData) error {
+	b, err := data.ReadByte()
+	if err != nil {
+		return err
+	}
+
+	switch b {
+	case 'A':
+		d.Status = Add
+	case 'C':
+		d.Status = Copy
+	case 'D':
+		d.Status = Rm
+	case 'M':
+		d.Status = Modify
+	case 'R':
+		d.Status = Rename
+	case 'T':
+		d.Status = TypeChange
+	case 'U':
+		d.Status = Unmerged
+	case 'X':
+		return fmt.Errorf("Unexpected unknown change type. This is a git bug")
+	}
+	_, err = parseGit_StringWithSpace(data)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func parseSingleGitDiffIndexRawData(data io.ByteReader) (*GitDiffRawData, error) {
+	var ret GitDiffRawData
+
+	b, err := data.ReadByte()
+	if err != nil {
+		return nil, err
+	}
+	if b != ':' {
+		return nil, fmt.Errorf("Expected ':' but got '%s'", string(b))
+	}
+
+	if ret.SrcMode, err = parseGit_String(data); err != nil {
+		return nil, err
+	}
+	if ret.DstMode, err = parseGit_String(data); err != nil {
+		return nil, err
+	}
+	if ret.Src, err = parseGit_String(data); err != nil {
+		return nil, err
+	}
+	if ret.Dst, err = parseGit_String(data); err != nil {
+		return nil, err
+	}
+	if err = parseGit_DiffIndexStatus(data, &ret); err != nil {
+		return nil, err
+	}
+	ret.Dst = ret.Src
+	switch ret.Status {
+	case Copy, Rename:
+		if ret.Src, err = parseGit_StringWithSpace(data); err != nil {
+			return nil, err
+		}
+	}
+
+	return &ret, nil
+}
+
+func parseGitDiffIndexRawData(data io.ByteReader) (Data, error) {
+	ret := make([]GitDiffRawData, 0, 10)
+	for {
+		data, err := parseSingleGitDiffIndexRawData(data)
+		if err != nil {
+			return nil, err
+		} else if data == nil {
+			break
+		}
+
+		ret = append(ret, *data)
+	}
+	return ret, nil
+}

common/git_utils.go

@@ -19,9 +19,7 @@ package common
  */
 
 import (
-	"bufio"
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -40,6 +38,10 @@ type GitSubmoduleLister interface {
 	GitSubmoduleCommitId(cwd, packageName, commitId string) (subCommitId string, valid bool)
 }
 
+type GitSubmoduleFileConflictResolver interface {
+	GitResolveSubmoduleFileConflict(cwd string) error
+}
+
 type GitStatusLister interface {
 	GitStatus(cwd string) ([]GitStatusData, error)
 }
@@ -70,6 +72,7 @@ type Git interface {
 	GitExecQuietOrPanic(cwd string, params ...string)
 
 	GitDiffLister
+	GitSubmoduleFileConflictResolver
 }
 
 type GitHandlerImpl struct {
@@ -923,193 +926,10 @@ func (e *GitHandlerImpl) GitSubmoduleCommitId(cwd, packageName, commitId string)
 	return subCommitId, len(subCommitId) > 0
 }
 
