feat: add source dir optional configuration

action.yml

@@ -8,7 +8,12 @@ inputs:
     required: false
     default: ""
     type: string
-
+  source-dir:
+    description: Sets relative path to source files.
+    required: false
+    default: ""
+    type: string
+
   # Individual properties
   profile:
     description: Path to the coverage profile file. Overrides value from configuration.
@@ -132,6 +137,7 @@ runs:
   args:
     - --config=${{ inputs.config || '''''' }}
     - --profile=${{ inputs.profile || '''''' }}
+    - --source-dir=${{ inputs.source-dir || '''''' }}
     - --github-action-output=true
     - --threshold-file=${{ inputs.threshold-file }}
     - --threshold-package=${{ inputs.threshold-package }}

docs/github_action.md

@@ -38,6 +38,19 @@ Alternatively, if you don't need advanced configuration options from a config fi
 
 Note: When using a config file alongside action properties, specifying these parameters will override the corresponding values in the config file.
 
+## Source Directory
+
+Some projects, such as monorepos with multiple projects under the root directory, may require specifying the path to a project's source.
+In such cases, the `source-dir` property can be used to specify the source files location relative to the root directory.
+
+```yml
+  - name: check test coverage
+    uses: vladopajic/go-test-coverage@v2
+    with:
+      config: ./.testcoverage.yml
+      source-dir: ./some_project
+```
+
 ## Liberal Coverage Check
 
 The `go-test-coverage` GitHub Action can be configured to report the current test coverage without enforcing specific thresholds. To enable this functionality in your GitHub workflow, include the `continue-on-error: true` property in the job step configuration. This ensures that the workflow proceeds even if the coverage check fails.

main.go

@@ -27,6 +27,7 @@ type args struct {
 	ConfigPath         string `arg:"-c,--config"`
 	Profile            string `arg:"-p,--profile"              help:"path to coverage profile"`
 	LocalPrefix        string `arg:"-l,--local-prefix"` // deprecated
+	SourceDir          string `arg:"-s,--source-dir"`
 	GithubActionOutput bool   `arg:"-o,--github-action-output"`
 	ThresholdFile      int    `arg:"-f,--threshold-file"`
 	ThresholdPackage   int    `arg:"-k,--threshold-package"`
@@ -56,6 +57,7 @@ func newArgs() args {
 		ConfigPath:         ciDefaultString,
 		Profile:            ciDefaultString,
 		LocalPrefix:        ciDefaultString,
+		SourceDir:          ciDefaultString,
 		GithubActionOutput: false,
 		ThresholdFile:      ciDefaultInt,
 		ThresholdPackage:   ciDefaultInt,
@@ -102,6 +104,10 @@ func (a *args) overrideConfig(cfg testcoverage.Config) (testcoverage.Config, err
 		cfg.LocalPrefixDeprecated = a.LocalPrefix
 	}
 
+	if !isCIDefaultString(a.SourceDir) {
+		cfg.SourceDir = a.SourceDir
+	}
+
 	if !isCIDefaultInt(a.ThresholdFile) {
 		cfg.Threshold.File = a.ThresholdFile
 	}

pkg/testcoverage/check.go

@@ -74,7 +74,7 @@ func GenerateCoverageStats(cfg Config) ([]coverage.Stats, error) {
 	return coverage.GenerateCoverageStats(coverage.Config{ //nolint:wrapcheck // err wrapped above
 		Profiles:     strings.Split(cfg.Profile, ","),
 		ExcludePaths: cfg.Exclude.Paths,
-		RootDir:      cfg.RootDir,
+		SourceDir:    cfg.SourceDir,
 	})
 }
 

pkg/testcoverage/check_test.go

@@ -22,8 +22,8 @@ const (
 	breakdownOK  = testdataDir + testdata.BreakdownOK
 	breakdownNOK = testdataDir + testdata.BreakdownNOK
 
-	prefix  = "github.com/vladopajic/go-test-coverage/v2"
-	rootDir = "../../"
+	prefix    = "github.com/vladopajic/go-test-coverage/v2"
+	sourceDir = "../../"
 )
 
 func TestCheck(t *testing.T) {
@@ -60,7 +60,7 @@ func TestCheck(t *testing.T) {
 		t.Parallel()
 
 		buf := &bytes.Buffer{}
-		cfg := Config{Profile: profileOK, Threshold: Threshold{Total: 65}, RootDir: rootDir}
+		cfg := Config{Profile: profileOK, Threshold: Threshold{Total: 65}, SourceDir: sourceDir}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
 		assertGithubActionErrorsCount(t, buf.String(), 0)
@@ -79,7 +79,7 @@ func TestCheck(t *testing.T) {
 			Exclude: Exclude{
 				Paths: []string{`cdn\.go$`, `github\.go$`, `cover\.go$`, `check\.go$`, `path\.go$`},
 			},
-			RootDir: rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
@@ -92,7 +92,7 @@ func TestCheck(t *testing.T) {
 		t.Parallel()
 
