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coa.js
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coa.js
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'use strict';
const FS = require('fs');
const PATH = require('path');
const { green } = require('colorette');
const { loadConfig, optimize } = require('../svgo-node.js');
const pluginsMap = require('../../plugins/plugins.js');
const PKG = require('../../package.json');
const { encodeSVGDatauri, decodeSVGDatauri } = require('./tools.js');
const regSVGFile = /\.svg$/i;
/**
* Synchronously check if path is a directory. Tolerant to errors like ENOENT.
* @param {string} path
*/
function checkIsDir(path) {
try {
return FS.lstatSync(path).isDirectory();
} catch (e) {
return false;
}
}
module.exports = function makeProgram(program) {
program
.name(PKG.name)
.description(PKG.description, {
INPUT: 'Alias to --input',
})
.version(PKG.version, '-v, --version')
.arguments('[INPUT...]')
.option('-i, --input <INPUT...>', 'Input files, "-" for STDIN')
.option('-s, --string <STRING>', 'Input SVG data string')
.option(
'-f, --folder <FOLDER>',
'Input folder, optimize and rewrite all *.svg files'
)
.option(
'-o, --output <OUTPUT...>',
'Output file or folder (by default the same as the input), "-" for STDOUT'
)
.option(
'-p, --precision <INTEGER>',
'Set number of digits in the fractional part, overrides plugins params'
)
.option('--config <CONFIG>', 'Custom config file, only .js is supported')
.option(
'--datauri <FORMAT>',
'Output as Data URI string (base64), URI encoded (enc) or unencoded (unenc)'
)
.option(
'--multipass',
'Pass over SVGs multiple times to ensure all optimizations are applied'
)
.option('--pretty', 'Make SVG pretty printed')
.option('--indent <INTEGER>', 'Indent number when pretty printing SVGs')
.option(
'--eol <EOL>',
'Line break to use when outputting SVG: lf, crlf. If unspecified, uses platform default.'
)
.option('--final-newline', 'Ensure SVG ends with a line break')
.option(
'-r, --recursive',
"Use with '--folder'. Optimizes *.svg files in folders recursively."
)
.option(
'--exclude <PATTERN...>',
"Use with '--folder'. Exclude files matching regular expression pattern."
)
.option(
'-q, --quiet',
'Only output error messages, not regular status messages'
)
.option('--show-plugins', 'Show available plugins and exit')
.action(action);
};
async function action(args, opts, command) {
var input = opts.input || args;
var output = opts.output;
var config = {};
if (opts.precision != null) {
const number = Number.parseInt(opts.precision, 10);
if (Number.isNaN(number)) {
console.error(
"error: option '-p, --precision' argument must be an integer number"
);
process.exit(1);
} else {
opts.precision = number;
}
}
if (opts.datauri != null) {
if (
opts.datauri !== 'base64' &&
opts.datauri !== 'enc' &&
opts.datauri !== 'unenc'
) {
console.error(
"error: option '--datauri' must have one of the following values: 'base64', 'enc' or 'unenc'"
);
process.exit(1);
}
}
if (opts.indent != null) {
const number = Number.parseInt(opts.indent, 10);
if (Number.isNaN(number)) {
console.error(
"error: option '--indent' argument must be an integer number"
);
process.exit(1);
} else {
opts.indent = number;
}
}
if (opts.eol != null) {
if (opts.eol !== 'lf' && opts.eol !== 'crlf') {
console.error(
"error: option '--eol' must have one of the following values: 'lf' or 'crlf'"
);
process.exit(1);
}
}
// --show-plugins
if (opts.showPlugins) {
showAvailablePlugins();
return;
}
// w/o anything
if (
(input.length === 0 || input[0] === '-') &&
!opts.string &&
!opts.stdin &&
!opts.folder &&
process.stdin.isTTY === true
) {
return command.help();
}
if (
typeof process == 'object' &&
process.versions &&
process.versions.node &&
PKG &&
PKG.engines.node
) {
var nodeVersion = String(PKG.engines.node).match(/\d*(\.\d+)*/)[0];
if (parseFloat(process.versions.node) < parseFloat(nodeVersion)) {
throw Error(
`${PKG.name} requires Node.js version ${nodeVersion} or higher.`
);
}
}
// --config
const loadedConfig = await loadConfig(opts.config);
if (loadedConfig != null) {
config = loadedConfig;
}
// --quiet
if (opts.quiet) {
