From ec15bfb7d10a6a3fe654b8096854f80c7e005b93 Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Sun, 1 Dec 2019 11:50:13 +0200
Subject: [PATCH] v test v => v test-compiler

---
 .github/PULL_REQUEST_TEMPLATE                 |  10 +-
 .github/workflows/alpine.test.sh              |   2 +-
 .github/workflows/ci.yml                      |  12 +-
 .gitignore                                    |  10 ++
 examples/.gitignore                           |   5 +
 .../{ => modules}/some_module/some_module.v   |   0
 .../{ => modules}/automaton/automaton.v       |   0
 examples/log.v                                |   7 +-
 tools/.gitignore                              |   9 +
 tools/fast/fast.v                             |   4 +-
 tools/gen_vc.v                                |  30 ++--
 tools/modules/testing/common.v                | 126 ++++++++++++++
 tools/vbuild-examples.v                       |  14 ++
 tools/vbuild-tools.v                          |  14 ++
 tools/vcreate.v                               |   4 +-
 tools/vtest-compiler.v                        |  77 +++++++++
 tools/vtest.v                                 | 156 +-----------------
 v.v                                           |  20 +--
 vlib/compiler/cgen.v                          |   2 +-
 vlib/compiler/module_header.v                 |   2 +-
 vlib/compiler/vfmt.v                          |   2 +-
 vlib/compiler/x64/elf.v                       |   2 +-
 vlib/flag/flag.v                              |  21 ++-
 vlib/flag/flag_test.v                         |  17 ++
 vlib/log/log.v                                | 128 +++++++-------
 vlib/os/os.v                                  |  31 +++-
 vlib/os/os_test.v                             |   4 +-
 vlib/ui/{ui_lin.v => ui_linux.v}              |   0
 vlib/vweb/assets/assets.v                     |   2 +-
 29 files changed, 431 insertions(+), 280 deletions(-)
 rename examples/eventbus/{ => modules}/some_module/some_module.v (100%)
 rename examples/game_of_life/{ => modules}/automaton/automaton.v (100%)
 create mode 100644 tools/.gitignore
 create mode 100644 tools/modules/testing/common.v
 create mode 100644 tools/vbuild-examples.v
 create mode 100644 tools/vbuild-tools.v
 create mode 100644 tools/vtest-compiler.v
 rename vlib/ui/{ui_lin.v => ui_linux.v} (100%)

diff --git a/.github/PULL_REQUEST_TEMPLATE b/.github/PULL_REQUEST_TEMPLATE
index d08b8a9528..d32209bfd7 100644
--- a/.github/PULL_REQUEST_TEMPLATE
+++ b/.github/PULL_REQUEST_TEMPLATE
@@ -1,6 +1,7 @@
 **Please delete this information after reading it.*
 
-Please title your PR as follows: `time: fix foo bar`. Always start with the thing you are fixing, then describe the fix.
+Please title your PR as follows: `time: fix foo bar`. 
+Always start with the thing you are fixing, then describe the fix.
 Don't use past tense (e.g. "fixed foo bar").
 
 Explain what your PR does and why.
@@ -20,10 +21,13 @@ fn test_foo() {
 
 If you are fixing a bug, please add a test that covers it.
 
-Before submitting a PR, please run the tests with `v test v`, and make sure V can still compile itself. Run this twice:
-
+Before submitting a PR, please:
+  A) run the tests with `v test-compiler` .
+  B) make sure, that V can still compile itself:
+```shell
 ./v -o v v.v
 ./v -o v v.v
+```
 
 I try to process PRs as soon as possible. They should be handled within 24 hours.
 
diff --git a/.github/workflows/alpine.test.sh b/.github/workflows/alpine.test.sh
index 32f611ac80..784a849aa1 100755
--- a/.github/workflows/alpine.test.sh
+++ b/.github/workflows/alpine.test.sh
@@ -10,6 +10,6 @@ du -s .
 
 ls -lat 
 
-./v test v
+./v test-compiler
 
 echo "DONE"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec71d2ba3e..0ffda1dee8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
     - name: Build V using V
       run:  ./v -o v2 v.v && ./v2 -o v3 v.v
     - name: Test v->c
-      run: ./v test v
+      run: ./v test-compiler
 #    - name: Test v->js
 #      run: ./v -o hi.js examples/hello_v_js.v && node hi.js
     - name: Test symlink
@@ -58,7 +58,7 @@ jobs:
     - name: Build V
       run: make && ./v -cc gcc -o v v.v
     - name: Test V
-      run: ./v test v
+      run: ./v test-compiler
 #    - name: Test v->js
 #      run: ./v -o hi.js examples/hello_v_js.v && node hi.js
     - name: Build Vorum
@@ -110,7 +110,7 @@ jobs:
         sudo ln -s /var/tmp/tcc/bin/tcc /usr/local/bin/tcc
         tcc -version
         ./v -o v2 v.v # Make sure vtcc can build itself
-        ./v test v
+        ./v test-compiler
 
   ubuntu-musl:
     runs-on: ubuntu-18.04
@@ -124,7 +124,7 @@ jobs:
     - name: Build v
       run: make && ./v -cc musl-gcc -o v v.v
 #    - name: Test v->c
-#      run: ./v test v
+#      run: ./v test-compiler
 #    - name: Test v->js
 #      run: ./v -o hi.js examples/hello_v_js.v && node hi.js
 
