process.env.CDK_DEFAULT_ACCOUNT and process.env.CDK_DEFAULT_REGION don't work

[hacker65536]

These environments worked before. Didn't need to install @types/node.

Reproduction Steps

new VpcStack(app, "VpcStack", {
  env: {
    account: process.env.CDK_DEFAULT_ACCOUNT,
    region: process.env.CDK_DEFAULT_REGION,
  },
});

Error Log

$ npm run build

> [email protected] build /home/ec2-user/vpc
> tsc

bin/vpc.ts:9:14 - error TS2580: Cannot find name 'process'. Do you need to install type definitions for node? Try `npm i @types/node`.

9     account: process.env.CDK_DEFAULT_ACCOUNT,
               ~~~~~~~

bin/vpc.ts:10:13 - error TS2580: Cannot find name 'process'. Do you need to install type definitions for node? Try `npm i @types/node`.

10     region: process.env.CDK_DEFAULT_REGION,
               ~~~~~~~


Found 2 errors.

npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] build: `tsc`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/ec2-user/.npm/_logs/2019-10-04T07_22_12_135Z-debug.log

Environment

• CLI Version :1.11.0 (build 4ed4d96)
• Framework Version:
• OS :Amazon linux 2
• Language :typescript

Other

---

This is 🐛 Bug Report

[eladb]

We used to include @types/node in "cdk init" but this was removed since it is not required in normal cases (#3840). You should simply npm i -D @types/node if you process.env.

I will make sure we update the relevant documentation topic so this is less surprising.

Also, this behaviour is likely to be changed when we implement #4131

[eladb]

Doc fix: awsdocs/aws-cdk-guide#132

[hacker65536]

Thank you for your explanation.