bootstrap: Break automake dependency on generated files.

* bootstrap: Generate stub files for the manual translations whose
generated files are not included in the VCS.
* doc/contributing.de.texi: Remove file.
* doc/contributing.es.texi: Remove file.
* doc/contributing.fr.texi: Remove file.
* doc/contributing.zh_CN.texi: Remove file.
* doc/guix.de.texi: Remove file.
* doc/guix.es.texi: Remove file.
* doc/guix.fr.texi: Remove file.
* doc/guix.zh_CN.texi: Remove file.
* .gitignore: Add them.

Signed-off-by: Julien Lepiller <julien@lepiller.eu>

.gitignore

@@ -28,6 +28,7 @@
 /configure
 /doc/*.1
 /doc/.dirstamp
+/doc/contributing.*.texi
 /doc/guix.*.aux
 /doc/guix.*.cp
 /doc/guix.*.cps
@@ -43,6 +44,7 @@
 /doc/guix.*.tp
 /doc/guix.*.vr
 /doc/guix.*.vrs
+/doc/guix.*.texi
 /doc/guix.aux
 /doc/guix.cp
 /doc/guix.cps

bootstrap

@@ -2,4 +2,18 @@
 # Create the build system.
 
 set -e -x
+
+# Generate stubs for translations.
+langs=`find po/doc -type f -name '*.po' \
+        | sed -e 's,guix-manual\.,,' \
+        | xargs -n 1 -I{} basename {} .po`
+for lang in ${langs}; do
+    if [ ! -e "doc/guix.${lang}.texi" ]; then
+	echo "@setfilename guix.${lang}.info" > "doc/guix.${lang}.texi"
+	echo "@include version-${lang}.texi" >> "doc/guix.${lang}.texi"
+	# Ensure .po file is newer.
+	touch "po/doc/guix-manual.${lang}.po"
+    fi
+done
+
 exec autoreconf -vfi