fix: add native fallback for addPath

src/utils/path/addPath.ts

@@ -1,15 +1,30 @@
 import { addPath as ghAddPath } from "@actions/core"
 import { delimiter } from "path"
 import * as core from "@actions/core"
+import { exec } from "@actions/exec"
 
 /** An add path function that works locally or inside GitHub Actions */
-export function addPath(path: string) {
+export async function addPath(path: string) {
   try {
     ghAddPath(path)
   } catch (err) {
     core.error(err as Error)
-    core.error(`Failed to add ${path} to the percistent PATH. You should add it manually.`)
+    switch (process.platform) {
-    process.env.PATH = `${path}${delimiter}${process.env.PATH}`
+      case "win32": {
-    // TODO shell out to add path
+        await exec(`setx PATH=${path};%PATH%`)
+        break
+      }
+      case "linux":
+      case "darwin": {
+        await exec(`echo "export PATH=${path}:$PATH" >> ~/.profile`)
+        await exec(`source ~/.profile`)
+        core.info(`${path} was added to ~/.profile`)
+        break
+      }
+      default: {
+        core.error(`Failed to add ${path} to the percistent PATH. You should add it manually.`)
+        process.env.PATH = `${path}${delimiter}${process.env.PATH}`
+      }
+    }
   }
 }