Remove Brewfile.lock.json generation.

This was originally added to faciliate later functionality from other
maintainers that never materialized.

I've never heard anyone say this was useful and a lot of people have
complained that it's useless or annoying.

.gitignore

@@ -2,6 +2,5 @@
 .vscode
 
 Brewfile
-Brewfile.lock.json
 Gemfile.lock
 coverage

README.md

@@ -71,10 +71,6 @@ vscode "GitHub.codespaces"
 Homebrew is a [rolling release](https://en.wikipedia.org/wiki/Rolling_release) package manager so it does not support installing arbitrary older versions of software.
 If your software needs specific pinned versions, consider [`whalebrew`](https://github.com/whalebrew/whalebrew) lines in your `Brewfile` to install [Docker](https://www.docker.com) containers.
 
-After a successful `brew bundle` run, it creates a `Brewfile.lock.json` to record the environment. If a future `brew bundle` run fails, you can check the differences between `Brewfile.lock.json` to debug. As it can contain local environment information that varies between systems, it's not worth committing to version control on multi-user repositories.
-
-Disable generation of the `Brewfile.lock.json` file by setting the environment variable with `export HOMEBREW_BUNDLE_NO_LOCK=1` or by using the command-line argument `brew bundle --no-lock`.
-
 ## New Installers/Checkers/Dumpers
 
 `brew bundle` currently supports Homebrew, Homebrew Cask, Mac App Store, Whalebrew and Visual Studio Code.

cmd/bundle.rb

@@ -28,8 +28,6 @@ class BundleCmd < AbstractCommand
 
           You can skip the installation of dependencies by adding space-separated values to one or more of the following environment variables: `HOMEBREW_BUNDLE_BREW_SKIP`, `HOMEBREW_BUNDLE_CASK_SKIP`, `HOMEBREW_BUNDLE_MAS_SKIP`, `HOMEBREW_BUNDLE_WHALEBREW_SKIP`, `HOMEBREW_BUNDLE_TAP_SKIP`.
 
-          `brew bundle` will output a `Brewfile.lock.json` in the same directory as the `Brewfile` if all dependencies are installed successfully. This contains dependency and system status information which can be useful for debugging `brew bundle` failures and replicating a "last known good build" state. You can opt-out of this behaviour by setting the `HOMEBREW_BUNDLE_NO_LOCK` environment variable or passing the `--no-lock` option. You may wish to check this file into the same version control system as your `Brewfile` (or ensure your version control system ignores it if you'd prefer to rely on debugging information from a local machine).
-
           `brew bundle dump`:
           Write all installed casks/formulae/images/taps into a `Brewfile` in the current directory.
 
@@ -76,7 +74,8 @@ class BundleCmd < AbstractCommand
                             "This is enabled by default if `HOMEBREW_BUNDLE_INSTALL_CLEANUP` is set and " \
                             "`--global` is passed."
         switch "--no-lock",
-               description: "`install` does not output a `Brewfile.lock.json`."
+               description: "no-op since `Brewfile.lock.json` was removed.",
+               hidden:      true
         switch "--all",
                description: "`list` all dependencies."
         switch "--formula", "--brews",

lib/bundle.rb

@@ -24,7 +24,6 @@
 require "bundle/dumper"
 require "bundle/installer"
 require "bundle/lister"
-require "bundle/locker"
 require "bundle/commands/install"
 require "bundle/commands/dump"
 require "bundle/commands/cleanup"

lib/bundle/cask_dumper.rb

@@ -30,14 +30,6 @@ def cask_is_outdated_using_greedy?(cask_name)
       cask.outdated?(greedy: true)
     end
 
-    def cask_versions
-      return {} unless Bundle.cask_installed?
-
-      casks.each_with_object({}) do |cask, name_versions|
-        name_versions[cask.to_s] = cask.version
-      end
-    end
-
     def dump(describe: false)
       casks.map do |cask|
         description = "# #{cask.desc}\n" if describe && cask.desc.present?

lib/bundle/installer.rb

@@ -59,14 +59,9 @@ def install(entries, global: false, file: nil, no_lock: false, no_upgrade: false
       unless failure.zero?
         puts Formatter.error "Homebrew Bundle failed! " \
                              "#{failure} Brewfile #{Bundle::Dsl.pluralize_dependency(failure)} failed to install."
-        if (lock = Bundle::Locker.lockfile(global:, file:)) && lock.exist?
-          puts Formatter.error("Check for differences in your #{lock.basename}!")
-        end
         return false
       end
 
-      Bundle::Locker.lock(entries, global:, file:, no_lock:)
-
       puts Formatter.success "Homebrew Bundle complete! " \
                              "#{success} Brewfile #{Bundle::Dsl.pluralize_dependency(success)} now installed."
       true

spec/bundle/commands/install_command_spec.rb

@@ -5,7 +5,6 @@
 describe Bundle::Commands::Install do
   before do
     allow_any_instance_of(IO).to receive(:puts)
-    allow(Bundle::Locker).to receive(:write_lockfile?).and_return(false)
   end
 
   context "when a Brewfile is not found" do
@@ -66,7 +65,6 @@
       allow(Bundle::TapInstaller).to receive_messages(preinstall: true, install: false)
       allow(Bundle::WhalebrewInstaller).to receive_messages(preinstall: true, install: false)
       allow(Bundle::VscodeExtensionInstaller).to receive_messages(preinstall: true, install: false)
-      allow(Bundle::Locker).to receive(:lockfile).and_return(Pathname(__dir__))
       allow_any_instance_of(Pathname).to receive(:read).and_return(brewfile_contents)
 
       expect { described_class.run }.to raise_error(SystemExit)