Use case-insensitive key comparsion for cache keys

bundler.js

@@ -206,7 +206,7 @@ export async function bundleInstall(gemfile, lockFile, platform, engine, rubyVer
   await exec.exec('bundle', ['install', '--jobs', '4'])
 
   // @actions/cache only allows to save for non-existing keys
-  if (cachedKey !== key) {
+  if (!common.isExactKeyMatch(key, cachedKey)) {
     if (cachedKey) { // existing cache but Gemfile.lock differs, clean old gems
       await exec.exec('bundle', ['clean'])
     }

common.js

@@ -412,3 +412,15 @@ export async function setupJavaHome(rubyPrefix) {
     }
   })
 }
+
+// Determines if two keys are an exact match for the purposes of cache matching
+// Specifically, this is a case-insensitive match that ignores accents
+// From actions/cache@v3 src/utils/actionUtils.ts (MIT)
+export function isExactKeyMatch(key, cacheKey) {
+  return !!(
+      cacheKey &&
+      cacheKey.localeCompare(key, undefined, {
+          sensitivity: 'accent'
+      }) === 0
+  );
+}

dist/index.js

@@ -220,7 +220,7 @@ async function bundleInstall(gemfile, lockFile, platform, engine, rubyVersion, b
   await exec.exec('bundle', ['install', '--jobs', '4'])
 
   // @actions/cache only allows to save for non-existing keys
-  if (cachedKey !== key) {
+  if (!common.isExactKeyMatch(key, cachedKey)) {
     if (cachedKey) { // existing cache but Gemfile.lock differs, clean old gems
       await exec.exec('bundle', ['clean'])
     }
@@ -299,6 +299,7 @@ __nccwpck_require__.r(__webpack_exports__);
 /* harmony export */   isBundler1Default: () => (/* binding */ isBundler1Default),
 /* harmony export */   isBundler2Default: () => (/* binding */ isBundler2Default),
 /* harmony export */   isBundler2dot2Default: () => (/* binding */ isBundler2dot2Default),
+/* harmony export */   isExactKeyMatch: () => (/* binding */ isExactKeyMatch),
 /* harmony export */   isHeadVersion: () => (/* binding */ isHeadVersion),
 /* harmony export */   isSelfHostedRunner: () => (/* binding */ isSelfHostedRunner),
 /* harmony export */   isStableVersion: () => (/* binding */ isStableVersion),
@@ -730,6 +731,18 @@ async function setupJavaHome(rubyPrefix) {
   })
 }
 
+// Determines if two keys are an exact match for the purposes of cache matching
+// Specifically, this is a case-insensitive match that ignores accents
+// From actions/cache@v3 src/utils/actionUtils.ts (MIT)
+function isExactKeyMatch(key, cacheKey) {
+  return !!(
+      cacheKey &&
+      cacheKey.localeCompare(key, undefined, {
+          sensitivity: 'accent'
+      }) === 0
+  );
+}
+
 
 /***/ }),