Reverse engineering JavaScript and CSS sources from sourcemaps

The name of the project is for honouring the legacy of a certain master from the Ryukyu archipelago who contributed to the martial arts that we today know as karate and ryukyu kobujutsu.

Install the shuji command line utility globally with npm. Elevated privileges might be needed via sudo, depending on the platform. In most cases just:

npm install --global shuji

Please note that the minimum supported version of Node.js is 8.11.1, which is the active Long Term Support (LTS) version.

The output of shuji --help pretty much covers all the options:

shuji - Reverse engineering JavaScript and CSS sources from sourcemaps
Usage: shuji [options] <file|directory>

  -h, --help               Help and usage instructions
  -o, --output-dir String  Output directory - default: .
  -p, --preserve           Preserve sourcemap's original folder structure.
  -M, --match String       Regular expression for matching and filtering files -
                           default: \.map$
  -v, --verbose            Verbose output, will print which file is currently being
                           processed
  -V, --version            Version number

Version 0.6.1

Test files are generated with UglifyJS 3 and sass by using files from the stretchy project, with the following commands:

uglifyjs stretchy.js --compress --mangle \
 --output stretchy.min.js --source-map includeSources
mv stretchy.min.js.map stretchy-with-sources.min.js.map

uglifyjs stretchy.js --compress --mangle \
 --output stretchy.min.js --source-map "url=inline"
mv stretchy.min.js stretchy-inline-sources.min.js

uglifyjs stretchy.js --compress --mangle \
 --output stretchy.min.js --source-map "url=stretchy.min.js.map"

sass stretchy.scss:stretchy.css

sass stretchy.scss:stretchy-inline.css --embed-source-map

Unit tests are written with tape and can be executed with npm test. Code coverage is inspected with nyc and can be executed with npm run coverage after running npm test. Please make sure it is over 90% at all times.

"A Beginner's Guide to Open Source: The Best Advice for Making your First Contribution".

Also there is a blog post about "45 Github Issues Dos and Don’ts".

Linting is done with ESLint and can be executed with npm run lint. There should be no errors appearing after any JavaScript file changes.

Please note that any features or changed will not be merged without working unit tests.

• v0.6.1 (2019-09-13)
  • Dependency update and better unit test coverage
• v0.6.0 (2019-05-27)
  • Removed the option for directory recursion, it is now always a recursive operation
  • Support for reading inline source maps, from JavaScript and CSS files
  • Use npm-shrinkwrap.json for locking the working set of 3rd party dependencies
• v0.5.1 (2019-05-21)
  • Updated dependencies in order to remove possible security vulnerabilities
• v0.5.0 (2018-10-24)
  • Minimum Node.js version lifted from 6.9.5 to 8.11.1
  • Ignoring parts in the filename after ?
• v0.4.0 (2017-08-10)
  • Minimum Node.js version lifted from 4.2.0 to 6.9.5
  • Configure code coverage reporting to correctly validate unit test coverage, via --exclude configuration
  • Dependencies are once again up to date
• v0.3.1 (2016-08-08)
  • Test also in Windows, at AppVeyor
• v0.3.0 (2016-07-07)
  • Start using shared ESLint configuration #1
  • Test against Node.js v6
• v0.2.0 (2016-03-14)
  • Do not overwrite existing files, instead skip them
• v0.1.0 (2016-02-12)
  • Initial release which can make it happen

Copyright (c) Juga Paazmaya [email protected]

Licensed under the MIT license.