-const (
-	GitStatus_Untracked = 0
-	GitStatus_Modified  = 1
-	GitStatus_Ignored   = 2
-	GitStatus_Unmerged  = 3 // States[0..3] -- Stage1, Stage2, Stage3 of merge objects
-	GitStatus_Renamed   = 4 // orig name in States[0]
-)
-
-type GitStatusData struct {
-	Path   string
-	Status int
-	States [3]string
-
-	/*
-	 <sub> A 4 character field describing the submodule state.
-	            "N..." when the entry is not a submodule.
-	            "S<c><m><u>" when the entry is a submodule.
-	            <c> is "C" if the commit changed; otherwise ".".
-	            <m> is "M" if it has tracked changes; otherwise ".".
-	            <u> is "U" if there are untracked changes; otherwise ".".
-	*/
-	SubmoduleChanges string
-}
-
-func parseGitStatusHexString(data io.ByteReader) (string, error) {
-	str := make([]byte, 0, 32)
-	for {
-		c, err := data.ReadByte()
-		if err != nil {
-			return "", err
-		}
-		switch {
-		case c == 0 || c == ' ':
-			return string(str), nil
-		case c >= 'a' && c <= 'f':
-		case c >= 'A' && c <= 'F':
-		case c >= '0' && c <= '9':
-		default:
-			return "", errors.New("Invalid character in hex string:" + string(c))
-		}
-		str = append(str, c)
-	}
-}
-func parseGitStatusString(data io.ByteReader) (string, error) {
-	str := make([]byte, 0, 100)
-	for {
-		c, err := data.ReadByte()
-		if err != nil {
-			return "", errors.New("Unexpected EOF. Expected NUL string term")
-		}
-		if c == 0 || c == ' ' {
-			return string(str), nil
-		}
-		str = append(str, c)
-	}
-}
-
-func parseGitStatusStringWithSpace(data io.ByteReader) (string, error) {
-	str := make([]byte, 0, 100)
-	for {
-		c, err := data.ReadByte()
-		if err != nil {
-			return "", errors.New("Unexpected EOF. Expected NUL string term")
-		}
-		if c == 0 {
-			return string(str), nil
-		}
-		str = append(str, c)
-	}
-}
-
-func skipGitStatusEntry(data io.ByteReader, skipSpaceLen int) error {
-	for skipSpaceLen > 0 {
-		c, err := data.ReadByte()
-		if err != nil {
-			return err
-		}
-		if c == ' ' {
-			skipSpaceLen--
-		}
-	}
-
-	return nil
-}
-
-func parseSingleStatusEntry(data io.ByteReader) (*GitStatusData, error) {
-	ret := GitStatusData{}
-	statusType, err := data.ReadByte()
-	if err != nil {
-		return nil, nil
-	}
-	switch statusType {
-	case '1':
-		var err error
-		if err = skipGitStatusEntry(data, 8); err != nil {
-			return nil, err
-		}
-		ret.Status = GitStatus_Modified
-		ret.Path, err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-	case '2':
-		var err error
-		if err = skipGitStatusEntry(data, 9); err != nil {
-			return nil, err
-		}
-		ret.Status = GitStatus_Renamed
-		ret.Path, err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-		ret.States[0], err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-	case '?':
-		var err error
-		if err = skipGitStatusEntry(data, 1); err != nil {
-			return nil, err
-		}
-		ret.Status = GitStatus_Untracked
-		ret.Path, err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-	case '!':
-		var err error
-		if err = skipGitStatusEntry(data, 1); err != nil {
-			return nil, err
-		}
-		ret.Status = GitStatus_Ignored
-		ret.Path, err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-	case 'u':
-		var err error
-		if err = skipGitStatusEntry(data, 2); err != nil {
-			return nil, err
-		}
-		if ret.SubmoduleChanges, err = parseGitStatusString(data); err != nil {
-			return nil, err
-		}
-		if err = skipGitStatusEntry(data, 4); err != nil {
-			return nil, err
-		}
-
-		if ret.States[0], err = parseGitStatusHexString(data); err != nil {
-			return nil, err
-		}
-		if ret.States[1], err = parseGitStatusHexString(data); err != nil {
-			return nil, err
-		}
-		if ret.States[2], err = parseGitStatusHexString(data); err != nil {
-			return nil, err
-		}
-		ret.Status = GitStatus_Unmerged
-		ret.Path, err = parseGitStatusStringWithSpace(data)
-		if err != nil {
-			return nil, err
-		}
-	default:
-		return nil, errors.New("Invalid status type" + string(statusType))
-	}
-	return &ret, nil
-}
-
-func parseGitStatusData(data io.ByteReader) ([]GitStatusData, error) {
-	ret := make([]GitStatusData, 0, 10)
-	for {
-		data, err := parseSingleStatusEntry(data)
-		if err != nil {
-			return nil, err
-		} else if data == nil {
-			break
-		}
-
-		ret = append(ret, *data)
-	}
-	return ret, nil
-}
-
-func (e *GitHandlerImpl) GitStatus(cwd string) (ret []GitStatusData, err error) {
-	LogDebug("getting git-status()")
-
-	cmd := exec.Command("/usr/bin/git", "status", "--porcelain=2", "-z")
+func (e *GitHandlerImpl) GitExecWithDataParse(cwd string, dataprocessor func(io.ByteReader) (Data, error), gitcmd string, args ...string) (Data, error) {
+	LogDebug("getting", gitcmd)
+	args = append([]string{gitcmd}, args...)
+	cmd := exec.Command("/usr/bin/git", args...)
 	cmd.Env = []string{
 		"GIT_CEILING_DIRECTORIES=" + e.GitPath,
 		"GIT_LFS_SKIP_SMUDGE=1",
@@ -1126,7 +946,12 @@ func (e *GitHandlerImpl) GitStatus(cwd string) (ret []GitStatusData, err error)
 		LogError("Error running command", cmd.Args, err)
 	}
 
