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https://github.com/eliotsykes/real-world-rails

Real World Rails applications and their open source codebases for developers to learn from
https://github.com/eliotsykes/real-world-rails

examples learning-rails rails-application real-world real-world-rails ruby ruby-on-rails

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Real World Rails applications and their open source codebases for developers to learn from

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# Real World Rails



> Real World Rails applications and their open source codebases for developers to learn from



This project brings 100+ (and growing) active, open source Rails apps and engines together in one repository, making it easier for developers to download the collected codebases and learn from Rails apps written by experienced developers. Reading open source code can be an invaluable learning aid. You’ll find the source code in the [`apps/`](apps/) and [`engines/`](engines/) subdirectories.



Real World Rails was begun to help teach newer developers and to research and write about Rails development practices:



- Find example usage of a method you’re unsure of

- Learn how other developers use a gem you’d like to use

- Discover how to write tests

- See how Rails engines are built

- …and much, much more.



## How to install on your computer



Ensure you have git-lfs installed: https://git-lfs.com



```bash

# Clone this git repo:

git clone [email protected]:eliotsykes/real-world-rails.git



cd real-world-rails/



# The Rails apps are linked to as git submodules.

GIT_LFS_SKIP_SMUDGE=1 git submodule update --init --single-branch --jobs 4



# To run the `bin/rwr` inspectors, install gems:

bundle install



echo "All done! Why not run some inspections? Run bin/rwr"

```



## How to update your local copy of real-world-rails



Pull the latest commits from this repo and update submodules:

```bash

git pull

GIT_LFS_SKIP_SMUDGE=1 git submodule update

```



## Other Real World Codebase Collections



- Real World Sinatra https://github.com/jeromedalbert/real-world-sinatra

- Real World Ember https://github.com/eliotsykes/real-world-ember

- Real World Ruby Apps https://github.com/jeromedalbert/real-world-ruby-apps

- Real World React https://github.com/jeromedalbert/real-world-react

- Real World Django https://github.com/ckrybus/real-world-django



## How you can analyze Real World Rails apps



#### Find job subclasses



This will find most, but not all job subclasses (requires [ag](https://github.com/ggreer/the_silver_searcher#installing)):



```bash

# Outputs jobs source in terminal

ag --ruby '< [A-Za-z]+Job\b'



# Open each job in your editor (e.g. atom)

ag --ruby -l '< [A-Za-z]+Job\b' | xargs atom

```



(used to research [Real World Rails Background Jobs](https://www.eliotsykes.com/real-world-rails-background-jobs))



#### List models from *every* Real World Rails application



Interested in seeing how your fellow developers name their models? Run:



```bash

bin/rwr models | sort -f | uniq -c | sort -k 1nr -k 2f

```



#### Show constants of every Real World Rails app



```bash

bin/rwr constants

```

(this helped when researching [Magic Numbers in Ruby & How You Make Them Disappear](https://eliotsykes.com/magic-numbers))



#### Show view specs



See the file path and source of every view spec in every app:

```bash

bin/rwr view-specs

```

(this will show 250+ view specs, see them in [The Big List of View Specs](https://eliotsykes.com/view-specs))



#### Show model methods



See just the model method names and file paths:

```bash

bin/rwr model-method-names

```



See the model method source and file paths:

```bash

bin/rwr model-methods

```



#### Find projects using gem



```bash

find apps/ -name Gemfile.lock | xargs grep GEM_NAME_GOES_HERE



# e.g. Find all projects using doorkeeper gem

find apps/ -name Gemfile.lock | xargs grep doorkeeper

```



#### Analyze view naming practices



```bash

bin/rwr shared-view-dirs

bin/rwr view-naming

```



#### Find ideas on how to configure your foreman processes



```bash

# Outputs contents from all Procfiles

find apps/ -name 'Procfile*' | xargs cat

```



## Settings



#### Analyzing directories outside of `apps/`



Prefix the `bin/rwr` command with the `FILES_PATTERN` environment variable:



```bash

FILES_PATTERN=~/dev/my-rails-app/**/*.rb bin/rwr

```



#### Change source output format to markdown



Prefix `bin/rwr` with the `SOURCE_OUTPUT_FORMAT` environment variable:

```bash

SOURCE_OUTPUT_FORMAT=markdown bin/rwr view-specs

```



## Information for Contributors



#### How to add a Real World Rails app



Given a GitHub repo for a Rails app `githubuser/foo`:



```bash

# Inside real-world-rails root:

# Replace  with correct branch (probably 'main').

GIT_LFS_SKIP_SMUDGE=1 git submodule add -b  [email protected]:githubuser/foo.git apps/foo

```



#### How to remove a git submodule



Only use this if a previously public repo has been removed:



```bash

# Remove the submodule from .git/config

git submodule deinit -f path/to/submodule



# Remove the submodule from .git/modules

rm -rf .git/modules/path/to/submodule



# Remove from .gitmodules and remove the submodule directory

git rm -f path/to/submodule

```



#### Writing an Inspector? Some docs to help understand AST, Parser…



The [inspectors](lib/real_world_rails/inspectors) are responsible for the analysis of the Rails apps.



Review the existing [inspectors](lib/real_world_rails/inspectors) if you're looking for some info on how to write a new one, and see these API docs:



- http://whitequark.github.io/ast/AST/Node.html

- http://www.rubydoc.info/github/whitequark/parser/master/Parser/AST/Processor

- http://whitequark.github.io/ast/AST/Processor.html