Compile windows runners in linux

.github/workflows/release.yml

@@ -6,12 +6,35 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
+  compile_windows:
+    runs-on: ubuntu-latest
+
+    steps:
+      - run: |
+          curl https://get.wasmer.io -sSfL | sh
+          aws s3 sync s3://${{ secrets.S3_BUCKET_PUBLIC }}/lang-runners lang-runners
+          for runner in lang-runners/*.wasm; do
+            wasmer compile --target x86_64-pc-windows-msvc --llvm "$runner" -o "${runner/.wasm/.wjit}"
+            rm "$runner"
+          done
+      - uses: actions/upload-artifact@v2
+        with:
+          name: windows-runners
+          path: lang-runners/
+
   build:
+    needs: compile_windows
     runs-on: ${{ matrix.os }}-latest
 
     strategy:
       matrix:
-        os: [ubuntu, macos] #, windows]
+        include:
+          - os: ubuntu
+            features: build-llvm
+          - os: macos
+            features: build-llvm
+          - os: windows
+            features: ''
 
     steps:
       - uses: actions/checkout@v2
@@ -41,22 +64,20 @@ jobs:
       - run: aws s3 sync s3://${{ secrets.S3_BUCKET_BUILD }}/cli-assets dist
 
       - if: matrix.os == 'windows'
-        name: Install LLVM on windows
-        shell: bash
-        run: |
-          cargo install llvmenv
-          llvmenv init
-          llvmenv build-entry 11.0.0 -j4
-          llvmenv global 11.0.0
-          echo "LLVM_SYS_110_PREFIX=$(llvmenv prefix)" >> $GITHUB_ENV
+        uses: actions/download-artifact@v2
+        with:
+          name: windows-runners
+          path: compiled_runners
+      - if: matrix.os == 'windows'
+        run: echo "COMPILED_RUNNERS=compiled_runners" >>$GITHUB_ENV
       - if: matrix.os == 'macos'
         run: |
           brew install llvm
           echo "LLVM_SYS_110_PREFIX=$(brew --prefix llvm)" >> $GITHUB_ENV
       - if: matrix.os == 'ubuntu'
         run: sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"
 
-      - run: cargo build --release --no-default-features --features build-llvm
+      - run: cargo build --release --no-default-features --features "${{matrix.features}}"
         env:
           SENTRY_DSN: ${{ secrets.SENTRY_DSN }}
 

build.rs

@@ -9,62 +9,102 @@ use wasmer_compiler_llvm::LLVM as Compiler;
 
 use wasmer_engine::Artifact;
 
+enum CompilationSource {
+    Precompiled(PathBuf),
+    Compiler {
+        engine: wasmer::JITEngine,
+        runners_dir: PathBuf,
+        jit_ext: &'static str,
+        tunables: wasmer::BaseTunables,
+    },
+}
+
 fn main() {
-    let mut features = wasmer::CpuFeature::set();
-    for feat in env::var("CARGO_CFG_TARGET_FEATURE").unwrap().split(',') {
-        if let Ok(feat) = feat.parse() {
-            features.insert(feat);
+    let source = match env::var_os("COMPILED_RUNNERS") {
+        Some(dir) => CompilationSource::Precompiled(dir.into()),
+        None => {
+            let mut features = wasmer::CpuFeature::set();
+            for feat in env::var("CARGO_CFG_TARGET_FEATURE").unwrap().split(',') {
+                if let Ok(feat) = feat.parse() {
+                    features.insert(feat);
+                }
+            }
+            let target =
+                wasmer::Target::new(env::var("TARGET").unwrap().parse().unwrap(), features);
+            let tunables = wasmer::BaseTunables::for_target(&target);
+            let jit_ext = wasmer::JITArtifact::get_default_extension(target.triple());
+            let engine = wasmer::JIT::new(Compiler::new()).target(target).engine();
+
+            let runners_dir = fs::canonicalize("../logic/wasm-dist/lang-runners")
+                .expect("need to run logic/build-wasm.sh");
+
+            CompilationSource::Compiler {
+                engine,
+                runners_dir,
+                jit_ext,
+                tunables,
+            }
         }
-    }
-    let target = wasmer::Target::new(env::var("TARGET").unwrap().parse().unwrap(), features);
-    let tunables = wasmer::BaseTunables::for_target(&target);
-    let jit_ext = wasmer::JITArtifact::get_default_extension(target.triple());
-    let engine = wasmer::JIT::new(Compiler::new()).target(target).engine();
+    };
 
     let lang_runners = [("Python", "pyrunner"), ("Javascript", "jsrunner")];
 
-    let runners_dir = fs::canonicalize("../logic/wasm-dist/lang-runners")
-        .expect("need to run logic/build-wasm.sh");
     let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
 
     let mut match_lang = fs::File::create(out_dir.join("lang_runners.rs")).unwrap();
     writeln!(match_lang, "match lang {{").unwrap();
 
     for (lang, runner) in &lang_runners {
-        let mut src = runners_dir.join(runner);
-        src.set_extension("wasm");
-        let mut dst = out_dir.join(runner);
-        dst.set_extension(jit_ext);
+        let (path, include_bin) = match &source {
+            CompilationSource::Precompiled(dir) => {
+                let mut wjit = dir.join(runner);
+                wjit.set_extension("wjit");
+                (wjit, true)
+            }
+            CompilationSource::Compiler {
+                engine,
+                runners_dir,
+                jit_ext,
+                tunables,
+            } => {
+                let mut src = runners_dir.join(runner);
+                src.set_extension("wasm");
+                let mut dst = out_dir.join(runner);
+                dst.set_extension(*jit_ext);
 
-        println!("compiling {}", runner);
+                println!("compiling {}", runner);
 
-        println!("cargo:rerun-if-changed={}", src.display());
+                println!("cargo:rerun-if-changed={}", src.display());
 
-        let needs_updating = src
-            .metadata()
-            .and_then(|m| Ok((m, dst.metadata()?)))
-            .and_then(|(src, dst)| Ok(src.modified()? > dst.modified()?))
-            .unwrap_or(true);
+                let needs_updating = src
+                    .metadata()
+                    .and_then(|m| Ok((m, dst.metadata()?)))
+                    .and_then(|(src, dst)| Ok(src.modified()? > dst.modified()?))
+                    .unwrap_or(true);
 
-        if needs_updating {
-            let wasm_source = fs::read(&src).unwrap();
-            let artifact = wasmer::JITArtifact::new(&engine, &wasm_source, &tunables).unwrap();
+                if needs_updating {
+                    let wasm_source = fs::read(&src).unwrap();
+                    let artifact =
+                        wasmer::JITArtifact::new(engine, &wasm_source, tunables).unwrap();
 
-            fs::write(&dst, artifact.serialize().unwrap()).unwrap();
-        }
+                    fs::write(&dst, artifact.serialize().unwrap()).unwrap();
+                }
+
+                (dst, cfg!(feature = "build-llvm"))
+            }
+        };
 
         writeln!(
             match_lang,
             "    Lang::{} => lang_runner!({}({:?}){}),",
             lang,
-            //
-            if cfg!(feature = "build-llvm") {
+            if include_bin {
                 "include_bytes!"
             } else {
                 "&std::fs::read"
             },
-            dst,
-            if cfg!(feature = "build-llvm") {
+            path,
+            if include_bin {
                 ""
             } else {
                 r#".expect("should compile with --features=build-llvm when distributing")"#