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node_modules/node-sass/lib/extensions.js

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+/*!
+ * node-sass: lib/extensions.js
+ */
+
+var eol = require('os').EOL,
+  fs = require('fs'),
+  path = require('path'),
+  trueCasePathSync = require('true-case-path').trueCasePathSync,
+  pkg = require('../package.json'),
+  defaultBinaryDir = path.join(__dirname, '..', 'vendor');
+
+/**
+ * Get the human readable name of the Platform that is running
+ *
+ * @param  {string} platform - An OS platform to match, or null to fallback to
+ * the current process platform
+ * @return {Object} The name of the platform if matched, false otherwise
+ *
+ * @api public
+ */
+function getHumanPlatform(platform) {
+  switch (platform || process.platform) {
+    case 'darwin': return 'OS X';
+    case 'freebsd': return 'FreeBSD';
+    case 'linux': return 'Linux';
+    case 'linux_musl': return 'Linux/musl';
+    case 'win32': return 'Windows';
+    default: return false;
+  }
+}
+
+/**
+ * Provides a more readable version of the architecture
+ *
+ * @param  {string} arch - An instruction architecture name to match, or null to
+ * lookup the current process architecture
+ * @return {Object} The value of the process architecture, or false if unknown
+ *
+ * @api public
+ */
+function getHumanArchitecture(arch) {
+  switch (arch || process.arch) {
+    case 'ia32': return '32-bit';
+    case 'x86': return '32-bit';
+    case 'x64': return '64-bit';
+    default: return false;
+  }
+}
+
+/**
+ * Get the friendly name of the Node environment being run
+ *
+ * @param  {Object} abi - A Node Application Binary Interface value, or null to
+ * fallback to the current Node ABI
+ * @return {Object} Returns a string name of the Node environment or false if
+ * unmatched
+ *
+ * @api public
+ */
+function getHumanNodeVersion(abi) {
+  switch (parseInt(abi || process.versions.modules, 10)) {
+    case 11: return 'Node 0.10.x';
+    case 14: return 'Node 0.12.x';
+    case 42: return 'io.js 1.x';
+    case 43: return 'io.js 1.1.x';
+    case 44: return 'io.js 2.x';
+    case 45: return 'io.js 3.x';
+    case 46: return 'Node.js 4.x';
+    case 47: return 'Node.js 5.x';
+    case 48: return 'Node.js 6.x';
+    case 49: return 'Electron 1.3.x';
+    case 50: return 'Electron 1.4.x';
+    case 51: return 'Node.js 7.x';
+    case 53: return 'Electron 1.6.x';
+    case 57: return 'Node.js 8.x';
+    case 59: return 'Node.js 9.x';
+    case 64: return 'Node.js 10.x';
+    case 67: return 'Node.js 11.x';
+    case 72: return 'Node.js 12.x';
+    case 79: return 'Node.js 13.x';
+    case 83: return 'Node.js 14.x';
+    case 88: return 'Node.js 15.x';
+    case 93: return 'Node.js 16.x';
+    case 102: return 'Node.js 17.x';
+    case 108: return 'Node.js 18.x';
+    case 111: return 'Node.js 19.x';
+    default: return false;
+  }
+}
+
+/**
+ * Get a human readable description of where node-sass is running to support
+ * user error reporting when something goes wrong
+ *
+ * @param  {string} env - The name of the native bindings that is to be parsed
+ * @return {string} A description of what os, architecture, and Node version
+ * that is being run
+ *
+ * @api public
+ */
+function getHumanEnvironment(env) {
+  var binding = env.replace(/_binding\.node$/, ''),
+    parts = binding.split('-'),
+    platform = getHumanPlatform(parts[0]),
+    arch = getHumanArchitecture(parts[1]),
+    runtime = getHumanNodeVersion(parts[2]);
+
+  if (parts.length !== 3) {
+    return 'Unknown environment (' + binding + ')';
+  }
+
+  if (!platform) {
+    platform = 'Unsupported platform (' + parts[0] + ')';
+  }
+
+  if (!arch) {
+    arch = 'Unsupported architecture (' + parts[1] + ')';
+  }
+
+  if (!runtime) {
+    runtime = 'Unsupported runtime (' + parts[2] + ')';
+  }
+
+  return [
+    platform, arch, 'with', runtime,
+  ].join(' ');
+}
+
+/**
+ * Get the value of the binaries under the default path
+ *
+ * @return {Array} The currently installed node-sass bindings
+ *
+ * @api public
+ */
+function getInstalledBinaries() {
+  return fs.readdirSync(getBinaryDir());
+}
+
+/**
+ * Check that an environment matches the allowlisted values or the current
+ * environment if no parameters are passed
+ *
+ * @param  {string} platform - The name of the OS platform(darwin, win32, etc...)
