Created
October 7, 2016 11:56
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var _ = require('lodash'); | |
var through = require('through2'); | |
var toposort = require('toposort'); | |
var ngDeps = require('ng-dependencies'); | |
var gutil = require('gulp-util'); | |
var PluginError = gutil.PluginError; | |
module.exports = function() { | |
var files = {}; | |
// module-file mapping | |
var modules = {}; | |
// deps | |
var deps = {}; | |
var transform = function(file, encoding, next) { | |
var dep | |
try { | |
dep = ngDeps(file.contents.toString()); | |
} catch(err) { | |
this.emit('error', new PluginError("angular-module-sort", 'Error in parsing: "' + file.relative + '", ' + err.message)); | |
return; | |
} | |
for(var k in dep.modules) { | |
modules[k] = file.relative; | |
} | |
files[file.relative] = file; | |
deps[file.relative] = dep.dependencies; | |
next(); | |
}; | |
var flush = function(next) { | |
for(var node in deps) { | |
var edges = deps[node]; | |
edges = _.map(edges, function(x) { return modules[x]; }); | |
edges = _.filter(edges, function(x) { return !!x; } ); | |
deps[node] = edges; | |
} | |
var graph = []; | |
var linked = []; | |
for(var node in deps) { | |
if(!deps[node].length) continue; | |
linked.push(node); | |
for(var i=0; i<deps[node].length; ++i) { | |
graph.push( [ node, deps[node][i] ] ); | |
linked.push(deps[node][i]); | |
} | |
} | |
var unused = _.difference(_.keys(files), linked); | |
var solution = _.concat(toposort(graph), unused).reverse(); | |
for (var i=0; i<solution.length; ++i) { | |
this.push(files[solution[i]]) | |
} | |
next(); | |
}; | |
return through.obj(transform, flush) | |
}; |
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