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-rw-r--r--build/compare-mozconfig/compare-mozconfigs.py176
1 files changed, 176 insertions, 0 deletions
diff --git a/build/compare-mozconfig/compare-mozconfigs.py b/build/compare-mozconfig/compare-mozconfigs.py
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+++ b/build/compare-mozconfig/compare-mozconfigs.py
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+#!/usr/bin/python
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# originally from https://hg.mozilla.org/build/tools/file/4ab9c1a4e05b/scripts/release/compare-mozconfigs.py # NOQA: E501
+
+import difflib
+import logging
+import os
+import unittest
+
+import buildconfig
+import mozunit
+
+FAILURE_CODE = 1
+SUCCESS_CODE = 0
+
+PLATFORMS = (
+ "linux32",
+ "linux64",
+ "macosx64",
+ "win32",
+ "win64",
+ "win64-aarch64",
+)
+
+log = logging.getLogger(__name__)
+
+
+class ConfigError(Exception):
+ pass
+
+
+def readConfig(configfile):
+ c = {}
+ execfile(configfile, c)
+ return c["whitelist"]
+
+
+def verify_mozconfigs(
+ mozconfig_pair, nightly_mozconfig_pair, platform, mozconfigWhitelist
+):
+ """Compares mozconfig to nightly_mozconfig and compare to an optional
+ whitelist of known differences. mozconfig_pair and nightly_mozconfig_pair
+ are pairs containing the mozconfig's identifier and the list of lines in
+ the mozconfig."""
+
+ # unpack the pairs to get the names, the names are just for
+ # identifying the mozconfigs when logging the error messages
+ mozconfig_name, mozconfig_lines = mozconfig_pair
+ nightly_mozconfig_name, nightly_mozconfig_lines = nightly_mozconfig_pair
+
+ if not mozconfig_lines or not nightly_mozconfig_lines:
+ log.info("Missing mozconfigs to compare for %s" % platform)
+ return False
+
+ success = True
+
+ diff_instance = difflib.Differ()
+ diff_result = diff_instance.compare(mozconfig_lines, nightly_mozconfig_lines)
+ diff_list = list(diff_result)
+
+ for line in diff_list:
+ clean_line = line[1:].strip()
+ if (line[0] == "-" or line[0] == "+") and len(clean_line) > 1:
+ # skip comment lines
+ if clean_line.startswith("#"):
+ continue
+ # compare to whitelist
+ message = ""
+ if line[0] == "-":
+ # handle lines that move around in diff
+ if "+" + line[1:] in diff_list:
+ continue
+ if platform in mozconfigWhitelist.get("release", {}):
+ if clean_line in mozconfigWhitelist["release"][platform]:
+ continue
+ elif line[0] == "+":
+ if "-" + line[1:] in diff_list:
+ continue
+ if platform in mozconfigWhitelist.get("nightly", {}):
+ if clean_line in mozconfigWhitelist["nightly"][platform]:
+ continue
+ else:
+ log.warning(
+ "%s not in %s %s!"
+ % (
+ clean_line,
+ platform,
+ mozconfigWhitelist["nightly"][platform],
+ )
+ )
+ else:
+ log.error("Skipping line %s!" % line)
+ continue
+ message = "found in %s but not in %s: %s"
+ if line[0] == "-":
+ log.error(
+ message % (mozconfig_name, nightly_mozconfig_name, clean_line)
+ )
+ else:
+ log.error(
+ message % (nightly_mozconfig_name, mozconfig_name, clean_line)
+ )
+ success = False
+ return success
+
+
+def get_mozconfig(path):
+ """Consumes a path and returns a list of lines from the mozconfig file."""
+ with open(path, "rb") as fh:
+ return fh.readlines()
+
+
+def compare(topsrcdir):
+ app = os.path.join(topsrcdir, "browser")
+ whitelist = readConfig(os.path.join(app, "config", "mozconfigs", "whitelist"))
+
+ success = True
+
+ def normalize_lines(lines):
+ return {l.strip() for l in lines}
+
+ for platform in PLATFORMS:
+ log.info("Comparing platform %s" % platform)
+
+ mozconfigs_path = os.path.join(app, "config", "mozconfigs", platform)
+
+ nightly_path = os.path.join(mozconfigs_path, "nightly")
+ beta_path = os.path.join(mozconfigs_path, "beta")
+ release_path = os.path.join(mozconfigs_path, "release")
+
+ nightly_lines = get_mozconfig(nightly_path)
+ beta_lines = get_mozconfig(beta_path)
+ release_lines = get_mozconfig(release_path)
+
+ # Validate that entries in whitelist['nightly'][platform] are actually
+ # present.
+ whitelist_normalized = normalize_lines(whitelist["nightly"].get(platform, []))
+ nightly_normalized = normalize_lines(nightly_lines)
+
+ for line in sorted(whitelist_normalized - nightly_normalized):
+ log.error("extra line in nightly whitelist: %s" % line)
+ success = False
+
+ log.info("Comparing beta and nightly mozconfigs")
+ passed = verify_mozconfigs(
+ (beta_path, beta_lines), (nightly_path, nightly_lines), platform, whitelist
+ )
+
+ if not passed:
+ success = False
+
+ log.info("Comparing release and nightly mozconfigs")
+ passed = verify_mozconfigs(
+ (release_path, release_lines),
+ (nightly_path, nightly_lines),
+ platform,
+ whitelist,
+ )
+ if not passed:
+ success = False
+
+ return success
+
+
+class TestCompareMozconfigs(unittest.TestCase):
+ def test_compare_mozconfigs(self):
+ topsrcdir = buildconfig.substs["top_srcdir"]
+ self.assertTrue(compare(topsrcdir))
+
+
+if __name__ == "__main__":
+ logging.basicConfig(level=logging.INFO)
+ mozunit.main()