[bug#70169] [PATCH 5/7] maint: Generate 'doc/version-LANG.texi' reproducibly.

["Ludovic Courtès" <ludo@gnu.org>]

Janneke Nieuwenhuizen <janneke@gnu.org> skribis:

> +# Define a rule to build `version[LANG].texi' reproducibly using metadata from
> +# Git rather than using metadata from the filesystem.
> +define version.texi-from-git
> +override $(srcdir)/doc/stamp-$(1): $(srcdir)/$(2) $(top_srcdir)/configure
> +	$$(AM_V_GEN)set -e					\
> +	export LC_ALL=C;					\
> +	export TZ=UTC0;						\
> +	timestamp=$$$$(git log --pretty=format:%ct -n1 -- $$<	\
> +		2>/dev/null					\
> +		|| echo $$(SOURCE_DATE_EPOCH))			\
> +	dmy=$$$$(date --date="@$$$$timestamp" "+%-d %B %Y");	\
> +	my=$$$$(date --date="@$$$$timestamp" "+%B %Y");		\
> +	{ echo "@set UPDATED $$$$dmy";				\
> +	  echo "@set UPDATED-MONTH $$$$my";			\
> +	  echo "@set EDITION $$$(VERSION)";			\
> +	  echo "@set VERSION $$$(VERSION)"; } > $$@-t;
> +	mv $$@-t $$@
> +	cp -p $$@ $$(srcdir)/doc/version$(3).texi
> +endef
> +
> +i:=0
> +$(eval $(call version.texi-from-git,vti,doc/guix.texi,))
> +$(foreach lang, $(MANUAL_LANGUAGES),				\
> +	$(eval i=$(shell echo $$(($(i)+1))))			\
> +	$(eval $(call version.texi-from-git,$(i),po/doc/guix-manual.$(lang).po,-$(lang))))

Maybe we could drop ‘i’ and instead create ‘samp-fr’, ‘stamp-de’, and so
on?  That is, ‘version.texi-from-git’ would take 2 arguments instead of 3.

(That’s really a minor issue though.)

Ludo’.