https://github.com/sinatra/mustermann

your personal string matching expert
https://github.com/sinatra/mustermann

Keywords from Contributors

rack sinatra activerecord mvc activejob rubygem multithreading grape rspec rubocop

Last synced: 9 minutes ago
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Repository metadata

your personal string matching expert

Host: GitHub
URL: https://github.com/sinatra/mustermann
Owner: sinatra
License: mit
Created: 2013-04-27T12:14:43.000Z (almost 13 years ago)
Default Branch: main
Last Pushed: 2025-08-13T11:27:08.000Z (7 months ago)
Last Synced: 2026-02-06T07:40:53.666Z (26 days ago)
Language: Ruby
Homepage: http://sinatrarb.com/mustermann/
Size: 982 KB
Stars: 664
Watchers: 13
Forks: 65
Open Issues: 6
Releases: 0
Metadata Files:
- Readme: README.md
- License: LICENSE
- Support: support/lib/support.rb

The Amazing Mustermann

Code Climate maintainability

This repository contains multiple projects (each installable as separate gems).

mustermann: Your personal string matching expert. This is probably what you're looking for.
mustermann-contrib: A meta gem depending on all other official mustermann gems.
mustermann-fileutils: Efficient file system operations using Mustermann patterns.
mustermann-strscan: A version of Ruby's StringScanner made for pattern objects.
mustermann-visualizer: Syntax highlighting and tree visualization for patterns.'
A selection of pattern types for mustermann, each as their own little library, see below.

Git versions with Bundler

You can easily use the latest edge version from GitHub of any of these gems via Bundler:

github 'sinatra/mustermann' do
  gem 'mustermann'
  gem 'mustermann-contrib'
end

Pattern Types

The identity, regexp and sinatra types are included in the mustermann gem, all the other types have their own gems.

Any software using Mustermann is obviously compatible with at least one of the above.

Requirements

Ruby 2.6+ compatible Ruby implementation.

JRuby support is unknown, see more in issue #72.

Release History

Mustermann follows Semantic Versioning 2.0. Anything documented in the README or via YARD and not declared private is part of the public API.

Stable Releases

Mustermann 3.0.4 (2025-08-03)
- Ruby 3.4+ compatibility: Use URI::RFC2396_Parser in mustermann-contrib #146 @dentarg
Mustermann 3.0.3 (2024-09-03)
- Fix performance issue for Mustermann::AST::Translator#escape #142 @hsbt, @ericproulx
Mustermann 3.0.2 (2024-08-09)
- Ruby 3.4+ compatibility: "Use rfc2396 parser instead of URI::DEFAULT_PARSER" #139 @hsbt
Mustermann 3.0.1 (2024-07-31)
- Ruby 3.4+ compatibility: "Use URI::RFC2396_Parser#regex explicitly" #138 @hsbt
Mustermann 3.0.0 (2022-07-24)
- Drop support for old Rubies < 2.6.
Mustermann 2.0.2 (2022-07-22)
- Further improve Ruby 3 compatibility. #134. @magni-
Mustermann 2.0.1 (2022-07-19)
- Properly fix Ruby 3 compatability issue, reverts #126. Resolved by #130 @eregon, @tconst, @dentarg
Mustermann 2.0.0 (2022-07-18)
- Improve Ruby 3 compatibility. Removed built-in Sinatra 1 support, and moved to new mustermann-sinatra-extension gem. Fixes #114 @epergo
Mustermann 1.1.2 (2022-07-16)
- Add compatibility with --enable=frozen-string-literal param. Fixes #110 @michal-granec
Mustermann 1.1.1 (2020-01-04)
- Make sure that requireing ruby2_keywords when needed. Fixes #102 @Annih
Mustermann 1.1.0 (2019-12-30)
- Proper handling of Mustermann::ExpandError. Fixes #88 @namusyaka
- Support Ruby 3 keyword arguments. @mame
  - At the same time, we dropped a support that accepts options followed by mappings on Mustermann::Mapper. Reference commit
- Improve documentation and development. @horaciob, @epistrephein, @jbampton, @jkowens, @junaruga
Mustermann 1.0.3 (2018-08-17)
- Handle with_look_ahead on SafeRenderer. Fixes sinatra/sinatra#1409 @namusyaka
- Fix EqualityMap#fetch to be compatible with the fallback Hash#fetch. Fixes #89 @eregon
- Improve code base and documentation. @sonots, @iguchi1124
Mustermann 1.0.2 (2018-02-17)
- Look ahead same patterns as its own when concatenation. Fixes sinatra/sinatra#1361 @namusyaka
- Improve development support and documentation. @EdwardBetts, @284km, @yb66 and @garybernhardt
Mustermann 1.0.1 (2017-08-26)

