replace-in-files-cli

> Replace matching strings and regexes in files

Install

``sh
npm install --global replace-in-files-cli
`

Usage

`
$ replace-in-files --help

Usage
$ replace-in-files

Options
--regex Regex pattern to find (Can be set multiple times)
--string String to find (Can be set multiple times)
--replacement Replacement string (Required)
--ignore-case Search case-insensitively
--no-glob Disable globbing
--dry-run Show what would be replaced without making changes

Examples
$ replace-in-files --string='horse' --regex='unicorn|rainbow' --replacement='🦄' foo.md
$ replace-in-files --regex='v\d+\.\d+\.\d+' --replacement=v$npm_package_version foo.css
$ replace-in-files --string='blob' --replacement='blog' 'some/*/[gb]lob/' '!some/glob/foo'
$ replace-in-files --dry-run --string='old' --replacement='new' file.txt

You can use the same replacement patterns as with String#replace(), like $&.

When working with quotes in shell commands, escape them with backslashes:
$ replace-in-files --string='\"use strict\";' --replacement='\"use strict\";\nrequire(\"module\");' file.js
`

Real-world use-case: Bumping version number in a file when publishing to npm

The regex should be JavaScript flavor.

API

You can also use this package programmatically:

`js
import replaceInFiles from 'replace-in-files-cli';

// Find and replace
await replaceInFiles('*.js', {
find: ['old', /version \d+/],
replacement: 'new'
});

// Transform entire file content
await replaceInFiles('*.js', {
transform: (content, filePath) => / Banner /\n${content}
});

// Combine find/replace with transform (transform runs after find/replace)
await replaceInFiles('*.js', {
find: ['old'],
replacement: 'new',
transform: (content, filePath) => / ${filePath} /\n${content}
});
`

The transform option provides full control over file content:
- Standalone: Use alone for prepend, append, or complex transformations
- Combined: Use with find/replacement - transform runs after find/replace operations
- Parameters: Receives (content, filePath)` for context-aware transformations