Fix Bitbucket line highlighting URLs

pkg/giturl/giturl.go

@@ -15,10 +15,11 @@ import (
 type provider string
 
 const (
-	providerGithub    provider = "Github"
-	providerGitlab    provider = "Gitlab"
-	providerBitbucket provider = "Bitbucket"
-	providerAzure     provider = "Azure"
+	providerGithub          provider = "Github"
+	providerGitlab          provider = "Gitlab"
+	providerBitbucket       provider = "Bitbucket"
+	providerBitbucketServer provider = "BitbucketServer"
+	providerAzure           provider = "Azure"
 
 	urlGithub    = "github.com/"
 	urlGitlab    = "gitlab.com/"
@@ -36,11 +37,25 @@ func determineProvider(repo string) provider {
 		return providerBitbucket
 	case strings.Contains(repo, urlAzure):
 		return providerAzure
+	case isBitbucketServerURL(repo):
+		return providerBitbucketServer
 	default:
 		return ""
 	}
 }
 
+// isBitbucketServerURL detects Bitbucket Server/Data Center URLs by their
+// distinctive /projects/{KEY}/repos/{SLUG}/... path structure.
+// See: https://developer.atlassian.com/server/bitbucket/rest/v1002/intro/#about
+// See: https://community.atlassian.com/forums/Bitbucket-questions/Bitbucket-Hyperlinking-to-source-code-in-Bitbucket/qaq-p/618967
+func isBitbucketServerURL(rawURL string) bool {
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return false
+	}
+	return strings.Contains(u.Path, "/projects/") && strings.Contains(u.Path, "/repos/")
+}
+
 func NormalizeBitbucketRepo(repoURL string) (string, error) {
 	if !strings.HasPrefix(repoURL, "https") {
 		return "", errors.New("Bitbucket requires https repo urls: e.g. https://bitbucket.org/org/repo.git")
@@ -127,7 +142,11 @@ func GenerateLink(repo, commit, file string, line int64) string {
 
 	switch determineProvider(repo) {
 	case providerBitbucket:
-		return repo[:len(repo)-4] + "/commits/" + commit
+		baseLink := repo[:len(repo)-4] + "/src/" + commit + "/" + file
+		if line > 0 {
+			baseLink += "#lines-" + strconv.FormatInt(line, 10)
+		}
+		return baseLink
 
 	case providerAzure:
 		// Azure Repos format: ?path=/file&version=GC<commit>&line=N&lineEnd=N+1&lineStartColumn=1
@@ -192,7 +211,10 @@ func GenerateLink(repo, commit, file string, line int64) string {
 	}
 }
 
-var linePattern = regexp.MustCompile(`L\d+`)
+var (
+	linePattern        = regexp.MustCompile(`L\d+`)
+	bbCloudLinePattern = regexp.MustCompile(`lines-\d+(:\d+)?`)
+)
 
 // UpdateLinkLineNumber updates the line number in a repository link.
 // Used post-link generation to refine reported issue locations within large scanned blocks.
@@ -213,9 +235,17 @@ func UpdateLinkLineNumber(ctx context.Context, link string, newLine int64) strin
 
 	switch determineProvider(link) {
 	case providerBitbucket:
-		// For Bitbucket, it doesn't support line links (based on the GenerateLink function).
-		// So we don't need to change anything.
-		return link
+		// Bitbucket Cloud uses #lines-N format for source file views.
+		fragment := "lines-" + strconv.FormatInt(newLine, 10)
+		if bbCloudLinePattern.MatchString(parsedURL.Fragment) {
+			parsedURL.Fragment = bbCloudLinePattern.ReplaceAllString(parsedURL.Fragment, fragment)
+		} else {
+			parsedURL.Fragment = fragment
+		}
+
+	case providerBitbucketServer:
+		// Bitbucket Server/Data Center uses a bare line number as fragment: #N
+		parsedURL.Fragment = strconv.FormatInt(newLine, 10)
 
 	case providerAzure:
 		// For Azure, line numbers use query parameters: ?line=N&lineEnd=N+1&lineStartColumn=1

pkg/giturl/giturl_test.go

@@ -171,6 +171,33 @@ func TestGenerateLink(t *testing.T) {
 			},
 			want: "https://dev.azure.com/org/project/_git/repo?version=GCabcdef",
 		},
+		{
+			name: "bitbucket cloud link gen",
+			args: args{
+				repo:   "https://bitbucket.org/org/repo.git",
+				commit: "abc123",
+				file:   "main.go",
+			},
+			want: "https://bitbucket.org/org/repo/src/abc123/main.go",
+		},
+		{
+			name: "bitbucket cloud link gen with line",
+			args: args{
+				repo:   "https://bitbucket.org/org/repo.git",
+				commit: "abc123",
+				file:   "main.go",
+				line:   int64(19),
+			},
+			want: "https://bitbucket.org/org/repo/src/abc123/main.go#lines-19",
+		},
+		{
+			name: "bitbucket cloud link gen - no file",
+			args: args{
+				repo:   "https://bitbucket.org/org/repo.git",
+				commit: "abc123",
+			},
+			want: "https://bitbucket.org/org/repo/src/abc123/",
+		},
 		{
 			name: "Unknown provider on-prem instance",
 			args: args{
@@ -270,12 +297,36 @@ func TestUpdateLinkLineNumber(t *testing.T) {
 		wantErr bool
 	}{
 		{
-			name: "Update bitbucket, no line number supported",
+			name: "Update Bitbucket Cloud link with line",
 			args: args{
-				link:    "https://bitbucket.org/org/repo/blob/xyz123/main.go",
+				link:    "https://bitbucket.org/org/repo/src/xyz123/main.go",
 				newLine: int64(10),
 			},
-			want: "https://bitbucket.org/org/repo/blob/xyz123/main.go",
+			want: "https://bitbucket.org/org/repo/src/xyz123/main.go#lines-10",
+		},
+		{
+			name: "Update Bitbucket Cloud link - replace existing line",
+			args: args{
+				link:    "https://bitbucket.org/org/repo/src/xyz123/main.go#lines-5",
+				newLine: int64(10),
+			},
+			want: "https://bitbucket.org/org/repo/src/xyz123/main.go#lines-10",
+		},
+		{
+			name: "Update Bitbucket Server link with line",
+			args: args{
+				link:    "https://enterprise.example.com/projects/PROJ/repos/repo/browse/main.go?at=xyz123",
+				newLine: int64(10),
+			},
+			want: "https://enterprise.example.com/projects/PROJ/repos/repo/browse/main.go?at=xyz123#10",
+		},
+		{
+			name: "Update Bitbucket Server link - replace existing line",
+			args: args{
+				link:    "https://enterprise.example.com/projects/PROJ/repos/repo/browse/main.go?at=xyz123#5",
+				newLine: int64(20),
+			},
+			want: "https://enterprise.example.com/projects/PROJ/repos/repo/browse/main.go?at=xyz123#20",
 		},
 		{
 			name: "Update github link with line",