Add a Rust port of theme-check

.cargo/config.toml

@@ -0,0 +1,2 @@
+[resolver]
+incompatible-rust-versions = "fallback"

.github/workflows/ci.yml

@@ -44,6 +44,32 @@ jobs:
       - name: Check formatting
         run: pnpm format:check
 
+      - name: Check the Rust crate's copies of TypeScript data
+        run: |
+          diff -r packages/theme-check-node/configs crates/theme-check/src/node/configs
+          node -e "console.log(JSON.stringify(require('./packages/theme-check-common').allChecks.map((c) => c.meta)))" \
+            | diff - crates/theme-check/src/node/checks-meta.json
+
+  rust:
+    runs-on: ubuntu-latest
+    name: Rust
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - name: Check formatting
+        run: cargo fmt --all --check
+
+      - name: Run the unit tests and the specs
+        run: cargo test --workspace --locked
+
+      - name: Check that the crates package and build on their own
+        run: cargo publish --dry-run --workspace --locked
+
+      - name: Check that the crates have the version of crates/theme-check/package.json
+        run: |
+          cargo metadata --no-deps --format-version 1 \
+            | jq -e --arg version "$(jq -r .version crates/theme-check/package.json)" 'all(.packages[]; .version == $version)'
+
   e2e:
     runs-on: ubuntu-latest
     name: E2E tests

.github/workflows/release.yml

@@ -13,6 +13,8 @@ env:
 jobs:
   publish-packages:
     runs-on: ubuntu-latest
+    outputs:
+      hasChangesets: ${{ steps.changesets.outputs.hasChangesets }}
     permissions:
       contents: write
       pull-requests: write
@@ -93,3 +95,54 @@ jobs:
         run: pnpm publish:ovsx
         env:
           OVSX_PAT: ${{ secrets.OPENVSX_TOKEN }}
+
+  # Its own job, so no npm package runs where a crates.io token can be had.
+  publish-crates:
+    needs: publish-packages
+    if: needs.publish-packages.outputs.hasChangesets == 'false'
+    runs-on: ubuntu-latest
+    environment: crates-io
+    permissions:
+      contents: read
+      id-token: write
+
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      # Until theme-check is on crates.io, published once by hand with a trusted publisher for
+      # this workflow and environment, this publishes nothing. After a partial publish, the next
+      # run does the rest.
+      - name: List the crates whose version isn't on crates.io
+        id: crates
+        run: |
+          version=$(jq -r .version crates/theme-check/package.json)
+          on_crates_io() {
+            code=$(curl -s --retry 3 -o /dev/null -w '%{http_code}' -A 'Shopify/theme-tools release' "https://crates.io/api/v1/crates/$1")
+            case $code in
+              200) return 0 ;;
+              404) return 1 ;;
+              *) echo "::error::crates.io answered $code for $1"; exit 1 ;;
+            esac
+          }
+          list=
+          if on_crates_io theme-check; then
+            for crate in liquid-ast liquid-parser theme-check; do
+              on_crates_io "$crate/$version" || list="$list $crate"
+            done
+          fi
+          echo "list=$list" >> $GITHUB_OUTPUT
+
+      - name: Exchange the Actions identity token for a crates.io token
+        id: crates-io-auth
+        if: steps.crates.outputs.list != ''
+        uses: rust-lang/crates-io-auth-action@c6f97d42243bad5fab37ca0427f495c86d5b1a18 # v1.0.5
+
+      # In dependency order.
+      - name: Publish the crates to crates.io
+        if: steps.crates.outputs.list != ''
+        run: for crate in $CRATES; do cargo publish -p "$crate" --locked; done
+        env:
+          CRATES: ${{ steps.crates.outputs.list }}
+          CARGO_REGISTRY_TOKEN: ${{ steps.crates-io-auth.outputs.token }}

.gitignore

@@ -16,6 +16,7 @@ TODO
 tsconfig.builinfo
 tsconfig.tsbuildinfo
 pnpm-debug.log*
+/target
 package-lock.json
 .npmrc
 packages/theme-check-docs-updater/data

Cargo.toml

@@ -0,0 +1,21 @@
+[workspace]
+resolver = "2"
+members = ["crates/liquid-ast", "crates/liquid-parser", "crates/theme-check"]
+
+# The release sets the version from crates/theme-check/package.json, which changesets bumps.
+[workspace.package]
+version = "0.1.0"
+edition = "2021"
+rust-version = "1.84"
+license = "MIT"
+repository = "https://github.com/Shopify/theme-tools"
+
+[workspace.dependencies]
+liquid-ast = { path = "crates/liquid-ast", version = "0.1.0" }
+liquid-parser = { path = "crates/liquid-parser", version = "0.1.0" }
+
+[profile.release]
+lto = "fat"
+codegen-units = 1
+panic = "abort"
+debug = 1

crates/liquid-ast/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "liquid-ast"
+description = "The syntax tree of Liquid HTML templates, as @shopify/liquid-html-parser builds it"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true