From: Stanislav Brabec <sbrabec@suse.com>
Date: Fri, 1 Jul 2016 18:21:54 +0000 (+0200)
Subject: Add support for msgmerge --previous
X-Git-Tag: v0.20~512
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=21bc9687d9a8fd990196d4e4275951a9623af370;p=thirdparty%2Fgettext.git

Add support for msgmerge --previous

msgmerge --previous is a very useful feature that makes adjusting of
translation much easier when small changes in the source code are done.
msgmerge supports it for 10 years, but it is not used by most projects,
as Makefile.in.in never added support for it.

Use msgmerge --previous as default on all systems with gettext >= 0.16.
---

diff --git a/NEWS b/NEWS
index bbbf1e35f..83f12805e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+* Runtime behaviour:
+  - update-po target in Makefile.in.in now uses msgfmt --previous.
+
 Version 0.19.8 - June 2016
 
 * Support for reproducible builds:
diff --git a/gettext-runtime/po/Makefile.in.in b/gettext-runtime/po/Makefile.in.in
index 38c293d2e..44ec10381 100644
--- a/gettext-runtime/po/Makefile.in.in
+++ b/gettext-runtime/po/Makefile.in.in
@@ -232,13 +232,15 @@ $(POFILES): $(POFILESDEPS)
 	if test -f "$(srcdir)/$${lang}.po"; then \
 	  test -f $(srcdir)/$(DOMAIN).pot || $(MAKE) $(srcdir)/$(DOMAIN).pot; \
 	  test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
-	  echo "$${cdcmd}$(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $${lang}.po $(DOMAIN).pot"; \
+	  echo "$${cdcmd}$(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} --previous $${lang}.po $(DOMAIN).pot"; \
 	  cd $(srcdir) \
 	    && { case `$(MSGMERGE) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
-	           '' | 0.[0-9] | 0.[0-9].* | 0.1[0-7] | 0.1[0-7].*) \
+	           '' | 0.[0-9] | 0.[0-9].* | 0.1[0-5] | 0.1[0-5].*) \
 	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) $${lang}.po $(DOMAIN).pot;; \
+	           0.1[6-7] | 0.1[6-7].*) \
+	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --previous $${lang}.po $(DOMAIN).pot;; \
 	           *) \
-	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $${lang}.po $(DOMAIN).pot;; \
+	             $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} --previous $${lang}.po $(DOMAIN).pot;; \
 	         esac; \
 	       }; \
 	else \
@@ -439,13 +441,15 @@ update-po: Makefile
 	tmpdir=`pwd`; \
 	echo "$$lang:"; \
 	test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
-	echo "$${cdcmd}$(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang $$lang.po $(DOMAIN).pot -o $$lang.new.po"; \
+	echo "$${cdcmd}$(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang --previous $$lang.po $(DOMAIN).pot -o $$lang.new.po"; \
 	cd $(srcdir); \
 	if { case `$(MSGMERGE) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
-	       '' | 0.[0-9] | 0.[0-9].* | 0.1[0-7] | 0.1[0-7].*) \
+	       '' | 0.[0-9] | 0.[0-9].* | 0.1[0-5] | 0.1[0-5].*) \
 	         $(MSGMERGE) $(MSGMERGE_OPTIONS) -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
+	       0.1[6-7] | 0.1[6-7].*) \
+	         $(MSGMERGE) $(MSGMERGE_OPTIONS) --previous -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
 	       *) \
-	         $(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
+	         $(MSGMERGE) $(MSGMERGE_OPTIONS) --lang=$$lang --previous -o $$tmpdir/$$lang.new.po $$lang.po $(DOMAIN).pot;; \
 	     esac; \
 	   }; then \
 	  if cmp $$lang.po $$tmpdir/$$lang.new.po >/dev/null 2>&1; then \