Fix cs bin directory on the M1 runner

Author: Gedochao

.github/workflows/test.yml

@@ -31,6 +31,8 @@ jobs:
     - run: echo 'name := "foo"' > build.sbt
     - id: scala-cli-setup
       uses: ./
+      env:
+        COURSIER_BIN_DIR: ${{ github.workspace }}/cs/bin
       with:
         jvm: ${{ matrix.jvm }}
         apps: sbt sbtn ammonite bloop:1.4.11

src/main.ts

@@ -139,9 +139,15 @@ async function run(): Promise<void> {
       }
       apps.push(`scala-cli${version ? `:${version}` : ''}`)
       if (value && apps.length) {
-        const coursierBinDir = path.join(os.homedir(), 'cs', 'bin')
-        core.exportVariable('COURSIER_BIN_DIR', coursierBinDir)
-        core.addPath(coursierBinDir)
+        if (process.env.COURSIER_BIN_DIR) {
+          core.addPath(process.env.COURSIER_BIN_DIR)
+        } else {
+          const coursierBinDir = path.join(os.homedir(), 'cs', 'bin')
+          core.exportVariable('COURSIER_BIN_DIR', coursierBinDir)
+          core.addPath(coursierBinDir)
+        }
+        // eslint-disable-next-line no-console
+        console.log('COURSIER_BIN_DIR', process.env.COURSIER_BIN_DIR)
         await cs('install', '--contrib', ...apps)
         core.setOutput(
           'scala-cli-version',