feat: find config in parent directory (#8)

Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

package.json

@@ -62,6 +62,7 @@
     "@jsdevtools/ez-spawn": "^3.0.4",
     "c12": "^1.9.0",
     "cac": "^6.7.14",
+    "escalade": "^3.1.2",
     "fast-glob": "^3.3.2",
     "js-yaml": "^4.1.0",
     "prompts": "^2.4.2",

src/config.ts

@@ -1,5 +1,7 @@
 import process from 'node:process'
+import { dirname } from 'node:path'
 import { loadConfig } from 'c12'
+import escalade from 'escalade/sync'
 import type { VersionBumpOptions } from './types/version-bump-options'
 
 export const bumpConfigDefaults: VersionBumpOptions = {
@@ -18,25 +20,51 @@ export async function loadBumpConfig(
   overrides?: Partial<VersionBumpOptions>,
   cwd = process.cwd(),
 ) {
-  const { config: bumppConfig } = await loadConfig<VersionBumpOptions>({
-    name: 'bumpp',
-    overrides: {
-      ...(overrides as VersionBumpOptions),
-    },
-    cwd,
-  })
+  const name = 'bump'
+  const configFile = findConfigFile(name, cwd)
   const { config } = await loadConfig<VersionBumpOptions>({
-    name: 'bump',
+    name,
     defaults: bumpConfigDefaults,
     overrides: {
-      ...(bumppConfig!),
+      ...(overrides as VersionBumpOptions),
     },
-    cwd,
+    cwd: configFile ? dirname(configFile) : cwd,
   })
-
   return config!
 }
 
+function findConfigFile(name: string, cwd: string) {
+  let foundRepositoryRoot = false
+  try {
+    const candidates = ['js', 'mjs', 'ts', 'mts', 'json'].map(ext => `${name}.config.${ext}`)
+    return escalade(cwd, (_dir, files) => {
+      const match = files.find((file) => {
+        if (candidates.includes(file))
+          return true
+        if (file === '.git')
+          foundRepositoryRoot = true
+        return false
+      })
+
+      if (match)
+        return match
+
+      // Stop at the repository root.
+      if (foundRepositoryRoot) {
+        // eslint-disable-next-line no-throw-literal
+        throw null
+      }
+
+      return false
+    })
+  }
+  catch (error) {
+    if (foundRepositoryRoot)
+      return null
+    throw error
+  }
+}
+
 export function defineConfig(config: Partial<VersionBumpOptions>) {
   return config
 }