I'm going through Micharl Hartl's well known Rails tutorial, and this piece is confusing me. Every time a new app is set up, these commands are run:
$ bundle install --without production
$ bundle update
$ bundle install
I don't really get why install is being run twice. What is the effect of these three commands run in this sequence?
You should not have to run bundle install twice as bundle update will also install all of your gems (as well as updating them to their most current version). I have not read the tutorial you mentioned but perhaps the purpose of the second install is to install all of the gems, including those reserved for production.
Your second question, what is the effect of these three commands:
bundle install --without production
Inspect the gemfile, ignoring gems that are reserved for production
Resolve all dependencies
Install all gems and dependent gems
Save the exact version of each gem to Gemfile.lock
bundle update
Inspect the gemfile
Resolve all dependencies from scratch using the newest version of each gem and completely ignoring Gemfile.lock
Install all gems and dependent gems
Save the exact version of each gem to Gemfile.lock
bundle install
Because this is the first run of the production gems, inspect the gemfile and resolve dependencies of the production gems
Use Gemfile.lock for exact versions of all other gems to be installed
Install all gems and dependent gems
Save the exact version of each gem to Gemfile.lock
Hoped this helped, for more detailed info about the two commands check out this and this.
$ bundle install --without production prevents bundler from installing any of the production gems. It also gets saved in your local repository and you don't have to run it more than once. Any subsequent run of bundle install will include --without production.
bundle install installs only the missing gems from your Gemfile, while bundle update updates/installs every single gem to the latest version as specified in the GemFile..
Related
While running the bundle install, it stops installing when it reaches the installation of the byebug gem. Saying, the gem maybe corrupt. I have tried uninstalling the ruby application and also tried updating my ruby and also my rails version
If you are using Bundler 1.1 or later you can use bundle clean, or bundle clean --force just as you imagined you could. This is redundant if you're using bundle install --path (Bundler manages the location you specified with --path, so takes responsibility for removing outdated gems), but if you've used Bundler to install the gems as system gems then bundle clean --force will delete any system gems not required by your Gemfile. Blindingly obvious caveat: don't do this if you have other apps that rely on system gems that aren't in your Gemfile!
Source -Bundle Clean
I am developing with bundler under Windows and am wondering how to create the Gemfile.lock for my production environment.
What seems missing are the gems for other platforms. Running bundle install on
group :production do
gem 'mysql2'
end
on Windows creates a Gemfile.lock
mysql2 (0.3.18-x86-mingw32)
When deploying to a Linux environment this is obviously not correct, I would need the Gemfile.lock to also contain the correct result for Linux. I can run bundle install on Linux and learn that indeed
mysql2 (0.3.18)
is the correct gem for Linux. I then manually update the Gemfile.lock in the repository to contain both:
mysql2 (0.3.18)
mysql2 (0.3.18-x86-mingw32)
This works clean under both platforms, but it seems a kludge.
How can I tell bundle to resolve the Gemfile.lock for another platform other than the local one? I guess I need something like bundle install --all-platforms. What am I missing?
It would appear this is a known shortcoming in bundler and the workaround seems to be to run bundle pack on every platform you need to use.
Running the following commands will fix your issue.
bundle lock --add-platform x86_64-linux
bundle install
git add . ; git commit -m fix
Reference
https://www.moncefbelyamani.com/understanding-the-gemfile-lock-file/#platforms
https://bundler.io/man/gemfile.5.html#PLATFORMS
https://github.com/rubygems/rubygems/issues/4269#issuecomment-758564690
It seems when I run bundle package then bundle install --local then I run unicorn_rails, unicorn is still accessing system gems. I keep getting :
You have already activated rack 1.5.2, but your Gemfile requires rack
1.2.8. Using bundle exec may solve this.
And it shouldn't because rack 1.2.8 is in the vendor/cache.
bundle exec wont work because it seems to be a resource hog and the whole point of bundle package is avoid this whole mess in the first place.
So how do I get unicorn to get bundle environment to only use the vendor/cache gems?
bundle install --local takes gems in vendor/local and installs them using whatever your default gem command does. By default, that is a system-wide install. If you're using RVM or something else, it'll be in your current RVM gemset.
If you're installing in production, and you want to limit the app to your gems from vendor/local, you want to do bundle install --deployment. This will install the gems into vendor/bundle and set Bundler up to use those gems (and only those gems, not the system ones). If the gems aren't in vendor/local, it will download them. It won't update your Gemfile.lock, and best practice is to keep all your gems in vendor/cache up to date to prevent it from even trying to download gems.
You don't need to use bundle exec unless you're running a binary from one of the gems. If you're running rails server and having this problem, the reason is that the rails command is running from the shell's $PATH. It's presumably a different version of Rails than the one you'd like to use.
If that's the case, your options are to track down the path to the version of rails you want and run it explicitly, to use bundle exec, or to run bundle install --binstubs --deployment and add that bin directory to your PATH. I haven't noticed any overhead from bundle exec, but if you're concerned about that and still want to scope everything to your bundle, then use --binstubs (this is how Heroku does it, by the way).
I had unicorn 4.5.0 and after I did bundle update, I observe different versions of the same gem even though I wanted to use the latest version.
unicorn (4.6.1, 4.5.0)
How do I instruct the bundler to just keep the latest version.
As far as I can see you cannot instruct bundler to keep only the latest version when updating. You can delete all the old versions of all gems in one go:
bundle exec gem cleanup
(Reference)
You can instruct bundler to just use one version by putting that version in the gem file. Sometimes, I have had conflicts with rake, even though I did not explicitly have rake in my Gemfile, so I had to put the rake version that would be usable by all the other gems at the top of my Gemfile.
If your issue is that you used to use unicorn 4.5.0, and now it has installed unicorn 4.6.1 in you local gem source, you can tell gem to uninstall the version you no longer need.
gem uninstall unicorn --version 4.5.0
If you did a bundle --deployment and populated the vendor/bundle directory, and that is where you want to remove the gem from, then I usually just delete the gem directory, however, I think you can run bundle with --path, like the following:
bundle --deployment --path vendor/bundle
gem uninstall unicorn --version 4.5.0
When you run bundler, it remembers the settings. I painfully discovered this regarding the --without switch. The --path setting will tell gem to use the local vendor/bundle directory as your local gem source. Remember to set the path back by running bundle again.
I'm pretty new to Ruby/Rails but I was taking a look at bundler and was wondering how it works exactly. Do you install a full set of gems like normal gem install XYZand then use the Gemfile to pull a certain subset of those gems for use with a specific application? Or do you not install gems normally anymore and just include them in the Gemfile and then do a bundle install to include them all in a bundle that is then used with your application?
Thank you so much for taking the time to answer this, I'm just a little confused on what bundler's functionality is exactly.
-- MAP
These two links explain everything about bundler.
How does bundler bundle
How does bundle require gems
Think of bundler as a package management tool.
From bundle help command:
bundle install # Install the current environment to the system
bundle package # Locks and then caches all of the gems into vendor/cache
So bundle install command will install all gems to the system that are listed in Gemfile as well as their dependencies. If the gem was not previously installed it will grab it from the gemcutter repo. bundle package will cache the .gem files into your apps vendor/cache directory.
No need to run gem install first.