Get Current version

[mattfarina]

This is a loose "version" and is different from the Version method which returns a revision. For example, in Git if you're on a branch that name would be returned. If on a tag that name would be returned. Otherwise a revision is returned.

This is a little more difficult in other VCS and am still working out the details if it's possible.

Git

1. Run git symbolic-ref HEAD to see if this is a branch and get the name. If not use Version() to get the revision and TagsFromCommit() to get a tag if one is present.
2. Similar to the first but instead read directly from the file .git/HEAD for the first step.

Hg

1. Run hg parent -T "{node}" to get current commit. Then compare that to hg parent -r tip -T "{node}" to see if on the tip of the branch. If so, hg branch to get the name. Otherwise, use TagsFromCommit() to see if on a tag to return. Or, return commit id.

TODO:

• Bzr
• Strategy for Svn

[mattfarina]

Bzr

In our handling of Bzr we are currently skipping shared repos. In that case each branch (aliased to clone) is it's own directory. That means we can:

• Use bzr log --log-format=line -r-1 to get the id of HEAD
• Use bzr version-info to get the info for the current checkout. _Note, version-info with --custom and --template can be used to replace the innards of CommitInfo() more safely.
• Compare the 2 versions. If they are different, the actual commit we're on can be checked for a tag which can be returned. Otherwise return the revision.
• If on the tip of the branch return -1 (the bzr representation for the last commit)?

[mattfarina]

Svn

Given the current tt could be done.

• Get current rev and the HEAD rev. If they are not equal return the current rev.
• If they are equal it's the tip so return HEAD?

[mattfarina]

See #38 for implementation

[mattfarina]

Merged