+ * @param  {string} arch - The instruction set architecture of the Node environment
+ * @param  {string} abi - The Node Application Binary Interface
+ * @return {Boolean} True, if node-sass supports the current platform, false otherwise
+ *
+ * @api public
+ */
+function isSupportedEnvironment(platform, arch, abi) {
+  return (
+    false !== getHumanPlatform(platform) &&
+    false !== getHumanArchitecture(arch) &&
+    false !== getHumanNodeVersion(abi)
+  );
+}
+
+/**
+ * Get the value of a CLI argument
+ *
+ * @param {String} name
+ * @param {Array} args
+ * @api private
+ */
+
+function getArgument(name, args) {
+  var flags = args || process.argv.slice(2),
+    index = flags.lastIndexOf(name);
+
+  if (index === -1 || index + 1 >= flags.length) {
+    return null;
+  }
+
+  return flags[index + 1];
+}
+
+/**
+ * Get binary name.
+ * If environment variable SASS_BINARY_NAME,
+ * .npmrc variable sass_binary_name or
+ * process argument --binary-name is provided,
+ * return it as is, otherwise make default binary
+ * name: {platform}-{arch}-{v8 version}.node
+ *
+ * @api public
+ */
+
+function getBinaryName() {
+  var binaryName,
+    variant,
+    platform = process.platform;
+
+  if (getArgument('--sass-binary-name')) {
+    binaryName = getArgument('--sass-binary-name');
+  } else if (process.env.SASS_BINARY_NAME) {
+    binaryName = process.env.SASS_BINARY_NAME;
+  } else if (process.env.npm_config_sass_binary_name) {
+    binaryName = process.env.npm_config_sass_binary_name;
+  } else if (pkg.nodeSassConfig && pkg.nodeSassConfig.binaryName) {
+    binaryName = pkg.nodeSassConfig.binaryName;
+  } else {
+    variant = getPlatformVariant();
+    if (variant) {
+      platform += '_' + variant;
+    }
+
+    binaryName = [
+      platform, '-',
+      process.arch, '-',
+      process.versions.modules
+    ].join('');
+  }
+
+  return [binaryName, 'binding.node'].join('_');
+}
+
+/**
+ * Determine the URL to fetch binary file from.
+ * By default fetch from the node-sass distribution
+ * site on GitHub.
+ *
+ * The default URL can be overridden using
+ * the environment variable SASS_BINARY_SITE,
+ * .npmrc variable sass_binary_site or
+ * or a command line option --sass-binary-site:
+ *
+ *   node scripts/install.js --sass-binary-site http://example.com/
+ *
+ * The URL should to the mirror of the repository
+ * laid out as follows:
+ *
+ * SASS_BINARY_SITE/
+ *
+ *  v3.0.0
+ *  v3.0.0/freebsd-x64-14_binding.node
+ *  ....
+ *  v3.0.0
+ *  v3.0.0/freebsd-ia32-11_binding.node
+ *  v3.0.0/freebsd-x64-42_binding.node
+ *  ... etc. for all supported versions and platforms
+ *
+ * @api public
+ */
+
+function getBinaryUrl() {
+  var site = getArgument('--sass-binary-site') ||
+             process.env.SASS_BINARY_SITE  ||
+             process.env.npm_config_sass_binary_site ||
+             (pkg.nodeSassConfig && pkg.nodeSassConfig.binarySite) ||
+             'https://github.com/sass/node-sass/releases/download';
+
+  return [site, 'v' + pkg.version, getBinaryName()].join('/');
+}
+
+/**
+ * Get binary dir.
+ * If environment variable SASS_BINARY_DIR,
+ * .npmrc variable sass_binary_dir or
+ * process argument --sass-binary-dir is provided,
+ * select it by appending binary name, otherwise
+ * use default binary dir.
+ * Once the primary selection is made, check if
+ * callers wants to throw if file not exists before
+ * returning.
+ *
+ * @api public
+ */
+
+function getBinaryDir() {
+  var binaryDir;
+
+  if (getArgument('--sass-binary-dir')) {
+    binaryDir = getArgument('--sass-binary-dir');
+  } else if (process.env.SASS_BINARY_DIR) {
+    binaryDir = process.env.SASS_BINARY_DIR;
+  } else if (process.env.npm_config_sass_binary_dir) {
+    binaryDir = process.env.npm_config_sass_binary_dir;
+  } else if (pkg.nodeSassConfig && pkg.nodeSassConfig.binaryDir) {
+    binaryDir = pkg.nodeSassConfig.binaryDir;
+  } else {
+    binaryDir = defaultBinaryDir;
+  }
+
+  return binaryDir;
+}
+
+/**
+ * Get binary path.
+ * If environment variable SASS_BINARY_PATH,
+ * .npmrc variable sass_binary_path or
+ * process argument --sass-binary-path is provided,
+ * select it by appending binary name, otherwise
+ * make default binary path using binary name.
+ * Once the primary selection is made, check if
+ * callers wants to throw if file not exists before
+ * returning.
