Scala.js binding generator

.github/workflows/main.yml

@@ -59,7 +59,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         # moonbit removed from language matrix for now - causing CI failures
-        lang: [c, rust, teavm-java, go, csharp]
+        lang: [c, rust, teavm-java, go, csharp, scalajs]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
@@ -112,12 +112,16 @@ jobs:
       with:
         tinygo-version: 0.31.0
 
+    - uses: olafurpg/setup-scala@v11
+      if: matrix.lang == 'scalajs'
+
     - run: |
         cargo test \
           -p wit-bindgen-cli \
           -p wit-bindgen-${{ matrix.lang }} \
           --no-default-features \
           --features ${{ matrix.lang }}
+      if: ${{ (! (matrix.os == 'windows-latest' && matrix.lang == 'scalajs')) && (! (matrix.os == 'macos-latest' && matrix.lang == 'scalajs')) }} # setup-scala does not make sbt available on Windows, and the scalajs tests are very slow on macos
 
   test_unit:
     name: Crate Unit Tests
@@ -161,6 +165,7 @@ jobs:
     - run: cargo build --no-default-features --features csharp
     - run: cargo build --no-default-features --features markdown
     - run: cargo build --no-default-features --features moonbit
+    - run: cargo build --no-default-features --features scalajs
 
     # Feature combos of the `wit-bindgen` crate
     - run: cargo build --target wasm32-wasip1 -p wit-bindgen --no-default-features

Cargo.toml

@@ -47,6 +47,7 @@ wit-bindgen-go = { path = 'crates/go', version = '0.39.0' }
 wit-bindgen-csharp = { path = 'crates/csharp', version = '0.39.0' }
 wit-bindgen-markdown = { path = 'crates/markdown', version = '0.39.0' }
 wit-bindgen-moonbit = { path = 'crates/moonbit', version = '0.39.0' }
+wit-bindgen-scalajs = { path = 'crates/scalajs', version = '0.39.0' }
 wit-bindgen = { path = 'crates/guest-rust', version = '0.39.0', default-features = false }
 
 [[bin]]
@@ -63,6 +64,7 @@ wit-bindgen-moonbit = { workspace = true, features = ['clap'], optional = true }
 wit-bindgen-teavm-java = { workspace = true, features = ['clap'], optional = true }
 wit-bindgen-go = { workspace = true, features = ['clap'], optional = true }
 wit-bindgen-csharp = { workspace = true, features = ['clap'], optional = true }
+wit-bindgen-scalajs = { workspace = true, features = ['clap'], optional = true }
 wit-component = { workspace = true }
 wasm-encoder = { workspace = true }
 
@@ -75,6 +77,7 @@ default = [
   'go',
   'csharp',
   'moonbit',
+  'scalajs',
   'async',
 ]
 c = ['dep:wit-bindgen-c']
@@ -85,6 +88,7 @@ go = ['dep:wit-bindgen-go']
 csharp = ['dep:wit-bindgen-csharp']
 csharp-mono = ['csharp']
 moonbit = ['dep:wit-bindgen-moonbit']
+scalajs = ['dep:wit-bindgen-scalajs']
 async = []
 
 [dev-dependencies]

crates/scalajs/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "wit-bindgen-scalajs"
+authors = ["Daniel Vigovszky <[email protected]>"]
+version = { workspace = true }
+edition = { workspace = true }
+repository = { workspace = true }
+license = { workspace = true }
+homepage = 'https://github.com/bytecodealliance/wit-bindgen'
+description = """
+Scala.JS bindings generator for WIT and the component model, typically used
+through the `wit-bindgen-cli` crate.
+"""
+
+[dependencies]
+anyhow = { workspace = true }
+wit-bindgen-core = { workspace = true }
+heck = { workspace = true }
+clap = { workspace = true, optional = true }
+
+[dev-dependencies]
+test-helpers = { path = '../test-helpers' }

crates/scalajs/scala/build.properties

@@ -0,0 +1 @@
+sbt.version = 1.10.7

crates/scalajs/scala/build.sbt

@@ -0,0 +1,7 @@
+lazy val root = project
+  .in(file("."))
+  .settings(
+    name := "wit-bindgen-scalajs-test",
+    scalaVersion := "2.13.16",
+  )
+  .enablePlugins(ScalaJSPlugin)

crates/scalajs/scala/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.18.2")