@@ -142,7 +142,7 @@ jobs:
         .\make.bat -gcc
     - name: Test
       run: |
-        .\v.exe test v
+        .\v.exe test-compiler
       ## v.js dosent work on windows
         #.\v.exe -o hi.js examples/hello_v_js.v
         #node hi.js
@@ -164,7 +164,7 @@ jobs:
       env:
         VFLAGS: -cc msvc
       run: |
-        .\v.exe test v
+        .\v.exe test-compiler
       ## v.js dosent work on windows
         #.\v.exe -o hi.js examples/hello_v_js.v
         #node hi.js
diff --git a/.gitignore b/.gitignore
index cf118032f5..c47b41c540 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+fns.txt
 *.dSYM
 *_test
 /v
@@ -12,12 +13,18 @@
 /tools/vrepl.exe
 /tools/vtest
 /tools/vtest.exe
+/tools/vtest-compiler
+/tools/vtest-compiler.exe
 /tools/vup
 /tools/vup.exe
 /tools/vpm
 /tools/vpm.exe
 /tools/vcreate
 /tools/vcreate.exe
+/tools/vbuild-examples
+/tools/vbuild-examples.exe
+/tools/vbuild-tools
+/tools/vbuild-tools.exe
 *.exe
 *.o
 .*.c
@@ -38,3 +45,6 @@ vjs
 ._*
 .vrepl_temp.v
 a.out
+vlib/os/bare/bare_example_linux
+
+info.log
diff --git a/examples/.gitignore b/examples/.gitignore
index 45c94880f0..182d47571f 100644
--- a/examples/.gitignore
+++ b/examples/.gitignore
@@ -12,3 +12,8 @@
 /hello_v_js
 /fibonacci
 /sqlite
+empty_gg_freetype
+game_of_life/life_gg
+random_ips
+vweb/vweb_example
+x64/hello_world
diff --git a/examples/eventbus/some_module/some_module.v b/examples/eventbus/modules/some_module/some_module.v
similarity index 100%
rename from examples/eventbus/some_module/some_module.v
rename to examples/eventbus/modules/some_module/some_module.v
diff --git a/examples/game_of_life/automaton/automaton.v b/examples/game_of_life/modules/automaton/automaton.v
similarity index 100%
rename from examples/game_of_life/automaton/automaton.v
rename to examples/game_of_life/modules/automaton/automaton.v
diff --git a/examples/log.v b/examples/log.v
index 466439319c..cdcac94cde 100644
--- a/examples/log.v
+++ b/examples/log.v
@@ -1,7 +1,12 @@
 import log
 
 fn main() {
-	mut l := log.Log { log.LogLevel.info, 'info', true }
+	mut l := log.Log{}
+	l.set_level(log.INFO)
+	// Make a new file called info.log in the current folder
+	l.set_full_logpath('./info.log')
+	println('Please check the file: ${l.output_file_name} after this example crashes.')
+  
 	l.info('info')
 	l.warn('warn')
 	l.error('error')
diff --git a/tools/.gitignore b/tools/.gitignore
new file mode 100644
index 0000000000..fcb39ffda3
--- /dev/null
+++ b/tools/.gitignore
@@ -0,0 +1,9 @@
+gen_vc
+performance_compare
+vcreate
+vnames
+vpm
+vrepl
+vtest
+vtest-compiler
+vup
diff --git a/tools/fast/fast.v b/tools/fast/fast.v
index d5eaefb2e9..468fcbe692 100644
--- a/tools/fast/fast.v
+++ b/tools/fast/fast.v
@@ -39,7 +39,7 @@ fn main() {
 	commit_date := exec('git log -n1 --pretty="format:%at"')
 	message := exec('git log -n1 --pretty="format:%s"')
 	date := time.unix(commit_date.int())
-	out := os.create('table.html') or { panic(err) }
+	mut out := os.create('table.html') or { panic(err) }
 	// Place the new row on top
 	table =
 '<tr>
@@ -57,7 +57,7 @@ fn main() {
 	// Regenerate index.html
 	header := os.read_file('header.html') or { panic(err) }
 	footer := os.read_file('footer.html') or { panic(err) }
-	res := os.create('index.html') or { panic(err) }
+	mut res := os.create('index.html') or { panic(err) }
 	res.writeln(header)
 	res.writeln(table)
 	res.writeln(footer)
diff --git a/tools/gen_vc.v b/tools/gen_vc.v
index 267b054300..9404c5146c 100644
--- a/tools/gen_vc.v
+++ b/tools/gen_vc.v
@@ -45,7 +45,7 @@ const(
 	// name
 	app_name = 'gen_vc'
 	// version
-	app_version = '0.1.0'
+	app_version = '0.1.1'
 	// description
 	app_description = 'This tool regenerates V\'s bootstrap .c files every time the V master branch is updated.'
 	// assume something went wrong if file size less than this
@@ -114,17 +114,22 @@ fn main() {
  	fp.version(app_version)
  	fp.description(app_description)
  	fp.skip_executable()
-
+              
+	show_help:=fp.bool('help', false, 'Show this help screen\n')
 	flag_options := parse_flags(mut fp)
-
- 	_ = fp.finalize() or {
+  
+	if( show_help ){ println( fp.usage() ) exit(0) }
+  
+	fp.finalize() or {
  		eprintln(err)
  		println(fp.usage())
  		return
  	}
+  
 	// webhook server mode
 	if flag_options.serve {
-		vweb.run<WebhookServer>(flag_options.port)
+		app := WebhookServer{ gen_vc: new_gen_vc(flag_options) }
+		vweb.run(mut app, flag_options.port)
 	}
 	// cmd mode
 	else {
@@ -136,15 +141,14 @@ fn main() {
 
