⚡ QD-9824 Add support HEAD~1 syntax for go-git. Copy changes.json to …

…log folder.

core/system.go

@@ -435,6 +435,11 @@ func writeChangesFile(options *QodanaOptions, start string, end string) (string,
 		return "", fmt.Errorf("failed to write scope file: %w", err)
 	}
 
+	err = platform.CopyFile(file.Name(), filepath.Join(options.LogDirPath(), "changes.json"))
+	if err != nil {
+		return "", err
+	}
+
 	return file.Name(), nil
 }
 

platform/git_changes.go

@@ -24,6 +24,7 @@ import (
 	"github.com/go-git/go-git/v5/plumbing/object"
 	"path/filepath"
 	"regexp"
+	"sort"
 	"strings"
 )
 
@@ -74,12 +75,22 @@ func getChangedFilesBetweenCommits(repo *git.Repository, cwd, hash1, hash2 strin
 	if err != nil {
 		return ChangedFiles{}, fmt.Errorf("failed to get absolute path of root folder %s: %v", cwd, err)
 	}
-	commit1, err := repo.CommitObject(plumbing.NewHash(hash1))
+	revision1, err := repo.ResolveRevision(plumbing.Revision(hash1))
+	if err != nil {
+		return ChangedFiles{}, fmt.Errorf("failed to resolve revision %s: %v", hash1, err)
+	}
+
+	revision2, err := repo.ResolveRevision(plumbing.Revision(hash2))
+	if err != nil {
+		return ChangedFiles{}, fmt.Errorf("failed to resolve revision %s: %v", hash2, err)
+	}
+
+	commit1, err := repo.CommitObject(*revision1)
 	if err != nil {
 		return ChangedFiles{}, fmt.Errorf("failed to find commit %s: %v", hash1, err)
 	}
 
-	commit2, err := repo.CommitObject(plumbing.NewHash(hash2))
+	commit2, err := repo.CommitObject(*revision2)
 	if err != nil {
 		return ChangedFiles{}, fmt.Errorf("failed to find commit %s: %v", hash2, err)
 	}
@@ -148,6 +159,10 @@ func getChangedFilesBetweenCommits(repo *git.Repository, cwd, hash1, hash2 strin
 		files = append(files, file)
 	}
 
+	sort.Slice(files, func(i, j int) bool {
+		return files[i].Path < files[j].Path
+	})
+
 	return ChangedFiles{Files: files}, nil
 }
 

platform/git_changes_test.go

@@ -149,12 +149,12 @@ func TestChangesCalculation(t *testing.T) {
 
 	for _, tc := range testCases {
 		t.Run(tc.action, func(t *testing.T) {
-			repo, hashBefore, hashAfter := createRepo(t, tc)
+			repo := createRepo(t, tc)
 			defer func(path string) {
 				_ = os.RemoveAll(path)
 			}(repo)
 
-			commits, err := GitChangedFiles(repo, hashBefore, hashAfter)
+			commits, err := GitChangedFiles(repo, "HEAD~1", "HEAD")
 			for _, file := range commits.Files {
 				file.Path = filepath.Base(file.Path)
 			}
@@ -167,7 +167,7 @@ func TestChangesCalculation(t *testing.T) {
 	}
 }
 
-func createRepo(t *testing.T, tc TestConfig) (string, string, string) {
+func createRepo(t *testing.T, tc TestConfig) string {
 	// Step 1: Create a new directory for the repository
 	repoDir, err := os.MkdirTemp("", "testrepo")
 	assert.NoError(t, err)
@@ -200,8 +200,6 @@ func createRepo(t *testing.T, tc TestConfig) (string, string, string) {
 	err = cmd.Run()
 	assert.NoError(t, err)
 
-	initHash := getCurrentHash(t, repoDir)
-
 	// Step 4: Perform the action specified
 	switch tc.action {
 	case "modify":
@@ -234,7 +232,7 @@ func createRepo(t *testing.T, tc TestConfig) (string, string, string) {
 	err = cmd.Run()
 	assert.NoError(t, err)
 
-	return repoDir, initHash, getCurrentHash(t, repoDir)
+	return repoDir
 }
 
 func getCurrentHash(t *testing.T, repoDir string) string {