fix: close over envs

src/env.ts

@@ -1,27 +1,29 @@
 import * as _ from 'lodash'
 
-import {Env, EnvOptions} from './types'
+import {EnvOptions} from './types'
 
-export default (env: {[k: string]: string | null | undefined}, opts: EnvOptions = {}) => ({
-  run(ctx) {
-    // normalize to undefined
-    const normalizedEnv = _.mapValues(env, v => v === null ? undefined : v)
+export default (env: {[k: string]: string | null | undefined}, opts: EnvOptions = {}) => {
+  const envs: (typeof process.env)[] = []
+  return {
+    run() {
+      // normalize to undefined
+      const normalizedEnv = _.mapValues(env, v => v === null ? undefined : v)
 
-    // store previous env for finally
-    ctx.envs = ctx.envs || []
-    ctx.envs.push(process.env)
+      // store previous env for finally
+      envs.push(process.env)
 
-    if (opts.clear) {
-      process.env = {...normalizedEnv}
-    } else {
-      process.env = {...process.env, ...normalizedEnv}
-      Object.entries(normalizedEnv)
-      .filter(([, v]) => v === undefined)
-      .forEach(([k]) => { delete process.env[k] })
-    }
-  },
-  finally(ctx) {
-    const env = ctx.envs.pop()
-    if (env) process.env = env
-  },
-}) as Env
+      if (opts.clear) {
+        process.env = {...normalizedEnv}
+      } else {
+        process.env = {...process.env, ...normalizedEnv}
+        Object.entries(normalizedEnv)
+        .filter(([, v]) => v === undefined)
+        .forEach(([k]) => { delete process.env[k] })
+      }
+    },
+    finally() {
+      const env = envs.pop()
+      if (env) process.env = env
+    },
+  }
+}

src/types.ts

@@ -47,6 +47,4 @@ export interface EnvOptions {
   clear?: boolean
 }
 
-export interface Env extends Plugin<{envs: (typeof process.env)[]}> {}
-
 export type MochaDone = (error?: any) => any