Make UrlConfig a subclass of HashConfig

A `UrlConfig` is a `HashConfig` that mixes in connection information
based on a `url` passed from the constructor.

Previously, for each new property we wanted to introduce an accessor
for, we'd need to write an implementation for `HashConfig` _and_ for
`UrlConfig`.

Now we make `UrlConfig` descend from `HashConfig` so we can write a
single implementation for both cases.

Also while we're in here, take the `adapter` implementation into
`HashConfig` so that `DatabaseConfig` isn't making any assumptions about
the structure of its subclasses.
Co-authored-by: Neileencodes <eileencodes@gmail.com>

Remove UrlConfig#url_config?

Resolve Hash with `url` key as a `UrlConfig`

This private method is only used in one place, to check whether an
object we have is an instance of `UrlConfig`.

Instead we can just check that we have the right type of object

In `DatabaseConfigurations#configs_for`, `Hash` configs that contain a
`:url` key resolve to a `UrlConfig`.  Since we weren't mirroring that behavior
in `Resolver`, we had to add explicit handling for `url` keys to the
`HashConfig` implementation.

Now we're going to always resolve these hashes as `UrlConfig` and can
remove the extra implementation of URL handling from `HashConfig`.

Of course, this does introduce some duplication between
`DatabaseConfigurations` and `Resolver` which we plan to address in a
future PR.
Co-authored-by: Neileencodes <eileencodes@gmail.com>

Renamed `assert_broadcasts_on` to `assert_broadcast_on` in documentation string [ci skip]

correct `assert_broadcast_on` to close #37272

* Add missing OS dependency

Otherwise the `libxml-ruby` gem does not install in ubuntu and `bundle install`
errors out with the following error:

```
Fetching libxml-ruby 3.1.0
Installing libxml-ruby 3.1.0 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/libxml-ruby-3.1.0/ext/libxml
/home/deivid/.rbenv/versions/2.6.4/bin/ruby -I /home/deivid/.rbenv/versions/2.6.4/lib/ruby/site_ruby/2.6.0 -r ./siteconf20190921-8482-194nrkq.rb extconf.rb
/home/deivid/.rbenv/versions/2.6.4/bin/ruby: warning: shebang line ending with \r may cause problems
checking for libxml/xmlversion.h in /opt/include/libxml2,/opt/local/include/libxml2,/usr/local/include/libxml2,/usr/include/libxml2... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/deivid/.rbenv/versions/2.6.4/bin/$(RUBY_BASE_NAME)
	--with-xml2-config
	--without-xml2-config
	--with-xml2-dir
	--without-xml2-dir
	--with-xml2-include
	--without-xml2-include=${xml2-dir}/include
	--with-xml2-lib
	--without-xml2-lib=${xml2-dir}/lib
 extconf failure: need libxml2.

    Install the library or try one of the following options to extconf.rb:

      --with-xml2-config=/path/to/xml2-config
      --with-xml2-dir=/path/to/libxml2
      --with-xml2-lib=/path/to/libxml2/lib
      --with-xml2-include=/path/to/libxml2/include

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0-static/libxml-ruby-3.1.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/libxml-ruby-3.1.0 for inspection.
Results logged to /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/extensions/x86_64-linux/2.6.0-static/libxml-ruby-3.1.0/gem_make.out

An error occurred while installing libxml-ruby (3.1.0), and Bundler cannot continue.
Make sure that `gem install libxml-ruby -v '3.1.0' --source 'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  libxml-ruby
```

* Add missing libxml2 dependency to remaining platforms

Reduce stat(2) calls

`File.file?` and other predicates for permissions can use same
stat(2) call result.

Update for `Time#inspect`

Since ruby/ruby@5208c431be, `Time#inspect` is separated from
`Time#to_s`, and the former may contain the fraction part now.

Don't load environment in rake command

Prefer one liners OS requirement install commands

I was getting some problems when running `bundle install` on a fresh
clone. It was due to some extension building errors that usually point
out to missing OS dependencies.

So I run "rg apt-get" hoping to find some suggestion to install
requirements for my OS. However, the result was misleading, because
dependencies are split across several lines, so I missed many of them.

I think a one liner is better and it's also slightly easier to
copy-paste.

Fix issues with ActiveSupport Range extensions on boundless Ranges

Closes #37177

While generating an application with the `--skip-webpack-install` flag,
and then running `rails -h` on the generated application, I got the
crash listed below.

I was suprised that Rails would load the full application environment
just for the help command, so I located where the environment was being
loaded and stopped loading it.

It fixed the error and didn't break any tests, so it's probably not
necessary?

