Bug 1752968 - Make single-locale l10n repacks minify `.properties` files. r=firefox-build-system-reviewers,eemeli,glandium

Differential Revision: https://phabricator.services.mozilla.com/D138365

python/mozbuild/mozpack/packager/l10n.py

@@ -270,7 +270,9 @@ def _repack(app_finder, l10n_finder, copier, formatter, non_chrome=set()):
         copier[path].preload([l.replace(locale, l10n_locale) for l in log])
 
 
-def repack(source, l10n, extra_l10n={}, non_resources=[], non_chrome=set()):
+def repack(
+    source, l10n, extra_l10n={}, non_resources=[], non_chrome=set(), minify=False
+):
     """
     Replace localized data from the `source` directory with localized data
     from `l10n` and `extra_l10n`.
@@ -289,15 +291,16 @@ def repack(source, l10n, extra_l10n={}, non_resources=[], non_chrome=set()):
     is in that format.
     The `non_chrome` argument gives a list of file/directory patterns for
     localized files that are not listed in a chrome.manifest.
+    If `minify`, `.properties` files are minified.
     """
-    app_finder = UnpackFinder(source)
-    l10n_finder = UnpackFinder(l10n)
+    app_finder = UnpackFinder(source, minify=minify)
+    l10n_finder = UnpackFinder(l10n, minify=minify)
     if extra_l10n:
         finders = {
             "": l10n_finder,
         }
         for base, path in six.iteritems(extra_l10n):
-            finders[base] = UnpackFinder(path)
+            finders[base] = UnpackFinder(path, minify=minify)
         l10n_finder = ComposedFinder(finders)
     copier = FileCopier()
     compress = min(app_finder.compressed, JAR_DEFLATED)

python/mozbuild/mozpack/packager/unpack.py

@@ -42,11 +42,12 @@ class UnpackFinder(BaseFinder):
     or with files from a FileFinder using the given path as its root.
     """
 
-    def __init__(self, source, omnijar_name=None, unpack_xpi=True):
+    def __init__(self, source, omnijar_name=None, unpack_xpi=True, **kwargs):
         if isinstance(source, BaseFinder):
+            assert not kwargs
             self._finder = source
         else:
-            self._finder = FileFinder(source)
+            self._finder = FileFinder(source, **kwargs)
         self.base = self._finder.base
         self.files = FileRegistry()
         self.kind = "flat"

toolkit/locales/l10n.mk

@@ -114,6 +114,7 @@ repackage-zip: UNPACKAGE='$(ZIP_IN)'
 repackage-zip:
 	$(PYTHON3) $(MOZILLA_DIR)/toolkit/mozapps/installer/l10n-repack.py '$(STAGEDIST)' $(DIST)/xpi-stage/locale-$(AB_CD) \
 		$(MOZ_PKG_EXTRAL10N) \
+		$(if $(MOZ_PACKAGER_MINIFY),--minify) \
 		$(if $(filter omni,$(MOZ_PACKAGER_FORMAT)),$(if $(NON_OMNIJAR_FILES),--non-resource $(NON_OMNIJAR_FILES)))
 
 ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))

toolkit/mozapps/installer/l10n-repack.py

@@ -56,6 +56,12 @@ def main():
         default=[],
         help="Extra files not to be considered as resources",
     )
+    parser.add_argument(
+        "--minify",
+        action="store_true",
+        default=False,
+        help="Make some files more compact while packaging",
+    )
     args = parser.parse_args()
 
     buildconfig.substs["USE_ELF_HACK"] = False
@@ -66,6 +72,7 @@ def main():
         extra_l10n=dict(args.extra_l10n),
         non_resources=args.non_resource,
         non_chrome=NON_CHROME,
+        minify=args.minify,
     )