Debian Bug report logs - #1021516
ssocr: reproducible-builds: date in ssocr manpage

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Vagrant Cascadian <vagrant@reproducible-builds.org>

To: submit@bugs.debian.org

Subject: ssocr: reproducible-builds: date in ssocr manpage

Date: Sun, 09 Oct 2022 16:19:10 -0700

[Message part 1 (text/plain, inline)]

Source: ssocr
Severity: normal
Tags: patch
User: reproducible-builds@lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs@lists.alioth.debian.org

The date is embedded in /usr/share/man/man1/ssocr.1.gz:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/ssocr.html

  TH·ssocr·1·"2023-11-10"·"2.22.1"·"OCR·for·seven·segment·displays"
  vs.
  TH·ssocr·1·"2022-10-09"·"2.22.1"·"OCR·for·seven·segment·displays"

The attached patch to the upstream Makefile fixes this by using
SOURCE_DATE_EPOCH to determine the date to embed in the manpage.

According to my local tests, with this patch applied, and the patch
applied to fix build paths from #1021514, ssocr should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining ssocr!

live well,
  vagrant

[0001-Makefile-Use-SOURCE_DATE_EPOCH-for-the-date-embedded.patch (text/x-diff, inline)]

From 72522a777380147442bb9108fbcad2422b7acc32 Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Sun, 9 Oct 2022 23:10:05 +0000
Subject: [PATCH 1/2] Makefile: Use SOURCE_DATE_EPOCH for the date embedded in
 manpage.

https://reproducible-builds.org/docs/source-date-epoch/
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 556bbde..1ca185f 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@ charset.o: charset.c charset.h defines.h help.h Makefile
 
 ssocr.1: ssocr.1.in Makefile defines.h
 	sed -e 's/@VERSION@/$(VERSION)/' \
-	    -e "s/@DATE@/$(shell date +%Y-%m-%d)/" \
+	    -e "s/@DATE@/$(shell date --utc --date=@(SOURCE_DATE_EPOCH) +%Y-%m-%d)/" \
 	    -e 's/@CRYEARS@/$(CRYEARS)/' <$< >$@
 
 ssocr-manpage.html: ssocr.1
-- 
2.37.2

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Message #12 received at 1021516@bugs.debian.org (full text, mbox, reply):

From: Erik Auerswald <auerswal@unix-ag.uni-kl.de>

To: 1021516@bugs.debian.org

Subject: Better remove the date completely than fake it

Date: Mon, 8 May 2023 14:44:14 +0200

Hi,

this is the ssocr upstream developer.

I am looking into replacing the build timestamp in the man page by
something more useful, i.e., a date pertaining to the man page contents,
not the build.

But as an interim measurei for the Debian package, if wanted, I would
like to suggest to remove the date from the man page instead of adding
a useless fake date that looks like a mistake.  Please see the attached
patch.

Thanks,
Erik
-- 
Thinking doesn't guarantee that we won't make mistakes. But not thinking
guarantees that we will.
                        -- Leslie Lamport

Message #17 received at 1021516@bugs.debian.org (full text, mbox, reply):

From: Erik Auerswald <auerswal@unix-ag.uni-kl.de>

To: 1021516@bugs.debian.org

Subject: Re: Better remove the date completely than fake it

Date: Mon, 8 May 2023 14:56:07 +0200

[Message part 1 (text/plain, inline)]

Hi,

I forgot to attach the patch, here it is.

Best regards,
Erik
-- 
Thinking doesn't guarantee that we won't make mistakes. But not thinking
guarantees that we will.
                        -- Leslie Lamport

[ssocr-no_man_page_date.patch (text/x-diff, attachment)]

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