From b8ef8e1754ef62d148ff9db830dfe7138f71764e Mon Sep 17 00:00:00 2001
From: Friedrich von Never <friedrich@fornever.me>
Date: Mon, 2 Dec 2024 23:11:19 +0100
Subject: [PATCH] (#256) CI: fix Docker tagging

General approach copied from https://github.com/ForNeVeR/fornever.me
---
 .github/workflows/docker.yml | 20 ++++++++------------
 Emulsion.sln                 |  1 +
 scripts/Get-Version.ps1      | 25 +++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 12 deletions(-)
 create mode 100644 scripts/Get-Version.ps1

diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index ffacc338..89ad405c 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -19,15 +19,13 @@ jobs:
   publish:
     runs-on: ubuntu-22.04
     steps:
-      - name: Extract metadata for Docker
-        if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: |
-            codingteam/emulsion
-          tags: |
-            type=ref,event=branch
+      - name: Clone the repository
+        uses: actions/checkout@v4
+
+      - name: Read version from ref
+        id: version
+        shell: pwsh
+        run: echo "version=$(./scripts/Get-Version.ps1 -RefName $env:GITHUB_REF)" >> $env:GITHUB_OUTPUT
 
       - name: Login to Docker Hub
         if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')
@@ -39,7 +37,5 @@ jobs:
       - name: Build and Push Docker Images
         uses: docker/build-push-action@v6
         with:
-          tags: |
-            ${{ steps.meta.outputs.tags }}
-            codingteam/emulsion:latest
+          tags: codingteam/emulsion:latest,codingteam/emulsion:v${{ steps.version.outputs.version }}
           push: ${{ github.event_name == 'push' && contains(github.ref, 'refs/tags/') && 'true' || 'false' }}
diff --git a/Emulsion.sln b/Emulsion.sln
index d49c6e31..b8debc3d 100644
--- a/Emulsion.sln
+++ b/Emulsion.sln
@@ -68,6 +68,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "scripts", "scripts", "{E3091B22-752A-4260-B4F3-903B9043479F}"
 	ProjectSection(SolutionItems) = preProject
 		scripts\Test-Encoding.ps1 = scripts\Test-Encoding.ps1
+		scripts\Get-Version.ps1 = scripts\Get-Version.ps1
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "LICENSES", "LICENSES", "{BBA60ACE-9FB4-4F3B-89EC-16A5BB9F5686}"
diff --git a/scripts/Get-Version.ps1 b/scripts/Get-Version.ps1
new file mode 100644
index 00000000..47678f33
--- /dev/null
+++ b/scripts/Get-Version.ps1
@@ -0,0 +1,25 @@
+# SPDX-FileCopyrightText: 2024 Friedrich von Never <friedrich@fornever.me>
+#
+# SPDX-License-Identifier: MIT
+
+param(
+    [string] $RefName,
+    [string] $RepositoryRoot = "$PSScriptRoot/..",
+
+    $ProjectFile = "$RepositoryRoot/Emulsion/Emulsion.fsproj"
+)
+
+$ErrorActionPreference = 'Stop'
+Set-StrictMode -Version Latest
+
+Write-Host "Determining version from ref `"$RefName`"…"
+if ($RefName -match '^refs/tags/v') {
+    $version = $RefName -replace '^refs/tags/v', ''
+    Write-Host "Pushed ref is a version tag, version: $version"
+} else {
+    [xml] $props = Get-Content $ProjectFile
+    $version = $props.Project.PropertyGroup.Version
+    Write-Host "Pushed ref is a not version tag, get version from $($ProjectFile): $version"
+}
+
+Write-Output $version