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node_modules/node-sass/lib/index.js

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+/*!
+ * node-sass: lib/index.js
+ */
+
+var path = require('path'),
+  clonedeep = require('lodash/cloneDeep'),
+  sass = require('./extensions');
+
+/**
+ * Require binding
+ */
+
+var binding = require('./binding')(sass);
+
+/**
+ * Get input file
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getInputFile(options) {
+  return options.file ? path.resolve(options.file) : null;
+}
+
+/**
+ * Get output file
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getOutputFile(options) {
+  var outFile = options.outFile;
+
+  if (!outFile || typeof outFile !== 'string' || (!options.data && !options.file)) {
+    return null;
+  }
+
+  return path.resolve(outFile);
+}
+
+/**
+ * Get source map
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getSourceMap(options) {
+  var sourceMap = options.sourceMap;
+
+  if (sourceMap && typeof sourceMap !== 'string' && options.outFile) {
+    sourceMap = options.outFile + '.map';
+  }
+
+  return sourceMap && typeof sourceMap === 'string' ? path.resolve(sourceMap) : null;
+}
+
+/**
+ * Get stats
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getStats(options) {
+  var stats = {};
+
+  stats.entry = options.file || 'data';
+  stats.start = Date.now();
+
+  return stats;
+}
+
+/**
+ * End stats
+ *
+ * @param {Object} stats
+ * @param {Object} sourceMap
+ * @api private
+ */
+
+function endStats(stats) {
+  stats.end = Date.now();
+  stats.duration = stats.end - stats.start;
+
+  return stats;
+}
+
+/**
+ * Get style
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getStyle(options) {
+  var styles = {
+    nested: 0,
+    expanded: 1,
+    compact: 2,
+    compressed: 3
+  };
+
+  return styles[options.outputStyle] || 0;
+}
+
+/**
+ * Get indent width
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getIndentWidth(options) {
+  var width = parseInt(options.indentWidth) || 2;
+
+  return width > 10 ? 2 : width;
+}
+
+/**
+ * Get indent type
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getIndentType(options) {
+  var types = {
+    space: 0,
+    tab: 1
+  };
+
+  return types[options.indentType] || 0;
+}
+
+/**
+ * Get linefeed
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getLinefeed(options) {
+  var feeds = {
+    cr: '\r',
+    crlf: '\r\n',
+    lf: '\n',
+    lfcr: '\n\r'
+  };
+
+  return feeds[options.linefeed] || '\n';
+}
+
+/**
+ * Build an includePaths string
+ * from the options.includePaths array and the SASS_PATH environment variable
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function buildIncludePaths(options) {
+  options.includePaths = options.includePaths || [];
+
+  if (Object.prototype.hasOwnProperty.call(process.env, 'SASS_PATH')) {
+    options.includePaths = options.includePaths.concat(
+      process.env.SASS_PATH.split(path.delimiter)
+    );
+  }
+
+  // Preserve the behaviour people have come to expect.
+  // This behaviour was removed from Sass in 3.4 and
+  // LibSass in 3.5.
+  options.includePaths.unshift(process.cwd());
+
+  return options.includePaths.join(path.delimiter);
+}
+
+/**
+ * Get options
+ *
+ * @param {Object} options
+ * @api private
+ */
+
+function getOptions(opts, cb) {
+  if (typeof opts !== 'object') {
+    throw new Error('Invalid: options is not an object.');
+  }
+  var options = clonedeep(opts || {});
+
+  options.sourceComments = options.sourceComments || false;
+  if (Object.prototype.hasOwnProperty.call(options, 'file')) {
+    options.file = getInputFile(options);
+  }
+  options.outFile = getOutputFile(options);
+  options.includePaths = buildIncludePaths(options);
+  options.precision = parseInt(options.precision) || 5;
+  options.sourceMap = getSourceMap(options);
+  options.style = getStyle(options);
+  options.indentWidth = getIndentWidth(options);
+  options.indentType = getIndentType(options);
+  options.linefeed = getLinefeed(options);
+
+  // context object represents node-sass environment
+  options.context = { options: options, callback: cb };
+
+  options.result = {
+    stats: getStats(options)
+  };
+
+  return options;
+}
+
+/**
+ * Executes a callback and transforms any exception raised into a sass error
+ *
+ * @param {Function} callback
+ * @param {Array} arguments
+ * @api private
+ */
+
+function tryCallback(callback, args) {
+  try {
+    return callback.apply(this, args);
+  } catch (e) {
+    if (typeof e === 'string') {
+      return new binding.types.Error(e);
+    } else if (e instanceof Error) {
+      return new binding.types.Error(e.message);
+    } else {
+      return new binding.types.Error('An unexpected error occurred');
+    }
+  }
+}
+
+/**
+ * Normalizes the signature of custom functions to make it possible to just supply the
+ * function name and have the signature default to `fn(...)`. The callback is adjusted
+ * to transform the input sass list into discrete arguments.
