atom/src/compile-cache.js at master · buzz/atom · GitHub

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'use strict';

// Atom's compile-cache when installing or updating packages, called by apm's Node-js

const path = require('path');

const fs = require('fs-plus');

const sourceMapSupport = require('@atom/source-map-support');

const PackageTranspilationRegistry = require('./package-transpilation-registry');

let CSON = null;

const packageTranspilationRegistry = new PackageTranspilationRegistry();

const COMPILERS = {

'.js': packageTranspilationRegistry.wrapTranspiler(require('./babel')),

'.ts': packageTranspilationRegistry.wrapTranspiler(require('./typescript')),

'.tsx': packageTranspilationRegistry.wrapTranspiler(require('./typescript')),

'.coffee': packageTranspilationRegistry.wrapTranspiler(

require('./coffee-script')

)

};

exports.addTranspilerConfigForPath = function(

packagePath,

packageName,

packageMeta,

config

) {

packagePath = fs.realpathSync(packagePath);

packageTranspilationRegistry.addTranspilerConfigForPath(

packagePath,

packageName,

packageMeta,

config

);

};

exports.removeTranspilerConfigForPath = function(packagePath) {

packagePath = fs.realpathSync(packagePath);

packageTranspilationRegistry.removeTranspilerConfigForPath(packagePath);

};

const cacheStats = {};

let cacheDirectory = null;

exports.setAtomHomeDirectory = function(atomHome) {

let cacheDir = path.join(atomHome, 'compile-cache');

if (

process.env.USER === 'root' &&

process.env.SUDO_USER &&

process.env.SUDO_USER !== process.env.USER

) {

cacheDir = path.join(cacheDir, 'root');

}

this.setCacheDirectory(cacheDir);

};

exports.setCacheDirectory = function(directory) {

cacheDirectory = directory;

};

exports.getCacheDirectory = function() {

return cacheDirectory;

};

exports.addPathToCache = function(filePath, atomHome) {

this.setAtomHomeDirectory(atomHome);

const extension = path.extname(filePath);

if (extension === '.cson') {

if (!CSON) {

CSON = require('season');

CSON.setCacheDir(this.getCacheDirectory());

}

return CSON.readFileSync(filePath);

} else {

const compiler = COMPILERS[extension];

if (compiler) {

return compileFileAtPath(compiler, filePath, extension);

}

};

exports.getCacheStats = function() {

return cacheStats;

};

exports.resetCacheStats = function() {

Object.keys(COMPILERS).forEach(function(extension) {

cacheStats[extension] = {

misses: 0

};

});

};

function compileFileAtPath(compiler, filePath, extension) {

const sourceCode = fs.readFileSync(filePath, 'utf8');

if (compiler.shouldCompile(sourceCode, filePath)) {

const cachePath = compiler.getCachePath(sourceCode, filePath);

let compiledCode = readCachedJavaScript(cachePath);

if (compiledCode != null) {

cacheStats[extension].hits++;

} else {

cacheStats[extension].misses++;

compiledCode = compiler.compile(sourceCode, filePath);

writeCachedJavaScript(cachePath, compiledCode);

}

return compiledCode;

}

return sourceCode;

}

function readCachedJavaScript(relativeCachePath) {

const cachePath = path.join(cacheDirectory, relativeCachePath);

if (fs.isFileSync(cachePath)) {

try {

return fs.readFileSync(cachePath, 'utf8');

} catch (error) {}

}

return null;

}

function writeCachedJavaScript(relativeCachePath, code) {

const cachePath = path.join(cacheDirectory, relativeCachePath);

fs.writeFileSync(cachePath, code, 'utf8');

}

const INLINE_SOURCE_MAP_REGEXP = /\/\/[#@]\s*sourceMappingURL=([^'"\n]+)\s*$/gm;

exports.install = function(resourcesPath, nodeRequire) {

const snapshotSourceMapConsumer = {

originalPositionFor({ line, column }) {

const { relativePath, row } = snapshotResult.translateSnapshotRow(line);

return {

column,

line: row,

source: path.join(resourcesPath, 'app', 'static', relativePath),

name: null

};

}

};

sourceMapSupport.install({

handleUncaughtExceptions: false,

// Most of this logic is the same as the default implementation in the

// source-map-support module, but we've overridden it to read the javascript

// code from our cache directory.

retrieveSourceMap: function(filePath) {

if (filePath === '<embedded>') {

return { map: snapshotSourceMapConsumer };

}

if (!cacheDirectory || !fs.isFileSync(filePath)) {

return null;

}

try {

var sourceCode = fs.readFileSync(filePath, 'utf8');

} catch (error) {

console.warn('Error reading source file', error.stack);

return null;

}

let compiler = COMPILERS[path.extname(filePath)];

if (!compiler) compiler = COMPILERS['.js'];

try {

var fileData = readCachedJavaScript(

compiler.getCachePath(sourceCode, filePath)

);

} catch (error) {

console.warn('Error reading compiled file', error.stack);

return null;

}

if (fileData == null) {

return null;

}

let match, lastMatch;

INLINE_SOURCE_MAP_REGEXP.lastIndex = 0;

while ((match = INLINE_SOURCE_MAP_REGEXP.exec(fileData))) {

lastMatch = match;

}

if (lastMatch == null) {

return null;

}

const sourceMappingURL = lastMatch[1];

const rawData = sourceMappingURL.slice(sourceMappingURL.indexOf(',') + 1);

try {

var sourceMap = JSON.parse(Buffer.from(rawData, 'base64'));

} catch (error) {

console.warn('Error parsing source map', error.stack);

return null;

}

return {

map: sourceMap,

url: null

};

}

});

const prepareStackTraceWithSourceMapping = Error.prepareStackTrace;

var prepareStackTrace = prepareStackTraceWithSourceMapping;

function prepareStackTraceWithRawStackAssignment(error, frames) {

if (error.rawStack) {

// avoid infinite recursion

return prepareStackTraceWithSourceMapping(error, frames);

} else {

error.rawStack = frames;

return prepareStackTrace(error, frames);

}

Error.stackTraceLimit = 30;

Object.defineProperty(Error, 'prepareStackTrace', {

get: function() {

return prepareStackTraceWithRawStackAssignment;

set: function(newValue) {

prepareStackTrace = newValue;

process.nextTick(function() {

prepareStackTrace = prepareStackTraceWithSourceMapping;

});

}

});

// eslint-disable-next-line no-extend-native

Error.prototype.getRawStack = function() {

// Access this.stack to ensure prepareStackTrace has been run on this error

// because it assigns this.rawStack as a side-effect

this.stack; // eslint-disable-line no-unused-expressions

return this.rawStack;

};

Object.keys(COMPILERS).forEach(function(extension) {

const compiler = COMPILERS[extension];

Object.defineProperty(nodeRequire.extensions, extension, {

enumerable: true,

writable: false,

value: function(module, filePath) {

const code = compileFileAtPath(compiler, filePath, extension);

return module._compile(code, filePath);

}

});

};

exports.supportedExtensions = Object.keys(COMPILERS);

exports.resetCacheStats();

atom/src/compile-cache.js at master · buzz/atom · GitHub

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