Reduce the 'bus factor' for translation sync a bit

This is mostly just what NMo's import-strings.sh does, but now
it's a bit more obvious and accessible for other OpenConnect
developers.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/Makefile.am b/Makefile.am
index e2ff4cd00d970873196a58031ce03c7fb0643f99..e0b4c7231e75f5736ec1f9605a49c21857446ee2 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -245,6 +245,94 @@ tag: uncommitted-check
        @git tag v$(VERSION)
        @cd $(srcdir) && ./autogen.sh
 
+
+###########################################################################
+#
+# Translations are handled in the NetworkManager-openconnect repository by
+# GNOME translation teams. We export all our translatable strings to a file
+# 'openconnect-strings.txt' which is included in their set of files to be
+# translated.
+#
+# We have an 'import-strings' make target which, for each translation, does
+# a merge of their file with ours and compares with a canonicalised version
+# of ours to see if there are any substantive changes. The strings from
+# NetworkManager-openconnect take precedence over ours, so if there are
+# any *corrections* to translations they need to be applied there first,
+# because changes in openconnect to a string which is already translated
+# in NetworkManager-openconnect will get overwritten on the next sync.
+#
+# Given that precedence, the 'export-strings' target is mostly only useful
+# when we add *new* strings which already have translations, which happens
+# occasionally when we change a non-translated part of a string (e.g. when
+# we recently replaced URLs and email addresses with '%s' and could do that
+# without 'losing' the existing translations by changing those too).
+#
+# A decent guess at where NetworkManager-openconnect might be checked out...
+NMO_DIR := $(srcdir)/../NetworkManager-openconnect
+NMO_POT := $(NMO_DIR)/po/NetworkManager-openconnect.pot
+NMO_STRINGS := $(NMO_DIR)/openconnect-strings.txt
+
+NMO_LINGUAS = $(wildcard $(NMO_DIR)/po/*.po)
+OC_LINGUAS = $(shell grep -v ^\# $(srcdir)/po/LINGUAS)
+
+# Generate the openconnect-strings.txt file in the NetworkManager-openconnect
+# repository, which 'injects' our strings there to be translated.
+$(NMO_STRINGS): po/$(PACKAGE).pot uncommitted-check
+       $(srcdir)/export-strings.sh $@ $<
+
+.PHONY: $(NMO_POT)
+$(NMO_POT): $(NMO_STRINGS)
+       make -C $(NMO_DIR)/po NetworkManager-openconnect.pot
+
+# Sync translations from our own po/ directory to NetworkManager-openconnect,
+# with theirs taking precedence. Use a strange path with extra 'po/..' to
+# avoid circular dependencies.
+$(NMO_DIR)/po/../po/%.po: $(srcdir)/po/%.po $(NMO_POT) po/$(PACKAGE).pot
+       @msgattrib -F --no-fuzzy $< > $@.openconnect
+# Merge using local strings as additional compendium
+       @msgmerge -q -N -F $@ -C $@.openconnect ${NMO_POT} > $@.merged
+# Dummy merge (cleanup) for comparison.
+       @msgmerge -q -N -F $@ ${NMO_POT} > $@.unmerged
+# If the result is different, update the NM version.
+       @if ! cmp $@.merged $@.unmerged; then \
+               echo "New changes for NetworkManager-openconnect $(notdir $@)"; \
+               mv $@.merged $@; \
+       else \
+               echo "No changes for NetworkManager-openconnect $(notdir $@)"; \
+       fi
+       @rm -f $@.openconnect $@.merged $@.unmerged
+
+# Sync translations from NetworkManager-openconnect, with theirs taking
+# precedence.
+$(srcdir)/po/../po/%.po: $(NMO_DIR)/po/%.po $(NMO_POT) po/$(PACKAGE).pot
+       @msgattrib -F --no-fuzzy $< > $@.nmo
+# Merge NM against openconnect.pot, using local strings as additional compendium
+       @msgmerge -q -N -C $@ -F $@.nmo po/$(PACKAGE).pot > $@.merged1
+# Remove fuzzy and obsolete translations
+       @msgattrib -F --no-fuzzy --no-obsolete $@.merged1 > $@.merged2
+# Unmerged, clean up for simple comparison
+       @msgmerge -q -N -F $@ po/$(PACKAGE).pot > $@.unmerged
+       @if ! cmp $@.merged2 $@.unmerged; then \
+               echo "New changes for $(notdir $@)"; \
+               mv $@.merged2 $@; \
+       else \
+               echo "No changes for $(notdir $@)"; \
+       fi
+       @rm -f $@.nmo $@.merged1 $@.merged2 $@.unmerged
+
+# Import translated strings from NetworkManager-openconnect
+import-strings: $(patsubst $(NMO_DIR)/%,$(srcdir)/po/../%,$(NMO_LINGUAS))
+       if ! git update-index -q --refresh --unmerged || \
+          ! git diff-index --name-only --exit-code HEAD -- $(srcdir)/po/ >/dev/null; then \
+               git commit -s -m "Import translations from GNOME" -- $(srcdir)/po/ ; \
+       else \
+               echo No changes to commit ; \
+       fi
+
+# Export our translatable strings to NetworkManager-openconnect
+export-strings: $(patsubst $(NMO_DIR)/%,$(NMO_DIR)/po/../%,$(NMO_LINGUAS))
+
+# Just resync the translation comments to reflect accurate line numbers, etc.
 update-po: po/$(PACKAGE).pot
        @cd $(top_srcdir); if ! git diff-index --name-only --exit-code HEAD -- po/; then \
                echo "*** ERROR: Uncommitted changes in above files"; exit 1; \