RailsStats

See stuff about a Rails app.

There were a few things missing to the included rake stats

RailsStats mainly adds the ability to be run from outside the project in question. This can be helpful if the app you are interested in can not be booted for some reason.

Run it as a command line tool

Once the gem is installed you can point the rails-stats executable at any directory, without setting up a Rakefile. It accepts both absolute and relative paths:

$ rails-stats /path/to/app
$ rails-stats path/to/app

When no path is given it defaults to the current directory:

$ rails-stats

You can also request JSON output by passing json as a second argument:

$ rails-stats path/to/app json

Calling it through rake

If you prefer rake, there are two ways to reach the same code:

• From any directory, add a Rakefile that requires rails_stats and call the task with a path:

  # Rakefilerequire"rails_stats"

  $ rake stats\[/path/to/app/\]

• Inside your own Rails app, add rails_stats to your Gemfile to replace the default rake stats implementation (you might need to require "rails_stats" in your Rakefile), then run:

  $ bundle exec rake stats

Run it outside Rails project

The quickest way is the rails-stats executable, which does not require a Rakefile:

$ rails-stats /path/to/app
Directory: /path/to/app
+-----------------------|------------|----------------+
| Name | Total Deps | 1st Level Deps |
+-----------------------|------------|----------------+
| simplecov-console | 7 | 3 || codecov | 5 | 2 || rails_stats | 4 | 2 || simplecov | 3 | 3 || minitest-around | 1 | 1 || bundler | 0 | 0 || byebug | 0 | 0 || minitest | 0 | 0 || minitest-spec-context | 0 | 0 |
+-----------------------|------------|----------------+
Declared Gems 9
Total Gems 18
Unpinned Versions 8
Github Refs 0
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Name | Files | Lines | LOC | Classes | Methods | M/C | LOC/M |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Channels | 2 | 8 | 8 | 2 | 0 | 0 | 0 || Configuration | 19 | 417 | 111 | 1 | 0 | 0 | 0 || Controllers | 1 | 7 | 6 | 1 | 1 | 1 | 4 || Helpers | 1 | 3 | 3 | 0 | 0 | 0 | 0 || Javascripts | 3 | 27 | 7 | 0 | 0 | 0 | 0 || Jobs | 1 | 7 | 2 | 1 | 0 | 0 | 0 || Libraries | 1 | 1 | 1 | 0 | 0 | 0 | 0 || Mailers | 1 | 4 | 4 | 1 | 0 | 0 | 0 || Model Tests | 2 | 5 | 4 | 2 | 0 | 0 | 0 || Models | 1 | 3 | 3 | 1 | 0 | 0 | 0 || Spec Support | 1 | 1 | 1 | 0 | 0 | 0 | 0 || Test Support | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Code | 30 | 477 | 145 | 7 | 1 | 0 | 143 || Tests | 4 | 7 | 6 | 2 | 0 | 0 | 0 || Total | 34 | 484 | 151 | 9 | 1 | 0 | 149 |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
Code LOC: 145 Test LOC: 6 Code to Test Ratio: 1:0.0 Files: 34

Run it on many Rails engines

$ fordirin /path/to/many/engines/*/;do rails-stats "$dir";done

Component-based and Packwerk (packs) applications

RailsStats understands large Rails monoliths that are organized into packs (via packs-rails) or components (component-based Rails).

When packs or components are detected, rails-stats automatically prints a breakdown per pack/component, a Core Application section for everything that lives in the main app, and a Total (all packs) section that aggregates the whole monolith:

$ rails-stats /path/to/monolith
== Core Application ==
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Name | Files | Lines | LOC | Classes | Methods | M/C | LOC/M |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| ... |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
== Pack: packs/pack1 ==
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| ... |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
== Total (all packs) ==
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| ... |
+----------------------+---------+---------+---------+---------+---------+-----+-------+

A directory is treated as a pack when it contains a package.yml file (the Packwerk marker) or when it lives directly under a packs/ or components/ directory and holds any of the usual code folders (app, lib, spec, test). Nested packs (packs/a/packs/b) are supported.

