Prevent errors when pattern doesn't match any files

[rienheuver]

Environments:

• Prettier Version: 1.19.1
• Running Prettier via: CLI
• Runtime: node 14.1.0
• Operating System: Ubuntu 20.04

Steps to reproduce:

prettier ".unknown"

Expected behavior:
Have a flag in the prettier CLI just like --no-error-on-unmatched-pattern like ESLint. So that if we run the CLI on a bunch of projects in our monorepo, it will skip those that have no relevant files (such as assets with only image files). Instead of breaking on those projects and killing the CI.

Actual behavior:
No such flag is currently present in the Prettier CLI, meaning we have to build a hack to circumvent this error.

[alexander-akait]

Duplicate of #8136

[AlicanC]

@evilebottnawi I don't think this is a #8136 duplicate. This is about having a pattern like src/*.js and Prettier not throwing an error if there are no files that end with ".js" in "src".

[alexander-akait]

Oh yes, sorry, my mistake

[NickdeK]

Just a quick workaround for some who run into this issue when running something like
npx prettier --write '**/*.{js,ts,jsx,tsx,md}' and get a No files matching the pattern were found for one of the file types. I'm using the following to work around this issue: npx prettier --write '**/(*.js|.ts|.jsx|.tsx|.md)'

[alvis]

@NickdeK Thx. The workaround is kind of working, as long as you have at least one file matching the expression. 👍