+ *
+ * @api public
+ */
+
+function getBinaryPath() {
+  var binaryPath;
+
+  if (getArgument('--sass-binary-path')) {
+    binaryPath = getArgument('--sass-binary-path');
+  } else if (process.env.SASS_BINARY_PATH) {
+    binaryPath = process.env.SASS_BINARY_PATH;
+  } else if (process.env.npm_config_sass_binary_path) {
+    binaryPath = process.env.npm_config_sass_binary_path;
+  } else if (pkg.nodeSassConfig && pkg.nodeSassConfig.binaryPath) {
+    binaryPath = pkg.nodeSassConfig.binaryPath;
+  } else {
+    binaryPath = path.join(getBinaryDir(), getBinaryName().replace(/_(?=binding\.node)/, '/'));
+  }
+
+  try {
+    return trueCasePathSync(binaryPath) || binaryPath;
+  } catch (e) {
+    return binaryPath;
+  }
+}
+
+/**
+ * An array of paths suitable for use as a local disk cache of the binding.
+ *
+ * @return {[]String} an array of paths
+ * @api public
+ */
+function getCachePathCandidates() {
+  return [
+    process.env.npm_config_sass_binary_cache,
+    process.env.npm_config_cache,
+  ].filter(function(_) { return _; });
+}
+
+/**
+ * The most suitable location for caching the binding on disk.
+ *
+ * Given the candidates directories provided by `getCachePathCandidates()` this
+ * returns the first writable directory. By treating the candidate directories
+ * as a prioritised list this method is deterministic, assuming no change to the
+ * local environment.
+ *
+ * @return {String} directory to cache binding
+ * @api public
+ */
+function getBinaryCachePath() {
+  var i,
+    cachePath,
+    cachePathCandidates = getCachePathCandidates();
+
+  for (i = 0; i < cachePathCandidates.length; i++) {
+    cachePath = path.join(cachePathCandidates[i], pkg.name, pkg.version);
+
+    try {
+      fs.mkdirSync(cachePath, {recursive: true});
+      return cachePath;
+    } catch (e) {
+      // Directory is not writable, try another
+    }
+  }
+
+  return '';
+}
+
+/**
+ * The cached binding
+ *
+ * Check the candidates directories provided by `getCachePathCandidates()` for
+ * the binding file, if it exists. By treating the candidate directories
+ * as a prioritised list this method is deterministic, assuming no change to the
+ * local environment.
+ *
+ * @return {String} path to cached binary
+ * @api public
+ */
+function getCachedBinary() {
+  var i,
+    cachePath,
+    cacheBinary,
+    cachePathCandidates = getCachePathCandidates(),
+    binaryName = getBinaryName();
+
+  for (i = 0; i < cachePathCandidates.length; i++) {
+    cachePath = path.join(cachePathCandidates[i], pkg.name, pkg.version);
+    cacheBinary = path.join(cachePath, binaryName);
+
+    if (fs.existsSync(cacheBinary)) {
+      return cacheBinary;
+    }
+  }
+
+  return '';
+}
+
+/**
+ * Does the supplied binary path exist
+ *
+ * @param {String} binaryPath
+ * @api public
+ */
+
+function hasBinary(binaryPath) {
+  return fs.existsSync(binaryPath);
+}
+
+/**
+ * Get Sass version information
+ *
+ * @api public
+ */
+
+function getVersionInfo(binding) {
+  return [
+    ['node-sass', pkg.version, '(Wrapper)', '[JavaScript]'].join('\t'),
+    ['libsass  ', binding.libsassVersion(), '(Sass Compiler)', '[C/C++]'].join('\t'),
+  ].join(eol);
+}
+
+/**
+ * Gets the platform variant, currently either an empty string or 'musl' for Linux/musl platforms.
+ *
+ * @api public
+ */
+
+function getPlatformVariant() {
+  var contents = '';
+
+  if (process.platform !== 'linux') {
+    return '';
+  }
+
+  try {
+    contents = fs.readFileSync(process.execPath);
+
+    if (contents.indexOf('libc.musl-x86_64.so.1') !== -1) {
+      return 'musl';
+    }
+  } catch (err) { } // eslint-disable-line no-empty
+
+  return '';
+}
+
+module.exports.hasBinary = hasBinary;
+module.exports.getBinaryUrl = getBinaryUrl;
+module.exports.getBinaryName = getBinaryName;
+module.exports.getBinaryDir = getBinaryDir;
+module.exports.getBinaryPath = getBinaryPath;
+module.exports.getBinaryCachePath = getBinaryCachePath;
+module.exports.getCachedBinary = getCachedBinary;
+module.exports.getCachePathCandidates = getCachePathCandidates;
+module.exports.getVersionInfo = getVersionInfo;
+module.exports.getHumanEnvironment = getHumanEnvironment;
+module.exports.getInstalledBinaries = getInstalledBinaries;
+module.exports.isSupportedEnvironment = isSupportedEnvironment;