config.quiet = opts.quiet;
}
// --recursive
if (opts.recursive) {
config.recursive = opts.recursive;
}
// --exclude
config.exclude = opts.exclude
? opts.exclude.map((pattern) => RegExp(pattern))
: [];
// --precision
if (opts.precision != null) {
var precision = Math.min(Math.max(0, opts.precision), 20);
config.floatPrecision = precision;
}
// --multipass
if (opts.multipass) {
config.multipass = true;
}
// --pretty
if (opts.pretty) {
config.js2svg = config.js2svg || {};
config.js2svg.pretty = true;
if (opts.indent != null) {
config.js2svg.indent = opts.indent;
}
}
// --eol
if (opts.eol) {
config.js2svg = config.js2svg || {};
config.js2svg.eol = opts.eol;
}
// --final-newline
if (opts.finalNewline) {
config.js2svg = config.js2svg || {};
config.js2svg.finalNewline = true;
}
// --output
if (output) {
if (input.length && input[0] != '-') {
if (output.length == 1 && checkIsDir(output[0])) {
var dir = output[0];
for (var i = 0; i < input.length; i++) {
output[i] = checkIsDir(input[i])
? input[i]
: PATH.resolve(dir, PATH.basename(input[i]));
}
} else if (output.length < input.length) {
output = output.concat(input.slice(output.length));
}
}
} else if (input.length) {
output = input;
} else if (opts.string) {
output = '-';
}
if (opts.datauri) {
config.datauri = opts.datauri;
}
// --folder
if (opts.folder) {
var ouputFolder = (output && output[0]) || opts.folder;
await optimizeFolder(config, opts.folder, ouputFolder);
}
// --input
if (input.length !== 0) {
// STDIN
if (input[0] === '-') {
return new Promise((resolve, reject) => {
var data = '',
file = output[0];
process.stdin
.on('data', (chunk) => (data += chunk))
.once('end', () =>
processSVGData(config, { input: 'string' }, data, file).then(
resolve,
reject
)
);
});
// file
} else {
await Promise.all(
input.map((file, n) => optimizeFile(config, file, output[n]))
);
}
// --string
} else if (opts.string) {
var data = decodeSVGDatauri(opts.string);
return processSVGData(config, { input: 'string' }, data, output[0]);
}
}
/**
* Optimize SVG files in a directory.
* @param {Object} config options
* @param {string} dir input directory
* @param {string} output output directory
* @return {Promise}
*/
function optimizeFolder(config, dir, output) {
if (!config.quiet) {
console.log(`Processing directory '${dir}':\n`);
}
return FS.promises
.readdir(dir)
.then((files) => processDirectory(config, dir, files, output));
}
/**
* Process given files, take only SVG.
* @param {Object} config options
* @param {string} dir input directory
* @param {Array} files list of file names in the directory
* @param {string} output output directory
* @return {Promise}
*/
function processDirectory(config, dir, files, output) {
// take only *.svg files, recursively if necessary
var svgFilesDescriptions = getFilesDescriptions(config, dir, files, output);
return svgFilesDescriptions.length
? Promise.all(
svgFilesDescriptions.map((fileDescription) =>
optimizeFile(
config,
fileDescription.inputPath,
fileDescription.outputPath
)
)
)
: Promise.reject(
new Error(`No SVG files have been found in '${dir}' directory.`)
);
}
/**
* Get svg files descriptions
* @param {Object} config options
* @param {string} dir input directory
* @param {Array} files list of file names in the directory
* @param {string} output output directory
* @return {Array}
*/
function getFilesDescriptions(config, dir, files, output) {
const filesInThisFolder = files
.filter(
(name) =>
regSVGFile.test(name) &&
!config.exclude.some((regExclude) => regExclude.test(name))
)
.map((name) => ({
inputPath: PATH.resolve(dir, name),
outputPath: PATH.resolve(output, name),
}));
return config.recursive
? [].concat(
filesInThisFolder,
files
.filter((name) => checkIsDir(PATH.resolve(dir, name)))
.map((subFolderName) => {
const subFolderPath = PATH.resolve(dir, subFolderName);
const subFolderFiles = FS.readdirSync(subFolderPath);
const subFolderOutput = PATH.resolve(output, subFolderName);
return getFilesDescriptions(
config,
subFolderPath,
subFolderFiles,
subFolderOutput
);
})
.reduce((a, b) => [].concat(a, b), [])
)
: filesInThisFolder;
}
/**
* Read SVG file and pass to processing.
