combine-monorepo.ps1

param (
    [string]$frontendRepoUrl,
    [string]$backendRepoUrl,
    [string]$monorepoName = "monorepo"
)

# Step 1: Clone the repos
Write-Output "Cloning frontend repo..."
git clone $frontendRepoUrl frontend

Write-Output "Cloning backend repo..."
git clone $backendRepoUrl backend

# Step 2: Use git-filter-repo to create subdirectories
Write-Output "Processing frontend repo with git-filter-repo..."
cd frontend
& "C:\Program Files\Git\bin\bash.exe" -c "git-filter-repo --to-subdirectory-filter frontend"
cd ..

Write-Output "Processing backend repo with git-filter-repo..."
cd backend
& "C:\Program Files\Git\bin\bash.exe" -c "git-filter-repo --to-subdirectory-filter backend"
cd ..

# Step 3: Create a new empty repo called "monorepo"
Write-Output "Creating a new empty monorepo..."
mkdir $monorepoName
cd $monorepoName
git init

# Step 4: Add the previously processed repos as remotes to this monorepo
Write-Output "Adding remotes to monorepo..."
git remote add frontend ../frontend
git remote add backend ../backend

# Step 5: Fetch all branches from the remotes
Write-Output "Fetching all branches from frontend..."
$fetchFrontendOutput = git fetch frontend 'refs/heads/*:refs/heads/*' 2>&1
Write-Output "Frontend fetch output:"
Write-Output $fetchFrontendOutput

Write-Output "Fetching all branches from backend..."
$fetchBackendOutput = git fetch backend 'refs/heads/*:refs/heads/*' 2>&1
Write-Output "Backend fetch output:"
Write-Output $fetchBackendOutput

# Step 6: Keep a list of the rejected branches
Write-Output "Processing fetch results..."
$rejectedBranches = @()
$regex = [regex]::new('(?<rej>\[rejected\])\W*(?<branch>\S*)(\W*->)')
$fetchFrontendOutput -split "`n" | ForEach-Object {
    if ($regex.IsMatch($_)) {
        $matches = $regex.Match($_)
        $rejectedBranches += $matches.Groups["branch"].Value
    }
}
$fetchBackendOutput -split "`n" | ForEach-Object {
    if ($regex.IsMatch($_)) {
        $matches = $regex.Match($_)
        $rejectedBranches += $matches.Groups["branch"].Value
    }
}

Write-Output "Rejected branches:"
$rejectedBranches | ForEach-Object {
    Write-Output $_
}

# Step 7: Merge all rejected branches
Write-Output "Merging rejected branches..."
foreach ($branch in $rejectedBranches) {
    Write-Output "Merging branch $branch..."
    git checkout $branch
    git merge frontend/$branch --allow-unrelated-histories -m "Merged frontend/$branch into $branch"
    git merge backend/$branch --allow-unrelated-histories -m "Merged backend/$branch into $branch"
}

Write-Output "Monorepo creation complete."