 // new GenVC
 fn new_gen_vc(flag_options FlagOptions) &GenVC {
+	mut logger := &log.Log{}
+	logger.set_level(log.DEBUG)
+	if flag_options.log_to == 'file' {
+		logger.set_full_logpath( flag_options.log_file )
+	}
 	return &GenVC{
-		// options
 		options: flag_options
-		// logger
-		logger: if flag_options.log_to == 'file' {
-			&log.Log{log.DEBUG, flag_options.log_file}
-		} else {
-			&log.Log{log.DEBUG, 'terminal'}
-		}
+		logger: logger
 	}
 }
 
@@ -175,7 +179,7 @@ fn parse_flags(fp mut flag.FlagParser) FlagOptions {
 		purge    : fp.bool('purge', false, 'force purge the local repositories')
 		port     : fp.int('port', int(server_port), 'port for web server to listen on')
 		log_to   : fp.string('log-to', log_to, 'log to is \'file\' or \'terminal\'')
-		log_file : fp.string('log_file', log_file, 'log file to use when log-to is \'file\'')
+		log_file : fp.string('log-file', log_file, 'log file to use when log-to is \'file\'')
 		dry_run  : fp.bool('dry-run', dry_run, 'when specified dont push anything to remote repo')
 	}
 }
diff --git a/tools/modules/testing/common.v b/tools/modules/testing/common.v
new file mode 100644
index 0000000000..64b5077078
--- /dev/null
+++ b/tools/modules/testing/common.v
@@ -0,0 +1,126 @@
+module testing
+
+import (
+	os
+	term
+	benchmark
+	filepath
+)
+
+pub struct TestSession {
+pub mut:
+	files []string
+	vexe string
+	vargs string
+	failed bool
+	benchmark benchmark.Benchmark
+
+	ok string
+	fail string
+}
+
+pub fn new_test_sesion(vargs string) TestSession {
+	return TestSession{
+		vexe: vexe_path()
+		vargs: vargs
+	}
+}
+
+pub fn vexe_path() string {
+	// NB: tools extracted from v require that the first
+	// argument to them to be the v executable location.
+	// They are usually launched by vlib/compiler/vtools.v,
+	// launch_tool/1 , which provides it.
+	return os.args[1]
+}
+
+
+pub fn (ts mut TestSession) init() {
+	ts.ok   = term.ok_message('OK')
+	ts.fail = term.fail_message('FAIL')
+	ts.benchmark = benchmark.new_benchmark()
+}
+
+pub fn (ts mut TestSession) test() {
+	ts.init()
+	show_stats := '-stats' in ts.vargs.split(' ')
+	for dot_relative_file in ts.files {
+		relative_file := dot_relative_file.replace('./', '')
+		file := os.realpath( relative_file )
+		$if windows {
+			if file.contains('sqlite') { continue }
+		}
+		$if msvc {
+			if file.contains('asm') { continue }
+		}
+		$if tinyc {
+			if file.contains('asm') { continue }
+		}
+		tmpc_filepath := file.replace('.v', '.tmp.c')
+
+		cmd := '"$ts.vexe" $ts.vargs "$file"'
+
+		ts.benchmark.step()
+		if show_stats {
+			println('-------------------------------------------------')
+			status := os.system(cmd)
+			if status == 0 {
+				ts.benchmark.ok()
+			}else{
+				ts.benchmark.fail()
+				ts.failed = true
+				continue
+			}
+		}else{
+			r := os.exec(cmd) or {
+				ts.benchmark.fail()
+				ts.failed = true
+				println(ts.benchmark.step_message('$relative_file ${ts.fail}'))
+				continue
+			}
+			if r.exit_code != 0 {
+				ts.benchmark.fail()
+				ts.failed = true
+				println(ts.benchmark.step_message('$relative_file ${ts.fail}\n`$file`\n (\n$r.output\n)'))
+			} else {
+				ts.benchmark.ok()
+				println(ts.benchmark.step_message('$relative_file ${ts.ok}'))
+			}
+		}
+		os.rm( tmpc_filepath )
+	}
+	ts.benchmark.stop()
+}
+
+pub fn vlib_should_be_present( parent_dir string ) {
+	vlib_dir := filepath.join( parent_dir, 'vlib' )
+	if !os.dir_exists( vlib_dir ){
+		println('$vlib_dir is missing, it must be next to the V executable')
+		exit(1)
+	}
+}
+
+pub fn v_build_failing(vargs string, folder string) bool {
+	main_label := 'Building $folder ...'
+	finish_label := 'building $folder'
+	vexe := vexe_path()
+	parent_dir := os.dir(vexe)
+	vlib_should_be_present( parent_dir )
+  
+	println(main_label)
+	mut session := new_test_sesion( vargs )
+	files := os.walk_ext(filepath.join(parent_dir, folder),'.v')
+	mains := files.filter(!it.contains('modules'))
+	mut rebuildable_mains := mains
+	if os.user_os() == 'windows' {
+		// on windows, an executable can not be rebuilt, while it is running
+		myself := os.executable().replace('.exe', '') + '.v'
+		mains_without_myself := mains.filter(!it.contains(myself))
+		rebuildable_mains = mains_without_myself // workaround a bug in it.contains generation
+	}
+	session.files << rebuildable_mains
+	session.test()
+	println( session.benchmark.total_message( finish_label ) )
+
+	return session.failed
+}
diff --git a/tools/vbuild-examples.v b/tools/vbuild-examples.v
new file mode 100644
index 0000000000..a8db8f075f
--- /dev/null
+++ b/tools/vbuild-examples.v
@@ -0,0 +1,14 @@
+module main
+
+import (
+	os
+	testing
+)  
+
+fn main() {
+	args := os.args
+	args_string := args[1..].join(' ')
+	if testing.v_build_failing(args_string.all_before('build-examples'), 'examples') {
+		exit(1)
+	}
+}
diff --git a/tools/vbuild-tools.v b/tools/vbuild-tools.v
new file mode 100644
index 0000000000..3c8d2de68f
--- /dev/null
+++ b/tools/vbuild-tools.v
@@ -0,0 +1,14 @@
+module main
+
+import (
+	os
+	testing
+)
+
+fn main() {
+	args := os.args
+	args_string := args[1..].join(' ')
+	if testing.v_build_failing(args_string.all_before('build-tools'), 'tools') {
+		exit(1)
+	}
+}
diff --git a/tools/vcreate.v b/tools/vcreate.v
index 3537383654..0a0806fef7 100644
--- a/tools/vcreate.v
+++ b/tools/vcreate.v
@@ -19,7 +19,7 @@ fn cerror(e string){
 }
 
