feat: json5 support (#133)

Author: pi0

README.md

@@ -9,8 +9,8 @@ c12 (pronounced as /siːtwelv/, like c-twelve) is a smart configuration loader.
 
 ## Features
 
-- `.json`, `.js`, `.ts`, and `.mjs` config loader with [unjs/jiti](https://github.com/unjs/jiti)
-- `.jsonc` config support with [jsonc-parser](https://github.com/microsoft/node-jsonc-parser)
+- `.js`, `.ts`, `.cjs`, `.mjs` config loader with [unjs/jiti](https://github.com/unjs/jiti)
+- `.json`, `.json5` and `.jsonc` config support.
 - `.rc` config support with [unjs/rc9](https://github.com/unjs/rc9)
 - `.env` support with [dotenv](https://www.npmjs.com/package/dotenv)
 - Multiple sources merged with [unjs/defu](https://github.com/unjs/defu)

package.json

@@ -35,6 +35,7 @@
     "dotenv": "^16.3.2",
     "giget": "^1.2.1",
     "jiti": "^1.21.0",
+    "json5": "^2.2.3",
     "jsonc-parser": "^3.2.1",
     "mlly": "^1.5.0",
     "ohash": "^1.1.3",

pnpm-lock.yaml

@@ -56,6 +56,7 @@ export async function loadConfig<
         ".cts",
         ".json",
         ".jsonc",
+        ".json5",
       ],
       ...options.jitiOptions,
     });
@@ -329,6 +330,9 @@ async function resolveConfig<
   if (res.configFile!.endsWith(".jsonc")) {
     const { parse } = await import("jsonc-parser");
     res.config = parse(await readFile(res.configFile!, "utf8"));
+  } else if (res.configFile!.endsWith(".json5")) {
+    const { parse } = await import("json5");
+    res.config = parse(await readFile(res.configFile!, "utf8"));
   } else {
     res.config = options.jiti!(res.configFile!);
   }

src/loader.ts

@@ -1,7 +1,7 @@
-export default {
+{
   extends: "../.base",
   colors: {
     primary: "theme_primary",
     secondary: "theme_secondary",
   },
-};
+}

test/fixture/theme/config.ts test/fixture/theme/config.json5

@@ -143,7 +143,7 @@ describe("c12", () => {
               "secondary": "theme_secondary",
             },
           },
-          "configFile": "<path>/fixture/theme/config.ts",
+          "configFile": "<path>/fixture/theme/config.json5",
           "cwd": "<path>/fixture/theme",
           "meta": {},
           "source": "config",