+ *
+ * @param {String} signature
+ * @param {Function} callback
+ * @return {Object}
+ * @api private
+ */
+
+function normalizeFunctionSignature(signature, callback) {
+  if (!/^\*|@warn|@error|@debug|\w+\(.*\)$/.test(signature)) {
+    if (!/\w+/.test(signature)) {
+      throw new Error('Invalid function signature format "' + signature + '"');
+    }
+
+    return {
+      signature: signature + '(...)',
+      callback: function() {
+        var args = Array.prototype.slice.call(arguments),
+          list = args.shift(),
+          i;
+
+        for (i = list.getLength() - 1; i >= 0; i--) {
+          args.unshift(list.getValue(i));
+        }
+
+        return callback.apply(this, args);
+      }
+    };
+  }
+
+  return {
+    signature: signature,
+    callback: callback
+  };
+}
+
+/**
+ * Render
+ *
+ * @param {Object} options
+ * @api public
+ */
+
+module.exports.render = function(opts, cb) {
+  var options = getOptions(opts, cb);
+
+  // options.error and options.success are for libsass binding
+  options.error = function(err) {
+    var payload = Object.assign(new Error(), JSON.parse(err));
+
+    if (cb) {
+      options.context.callback.call(options.context, payload, null);
+    }
+  };
+
+  options.success = function() {
+    var result = options.result;
+    var stats = endStats(result.stats);
+    var payload = {
+      css: result.css,
+      stats: stats
+    };
+    if (result.map) {
+      payload.map = result.map;
+    }
+
+    if (cb) {
+      options.context.callback.call(options.context, null, payload);
+    }
+  };
+
+  var importer = options.importer;
+
+  if (importer) {
+    if (Array.isArray(importer)) {
+      options.importer = [];
+      importer.forEach(function(subject, index) {
+        options.importer[index] = function(file, prev, bridge) {
+          function done(result) {
+            bridge.success(result === module.exports.NULL ? null : result);
+          }
+
+          var result = subject.call(options.context, file, prev, done);
+
+          if (result !== undefined) {
+            done(result);
+          }
+        };
+      });
+    } else {
+      options.importer = function(file, prev, bridge) {
+        function done(result) {
+          bridge.success(result === module.exports.NULL ? null : result);
+        }
+
+        var result = importer.call(options.context, file, prev, done);
+
+        if (result !== undefined) {
+          done(result);
+        }
+      };
+    }
+  }
+
+  var functions = clonedeep(options.functions);
+
+  if (functions) {
+    options.functions = {};
+
+    Object.keys(functions).forEach(function(subject) {
+      var cb = normalizeFunctionSignature(subject, functions[subject]);
+
+      options.functions[cb.signature] = function() {
+        var args = Array.prototype.slice.call(arguments),
+          bridge = args.pop();
+
+        function done(data) {
+          bridge.success(data);
+        }
+
+        var result = tryCallback(cb.callback.bind(options.context), args.concat(done));
+
+        if (result) {
+          done(result);
+        }
+      };
+    });
+  }
+
+  if (options.data) {
+    binding.render(options);
+  } else if (options.file) {
+    binding.renderFile(options);
+  } else {
+    cb({status: 3, message: 'No input specified: provide a file name or a source string to process' });
+  }
+};
+
+/**
+ * Render sync
+ *
+ * @param {Object} options
+ * @api public
+ */
+
+module.exports.renderSync = function(opts) {
+  var options = getOptions(opts);
+  var importer = options.importer;
+
+  if (importer) {
+    if (Array.isArray(importer)) {
+      options.importer = [];
+      importer.forEach(function(subject, index) {
+        options.importer[index] = function(file, prev) {
+          var result = subject.call(options.context, file, prev);
+
+          return result === module.exports.NULL ? null : result;
+        };
+      });
+    } else {
+      options.importer = function(file, prev) {
+        var result = importer.call(options.context, file, prev);
+
+        return result === module.exports.NULL ? null : result;
+      };
+    }
+  }
+
+  var functions = clonedeep(options.functions);
+
+  if (options.functions) {
+    options.functions = {};
+
+    Object.keys(functions).forEach(function(signature) {
+      var cb = normalizeFunctionSignature(signature, functions[signature]);
+
+      options.functions[cb.signature] = function() {
+        return tryCallback(cb.callback.bind(options.context), arguments);
+      };
+    });
+  }
+
+  var status;
+  if (options.data) {
+    status = binding.renderSync(options);
+  } else if (options.file) {
+    status = binding.renderFileSync(options);
+  } else {
+    throw new Error('No input specified: provide a file name or a source string to process');
+  }
+
+  var result = options.result;
+
+  if (status) {
+    result.stats = endStats(result.stats);
+    return result;
+  }
+
+  throw Object.assign(new Error(), JSON.parse(result.error));
+};
+
+/**
+ * API Info
+ *
+ * @api public
+ */
+
+module.exports.info = sass.getVersionInfo(binding);
+
+/**
+ * Expose sass types
+ */
+
+module.exports.types = binding.types;
+module.exports.TRUE = binding.types.Boolean.TRUE;
+module.exports.FALSE = binding.types.Boolean.FALSE;
+module.exports.NULL = binding.types.Null.NULL;