Add cron job to test against latest cranelift version every day

Fixes rust-lang#1212

Author: bjorn3

.github/workflows/nightly-cranelift.yml

@@ -0,0 +1,59 @@
+name: Test nightly Cranelift
+
+on:
+  push:
+  schedule:
+    - cron: '1 17 * * *' # At 01:17 UTC every day.
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cache cargo installed crates
+      uses: actions/cache@v2
+      with:
+        path: ~/.cargo/bin
+        key: ubuntu-latest-cargo-installed-crates
+
+    - name: Prepare dependencies
+      run: |
+        git config --global user.email "[email protected]"
+        git config --global user.name "User"
+        ./y.rs prepare
+
+    - name: Patch Cranelift
+      run: |
+        sed -i 's/cranelift-codegen = { version = "\w*.\w*.\w*", features = \["unwind", "all-arch"\] }/cranelift-codegen = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git", features = ["unwind", "all-arch"] }/' Cargo.toml
+        sed -i 's/cranelift-frontend = "\w*.\w*.\w*"/cranelift-frontend = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git" }/' Cargo.toml
+        sed -i 's/cranelift-module = "\w*.\w*.\w*"/cranelift-module = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git" }/' Cargo.toml
+        sed -i 's/cranelift-native = "\w*.\w*.\w*"/cranelift-native = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git" }/' Cargo.toml
+        sed -i 's/cranelift-jit = { version = "\w*.\w*.\w*", optional = true }/cranelift-jit = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git", optional = true }/' Cargo.toml
+        sed -i 's/cranelift-object = "\w*.\w*.\w*"/cranelift-object = { git = "https:\/\/github.com\/bytecodealliance\/wasmtime.git" }/' Cargo.toml
+
+        sed -i 's/gimli = { version = "0.25.0", default-features = false, features = \["write"\]}/gimli = { version = "0.26.1", default-features = false, features = ["write"] }/' Cargo.toml
+
+        cat Cargo.toml
+
+    - name: Build without unstable features
+      # This is the config rust-lang/rust uses for builds
+      run: ./y.rs build --no-unstable-features
+
+    - name: Build
+      run: ./y.rs build --sysroot none
+    - name: Test
+      run: |
+        # Enable backtraces for easier debugging
+        export RUST_BACKTRACE=1
+
+        # Reduce amount of benchmark runs as they are slow
+        export COMPILE_RUNS=2
+        export RUN_RUNS=2
+
+        # Enable extra checks
+        export CG_CLIF_ENABLE_VERIFIER=1
+
+        ./test.sh