feat: migrate generator to Nickel

Author: develop7

.github/actions/build-generator/action.yaml

@@ -2,38 +2,41 @@ name: Dockerfile Generator
 on:
   push:
     paths:
-      - generator
+      - '**/*.ncl'
+      - 'template/Dockerfile.ncl'
+      - 'generate.sh'
+      - '.github/workflows/generator.yml'
   workflow_dispatch:
     inputs:
-      debug_mode:
-        description: 'Enable debug mode'
-        type: boolean
-        default: false
-        required: false
+      ghc_line:
+        description: 'GHC line (for example 9.14)'
+        type: string
+        default: '9.14'
+        required: true
+      variant:
+        description: 'Debian variant (for example bookworm)'
+        type: string
+        default: 'bookworm'
+        required: true
 
 jobs:
-  build:
+  generate:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v5.0.0
-      - uses: ./.github/actions/build-generator
-#        with:
-#          debug_mode: ${{ github.event.inputs.debug_mode }}
-      - name: Run generator
-        working-directory: generator
-        run: stack exec generator -- --help
+      - name: Install Nickel
+        uses: cachix/install-nix-action@v31
 
-      - name: Copy generator binary to artifacts
-        working-directory: generator
+      - name: Install nickel binary
+        run: nix profile install nixpkgs#nickel
+
+      - name: Generate selected Dockerfile
         run: |
-          mkdir -p ../artifacts
-          stack --local-bin-path=../artifacts install
-      - name: Upload generated artifact to a release
-        uses: softprops/action-gh-release@v2.4.1
-        with:
-          name: Generator
-          tag_name: generator-binary
-          prerelease: true
-          overwrite_files: 'true'
-          files: |
-            artifacts/generator
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            ./generate.sh "${{ github.event.inputs.ghc_line }}/${{ github.event.inputs.variant }}.ncl" "${{ github.event.inputs.ghc_line }}/${{ github.event.inputs.variant }}/Dockerfile"
+          else
+            ./generate.sh 9.14/bookworm.ncl 9.14/bookworm/Dockerfile
+          fi
+
+      - name: Verify no diff after generation
+        run: git diff --exit-code

.github/workflows/gen-pop-cache.yaml

@@ -1,5 +1,3 @@
-generator/.stack-work
-generator/dist-newstyle
 /.idea
 
 keys/*

.github/workflows/generator.yml

@@ -0,0 +1,14 @@
+{
+  stack = {
+    version = "3.3.1",
+    release_key = "C5705533DA4F78D8664B5DC0575159689BEFB442",
+    assets = {
+      aarch64 = { sha256sum = "bdd618ea5a9c921417727011f2ecd78987dffa5cee5e741108baf65a9b5b58ab" },
+      x86_64 = { sha256sum = "88d7e517342c125b0a098d9d578fe53e590618ae4b2427283a27408a1ebd06d8" },
+    },
+  },
+  cabal_install = {
+    version = "3.14.1.1",
+    release_key = "EAF2A9A722C0C96F2B431CA511AAD8CEDEE0CAEF",
+  },
+}

.gitignore

@@ -0,0 +1,27 @@
+let globals = import "_globals.ncl"
+in
+globals
+& {
+  distro = {
+    codename = "bookworm",
+    abbr = "deb12",
+    image = "debian:bookworm",
+  },
+  ghc = {
+    version = "9.10.3",
+    release_key = "88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4",
+    assets = {
+      aarch64 = {
+        sha256sum = "052789dfe7f6fba6dc3822de0da272e8a5bd358c37adae17d8e82cff39bc1008",
+        url = "https://downloads.haskell.org/~ghc/9.10.3/ghc-9.10.3-aarch64-deb11-linux.tar.xz",
+      },
+      x86_64 = { sha256sum = "1ac63f04eac0ad551d45cbde38f27e0e3f43ceefd98833fae1fa3f2dbd042367" },
+    },
+  },
+  cabal_install = {
+    assets = {
+      aarch64 = { sha256sum = "f763fb2af2bc1ff174b7361a7d51109a585954f87a0e14f86d144f3bce28f7a9" },
+      x86_64 = { sha256sum = "73a463306c771e18ca22c0a9469176ffab0138ec5925adb5364ef47174e1adc5" },
+    },
+  },
+}