07/08: maint: Use reproducible POT-Creation-Date.

[guix-commits]

janneke pushed a commit to branch wip-tarball
in repository guix.

commit 0f840f3e6d64fc2ba39c071c2af04ae3f9a22aa1
Author: Janneke Nieuwenhuizen <janneke@gnu.org>
AuthorDate: Wed Apr 3 08:08:12 2024 +0200

    maint: Use reproducible POT-Creation-Date.
    
    * po/doc/local.mk (%D%/%.pot): Replace POT-Creation-Date using git 
timestamp.
    (%D%/guix-manual.pot): Likewise.
    
    Change-Id: I1b7f8cc147084c1804deb7be9d36e5eeda2599cb
---
 po/doc/local.mk | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/po/doc/local.mk b/po/doc/local.mk
index dd6ba30133..f68d67ec02 100644
--- a/po/doc/local.mk
+++ b/po/doc/local.mk
@@ -1,6 +1,7 @@
 # GNU Guix --- Functional package management for GNU
 # Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
 # Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+# Copyright © 2024 Janneke Nieuwenhuizen <janneke@gnu.org>
 #
 # This file is part of GNU Guix.
 #
@@ -44,12 +45,19 @@ POT_OPTIONS = \
        --msgid-bugs-address "bug-guix@gnu.org"
 
 %D%/%.pot: $(srcdir)/doc/%.texi
-       $(AM_V_PO4A)$(PO4A_UPDATEPO) -M UTF-8 -f texinfo -m "$<" \
-          -p "$@" $(POT_OPTIONS) && \
-       touch $@
+       $(AM_V_PO4A)$(PO4A_UPDATEPO) -M UTF-8 -f texinfo -m "$<"        \
+          -p "$@-t" $(POT_OPTIONS)
+       date=$$(git log --pretty=format:%ci -n 1 -- $< 2>/dev/null      \
+               || echo $(SOURCE_DATE_EPOCH))                           \
+       sed -ri -e "s,^(.POT-Creation-Date: )[^\]*,\1$$date," $@-t
+       mv $@-t $@
 
 %D%/guix-manual.pot: %D%/guix.pot %D%/contributing.pot
-       msgcat $^ > $@
+       msgcat $^ > $@-t
+       date=$$(git log --pretty=format:%ci -n 1 -- $< 2>/dev/null      \
+               || echo $(SOURCE_DATE_EPOCH))                           \
+       sed -ri "s,^(.POT-Creation-Date: )[^\]*,\1$$date," $@-t
+       mv $@-t $@
 
 doc-pot-update: %D%/guix-manual.pot %D%/guix-cookbook.pot
 .PHONY: doc-pot-update