WIP set extendEnv: false execa option

That results in the value `"null"` instead of undefined

.github/workflows/test.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - master
       - renovate/**
+      - 1692/setup-renovate-debug
 
   pull_request:
     types:
@@ -16,9 +17,9 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - 10
+          # - 10
           - 12
-          - 14
+          # - 14
 
     runs-on: ubuntu-latest
 
@@ -31,7 +32,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - uses: bahmutov/npm-install@v1
-      - run: npm run test:ci
+      - run: npx ava test/integration.test.js
 
   # separate job to set as required in branch protection,
   # as the build names above change each time Node versions change

bin/semantic-release.js

@@ -21,6 +21,13 @@ See https://github.com/semantic-release/semantic-release/blob/master/docs/suppor
   process.exit(1);
 }
 
+console.log("DEBUG START ==========")
+console.log('process.env')
+console.log(process.env)
+console.log('envCi({ env: process.env })')
+console.log(require('env-ci')({ env: process.env }))
+console.log("DEBUG END ==========")
+
 execa('git', ['--version'])
   .then(({stdout}) => {
     var gitVersion = findVersions(stdout)[0];

test/integration.test.js

@@ -1,5 +1,5 @@
 const path = require('path');
-const test = require('ava');
+const { serial: test } = require('ava');
 const proxyquire = require('proxyquire');
 const {escapeRegExp} = require('lodash');
 const {writeJson, readJson} = require('fs-extra');
@@ -29,7 +29,11 @@ const npmRegistry = require('./helpers/npm-registry');
 const requireNoCache = proxyquire.noPreserveCache();
 
 // Environment variables used with semantic-release cli (similar to what a user would setup)
-const {GITHUB_ACTION, GITHUB_TOKEN, ...processEnvWithoutGitHubActionsVariables} = process.env;
+const {
+  GITHUB_ACTION,
+  GITHUB_TOKEN,
+  ...processEnvWithoutGitHubActionsVariables
+} = process.env
 const env = {
   ...processEnvWithoutGitHubActionsVariables,
   ...npmRegistry.authEnv,
@@ -652,12 +656,7 @@ test('Hide sensitive environment variable values from the logs', async (t) => {
   });
 
   t.log('$ semantic-release');
-  const {stdout, stderr} = await execa(cli, [], {
+  const {stdout, stderr} = await execa(cli, [], {env: {...env, MY_TOKEN: 'secret token'}, cwd, reject: false, extendEnv: false});
-    env: {...env, MY_TOKEN: 'secret token'},
-    cwd,
-    reject: false,
-    extendEnv: false,
-  });
 
   t.regex(stdout, new RegExp(`Console: Exposing token ${escapeRegExp(SECRET_REPLACEMENT)}`));
   t.regex(stdout, new RegExp(`Log: Exposing token ${escapeRegExp(SECRET_REPLACEMENT)}`));