Fix https://github.com/nestjs/nest-cli/issues/1995

[hkjeffchan]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?
Bug fix

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

What is the current behavior?

webpack cache is not created using nest build if cache is set in webpack.config.js

Issue Number: 1995

What is the new behavior?

webpack cache is created using nest build if cache is set in webpack.config.js

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[hkjeffchan]

Updated the PR.

[kamilmysliwiec]

Why can't we move this up - above the process.exit()?

[hkjeffchan]

it won't run... we need to move inside "!err && !stats.hasErrors()"

[hkjeffchan]

or just leave it here at line 143

[hkjeffchan]

      if (!err && !stats!.hasErrors()) {
        if (!onSuccess) {
          assetsManager.closeWatchers();
        } else {
          onSuccess();
        }
      } else if (!watchMode && !watch) {
        console.log(statsOutput);
        return process.exit(1);
      }
      console.log(statsOutput);
      if (!watchMode && !watch) {
        compiler.close(() => {});
      }

or

      if (!err && !stats!.hasErrors()) {
        if (!onSuccess) {
          assetsManager.closeWatchers();
        } else {
          onSuccess();
        }
        if (!watchMode && !watch) {
          compiler.close(() => {});
        }
      } else if (!watchMode && !watch) {
        console.log(statsOutput);
        return process.exit(1);
      }

[hkjeffchan]

@kamilmysliwiec

[hkjeffchan]

@kamilmysliwiec Would you check if you can merge this now?