Docs
- Updating readme to list Ruby 2.2 as minimum commit (@cassidycodes)
- Fix rendering of HTML table commit (@stevenwilkin)
- Update summary and description in gemspec file. commit (@junaruga)
Fixes
- avoid infinite loop by removing comments when receiving extended regexp commit (@namusyaka)
- avoid unintended conflict of namespace commit (@namusyaka)
- use Regexp#source instead of Regexp#inspect commit (@namusyaka)
Mustermann 1.0.0 (2017-03-05)
- First stable release.
- Includes mustermann, and mustermann-contrib gems
- Sinatra patterns: Allow | outside of parens.
- Add concatenation support (Mustermann::Pattern#+).
- Mustermann::Sinatra#| may now generate a Sinatra pattern instead of a real composite.
- Add syntax highlighting support for composite patterns.
- Remove routers (they were out of scope for the main gem).
- Rails patterns: Add Rails 5.0 compatibility mode, make it default.
- Moved tool gem EqualityMap to Mustermann::EqualityMap in core
- Improve documentation.

Development Releases

Mustermann 0.4.0 (2014-11-26)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Split into multiple gems.
- Add Pattern#to_proc.
- Add Pattern#|, Pattern#& and Pattern#^.
- Add Pattern#peek, Pattern#peek_size, Pattern#peek_match and Pattern#peek_params.
- Add Mustermann::StringScanner.
- Add Pattern#to_templates.
- Add | syntax to sinatra templates.
- Add template style placeholders to sinatra templates.
- Add cake, express, flask and pyramid patterns.
- Allow passing in additional value behavior directly to Pattern#expand.
- Fix expanding of multiple splats.
- Add expanding to identity patterns.
- Add mustermann-fileutils.
- Make expander accept hashes with string keys.
- Allow named splats to be named splat.
- Support multiple Rails versions.
- Type option can be set to nil to get the default type.
- Add mustermann-visualizer.
Mustermann 0.3.1 (2014-09-12)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Speed up pattern generation and matching (thanks Daniel Mendler)
- Small change so Mustermann === Mustermann.new('...') returns true.
Mustermann 0.3.0 (2014-08-18)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Add regexp pattern.
- Add named splats to Sinatra patterns.
- Add Mustermann::Mapper.
- Improve duck typing support.
- Improve documentation.
Mustermann 0.2.0 (2013-08-24)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Add first class expander objects.
- Add params casting for expander.
- Add simple router and rack router.
- Add weak equality map to significantly improve performance.
- Fix Ruby warnings.
- Improve documentation.
- Refactor pattern validation, AST transformations.
- Increase test coverage (from 100%+ to 100%++).
- Improve JRuby compatibility.
- Work around bug in 2.0.0-p0.
Mustermann 0.1.0 (2013-05-12)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Add Pattern#expand for generating strings from patterns.
- Add better internal API for working with the AST.
- Improved documentation.
- Avoids parsing the path twice when used as Sinatra extension.
- Better exceptions for unknown pattern types.
- Better handling of edge cases around extend.
- More specs to ensure API stability.
- Largely rework internals of Sinatra, Rails and Template patterns.
Mustermann 0.0.1 (2013-04-27)
- More Infos:
  RubyGems.org,
  RubyDoc.info,
  GitHub.com
- Initial Release.

Owner metadata

Name: Sinatra
Login: sinatra
Email:
Kind: organization
Description:
Website: http://www.sinatrarb.com
Location:
Twitter:
Company:
Icon url: https://avatars.githubusercontent.com/u/8312?v=4
Repositories: 12
Last ynced at: 2024-03-25T19:32:57.740Z
Profile URL: https://github.com/sinatra

GitHub Events

Total

Delete event: 1
Pull request event: 4
Fork event: 1
Watch event: 4
Issue comment event: 11
Push event: 5
Create event: 1

Last Year

Delete event: 1
Pull request event: 4
Fork event: 1
Watch event: 1
Issue comment event: 11
Push event: 5
Create event: 1

Committers metadata

Last synced: 3 days ago

Total Commits: 331
Total Committers: 41
Avg Commits per committer: 8.073
Development Distribution Score (DDS): 0.489

Commits in past year: 7
Committers in past year: 2
Avg Commits per committer in past year: 3.5
Development Distribution Score (DDS) in past year: 0.143

