file-modifier v1.2.1

File Modifier

Example usage

The below code would add a 'use strict' statement to all JS files that are missing it.

const fileModifier = require('file-modifier')

fileModifier({
  directory: 'path/to/project',
  opts: {
    whitelistedExt: ['.js'],
    blacklistedFolders: ['node_modules'],
  },
  modifyFn: contents => {
    if (contents.indexOf('use strict') > -1) {
      // do nothing to contents
      return contents
    }
    
    // otherwise add 'use strict'
    return `'use strict'\n${contents}`
  },
})

Arguments

directory

The directory to recursively search for files under

opts

modifyFn

A function whose argument is the contents of the file to modify.

If the file should not be changed, return the original contents. If the file should be changed, return a string with the new file contents.