yarnpkg - Set NPM log level to "quiet" in script definition

Question

I have a simple CLI tool for my project which I run through NPM/Yarn scripts:

  "scripts": {
    "cli": "dotenv ts-node -r tsconfig-paths/register src/cli/index.ts --",
    ...
}

I'd like to silence the log info stuff that NPM/Yarn automatically write to stdout when a script is run.

By default, the output is:

$~/foo> yarn cli --help
yarn run v1.22.5
$ dotenv ts-node -r tsconfig-paths/register src/cli/index.ts -- --help
cli <command>

Foo bar baz bat

Options:
  --help  Show help                                                    [boolean]
?  Done in 2.42s.

I want to get rid of the part where it writes out the command itself, and the "Done in xs" part.

I know I can do it manually with yarn --silent cli or npm run --quiet cli, or I could set loglevel=quiet in an npmrc, but neither is preferable.

I don't want to use the npmrc as I want to retail output for other scripts, and I don't want to require users to run it with the --silent flag themselves.

The CLI tool generates JSON which is fed into other scripts, so it's ideal if it's clean output that can be redirected or piped without the NPM/Yarn guff.

I tried adding --silent to the start of the command, but that doesn't work. I tried setting npm_config_loglevel=quiet as an env var, but that doesn't work.

Is there anything else I can try, or is this just not supported?

question from:https://stackoverflow.com/questions/66062547/set-npm-log-level-to-quiet-in-script-definition

Answer 1

when calling npm run script you will always get such output by default and there is no way (currently) to disable it.

if you don't want npm output, just call your script directly without using npm.

e.g. rather than executing npm run cli, then execute npx dotenv ts-node -r tsconfig-paths/register src/cli/index.ts --