Bug 1496190 - Pre: Fail automation builds that check out l10n repos. r=Pike,Callek

Differential Revision: https://phabricator.services.mozilla.com/D15777

--HG--
extra : moz-landing-system : lando

toolkit/locales/l10n.mk

@@ -183,14 +183,22 @@ L10N_CO = $(error You need to use either hg or git)
 endif
 endif
 
-
 merge-%: IS_LANGUAGE_REPACK=1
 merge-%: AB_CD=$*
 merge-%:
 # For nightly builds, we automatically check out missing localizations
-# from l10n-central.
+# from l10n-central.  We never automatically check out in automation:
+# automation builds check out revisions that have been signed-off by
+# l10n drivers prior to use.
+ifdef MOZ_AUTOMATION
+	if  ! test -d $(L10NBASEDIR)/$(AB_CD) ; then \
+		echo 'Error: Automation requires l10n repositories to be checked out: $(L10NBASEDIR)/$(AB_CD)' ; \
+		exit 1 ; \
+	fi
+endif
 ifdef NIGHTLY_BUILD
-	@if  ! test -d $(L10NBASEDIR)/$(AB_CD) ; then \
+	if  ! test -d $(L10NBASEDIR)/$(AB_CD) ; then \
+		echo 'Checking out $(L10NBASEDIR)/$(AB_CD)' ; \
 		$(NSINSTALL) -D $(L10NBASEDIR) ; \
 		$(L10N_CO) ; \
 	fi