use zip and unzip from path (#161)

__tests__/tool-cache.test.ts

@@ -287,9 +287,7 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipBin: string =
+        const zipPath: string = await io.which('zip')
-          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
-        const zipPath: string = path.join(__dirname, 'externals', zipBin)
         await exec.exec(`"${zipPath}`, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 
@@ -340,9 +338,7 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipBin: string =
+        const zipPath: string = await io.which('zip')
-          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
-        const zipPath = path.join(__dirname, 'externals', zipBin)
         await exec.exec(zipPath, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 

package-lock.json

@@ -1,6 +1,6 @@
 {
 	"name": "@actions/tool-cache",
-	"version": "1.1.0",
+	"version": "1.1.1",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {

src/tool-cache.ts

@@ -222,13 +222,9 @@ export async function extractZip(file: string, dest?: string): Promise<string> {
 
   if (IS_WINDOWS) {
     await extractZipWin(file, dest)
-  } else {
-    if (process.platform === 'darwin') {
-      await extractZipDarwin(file, dest)
   } else {
     await extractZipNix(file, dest)
   }
-  }
 
   return dest
 }
@@ -255,18 +251,7 @@ async function extractZipWin(file: string, dest: string): Promise<void> {
 }
 
 async function extractZipNix(file: string, dest: string): Promise<void> {
-  const unzipPath = path.join(__dirname, '..', 'scripts', 'externals', 'unzip')
+  const unzipPath = await io.which('unzip')
-  await exec(`"${unzipPath}"`, [file], {cwd: dest})
-}
-
-async function extractZipDarwin(file: string, dest: string): Promise<void> {
-  const unzipPath = path.join(
-    __dirname,
-    '..',
-    'scripts',
-    'externals',
-    'unzip-darwin'
-  )
   await exec(`"${unzipPath}"`, [file], {cwd: dest})
 }