initial commit

node_modules/sass-graph/sass-graph.js

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+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+var _ = require('lodash');
+var glob = require('glob');
+var parseImports = require('./parse-imports');
+
+// resolve a sass module to a path
+function resolveSassPath(sassPath, loadPaths, extensions) {
+  // trim sass file extensions
+  var re = new RegExp('(\.('+extensions.join('|')+'))$', 'i');
+  var sassPathName = sassPath.replace(re, '');
+  // check all load paths
+  var i, j, length = loadPaths.length, scssPath, partialPath;
+  for (i = 0; i < length; i++) {
+    for (j = 0; j < extensions.length; j++) {
+      scssPath = path.normalize(loadPaths[i] + '/' + sassPathName + '.' + extensions[j]);
+      try {
+        if (fs.lstatSync(scssPath).isFile()) {
+          return scssPath;
+        }
+      } catch (e) {}
+    }
+
+    // special case for _partials
+    for (j = 0; j < extensions.length; j++) {
+      scssPath = path.normalize(loadPaths[i] + '/' + sassPathName + '.' + extensions[j]);
+      partialPath = path.join(path.dirname(scssPath), '_' + path.basename(scssPath));
+      try {
+        if (fs.lstatSync(partialPath).isFile()) {
+          return partialPath;
+        }
+      } catch (e) {}
+    }
+  }
+
+  // File to import not found or unreadable so we assume this is a custom import
+  return false;
+}
+
+function Graph(options, dir) {
+  this.dir = dir;
+  this.extensions = options.extensions || [];
+  this.index = {};
+  this.follow = options.follow || false;
+  this.loadPaths = _(options.loadPaths).map(function(p) {
+    return path.resolve(p);
+  }).value();
+
+  if (dir) {
+    var graph = this;
+    _.each(glob.sync(dir+'/**/*.@('+this.extensions.join('|')+')', { dot: true, nodir: true, follow: this.follow }), function(file) {
+      graph.addFile(path.resolve(file));
+    });
+  }
+}
+
+// add a sass file to the graph
+Graph.prototype.addFile = function(filepath, parent) {
+  var entry = this.index[filepath] = this.index[filepath] || {
+    imports: [],
+    importedBy: [],
+    modified: fs.statSync(filepath).mtime
+  };
+
+  var resolvedParent;
+  var isIndentedSyntax = path.extname(filepath) === '.sass';
+  var imports = parseImports(fs.readFileSync(filepath, 'utf-8'), isIndentedSyntax);
+  var cwd = path.dirname(filepath);
+
+  var i, length = imports.length, loadPaths, resolved;
+  for (i = 0; i < length; i++) {
+    loadPaths = _([cwd, this.dir]).concat(this.loadPaths).filter().uniq().value();
+    resolved = resolveSassPath(imports[i], loadPaths, this.extensions);
+    if (!resolved) continue;
+
+    // recurse into dependencies if not already enumerated
+    if (!_.includes(entry.imports, resolved)) {
+      entry.imports.push(resolved);
+      this.addFile(fs.realpathSync(resolved), filepath);
+    }
+  }
+
+  // add link back to parent
+  if (parent) {
+    resolvedParent = _(parent).intersection(this.loadPaths).value();
+
+    if (resolvedParent) {
+      resolvedParent = parent.substr(parent.indexOf(resolvedParent));
+    } else {
+      resolvedParent = parent;
+    }
+
+    entry.importedBy.push(resolvedParent);
+  }
+};
+
+// visits all files that are ancestors of the provided file
+Graph.prototype.visitAncestors = function(filepath, callback) {
+  this.visit(filepath, callback, function(err, node) {
+    if (err || !node) return [];
+    return node.importedBy;
+  });
+};
+
+// visits all files that are descendents of the provided file
+Graph.prototype.visitDescendents = function(filepath, callback) {
+  this.visit(filepath, callback, function(err, node) {
+    if (err || !node) return [];
+    return node.imports;
+  });
+};
+
+// a generic visitor that uses an edgeCallback to find the edges to traverse for a node
+Graph.prototype.visit = function(filepath, callback, edgeCallback, visited) {
+  filepath = fs.realpathSync(filepath);
+  var visited = visited || [];
+  if (!this.index.hasOwnProperty(filepath)) {
+    edgeCallback('Graph doesn\'t contain ' + filepath, null);
+  }
+  var edges = edgeCallback(null, this.index[filepath]);
+
+  var i, length = edges.length;
+  for (i = 0; i < length; i++) {
+    if (!_.includes(visited, edges[i])) {
+      visited.push(edges[i]);
+      callback(edges[i], this.index[edges[i]]);
+      this.visit(edges[i], callback, edgeCallback, visited);
+    }
+  }
+};
+
+function processOptions(options) {
+  return _.assign({
+    loadPaths: [process.cwd()],
+    extensions: ['scss', 'css', 'sass'],
+  }, options);
+}
+
+module.exports.parseFile = function(filepath, options) {
+  if (fs.lstatSync(filepath).isFile()) {
+    filepath = path.resolve(filepath);
+    options = processOptions(options);
+    var graph = new Graph(options);
+    graph.addFile(filepath);
+    return graph;
+  }
+  // throws
+};
+
+module.exports.parseDir = function(dirpath, options) {
+  if (fs.lstatSync(dirpath).isDirectory()) {
+    dirpath = path.resolve(dirpath);
+    options = processOptions(options);
+    var graph = new Graph(options, dirpath);
+    return graph;
+  }
+  // throws
+};