Bug 1904586 - Use L10n git monorepo for local repack & langpack builds. r=bhearsum

As the monorepo is rooted at one level higher than the previous hg repos,
the `git clone` will fail if ~/.mozbuild/l10n-central/ already exists and is not empty.

The clone will also take a while longer than before,
as it's fetching all localization data rather than just the selected locale.

Differential Revision: https://phabricator.services.mozilla.com/D214826

build/docs/locales.rst

@@ -23,7 +23,7 @@ Instructions for single-locale repacks for developers
 -----------------------------------------------------
 
 This assumes that ``$AB_CD`` is the locale you want to repack with; you
-find the available localizations on `l10n-central <https://hg.mozilla.org/l10n-central/>`_.
+find the available localizations from `firefox-l10n <https://github.com/mozilla-l10n/firefox-l10n>`_.
 
 #. You must have a built and packaged object directory, or a pre-built
    ``en-US`` package.
@@ -42,10 +42,10 @@ find the available localizations on `l10n-central <https://hg.mozilla.org/l10n-c
 You should find a re-packaged build at ``OBJDIR/dist/``, and a
 runnable binary in ``OBJDIR/dist/l10n-stage/``.
 The ``installers`` target runs quite a few things for you, including getting
-the repository for the requested locale from
-https://hg.mozilla.org/l10n-central/. It will clone them into
-``~/.mozbuild/l10n-central``. If you have an existing repository there, you
-may want to occasionally update that via ``hg pull -u``. If you prefer
+the localizations from https://github.com/mozilla-l10n/firefox-l10n.
+It will clone them into ``~/.mozbuild/l10n-central``.
+If you have an existing repository there, you
+may want to occasionally update that via ``git pull``. If you prefer
 to have the l10n repositories at a different location on your disk, you
 can point to the directory via
 
@@ -361,8 +361,8 @@ Localizations
 Now that we talked in-depth about how to expose content to localizers,
 where are the localizations?
 
-We host a mercurial repository per locale. All of our
-localizations can be found on https://hg.mozilla.org/l10n-central/.
+We host all locales in a git monorepo. All of our
+localizations can be found on https://github.com/mozilla-l10n/firefox-l10n.
 
 You can search inside our localized files on
 `Transvision <https://transvision.mozfr.org/>`_.

toolkit/locales/l10n.mk

@@ -146,18 +146,6 @@ repackage-zip-%: unpack
 # chrome directory and top-level localization for Fluent.
 PKG_ZIP_DIRS = chrome localization $(or $(DIST_SUBDIRS),$(DIST_SUBDIR))
 
-# Clone a l10n repository, either via hg or git
-# Make this a variable as it's embedded in a sh conditional
-ifeq ($(VCS_CHECKOUT_TYPE),hg)
-L10N_CO = $(HG) --cwd $(L10NBASEDIR) clone https://hg.mozilla.org/l10n-central/$(AB_CD)/
-else
-ifeq ($(VCS_CHECKOUT_TYPE),git)
-L10N_CO = $(GIT) -C $(L10NBASEDIR) clone hg://hg.mozilla.org/l10n-central/$(AB_CD)/
-else
-L10N_CO = $(error You need to use either hg or git)
-endif
-endif
-
 merge-%: IS_LANGUAGE_REPACK=1
 merge-%: AB_CD=$*
 merge-%:
@@ -173,9 +161,8 @@ ifdef MOZ_AUTOMATION
 endif
 ifdef NIGHTLY_BUILD
 	if  ! test -d $(L10NBASEDIR)/$(AB_CD) ; then \
-		echo 'Checking out $(L10NBASEDIR)/$(AB_CD)' ; \
 		$(NSINSTALL) -D $(L10NBASEDIR) ; \
-		$(L10N_CO) ; \
+		$(GIT) clone https://github.com/mozilla-l10n/firefox-l10n.git $(L10NBASEDIR) ; \
 	fi
 endif
 	$(RM) -rf $(REAL_LOCALE_MERGEDIR)