third_party/WebKit/Source/devtools/scripts/generate_supported_css.py

#!/usr/bin/env python
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try:
    import simplejson as json
except ImportError:
    import json

import sys


def properties_from_file(file_name):
    properties = []
    propertyNames = set()
    with open(file_name, "r") as f:
        for line in f:
            line = line.strip()
            if not line or line.startswith("//") or "alias_for" in line:
                continue
            name = line.partition(" ")[0]
            entry = {"name": name}
            propertyNames.add(name)
            longhands = line.partition("longhands=")[2].partition(",")[0]
            if longhands:
                entry["longhands"] = longhands.split(";")
            properties.append(entry)

    # Filter out unsupported longhands.
    for property in properties:
        if "longhands" not in property:
            continue
        longhands = property["longhands"]
        longhands = [longhand for longhand in longhands if longhand in propertyNames]
        if not longhands:
            del property["longhands"]
        else:
            property["longhands"] = longhands
    return properties

properties = properties_from_file(sys.argv[1])
with open(sys.argv[2], "w") as f:
    f.write("WebInspector.CSSMetadata.initializeWithSupportedProperties(%s);" % json.dumps(properties))