add all MISE_ env vars to cache key (#197)

Co-authored-by: jdx <[email protected]>

Author: zeitlinger

dist/index.js

@@ -65,7 +65,14 @@ async function restoreMiseCache(): Promise<string | undefined> {
   core.startGroup('Restoring mise cache')
   const version = core.getInput('version')
   const installArgs = core.getInput('install_args')
-  const { MISE_ENV } = process.env
+  // all env vars that start with MISE_ are used in the cache key
+  // this allows users to set MISE_ENV or other variables that affect the cache
+  // without having to modify the cache key prefix
+  const env_key = JSON.stringify(
+    Object.fromEntries(
+      Object.entries(process.env).filter(([key]) => key.startsWith('MISE_'))
+    )
+  )
   const cachePath = miseDir()
   const fileHash = await glob.hashFiles(
     [
@@ -101,8 +108,8 @@ async function restoreMiseCache(): Promise<string | undefined> {
   if (version) {
     primaryKey = `${primaryKey}-${version}`
   }
-  if (MISE_ENV) {
-    primaryKey = `${primaryKey}-${MISE_ENV}`
+  if (env_key) {
+    primaryKey = `${primaryKey}-${env_key}`
   }
   if (installArgs) {
     const tools = installArgs