-	return parseGitStatusData(bufio.NewReader(bytes.NewReader(out)))
+	return dataprocessor(bytes.NewReader(out))
+}
+
+func (e *GitHandlerImpl) GitStatus(cwd string) (ret []GitStatusData, err error) {
+	data, err := e.GitExecWithDataParse(cwd, parseGitStatusData, "status", "--porcelain=2", "-z")
+	return data.([]GitStatusData), err
 }
 
 func (e *GitHandlerImpl) GitDiff(cwd, base, head string) (string, error) {
@@ -1151,3 +976,94 @@ func (e *GitHandlerImpl) GitDiff(cwd, base, head string) (string, error) {
 
 	return string(out), nil
 }
+
+func (e *GitHandlerImpl) GitDiffIndex(cwd, commit string) ([]GitDiffRawData, error) {
+	data, err := e.GitExecWithDataParse("diff-index", parseGitDiffIndexRawData, cwd, "diff-index", "-z", "--raw", "--full-index", "--submodule=short", "HEAD")
+	return data.([]GitDiffRawData), err
+}
+
+func (git *GitHandlerImpl) GitResolveSubmoduleFileConflict(cwd string) error {
+	status, err := git.GitStatus(cwd)
+	if err != nil {
+		return fmt.Errorf("Status failed: %w", err)
+	}
+
+	// we can only resolve conflicts with .gitmodules
+	for _, s := range status {
+		if s.Status == GitStatus_Unmerged {
+			if s.Path != ".gitmodules" {
+				return err
+			}
+
+			submodules, err := git.GitSubmoduleList(cwd, "HEAD")
+			if err != nil {
+				return fmt.Errorf("Failed to fetch submodules during merge resolution: %w", err)
+			}
+
+			// We need to adjust the `submodules` list by the pending changes to the index
+
+			s1, err := git.GitExecWithOutput(cwd, "cat-file", "blob", s.States[0])
+			if err != nil {
+				return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
+			}
+			s2, err := git.GitExecWithOutput(cwd, "cat-file", "blob", s.States[1])
+			if err != nil {
+				return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
+			}
+			s3, err := git.GitExecWithOutput(cwd, "cat-file", "blob", s.States[2])
+			if err != nil {
+				return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
+			}
+
+			subs1, err := ParseSubmodulesFile(strings.NewReader(s1))
+			if err != nil {
+				return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
+			}
+			subs2, err := ParseSubmodulesFile(strings.NewReader(s2))
+			if err != nil {
+				return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
+			}
+			subs3, err := ParseSubmodulesFile(strings.NewReader(s3))
+			if err != nil {
+				return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
+			}
+
+			for r := range submodules {
+				LogError(r)
+			}
+
+			// merge from subs3 (target), subs1 (orig), subs2 (2-nd base that is missing from target base)
+			// this will update submodules
+			mergedSubs := slices.Concat(subs1, subs2, subs3)
+
+			var filteredSubs []Submodule = make([]Submodule, 0, max(len(subs1), len(subs2), len(subs3)))
+		nextSub:
+			for subName := range submodules {
+
+				for i := range mergedSubs {
+					if path.Base(mergedSubs[i].Path) == subName {
+						filteredSubs = append(filteredSubs, mergedSubs[i])
+						continue nextSub
+					}
+				}
+				return fmt.Errorf("Cannot find submodule for path: %s", subName)
+			}
+
+			out, err := os.Create(path.Join(git.GetPath(), cwd, ".gitmodules"))
+			if err != nil {
+				return fmt.Errorf("Can't open .gitmodules for writing: %w", err)
+			}
+			if err = WriteSubmodules(filteredSubs, out); err != nil {
+				return fmt.Errorf("Can't write .gitmodules: %w", err)
+			}
+			if out.Close(); err != nil {
+				return fmt.Errorf("Can't close .gitmodules: %w", err)
+			}
+
+			git.GitExecOrPanic(cwd, "add", ".gitmodules")
+			git.GitExecOrPanic(cwd, "-c", "core.editor=true", "merge", "--continue")
+		}
+	}
+
+	return nil
+}

common/git_utils_test.go

@@ -24,6 +24,7 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"runtime/debug"
 	"slices"
 	"strings"
 	"testing"
@@ -93,6 +94,93 @@ func TestGitClone(t *testing.T) {
 	}
 }
 
