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node_modules/node-sass/lib/watcher.js 1.78 KB
aaac7fed   liuqimichale   add
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  var grapher = require('sass-graph'),
    clonedeep = require('lodash.clonedeep'),
    path = require('path'),
    config = {},
    watcher = {},
    graph = null;
  
  watcher.reset = function(opts) {
    config = clonedeep(opts || config || {});
    var options = {
      loadPaths: config.includePath,
      extensions: ['scss', 'sass', 'css'],
      follow: config.follow,
    };
  
    if (config.directory) {
      graph = grapher.parseDir(config.directory, options);
    } else {
      graph = grapher.parseFile(config.src, options);
    }
  
    return Object.keys(graph.index);
  };
  
  watcher.changed = function(absolutePath) {
    var files = {
      added: [],
      changed: [],
      removed: [],
    };
  
    this.reset();
  
    if (absolutePath && path.basename(absolutePath)[0] !== '_') {
      files.changed.push(absolutePath);
    }
  
    graph.visitAncestors(absolutePath, function(parent) {
      if (path.basename(parent)[0] !== '_') {
        files.changed.push(parent);
      }
    });
  
    graph.visitDescendents(absolutePath, function(child) {
      files.added.push(child);
    });
  
    return files;
  };
  
  watcher.added = function(absolutePath) {
    var files = {
      added: [],
      changed: [],
      removed: [],
    };
  
    this.reset();
  
    if (Object.keys(graph.index).indexOf(absolutePath) === -1) {
      files.added.push(absolutePath);
    }
  
    graph.visitDescendents(absolutePath, function(child) {
      files.added.push(child);
    });
  
    return files;
  };
  
  watcher.removed = function(absolutePath) {
    var files = {
      added: [],
      changed: [],
      removed: [],
    };
  
    graph.visitAncestors(absolutePath, function(parent) {
      if (path.basename(parent)[0] !== '_') {
        files.changed.push(parent);
      }
    });
  
    if (Object.keys(graph.index).indexOf(absolutePath) !== -1) {
      files.removed.push(absolutePath);
    }
  
    this.reset();
  
    return files;
  };
  
  module.exports = watcher;