feat: add support for mise.toml file

Author: gperdomor

__tests__/main.test.ts

@@ -94,23 +94,25 @@ describe('main tests', () => {
 
   describe('getNodeVersionFromFile', () => {
     each`
-      contents                                     | expected
-      ${'12'}                                      | ${'12'}
-      ${'12.3'}                                    | ${'12.3'}
-      ${'12.3.4'}                                  | ${'12.3.4'}
-      ${'v12.3.4'}                                 | ${'12.3.4'}
-      ${'lts/erbium'}                              | ${'lts/erbium'}
-      ${'lts/*'}                                   | ${'lts/*'}
-      ${'nodejs 12.3.4'}                           | ${'12.3.4'}
-      ${'ruby 2.3.4\nnodejs 12.3.4\npython 3.4.5'} | ${'12.3.4'}
-      ${''}                                        | ${''}
-      ${'unknown format'}                          | ${'unknown format'}
-      ${'  14.1.0  '}                              | ${'14.1.0'}
-      ${'{"volta": {"node": ">=14.0.0 <=17.0.0"}}'}| ${'>=14.0.0 <=17.0.0'}
-      ${'{"volta": {"extends": "./package.json"}}'}| ${'18.0.0'}
-      ${'{"engines": {"node": "17.0.0"}}'}         | ${'17.0.0'}
-      ${'[tools]\ngo="latest"\nnode = "24.10"'}    | ${'24.10'}
-      ${'{}'}                                      | ${null}
+      contents                                                 | expected
+      ${'12'}                                                  | ${'12'}
+      ${'12.3'}                                                | ${'12.3'}
+      ${'12.3.4'}                                              | ${'12.3.4'}
+      ${'v12.3.4'}                                             | ${'12.3.4'}
+      ${'lts/erbium'}                                          | ${'lts/erbium'}
+      ${'lts/*'}                                               | ${'lts/*'}
+      ${'nodejs 12.3.4'}                                       | ${'12.3.4'}
+      ${'ruby 2.3.4\nnodejs 12.3.4\npython 3.4.5'}             | ${'12.3.4'}
+      ${''}                                                    | ${''}
+      ${'unknown format'}                                      | ${'unknown format'}
+      ${'  14.1.0  '}                                          | ${'14.1.0'}
+      ${'{"volta": {"node": ">=14.0.0 <=17.0.0"}}'}            | ${'>=14.0.0 <=17.0.0'}
+      ${'{"volta": {"extends": "./package.json"}}'}            | ${'18.0.0'}
+      ${'{"engines": {"node": "17.0.0"}}'}                     | ${'17.0.0'}
+      ${'[tools]\ngo="latest"\nnode = "24.10"'}                | ${'24.10'}
+      ${'[tools]\nnode = { version = "22.20" }'}               | ${'22.20'}
+      ${'[tools]\nnode = { postinstall = "corepack enable" }'} | ${null}
+      ${'{}'}                                                  | ${null}
     `.it('parses "$contents"', ({contents, expected}) => {
       const existsSpy = jest.spyOn(fs, 'existsSync');
       existsSpy.mockImplementation(() => true);

dist/cache-save/index.js

@@ -93333,15 +93333,18 @@ function getNodeVersionFromFile(versionFilePath) {
     catch (_g) {
         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 ((_d = manifest === null || manifest === void 0 ? void 0 : manifest.tools) === null || _d === void 0 ? void 0 : _d.node) {
             const node = manifest.tools.node;
             if (typeof node === 'object' && (node === null || node === void 0 ? void 0 : node.version)) {
                 return node.version;
             }
-            return node;
+            if (typeof node === 'string') {
+                return node;
+            }
+            return null;
         }
     }
     catch (_h) {

dist/setup/index.js

@@ -103848,15 +103848,18 @@ function getNodeVersionFromFile(versionFilePath) {
     catch (_g) {
         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 ((_d = manifest === null || manifest === void 0 ? void 0 : manifest.tools) === null || _d === void 0 ? void 0 : _d.node) {
             const node = manifest.tools.node;
             if (typeof node === 'object' && (node === null || node === void 0 ? void 0 : node.version)) {
                 return node.version;
             }
-            return node;
+            if (typeof node === 'string') {
+                return node;
+            }
+            return null;
         }
     }
     catch (_h) {

src/util.ts

@@ -57,7 +57,7 @@ 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) {
@@ -67,7 +67,11 @@ 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');