+func TestSubmoduleConflictResolution(t *testing.T) {
+	tests := []struct {
+		name            string
+		checkout, merge string
+		result          string
+	}{
+		{
+			name:     "adding two submodules",
+			checkout: "base_add_b1",
+			merge:    "base_add_b2",
+			result: `[submodule "pkgA"]
+    path = pkgA
+    url = ../pkgA
+[submodule "pkgB"]
+    path = pkgB
+    url = ../pkgB
+[submodule "pkgC"]
+    path = pkgC
+    url = ../pkgC
+[submodule "pkgB1"]
+    path = pkgB1
+    url = ../pkgB1
+[submodule "pkgB2"]
+    path = pkgB2
+    url = ../pkgB2
+`,
+		},
+	}
+
+	d, err := os.MkdirTemp(os.TempDir(), "submoduletests")
+	if err != nil {
+		t.Fatal(err)
+	}
+	cwd, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	cmd := exec.Command(cwd + "/test_repo_setup.sh")
+	cmd.Dir = d
+	_, err = cmd.Output()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	gh, err := AllocateGitWorkTree(d, "test", "foo@example.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	success := true
+	noErrorOrFail := func(t *testing.T, err error) {
+		if err != nil {
+			t.Fatal(string(debug.Stack()), err)
+		}
+	}
+	for _, test := range tests {
+		success = t.Run(test.name, func(t *testing.T) {
+			git, err := gh.ReadExistingPath("prjgit")
+			if err != nil {
+				t.Fatal(err)
+			}
+			noErrorOrFail(t, git.GitExec("", "checkout", "-B", "test", "main"))
+			noErrorOrFail(t, git.GitExec("", "merge", "base_add_b1"))
+			err = git.GitExec("", "merge", "base_add_b2")
+			if err == nil {
+				t.Fatal("expected a conflict")
+			}
+			err = git.GitResolveSubmoduleFileConflict("")
+			if err != nil {
+				t.Fatal(err)
+			}
+			data, err := os.ReadFile(git.GetPath() + "/.gitmodules")
+			if err != nil {
+				t.Fatal("Cannot read .gitmodules.", err)
+			}
+
+			if string(data) != test.result {
+				t.Error("Expected", test.result, "but have", string(data))
+			}
+		}) && success
+	}
+
+	if success {
+		os.RemoveAll(d)
+	}
+}
+
 func TestGitMsgParsing(t *testing.T) {
 	t.Run("tree message with size 56", func(t *testing.T) {
 		const hdr = "f40888ea4515fe2e8eea617a16f5f50a45f652d894de3ad181d58de3aafb8f98 tree 56\x00"

common/pr.go

@@ -4,8 +4,6 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
-	"os"
-	"path"
 	"slices"
 	"strings"
 
@@ -407,80 +405,8 @@ func (rs *PRSet) Merge(gitea GiteaReviewUnrequester, git Git) error {
 