* @param {Object} config options
* @param {string} file
* @param {string} output
* @return {Promise}
*/
function optimizeFile(config, file, output) {
return FS.promises.readFile(file, 'utf8').then(
(data) =>
processSVGData(config, { input: 'file', path: file }, data, output, file),
(error) => checkOptimizeFileError(config, file, output, error)
);
}
/**
* Optimize SVG data.
* @param {Object} config options
* @param {string} data SVG content to optimize
* @param {string} output where to write optimized file
* @param {string} [input] input file name (being used if output is a directory)
* @return {Promise}
*/
function processSVGData(config, info, data, output, input) {
var startTime = Date.now(),
prevFileSize = Buffer.byteLength(data, 'utf8');
const result = optimize(data, { ...config, ...info });
if (result.error) {
let message = result.error;
if (result.path != null) {
message += `\nFile: ${result.path}`;
}
throw Error(message);
}
if (config.datauri) {
result.data = encodeSVGDatauri(result.data, config.datauri);
}
var resultFileSize = Buffer.byteLength(result.data, 'utf8'),
processingTime = Date.now() - startTime;
return writeOutput(input, output, result.data).then(
function () {
if (!config.quiet && output != '-') {
if (input) {
console.log(`\n${PATH.basename(input)}:`);
}
printTimeInfo(processingTime);
printProfitInfo(prevFileSize, resultFileSize);
}
},
(error) =>
Promise.reject(
new Error(
error.code === 'ENOTDIR'
? `Error: output '${output}' is not a directory.`
: error
)
)
);
}
/**
* Write result of an optimization.
* @param {string} input
* @param {string} output output file name. '-' for stdout
* @param {string} data data to write
* @return {Promise}
*/
function writeOutput(input, output, data) {
if (output == '-') {
console.log(data);
return Promise.resolve();
}
FS.mkdirSync(PATH.dirname(output), { recursive: true });
return FS.promises
.writeFile(output, data, 'utf8')
.catch((error) => checkWriteFileError(input, output, data, error));
}
/**
* Write a time taken by optimization.
* @param {number} time time in milliseconds.
*/
function printTimeInfo(time) {
console.log(`Done in ${time} ms!`);
}
/**
* Write optimizing information in human readable format.
* @param {number} inBytes size before optimization.
* @param {number} outBytes size after optimization.
*/
function printProfitInfo(inBytes, outBytes) {
var profitPercents = 100 - (outBytes * 100) / inBytes;
console.log(
Math.round((inBytes / 1024) * 1000) / 1000 +
' KiB' +
(profitPercents < 0 ? ' + ' : ' - ') +
green(Math.abs(Math.round(profitPercents * 10) / 10) + '%') +
' = ' +
Math.round((outBytes / 1024) * 1000) / 1000 +
' KiB'
);
}
/**
* Check for errors, if it's a dir optimize the dir.
* @param {Object} config
* @param {string} input
* @param {string} output
* @param {Error} error
* @return {Promise}
*/
function checkOptimizeFileError(config, input, output, error) {
if (error.code == 'EISDIR') {
return optimizeFolder(config, input, output);
} else if (error.code == 'ENOENT') {
return Promise.reject(
new Error(`Error: no such file or directory '${error.path}'.`)
);
}
return Promise.reject(error);
}
/**
* Check for saving file error. If the output is a dir, then write file there.
* @param {string} input
* @param {string} output
* @param {string} data
* @param {Error} error
* @return {Promise}
*/
function checkWriteFileError(input, output, data, error) {
if (error.code == 'EISDIR' && input) {
return FS.promises.writeFile(
PATH.resolve(output, PATH.basename(input)),
data,
'utf8'
);
} else {
return Promise.reject(error);
}
}
/**
* Show list of available plugins with short description.
*/
function showAvailablePlugins() {
const list = Object.entries(pluginsMap)
.sort(([a], [b]) => a.localeCompare(b))
.map(([name, plugin]) => ` [ ${green(name)} ] ${plugin.description}`)
.join('\n');
console.log('Currently available plugins:\n' + list);
}
module.exports.checkIsDir = checkIsDir;