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ls-tree.js
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ls-tree.js
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"use strict";
/**
* Kind of like `npm ls`, but for an NPM module instead of your app
* (you don't need the dependencies installed locally)
*/
var getDeps = require('../'),
treeify = require('treeify'),
semver = require('semver'),
tmp, pkg;
if (!process.argv[2]) {
tmp = 'You must pass in the module argument. Usage: \n\n';
tmp += ' node ls-tree.js express@latest \n';
tmp += ' node ls-tree.js connect@2.0.x \n';
tmp += ' node ls-tree.js level\n';
console.error(tmp);
process.exit(1);
} else {
tmp = process.argv[2].split('@');
pkg = {
name : tmp[0],
version : tmp[1] || '*'
};
}
getDeps(pkg, function(err, deps) {
var tree;
if (err) {
throw err;
}
tree = getTree(pkg, deps);
console.log(treeify.asTree(tree));
});
/**
* Returns the dependency tree for a NPM module
*/
function getTree(root, deps) {
var tree;
tree = {};
populateItem(tree, root, deps);
return tree;
}
/**
* Traverses the node (module) and the subnodes (module dependencies)
*/
function populateItem(subtree, root, deps) {
var version, directDeps;
// dependency missing from the registry ?!
if (root.name && (typeof deps[root.name] === 'undefined')) {
subtree[root.name + '@MISSING_FROM_REGISTRY'] = {};
return;
}
version = semver.maxSatisfying(Object.keys(deps[root.name]), root.version);
subtree[root.name + '@' + version] = {};
directDeps = deps[root.name][version].dependencies || {};
Object.keys(directDeps).forEach(function(name) {
var _dep;
_dep = {
name : name,
version : directDeps[name]
};
populateItem(subtree[root.name + '@' + version], _dep, deps);
});
}