ensure that v fmt can be run over most .v files on each PR

tools/vtest-compiler.v

@@ -17,21 +17,13 @@ fn main() {
 	v_test_compiler(args_string.all_before('test-compiler'))
 }
 
-fn v_test_compiler(vargs string){
-	v_test_compiler2(vargs)
-	//make_sure_vfmt_was_run()
-}
-
-fn v_test_compiler2(vargs string){
-
+fn v_test_compiler(vargs string) {
 	vexe := testing.vexe_path()
 	parent_dir := filepath.dir(vexe)
-	testing.vlib_should_be_present( parent_dir )
-
+	testing.vlib_should_be_present(parent_dir)
 	// Changing the current directory is needed for some of the compiler tests,
 	// compiler/tests/local_test.v and compiler/tests/repl/repl_test.v
-	os.chdir( parent_dir )
-
+	os.chdir(parent_dir)
 	/*
 	if !os.exists(parent_dir + '/v.v') {
 		eprintln('v.v is missing, it must be next to the V executable')
@@ -50,22 +42,16 @@ fn v_test_compiler2(vargs string){
 			eprintln('v.c can be compiled without warnings. This is good :)')
 		}
 	}
-
 	building_tools_failed := testing.v_build_failing(vargs, 'tools')
-
 	eprintln('\nTesting all _test.v files...')
-	mut compiler_test_session := testing.new_test_session( vargs )
+	mut compiler_test_session := testing.new_test_session(vargs)
 	compiler_test_session.files << os.walk_ext(parent_dir, '_test.v')
 	compiler_test_session.test()
-	eprintln( compiler_test_session.benchmark.total_message('running V tests') )
-
+	eprintln(compiler_test_session.benchmark.total_message('running V tests'))
 	eprintln('')
 	building_examples_failed := testing.v_build_failing(vargs, 'examples')
-
 	eprintln('')
-	building_live_failed := testing.v_build_failing(vargs + '-live',
-                                    filepath.join( 'examples', 'hot_reload'))
-
+	building_live_failed := testing.v_build_failing(vargs + '-live', filepath.join('examples','hot_reload'))
 	eprintln('')
 	v_module_install_cmd := '$vexe install nedpals.args'
 	eprintln('\nInstalling a v module with: $v_module_install_cmd ')
@@ -78,25 +64,8 @@ fn v_test_compiler2(vargs string){
 		eprintln('v failed to install a test module')
 	}
 	vmark.stop()
-	eprintln( 'Installing a v module took: ' + vmark.total_duration().str() + 'ms')
-
-	make_sure_vfmt_was_run()
-
-	if building_tools_failed ||
-     compiler_test_session.failed ||
-     building_examples_failed ||
-     building_live_failed {
+	eprintln('Installing a v module took: ' + vmark.total_duration().str() + 'ms')
+	if building_tools_failed || compiler_test_session.failed || building_examples_failed || building_live_failed {
 		exit(1)
 	}
-
-}
-
-fn make_sure_vfmt_was_run() {
-	files := os.walk_ext('.', '_test.v')
-	for file in files {
-		println(file)
-		os.exec('./vfmt $file') or {
-			println('$file failed')
-		}
-	}
 }

tools/vtest-fmt.v

@@ -0,0 +1,66 @@
+module main
+
+import (
+	os
+	testing
+	benchmark
+)
+
+fn main() {
+	args := os.args
+	args_string := args[1..].join(' ')
+	v_test_formatting(args_string.all_before('test-fmt'))
+}
+
+fn v_test_formatting(vargs string) {
+	// NB: vfmt have to be build with '-d vfmt' . V itself knows about this,
+	// and v will rebuild tools/vfmt, if it is missing.
+	// Removing the binaries below is needed, since the building tools step
+	// rebuilds all the tools without the special option needed by vfmt
+	// by simply compiling each of them with `v tools/{toolname}.v`
+	// os.rm('tools/vfmt')
+	// os.rm('tools/vfmt.exe')
+	mut files_able_to_be_formatted := []string
+	all_test_files := os.walk_ext('.', '.v')
+	known_failing_exceptions := ['./examples/vweb/vweb_example.v',
+	'./tools/gen_vc.v',
+	'./tutorials/code/blog/article.v',
+	'./tutorials/code/blog/blog.v',
+	'./vlib/arrays/arrays.v',
+	'./vlib/arrays/arrays_test.v',
+	'./vlib/builtin/js/hashmap.v',
+	'./vlib/compiler/tests/fn_variadic_test.v',
+	'./vlib/compiler/tests/generic_test.v',
+	'./vlib/compiler/preludes/live_main.v',
+	'./vlib/compiler/preludes/live_shared.v',
+	'./vlib/compiler/preludes/tests_assertions.v',
+	'./vlib/compiler/preludes/tests_with_stats.v',
+	'./vlib/crypto/aes/aes.v',
+	'./vlib/crypto/aes/aes_cbc.v',
+	'./vlib/crypto/aes/block_generic.v',
+	'./vlib/crypto/aes/const.v',
+	'./vlib/crypto/aes/cypher_generic.v',
+	'./vlib/crypto/rc4/rc4.v',
+	'./vlib/eventbus/eventbus_test.v',
+	'./vlib/flag/flag.v',
+	'./vlib/os/bare/bare_example_linux.v',
+	'./vlib/szip/szip.v',
+	'./vlib/ui/examples/users_gui/users.v',
+	'./vlib/vweb/assets/assets.v',
+	'./vlib/vweb/vweb.v',
+	]
+	for tfile in all_test_files {
+		if tfile in known_failing_exceptions {
+			continue
+		}
+		files_able_to_be_formatted << tfile
+	}
+	eprintln('Run "v fmt" over all .v files')
+	mut vfmt_test_session := testing.new_test_session('$vargs fmt')
+	vfmt_test_session.files << files_able_to_be_formatted
+	vfmt_test_session.test()
+	eprintln(vfmt_test_session.benchmark.total_message('running vfmt over V test files'))
+	if vfmt_test_session.benchmark.nfail > 0 {
+		panic('\nWARNING: v fmt failed ${vfmt_test_session.benchmark.nfail} times.\n')
+	}
+}