sfdx force:lightning:lint --exit does not return exit code 1 on failure

[jamesmelville]

Summary

We use sfdx force:lightning:lint as part of our CI process, and it is designed to fail if any components fail linting. Since a few weeks (earliest example under sfdx-cli/7.37.1 linux-x64 node-v13.5.0) the linting has been failing but the exit code has remained 0.

Steps To Reproduce:

Create an aura component which fails sfdx force:lightning:lint. E.g. a controller which uses a fat arrow function.

sfdx force:lightning:lint . --exit --json
{
    "name": "LintError",
    "exitCode": 1,
    "data": "<removed>"
}
echo Exit Code is %errorlevel%
Exit Code is 0

Expected result

Command exits with exit code 1

Actual result

Command exits with exit code 0

Additional information

SFDX CLI Version(to find the version of the CLI engine run sfdx --version):
sfdx-cli/7.43.1 linux-x64 node-v13.7.0

SFDX plugin Version(to find the version of the CLI plugin run sfdx plugins --core)
@oclif/plugin-autocomplete 0.1.5 (core)
@oclif/plugin-commands 1.2.3 (core)
@oclif/plugin-help 2.2.3 (core)
@oclif/plugin-not-found 1.2.3 (core)
@oclif/plugin-plugins 1.7.9 (core)
@oclif/plugin-update 1.3.9 (core)
@oclif/plugin-warn-if-update-available 1.7.0 (core)
@oclif/plugin-which 1.0.3 (core)
@salesforce/sfdx-trust 3.0.7 (core)
analytics 1.4.1 (core)
generator 1.1.2 (core)
salesforcedx 47.16.0 (core)
├─ salesforcedx-templates 47.17.0 (core)
└─ salesforce-alm 47.15.0 (core)

sfdx-cli 7.43.1 (core)
OS and version:
Docker Engine Version: 18.09.6
Kernel Version: Linux 2fe3cb7ec042 4.15.0-1052-aws #54-Ubuntu SMP Tue Oct 1 15:43:26 UTC 2019 x86_64 Linux

[clairebianchi]

@ntotten can you take a look at this issue?

[clairebianchi]

I have passed this issue onto the team that owns the lightning:lint command

[cristiand391]

closing this since the force:lightning:lint command no longer exists.