Use the env to make save-always work

"github.event.inputs" apparently does not contain inputs to the action.

action.yaml

@@ -69,7 +69,10 @@ inputs:
 
   save-always:
     default: "false"
-    description: Always run the "post" script to save whatever is in the cache.
+    description: >-
+      Always run the "post" script to save whatever is in the cache, unless the
+      <skip-save> option is true, in which case the "post" script continues to
+      do nothing.
 
 outputs:
   cache-hit:
@@ -81,4 +84,4 @@ runs:
   using: node20
   main: dist/main.js
   post: dist/post.js
-  post-if: github.event.inputs.save-always || success()
+  post-if: success() || env.SETUP_VCPKG_SAVE_ALWAYS == 'true'

dist/main.js

@@ -166569,6 +166569,9 @@ async function main() {
     if (coreExports.getBooleanInput("ignore-reserve-cache-error")) {
       coreExports.saveState("IGNORE_RESERVE_CACHE_ERROR", "1");
     }
+    if (coreExports.getBooleanInput("save-always")) {
+      coreExports.exportVariable("SETUP_VCPKG_SAVE_ALWAYS", "true");
+    }
     const isWindows = getOS() === "Windows";
     const execOptions = {
       cwd: require$$1$4.join(process.env.GITHUB_WORKSPACE, path),

src/constants.ts

@@ -8,6 +8,7 @@ export const enum Inputs {
   path = "path",
   ignoreReserveCacheError = "ignore-reserve-cache-error",
   skipSave = "skip-save",
+  saveAlways = "save-always",
 }
 
 export const enum States {

src/main.ts

@@ -43,6 +43,10 @@ async function main() {
       core.saveState(States.ignoreReserveCacheError, "1");
     }
 
+    if (core.getBooleanInput(Inputs.saveAlways)) {
+      core.exportVariable("SETUP_VCPKG_SAVE_ALWAYS", "true");
+    }
+
     const isWindows = getOS() === "Windows";
     const execOptions = {
       cwd: join(process.env.GITHUB_WORKSPACE!, path),