i18n: Makefile: "pot" target to extract messages marked for translation

Add rules to generate a template (po/git.pot) listing messages marked
for translation in the C portion of git.

To get started translating, just run "make pot".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index 4e9d935828791295602ec675f67210e8df6cb907..1cc6c6087b530c3b584631a3d19447a4d63f4a99 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -321,6 +321,7 @@ INSTALL = install
 RPMBUILD = rpmbuild
 TCL_PATH = tclsh
 TCLTK_PATH = wish
+XGETTEXT = xgettext
 PTHREAD_LIBS = -lpthread
 PTHREAD_CFLAGS =
 GCOV = gcov
@@ -1590,6 +1591,7 @@ ifndef V
        QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
        QUIET_GEN      = @echo '   ' GEN $@;
        QUIET_LNCP     = @echo '   ' LN/CP $@;
+       QUIET_XGETTEXT = @echo '   ' XGETTEXT $@;
        QUIET_GCOV     = @echo '   ' GCOV $@;
        QUIET_SUBDIR0  = +@subdir=
        QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
@@ -2057,6 +2059,20 @@ info:
 pdf:
        $(MAKE) -C Documentation pdf
 
+XGETTEXT_FLAGS = \
+       --force-po \
+       --add-comments \
+       --msgid-bugs-address="Git Mailing List <git@vger.kernel.org>" \
+       --from-code=UTF-8
+XGETTEXT_FLAGS_C = $(XGETTEXT_FLAGS) --keyword=_ --keyword=N_ --language=C
+LOCALIZED_C := $(C_OBJ:o=c)
+
+po/git.pot: $(LOCALIZED_C)
+       $(QUIET_XGETTEXT)$(XGETTEXT) -o$@+ $(XGETTEXT_FLAGS_C) $(LOCALIZED_C) && \
+       mv $@+ $@
+
+pot: po/git.pot
+
 $(ETAGS_TARGET): FORCE
        $(RM) $(ETAGS_TARGET)
        $(FIND) . -name '*.[hcS]' -print | xargs etags -a -o $(ETAGS_TARGET)

diff --git a/po/.gitignore b/po/.gitignore
new file mode 100644 (file)
index 0000000..a242a86
--- /dev/null
+++ b/po/.gitignore
@@ -0,0 +1 @@
+/git.pot