feat: extends support with remote repo

README.md

@@ -13,7 +13,7 @@
 - RC config support with [unjs/rc9](https://github.com/unjs/rc9)
 - Multiple sources merged with [unjs/defu](https://github.com/unjs/defu)
 - `.env` support with [dotenv](https://www.npmjs.com/package/dotenv)
-- Support extending nested configurations
+- Support extending nested configurations from multiple local or git sourecs with [tiged](https://github.com/tiged/tiged)
 
 ## Usage
 
@@ -107,6 +107,9 @@ Extending can be nested and each layer can extend from one base or more.
 
 Final config is merged result of extended options and user options with [unjs/defu](https://github.com/unjs/defu).
 
+Each item in extends, is a string that can be either an absolute or relative path to current config file pointing to a config file for extending or directory containing config file.
+If it starts with either of `github:`, `gitlab:`, `bitbucket:` or `https:`, c12 autmatically clones it with [tiged](https://github.com/tiged/tiged).
+
 For custom merging strategies, you can directly access each layer with `layers` property.
 
 **Example:**

package.json

@@ -32,7 +32,8 @@
     "jiti": "^1.12.14",
     "mlly": "^0.4.1",
     "pathe": "^0.2.0",
-    "rc9": "^1.2.0"
+    "rc9": "^1.2.0",
+    "tiged": "^2.12.0"
   },
   "devDependencies": {
     "@nuxtjs/eslint-config-typescript": "latest",

src/loader.ts

@@ -1,7 +1,10 @@
+import { promises as fsp } from 'fs'
+import os from 'os'
 import { resolve, extname, dirname } from 'pathe'
 import createJiti from 'jiti'
 import * as rc9 from 'rc9'
 import defu from 'defu'
+import tiged from 'tiged'
 import { DotenvOptions, setupDotenv } from './dotenv'
 
 export interface InputConfig extends Record<string, any> {}
@@ -87,12 +90,22 @@ export async function loadConfig<T extends InputConfig=InputConfig> (opts: LoadC
   return r
 }
 
+const TIGED_PREFIXES = ['github:', 'gitlab:', 'bitbucket:', 'https://']
+
 async function extendConfig (config, configFile: string, cwd: string) {
   config._layers = config._layers || []
 
   const extendSources = (Array.isArray(config.extends) ? config.extends : [config.extends]).filter(Boolean)
   delete config.extends
-  for (const extendSource of extendSources) {
+  for (let extendSource of extendSources) {
+    if (TIGED_PREFIXES.some(prefix => extendSource.startsWith(prefix))) {
+      const tmpdir = resolve(os.tmpdir(), 'c12/git', extendSource.replace(/[#]/g, '_'))
+      await fsp.rmdir(tmpdir, { recursive: true })
+      const t = tiged(extendSource, { cache: true })
+      await t.clone(tmpdir)
+      extendSource = tmpdir
+    }
+
     const isDir = !extname(extendSource)
     const _cwd = resolve(cwd, isDir ? extendSource : dirname(extendSource))
     const _config = await loadConfigFile(_cwd, isDir ? configFile : extendSource)

test/index.test.ts

@@ -1,15 +1,13 @@
 import { fileURLToPath } from 'url'
-import { resolve } from 'pathe'
 import { expect, it, describe } from 'vitest'
 import { loadConfig } from '../src'
 
 describe('c12', () => {
-  it('load fixture config', async () => {
-    const fixtureDir = fileURLToPath(new URL('./fixture', import.meta.url))
-    const rFixture = (...segments: string[]) => resolve(fixtureDir, ...segments)
+  const r = path => fileURLToPath(new URL(path, import.meta.url))
 
+  it('load fixture config', async () => {
     const { config, layers } = await loadConfig({
-      cwd: fixtureDir,
+      cwd: r('./fixture'),
       dotenv: true,
       overrides: {
         overriden: true
@@ -41,8 +39,8 @@ describe('c12', () => {
             secondary: 'theme_secondary'
           }
         },
-        configFile: rFixture('theme/config.ts'),
-        cwd: rFixture('theme')
+        configFile: r('./fixture/theme/config.ts'),
+        cwd: r('./fixture/theme')
       },
       {
         config: {
@@ -52,14 +50,35 @@ describe('c12', () => {
             text: 'base_text'
           }
         },
-        configFile: rFixture('base/config.ts'),
-        cwd: rFixture('base')
+        configFile: r('./fixture/base/config.ts'),
+        cwd: r('./fixture/base')
       },
       {
         config: { devConfig: true },
-        configFile: rFixture('config.dev.ts'),
-        cwd: rFixture('.')
+        configFile: r('./fixture/config.dev.ts'),
+        cwd: r('./fixture')
       }
     ])
   })
+
+  it('extend from git repo', async () => {
+    const { config } = await loadConfig({
+      cwd: r('./fixture/new_dir'),
+      overrides: {
+        extends: ['github:unjs/c12/test/fixture']
+      }
+    })
+
+    expect(config).toMatchObject({
+      devConfig: true,
+      baseConfig: true,
+      colors: {
+        primary: 'user_primary',
+        text: 'base_text',
+        secondary: 'theme_secondary'
+      },
+      configFile: true,
+      overriden: false
+    })
+  })
 })