Bug#845525: zp: please make the build reproducible

[Chris Lamb]

Source: zp
Version: 1.0-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: timestamps
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

Hi,

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

Patch attached.

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


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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diff --git a/debian/pod2man.mk b/debian/pod2man.mk
index 64bc797..e12e601 100644
--- a/debian/pod2man.mk
+++ b/debian/pod2man.mk
@@ -36,7 +36,12 @@ PACKAGE		?= package
 # Optional variables to set
 MANSECT		?= 1
 PODCENTER 	?= User Commands
+
+ifdef SOURCE_DATE_EPOCH
+PODDATE		= $$(date -u -d "@$(SOURCE_DATE_EPOCH)" "+%Y-%m-%d" 2>/dev/null || date -u -r "$(SOURCE_DATE_EPOCH)" "+%Y-%m-%d" 2>/dev/null || date -u "+%Y-%m-%d")
+else
 PODDATE		= $$(date "+%Y-%m-%d")
+endif
 
 # Directories
 MANSRC		=