 		buf := &bytes.Buffer{}
-		cfg := Config{Profile: profileOK, Threshold: Threshold{Total: 100}, RootDir: rootDir}
+		cfg := Config{Profile: profileOK, Threshold: Threshold{Total: 100}, SourceDir: sourceDir}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
 		assertGithubActionErrorsCount(t, buf.String(), 0)
@@ -113,7 +113,7 @@ func TestCheck(t *testing.T) {
 			Profile:   profileOK,
 			Threshold: Threshold{File: 100},
 			Override:  []Override{{Threshold: 10, Path: "^pkg"}},
-			RootDir:   rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
@@ -131,7 +131,7 @@ func TestCheck(t *testing.T) {
 			Profile:   profileOK,
 			Threshold: Threshold{File: 10},
 			Override:  []Override{{Threshold: 100, Path: "^pkg"}},
-			RootDir:   rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -153,7 +153,7 @@ func TestCheck(t *testing.T) {
 			Profile:   profileOK,
 			Threshold: Threshold{File: 70},
 			Override:  []Override{{Threshold: 60, Path: "pkg/testcoverage/badgestorer/github.go"}},
-			RootDir:   rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
@@ -171,7 +171,7 @@ func TestCheck(t *testing.T) {
 			Profile:   profileOK,
 			Threshold: Threshold{File: 70},
 			Override:  []Override{{Threshold: 80, Path: "pkg/testcoverage/badgestorer/github.go"}},
-			RootDir:   rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -195,7 +195,7 @@ func TestCheck(t *testing.T) {
 			Badge: Badge{
 				FileName: t.TempDir(), // should failed because this is dir
 			},
-			RootDir: rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -209,7 +209,7 @@ func TestCheck(t *testing.T) {
 		cfg := Config{
 			Profile:           profileOK,
 			BreakdownFileName: t.TempDir(), // should failed because this is dir
-			RootDir:           rootDir,
+			SourceDir:         sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -223,7 +223,7 @@ func TestCheck(t *testing.T) {
 		cfg := Config{
 			Profile:           profileOK,
 			BreakdownFileName: t.TempDir() + "/breakdown.testcoverage",
-			RootDir:           rootDir,
+			SourceDir:         sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
@@ -246,7 +246,7 @@ func TestCheck(t *testing.T) {
 			Diff: Diff{
 				BaseBreakdownFileName: t.TempDir(), // should failed because this is dir
 			},
-			RootDir: rootDir,
+			SourceDir: sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -268,7 +268,7 @@ func TestCheckNoParallel(t *testing.T) {
 			Profile:            profileOK,
 			GithubActionOutput: true,
 			Threshold:          Threshold{Total: 100},
-			RootDir:            rootDir,
+			SourceDir:          sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)
@@ -283,7 +283,7 @@ func TestCheckNoParallel(t *testing.T) {
 			Profile:            profileOK,
 			GithubActionOutput: true,
 			Threshold:          Threshold{Total: 10},
-			RootDir:            rootDir,
+			SourceDir:          sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.True(t, pass)
@@ -302,7 +302,7 @@ func TestCheckNoParallel(t *testing.T) {
 			Profile:            profileOK,
 			GithubActionOutput: true,
 			Threshold:          Threshold{Total: 100},
-			RootDir:            rootDir,
+			SourceDir:          sourceDir,
 		}
 		pass := Check(buf, cfg)
 		assert.False(t, pass)

pkg/testcoverage/config.go

@@ -24,14 +24,14 @@ var (
 type Config struct {
 	Profile               string     `yaml:"profile"`
 	LocalPrefixDeprecated string     `yaml:"-"`
+	SourceDir             string     `yaml:"-"`
 	Threshold             Threshold  `yaml:"threshold"`
 	Override              []Override `yaml:"override,omitempty"`
 	Exclude               Exclude    `yaml:"exclude"`
 	BreakdownFileName     string     `yaml:"breakdown-file-name"`
 	GithubActionOutput    bool       `yaml:"github-action-output"`
 	Diff                  Diff       `yaml:"diff"`
 	Badge                 Badge      `yaml:"-"`
-	RootDir               string     `yaml:"-"`
 }
 
 type Threshold struct {

pkg/testcoverage/coverage/cover.go

@@ -21,7 +21,7 @@ const IgnoreText = "coverage-ignore"
 type Config struct {
 	Profiles     []string
 	ExcludePaths []string
-	RootDir      string
+	SourceDir    string
 }
 
 func GenerateCoverageStats(cfg Config) ([]Stats, error) {
@@ -30,7 +30,7 @@ func GenerateCoverageStats(cfg Config) ([]Stats, error) {
 		return nil, fmt.Errorf("parsing profiles: %w", err)
 	}
 
