Find all git repos under current location and report on their branches

FindMasterBranch.ps1

# This script will find all subdirectories in the current directory that are Git repos
# and whose official GitHub repo has migrated to main but you still have master or dev branches.

Push-Location

[string[]] $local:repos = @()
if (Test-Path -PathType Container .git) {
    $repos += "$PWD"
} else {
    $repos = Get-ChildItem -Directory -Recurse |
        Where-Object { Test-Path -PathType Container (Join-Path "$_" ".git") } |
        ForEach-Object FullName
}

foreach ($repo in $repos) {
    Set-Location $repo

    $local:officialRemote = ""
    $local:remotes = git remote
    $local:url = ""
    foreach ($remote in $remotes) {
        $url = git remote get-url $remote

        $local:isOfficialRemote =
            $url -like "https://github.com/aspnet/*" -or
            $url -like "https://github.com/dotnet/*" -or
            $url -like "https://github.com/dougbu/*" -or
            $url -like "https://github.com/mono/*" -or
            $url -like "https://github.com/signalr/*" -or
            $url -like "git@github.com:aspnet/*" -or
            $url -like "git@github.com:dotnet/*" -or
            $url -like "git@github.com:dougbu/*" -or
            $url -like "git@github.com:mono/*" -or
            $url -like "git@github.com:signalr/*"
        if ($isOfficialRemote) {
            # Let's fetch the remote to make sure we know about all branches.
            git fetch $remote --prune 2>&1 >$NUL
            $officialRemote = $remote
            break
        }
    }

    if ($officialRemote -eq "") {
        # This repo didn't have any remotes pointing to an official GitHub repo, so let's skip.
        continue
    }

    # Does this remote have a branch called 'main'?
    git rev-parse "$officialRemote/main" 2>&1 >$NUL
    $local:branchExists = $?
    if ($branchExists) {
        foreach ($remote in $remotes) {
            # Fix up our HEAD for this remote.
            git remote set-head $remote --auto >$NUL

            # Does this remote have a branch called 'master'?
            git rev-parse "$remote/master" 2>&1 >$NUL
            $branchExists = $?
            if ($branchExists) {
                Write-Output "Repo '$url' was migrated to 'main' but there is still a branch called '$remote/master' in $repo"
            }

            # Does this remote have a branch called 'dev'?
            git rev-parse "$remote/dev" 2>&1 >$NUL
            $branchExists = $?
            if ($branchExists) {
                Write-Output "Repo $url was migrated to 'main' but there is still a branch called '$remote/dev' in $repo"
            }
        }

        # Does this repo have a local branch called 'master'?
        git rev-parse master 2>&1 >$NUL
        $branchExists = $?
        if ($branchExists) {
            Write-Output "Repo $url was migrated to 'main' but you still have a local branch called 'master' in $repo"
        }

        # Does this repo have a local branch called 'dev'?
        git rev-parse dev 2>&1 >$NUL
        $branchExists = $?
        if ($branchExists) {
            Write-Output "Repo $url was migrated to 'main' but you still have a local branch called 'dev' $repo"
        }
    }
    else {
        Write-Output "Repo $url was not migrated to 'main'."
    }
}

Pop-Location