dependency-graph
Advanced tools
Package description
The dependency-graph npm package is a simple library for creating a directed graph of dependencies and performing operations on it. It allows for adding nodes and dependencies, detecting cycles, and performing depth-first searches among other functionalities. This package is particularly useful for managing and analyzing dependencies in software projects, ensuring that dependency structures are acyclic and well-organized.
Creating a Dependency Graph
This feature allows for the creation of a new dependency graph and the addition of nodes and dependencies between them. In the code sample, a graph is created, and two nodes, 'A' and 'B', are added with a dependency from 'A' to 'B'.
const { DepGraph } = require('dependency-graph');
const graph = new DepGraph();
graph.addNode('A');
graph.addNode('B');
graph.addDependency('A', 'B');Detecting Cycles
This feature checks if the dependency graph contains any cycles, which are sequences of dependencies that loop back on themselves. The code sample demonstrates how to check if the graph has any cycles.
const hasCycle = graph.hasCycle();Performing Depth-First Search
This feature performs a depth-first search to find all dependencies of a given node. The code sample shows how to find all dependencies of node 'A'. This is useful for understanding the full set of dependencies that a particular node or module relies on.
const dependenciesOfA = graph.dependenciesOf('A');Madge is a tool for generating a visual graph of module dependencies, also capable of finding circular dependencies. It is more focused on visualization and analysis of large codebases, making it a bit more comprehensive for those specific needs compared to dependency-graph.
Toposort is another npm package that focuses on sorting nodes in a directed graph topologically. While dependency-graph provides broad functionalities for managing and analyzing dependencies, toposort specializes in the sorting aspect, which is useful for determining the order of tasks or module loading.
Readme
Simple dependency graph
This is a simple dependency graph useful for determining the order to do a list of things that depend on certain items being done before they are.
To use, npm install dependency-graph and then require('dependency-graph').DepGraph
Nodes in the graph are just simple strings.
addNode(name) - add a node in the graphremoveNode(name) - remove a node from the graphhasNode(name) - check if a node exists in the graphaddDependency(from, to) - add a dependency between two nodes (will throw an Error if one of the nodes does not exist)removeDependency(from, to) - remove a dependency between two nodesdependenciesOf(name, leavesOnly) - get an array containing the nodes that the specified node depends on (transitively). If leavesOnly is true, only nodes that do not depend on any other nodes will be returned in the array.dependantsOf(name, leavesOnly) - get an array containing the nodes that depend on the specified node (transitively). If leavesOnly is true, only nodes that do not have any dependants will be returned in the array.overallOrder(leavesOnly) - construct the overall processing order for the dependency graph. If leavesOnly is true, only nodes that do not depend on any other nodes will be returned.var DepGraph = require('dependency-graph').DepGraph;
var graph = new DepGraph();
graph.addNode('a');
graph.addNode('b');
graph.addNode('c');
graph.addDependency('a', 'b');
graph.addDependency('b', 'c');
graph.dependenciesOf('a'); // ['c', 'b']
graph.dependenciesOf('b'); // ['c']
graph.dependantsOf('c'); // ['a', 'b']
graph.overallOrder(); // ['c', 'b', 'a']
graph.overallOrder(true); // ['c']
FAQs
Simple dependency graph.
The npm package dependency-graph receives a total of 4,074,201 weekly downloads. As such, dependency-graph popularity was classified as popular.
We found that dependency-graph demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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