do-if-exists

CLI command for running a command only if at least one file exists.

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CLI

Usage

do-if-exists glob [if-exists-command] [else-command] [-v]

If you include -v, it will output the list of files it finds (if any) and which condition it needs. This can be useful for debugging the command.

Exits with 255 if there was a problem, otherwise exits with the code of the command run.

Example

do-if-exists src/**/*.js "echo JS files exist"
do-if-exists src/**/*.js "echo JS files exist" "echo No JS files"

API

The function is also available for use via JavaScript:

import doIfExists from 'do-if-exists';

doIfExists(pattern, command, elseCommand, verbose)
  .then(({ files, exists }) => console.log(exists));

Parameters

• pattern - string - The glob string
• command - string - The command string
• elseCommand - string - Optional. The else command string. Default: null
• verbose - boolean - Optional. Whether to output verbosely. Default: false

Return

A Promise which will resolve with an object containing:

• files - The list of files found,
• exists - If any files exist (same as !!files.length)
• exitCode - The exit code of the command (or 0 if none was run).