"Pick line & replace"

A simple, zero dependency, recursive, single-line text replacer for NodeJS >= 8.

Use to update a specific, single line of text across multiple file types in a project. Finds just the first matching line in a file, and runs a text replacement on just that one line. Synchronous processing.

You might be reading this because you're in a pickle where you have to change a line across a big project. No worries, picklr allows you to test behavior prior to any updates with actions echo and audit. It's good to see what would happen prior to any file being updated, and also what files will get omitted from the change set.

Picklr exports a single function that starts synchronous file processing when invoked.

function (startDir, options)

A brief description of the options that control file selection and processing:

• action - {String} echo|audit|update The action taken on each file. Defaults to echo. Use echo and audit actions to test the results of picklr with options prior to running update.
  • echo - Just output what files could be affected by a change. Tests includeExts and excludeDirsRe options.
  • audit - Must use with targetText and replacementText. Outputs lines found and the change plus any files that would be omitted. Tests includeExts, excludeDirsRe, targetText and replacementText options.
  • update - Does the actual update on the files in place. Use only if you have version control.
• includeExts - {Array} File extensions used to include files in processing. Must include the dot.
• excludeDirsRe - {RegExp} A regular expression used to exclude directories from processing. A match is an exclusion.
• targetText - {String} The string used to identify the line to process.
• replacementText - {String} The string used to replace the targetText.
• logger - {Function} A log function to receive output. Defaults to console.log.

// Example use for a copyright banner text update:
const picklr = require('picklr');

// Output what files WOULD be affected by includes/excludes:
picklr('.', {
  action: 'echo',
  includeExts: ['.js', '.jsx', '.scss'],
  excludeDirsRe: /\/\.|node_modules|dist|tmp|reports/i
});

// Output what WOULD be processed using targetText/replacementText:
picklr('.', {
  action: 'audit',
  targetText: 'Copyright (c) 2015',
  replacementText: 'Copyright (c) 2015, 2016',
  includeExts: ['.js', '.jsx', '.scss'],
  excludeDirsRe: /\/\.|node_modules|dist|tmp|reports/i
});

// Got it. Now, actually perform the pick line and replacement.
picklr('.', {
  action: 'update',
  targetText: 'Copyright (c) 2015',
  replacementText: 'Copyright (c) 2015, 2016',
  includeExts: ['.js', '.jsx', '.scss'],
  excludeDirsRe: /\/\.|node_modules|dist|tmp|reports/i
});

To see only what files would be omitted, set your picklr script to use action 'audit', then grep the output for 'Omitted'.

// myPicklrScript.js

const picklr = require('picklr');
picklr('.', {
  action: 'audit',
  targetText: 'Copyright (c) 2015',
  replacementText: 'Copyright (c) 2015, 2016',
  includeExts: ['.js', '.jsx', '.scss'],
  excludeDirsRe: /\/\.|node_modules|dist|tmp|reports/i
});

node myPicklrScript.js | grep 'Omitted'

MIT