 fn (c Create)write_vmod() {
-	vmod := os.create('${c.name}/v.mod') or { cerror(err) exit(1) }
+	mut vmod := os.create('${c.name}/v.mod') or { cerror(err) exit(1) }
 	mut vmod_content := []string
 	vmod_content << '#V Project#\n'
 	vmod_content << 'Module {'
@@ -31,7 +31,7 @@ fn (c Create)write_vmod() {
 }
 
 fn (c Create)write_main() {
-	main := os.create('${c.name}/${c.name}.v') or {	cerror(err) exit(2)	}
+	mut main := os.create('${c.name}/${c.name}.v') or {	cerror(err) exit(2)	}
 	mut main_content := []string
 	main_content << 'module main\n'
 	main_content << 'fn main() {'
diff --git a/tools/vtest-compiler.v b/tools/vtest-compiler.v
new file mode 100644
index 0000000000..1c34ef8811
--- /dev/null
+++ b/tools/vtest-compiler.v
@@ -0,0 +1,77 @@
+module main
+
+import (
+	os
+	testing
+	benchmark
+)  
+
+pub const (
+	v_modules_path = os.home_dir() + '.vmodules'
+)
+
+fn main() {
+	args := os.args
+	args_string := args[1..].join(' ')
+	v_test_compiler(args_string.all_before('test-compiler'))
+}
+
+fn v_test_compiler(vargs string){
+	vexe := testing.vexe_path()
+	parent_dir := os.dir(vexe)
+	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 )
+  
+	/*
+	if !os.file_exists(parent_dir + '/v.v') {
+		println('v.v is missing, it must be next to the V executable')
+		exit(1)
+	}
+	*/
+	
+	// Make sure v.c can be compiled without warnings
+	$if mac {
+		if os.file_exists('/v.v') {
+			os.system('$vexe -o v.c v.v')
+			if os.system('cc -Werror v.c') != 0 {
+				println('cc failed to build v.c without warnings')
+				exit(1)
+			}
+			println('v.c can be compiled without warnings. This is good :)')
+		}
+	}
+	
+	building_tools_failed := testing.v_build_failing(vargs, 'tools')
+	
+	println('\nTesting all _test.v files...')
+	mut compiler_test_session := testing.new_test_sesion( vargs )
+	compiler_test_session.files << os.walk_ext(parent_dir, '_test.v')
+	compiler_test_session.test()
+	println( compiler_test_session.benchmark.total_message('running V tests') )
+
+	println('')
+	building_examples_failed := testing.v_build_failing(vargs, 'examples')
+	
+	v_module_install_cmd := '$vexe install nedpals.args'
+	println('\nInstalling a v module with: $v_module_install_cmd ')
+	mut vmark := benchmark.new_benchmark()
+	ret := os.system(v_module_install_cmd)
+	if ret != 0 {
+		println('failed to run v install')
+		exit(1)
+	}
+	if !os.file_exists(v_modules_path + '/nedpals/args') {
+		println('v failed to install a test module')
+		exit(1)
+	}
+	vmark.stop()
+	println( 'Installing a v module took: ' + vmark.total_duration().str() + 'ms')
+	
+	if building_tools_failed || compiler_test_session.failed || building_examples_failed {
+		exit(1)
+	}
+	
+}
diff --git a/tools/vtest.v b/tools/vtest.v
index 19d84d5ecc..cbd9d613b5 100644
--- a/tools/vtest.v
+++ b/tools/vtest.v
@@ -2,44 +2,17 @@ module main
 
 import (
 	os
-	term
-	benchmark
+  testing
 )
 
-struct TestSession {
-mut:
-	files []string
-	vexe string
-	vargs string
-	failed bool
-	benchmark benchmark.Benchmark
-}
-
-pub fn new_test_sesion(vargs string) TestSession {
-	return TestSession{
-		vexe: vexe_path()
-		vargs: vargs
-	}
-}
-
-fn vexe_path() string {
-	// NB: tools extracted from v require that the first
-	// argument to them to be the v executable location.
-	// They are usually launched by vlib/compiler/vtools.v,
-	// launch_tool/1 , which provides it.
-	return os.args[1]
-}
-
 pub fn main() {
 	args := os.args
 	if args.last() == 'test' {
 		println('Usage:')
 		println('   A)')
-		println('      v test v  : run all v tests and build all the examples')
-		println('   B)')
 		println('      v test folder/ : run all v tests in the given folder.')
 		println('      v -stats test folder/ : the same, but print more stats.')
-		println('   C)')
+		println('   B)')
 		println('      v test file_test.v : run test functions in a given test file.')
 		println('      v -stats test file_test.v : as above, but with more stats.')
 		println('   NB: you can also give many and mixed folder/ file_test.v arguments after test.')
@@ -52,11 +25,12 @@ pub fn main() {
 	args_after  := args_string.all_after('test ')
 
 	if args_after == 'v' {
-		v_test_v(args_before)
-		return
+		eprintln('`v test v` has been deprecated.')
+		eprintln('Use `v test-compiler` instead.')
+		exit(1)
 	}
-
-	mut ts := new_test_sesion(args_before)
+  
+	mut ts := testing.new_test_sesion(args_before)
 	for targ in args_after.split(' ') {
 		if os.file_exists(targ) && targ.ends_with('_test.v') {
 			ts.files << targ
@@ -79,119 +53,3 @@ pub fn main() {
 	}
 }
 