This is the backtrace for the error:

```
$ rails -h
The most common rails commands are:
 generate     Generate new code (short-cut alias: "g")
 console      Start the Rails console (short-cut alias: "c")
 server       Start the Rails server (short-cut alias: "s")
 test         Run tests except system tests (short-cut alias: "t")
 test:system  Run system tests
 dbconsole    Start a console for the database specified in config/database.yml
              (short-cut alias: "db")

 new          Create a new Rails application. "rails new my_app" creates a
              new application called MyApp in "./my_app"

All commands can be run with -h (or --help) for more information.
In addition to those commands, there are:

RAILS_ENV=development environment is not defined in config/webpacker.yml, falling back to production environment
Traceback (most recent call last):
	74: from bin/rails:3:in `<main>'
	73: from bin/rails:3:in `load'
	72: from /home/deivid/Code/playground/testapp/bin/spring:15:in `<top (required)>'
	71: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	70: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	69: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `<top (required)>'
	68: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `load'
	67: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/bin/spring:49:in `<top (required)>'
	66: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client.rb:30:in `run'
	65: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/command.rb:7:in `call'
	64: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `call'
	63: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `load'
	62: from /home/deivid/Code/playground/testapp/bin/rails:9:in `<top (required)>'
	61: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `require'
	60: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:291:in `load_dependency'
	59: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `block in require'
	58: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
	57: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
	56: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
	55: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
	54: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
	53: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands.rb:18:in `<main>'
	52: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:46:in `invoke'
	51: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/base.rb:65:in `perform'
	50: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
	49: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
	48: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
	47: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/help/help_command.rb:11:in `help'
	46: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:86:in `print_commands'
	45: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `commands'
	44: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `flat_map'
	43: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `each'
	42: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:12:in `printing_commands'
	41: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:42:in `formatted_rake_tasks'
	40: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:33:in `rake_tasks'
	39: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/actions.rb:15:in `require_application_and_environment!'
	38: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/actions.rb:28:in `require_environment!'
	37: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application.rb:339:in `require_environment!'
	36: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `require'
	35: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:291:in `load_dependency'
	34: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `block in require'
	33: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/zeitwerk-2.1.10/lib/zeitwerk/kernel.rb:23:in `require'
	32: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
	31: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
	30: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
	29: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
	28: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
	27: from /home/deivid/Code/playground/testapp/config/environment.rb:5:in `<main>'
	26: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application.rb:363:in `initialize!'
	25: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:60:in `run_initializers'
	24: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
	23: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
	22: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
	21: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `call'
	20: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `each'
	19: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
	18: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
	17: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
	16: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
	15: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:61:in `block in run_initializers'
	14: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:in `run'
	13: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:in `instance_exec'
	12: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/railtie.rb:84:in `block in <class:Engine>'
	11: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker.rb:27:in `bootstrap'
	10: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/commands.rb:14:in `bootstrap'
	 9: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:18:in `refresh'
	 8: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:83:in `load'
	 7: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:47:in `public_manifest_path'
	 6: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:43:in `public_output_path'
	 5: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:39:in `public_path'
	 4: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:80:in `fetch'
	 3: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:84:in `data'
	 2: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:88:in `load'
	 1: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:88:in `read'
/home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:88:in `read': No such file or directory @ rb_sysopen - /home/deivid/Code/playground/testapp/config/webpacker.yml (Errno::ENOENT)
	73: from bin/rails:3:in `<main>'
	72: from bin/rails:3:in `load'
	71: from /home/deivid/Code/playground/testapp/bin/spring:15:in `<top (required)>'
	70: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	69: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	68: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `<top (required)>'
	67: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `load'
	66: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/bin/spring:49:in `<top (required)>'
	65: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client.rb:30:in `run'
	64: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/command.rb:7:in `call'
	63: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `call'
	62: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `load'
	61: from /home/deivid/Code/playground/testapp/bin/rails:9:in `<top (required)>'
	60: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `require'
	59: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:291:in `load_dependency'
	58: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `block in require'
	57: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
	56: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
	55: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
	54: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
	53: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
	52: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands.rb:18:in `<main>'
	51: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:46:in `invoke'
	50: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/base.rb:65:in `perform'
	49: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
	48: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
	47: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
	46: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/help/help_command.rb:11:in `help'
	45: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:86:in `print_commands'
	44: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `commands'
	43: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `flat_map'
	42: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command.rb:96:in `each'
	41: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:12:in `printing_commands'
	40: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:42:in `formatted_rake_tasks'
	39: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/commands/rake/rake_command.rb:33:in `rake_tasks'
	38: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/actions.rb:15:in `require_application_and_environment!'
	37: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/command/actions.rb:28:in `require_environment!'
	36: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application.rb:339:in `require_environment!'
	35: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `require'
	34: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:291:in `load_dependency'
	33: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/dependencies.rb:325:in `block in require'
	32: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/zeitwerk-2.1.10/lib/zeitwerk/kernel.rb:23:in `require'
	31: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
	30: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require_with_bootsnap_lfi'
	29: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
	28: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `block in require_with_bootsnap_lfi'
	27: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.5/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require'
	26: from /home/deivid/Code/playground/testapp/config/environment.rb:5:in `<main>'
	25: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application.rb:363:in `initialize!'
	24: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:60:in `run_initializers'
	23: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
	22: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
	21: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
	20: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `call'
	19: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:347:in `each'
	18: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
	17: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
	16: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
	15: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
	14: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:61:in `block in run_initializers'
	13: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:in `run'
	12: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/initializable.rb:32:in `instance_exec'
	11: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/railtie.rb:84:in `block in <class:Engine>'
	10: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker.rb:27:in `bootstrap'
	 9: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/commands.rb:14:in `bootstrap'
	 8: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:18:in `refresh'
	 7: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/manifest.rb:83:in `load'
	 6: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:47:in `public_manifest_path'
	 5: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:43:in `public_output_path'
	 4: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:39:in `public_path'
	 3: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:80:in `fetch'
	 2: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:84:in `data'
	 1: from /home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:87:in `load'
/home/deivid/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/configuration.rb:91:in `rescue in load': Webpacker configuration file not found /home/deivid/Code/playground/testapp/config/webpacker.yml. Please run rails webpacker:install Error: No such file or directory @ rb_sysopen - /home/deivid/Code/playground/testapp/config/webpacker.yml (RuntimeError)
```

