build: 'guix-manual.*.po' no longer depends on 'guix-manual.pot'.

That dependency was causing a failure when building from a fresh
checkout since commit d60225d5caabfb6409e3277c0512cd4c0fa63d72 because
'guix-manual.pot' was no longer around and there's no rule to make it.

This commit replaces the 'guix-manual.%.po' target by a phony target,
'doc-po-update-%', without any dependency.

* po/doc/local.mk ($(srcdir)/po/doc/guix-manual.%.po): Rename to...
(doc-po-update-%): ... this.  Remove dependencies.
Change how 'lang' is computed; compute $output and $input, and replace
occurrences of $@ and $< with those.
(doc-po-update): Adjust accordingly.

1 files changed, 13 insertions, 10 deletions

diff --git a/po/doc/local.mk b/po/doc/local.mk
index b6262b1fd89..cb5266c6234 100644
--- a/po/doc/local.mk
+++ b/po/doc/local.mk
@@ -30,22 +30,24 @@ POT_OPTIONS = --package-name "guix" --package-version "$(VERSION)" \
                   --copyright-holder "Ludovic Courtès" \
                           --msgid-bugs-address "ludo@gnu.org"
 
-$(srcdir)/po/doc/guix-manual.%.po: $(srcdir)/po/doc/guix-manual.pot
-        @lang=`echo $$(basename "$@") | sed -e 's|^guix-manual.||' -e 's|.po$$||'` ;\
-        if test -f "$@"; then \
+doc-po-update-%:
+        @lang=`echo "$@" | sed -e's/^doc-po-update-//'` ; \
+        output="$(srcdir)/po/doc/guix-manual.$$lang.po" ; \
+        input="$(srcdir)/po/doc/guix-manual.pot" ; \
+        if test -f "$$output"; then \
           test "$(srcdir)" = . && cdcmd="" || cdcmd="cd $(srcdir) && "; \
-          echo "$${cdcmd}$(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $@ $<"; \
+          echo "$${cdcmd}$(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $$output $$input"; \
           cd $(srcdir) \
             && { case `$(MSGMERGE_UPDATE) --version | sed 1q | sed -e 's,^[^0-9]*,,'` in \
                 '' | 0.[0-9] | 0.[0-9].* | 0.1[0-7] | 0.1[0-7].*) \
-                  $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) $@ $<;; \
+                  $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) "$$output" "$$input";; \
                 *) \
-                  $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} $@ $<;; \
+                  $(MSGMERGE_UPDATE) $(MSGMERGE_OPTIONS) --lang=$${lang} "$$output" "$$input";; \
               esac; \
             }; \
-          touch "$@"; \
+          touch "$$output"; \
         else \
-             echo "File $@ does not exist. If you are a translator, you can create it through 'msginit'." 1>&2; \
+             echo "File $$output does not exist.  If you are a translator, you can create it with 'msginit'." 1>&2; \
              exit 1; \
         fi
 
@@ -65,8 +67,9 @@ doc-pot-update:
         rm -f $(addprefix $(srcdir)/po/doc/, $(TMP_POT_FILES))
 
 doc-po-update: doc-pot-update
-        for f in $(DOC_PO_FILES); do \
-                $(MAKE) "$$f"; \
+        for f in $(DOC_PO_FILES); do                                            \
+          lang="`echo "$$f" | $(SED) -es'|.*/guix-manual\.\(.*\)\.po$$|\1|g'`"; \
+          $(MAKE) "doc-po-update-$$lang";                                       \
         done
 
 .PHONY: doc-po-update doc-pot-update