-pub fn (ts mut TestSession) test() {
-	ok   := term.ok_message('OK')
-	fail := term.fail_message('FAIL')
-	show_stats := '-stats' in ts.vargs.split(' ')
-	ts.benchmark = benchmark.new_benchmark()
-	for dot_relative_file in ts.files {
-		relative_file := dot_relative_file.replace('./', '')
-		file := os.realpath( relative_file )
-		$if windows {
-			if file.contains('sqlite') { continue }
-		}
-		$if msvc {
-			if file.contains('asm') { continue }
-		}
-		$if tinyc {
-			if file.contains('asm') { continue }
-		}
-		tmpc_filepath := file.replace('.v', '.tmp.c')
-
-		cmd := '"$ts.vexe" $ts.vargs "$file"'
-
-		ts.benchmark.step()
-		if show_stats {
-			println('-------------------------------------------------')
-			status := os.system(cmd)
-			if status == 0 {
-				ts.benchmark.ok()
-			}else{
-				ts.benchmark.fail()
-				ts.failed = true
-				continue
-			}
-		}else{
-			r := os.exec(cmd) or {
-				ts.benchmark.fail()
-				ts.failed = true
-				println(ts.benchmark.step_message('$relative_file $fail'))
-				continue
-			}
-			if r.exit_code != 0 {
-				ts.benchmark.fail()
-				ts.failed = true
-				println(ts.benchmark.step_message('$relative_file $fail\n`$file`\n (\n$r.output\n)'))
-			} else {
-				ts.benchmark.ok()
-				println(ts.benchmark.step_message('$relative_file $ok'))
-			}
-		}
-		os.rm( tmpc_filepath )
-	}
-	ts.benchmark.stop()
-}
-
-pub fn v_test_v(args_before_test string){
-	vexe := vexe_path()
-	parent_dir := os.dir(vexe)
-	// 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 )
-	if !os.dir_exists(parent_dir + '/vlib') {
-		println('vlib/ is missing, it must be next to the V executable')
-		exit(1)
-	}
-	/*
-	if !os.file_exists(parent_dir + '/v.v') {
-		println('v.v is missing, it must be next to the V executable')
-		exit(1)
-	}
-	*/
-	// Make sure v.c can be compiled without warnings
-	$if mac {
-		if os.file_exists('/v.v') {
-			os.system('$vexe -o v.c v.v')
-			if os.system('cc -Werror v.c') != 0 {
-				println('cc failed to build v.c without warnings')
-				exit(1)
-			}
-			println('v.c can be compiled without warnings. This is good :)')
-		}
-	}
-	//
-	println('Testing...')
-	mut ts := new_test_sesion( args_before_test )
-	ts.files << os.walk_ext(parent_dir, '_test.v')
-	ts.test()
-	println( ts.benchmark.total_message('running V tests') )
-	//
-	println('\nBuilding examples...')
-	mut es := new_test_sesion( args_before_test )
-	files := os.walk_ext(parent_dir+'/examples','.v')
-	stable := files.filter(!it.contains('automaton.v') && !it.contains('some_module.v'))
-	es.files << stable
-	es.test()
-	println( es.benchmark.total_message('building examples') )
-	//
-	test_vget()
-	if ts.failed || es.failed {
-		exit(1)
-	}
-}
-
-pub fn test_vget() {
-	/*
-	vexe := vexe_path()
-	ret := os.system('$vexe install nedpals.args')
-	if ret != 0 {
-		println('failed to run v install')
-		exit(1)
-	}
-	if !os.file_exists(v_modules_path + '/nedpals/args') {
-		println('v failed to install a test module')
-		exit(1)
-	}
-	println('vget is OK')
-	*/
-}
diff --git a/v.v b/v.v
index b34832ab11..33b7a1fbe6 100755
--- a/v.v
+++ b/v.v
@@ -25,6 +25,14 @@ fn main() {
 	stuff_after_executable := os.args[1..]
 	commands := stuff_after_executable.filter(!it.starts_with('-'))
 	
+	simple_tools := ['up', 'create', 'test', 'test-compiler', 'build-tools', 'build-examples']
+	for tool in simple_tools {
+		if tool in commands {
+			compiler.launch_tool('v$tool')
+			return
+		}
+	}
+  
 	// Print the version and exit.
 	if '-v' in options || '--version' in options || 'version' in commands {
 		version_hash := compiler.vhash()
@@ -39,10 +47,6 @@ fn main() {
 		println('Translating C to V will be available in V 0.3')
 		return
 	}
-	else if 'up' in commands {
-		compiler.launch_tool('vup')
-		return
-	}
 	else if 'search' in commands || 'install' in commands || 'update' in commands || 'remove' in commands {
 		compiler.launch_tool('vpm')
 		return
@@ -55,10 +59,6 @@ fn main() {
 		compiler.create_symlink()
 		return
 	}
-	else if 'create' in commands {
-		compiler.launch_tool('vcreate')
-		return
-	}
 	// TODO quit if the v compiler is too old
 	// u := os.file_last_mod_unix('v')
 	// If there's no tmp path with current version yet, the user must be using a pre-built package
@@ -68,10 +68,6 @@ fn main() {
 		compiler.vfmt(args)
 		return
 	}
-	else if 'test' in commands {
-		compiler.launch_tool('vtest')
-		return
-	}
 	// No args? REPL
 	else if 'runrepl' in commands || commands.len == 0 || (args.len == 2 && args[1] == '-') {
 		compiler.launch_tool('vrepl')
diff --git a/vlib/compiler/cgen.v b/vlib/compiler/cgen.v
index 288ff2d09d..0fb0c3a4ab 100644
--- a/vlib/compiler/cgen.v
+++ b/vlib/compiler/cgen.v
@@ -42,7 +42,7 @@ mut:
 
