cmd/tools: add support for .editorconfig and improve `v init` to initialize missing files (#13230)

cmd/tools/vcreate.v

@@ -42,49 +42,55 @@ fn check_name(name string) string {
 }
 
 fn vmod_content(c Create) string {
-	return [
-		'Module {',
-		"	name: '$c.name'",
-		"	description: '$c.description'",
-		"	version: '$c.version'",
-		"	license: '$c.license'",
-		'	dependencies: []',
-		'}',
-		'',
-	].join_lines()
+	return "Module {
+	name: '$c.name'
+	description: '$c.description'
+	version: '$c.version'
+	license: '$c.license'
+	dependencies: []
+}
+"
 }
 
 fn main_content() string {
-	return [
-		'module main\n',
-		'fn main() {',
-		"	println('Hello World!')",
-		'}',
-		'',
-	].join_lines()
+	return "module main
+
+fn main() {
+	println('Hello World!')
+}
+"
 }
 
 fn gen_gitignore(name string) string {
-	return [
-		'# Binaries for programs and plugins',
-		'main',
-		'$name',
-		'*.exe',
-		'*.exe~',
-		'*.so',
-		'*.dylib',
-		'*.dll',
-		'vls.log',
-		'',
-	].join_lines()
+	return '# Binaries for programs and plugins
+main
+$name
+*.exe
+*.exe~
+*.so
+*.dylib
+*.dll
+vls.log
+'
 }
 
 fn gitattributes_content() string {
-	return [
-		'*.v linguist-language=V text=auto eol=lf',
-		'*.vv linguist-language=V text=auto eol=lf',
-		'',
-	].join_lines()
+	return '*.v linguist-language=V text=auto eol=lf
+*.vv linguist-language=V text=auto eol=lf
+'
+}
+
+fn editorconfig_content() string {
+	return '[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.v]
+indent_style = tab
+indent_size = 4
+'
 }
 
 fn (c &Create) write_vmod(new bool) {
@@ -102,9 +108,20 @@ fn (c &Create) write_main(new bool) {
 
 fn (c &Create) write_gitattributes(new bool) {
 	gitattributes_path := if new { '$c.name/.gitattributes' } else { '.gitattributes' }
+	if !new && os.exists(gitattributes_path) {
+		return
+	}
 	os.write_file(gitattributes_path, gitattributes_content()) or { panic(err) }
 }
 
+fn (c &Create) write_editorconfig(new bool) {
+	editorconfig_path := if new { '$c.name/.editorconfig' } else { '.editorconfig' }
+	if !new && os.exists(editorconfig_path) {
+		return
+	}
+	os.write_file(editorconfig_path, editorconfig_content()) or { panic(err) }
+}
+
 fn (c &Create) create_git_repo(dir string) {
 	// Create Git Repo and .gitignore file
 	if !os.is_dir('$dir/.git') {
@@ -151,23 +168,22 @@ fn create(args []string) {
 	c.write_vmod(true)
 	c.write_main(true)
 	c.write_gitattributes(true)
+	c.write_editorconfig(true)
 	c.create_git_repo(c.name)
 }
 
 fn init_project() {
-	if os.exists('v.mod') {
-		cerror('`v init` cannot be run on existing v modules')
-		exit(3)
-	}
 	mut c := Create{}
 	c.name = check_name(os.file_name(os.getwd()))
-	c.description = ''
-	c.write_vmod(false)
+	if !os.exists('v.mod') {
+		c.description = ''
+		c.write_vmod(false)
+		println('Change the description of your project in `v.mod`')
+	}
 	c.write_main(false)
 	c.write_gitattributes(false)
+	c.write_editorconfig(false)
 	c.create_git_repo('.')
-
-	println('Change the description of your project in `v.mod`')
 }
 
 fn main() {

cmd/tools/vcreate_test.v

@@ -43,6 +43,19 @@ fn init_and_check() ? {
 		'*.vv linguist-language=V text=auto eol=lf',
 		'',
 	].join_lines()
+
+	assert os.read_file('.editorconfig') ? == [
+		'[*]',
+		'charset = utf-8',
+		'end_of_line = lf',
+		'insert_final_newline = true',
+		'trim_trailing_whitespace = true',
+		'',
+		'[*.v]',
+		'indent_style = tab',
+		'indent_size = 4',
+		'',
+	].join_lines()
 }
 
 fn test_v_init() ? {
@@ -84,3 +97,33 @@ fn test_v_init_no_overwrite_gitignore() ? {
 
 	assert os.read_file('.gitignore') ? == 'blah'
 }
+
+fn test_v_init_no_overwrite_gitattributes_and_editorconfig() ? {
+	git_attributes_content := '*.v linguist-language=V text=auto eol=lf'
+	editor_config_content := '[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.v]
+indent_style = tab
+indent_size = 4
+'
+
+	dir := os.join_path(os.temp_dir(), test_path)
+	os.rmdir_all(dir) or {}
+	os.mkdir(dir) or {}
+	os.write_file('$dir/.gitattributes', git_attributes_content) ?
+	os.write_file('$dir/.editorconfig', editor_config_content) ?
+	defer {
+		os.rmdir_all(dir) or {}
+	}
+	os.chdir(dir) ?
+
+	vexe := @VEXE
+	os.execute_or_exit('$vexe init')
+
+	assert os.read_file('.gitattributes') ? == git_attributes_content
+	assert os.read_file('.editorconfig') ? == editor_config_content
+}