 	err = git.GitExec(DefaultGitPrj, "merge", "--no-ff", "-m", msg, prjgit.Head.Sha)
 	if err != nil {
-		status, statusErr := git.GitStatus(DefaultGitPrj)
-		if statusErr != nil {
-			return fmt.Errorf("Failed to merge: %w . Status also failed: %w", err, statusErr)
-		}
-
-		// we can only resolve conflicts with .gitmodules
-		for _, s := range status {
-			if s.Status == GitStatus_Unmerged {
-				panic("Can't handle conflicts yet")
-				if s.Path != ".gitmodules" {
-					return err
-				}
-
-				submodules, err := git.GitSubmoduleList(DefaultGitPrj, "MERGE_HEAD")
-				if err != nil {
-					return fmt.Errorf("Failed to fetch submodules during merge resolution: %w", err)
-				}
-				s1, err := git.GitExecWithOutput(DefaultGitPrj, "cat-file", "blob", s.States[0])
-				if err != nil {
-					return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
-				}
-				s2, err := git.GitExecWithOutput(DefaultGitPrj, "cat-file", "blob", s.States[1])
-				if err != nil {
-					return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
-				}
-				s3, err := git.GitExecWithOutput(DefaultGitPrj, "cat-file", "blob", s.States[2])
-				if err != nil {
-					return fmt.Errorf("Failed fetching data during .gitmodules merge resoulution: %w", err)
-				}
-
-				subs1, err := ParseSubmodulesFile(strings.NewReader(s1))
-				if err != nil {
-					return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
-				}
-				subs2, err := ParseSubmodulesFile(strings.NewReader(s2))
-				if err != nil {
-					return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
-				}
-				subs3, err := ParseSubmodulesFile(strings.NewReader(s3))
-				if err != nil {
-					return fmt.Errorf("Failed parsing submodule file [%s] in merge: %w", s.States[0], err)
-				}
-
-				// merge from subs3 (target), subs1 (orig), subs2 (2-nd base that is missing from target base)
-				// this will update submodules
-				mergedSubs := slices.Concat(subs1, subs2, subs3)
-
-				var filteredSubs []Submodule = make([]Submodule, 0, max(len(subs1), len(subs2), len(subs3)))
-			nextSub:
-				for subName := range submodules {
-
-					for i := range mergedSubs {
-						if path.Base(mergedSubs[i].Path) == subName {
-							filteredSubs = append(filteredSubs, mergedSubs[i])
-							continue nextSub
-						}
-					}
-					return fmt.Errorf("Cannot find submodule for path: %s", subName)
-				}
-
-				out, err := os.Create(path.Join(git.GetPath(), DefaultGitPrj, ".gitmodules"))
-				if err != nil {
-					return fmt.Errorf("Can't open .gitmodules for writing: %w", err)
-				}
-				if err = WriteSubmodules(filteredSubs, out); err != nil {
-					return fmt.Errorf("Can't write .gitmodules: %w", err)
-				}
-				if out.Close(); err != nil {
-					return fmt.Errorf("Can't close .gitmodules: %w", err)
-				}
-
-				git.GitExecOrPanic(DefaultGitPrj, "add", ".gitmodules")
-				git.GitExecOrPanic(DefaultGitPrj, "-c", "core.editor=true", "merge", "--continue")
-			}
+		if resolveError := git.GitResolveSubmoduleFileConflict(DefaultGitPrj); resolveError != nil {
+			return fmt.Errorf("Merge failed. (%w): %w", err, resolveError)
 		}
 	}
 

common/pr_test.go

@@ -15,6 +15,7 @@ import (
 	"src.opensuse.org/autogits/common/gitea-generated/models"
 	mock_common "src.opensuse.org/autogits/common/mock"
 )
+
 /*
 	func TestCockpit(t *testing.T) {
 		common.SetLoggingLevel(common.LogLevelDebug)
@@ -939,6 +940,7 @@ func TestPRMerge(t *testing.T) {
 			pr: &models.PullRequest{
 				Base: &models.PRBranchInfo{
 					Sha: "e8b0de43d757c96a9d2c7101f4bff404e322f53a1fa4041fb85d646110c38ad4", // "base_add_b1"
+					Name: "master",
 					Repo: &models.Repository{
 						Name: "prj",
 						Owner: &models.User{
@@ -959,6 +961,7 @@ func TestPRMerge(t *testing.T) {
 			pr: &models.PullRequest{
 				Base: &models.PRBranchInfo{
 					Sha: "4fbd1026b2d7462ebe9229a49100c11f1ad6555520a21ba515122d8bc41328a8",
+					Name: "master",
 					Repo: &models.Repository{
 						Name: "prj",
 						Owner: &models.User{
@@ -978,6 +981,7 @@ func TestPRMerge(t *testing.T) {
 		t.Run(test.name, func(t *testing.T) {
 			ctl := gomock.NewController(t)
 			mock := mock_common.NewMockGiteaPRTimelineFetcher(ctl)
+
 			reviewUnrequestMock := mock_common.NewMockGiteaReviewUnrequester(ctl)
 
 			reviewUnrequestMock.EXPECT().UnrequestReview(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Return(nil)