fix Path env on Windows (#268)

* fix Path env on Windows

* show GCC version

Author: shogo82148

.github/workflows/test.yml

@@ -42,5 +42,6 @@ jobs:
           perl-version: "5.30.0"
           distribution: ${{ matrix.dist }}
       - run: perl -V
+      - run: gcc --version
 
       - run: npm run format-check

src/strawberry.ts

@@ -205,10 +205,15 @@ export async function getPerl(version: string) {
     core.debug('Perl tool is cached under ' + toolPath);
   }
 
-  const perlPath = path.join(toolPath, 'perl', 'bin');
-  const cPath = path.join(toolPath, 'c', 'bin');
-  core.addPath(perlPath);
-  core.addPath(cPath); // for gcc-mingw bundled with strawberry perl
+  // remove pre-installed Strawberry Perl and MinGW from Path
+  let pathEnv = (process.env.PATH || '').split(path.delimiter);
+  pathEnv = pathEnv.filter(p => !p.match(/.*(?:Strawberry|mingw).*/i));
+
+  // add our new Strawberry Portable Perl Paths
+  pathEnv.unshift(path.join(toolPath, 'site', 'bin'));
+  pathEnv.unshift(path.join(toolPath, 'c', 'bin'));
+  pathEnv.unshift(path.join(toolPath, 'perl', 'bin'));
+  core.exportVariable('PATH', pathEnv.join(path.delimiter));
 }
 
 async function acquirePerl(version: PerlVersion): Promise<string> {