Earlier today I was checking out a Mercurial repository I setup a while back as a blank template for projects. Unfortunately, my last commit to it was a merge that broke the subrepo state. It also suffered from a typo in the .hgsub file. In short, the repository was hosed because I couldn't update to any of the previous revisions. I kept getting errors like:
cloning subrepo vendor/_src/twig.js from git://github.com:justjohn/twig.js.git fatal: unable to connect to github.com: github.com: Servname not supported for ai_socktype abort: git clone error 128 in vendor/_src/twig.js (in subrepo vendor/_src/twig.js)
abort: invalid subrepository revision specifier in .hgsubstate line 5
It took me a lot of searching to find a solution to these problems, so I'm documenting it here in the hope that someone else finds it useful.
Here are the steps I took to get the repository back into a usable state:
Clone the repository, but don't update to the latest revision (-U flag)
hg clone -U ssh://[email protected]bucket.org/justjohn/template
Revert to a (mostly) good revision excluding the subrepo directories (all were in vendor/_src, you might need multiple "-X" arguments). I was still seeing some errors after running this related to subrepos, but it recovered all the non-subrepo files in the repository.
hg revert -a -r 17 -X vendor/_src
Now, force set the parent revision for your working directory to the latest in the repository:
hg debugrebuildstate -r 19
Now, remove references to hgsub and hgsubstate and commit:
hg rm .hgsub hg rm .hgsubstate hg commit -m "Remove broken subrepo files"
You'll still be unable to update to the broken revisions prior to this, but you can at least clone the repository successfully now.