How to display current working copy version of an hg repository on a PHP page

Question

I use Mercurial for most of my projects and when I deploy a web site, I simply just do an hg clone on the production server and hg pull -u from there. What I'd like to do is add a small snippet to my site's footer which displays the current revision number (both decimal and hex) as well as perhaps the current branch. Stack Overflow and BitBucket both do a variation of what I'm looking for.

I briefly tried parsing the output of exec('hg summary'), but I ran into a couple permissions problems before wondering if there was any better way to do it. Is there a better way, or is exec my best option?

Ry4an Brase · Accepted Answer · 2012-03-14T19:08:50.583

21

You could use a post-update hook to put the information in a file. In the site's .hg/hgrc you'd put something like this:

[hooks]
post-update = hg id --rev > VERSION ; hg id --id >> VERSION

then you can access that file from inside your php. You'll still need to make sure that the user running the hg pull -u trusts the hgrc file and that the VERSION file has permissions such that the webserver can read it.

edited Mar 14 '12 at 19:08

answered May 15 '11 at 02:13

Ry4an Brase

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A good description of the revision can obtained with something like `hg log -r . --template "v{latesttag}-{latesttagdistance}-{node|short}\n"`. This returns a string like "v1.0.0-2-5e51254a" (i.e. 2 commits after tag `1.0.0` with changeset id `5e51254a`. – Tim Henigan May 15 '11 at 02:26
Good answer - I like it. Doesn't rely on `exec`, easy enough to implement. Thanks! – Jimmy Sawczuk May 15 '11 at 03:50
`hg id -r` expects an argument, I guess you meant `-n`? – Thomas Keller Mar 13 '12 at 23:49
Right you are @tommyd, though Tim Henigan's form is better yet. – Ry4an Brase Mar 14 '12 at 19:09

How to display current working copy version of an hg repository on a PHP page

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