feature request: $version in source-repository/tag

[dmwit]

I have my version number in two places in many of my cabal files:

version: a.b.c
source-repository this
    tag: a.b.c

It is annoying and somewhat error-prone to have this duplication: one must remember to update both places when making a release. It would be nice if there were a variable or something that could be inserted here to reduce the duplication; e.g. something like

version: a.b.c
source-repository this
    tag: $version

would be much nicer and somewhat consistent with cabal-install's configuration file format.

[UnkindPartition]

I'd love to see this, too. It's very annoying to need to bump the version in two places (and it's easy to forget, too).

I'm not sure whether it was part of Daniel's proposal, but I'd also like to have simple templates for the tag names:

• generally, I tend to name tags as v1.2.3
• in tasty, where I maintain multiple packages under the same repo, I have tags like core-0.2, hunit-0.2, smallcheck-0.1 etc.

[23Skidoo]

The easiest way to implement this is just to make repoTag a PathTemplate.

[hvr]

+:100: :-)

I've been wanting this myself, as the tag names used in practice are in 99% of cases derivable by simple string interpolation with the version number (except for VCS which don't support dots in tag names, is Darcs such a case?)