Our company deploys code into production primarily from our version control system.\u00a0 I suppose all companies do, in some way or another.\u00a0 We endured a long hell with CVS and a far shorter stint in the purgatory of Subversion before we went into the heavenly light of Git.<\/p>\n
The way we do it is to tag various branches destined for certain groups of machines, archive a snapshot, then copy those out to where they belong.\u00a0 This is all partially automated by an awesome (if somewhat Byzantine) home-grown software suite that I inherited once the original author left for (at least literally) greener pastures in the Pacific northwest.<\/p>\n
I’m not normally in charge of deployment, but since I “own” the software now and the usual dude is on a well-deserved vacation, this week I’m handling the once-weekly scheduled deploy and the multitude of little tweaks that absolutely positively must go out immediately.<\/p>\n
Our regular deployment manager sends out hand-written emails when he starts a test deploy, initiates the production deploy, then a final one when everything is finished.\u00a0 Myself,\u00a0 being a hacker, just can’t stomach the thought of not having something like that automated.\u00a0 Thus, I dug into the command that prints the deployment status of all servers and hacked it up to be slightly more informative and email-friendly, so I could just copy-and-paste its output to an email.<\/p>\n
Then I thought, as all hackers think, “Wouldn’t it be cool if I could include a link to Gitweb that shows the exact changes that occurred since the previous deploy?”\u00a0 I know the previous version commit-ish deployed to each\u00a0 server, and of course I know the new one, so I could do it quite easily with a simple git command.<\/p>\n
However, I didn’t want to just slap that command in there so someone could (and likely never would) issue it within their cloned repo.\u00a0 I wanted a simple clickable link to Gitweb.\u00a0 Anyway, the query ends up being something like this, tacked onto your own Gitweb URL, of course:<\/p>\n
gitweb.pl?p=your-repo.git;a=commitdiff;hp=695de2d;h=fb7b608<\/tt><\/p>\n
Where hp<\/tt> is the previous commit-ish and h<\/tt> is the usual “current” commit-ish argument.<\/p>\n
Voil\u00e0!<\/p>\n
The next step was to group all the servers by common changes so there’s only one diff link per group, and next I might try adding an --email-to<\/tt> option to send the email, skipping the copy-and-paste.<\/p>\n
…and then I’ll work on the bugs.<\/p>\n","protected":false},"excerpt":{"rendered":"
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