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file.js
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file.js
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const convertSourceMap = require("convert-source-map");
const sourceMap = require("source-map");
const slash = require("slash");
const path = require("path");
const util = require("./util");
const fs = require("fs");
const _ = require("lodash");
module.exports = function (commander, filenames, opts) {
if (commander.sourceMaps === "inline") {
opts.sourceMaps = true;
}
let results = [];
const buildResult = function () {
const map = new sourceMap.SourceMapGenerator({
file: path.basename(commander.outFile || "") || "stdout",
sourceRoot: opts.sourceRoot
});
let code = "";
let offset = 0;
_.each(results, function (result) {
code += result.code + "\n";
if (result.map) {
const consumer = new sourceMap.SourceMapConsumer(result.map);
const sources = new Set();
consumer.eachMapping(function (mapping) {
if (mapping.source != null) sources.add(mapping.source);
map.addMapping({
generated: {
line: mapping.generatedLine + offset,
column: mapping.generatedColumn,
},
source: mapping.source,
original: mapping.source == null ? null : {
line: mapping.originalLine,
column: mapping.originalColumn,
},
});
});
sources.forEach((source) => {
const content = consumer.sourceContentFor(source, true);
if (content !== null) {
map.setSourceContent(source, content);
}
});
offset = code.split("\n").length;
}
});
// add the inline sourcemap comment if we've either explicitly asked for inline source
// maps, or we've requested them without any output file
if (commander.sourceMaps === "inline" || (!commander.outFile && commander.sourceMaps)) {
code += "\n" + convertSourceMap.fromObject(map).toComment();
}
return {
map: map,
code: code
};
};
const output = function () {
const result = buildResult();
if (commander.outFile) {
// we've requested for a sourcemap to be written to disk
if (commander.sourceMaps && commander.sourceMaps !== "inline") {
const mapLoc = commander.outFile + ".map";
result.code = util.addSourceMappingUrl(result.code, mapLoc);
fs.writeFileSync(mapLoc, JSON.stringify(result.map));
}
fs.writeFileSync(commander.outFile, result.code);
} else {
process.stdout.write(result.code + "\n");
}
};
const stdin = function () {
let code = "";
process.stdin.setEncoding("utf8");
process.stdin.on("readable", function () {
const chunk = process.stdin.read();
if (chunk !== null) code += chunk;
});
process.stdin.on("end", function () {
results.push(util.transform(commander.filename, code, {
sourceFileName: "stdin",
}));
output();
});
};
const walk = function () {
const _filenames = [];
results = [];
_.each(filenames, function (filename) {
if (!fs.existsSync(filename)) return;
const stat = fs.statSync(filename);
if (stat.isDirectory()) {
const dirname = filename;
_.each(util.readdirFilter(filename), function (filename) {
_filenames.push(path.join(dirname, filename));
});
} else {
_filenames.push(filename);
}
});
_.each(_filenames, function (filename) {
if (util.shouldIgnore(filename)) return;
let sourceFilename = filename;
if (commander.outFile) {
sourceFilename = path.relative(path.dirname(commander.outFile), sourceFilename);
}
sourceFilename = slash(sourceFilename);
const data = util.compile(filename, {
sourceFileName: sourceFilename,
});
if (data.ignored) return;
results.push(data);
});
output();
};
const files = function () {
if (!commander.skipInitialBuild) {
walk();
}
if (commander.watch) {
const chokidar = util.requireChokidar();
chokidar.watch(filenames, {
persistent: true,
ignoreInitial: true
}).on("all", function (type, filename) {
if (util.shouldIgnore(filename) || !util.canCompile(filename, commander.extensions)) return;
if (type === "add" || type === "change") {
util.log(type + " " + filename);
try {
walk();
} catch (err) {
console.error(err.stack);
}
}
});
}
};
if (filenames.length) {
files();
} else {
stdin();
}
};