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

src/inspector/build/check_injected_script_source.py

Index: src/inspector/build/check_injected_script_source.py
diff --git a/src/inspector/build/check_injected_script_source.py b/src/inspector/build/check_injected_script_source.py
new file mode 100644
index 0000000000000000000000000000000000000000..0f2509cd8c5cac14a82704db7444f2609780adbc
--- /dev/null
+++ b/src/inspector/build/check_injected_script_source.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+# Copyright (c) 2014 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Copied from blink:
+# WebKit/Source/devtools/scripts/check_injected_script_source.py
+#
+
+import re
+import sys
+import os
+
+
+def validate_injected_script(fileName):
+    f = open(fileName, "r")
+    lines = f.readlines()
+    f.close()
+
+    proto_functions = "|".join([
+        # Array.prototype.*
+        "concat", "every", "filter", "forEach", "indexOf", "join", "lastIndexOf", "map", "pop",
+        "push", "reduce", "reduceRight", "reverse", "shift", "slice", "some", "sort", "splice", "toLocaleString", "toString", "unshift",
+        # Function.prototype.*
+        "apply", "bind", "call", "isGenerator", "toSource",
+        # Object.prototype.*
+        "toString",
+    ])
+
+    global_functions = "|".join([
+        "eval", "uneval", "isFinite", "isNaN", "parseFloat", "parseInt", "decodeURI", "decodeURIComponent",
+        "encodeURI", "encodeURIComponent", "escape", "unescape", "Map", "Set"
+    ])
+
+    # Black list:
+    # - instanceof, since e.g. "obj instanceof Error" may throw if Error is overridden and is not a function
+    # - Object.prototype.toString()
+    # - Array.prototype.*
+    # - Function.prototype.*
+    # - Math.*
+    # - Global functions
+    black_list_call_regex = re.compile(r"\sinstanceof\s+\w*|\bMath\.\w+\(|(?<!InjectedScriptHost)\.(" + proto_functions + r")\(|[^\.]\b(" + global_functions + r")\(")
+
+    errors_found = False
+    for i, line in enumerate(lines):
+        if line.find("suppressBlacklist") != -1:
+            continue
+        for match in re.finditer(black_list_call_regex, line):
+            errors_found = True
+            print "ERROR: Black listed expression in %s at line %02d column %02d: %s" % (os.path.basename(fileName), i + 1, match.start(), match.group(0))
+
+    if not errors_found:
+        print "OK"
+
+
+def main(argv):
+    if len(argv) < 2:
+        print('ERROR: Usage: %s path/to/injected-script-source.js' % argv[0])
+        return 1
+
+    validate_injected_script(argv[1])
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))