Name	Email	Commits
Konstantin Haase	k**s@g**m	169
namusyaka	n**a@g**m	37
Patrik Ragnarsson	p**k@s**t	31
Zachary Scott	m**l@z**o	12
Jordan Owens	j**s@g**m	12
Olle Jonsson	o**n@g**m	11
Vipul A M	v**d@g**m	8
Benoit Daloze	e**p@g**m	6
Yusuke Endoh	m**e@r**g	5
Paul Padier	p**r@o**m	3
284km	k**0@g**m	2
Giuseppe Capizzi	g**i@g**m	2
Hiroshi SHIBATA	h**t@r**g	2
Jun Aruga	j**a@r**m	2
René Föhring	rf@b****e	2
mishina	t**8@g**m	2
Michal Granec	m**c@g**m	1
Iain Barnett	i**d@g**m	1
Eloy Perez	e**z@c**m	1
Anton Paisov	p**v@g**m	1
stjhimy	s**y@g**m	1
horaciob	h**b@g**m	1
Tommaso Barbato	e**n@g**m	1
Steven Wilkin	s**n@g**m	1
Shota Iguchi	s**i@c**m	1
Samuel Williams	s**s@o**z	1
ReadmeCritic	f**t@g**m	1
Peter Goldstein	p**n@g**m	1
Noah Clark	n**h@n**t	1
Nate Berkopec	n**c@g**m	1
and 11 more...

Committer domains:

Issue and Pull Request metadata

Last synced: 10 days ago

Total issues: 31
Total pull requests: 76
Average time to close issues: 8 months
Average time to close pull requests: about 2 months
Total issue authors: 25
Total pull request authors: 37
Average comments per issue: 3.39
Average comments per pull request: 1.91
Merged pull request: 71
Bot issues: 0
Bot pull requests: 0

Past year issues: 3
Past year pull requests: 4
Past year average time to close issues: 11 days
Past year average time to close pull requests: 7 days
Past year issue authors: 3
Past year pull request authors: 2
Past year average comments per issue: 3.67
Past year average comments per pull request: 1.5
Past year merged pull request: 3
Past year bot issues: 0
Past year bot pull requests: 0

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/sinatra/mustermann

Top Issue Authors

namusyaka (4)
rkh (3)
dometto (2)
plexus (1)
tobidelius (1)
mscrivo (1)
dillonwelch (1)
brometeo (1)
andriytyurnikov (1)
minad (1)
rschwass (1)
eregon (1)
pravi (1)
brett-novu (1)
dblock (1)

Top Pull Request Authors

namusyaka (18)
olleolleolle (9)
hsbt (5)
eregon (4)
dentarg (3)
junaruga (3)
jkowens (3)
epergo (2)
ericproulx (2)
rkh (2)
mishina2228 (2)
284km (2)
iguchi1124 (2)
Annih (1)
jbampton (1)

Top Issue Labels

feature (5)
bug (3)
sinatra pattern (3)
all patterns (2)
rails pattern (1)
template pattern (1)
compatibility (1)

Top Pull Request Labels

Package metadata

Total packages: 16
Total downloads:
- rubygems: 540,206,341 total
Total docker downloads: 1,669,882,814
Total dependent packages: 65 (may contain duplicates)
Total dependent repositories: 35,465 (may contain duplicates)
Total versions: 117
Total maintainers: 5

gem.coop: mustermann

A library implementing patterns that behave like regular expressions.

Homepage: https://github.com/sinatra/mustermann
Documentation: http://www.rubydoc.info/gems/mustermann/
Licenses: MIT
Latest release: 3.0.4 (published 7 months ago)
Last Synced: 2026-03-02T01:02:20.511Z (2 days ago)
Versions: 24
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 267,702,466 Total
Docker Downloads: 834,941,380
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 0.051%
- Downloads: 0.096%
- Docker downloads count: 0.109%
Maintainers (5)
- jkowens
- namusyaka
- zzak
- dentarg
- rkh

ubuntu-20.04: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses: mit
Latest release: 1.0.0-4 (published 19 days ago)
Last Synced: 2026-02-13T07:18:13.799Z (19 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 0.468%
- Stargazers count: 0.787%
- Forks count: 1.086%

rubygems.org: mustermann

A library implementing patterns that behave like regular expressions.

Homepage: https://github.com/sinatra/mustermann
Documentation: http://www.rubydoc.info/gems/mustermann/
Licenses: MIT
Latest release: 3.0.4 (published 7 months ago)
Last Synced: 2026-03-02T18:03:54.514Z (1 day ago)
Versions: 24
Dependent Packages: 57
Dependent Repositories: 35,392
Downloads: 267,802,998 Total
Docker Downloads: 834,941,380
Rankings:
- Downloads: 0.098%
- Docker downloads count: 0.133%
- Dependent repos count: 0.173%
- Dependent packages count: 0.495%
- Average: 1.102%
- Stargazers count: 2.246%
- Forks count: 3.467%
Maintainers (5)
- jkowens
- namusyaka
- zzak
- dentarg
- rkh

