Merge branch 'jc/po-pritime-fix'

We started using "%" PRItime, imitating "%" PRIuMAX and friends, as
a way to format the internal timestamp value, but this does not
play well with gettext(1) i18n framework, and causes "make pot"
that is run by the l10n coordinator to create a broken po/git.pot
file.  This is a possible workaround for that problem.

* jc/po-pritime-fix:
  Makefile: help gettext tools to cope with our custom PRItime format

Author: gitster

Makefile

@@ -2221,12 +2221,33 @@ LOCALIZED_SH += t/t0200/test.sh
 LOCALIZED_PERL += t/t0200/test.perl
 endif
 
+## Note that this is meant to be run only by the localization coordinator
+## under a very controlled condition, i.e. (1) it is to be run in a
+## Git repository (not a tarball extract), (2) any local modifications
+## will be lost.
+## Gettext tools cannot work with our own custom PRItime type, so
+## we replace PRItime with PRIuMAX.  We need to update this to
+## PRIdMAX if we switch to a signed type later.
+
 po/git.pot: $(GENERATED_H) FORCE
+	# All modifications will be reverted at the end, so we do not
+	# want to have any local change.
+	git diff --quiet HEAD && git diff --quiet --cached
+
+	@for s in $(LOCALIZED_C) $(LOCALIZED_SH) $(LOCALIZED_PERL); \
+	do \
+		sed -e 's|PRItime|PRIuMAX|g' <"$$s" >"$$s+" && \
+		cat "$$s+" >"$$s" && rm "$$s+"; \
+	done
+
 	$(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ $(XGETTEXT_FLAGS_C) $(LOCALIZED_C)
 	$(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ --join-existing $(XGETTEXT_FLAGS_SH) \
 		$(LOCALIZED_SH)
 	$(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ --join-existing $(XGETTEXT_FLAGS_PERL) \
 		$(LOCALIZED_PERL)
+
+	# Reverting the munged source, leaving only the updated $@
+	git reset --hard
 	mv $@+ $@
 
 .PHONY: pot