libnpmdiff

What is libnpmdiff?

The libnpmdiff package is a tool for comparing different versions of npm packages. It helps developers understand the changes between versions by providing a detailed diff of the package contents.

What are libnpmdiff's main functionalities?

Compare two versions of a package

This feature allows you to compare two specific versions of a package. The code sample demonstrates how to use libnpmdiff to compare version 1.0.0 and version 2.0.0 of a package named 'package-name'.

const libnpmdiff = require('libnpmdiff');

libnpmdiff('package-name@1.0.0', 'package-name@2.0.0').then(diff => {
  console.log(diff);
}).catch(err => {
  console.error(err);
});

Compare local package with a published version

This feature allows you to compare your local package with the latest published version. The code sample shows how to compare the current local package (denoted by '.') with the latest version of 'package-name'.

const libnpmdiff = require('libnpmdiff');

libnpmdiff('.', 'package-name@latest').then(diff => {
  console.log(diff);
}).catch(err => {
  console.error(err);
});

Output diff in different formats

This feature allows you to output the diff in different formats such as JSON. The code sample demonstrates how to get the diff in JSON format for two versions of 'package-name'.

const libnpmdiff = require('libnpmdiff');

libnpmdiff('package-name@1.0.0', 'package-name@2.0.0', { format: 'json' }).then(diff => {
  console.log(JSON.stringify(diff, null, 2));
}).catch(err => {
  console.error(err);
});

Other packages similar to libnpmdiff

diff

The 'diff' package provides a general-purpose text diffing utility. It can be used to compare any two strings or files, not just npm packages. While it is more versatile, it does not provide the npm-specific context that libnpmdiff does.

npm-diff

The 'npm-diff' package is another tool for comparing npm packages. It offers similar functionality to libnpmdiff but may have different options and output formats. It is a good alternative if you are looking for different features or performance characteristics.

diff2html

The 'diff2html' package converts diff output to HTML. It is useful for visualizing changes in a more readable format. While it does not directly compare npm packages, it can be used in conjunction with other diff tools to present the results in a user-friendly way.

README

libnpmdiff

The registry diff lib.

Table of Contents

• Example
• Install
• Contributing
• API
• LICENSE

Example

const libdiff = require('libnpmdiff')

const patch = await libdiff([
  'abbrev@1.1.0',
  'abbrev@1.1.1'
])
console.log(
  patch
)

Returns:

diff --git a/package.json b/package.json
index v1.1.0..v1.1.1 100644
--- a/package.json	
+++ b/package.json	
@@ -1,6 +1,6 @@
 {
   "name": "abbrev",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "Like ruby's abbrev module, but in js",
   "author": "Isaac Z. Schlueter <[e-mail]>",
   "main": "abbrev.js",

Install

$ npm install libnpmdiff

Contributing

The npm team enthusiastically welcomes contributions and project participation! There's a bunch of things you can do if you want to contribute! The Contributor Guide outlines the process for community interaction and contribution. Please don't hesitate to jump in if you'd like to, or even ask us questions if something isn't clear.

All participants and maintainers in this project are expected to follow the npm Code of Conduct, and just generally be excellent to each other.

Please refer to the Changelog for project history details, too.

Happy hacking!

API

> libnpmdif([ a, b ], [opts]) -> Promise<String>

Fetches the registry tarballs and compare files between a spec a and spec b. npm spec types are usually described in <pkg-name>@<version> form but multiple other types are alsos supported, for more info on valid specs take a look at npm-package-arg.

Options:

• color <Boolean>: Should add ANSI colors to string output? Defaults to false.
• tagVersionPrefix <Sring>: What prefix should be used to define version numbers. Defaults to v
• diffContext <Number>: How many lines of code to print before/after each diff. Defaults to 3.
• diffFiles <Array<String>>: If set only prints patches for the files listed in this array (also accepts globs). Defaults to undefined.
• diffIgnoreWhitespace <Boolean>: Whether or not should ignore changes in whitespace (very useful to avoid indentation changes extra diff lines). Defaults to false.
• diffNameOnly <Boolean>: Prints only file names and no patch diffs. Defaults to false.
• diffNoPrefix <Boolean>: If true then skips printing any prefixes in filenames. Defaults to false.
• diffSrcPrefix <String>: Prefix to be used in the filenames from a. Defaults to a/.
• diffDstPrefix <String>: Prefix to be used in the filenames from b. Defaults to b/.
• diffText <Boolean>: Should treat all files as text and try to print diff for binary files. Defaults to false.
• ...cache, registry and other common options accepted by pacote

Returns a Promise that fullfils with a String containing the resulting patch diffs.

Throws an error if either a or b are missing or if trying to diff more than two specs.

LICENSE

ISC