Add commit hash to build table

[reece]

It would be very handy for the "Recent Builds" table to indicate the commit hash (or changeset id for hg, etc). Even better would be a link to the commit and the first line of the commit message.

[stsewd]

Adding all the hash would be a little long, for git we can truncate to 7 characters and add a link to the repo.
I don't know how this works with the others vcs.

[reece]

I agree the full hash is long and unnecessary. 7 prefix chars is fine. The point is to be able to link to a specific changeset. Thanks!

(And Mercurial will also accept prefixes of the revision hash)

[agjohnson]

I've added this in some previous pile of commits. The truncated commit will show in the build list now, though we have a few more things to handle:

• What does svn look like? We could also special case git/mercurial repositories and skip this for svn
• Are there cases that the commit is something other than a rev hash? For instance, can the template display a tag or something else that we shouldn't truncate?

[agjohnson]

This has been a feature for a while on our beta dashboard:

https://beta.readthedocs.org/projects/time-test/builds/23581428/

This does respect tags as well, but likely falls down a bit on SVN and friends. I don't feel we need to design around these anymore as we are announcing deprecation for support on these tools with

• Start deprecating old VCS support readthedocs.org#8840