How to configure ESlint to fix indent only

Question

I am linting old NodeJS code and I want to clear out all indent issues before I start fixing the rest.

How do I configure ESlint to only show and fix the indent issues only?

Cyclothymia

Answer 1

By using eslint in the command line with the proper options:

node node_modules/eslint/bin/eslint --fix --parser babel-eslint --ext js --no-eslintrc --rule 'indent: [1,4,{SwitchCase: 1}]' src/

Change these options according to your requirements

--fix to auto fix.

--parser babel-eslint the parser from my eslint.rc.

--ext js to lint only js files.

--no-eslintrc otherwise all rules from your eslintrc will be executed.

--rule 'indent: [1,4,{SwitchCase: 1}]' the rule you want to execute (you can copy paste it from your eslint.rc, it has to be single quoted (the double quotes from the original json were removed).

src/ the target folder.

eslint documentation

Loxodromics

For complete noobs like myself : is there an even more basic parser than babel which doesn't require to install an extra package? (i.e. out of the box). I mean, if eslint is able to complain about indentation issues without babel, surely it can fix them too without it? – Cabanatuan

What do you think eslint uses internally :) ?( espree and a lot more....) If you do not need a complete javascript implementation, your lightest solution could be using a parser generator like PEGJS (npmjs.com/package/pegjs) – Loxodromics

Answer 2

If you want to use your normal .eslintrc file to keep your configuration (parser, plugins, rule config, etc), you can use eslint-nibble with the --rule= indent flag. This will respect your normal configuration, but only show you errors from that rule, and give you the option to fix only those, if the rule is auto-fixable.

Disclaimer: I'm the creator of eslint-nibble.

Reata