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    // generate.js #!/usr/bin/node const commandLineArgs = require('command-line-args') const commandLineUsage = require('command-line-usage') const version = require('./package.json').version const optionDefinitions = [ { name: 'width', alias: 'w', type: Number, defaultValue: 640, description: 'Width of the image. Default: 640' }, { name: 'height', alias: 'h', type: Number, defaultValue: 480, description: 'Height of the image. Default: 480' }, { name: 'red', alias: 'r', type: Number, defaultValue: 255, description: 'Red part, 0-255. Default: 255' }, { name: 'green', alias: 'g', type: Number, defaultValue: 255, description: 'Green part, 0-255. Default: 255' }, { name: 'blue', alias: 'b', type: Number, defaultValue: 255, description: 'Blue part, 0-255. Default: 255' }, { name: 'text', alias: 't', type: String, defaultValue: 'Lorem ipsum', description: 'Text to put on image. Default: "Lorem ipsum"' }, { name: 'font', alias: 'f', type: String, defaultValue: 'sans-serif', description: 'Font the text will be rendered in. Default: "sans-serif"' }, { name: 'output', alias: 'o', type: String, defaultValue: './image.png', description: 'Path of the image. Default: "./image.png"' }, { name: 'help', type: Boolean, defaultValue: false, description: 'Prints this help' }, { name: 'version', alias: 'v', type: Boolean, defaultValue: false, description: 'Prints the version' }, ] const options = commandLineArgs(optionDefinitions) if (options.version) { console.log(version) return } if (options.help) { const sections = [ { header: 'Placeholder image generator', content: 'Create placeholder images with a single line of bash!' }, { header: 'Arguments', optionList: optionDefinitions }, { header: 'Example', content: './generate.js -w 100 -h 100 -r 0 -g 0 -b 255 -t "Hello, World!" -f Helvetica -o ./placeholder.png' } ] const usage = commandLineUsage(sections) console.log(usage) return }