 fn new_cgen(out_name_c string) &CGen {
 	path := out_name_c
-	out := os.create(path) or {
+	mut out := os.create(path) or {
 		println('failed to create $path')
 		return &CGen{}
 	}
diff --git a/vlib/compiler/module_header.v b/vlib/compiler/module_header.v
index 454c2ab780..2d02a0ebd1 100644
--- a/vlib/compiler/module_header.v
+++ b/vlib/compiler/module_header.v
@@ -38,7 +38,7 @@ fn generate_vh(mod string) {
 		os.mkdir_all(pdir)
 		// os.mkdir(os.realpath(dir)) or { panic(err) }
 	}
-	out := os.create(path) or { panic(err) }
+	mut out := os.create(path) or { panic(err) }
 	mod_path := mod.replace("\\", "/")
 	out.writeln('// $mod_path module header\n')
 	mod_def := if mod_path.contains('/') { mod_path.all_after('/') } else { mod_path } // "os"
diff --git a/vlib/compiler/vfmt.v b/vlib/compiler/vfmt.v
index 582d15dc00..9d498918a1 100644
--- a/vlib/compiler/vfmt.v
+++ b/vlib/compiler/vfmt.v
@@ -200,7 +200,7 @@ fn (p mut Parser) gen_fmt() {
 		return
 	}	
 	println('generating ${p.file_name}.v')
-	out := os.create('/var/tmp/fmt/' + p.file_name) or {
+	mut out := os.create('/var/tmp/fmt/' + p.file_name) or {
 		verror('failed to create fmt.v')
 		return
 	}
diff --git a/vlib/compiler/x64/elf.v b/vlib/compiler/x64/elf.v
index bef5cac00d..3a97ab46fe 100644
--- a/vlib/compiler/x64/elf.v
+++ b/vlib/compiler/x64/elf.v
@@ -96,7 +96,7 @@ pub fn (g mut Gen) generate_elf_footer() {
 	// -5 is for "e8 00 00 00 00"
 	g.write64_at(int(g.main_fn_addr - g.code_start_pos) - 5, g.code_start_pos+1)
 	// Create the binary
-	f := os.create(g.out_name) or { panic(err) }
+	mut f := os.create(g.out_name) or { panic(err) }
 	os.chmod(g.out_name, 0775)
 	f.write_bytes(g.buf.data, g.buf.len)
 	f.close()
diff --git a/vlib/flag/flag.v b/vlib/flag/flag.v
index c132ab6b4a..4e20128d26 100644
--- a/vlib/flag/flag.v
+++ b/vlib/flag/flag.v
@@ -45,7 +45,7 @@ module flag
 //  ```
 
 // data object storing information about a defined flag
-struct Flag {
+pub struct Flag {
 pub:
   name     string // name as it appears on command line
   abbr     byte   // shortcut
@@ -55,7 +55,7 @@ pub:
 }
 
 // 
-struct FlagParser {
+pub struct FlagParser {
 pub mut: 
   args  []string                  // the arguments to be parsed
   flags []Flag                    // registered flags
@@ -69,7 +69,7 @@ pub mut:
   args_description        string
 }
 
-const (
+pub const (
   // used for formating usage message
   SPACE = '                            '
   UNDERLINE = '-----------------------------------------------'
@@ -125,14 +125,13 @@ fn (fs mut FlagParser) parse_value(n string, ab byte) ?string {
   c := '--$n'
   for i, a in fs.args {
     if a == c || (a.len == 2 && a[1] == ab) {
-      if fs.args.len > i+1 && fs.args[i+1].left(2) != '--' {
-        val := fs.args[i+1]
-        fs.args.delete(i+1)
-        fs.args.delete(i)
-        return val
-      } else {
-        panic('Missing argument for \'$n\'')
-      }
+      if i+1 > fs.args.len { panic('Missing argument for \'$n\'') }
+      nextarg := fs.args[i+1]
+      if nextarg.limit(2) == '--' { panic('Missing argument for \'$n\'') }
+      val := fs.args[i+1]
+      fs.args.delete(i+1)
+      fs.args.delete(i)
+      return val
     } else if a.len > c.len && c == a[..c.len] && a[c.len..c.len+1] == '=' {
       val := a[c.len+1..]
       fs.args.delete(i)
diff --git a/vlib/flag/flag_test.v b/vlib/flag/flag_test.v
index afea40be20..39364db85a 100644
--- a/vlib/flag/flag_test.v
+++ b/vlib/flag/flag_test.v
@@ -247,3 +247,20 @@ fn test_allow_abreviations() {
   u := fp.usage()
   assert u.contains(' -v') && u.contains(' -o') && u.contains(' -i') && u.contains(' -f')
 }
+
+fn test_allow_kebab_options() {
+  default_value := 'this_is_the_default_value_of_long_option'
+  long_option_value := 'this_is_a_long_option_value_as_argument'
+  
+  mut fp := flag.new_flag_parser(['--my-long-flag', 'true', '--my-long-option', long_option_value ])
+
+  my_flag   := fp.bool('my-long-flag',     false,         'flag with long-kebab-name')
+  my_option := fp.string('my-long-option', default_value, 'string with long-kebab-name')
+ 
+  assert my_flag == true
+  assert my_option == long_option_value
+
+  u := fp.usage()
+  assert u.contains(' --my-long-flag')
+  assert u.contains(' --my-long-option')
+}
diff --git a/vlib/log/log.v b/vlib/log/log.v
index 5ab445398d..ac36be27dd 100644
--- a/vlib/log/log.v
+++ b/vlib/log/log.v
@@ -3,11 +3,12 @@ module log
 import os
 import time
 import term
+import filepath
 
