From: Roger Gammans <rgammans@gammascience.co.uk>
Date: Sun, 08 Dec 2019 14:07:15 GMT
Subject: Re: How to determine age of HEAD commit
Message-ID: <0a578dce37e8802b2022df80c336f61a264a33e3.camel@gammascience.co.uk>
In-Reply-To: <956e2efe-3426-f61e-7686-5416b51931b9@iee.email>

On Sun, 2019-12-08 at 12:09 +0000, Philip Oakley wrote:
> Is there a command that does return the numeric agedness of a commit 
> (e.g. now - commit_date, in seconds)?

Hi

I don't know a specific command for the age. But `git cat-file commit
HEAD`, will give you the commit's timestamps in seconds from the the
epoch. (Plus some timezone info).

I can construct a bash script, shown below (warning: only had the most 
rudimentary testing), which turns that into an age. For your use case
you might be better getting yesterdays unix-timestamp from date, if GNU
date is available, and directly comparing it to the commit timestamp.

------
#!/bin/bash

now=$(date +"%s")
commit=$(git cat-file commit HEAD | grep committer)
commit=${commit##*>}
commit=${commit%%+*}
echo $(( $now-$commit ))
#--------------

-- 
Roger Gammans <rgammans@gammascience.co.uk>