Dvc.org: add command for formatting a single file

[algomaster99]

It will be good if the guide mentions a way to format specified files only. This can be done in two ways:

• npx --write <pattern to match required files>: npx is a package which comes with npm. It simply executes node packages if found in ./node_modules. If this doesn't work you may install it using sudo npm install -g npx otherwise follow the other method.

• ./node_modules/prettier/bin-prettier.js --write <pattern to match required files>: This command runs prettier installed in the node_modules.

pattern to match required files examples:

• src/Diagram/index.js
• static/docs/command-reference/add.md
• static/docs/**/*.md

[jorgeorpinel]

I guess this info would go in the contributing documentation guide. I vote for npx.

p.s. I often git add my changes and then use git diff --staged --name-only | xargs npx prettier --write to lint only the staged files. But that shouldn't be necessary anymore now that we have automatic pretty-quick (kudos @algomaster99 in #386)

[shcheklein]

We have added a mention already how to run it for a single Markdown file. Do we need anything else here? Add a command for JS?

[algomaster99]

@shcheklein It's the same. You just need to write js files in <files> instead of md files.

[shcheklein]

ok, closing it then. Feel free to reopen it if you feel we are missing something here.