 pub enum LogLevel {
-	fatal
+	fatal = 1
 	error
-	warning
+	warn
 	info
 	debug
 }
@@ -16,8 +17,8 @@ fn tag(l LogLevel) string {
 	return match l {
 		.fatal { term.red('F') }
 		.error { term.red('E') }
-		.warning { term.yellow('W') }
-		.info { term.white('I') }
+		.warn  { term.yellow('W') }
+		.info  { term.white('I') }
 		.debug { term.blue('D') }
 		else { ' ' }
 	}
@@ -40,17 +41,21 @@ interface Logger {
 }
 
 pub struct Log {
-	mut:
+mut:
 	level LogLevel
 	output_label string
+  
+	ofile os.File
 	output_to_file bool
+pub:
+	output_file_name string
 }
 
 pub fn (l mut Log) set_level(level int){
 	l.level = match level {
 		FATAL { LogLevel.fatal }
 		ERROR { LogLevel.error }
-		WARN { LogLevel.warning }
+		WARN { LogLevel.warn }
 		INFO { LogLevel.info }
 		DEBUG { LogLevel.debug }
 		else { .debug }
@@ -61,79 +66,74 @@ pub fn (l mut Log) set_output_level(level LogLevel){
 	l.level = level
 }
 
-pub fn (l mut Log) set_output_label(label string) {
+pub fn (l mut Log) set_full_logpath(full_log_path string) {
+	rlog_file := os.realpath( full_log_path )
+	l.set_output_label( os.filename( rlog_file ) )
+	l.set_output_path( os.basedir( rlog_file ) )
+}  
+
+pub fn (l mut Log) set_output_label(label string){
 	l.output_label = label
 }
 
-pub fn (l mut Log) set_output(output string){
-	l.output_label = output
+pub fn (l mut Log) set_output_path(output_file_path string) {
+	if l.ofile.is_opened() { l.ofile.close() }
+	l.output_to_file = true
+	l.output_file_name = filepath.join( os.realpath( output_file_path ) , l.output_label )
+	mut ofile := os.open_append( l.output_file_name  ) or {
+		panic('error while opening log file ${l.output_file_name} for appending')
+	}
+	l.ofile = ofile  
 }
 
-fn (l Log) log_file(s string, level LogLevel) {
-	filename := '${l.output_label}.log'.replace(' ', '')
-	f := os.open_append(filename) or {
-		panic('error reading file $filename')
-	}
+pub fn (l mut Log) close(){
+  l.ofile.close()
+}
+
+fn (l mut Log) log_file(s string, level LogLevel) {
 	timestamp := time.now().format_ss()
 	e := tag(level)
-	f.writeln('$timestamp [$e] $s')
+	l.ofile.writeln('$timestamp [$e] $s')
 }
 
-fn (l Log) log_cli(s string, level LogLevel) {
+fn (l mut Log) log_cli(s string, level LogLevel) {
 	f := tag(level)
 	t := time.now()
 	println('[$f ${t.format_ss()}] $s')
 }
 
-pub fn (l Log) fatal(s string){
-	if l.level == .fatal {
-		if l.output_to_file {
-			l.log_file(s, .fatal)
-		} else {
-			l.log_cli(s, .fatal)
-		}
-		panic('$l.output_label: $s')
-	}
-}
-
-pub fn (l Log) error(s string){
-	if l.level in [.info, .debug, .warning, .error] {
-		if l.output_to_file {
-			l.log_file(s, .error)
-		} else {
-			l.log_cli(s, .error)
-		}
-
-	}
-}
-
-pub fn (l Log) warn(s string){
-	if l.level in [.info, .debug, .warning] {
-		if l.output_to_file {
-			l.log_file(s, .warning)
-		} else {
-			l.log_cli(s, .warning)
-		}
-	}
-}
-
-pub fn (l Log) info(s string){
-	if l.level in [.info, .debug] {
-		if l.output_to_file {
-			l.log_file(s, .info)
-		} else {
-			l.log_cli(s, .info)
-		}
-	}
-}
-
-pub fn (l Log) debug(s string){
-	if l.level != .debug {
-		return
-	}
+fn (l mut Log) send_output(s &string, level LogLevel){
 	if l.output_to_file {
-		l.log_file(s, .debug)
+		l.log_file(s, level)
 	} else {
-		l.log_cli(s, .debug)
+		l.log_cli(s, level)
 	}
 }
+
+pub fn (l mut Log) fatal(s string){
+	if l.level < .fatal { return }
+	l.send_output(s, .fatal)
+	l.ofile.close()
+	panic('$l.output_label: $s')
+}
+
+pub fn (l mut Log) error(s string){
+	if l.level < .error { return }
+	l.send_output(s, .error)
+}
+
+pub fn (l mut Log) warn(s string){
+	if l.level < .warn { return }
+	l.send_output(s, .warn)
+}
+
+pub fn (l mut Log) info(s string){
+	if l.level < .info { return }
+	l.send_output(s, .info)
+}
+
+pub fn (l mut Log) debug(s string){
+	if l.level < .debug { return	}
+	l.send_output(s, .debug)
+}
+
diff --git a/vlib/os/os.v b/vlib/os/os.v
index e0f2c5e267..5206967719 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -33,6 +33,8 @@ pub const (
 
 pub struct File {
 	cfile voidptr // Using void* instead of FILE*
+mut: 
+	opened bool
 }
 
 struct FileInfo {
@@ -68,14 +70,17 @@ fn C.getenv(byteptr) &char
 fn C.sigaction(int, voidptr, int)
 
