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How to use ensure_empty_dir method in tox

Best Python code snippet using tox_python

build.py

Source:build.py

...28# Preconditions.29def ensure_remove_dir(path):30    if os.path.exists(path):31        shutil.rmtree(path)32def ensure_empty_dir(path):33    ensure_remove_dir(path)34    os.mkdir(path)35def compile_wasm_interpreter():36    print("Recompiling the wasm interpreter...")37    result = call('make', '-C', INTERPRETER_DIR, 'clean', 'default')38    if result != 0:39        print("Couldn't recompile wasm spec interpreter")40        sys.exit(1)41    print("Done!")42def ensure_wasm_executable(path_to_wasm):43    """44    Ensure we have built the wasm spec interpreter.45    """46    result = call(path_to_wasm, '-v', '-e', '')47    if result != 0:48        print('Unable to run the wasm executable')49        sys.exit(1)50# JS harness.51def convert_one_wast_file(inputs):52    wast_file, js_file = inputs53    print('Compiling {} to JS...'.format(wast_file))54    return run(WASM_EXEC, wast_file, '-h', '-o', js_file)55def convert_wast_to_js(out_js_dir):56    """Compile all the wast files to JS and store the results in the JS dir."""57    inputs = []58    for wast_file in glob.glob(os.path.join(WAST_TESTS_DIR, '*.wast')):59        # Don't try to compile tests that are supposed to fail.60        if '.fail.' in wast_file:61            continue62        js_filename = os.path.basename(wast_file) + '.js'63        js_file = os.path.join(out_js_dir, js_filename)64        inputs.append((wast_file, js_file))65    pool = mp.Pool(processes=8)66    for result in pool.imap_unordered(convert_one_wast_file, inputs):67        if result.returncode != 0:68            print('Error when compiling to JS:')69            print(result.args)70            if result.stdout:71                # stderr is piped to stdout via `run`, so we only need to72                # worry about stdout73                print(result.stdout)74    return [js_file for (wast_file, js_file) in inputs]75def copy_harness_files(out_js_dir, include_harness):76    harness_dir = os.path.join(out_js_dir, 'harness')77    ensure_empty_dir(harness_dir)78    print('Copying JS test harness to the JS out dir...')79    for js_file in glob.glob(os.path.join(HARNESS_DIR, '*')):80        if os.path.basename(js_file) in HARNESS_FILES and not include_harness:81            continue82        shutil.copy(js_file, harness_dir)83def build_js(out_js_dir):84    print('Building JS...')85    convert_wast_to_js(out_js_dir)86    copy_harness_files(out_js_dir, False)87    print('Done building JS.')88# HTML harness.89HTML_HEADER = """<!doctype html>90<html>91    <head>92        <meta charset="UTF-8">93        <title>WebAssembly Web Platform Test</title>94    </head>95    <body>96        <script src={WPT_PREFIX}/testharness.js></script>97        <script src={WPT_PREFIX}/testharnessreport.js></script>98        <script src={PREFIX}/{JS_HARNESS}></script>99        <div id=log></div>100"""101HTML_BOTTOM = """102    </body>103</html>104"""105def wrap_single_test(js_file):106    test_func_name = os.path.basename(js_file).replace('.', '_').replace('-', '_')107    content = "(function {}() {{\n".format(test_func_name)108    with open(js_file, 'r') as f:109        content += f.read()110    content += "reinitializeRegistry();\n})();\n"111    with open(js_file, 'w') as f:112        f.write(content)113def build_html_js(out_dir):114    ensure_empty_dir(out_dir)115    copy_harness_files(out_dir, True)116    tests = convert_wast_to_js(out_dir)117    for js_file in tests:118        wrap_single_test(js_file)119    return tests120def build_html_from_js(tests, html_dir, use_sync):121    for js_file in tests:122        js_filename = os.path.basename(js_file)123        html_filename = js_filename + '.html'124        html_file = os.path.join(html_dir, html_filename)125        js_harness = "sync_index.js" if use_sync else "async_index.js"126        with open(html_file, 'w+') as f:127            content = HTML_HEADER.replace('{PREFIX}', './js/harness') \128                                 .replace('{WPT_PREFIX}', './js/harness') \129                                 .replace('{JS_HARNESS}', js_harness)130            content += "        <script src=./js/{SCRIPT}></script>".replace('{SCRIPT}', js_filename)131            content += HTML_BOTTOM132            f.write(content)133def build_html(html_dir, js_dir, use_sync):134    print("Building HTML tests...")135    js_html_dir = os.path.join(html_dir, 'js')136    tests = build_html_js(js_html_dir)137    print('Building WPT tests from JS tests...')138    build_html_from_js(tests, html_dir, use_sync)139    print("Done building HTML tests.")140# Front page harness.141def build_front_page(out_dir, js_dir, use_sync):142    print('Building front page containing all the HTML tests...')143    js_out_dir = os.path.join(out_dir, 'js')144    tests = build_html_js(js_out_dir)145    front_page = os.path.join(out_dir, 'index.html')146    js_harness = "sync_index.js" if use_sync else "async_index.js"147    with open(front_page, 'w+') as f:148        content = HTML_HEADER.replace('{PREFIX}', './js/harness') \149                             .replace('{WPT_PREFIX}', './js/harness')\150                             .replace('{JS_HARNESS}', js_harness)151        for js_file in tests:152            filename = os.path.basename(js_file)153            content += "        <script src=./js/{SCRIPT}></script>\n".replace('{SCRIPT}', filename)154        content += HTML_BOTTOM155        f.write(content)156    print('Done building front page!')157# Main program.158def process_args():159    parser = argparse.ArgumentParser(description="Helper tool to build the\160            multi-stage cross-browser test suite for WebAssembly.")161    parser.add_argument('--js',162                        dest="js_dir",163                        help="Relative path to the output directory for the pure JS tests.",164                        type=str)165    parser.add_argument('--html',166                        dest="html_dir",167                        help="Relative path to the output directory for the Web Platform tests.",168                        type=str)169    parser.add_argument('--front',170                        dest="front_dir",171                        help="Relative path to the output directory for the front page.",172                        type=str)173    parser.add_argument('--dont-recompile',174                        action="store_const",175                        dest="compile",176                        help="Don't recompile the wasm spec interpreter (by default, it is)",177                        const=False,178                        default=True)179    parser.add_argument('--use-sync',180                        action="store_const",181                        dest="use_sync",182                        help="Let the tests use the synchronous JS API (by default, it does not)",183                        const=True,184                        default=False)185    return parser.parse_args(), parser186if __name__ == '__main__':187    args, parser = process_args()188    js_dir = args.js_dir189    html_dir = args.html_dir190    front_dir = args.front_dir191    if front_dir is None and js_dir is None and html_dir is None:192        print('At least one mode must be selected.\n')193        parser.print_help()194        sys.exit(1)195    if args.compile:196        compile_wasm_interpreter()197    ensure_wasm_executable(WASM_EXEC)198    if js_dir is not None:199        ensure_empty_dir(js_dir)200        build_js(js_dir)201    if html_dir is not None:202        ensure_empty_dir(html_dir)203        build_html(html_dir, js_dir, args.use_sync)204    if front_dir is not None:205        ensure_empty_dir(front_dir)206        build_front_page(front_dir, js_dir, args.use_sync)...

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