feat: add support for mise.toml file

README.md

@@ -41,7 +41,7 @@ See [action.yml](action.yml)
     # Examples: 12.x, 10.15.1, >=10.15.0, lts/Hydrogen, 16-nightly, latest, node
     node-version: ''
 
-    # File containing the version Spec of the version to use.  Examples: package.json, .nvmrc, .node-version, .tool-versions.
+    # File containing the version Spec of the version to use.  Examples: package.json, mise.toml, .nvmrc, .node-version, .tool-versions.
     # If node-version and node-version-file are both provided the action will use version from node-version.
     node-version-file: ''
 

__tests__/main.test.ts

@@ -1,18 +1,18 @@
+import * as cache from '@actions/cache';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
-import * as tc from '@actions/tool-cache';
-import * as cache from '@actions/cache';
 import * as io from '@actions/io';
+import * as tc from '@actions/tool-cache';
 
 import fs from 'fs';
-import path from 'path';
 import osm from 'os';
+import path from 'path';
 
 import each from 'jest-each';
 
+import OfficialBuilds from '../src/distributions/official_builds/official_builds';
 import * as main from '../src/main';
 import * as util from '../src/util';
-import OfficialBuilds from '../src/distributions/official_builds/official_builds';
 
 describe('main tests', () => {
   let inputs = {} as any;
@@ -112,6 +112,11 @@ describe('main tests', () => {
       ${'{"engines": {"node": "17.0.0"}}'}                                                       | ${'17.0.0'}
       ${'{"devEngines": {"runtime": {"name": "node", "version": "22.0.0"}}}'}                    | ${'22.0.0'}
       ${'{"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);

package.json

@@ -36,7 +36,8 @@
     "@actions/http-client": "^2.2.1",
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^2.0.2",
-    "semver": "^7.6.3"
+    "semver": "^7.6.3",
+    "smol-toml": "^1.6.1"
   },
   "devDependencies": {
     "@types/jest": "^29.5.14",

src/util.ts

@@ -1,6 +1,7 @@
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 import * as io from '@actions/io';
+import {parse} from 'smol-toml';
 
 import fs from 'fs';
 import path from 'path';
@@ -68,6 +69,26 @@ export function getNodeVersionFromFile(versionFilePath: string): string | null {
     core.info('Node version file is not JSON file');
   }
 
+  // Try parsing the file as a mise `mise.toml` file.
+  try {
+    const manifest: Record<string, any> = parse(contents);
+    if (manifest?.tools?.node) {
+      const node = manifest.tools.node;
+
+      if (typeof node === 'object' && node?.version) {
+        return node.version;
+      }
+
+      if (typeof node === 'string') {
+        return node;
+      }
+
+      return null;
+    }
+  } catch {
+    core.info('Node version file is not TOML file');
+  }
+
   const found = contents.match(/^(?:node(js)?\s+)?v?(?<version>[^\s]+)$/m);
   return found?.groups?.version ?? contents.trim();
 }