 
+pub fn (f File) is_opened() bool {
+	return f.opened
+}
 
 // read_bytes reads an amount of bytes from the beginning of the file
-pub fn (f File) read_bytes(size int) []byte {
+pub fn (f mut File) read_bytes(size int) []byte {
 	return f.read_bytes_at(size, 0)
 }
 
 // read_bytes_at reads an amount of bytes at the given position in the file
-pub fn (f File) read_bytes_at(size, pos int) []byte {
+pub fn (f mut File) read_bytes_at(size, pos int) []byte {
 	mut arr	 := [`0`].repeat(size)
 	C.fseek(f.cfile, pos, C.SEEK_SET)
 	nreadbytes := C.fread(arr.data, 1, size, f.cfile)
@@ -281,6 +286,7 @@ pub fn open(path string) ?File {
 	if isnil(file.cfile) {
 		return error('failed to open file "$path"')
 	}
+	file.opened = true
 	return file
 }
 
@@ -302,6 +308,7 @@ pub fn create(path string) ?File {
 	if isnil(file.cfile) {
 		return error('failed to create file "$path"')
 	}
+	file.opened = true
 	return file
 }
 
@@ -322,10 +329,11 @@ pub fn open_append(path string) ?File {
 	if isnil(file.cfile) {
 		return error('failed to create(append) file "$path"')
 	}
+	file.opened = true
 	return file
 }
 
-pub fn (f File) write(s string) {
+pub fn (f mut File) write(s string) {
 	C.fputs(s.str, f.cfile)
 	// C.fwrite(s.str, 1, s.len, f.cfile)
 }
@@ -333,17 +341,18 @@ pub fn (f File) write(s string) {
 // convert any value to []byte (LittleEndian) and write it
 // for example if we have write(7, 4), "07 00 00 00" gets written
 // write(0x1234, 2) => "34 12"
-pub fn (f File) write_bytes(data voidptr, size int) {
+pub fn (f mut File) write_bytes(data voidptr, size int) {
 	C.fwrite(data, 1, size, f.cfile)
 }
 
-pub fn (f File) write_bytes_at(data voidptr, size, pos int) {
+pub fn (f mut File) write_bytes_at(data voidptr, size, pos int) {
 	C.fseek(f.cfile, pos, C.SEEK_SET)
 	C.fwrite(data, 1, size, f.cfile)
 	C.fseek(f.cfile, 0, C.SEEK_END)
 }
 
-pub fn (f File) writeln(s string) {
+pub fn (f mut File) writeln(s string) {
+	if !f.opened { return }
 	// C.fwrite(s.str, 1, s.len, f.cfile)
 	// ss := s.clone()
 	// TODO perf
@@ -352,11 +361,15 @@ pub fn (f File) writeln(s string) {
 	C.fputs('\n', f.cfile)
 }
 
-pub fn (f File) flush() {
+pub fn (f mut File) flush() {
+	if !f.opened { return }
 	C.fflush(f.cfile)
 }
 
-pub fn (f File) close() {
+pub fn (f mut File) close() {
+	if !f.opened { return }
+	f.opened = false
+	C.fflush(f.cfile)
 	C.fclose(f.cfile)
 }
 
@@ -707,7 +720,7 @@ pub fn home_dir() string {
 
 // write_file writes `text` data to a file in `path`.
 pub fn write_file(path, text string) {
-	f := os.create(path) or {
+	mut f := os.create(path) or {
 		return
 	}
 	f.write(text)
diff --git a/vlib/os/os_test.v b/vlib/os/os_test.v
index cd6e335d75..911cc5d506 100644
--- a/vlib/os/os_test.v
+++ b/vlib/os/os_test.v
@@ -43,7 +43,7 @@ fn test_write_and_read_bytes() {
         file_name :=  './byte_reader_writer.tst'
         payload   :=  [`I`, `D`, `D`, `Q`, `D`]
 
-        file_write := os.create(os.realpath(file_name)) or {
+        mut file_write := os.create(os.realpath(file_name)) or {
                 eprintln('failed to create file $file_name')
                 return
         }
@@ -56,7 +56,7 @@ fn test_write_and_read_bytes() {
 
         assert payload.len == os.file_size(file_name)
 
-        file_read := os.open(os.realpath(file_name)) or {
+        mut file_read := os.open(os.realpath(file_name)) or {
           eprintln('failed to open file $file_name')
           return
         }
diff --git a/vlib/ui/ui_lin.v b/vlib/ui/ui_linux.v
similarity index 100%
rename from vlib/ui/ui_lin.v
rename to vlib/ui/ui_linux.v
diff --git a/vlib/vweb/assets/assets.v b/vlib/vweb/assets/assets.v
index 07d56e4813..963653f4e9 100644
--- a/vlib/vweb/assets/assets.v
+++ b/vlib/vweb/assets/assets.v
@@ -105,7 +105,7 @@ fn (am mut AssetManager) combine(asset_type string, to_file bool) string {
 	if !os.dir_exists(am.cache_dir) {
 		os.mkdir(am.cache_dir) or { panic(err) }
 	}
-	file := os.create(out_file) or {
+	mut file := os.create(out_file) or {
 		panic(err)
 	}
 	file.write(out)