Bug#1137018: javacc5: please make the build reproducible

[Chris Lamb]

Source: javacc5
Version: 5.0-11
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: nocheck
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0], we noticed that
javacc5 could not be built reproducibly.

I think this is because the testsuite regenerates some documentation
files, and therefore bumps the modification times of these files. This
means that if the tests are skipped, these files will have a different
timestamp and therefore the package is unreproducible.

A patch is attached that always sets these files to a fixed timestamp
(SOURCE_DATE_EPOCH). This is easier than trying to save-and-restore
the timestamp before and after the tests.

 [0] https://reproducible-builds.org/


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
-------------- next part --------------
--- a/debian/rules	2026-05-18 10:03:26.203874656 -0700
--- b/debian/rules	2026-05-18 10:15:50.089389106 -0700
@@ -10,6 +10,7 @@
 	dh_auto_build -- clean
 	dh_auto_build -- jar
 	docbook-to-man debian/manpage.sgml >bin/javacc5.1
+	touch -d@$(SOURCE_DATE_EPOCH) www/doc/JavaCC.html www/doc/JavaCC.txt
 
 	cp bin/javacc  bin/javacc5
 	cp bin/jjdoc   bin/jjdoc5