From 21cd2dda44714b0191601fbd9db25532560b0e6c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=89=E5=92=B2=E6=99=BA=E5=AD=90=20Kevin=20Deng?=
 <sxzz@sxzz.moe>
Date: Mon, 2 Sep 2024 18:04:36 +0800
Subject: [PATCH] feat: add dependency kind

---
 README.md           |  7 +++++++
 src/core/options.ts |  5 +++++
 src/index.ts        | 13 ++++++++-----
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 773a669..286fa6d 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,14 @@ Unused({
   include: [/\.([cm]?[jt]sx?|vue)$/],
   exclude: [/node_modules/],
   level: 'warning', // or 'error'
+  /**
+   * Ignore some dependencies.
+   */
   ignore: ['vue'],
+  /**
+   * Dependency kinds to check.
+   */
+  depKinds: ['dependencies', 'peerDependencies'],
 })
 ```
 
diff --git a/src/core/options.ts b/src/core/options.ts
index 2a0a911..c9538bd 100644
--- a/src/core/options.ts
+++ b/src/core/options.ts
@@ -9,6 +9,10 @@ export interface Options {
    * @default 'warning'
    */
   level?: 'warning' | 'error'
+  /**
+   * @default ['dependencies', 'peerDependencies']
+   */
+  depKinds?: Array<'dependencies' | 'devDependencies' | 'peerDependencies'>
 }
 
 type Overwrite<T, U> = Pick<T, Exclude<keyof T, keyof U>> & U
@@ -24,5 +28,6 @@ export function resolveOptions(options: Options): OptionsResolved {
     exclude: options.exclude || [/node_modules/],
     ignore: options.ignore || [],
     level: options.level || 'warning',
+    depKinds: options.depKinds || ['dependencies', 'peerDependencies'],
   }
 }
diff --git a/src/index.ts b/src/index.ts
index e1eb598..ebddcec 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,11 +24,14 @@ const plugin: UnpluginInstance<Options | undefined, false> = createUnplugin(
         options.root ||= process.cwd()
         pkgPath = path.resolve(await resolvePackageJSON(options.root))
         const pkg = await readPackageJSON(pkgPath)
-        const dependencies = Object.keys(pkg.dependencies || {})
-        for (const dep of dependencies) {
-          if (options.ignore.includes(dep)) continue
-          deps.add(dep)
-          depsRegex[dep] = new RegExp(`["']${escapeStringRegexp(dep)}['"\\/]`)
+
+        for (const kind of options.depKinds) {
+          const dependencies = Object.keys(pkg[kind] || {})
+          for (const dep of dependencies) {
+            if (options.ignore.includes(dep) || deps.has(dep)) continue
+            deps.add(dep)
+            depsRegex[dep] = new RegExp(`["']${escapeStringRegexp(dep)}['"\\/]`)
+          }
         }
       },