Add images.json with auto readme and pre-commit

.github/workflows/build.yml

@@ -6,14 +6,22 @@ on:
     - cron: "0 18 * * 1"
 
 jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+      - id: set-matrix
+        run: "echo \"matrix=$(jq -cr '{image: [.[] | {name, context, dockerfile}]}' images.json)\" >> $GITHUB_OUTPUT"
   build_image:
     runs-on: ubuntu-latest
+    needs: prepare
     strategy:
-      matrix:
-        image:
-          - name: "beeper_bridge-manager"
-            context: ./beeper_bridge-manager
-            dockerfile: ./beeper_bridge-manager/docker/Dockerfile
+      matrix: ${{ fromJson(needs.prepare.outputs.matrix) }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.pre-commit-config.yaml

@@ -0,0 +1,15 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.3.0
+    hooks:
+      - id: check-yaml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+  - repo: local
+    hooks:
+      - id: generate-readme
+        name: Generate README
+        entry: python generate-readme.py
+        language: python
+        pass_filenames: false
+        files: ^images\.json$

README.md

@@ -0,0 +1,9 @@
+# Docker Images
+
+These are some custom images that are regularly built for AMD64 and ARM64 architectures.
+
+<!-- generate start -->
+| Name | Description |
+| --- | --- |
+| `ghcr.io/jake-walker/beeper_bridge-manager` | This is an exact build of Beeper's [bridge-manager](https://github.com/beeper/bridge-manager) but with an ARM64 build. |
+<!-- generate end -->

generate-readme.py

@@ -0,0 +1,28 @@
+import json
+
+with open("README.md", "r") as f:
+    readme = f.read()
+
+with open("images.json", "r") as f:
+    images_data = json.load(f)
+
+with open("README.md", "w") as f:
+    copying = True
+
+    for line in readme.splitlines():
+        if line == "<!-- generate start -->":
+            f.write(line + "\n")
+
+            # generate markdown table of images
+            f.write("| Name | Description |\n| --- | --- |\n")
+            for image in images_data:
+                f.write(
+                    f"| `ghcr.io/jake-walker/{image['name']}` | {image['description']} |\n"
+                )
+
+            copying = False
+        elif line == "<!-- generate end -->":
+            f.write(line + "\n")
+            copying = True
+        elif copying:
+            f.write(line + "\n")

images.json

@@ -0,0 +1,8 @@
+[
+  {
+    "name": "beeper_bridge-manager",
+    "context": "./beeper_bridge-manager",
+    "dockerfile": "./beeper_bridge-manager/docker/Dockerfile",
+    "description": "This is an exact build of Beeper's [bridge-manager](https://github.com/beeper/bridge-manager) but with an ARM64 build."
+  }
+]