Support relative roots for monorepos (#72)

README.md

@@ -82,6 +82,18 @@ pre-commit:
       run: bundle exec rubocop --force-exclusion {all_files}
 ```
 
+* ### **Execute in sub-directory**
+If you want to execute the commands in a relative path
+
+```yml
+pre-commit:
+  commands:
+    backend-linter:
+      root: "api/" # Careful to have only trailing slash
+      glob: "*.rb" # glob filter
+      run: bundle exec rubocop {all_files}
+```
+
 * ### **Run scripts**
 
 If oneline commands are not enough, you can execute files. [Example](./docs/full_guide.md#bash-script-example).

cmd/run.go

@@ -40,6 +40,7 @@ var (
 )
 
 const (
+	rootConfigKey        string      = "root"
 	runnerConfigKey      string      = "runner"
 	runConfigKey         string      = "run" // alias for runner
 	runnerArgsConfigKey  string      = "runner_args"
@@ -195,6 +196,9 @@ func executeCommand(hooksGroup, commandName string, wg *sync.WaitGroup) {
 	files = FilterInclude(files, getCommandIncludeRegexp(hooksGroup, commandName)) // NOTE: confusing option, suppose delete it
 	files = FilterExclude(files, getCommandExcludeRegexp(hooksGroup, commandName))
 
+	cmdRoot := getRoot(hooksGroup, commandName)
+	files = FilterRelative(files, cmdRoot)
+
 	VerbosePrint("Files after filters: \n", files)
 
 	files_esc := []string{}
@@ -212,6 +216,10 @@ func executeCommand(hooksGroup, commandName string, wg *sync.WaitGroup) {
 	runner = strings.Replace(runner, subFiles, strings.Join(files, " "), -1)
 
 	command := exec.Command("sh", "-c", runner)
+	if cmdRoot != "" {
+		fullPath, _ := filepath.Abs(cmdRoot)
+		command.Dir = fullPath
+	}
 	command.Stdin = os.Stdin
 
 	if isSkipCommmand(hooksGroup, commandName) {
@@ -425,6 +433,11 @@ func getCommands(hooksGroup string) []string {
 	return keys
 }
 
+func getRoot(hooksGroup string, executableName string) string {
+	key := strings.Join([]string{hooksGroup, commandsConfigKey, executableName, rootConfigKey}, ".")
+	return viper.GetString(key)
+}
+
 func getCommandIncludeRegexp(hooksGroup, executableName string) string {
 	key := strings.Join([]string{hooksGroup, commandsConfigKey, executableName, includeConfigKey}, ".")
 	return viper.GetString(key)
@@ -515,6 +528,20 @@ func FilterGlob(vs []string, matcher string) []string {
 	return vsf
 }
 
+func FilterRelative(vs []string, matcher string) []string {
+	if matcher == "" {
+		return vs
+	}
+
+	vsf := make([]string, 0)
+	for _, v := range vs {
+		if strings.HasPrefix(v, matcher) {
+			vsf = append(vsf, strings.Replace(v, matcher, "./", 1))
+		}
+	}
+	return vsf
+}
+
 func FilterInclude(vs []string, matcher string) []string {
 	if matcher == "" {
 		return vs

cmd/run_windows.go

@@ -41,6 +41,7 @@ var (
 )
 
 const (
+	rootConfigKey        string      = "root"
 	runnerConfigKey      string      = "runner"
 	runConfigKey         string      = "run" // alias for runner
 	runnerArgsConfigKey  string      = "runner_args"
@@ -190,6 +191,9 @@ func executeCommand(hooksGroup, commandName string, wg *sync.WaitGroup) {
 	files = FilterInclude(files, getCommandIncludeRegexp(hooksGroup, commandName)) // NOTE: confusing option, suppose delete it
 	files = FilterExclude(files, getCommandExcludeRegexp(hooksGroup, commandName))
 
+	cmdRoot := getRoot(hooksGroup, commandName)
+	files = FilterRelative(files, cmdRoot)
+
 	VerbosePrint("Files after filters: \n", files)
 
 	files_esc := []string{}
@@ -227,6 +231,10 @@ func executeCommand(hooksGroup, commandName string, wg *sync.WaitGroup) {
 
 	runnerArg := strings.Split(runner, " ")
 	command := exec.Command(runnerArg[0], runnerArg[1:]...)
+	if cmdRoot != "" {
+		fullPath, _ := filepath.Abs(cmdRoot)
+		command.Dir = fullPath
+	}
 	command.Stdin = os.Stdin
 	command.Stdout = os.Stdout // win specific
 	command.Stderr = os.Stderr // win specific
@@ -414,6 +422,11 @@ func getCommands(hooksGroup string) []string {
 	return keys
 }
 
+func getRoot(hooksGroup string, executableName string) string {
+	key := strings.Join([]string{hooksGroup, commandsConfigKey, executableName, rootConfigKey}, ".")
+	return viper.GetString(key)
+}
+
 func getCommandIncludeRegexp(hooksGroup, executableName string) string {
 	key := strings.Join([]string{hooksGroup, commandsConfigKey, executableName, includeConfigKey}, ".")
 	return viper.GetString(key)
@@ -504,6 +517,20 @@ func FilterGlob(vs []string, matcher string) []string {
 	return vsf
 }
 
+func FilterRelative(vs []string, matcher string) []string {
+	if matcher == "" {
+		return vs
+	}
+
+	vsf := make([]string, 0)
+	for _, v := range vs {
+		if strings.HasPrefix(v, matcher) {
+			vsf = append(vsf, strings.Replace(v, matcher, "./", 1))
+		}
+	}
+	return vsf
+}
+
 func FilterInclude(vs []string, matcher string) []string {
 	if matcher == "" {
 		return vs

cmd/version.go

@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	version string = "0.6.7"
+	version string = "0.7.0"
 )
 
 // versionCmd represents the version command