You can also scope stats to a single pack:

$ rails-stats packs/pack1

The same breakdown is available in JSON under a "packs" key:

$ rails-stats . json

Things it knows about

RailsStats adds more coverage than the default.

• Any concepts you've added within an app directory
• Configuration files
• Library files
• Gems that you've created and embedded in the project
• Engines and their code
• RSpec/Unit/Cucumber Tests

Example output

Here are some open source Rails projects and their output.

$ rails-stats /users/brian/examples/redmine/
+-----------------------|------------|----------------+
| Name | Total Deps | 1st Level Deps |
+-----------------------|------------|----------------+
| rails | 62 | 13 || roadie-rails | 45 | 2 || actionpack-xml_parser | 41 | 2 || importmap-rails | 41 | 3 || propshaft | 41 | 4 || stimulus-rails | 41 | 1 || rubocop-rails | 28 | 5 || rubocop-performance | 15 | 3 || html-pipeline | 14 | 2 || rails-dom-testing | 14 | 3 || rubocop | 14 | 10 || bullet | 13 | 2 || capybara | 10 | 8 || debug | 10 | 2 || mail | 7 | 4 || selenium-webdriver | 5 | 5 || rails_stats | 4 | 2 || svg_sprite | 4 | 3 || bundle-audit | 3 | 1 || listen | 3 | 2 || net-imap | 3 | 2 || sanitize | 3 | 2 || simplecov | 3 | 3 || mini_magick | 2 | 2 || net-pop | 2 | 1 || net-smtp | 2 | 1 || rbpdf | 2 | 2 || rqrcode | 2 | 2 || addressable | 1 | 1 || i18n | 1 | 1 || mocha | 1 | 1 || nokogiri | 1 | 1 || puma | 1 | 1 || commonmarker | 0 | 0 || csv | 0 | 0 || ffi | 0 | 0 || marcel | 0 | 0 || mini_mime | 0 | 0 || net-ldap | 0 | 0 || rack | 0 | 0 || rotp | 0 | 0 || rouge | 0 | 0 || rubyzip | 0 | 0 || tzinfo-data | 0 | 0 || yard | 0 | 0 |
+-----------------------|------------|----------------+
Declared Gems 45
Total Gems 144
Unpinned Versions 19
Github Refs 0
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Name | Files | Lines | LOC | Classes | Methods | M/C | LOC/M |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Configuration | 17 | 1090 | 666 | 7 | 14 | 2 | 45 || Controllers | 57 | 9042 | 6746 | 60 | 554 | 9 | 10 || Functional Tests | 65 | 35754 | 30234 | 65 | 2104 | 32 | 12 || Helper Tests | 27 | 5369 | 4090 | 28 | 302 | 10 | 11 || Helpers | 49 | 7068 | 5168 | 1 | 413 | 413 | 10 || Integration Tests | 98 | 10349 | 7237 | 104 | 297 | 2 | 22 || Javascripts | 117 | 6930 | 5362 | 0 | 446 | 0 | 10 || Job Tests | 2 | 142 | 94 | 2 | 2 | 1 | 45 || Jobs | 3 | 115 | 90 | 3 | 9 | 3 | 8 || Libraries | 134 | 18922 | 13178 | 128 | 1167 | 9 | 9 || Models | 88 | 20110 | 14528 | 110 | 1532 | 13 | 7 || Other Tests | 19 | 2339 | 1525 | 19 | 98 | 5 | 13 || Test Support | 16 | 1637 | 1229 | 20 | 142 | 7 | 6 || Unit Tests | 147 | 37173 | 28642 | 161 | 2778 | 17 | 8 || Validators | 1 | 29 | 10 | 1 | 1 | 1 | 8 |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
| Code | 466 | 63306 | 45748 | 310 | 4136 | 13 | 9 || Tests | 374 | 92763 | 73051 | 399 | 5723 | 14 | 10 || Total | 840 | 156069 | 118799 | 709 | 9859 | 13 | 10 |
+----------------------+---------+---------+---------+---------+---------+-----+-------+
Code LOC: 45748 Test LOC: 73051 Code to Test Ratio: 1:1.6 Files: 840

JSON Format

If you want to export the details using JSON, you can use this command:

