Gumby.Git

0.0.1.0

Gumby.Git.psm1

using module Gumby.Path

function GitGetRepoName($defaultRepoName = "<unknown-repo>") {
    $repoName = $defaultRepoName

    try {
        $cmdOut = git remote -v
        # It seems the $Matches variable is not available in the 'prompt' context.
        # The 'Multiline' does not appear to cause '^' and '$' to match the start and end of a line, resp. Perhaps
        # the output of the 'git branch' uses unexpected line breaks.

        $match = [regex]::Match($cmdOut, 'origin\s+https://github.com/([^/]+)/([^/]+)\.git\s+\(fetch\)', ([System.Text.RegularExpressions.RegexOptions]::Multiline))
        if ($match.Success) {
            $owner = $match.Groups[1].Value
            $repo = $match.Groups[2].Value

            $repoName = "$owner-$repo"
        }
    }
    catch {
    }

    return $repoName
}

function GitGetBranchName($defaultBranchName = "<unknown-branch>") {
    $branchName = $defaultBranchName

    try {
        $cmdOut = git branch
        # It seems the $Matches variable is not available in the 'prompt' context.
        # The 'Multiline' does not appear to cause '^' and '$' to match the start and end of a line, resp. Perhaps
        # the output of the 'git branch' uses unexpected line breaks.

        $match = [regex]::Match($cmdOut, '\*\s+([^\s]*)', ([System.Text.RegularExpressions.RegexOptions]::Multiline))
        if ($match.Success) {
            $branchName = $match.Groups[1].Value
        }
    }
    catch {
    }

    return $branchName
}

function GitGetRepoRootDir($folder) {
    [System.IO.DirectoryInfo] $currentDir = Get-Item $folder
    while ($currentDir) {
        if (Test-Path (Join-Path $currentDir.FullName ".git")) { return $currentDir }
        $currentDir = $currentDir.Parent
    }
    return $null
}

function GitCreateCachedRepoNameGetter([string] $rootDir, $defaultRepoName = "<unknown-repo>") {
    $repoName = GitGetRepoName
    return {
        if (!$rootDir -or !(Get-Location).Path.StartsWith($rootDir)) {
            Set-Variable -Name rootDir -Value (GitGetRepoRootDir (Get-Location)) -Scope 1
            if ($rootDir) {
                Set-Variable -Name repoName -Value (GitGetRepoName) -Scope 1
            }
            else {
                Set-Variable -Name repoName -Value $defaultRepoName -Scope 1
            }
        }

        return $repoName
    }.GetNewClosure()
}