gitBranchExpression should override local git branch if provided #100
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We were using
gitBranchExpression
to provide the git branch name via environment variables, intending to override the git branch name as can be detected via the git metadata on the filesystem. Since the addition of detecting the git branch name from the local git metadata was added the use of the environment variable seems to have been dropped.This PR restores that behavior. Now if the environment variable resolves to some string that doesn't contain any additional replacement characters (
${ }
) it will be used, even if the local git metadata could provide a branch name. The actual git branch name will only be used if thegitBranchExpression
is not provided, or doesn't fully resolve.