-	files, err := findFiles(profiles, cfg.RootDir)
+	files, err := findFiles(profiles, cfg.SourceDir)
 	if err != nil {
 		return nil, err
 	}
@@ -121,17 +121,7 @@ func findFiles(profiles []*cover.Profile, rootDir string) (map[string]fileInfo,
 	return result, nil
 }
 
-func defaultRootDir(rootDir string) string {
-	if rootDir == "" {
-		rootDir = "."
-	}
-
-	return rootDir
-}
-
 func findFileCreator(rootDir string) func(file string) (string, string, bool) {
-	rootDir = defaultRootDir(rootDir)
-
 	cache := make(map[string]*build.Package)
 	findBuildImport := func(file string) (string, string, bool) {
 		dir, file := filepath.Split(file)
@@ -155,6 +145,7 @@ func findFileCreator(rootDir string) func(file string) (string, string, bool) {
 		return file, noPrefixName, err == nil
 	}
 
+	rootDir = defaultRootDir(rootDir)
 	prefix := findModuleDirective(rootDir)
 	files := listAllFiles(rootDir)
 	findWalk := func(file, prefix string) (string, string, bool) {
@@ -177,9 +168,24 @@ func findFileCreator(rootDir string) func(file string) (string, string, bool) {
 	}
 }
 
+func defaultRootDir(rootDir string) string {
+	if rootDir == "" {
+		rootDir = "."
+	}
+
+	return rootDir
+}
+
 func listAllFiles(rootDir string) []fileInfo {
 	files := make([]fileInfo, 0)
 
+	makeName := func(file string) string {
+		name, _ := strings.CutPrefix(file, rootDir)
+		name = path.NormalizeForTool(name)
+
+		return name
+	}
+
 	//nolint:errcheck // error ignored because there is fallback mechanism for finding files
 	filepath.Walk(rootDir, func(file string, info os.FileInfo, err error) error {
 		if err != nil { // coverage-ignore
@@ -189,12 +195,9 @@ func listAllFiles(rootDir string) []fileInfo {
 		if !info.IsDir() &&
 			strings.HasSuffix(file, ".go") &&
 			!strings.HasSuffix(file, "_test.go") {
-			name, _ := strings.CutPrefix(file, rootDir)
-			name = path.NormalizeForTool(name)
-
 			files = append(files, fileInfo{
 				path: file,
-				name: name,
+				name: makeName(file),
 			})
 		}
 

pkg/testcoverage/coverage/cover_test.go

@@ -25,7 +25,7 @@ const (
 	prefix        = "github.com/vladopajic/go-test-coverage/v2"
 	coverFilename = "pkg/testcoverage/coverage/cover.go"
 
-	rootDir = "../../../"
+	sourceDir = "../../../"
 )
 
 func Test_GenerateCoverageStats(t *testing.T) {
@@ -42,16 +42,16 @@ func Test_GenerateCoverageStats(t *testing.T) {
 
 	// should get error parsing invalid profile file
 	stats, err = GenerateCoverageStats(Config{
-		Profiles: []string{profileNOK},
-		RootDir:  rootDir,
+		Profiles:  []string{profileNOK},
+		SourceDir: sourceDir,
 	})
 	assert.Error(t, err)
 	assert.Empty(t, stats)
 
 	// should be okay to read valid profile
 	stats1, err := GenerateCoverageStats(Config{
-		Profiles: []string{profileOK},
-		RootDir:  rootDir,
+		Profiles:  []string{profileOK},
+		SourceDir: sourceDir,
 	})
 	assert.NoError(t, err)
 	assert.NotEmpty(t, stats1)
@@ -60,7 +60,7 @@ func Test_GenerateCoverageStats(t *testing.T) {
 	stats2, err := GenerateCoverageStats(Config{
 		Profiles:     []string{profileOK},
 		ExcludePaths: []string{`cover\.go$`},
-		RootDir:      rootDir,
+		SourceDir:    sourceDir,
 	})
 	assert.NoError(t, err)
 	assert.NotEmpty(t, stats2)
@@ -69,17 +69,17 @@ func Test_GenerateCoverageStats(t *testing.T) {
 
 	// should have total coverage because of second profile
 	stats3, err := GenerateCoverageStats(Config{
-		Profiles: []string{profileOK, profileOKFull},
-		RootDir:  rootDir,
+		Profiles:  []string{profileOK, profileOKFull},
+		SourceDir: sourceDir,
 	})
 	assert.NoError(t, err)
 	assert.NotEmpty(t, stats3)
 	assert.Equal(t, 100, StatsCalcTotal(stats3).CoveredPercentage())
 
 	// should not have `badge/generate.go` in statistics because it has no statements
 	stats4, err := GenerateCoverageStats(Config{
-		Profiles: []string{profileOKNoStatements},
-		RootDir:  rootDir,
+		Profiles:  []string{profileOKNoStatements},
+		SourceDir: sourceDir,
 	})
 	assert.NoError(t, err)
 	assert.Len(t, stats4, 1)