Test with multiple toolchain versions (#135)

* Test for multiple version of toolchains

* Add `wasm-5.4.0-RELEASE` to `test.yml` workflow

* Test with 5.3.1 instead of 5.3.0

* Also test with macOS 11

* Test with Ubuntu 20.04

Co-authored-by: Max Desiatov <max@desiatov.com>

Author: kateinoigakukun

Diff for: .github/workflows/test.yml

@@ -8,7 +8,10 @@ jobs:
     name: Build and Test
     strategy:
       matrix:
-        os: [macOS-10.15, Ubuntu-18.04]
+        os: [macos-10.15, macos-11, ubuntu-18.04, ubuntu-20.04]
+        toolchain:
+          - wasm-5.3.1-RELEASE
+          - wasm-5.4.0-RELEASE
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
@@ -21,5 +24,6 @@ jobs:
           export SWIFTENV_ROOT="$HOME/.swiftenv"
           export PATH="$SWIFTENV_ROOT/bin:$PATH"
           eval "$(swiftenv init -)"
-          make bootstrap
+          SWIFT_VERSION=${{ matrix.toolchain }} make bootstrap
+          echo ${{ matrix.toolchain }} > .swift-version
           make test

Diff for: scripts/install-toolchain.sh

@@ -3,16 +3,17 @@ set -eu
 
 scripts_dir="$(cd "$(dirname $0)" && pwd)"
 
-swift_version="$(cat $scripts_dir/../.swift-version)"
-swift_tag="swift-$swift_version"
+default_swift_version="$(cat $scripts_dir/../.swift-version)"
+SWIFT_VERSION="${SWIFT_VERSION:-$default_swift_version}"
+swift_tag="swift-$SWIFT_VERSION"
 
 if [ -z "$(which swiftenv)" ]; then
   echo "swiftenv not installed, please install it before this script."
   exit 1
 fi
 
-if [ ! -z "$(swiftenv versions | grep $swift_version)" ]; then
-  echo "$swift_version is already installed."
+if [ ! -z "$(swiftenv versions | grep $SWIFT_VERSION)" ]; then
+  echo "$SWIFT_VERSION is already installed."
   exit 0
 fi