Test and document non-nix build

.github/workflows/build.yml

@@ -9,12 +9,9 @@ on:
   workflow_dispatch:
 
 jobs:
-  build:
-    name: build
+  nix-build:
+    name: nix-build
     runs-on: ubuntu-latest
-    permissions:
-      pages: write
-      id-token: write
     steps:
 
       - name: checkout
@@ -27,6 +24,69 @@ jobs:
         run: |
           nix develop --command bash -c "cd frontend && wasm32-wasi-cabal update && exec ./build.sh --debuginfo --low-memory-unused --converge --gufa --flatten --rereloop -Oz"
 
+  ghcup-build:
+    name: ghcup-build
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: ghc-wasm-meta
+        run: |
+          pushd "$(mktemp -d)"
+          curl -f -L --retry 5 https://gitlab.haskell.org/ghc/ghc-wasm-meta/-/archive/master/ghc-wasm-meta-master.tar.gz | tar xz --strip-components=1
+          SKIP_GHC=1 ./setup.sh
+          ~/.ghc-wasm/add_to_github_path.sh
+          popd
+
+      - name: wasm32-wasi-ghc
+        run: |
+          ghcup config add-release-channel https://raw.githubusercontent.com/haskell/ghcup-metadata/develop/ghcup-cross-0.0.8.yaml
+          ghcup install ghc --set wasm32-wasi-9.10.0.20240412 -- $CONFIGURE_ARGS
+
+      - name: install-sass
+        run: |
+          npm install -g sass
+
+      - name: build-frontend
+        run: |
+          cd frontend
+          cabal \
+            --with-compiler=wasm32-wasi-ghc \
+            --with-hc-pkg=wasm32-wasi-ghc-pkg \
+            --with-hsc2hs=wasm32-wasi-hsc2hs \
+            update
+          ./build.sh --debuginfo --low-memory-unused --converge --gufa --flatten --rereloop -Oz
+
+  non-nix-build:
+    name: non-nix-build
+    runs-on: ubuntu-latest
+    permissions:
+      pages: write
+      id-token: write
+    steps:
+
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: ghc-wasm-meta
+        run: |
+          pushd "$(mktemp -d)"
+          curl -f -L --retry 5 https://gitlab.haskell.org/ghc/ghc-wasm-meta/-/archive/master/ghc-wasm-meta-master.tar.gz | tar xz --strip-components=1
+          ./setup.sh
+          ~/.ghc-wasm/add_to_github_path.sh
+          popd
+
+      - name: install-sass
+        run: |
+          npm install -g sass
+
+      - name: build-frontend
+        run: |
+          cd frontend
+          ./build.sh --debuginfo --low-memory-unused --converge --gufa --flatten --rereloop -Oz
+
       - name: upload-pages-artifact
         uses: actions/upload-pages-artifact@v3
         with:

README.md

@@ -19,27 +19,40 @@ under the hood.
 
 ## Building
 
+### With nix
+
 Within the `nix develop` shell:
 
 ```sh
 cd frontend
-npm install
 wasm32-wasi-cabal update
-./build.sh -Oz
+./build.sh
 ```
 
-The artifacts will be available in `frontend/dist`. The arguments
-passed to `build.sh` are redirected to `wasm-opt`, if omitted, a dev
-build without `wasm-opt` will be performed.
+If you pass additional arguments to `build.sh`, they will be
+redirected to `wasm-opt`, otherwise a dev build without `wasm-opt`
+will be performed.
+
+The artifacts will be available in `frontend/dist`.
+
+### Without nix
+
+You can set up the toolchain by either:
 
-They can also be built without nix, as long as the following
-dependencies are met:
+- Using
+  [`ghc-wasm-meta`](https://gitlab.haskell.org/ghc/ghc-wasm-meta#getting-started-without-nix)
+  directly to set up ghc head or ghc 9.10
+- Using [`ghcup`](https://www.haskell.org/ghcup/guide/#cross-support)
+  to set up ghc 9.10
 
-- `wasm32-wasi-ghc`/`wasm32-wasi-cabal` (use `ghc-9.10` branch, JSFFI is not
-  present in `ghc-9.6`/`ghc-9.8`)
-- `node` (at least `v21.2.0`)
-- `npm`
-- `sass`
+Then:
+
+```sh
+source ~/.ghc-wasm/env
+npm install -g sass
+cd frontend
+./build.sh
+```
 
 ## Acknowledgements
 

cabal.project

@@ -1,6 +1,6 @@
 packages: . hs2048
 
-index-state: 2024-04-15T08:03:57Z
+index-state: 2024-04-20T23:09:54Z
 
 if arch(wasm32)
   -- https://github.com/haskellari/splitmix/pull/73

frontend/build.sh

@@ -1,6 +1,12 @@
 #!/usr/bin/env bash
+
 set -e
 
+if [[ $PWD != */frontend ]]; then
+    echo "This script is meant to be run in the frontend directory"
+    exit 1
+fi
+
 if [ $# -eq 0 ]; then
     echo "Building for dev"
     dev_mode=true
@@ -13,7 +19,16 @@ rm -rf dist
 mkdir dist
 cp ./*.html dist/
 
-wasm32-wasi-cabal build ghc-wasm-miso-examples
+if command -v wasm32-wasi-cabal &>/dev/null; then
+    wasm32-wasi-cabal build ghc-wasm-miso-examples
+else
+    cabal \
+        --with-compiler=wasm32-wasi-ghc \
+        --with-hc-pkg=wasm32-wasi-ghc-pkg \
+        --with-hsc2hs=wasm32-wasi-hsc2hs \
+        build ghc-wasm-miso-examples
+fi
+
 hs_wasm_path=$(find .. -name "*.wasm")
 
 "$(wasm32-wasi-ghc --print-libdir)"/post-link.mjs \