Make gli an optional dependency

CHANGELOG.md

@@ -1,5 +1,6 @@
-### 3.2.1 (Next)
+### 3.3.0 (Next)
 
+* [#602](https://github.com/slack-ruby/slack-ruby-client/pull/602): Make gli an optional dependency; only the `slack` command-line client needs it - [@corsonknowles](https://github.com/corsonknowles).
 * [#591](https://github.com/slack-ruby/slack-ruby-client/pull/591): Generate AI CHANGELOG entries and PR summaries for automated API update PRs, lock simplecov below 1.1.0 to avoid breaking Coveralls - [@dblock](https://github.com/dblock).
 * [#590](https://github.com/slack-ruby/slack-ruby-client/pull/590): Add entity.acknowledgeCommentAction and entity.presentComments methods - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).
 * [#590](https://github.com/slack-ruby/slack-ruby-client/pull/590): Add admin.apps.mcpServers, admin.apps.mcpServers.permissions, and admin.apps.permissions endpoints - [@slack-ruby-ci-bot](https://github.com/apps/slack-ruby-ci-bot).

Gemfile

@@ -12,6 +12,7 @@ group :test do
   gem 'danger-toc', require: false
   gem 'erubis'
   gem 'faraday-typhoeus'
+  gem 'gli'
   gem 'json-schema'
   gem 'mutex_m'
   gem 'racc'

README.md

@@ -562,7 +562,13 @@ Slack::Messages::Formatting.escape('Hello & <world>')
 
 ### Command-Line Client
 
-The slack command-line client returns JSON data from the Slack API.
+The slack command-line client returns JSON data from the Slack API. It uses [GLI](https://github.com/davetron5000/gli), which is not a dependency of slack-ruby-client, so install it alongside the client.
+
+```
+gem install gli
+```
+
+Or add `gem 'gli'` to your Gemfile.
 
 #### Authenticate with Slack
 

UPGRADING.md

@@ -1,6 +1,10 @@
 Upgrading Slack-Ruby-Client
 ===========================
 
+### Upgrading to >= 3.3.0
+
+[#602](https://github.com/slack-ruby/slack-ruby-client/pull/602) removes [gli](https://github.com/davetron5000/gli) from slack-ruby-client's runtime dependencies. Only the `slack` command-line client uses it. If you use the command-line client, add `gem 'gli'` to your Gemfile or run `gem install gli`. Without it, `slack` exits with a message saying so. The library itself is unaffected.
+
 ### Upgrading to >= 3.2.0
 
 [#583](https://github.com/slack-ruby/slack-ruby-client/pull/583) modifies the error types raised when a nonexistent #channel-name or @user-handle is looked up. These will now raise `ChannelNotFound` and `UserNotFound` respectively, whereas they previously raised a `SlackError`. If your code relies on these types without accounting for inheritance, it will need to be migrated. Notably, `rescue SlackError` will continue to work as normal, since both error classes inherit from it.

bin/slack

@@ -1,5 +1,9 @@
 #!/usr/bin/env ruby
-require 'gli'
+begin
+  require 'gli'
+rescue LoadError
+  abort "The slack command-line client requires the gli gem. Add `gem 'gli'` to your Gemfile, or run `gem install gli`."
+end
 require 'slack_ruby_client'
 
 module Slack

lib/slack/version.rb

@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module Slack
-  VERSION = '3.2.1'
+  VERSION = '3.3.0'
 end

slack-ruby-client.gemspec

@@ -20,7 +20,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'faraday', '>= 2.0.1'
   s.add_dependency 'faraday-mashify'
   s.add_dependency 'faraday-multipart'
-  s.add_dependency 'gli'
   s.add_dependency 'hashie'
   s.add_dependency 'logger'
   s.metadata['rubygems_mfa_required'] = 'true'

spec/slack/slack_spec.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 require 'spec_helper'
+require 'open3'
 
 describe Slack do
   let(:slack) { File.expand_path(File.join(__FILE__, '../../../bin/slack')) }
@@ -19,6 +20,17 @@
     end
   end
 
+  context 'without gli installed' do
+    # --disable-gems (and no inherited bundler setup) leaves gli unloadable on every Ruby.
+    let(:env) { { 'RUBYOPT' => nil, 'RUBYLIB' => nil, 'BUNDLE_GEMFILE' => nil, 'BUNDLE_BIN_PATH' => nil } }
+
+    it 'exits with instructions to install it' do
+      output, status = Open3.capture2e(env, RbConfig.ruby, '--disable-gems', slack, 'help')
+      expect(status.exitstatus).to eq 1
+      expect(output).to include "The slack command-line client requires the gli gem. Add `gem 'gli'` to your Gemfile"
+    end
+  end
+
   context 'globals' do
     let(:command) do
       "\"#{slack}\" --vcr-cassette-name=web/auth_test_success " \