.github: Factor WebAssembly build out to justfile

.github/workflows/build.yml

@@ -45,25 +45,21 @@ jobs:
           ATTIC_CACHE: ${{ secrets.ATTIC_CACHE }}
           ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
 
-      - name: Build and run tests
+      - name: Cache dev shell
         run: |
+          .ci/cache-shell.sh
           system=$(nix-instantiate --eval -E 'builtins.currentSystem')
           echo system=$system >>$GITHUB_ENV
+
+      - name: Build and run tests
+        run: |
           tests=$(nix build .#internalMatrix."$system".\"${{ matrix.nix }}\".attic-tests --no-link --print-out-paths -L)
           find "$tests/bin" -exec {} \;
 
       - name: Build WebAssembly crates
         if: runner.os == 'Linux'
         run: |
-          # https://github.com/rust-lang/rust/issues/122357
-          export RUST_MIN_STACK=16777216
-
-          pushd attic
-          nix develop .# --command -- cargo build --target wasm32-unknown-unknown --no-default-features -F chunking -F stream
-          popd
-          pushd token
-          nix develop .# --command -- cargo build --target wasm32-unknown-unknown
-          popd
+          .ci/run just ci-build-wasm
 
       # TODO: Just take a diff of the list of store paths, also abstract all of this out
       - name: Push build artifacts

justfile

@@ -17,3 +17,18 @@ with-nix version *command:
 		eval "$hook"; \
 		CARGO_TARGET_DIR="{{ base }}/target/nix-{{ version }}" \
 		{{ command }}
+
+# (CI) Build WebAssembly crates
+ci-build-wasm:
+	#!/usr/bin/env bash
+	set -euxo pipefail
+
+	# https://github.com/rust-lang/rust/issues/122357
+	export RUST_MIN_STACK=16777216
+
+	pushd attic
+	cargo build --target wasm32-unknown-unknown --no-default-features -F chunking -F stream
+	popd
+	pushd token
+	cargo build --target wasm32-unknown-unknown
+	popd