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minify.js
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minify.js
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var fs = require("fs"),
path = require("path"),
zlib = require("zlib"),
params = get_params(),
text_output = "",
stats = {};
const rollup = require("./rollup");
function get_params(argv)
{
var i,
params = {};
argv = argv || process.argv;
for (i = process.argv.length - 1; i >= 2; i -= 1) {
params[process.argv[i].replace(/^-+/, "")] = 1;
}
return params;
}
function log(str)
{
text_output += str + "\n";
console.log(str);
}
function filesize(path, cb)
{
return fs.statSync(path).size;
}
function get_kb(bytes)
{
return (bytes / 1024).toFixed(bytes < 1024 ? 2 : 1) + " KB";
}
function pad(str, len)
{
return str.length >= len ? str : new Array(len - str.length + 1).join(" ") + str;
}
function replace_data(str, filename)
{
return str.replace(new RegExp("(" + filename + ".js\\s*\\|\\s*\\S+\\s*\\|)([^|]+)\\|([^|]+)"), function replace(all, base, min, gzip)
{
var new_min = pad(get_kb(stats[filename].min) + " ", min.length),
new_gzip = pad(get_kb(stats[filename].gzip) + " ", gzip.length);
return base + new_min + "|" + new_gzip;
});
}
function update_readme()
{
var data,
readme_path = path.join(__dirname, "readme.md");
data = fs.readFileSync(readme_path, "utf8");
data = replace_data(data, "lzma_worker");
data = replace_data(data, "lzma-c");
data = replace_data(data, "lzma-d");
fs.writeFileSync(readme_path, data);
}
function staged_files_found(cb)
{
require("child_process").exec("git diff-index --quiet --cached HEAD", function onexec(err)
{
if (err) {
if (err.code === 1) {
return cb(true);
}
throw err;
}
cb(false);
});
}
function commit(cb)
{
var execFile = require("child_process").execFile;
function ret()
{
if (cb) {
cb();
}
}
execFile("git", ["add", "readme.md"], function onexec(err)
{
if (err) {
throw err;
}
execFile("git", ["add", "src"], function onexec(err)
{
if (err) {
throw err;
}
staged_files_found(function oncheck(found)
{
if (!found) {
console.log("No files need updating.");
return ret();
}
execFile("git", ["commit", "-m", "Minified:\n\n" + text_output.trim()], function onexec(err)
{
if (err) {
throw err;
}
ret();
});
});
});
});
}
function calculate_size()
{
["lzma", "lzma_worker", "lzma-c", "lzma-d"].forEach(function (file) {
const full_path = path.join(__dirname, "src", file + ".js");
const min_path = path.join(__dirname, "src", file + "-min.js");
const orig_size = filesize(full_path);
log(file + ".js");
stats[file] = {};
const min_size = filesize(min_path);
stats[file].min = min_size;
log("Original size: " + orig_size + " bytes (" + get_kb(orig_size) + ")");
log("Minified size: " + min_size + " bytes (" + get_kb(min_size) + ")");
log("Compression: " + (orig_size / min_size).toFixed(4) + " x smaller");
const buffer = zlib.gzipSync(fs.readFileSync(path.join(__dirname, "src", file + "-min.js")));
const gzmin_size = buffer.length;
stats[file].gzip = gzmin_size;
///NOTE: We could write the file if we wanted to like this: fs.writeFileSync(p.join(__dirname, "src", p.basename(file, ext) + "-min" + ext + ".gz"), buffer);
log("Gzipped size: " + gzmin_size + " bytes (" + get_kb(gzmin_size) + ")");
log("Gzipped ratio: " + (orig_size / gzmin_size).toFixed(4) + " x smaller");
log("");
});
if (params.save) {
console.log("Updating Readme");
update_readme();
console.log("Committing");
commit();
}
}
if (params.help) {
console.log("");
console.log("Usage: node minify.js [FLAGS]");
console.log("");
console.log(" --save Update readme.md and commit.");
console.log("");
process.exit();
}
if (params.save) {
staged_files_found(function oncheck(found)
{
if (found) {
console.log("Found staged files. Commit first.");
process.exit(1);
}
rollup.minify().then(function () {
calculate_size();
});
});
} else {
rollup.minify().then(function () {
calculate_size();
});
}