[inspector] add presubmit.py to compile inspector-related scripts

src/inspector/build/compile-scripts.py

Index: src/inspector/build/compile-scripts.py
diff --git a/src/inspector/build/compile-scripts.py b/src/inspector/build/compile-scripts.py
new file mode 100755
index 0000000000000000000000000000000000000000..c1c3f802f5b95918e78da8d5c65505b38cb559ab
--- /dev/null
+++ b/src/inspector/build/compile-scripts.py
@@ -0,0 +1,154 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 the V8 project authors. All rights reserved.

[Michael Achenbach, 2016/09/28 09:54:05]

nit: If this is not copied but a new file, please fix 80 char line limits in
this file. We also usually have indentation of two spaces. The file is also
inconsistent in python style names with _ and camel case names. We usually
prefer _ style for new files.

[kozy, 2016/09/28 23:38:47]

Done.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import os.path as path
+import generate_protocol_externs
+import re
+import subprocess
+import sys
+
+if len(sys.argv) == 2 and sys.argv[1] == '--help':
+    print("Usage: %s" % path.basename(sys.argv[0]))
+    sys.exit(0)
+
+def popen(arguments):

[Michael Achenbach, 2016/09/28 09:54:05]

nit: move method down to other methods and don't mix with toplevel constants.

[kozy, 2016/09/28 23:38:47]

Done.

+    return subprocess.Popen(arguments, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+
+v8_inspector_path = path.dirname(path.dirname(path.abspath(__file__)))
+
+protocol_externs_file = path.join(v8_inspector_path, 'protocol_externs.js')

[Michael Achenbach, 2016/09/28 09:54:05]

Is this robust to the file already existing? E.g. if the script bailed out early
once or got Ctrl-C'ed and the file kept lying around?

[kozy, 2016/09/28 23:38:47]

Yes, it is.

+injected_script_source_name = path.join(v8_inspector_path, 'injected-script-source.js')
+injected_script_externs_file = path.join(v8_inspector_path, 'injected_script_externs.js')
+debugger_script_source_name = path.join(v8_inspector_path, 'debugger-script.js')
+debugger_script_externs_file = path.join(v8_inspector_path, 'debugger_script_externs.js')
+
+generate_protocol_externs.generate_protocol_externs(protocol_externs_file, path.join(v8_inspector_path, 'js_protocol.json'))
+
+# Error reporting and checking.
+errors_found = False
+
+def error_excepthook(exctype, value, traceback):
+    print 'ERROR:'
+    sys.__excepthook__(exctype, value, traceback)
+sys.excepthook = error_excepthook
+
+error_warning_regex = re.compile(r'WARNING|ERROR')
+
+def hasErrors(output):
+    return re.search(error_warning_regex, output) != None
+
+# Find java.
+# Based on http://stackoverflow.com/questions/377017/test-if-executable-exists-in-python.
+def which(program):
+    def is_exe(fpath):
+        return path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for part in os.environ["PATH"].split(os.pathsep):
+            part = part.strip('"')
+            exe_file = path.join(part, program)
+            if is_exe(exe_file):
+                return exe_file
+    return None
+
+def find_java():
+    required_major = 1

[Michael Achenbach, 2016/09/28 09:54:05]

Maybe make these toplevel constants at the top of this script for better
visibility?

[kozy, 2016/09/28 23:38:47]

Done.

+    required_minor = 7
+    exec_command = None
+    has_server_jvm = True
+    java_path = which('java')
+    if not java_path:
+        java_path = which('java.exe')
+
+    if not java_path:
+        print 'NOTE: No Java executable found in $PATH.'
+        sys.exit(1)
+
+    is_ok = False
+    java_version_out, _ = popen([java_path, '-version']).communicate()
+    java_build_regex = re.compile(r'^\w+ version "(\d+)\.(\d+)')
+    # pylint: disable=E1103
+    match = re.search(java_build_regex, java_version_out)
+    if match:
+        major = int(match.group(1))
+        minor = int(match.group(2))
+        is_ok = major >= required_major and minor >= required_minor
+    if is_ok:
+        exec_command = [java_path, '-Xms1024m', '-server', '-XX:+TieredCompilation']
+        check_server_proc = popen(exec_command + ['-version'])
+        check_server_proc.communicate()
+        if check_server_proc.returncode != 0:
+            # Not all Java installs have server JVMs.
+            exec_command = exec_command.remove('-server')
+            has_server_jvm = False
+
+    if not is_ok:
+        print 'NOTE: Java executable version %d.%d or above not found in $PATH.' % (required_major, required_minor)
+        sys.exit(1)
+    print 'Java executable: %s%s' % (java_path, '' if has_server_jvm else ' (no server JVM)')
+    return exec_command
+
+java_exec = find_java()
+
+closure_compiler_jar = path.join(v8_inspector_path, 'build', 'closure-compiler', 'closure-compiler.jar')

[Michael Achenbach, 2016/09/28 09:54:05]

nit: move constant up to other toplevel constants

[kozy, 2016/09/28 23:38:47]

Done.

+
+common_closure_args = [
+    '--checks_only',
+    '--warning_level', 'VERBOSE'
+]
+
+print 'Compiling injected-script-source.js...'
+
+spawned_compiler_command = java_exec + [
+    '-jar',
+    closure_compiler_jar
+] + common_closure_args
+
+command = spawned_compiler_command + [
+    '--externs', injected_script_externs_file,
+    '--externs', protocol_externs_file,
+    '--js', injected_script_source_name
+]
+
+injectedScriptCompileProc = popen(command)
+
+print 'Compiling debugger-script.js...'
+
+command = spawned_compiler_command + [
+    '--externs', debugger_script_externs_file,
+    '--js', debugger_script_source_name,
+    '--new_type_inf'
+]
+
+debuggerScriptCompileProc = popen(command)
+
+print 'Validating injected-script-source.js...'
+injectedscript_check_script_path = path.join(v8_inspector_path, 'build', "check_injected_script_source.py")
+validateInjectedScriptProc = popen([sys.executable, injectedscript_check_script_path, injected_script_source_name])
+
+print
+
+(injectedScriptCompileOut, _) = injectedScriptCompileProc.communicate()
+print 'injected-script-source.js compilation output:%s' % os.linesep, injectedScriptCompileOut

[Michael Achenbach, 2016/09/28 09:54:05]

Does this work? One %s but two parameters? Thought this might need %s%s and
parentheses around the two parameters. Also below.

[kozy, 2016/09/28 23:38:47]

It print first formatted string and then second string without any formatting.
Split into to print.

+errors_found |= hasErrors(injectedScriptCompileOut)
+
+(debuggerScriptCompilerOut, _) = debuggerScriptCompileProc.communicate()
+print 'debugger-script.js compilation output:%s' % os.linesep, debuggerScriptCompilerOut
+errors_found |= hasErrors(debuggerScriptCompilerOut)
+
+(validateInjectedScriptOut, _) = validateInjectedScriptProc.communicate()
+print 'Validate injected-script-source.js output:%s' % os.linesep, (validateInjectedScriptOut if validateInjectedScriptOut else '<empty>')
+errors_found |= hasErrors(validateInjectedScriptOut)
+
+if errors_found:
+    print 'ERRORS DETECTED'
+
+os.remove(protocol_externs_file)