Rollback in `after_commit` should not rollback state that already been succeeded

Rollback in `after_commit` accidentally rollback state that already been
succeeded in the previous commit.

To fix this problem, remaining transaction state should immediately be
cleared after a transaction is committed before `after_commit` callbacks
are invoked.

Fixes #37152.

Since #36303 we allow to ignore specific fixtures from being loaded, but
because that introduced a new fixture `other_books` that uses the same
underlying model `Book`, sometimes depending on the run order the tests
might end up not loading the actual `books` fixtures thinking they are
already cached/loaded. Disabling the transactional fixtures for that
test that was introduced above for the ignore fixtures feature fixes
that.

Closes #37244.
Closes #37245.
Thanks @yahonda for finding a way to reproduce these failures.

`ActionView::Helpers::FormOptionsHelper#select` should mark option for `nil` as selected

We have an internal engine whose models, for backwards compatibility with older Rails versions, override #connection_specification_name to connect to a shared DB rather than using Rails 6 multi-DB support.

b8fc0150 changed ActiveRecord::ConnectionAdapters::ConnectionPool#retrieve_connection_pool to pass ActiveRecord::DatabaseConfigurations::DatabaseConfig#config_hash to #establish_connection where it previously passed ActiveRecord::ConnectionAdapters::ConnectionSpecification#to_hash. But DatabaseConfig#config_hash does not include the specification name, so #establish_connection falls back to `"primary"`. The host app's primary DB connections and our engine's shared DB connections get mixed in the same pool as a result. Engine models will sometimes erroneously check out app DB connections and app models will sometimes check out engine DB connections.

To fix, we merge the connection specification name into the DB config hash before passing it into ConnectionPool#establish_connection.

Allow DESCRIBE queries on read-only connections

Add a CHANGELOG entry for to_h deprecation

We deprecated `to_h` in https://github.com/rails/rails/pull/37231, and
this commit adds the appropriate `CHANGELOG` entry!

Make DatabaseTasks use DatabaseConfig objects

Deprecate `to_h` and `to_legacy_hash`

Deprecate `current_config` and `current_config=`

We're moving in the direction of getting `DatabaseConfig` to be used in
more places instead of `Hash` connections configurations being passed
around directly.

Here we're making all of `DatabaseTasks` and `databases.rake` use
database configuration objects.

A few notes:

* This also contains some tests that were missing for public methods on
  `DatabaseTasks`: `charset_current` & `collation_current`

* There is a deprecation of some arguments in `schema_up_to_date?` that
  are now duplicative/confusing. One of them wasn't used previously
  (`environment`), and now `spec_name` can be pulled directly off of the
  `db_config (DatatabaseConfig)` object.
Co-authored-by: Neileencodes <eileencodes@gmail.com>

Maintain eager loading joining order as before

If a relation has eager_load and string joins only, string joins will be
regarded as leading joins unlike before, due to #36805.

To maintain that joining order as before, check eager loading join
first before string joins.

Fixes #37133.

Allow ActionDispatch::Response to be autoloaded