From ee1a8ac29527d7cceb083373926de404b423b131 Mon Sep 17 00:00:00 2001
From: Amos Jeffries <squid3@treenet.co.nz>
Date: Tue, 5 Aug 2008 18:39:39 +1200
Subject: [PATCH] Automatic Translation of .PO and Error Pages

This patch embeds the process of creating pre-translated error templates
from .po

 * installs/uninstalls base templates for failover backup if no
   translation is to be done.
 * Adds dependency on translation toolkit po2html for 'make dist' target.
 * Adds 'make translate' target
 * Adjusts 'make all' to do translation.
 * Adds --without-po2html configure option to optionally skip the
   translation step unless explicitly asked for ('make translate').
 * Installs translated files properly, and skips silently if missing.
 * Un-installs translated files, and skips silently if missing.
---
 configure.in       | 17 +++++++++++++
 errors/Makefile.am | 60 ++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 72 insertions(+), 5 deletions(-)

diff --git a/configure.in b/configure.in
index b8b8f64f59..048f073216 100755
--- a/configure.in
+++ b/configure.in
@@ -3694,6 +3694,23 @@ if test $ac_cv_have_res_ns_list = "yes" ; then
 fi
 fi
 
+dnl Squid now has limited locale handling ...
+DO_TRANSLATE="yes"
+AC_ARG_WITH(po2html,
+[  --without-po2html     Translation toolkit is required to auto-build translated
+                        error pages. If it is not present this option can be used
+                        to run the 'make dist' target without translating.
+                        A drop-in bundle of pre-translated files is available from
+                        http://www.squid-cache.org/Versions/v3/HEAD/
+],
+[ if test "$enableval" != "yes" ; then
+    echo "Disabling Translation Toolkit dependency"
+    DO_TRANSLATE="no"
+  fi
+])
+AC_SUBST(DO_TRANSLATE)
+
+
 dnl Need the debugging version of malloc if available
 XTRA_OBJS=''
 if test "$ac_cv_lib_malloc_main" = "yes" ; then
diff --git a/errors/Makefile.am b/errors/Makefile.am
index 1f4aaf4531..eaba5a95da 100644
--- a/errors/Makefile.am
+++ b/errors/Makefile.am
@@ -10,6 +10,12 @@ errordir = $(datadir)/errors
 
 DEFAULT_ERROR_DIR	= $(errordir)
 
+# List of automated translations possible:
+TRANSLATIONS = \
+	en
+
+# Legacy language contributions...
+#
 INSTALL_LANGUAGES	= @ERR_LANGUAGES@
 LANGUAGES	= \
 		Armenian \
@@ -53,14 +59,30 @@ install-data-local:
 		for f in $(srcdir)/$$l/ERR_*; do \
 			echo "$(INSTALL_DATA) $$f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l"; \
 			$(INSTALL_DATA) $$f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l; \
-		done \
+		done; \
+	done; \
+	for l in $(TRANSLATIONS) templates; do \
+	  if test -d $(srcdir)/$$l; then \
+		$(mkinstalldirs) $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l && \
+		for f in $(srcdir)/$$l/ERR_*; do \
+			echo "$(INSTALL_DATA) $$f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l"; \
+			$(INSTALL_DATA) $$f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l; \
+		done; \
+	  fi \
 	done
 
 uninstall-local:
-	@for l in $(INSTALL_LANGUAGES); do \
+	@ for l in $(INSTALL_LANGUAGES); do \
 		for f in $(srcdir)/$$l/ERR_*; do \
 	        	rm -f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l/`basename $$f`; \
-		done \
+		done; \
+	done; \
+	for l in $(TRANSLATIONS) templates; do \
+	  if test -d $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l; then \
+		for f in $(srcdir)/$$l/ERR_*; do \
+	        	rm -f $(DESTDIR)$(DEFAULT_ERROR_DIR)/$$l/`basename $$f`; \
+		done; \
+	  fi \
 	done
 
 # undocumented hack.  You can use this target to create multi-lingual
@@ -70,6 +92,10 @@ uninstall-local:
 #
 # by Andres Kroonmaa <andre@mail.lbi.ee>
 #
+# UPDATE: this hack completely breaks HTML standards and with the addition
+#	  of language translations is now largely obsolete.
+#	  It will be removed without notice at some future date.
+#
 addlang: all
 	-@if test -d $(srcdir)/$(ADDLANG); then \
 	if test -d $(DEFAULT_ERROR_DIR)/$(DESTLANG); then \
@@ -85,7 +111,7 @@ addlang: all
 	fi
 
 dist-hook:
-	@ for lang in $(LANGUAGES); do \
+	for lang in $(LANGUAGES); do \
 	  if test "$$lang" = .; then :; else \
 	    test -d $(distdir)/$$lang \
 	    || mkdir $(distdir)/$$lang \
@@ -93,4 +119,28 @@ dist-hook:
 	    cp -p $(srcdir)/$$lang/ERR_*  $(distdir)/$$lang \
 	      || exit 1; \
 	  fi; \
-	done		
+	done; \
+	if test "$(DO_TRANSLATE)" = "yes" ; then \
+		translate; \
+	fi
+
+translate:
+	for lang in $(TRANSLATIONS); do \
+		test -d $$lang || rm -r $$lang; \
+		mkdir $$lang; \
+		test -d $(distdir)/$$lang \
+		  || mkdir $(distdir)/$$lang \
+		  || exit 1; \
+		cd $$lang; \
+		for f in `ls -1 ../templates`; do \
+			echo "po2html -i ../$$lang.po -t ../templates/$$f"; \
+			po2html -i ../$$lang.po -t ../templates/$$f \
+			 | sed -r s/\>\ \ ?\</\>\\n\</g >$$f || exit 1; \
+		done; \
+		cd ..; \
+		cp -p $(srcdir)/$$lang/ERR_*  $(distdir)/$$lang \
+		  || exit 1; \
+	done
+
+all:
+	translate
-- 
2.47.3