gem.coop: mustermann-contrib

Adds many plugins to Mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: http://www.rubydoc.info/gems/mustermann-contrib/
Licenses: MIT
Latest release: 3.0.4 (published 7 months ago)
Last Synced: 2026-03-02T17:33:46.599Z (1 day ago)
Versions: 18
Dependent Packages: 0
Dependent Repositories: 0
Downloads: 2,351,346 Total
Docker Downloads: 27
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 1.238%
- Downloads: 2.244%
- Docker downloads count: 2.709%
Maintainers (4)
- jkowens
- namusyaka
- zzak
- dentarg

rubygems.org: mustermann-contrib

Adds many plugins to Mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: http://www.rubydoc.info/gems/mustermann-contrib/
Licenses: MIT
Latest release: 3.0.4 (published 7 months ago)
Last Synced: 2026-02-28T21:01:08.368Z (3 days ago)
Versions: 18
Dependent Packages: 8
Dependent Repositories: 73
Downloads: 2,349,531 Total
Docker Downloads: 27
Rankings:
- Dependent packages count: 2.055%
- Stargazers count: 2.236%
- Downloads: 2.456%
- Average: 2.757%
- Dependent repos count: 3.138%
- Docker downloads count: 3.198%
- Forks count: 3.457%
Maintainers (4)
- jkowens
- namusyaka
- zzak
- dentarg

proxy.golang.org: github.com/sinatra/mustermann

Homepage:
Documentation: https://pkg.go.dev/github.com/sinatra/mustermann#section-documentation
Licenses: mit
Latest release: v3.0.4+incompatible (published 7 months ago)
Last Synced: 2026-02-28T21:01:08.872Z (3 days ago)
Versions: 22
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent packages count: 9.56%
- Average: 10.169%
- Dependent repos count: 10.779%

ubuntu-24.04: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses:
Latest release: 3.0.0-2 (published 27 days ago)
Last Synced: 2026-02-05T07:42:41.696Z (27 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

ubuntu-23.04: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses:
Latest release: 3.0.0-2 (published 21 days ago)
Last Synced: 2026-02-11T00:29:50.109Z (21 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-24.10: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses:
Latest release: 3.0.0-2 (published 24 days ago)
Last Synced: 2026-02-08T06:35:19.080Z (24 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

ubuntu-23.10: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses:
Latest release: 3.0.0-2 (published 22 days ago)
Last Synced: 2026-02-09T20:07:26.067Z (22 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

debian-11: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: https://packages.debian.org/bullseye/ruby-mustermann
Licenses:
Latest release: 1.1.1-1 (published 21 days ago)
Last Synced: 2026-02-13T08:22:49.317Z (19 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-10: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: https://packages.debian.org/buster/ruby-mustermann
Licenses:
Latest release: 1.0.0-4 (published 20 days ago)
Last Synced: 2026-02-13T04:23:19.312Z (19 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

guix: ruby-mustermann

Library implementing patterns that behave like regular expressions

Homepage: https://github.com/sinatra/mustermann
Documentation: https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/ruby-xyz.scm#n14590
Licenses: expat
Latest release: 3.0.0 (published 1 day ago)
Last Synced: 2026-03-02T18:55:39.745Z (1 day ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

ubuntu-22.04: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Licenses:
Latest release: 1.1.1-1 (published 18 days ago)
Last Synced: 2026-02-13T13:21:16.688Z (18 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-13: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: https://packages.debian.org/trixie/ruby-mustermann
Licenses: mit
Latest release: 3.0.0-2 (published 19 days ago)
Last Synced: 2026-02-13T13:17:46.408Z (18 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:
- Dependent repos count: 0.0%
- Dependent packages count: 0.0%
- Average: 100%

debian-12: ruby-mustermann

Homepage: https://github.com/sinatra/mustermann
Documentation: https://packages.debian.org/bookworm/ruby-mustermann
Licenses:
Latest release: 3.0.0-2 (published 19 days ago)
Last Synced: 2026-02-12T23:35:38.337Z (19 days ago)
Versions: 1
Dependent Packages: 0
Dependent Repositories: 0
Rankings:

Dependencies

Gemfile rubygems

support >= 0 development
ruby2_keywords >= 0

mustermann/mustermann.gemspec rubygems

ruby2_keywords ~> 0.0.1

mustermann-contrib/mustermann-contrib.gemspec rubygems

hansi ~> 0.2.0

support/support.gemspec rubygems

addressable >= 0
coveralls >= 0
rack-test >= 0
rake >= 0
rspec >= 0
rspec-its >= 0
simplecov ~> 0.17.0
sinatra ~> 1.4
tool ~> 0.2
yard >= 0

.github/workflows/test.yml actions

actions/checkout v3 composite
ruby/setup-ruby v1 composite

Score: 31.737165370651187