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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;
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