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.TH "gemstash-readme" "7" "November 30, 2015" "" ""
.SH Gemstash
.SS What is Gemstash?
Gemstash is both a cache for remote servers such as
https://rubygems.org, and a private gem source.
.PP
If you are using bundler (https://bundler.io/) across many machines that
have access to a server within your control, you might want to use
Gemstash.
.PP
If you produce gems that you don[cq]t want everyone in the world to
have access to, you might want to use Gemstash.
.PP
If you frequently bundle the same set of gems across multiple projects,
you might want to use Gemstash.
.PP
Are you only using gems from https://rubygems.org, and don[cq]t bundle
the same gems frequently?
Well, maybe you don[cq]t need Gemstash&...
yet.
.PP
Gemstash is maintained by Ruby Central (https://rubycentral.org/), a
non-profit committed to supporting the critical Ruby infrastructure you
rely on.
Contribute today as an individual, or even better, as a
company (https://rubycentral.org/#/portal/signup), and ensure that
Bundler, RubyGems, Gemstash, and other shared tooling is around for
years to come.
.SS Quickstart Guide
.SS Setup
Gemstash is designed to be quick and painless to get set up.
By the end of this Quickstart Guide, you will be able to bundle stashed
gems from public sources against a Gemstash server running on your
machine.
.PP
Install Gemstash to get started:
.IP
.EX
$ gem install gemstash
.EE
.PP
After it is installed, starting Gemstash requires no additional steps.
Simply start the Gemstash server with the \f[CR]gemstash\f[R] command:
.IP
.EX
$ gemstash start
.EE
.PP
You may have noticed that the command finished quickly.
This is because Gemstash will run the server in the background by
default.
The server runs on port 9292.
.SS Bundling
With the server running, you can bundle against it.
Tell Bundler that you want to use Gemstash to find gems from
RubyGems.org:
.IP
.EX
$ bundle config mirror.https://rubygems.org http://localhost:9292
.EE
.PP
Now you can create a Gemfile and install gems through Gemstash:
.IP
.EX
./Gemfile
source [dq]https://rubygems.org\[dq]
gem [dq]rubywarrior[dq]
.EE
.PP
The gems you include should be gems you don[cq]t yet have installed,
otherwise Gemstash will have nothing to stash.
Now bundle:
.IP
.EX
$ bundle install --path .bundle
.EE
.PP
Your Gemstash server has fetched the gems from https://rubygems.org and
cached them for you!
To prove this, you can disable your Internet connection and try again.
Gem files (*.gem) are cached indefinitely.
Gem dependencies metadata are cached for 30 minutes, so if you bundle
again before that, you can successfully bundle without an Internet
connection:
.IP
.EX
$ # Disable your Internet first!
$ rm -rf Gemfile.lock .bundle
$ bundle
.EE
.SS Falling back to rubygems.org
If you want to make sure that your bundling from https://rubygems.org
still works as expected when the Gemstash server is not running, you can
easily configure Bundler to fallback to https://rubygems.org.
.IP
.EX
$ bundle config mirror.https://rubygems.org.fallback_timeout true
.EE
.PP
You can also configure this fallback as a number of seconds in case the
Gemstash server is simply unresponsive.
This example uses a 3 second timeout:
.IP
.EX
$ bundle config mirror.https://rubygems.org.fallback_timeout 3
.EE
.SS Stopping the Server
Once you[cq]ve finish using your Gemstash server, you can stop it just
as easily as you started it:
.IP
.EX
$ gemstash stop
.EE
.PP
You[cq]ll also want to tell Bundler that it can go back to getting gems
from RubyGems.org directly, instead of going through Gemstash:
.IP
.EX
$ bundle config --delete mirror.https://rubygems.org
.EE
.SS Under the Hood
You might wonder where the gems are stored.
After running the commands above, you will find a new directory at
\f[CR][ti]/.gemstash\f[R].
This directory holds all the cached and private gems.
It also has a server log, the database, and configuration for Gemstash.
If you prefer, you can point to a different directory.
.PP
Gemstash uses SQLite (https://www.sqlite.org/) to store details about
private gems.
The database will be located in \f[CR][ti]/.gemstash\f[R], however you
won[cq]t see the database appear until you start using private gems.
If you prefer, you can use a different database.
.PP
Gemstash temporarily caches things like gem dependencies in memory.
Anything cached in memory will last for 30 minutes before being
retrieved again.
You can use memcached instead of caching in memory.
Gem files are always cached permanently, so bundling with a
\f[CR]Gemfile.lock\f[R] with all gems cached will never call out to
https://rubygems.org.
.PP
The server you ran is provided via Puma (https://puma.io/) and
Rack (https://github.com/rack/rack), however they are not customizable
at this point.
.SS Deep Dive
Deep dive into more subjects:
.IP [bu] 2
Private gems
.IP [bu] 2
Multiple gem sources
.IP [bu] 2
Using Gemstash as a mirror
.IP [bu] 2
Customizing the server (database, storage, caching, and more)
.IP [bu] 2
Deploying Gemstash
.IP [bu] 2
Debugging Gemstash
.SS Reference
An anatomy of various configuration and commands:
.IP [bu] 2
Configuration
.IP [bu] 2
Authorize
.IP [bu] 2
Start
.IP [bu] 2
Stop
.IP [bu] 2
Status
.IP [bu] 2
Setup
.IP [bu] 2
Version
.PP
To see what has changed in recent versions of Gemstash, see the
CHANGELOG (https://github.com/rubygems/gemstash/blob/main/CHANGELOG.md).
.SS Development
After checking out the repo, run \f[CR]bin/setup\f[R] to install
dependencies.
Then, run \f[CR]rake\f[R] to run RuboCop and the tests.
While developing, you can run \f[CR]bin/gemstash\f[R] to run Gemstash.
You can also run \f[CR]bin/console\f[R] for an interactive prompt that
will allow you to experiment.
.SS Contributing
Bug reports and pull requests are welcome on GitHub at
https://github.com/rubygems/gemstash.
This project is intended to be a safe, welcoming space for
collaboration, and contributors are expected to adhere to the
Contributor
Covenant (https://github.com/rubygems/gemstash/blob/main/CODE_OF_CONDUCT.md)
code of conduct.
.SS License
The gem is available as open source under the terms of the MIT
License (http://opensource.org/licenses/MIT).