Improve logging and add test

Generate-GitBranches.Tests.ps1

@@ -0,0 +1,72 @@
+Describe "Generate-GitBranches.ps1" {
+
+    BeforeEach {
+        $games = Get-Content $PSScriptRoot/games.json -Encoding utf8 | ConvertFrom-Json -AsHashtable
+
+        # Copy the git repository
+        $testDrive = "TestDrive:\"
+        $sourceRepo = $PSScriptRoot
+        $destinationRepo = "$testDrive/$( (Get-Item $sourceRepo).Name )"
+        Copy-Item $sourceRepo $destinationRepo -Recurse -Force
+        cd $destinationRepo
+    }
+
+    AfterEach {
+        cd $sourceRepo
+        Remove-Item $testDrive/* -Recurse -Force
+    }
+
+    It "Parameter validation" {
+        {
+            ./Generate-GitBranches.ps1 -ErrorAction Stop
+        } | Should -Throw "-Path cannot be empty"
+    }
+
+    It "Creates branches of a target repo" {
+        ./Generate-GitBranches.ps1 -TargetRepoPath $destinationRepo -ErrorAction Stop
+
+        $branches = git branch | % { $_.Trim() } | ? { $_ -match '^steam-' }
+        $branches.Count | Should -Be $games.Count
+        foreach ($b in $branches) {
+            git ls-tree -r --name-only $b | Should -Be @(
+                '.env'
+                '.gitlab-ci.yml'
+                '.state'
+                'build.sh'
+                'build/Dockerfile'
+                'notify.sh'
+                'update/Dockerfile'
+            )
+        }
+    }
+
+    It "Updates branches of a target repo" {
+        # Create branches first
+        $currentBranch = git rev-parse --abbrev-ref HEAD
+        if ($LASTEXITCODE) { throw }
+        foreach ($g in $games) {
+            $branch = "$( $g['game_platform'] )-$( $g['game_engine'] )-$( $g['game'] )"
+            git checkout -b "$branch"
+            if ($LASTEXITCODE) { throw }
+        }
+        git checkout "$currentBranch"
+        if ($LASTEXITCODE) { throw }
+
+        ./Generate-GitBranches.ps1 -TargetRepoPath $destinationRepo -ErrorAction Stop
+
+        $branches = git branch | % { $_.Trim() } | ? { $_ -match '^steam-' }
+        $branches.Count | Should -Be $games.Count
+        foreach ($b in $branches) {
+            git ls-tree -r --name-only $b | Should -Be @(
+                '.env'
+                '.gitlab-ci.yml'
+                '.state'
+                'build.sh'
+                'build/Dockerfile'
+                'notify.sh'
+                'update/Dockerfile'
+            )
+        }
+    }
+
+}

Generate-GitBranches.ps1

@@ -46,7 +46,7 @@ try {
         }
         $masterTrackedFiles = git ls-files
         if ($LASTEXITCODE) { throw }
-        $existingBranch = git rev-parse --verify $branch
+        $existingBranch = git rev-parse --verify $branch 2>$null
         if ($existingBranch) {
             "Updating branch '$branch'" | Write-Host -ForegroundColor Green
             if ($Pull) {
@@ -63,6 +63,7 @@ try {
             if ($LASTEXITCODE) { throw }
         }
 
+        "Checking out files" | Write-Host -ForegroundColor Green
         $masterTrackedFiles | Get-Item -Force | Remove-Item -Recurse -Force
         git checkout master -- build
         if ($LASTEXITCODE) { throw }
@@ -98,6 +99,7 @@ BASE_SIZE=0
 LAYERED_SIZE=0
 '@ | Out-File .state -Encoding utf8 -Force
 
+        "Committing files" | Write-Host -ForegroundColor Green
         git add .
         if ($LASTEXITCODE) { throw }
         $msg = if ($existingBranch) { "Update files" } else { "Add files" }