$ rails-stats test/dummy json
Directory: /Users/etagwerker/Projects/redmine
[{"summary":{"declared":45,"unpinned":19,"total":144,"github":0},"gems":[{"name":"rails","total_dependencies":62,"first_level_dependencies":13,"top_level_dependencies":{},"transitive_dependencies":["actioncable (= 7.2.2.1)","actionmailbox (= 7.2.2.1)","actionmailer (= 7.2.2.1)","actionpack (= 7.2.2.1)","actiontext (= 7.2.2.1)","actionview (= 7.2.2.1)","activejob (= 7.2.2.1)","activemodel (= 7.2.2.1)","activerecord (= 7.2.2.1)","activestorage (= 7.2.2.1)","activesupport (= 7.2.2.1)","bundler (>= 1.15.0)","railties (= 7.2.2.1)","nio4r (~> 2.0)","websocket-driver (>= 0.6.1)","zeitwerk (~> 2.6)","nokogiri (>= 1.8.5)","racc (>= 0)","rack (>= 2.2.4, < 3.2)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","websocket-extensions (>= 0.1.0)","mail (>= 2.8.0)","globalid (>= 0.3.6)","timeout (>= 0.4.0)","marcel (~> 1.0)","mini_mime (>= 0.1.1)","net-imap (>= 0)","net-pop (>= 0)","net-smtp (>= 0)","date (>= 0)","net-protocol (>= 0)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","stringio (>= 0)","io-console (~> 0.5)"]},{"name":"roadie-rails","total_dependencies":45,"first_level_dependencies":2,"top_level_dependencies":{},"transitive_dependencies":["railties (>= 5.1, < 8.1)","roadie (~> 5.0)","actionpack (= 7.2.2.1)","activesupport (= 7.2.2.1)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","zeitwerk (~> 2.6)","actionview (= 7.2.2.1)","nokogiri (>= 1.8.5)","racc (>= 0)","rack (>= 2.2.4, < 3.2)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","date (>= 0)","stringio (>= 0)","io-console (~> 0.5)","css_parser (~> 1.4)","addressable (>= 0)","public_suffix (>= 2.0.2, < 7.0)"]},{"name":"actionpack-xml_parser","total_dependencies":41,"first_level_dependencies":2,"top_level_dependencies":{},"transitive_dependencies":["actionpack (>= 5.0)","railties (>= 5.0)","actionview (= 7.2.2.1)","activesupport (= 7.2.2.1)","nokogiri (>= 1.8.5)","racc (>= 0)","rack (>= 2.2.4, < 3.2)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","zeitwerk (~> 2.6)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","date (>= 0)","stringio (>= 0)","io-console (~> 0.5)"]},{"name":"importmap-rails","total_dependencies":41,"first_level_dependencies":3,"top_level_dependencies":{},"transitive_dependencies":["actionpack (>= 6.0.0)","activesupport (>= 6.0.0)","railties (>= 6.0.0)","actionview (= 7.2.2.1)","nokogiri (>= 1.8.5)","racc (>= 0)","rack (>= 2.2.4, < 3.2)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","zeitwerk (~> 2.6)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","date (>= 0)","stringio (>= 0)","io-console (~> 0.5)"]},{"name":"propshaft","total_dependencies":41,"first_level_dependencies":4,"top_level_dependencies":{},"transitive_dependencies":["actionpack (>= 7.0.0)","activesupport (>= 7.0.0)","rack (>= 0)","railties (>= 7.0.0)","actionview (= 7.2.2.1)","nokogiri (>= 1.8.5)","racc (>= 0)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","zeitwerk (~> 2.6)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","date (>= 0)","stringio (>= 0)","io-console (~> 0.5)"]},{"name":"stimulus-rails","total_dependencies":41,"first_level_dependencies":1,"top_level_dependencies":{},"transitive_dependencies":["railties (>= 6.0.0)","actionpack (= 7.2.2.1)","activesupport (= 7.2.2.1)","irb (~> 1.13)","rackup (>= 1.0.0)","rake (>= 12.2)","thor (~> 1.0, >= 1.2.2)","zeitwerk (~> 2.6)","actionview (= 7.2.2.1)","nokogiri (>= 1.8.5)","racc (>= 0)","rack (>= 2.2.4, < 3.2)","rack-session (>= 1.0.1)","rack-test (>= 0.6.3)","rails-dom-testing (~> 2.2)","rails-html-sanitizer (~> 1.6)","useragent (~> 0.16)","builder (~> 3.1)","erubi (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","loofah (~> 2.21)","crass (~> 1.0.2)","pp (>= 0.6.0)","rdoc (>= 4.0.0)","reline (>= 0.4.2)","prettyprint (>= 0)","erb (>= 0)","psych (>= 4.0.0)","date (>= 0)","stringio (>= 0)","io-console (~> 0.5)"]},{"name":"rubocop-rails","total_dependencies":28,"first_level_dependencies":5,"top_level_dependencies":{},"transitive_dependencies":["activesupport (>= 4.2.0)","lint_roller (~> 1.1)","rack (>= 1.1)","rubocop (>= 1.75.0, < 2.0)","rubocop-ast (>= 1.38.0, < 2.0)","base64 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(7.2.2.1)","importmap-rails":"importmap-rails (2.1.0)","propshaft":"propshaft (1.1.0)","rails":"rails (7.2.2.1)","railties":"railties (7.2.2.1)","roadie-rails":"roadie-rails (3.3.0)","stimulus-rails":"stimulus-rails (1.3.4)"},"transitive_dependencies":["activesupport (>= 5.0.0)","minitest (>= 0)","nokogiri (>= 1.6)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)","racc (~> 1.4)"]},{"name":"rubocop","total_dependencies":14,"first_level_dependencies":10,"top_level_dependencies":{"rubocop-performance":"rubocop-performance (1.25.0)","rubocop-rails":"rubocop-rails (2.31.0)"},"transitive_dependencies":["json (~> 2.3)","language_server-protocol (~> 3.17.0.2)","lint_roller (~> 1.1.0)","parallel (~> 1.10)","parser (>= 3.3.0.2)","rainbow (>= 2.2.2, < 4.0)","regexp_parser (>= 2.9.3, < 3.0)","rubocop-ast (>= 1.44.0, < 2.0)","ruby-progressbar (~> 1.7)","unicode-display_width (>= 2.4.0, < 4.0)","ast (~> 2.4.1)","racc (>= 0)","prism (~> 1.4)","unicode-emoji (~> 4.0, >= 4.0.4)"]},{"name":"bullet","total_dependencies":13,"first_level_dependencies":2,"top_level_dependencies":{},"transitive_dependencies":["activesupport (>= 3.0.0)","uniform_notifier (~> 1.11)","base64 (>= 0)","benchmark (>= 0.3)","bigdecimal (>= 0)","concurrent-ruby (~> 1.0, >= 1.3.1)","connection_pool (>= 2.2.5)","drb (>= 0)","i18n (>= 1.6, < 2)","logger (>= 1.4.2)","minitest (>= 5.1)","securerandom (>= 0.3)","tzinfo (~> 2.0, >= 2.0.5)"]},{"name":"capybara","total_dependencies":10,"first_level_dependencies":8,"top_level_dependencies":{},"transitive_dependencies":["addressable (>= 0)","matrix (>= 0)","mini_mime (>= 0.1.3)","nokogiri (~> 1.11)","rack (>= 1.6.0)","rack-test (>= 0.6.3)","regexp_parser (>= 1.5, < 3.0)","xpath (~> 3.2)","public_suffix (>= 2.0.2, < 7.0)","racc (~> 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Testing

In order to run the tests for this gem:

bundle exec rake test# Running:
..
Fabulous run in 0.097903s, 20.4284 runs/s, 142.9987 assertions/s.
2 runs, 14 assertions, 0 failures, 0 errors, 0 skips

TODO

• Option to print out by app directory (stats per engine)
• Add views (jbuilder, erb, haml) but don't count towards ratios
• Support JS for projects that have it in public (but not compiled)
• Add CSS but don't count towards ratios
• Output other metrics like number of tables and columns
• Different output formatters