refactor: use custom prebuild llvm distribution on ubuntu

.github/actions/install-llvm/dist/index.js

@@ -1114,7 +1114,14 @@ async function execute(cmd) {
 (async () => {
     try {
         if(isLinux) {
-            await exec.exec("sudo apt install llvm-8 llvm-8-* liblld-8*");
+            let llvmCachedPath = tc.find("llvm", "8.0.1", "linux");
+            if(!llvmCachedPath) {
+                llvmCachedPath = await tc.downloadTool("https://github.com/mun-lang/build-support/releases/download/llvm-8.0.1/llvm-8.0.1-ubuntu-12.04-bionic.tar.xz")
+                    .then(downloadPath => tc.extractTar(downloadPath, null, "xJ"))
+                    .then(extractPath => tc.cacheDir(extractPath, "llvm", "8.0.1", "linux"));
+            }
+            core.addPath(`${llvmCachedPath}/bin`)
+            core.exportVariable('LIBCLANG_PATH', `${llvmCachedPath}/bin`)
         } else if(isMacOS) {
             await exec.exec("brew install llvm@8")
             let llvmPath = await execute("brew --prefix llvm@8");

.github/actions/install-llvm/index.js

@@ -30,7 +30,14 @@ export async function execute(cmd) {
 (async () => {
     try {
         if(isLinux) {
-            await exec.exec("sudo apt install llvm-8 llvm-8-* liblld-8*");
+            let llvmCachedPath = tc.find("llvm", "8.0.1", "linux");
+            if(!llvmCachedPath) {
+                llvmCachedPath = await tc.downloadTool("https://github.com/mun-lang/build-support/releases/download/llvm-8.0.1/llvm-8.0.1-ubuntu-12.04-bionic.tar.xz")
+                    .then(downloadPath => tc.extractTar(downloadPath, null, "xJ"))
+                    .then(extractPath => tc.cacheDir(extractPath, "llvm", "8.0.1", "linux"));
+            }
+            core.addPath(`${llvmCachedPath}/bin`)
+            core.exportVariable('LIBCLANG_PATH', `${llvmCachedPath}/bin`)
         } else if(isMacOS) {
             await exec.exec("brew install llvm@8")
             let llvmPath = await execute("brew --prefix llvm@8");

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
 
   check:
     name: Check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
         with:
@@ -38,9 +38,9 @@ jobs:
       fail-fast: false
       matrix:
         config:
-        - { os: "ubuntu-latest", toolchain: "stable"}
-        - { os: "ubuntu-latest", toolchain: "beta"}
-        - { os: "ubuntu-latest", toolchain: "nightly"}
+        - { os: "ubuntu-20.04", toolchain: "stable"}
+        - { os: "ubuntu-20.04", toolchain: "beta"}
+        - { os: "ubuntu-20.04", toolchain: "nightly"}
         - { os: "windows-2016", toolchain: "stable"}
         - { os: "macOS-latest", toolchain: "stable"}
     steps:
@@ -60,22 +60,22 @@ jobs:
         uses: ./.github/actions/install-llvm
 
       - name: Cargo build
-        if: ${{ matrix.config.os == 'ubuntu-latest' && matrix.config.toolchain == 'stable' }}
+        if: ${{ matrix.config.os == 'ubuntu-20.04' && matrix.config.toolchain == 'stable' }}
         uses: actions-rs/cargo@v1
         continue-on-error: ${{ matrix.config.toolchain == 'nightly' }}
         with:
           command: build
 
       - name: Install mdbook
-        if: ${{ matrix.config.os == 'ubuntu-latest' && matrix.config.toolchain == 'stable' }}
+        if: ${{ matrix.config.os == 'ubuntu-20.04' && matrix.config.toolchain == 'stable' }}
         uses: actions-rs/[email protected]
         with:
           crate: mdbook
           version: latest
           use-tool-cache: true
 
       - name: mdbook test
-        if: ${{ matrix.config.os == 'ubuntu-latest' && matrix.config.toolchain == 'stable' }}
+        if: ${{ matrix.config.os == 'ubuntu-20.04' && matrix.config.toolchain == 'stable' }}
         run: mdbook test book -L target/debug/deps
 
       - name: Cargo test
@@ -87,7 +87,7 @@ jobs:
 
   style:
     name: Check Style
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     needs: check
     steps:
       - uses: actions/checkout@v2
@@ -118,7 +118,7 @@ jobs:
           args: --all-features
 
   tarpaulin:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     needs: check
     steps:
       - uses: actions/checkout@v2

.github/workflows/release.yml

@@ -1,9 +1,10 @@
 name: release
-on:
-  push:
-    branches:
-      - master
-      - release/*
+# on:
+#   push:
+#     branches:
+#       - master
+#       - release/*
+on: [pull_request, push]
 
 env:
   RUSTFLAGS: -Dwarnings
@@ -18,7 +19,7 @@ jobs:
       matrix:
         config:
         - {
-          os: "ubuntu-latest",
+          os: "ubuntu-20.04",
           dir: linux64,
           artifacts: "mun libmun_runtime.so"
         }