feat: add support for mise.toml file

Author: gperdomor

__tests__/main.test.ts

@@ -114,6 +114,9 @@ describe('main tests', () => {
       ${'{"devEngines": {"runtime": [{"name": "bun"}, {"name": "node", "version": "22.0.0"}]}}'} | ${'22.0.0'}
       ${'[tools]\ngo="latest"\nnode = "24.10"'}                                                  | ${'24.10'}
       ${'[tools]\nnode = "22.12"'}                                                               | ${'22.12'}
+      ${'[tools]\ngo="latest"\nnode = "24.10"'}                                                  | ${'24.10'}
+      ${'[tools]\nnode = { version = "22.20" }'}                                                 | ${'22.20'}
+      ${'[tools]\nnode = { postinstall = "corepack enable" }'}                                   | ${null}
     `.it('parses "$contents"', ({contents, expected}) => {
       const existsSpy = jest.spyOn(fs, 'existsSync');
       existsSpy.mockImplementation(() => true);

dist/cache-save/index.js

@@ -50602,15 +50602,18 @@ function getNodeVersionFromFile(versionFilePath) {
     catch {
         core.info('Node version file is not JSON file');
     }
-    // Try parsing the file as an MISE `mise.toml` file.
+    // Try parsing the file as a mise `mise.toml` file.
     try {
         const manifest = (0, js_toml_1.load)(contents);
         if (manifest?.tools?.node) {
             const node = manifest.tools.node;
             if (typeof node === 'object' && node?.version) {
                 return node.version;
             }
-            return node;
+            if (typeof node === 'string') {
+                return node;
+            }
+            return null;
         }
     }
     catch {

dist/setup/index.js

@@ -84097,15 +84097,18 @@ function getNodeVersionFromFile(versionFilePath) {
     catch {
         core.info('Node version file is not JSON file');
     }
-    // Try parsing the file as an MISE `mise.toml` file.
+    // Try parsing the file as a mise `mise.toml` file.
     try {
         const manifest = (0, js_toml_1.load)(contents);
         if (manifest?.tools?.node) {
             const node = manifest.tools.node;
             if (typeof node === 'object' && node?.version) {
                 return node.version;
             }
-            return node;
+            if (typeof node === 'string') {
+                return node;
+            }
+            return null;
         }
     }
     catch {

src/util.ts

@@ -69,7 +69,7 @@ export function getNodeVersionFromFile(versionFilePath: string): string | null {
     core.info('Node version file is not JSON file');
   }
 
-  // Try parsing the file as an MISE `mise.toml` file.
+  // Try parsing the file as a mise `mise.toml` file.
   try {
     const manifest: Record<string, any> = load(contents);
     if (manifest?.tools?.node) {
@@ -79,7 +79,11 @@ export function getNodeVersionFromFile(versionFilePath: string): string | null {
         return node.version;
       }
 
-      return node;
+      if (typeof node === 'string') {
+        return node;
+      }
+
+      return null;
     }
   } catch {
     core.info('Node version file is not TOML file');