Replace Travis with CircleCI and add Ruby 3.0 and 3.1 to CI matrix

.circleci/config.yml

@@ -0,0 +1,132 @@
+version: 2.1
+
+executors:
+  ruby:
+    parameters:
+      version:
+        description: "Ruby version number"
+        default: "3.1"
+        type: string
+    docker:
+      - image: ruby:<< parameters.version >>
+
+commands:
+  bundle_install:
+    description: Install Ruby dependencies with Bundler
+    parameters:
+      key:
+        description: "Cache key"
+        default: "3.1"
+        type: string
+    steps:
+      - restore_cache:
+          keys:
+            - bundle-v1-{{ arch }}-<< parameters.key >>
+      - run:
+          name: Install Ruby Dependencies
+          command: |
+            gem install bundler --conservative --no-document || \
+              gem install rubygems-update -v '<3' && update_rubygems && gem install bundler -v '<2' --no-document
+            bundle config --local path vendor/bundle
+            bundle check || (bundle install --jobs=4 --retry=3 && bundle clean)
+      - save_cache:
+          paths:
+            - ./vendor/bundle
+          key: bundle-v1-{{ arch }}-<< parameters.key >>-{{ checksum "Gemfile.lock" }}
+
+jobs:
+  rubocop:
+    executor:
+      name: ruby
+      version: "2.7"
+    steps:
+      - checkout
+      - bundle_install:
+          key: "2.7"
+      - run: bundle exec rubocop
+  spec:
+    parameters:
+      ruby:
+        description: "Ruby version number"
+        default: "3.1"
+        type: string
+    executor:
+      name: ruby
+      version: << parameters.ruby >>
+    steps:
+      - checkout
+      - run: echo sshkit=master >> $BASH_ENV
+      - bundle_install:
+          key: << parameters.ruby >>
+      - run: bundle exec rake test
+  spec_legacy_ruby:
+    parameters:
+      ruby:
+        description: "Ruby version number"
+        default: "1.9"
+        type: string
+      sshkit:
+        description: "sshkit version number"
+        default: "1.6.1"
+        type: string
+    executor:
+      name: ruby
+      version: << parameters.ruby >>
+    steps:
+      - checkout
+      - run: |
+          echo "export sshkit=<< parameters.sshkit >>" >> $BASH_ENV
+          if [ "<< parameters.ruby >>" == "1.9" ]; then
+           echo "export RUBYOPT=-Ku" >> $BASH_ENV
+          fi
+      - bundle_install:
+          key: << parameters.ruby >>-<< parameters.sshkit >>
+      - run: bundle exec rake test
+
+workflows:
+  version: 2
+  commit-workflow:
+    jobs:
+      - rubocop
+      - spec:
+          matrix: &matrix
+            parameters:
+              ruby:
+                - "2.4"
+                - "2.5"
+                - "2.6"
+                - "2.7"
+                - "3.0"
+                - "3.1"
+      - spec_legacy_ruby:
+          matrix: &legacy_ruby_matrix
+            parameters:
+              ruby:
+                - "1.9"
+                - "2.0"
+                - "2.1"
+                - "2.2"
+                - "2.3"
+              sshkit:
+                - "1.6.1"
+                - "1.7.1"
+                - master
+            exclude:
+              - ruby: "1.9"
+                sshkit: master
+  cron-workflow:
+    jobs:
+      - rubocop
+      - spec:
+          matrix:
+            <<: *matrix
+      - spec_legacy_ruby:
+          matrix:
+            <<: *legacy_ruby_matrix
+    triggers:
+      - schedule:
+          cron: "0 13 * * 6"
+          filters:
+            branches:
+              only:
+                - master

CONTRIBUTING.md

@@ -19,7 +19,7 @@ Note that Bundler 1.10 is required for development. Run `gem update bundler` to
 
 After checking out the airbrussh repo, run `bin/setup` to install dependencies. Run `rake` to execute airbrussh's tests and RuboCop checks.
 
-Airbrussh is designed to work against multiple versions of SSHKit and Ruby. In order to test this, we use the environment variable `sshkit` in order to run the tests against a specific version. The combinations of sshkit and ruby we support are specified in [.travis.yml](.travis.yml). To test all the versions locally, there is a `test_all.rb` bin file. This installs the gems and runs the tests for each sshkit version in [.travis.yml](.travis.yml). *Note: this will update your `Gemfile.lock` as each SSHKit gem version is installed. The gem version is restored to the default when the script exits.*
+Airbrussh is designed to work against multiple versions of SSHKit and Ruby. In order to test this, we use the environment variable `sshkit` in order to run the tests against a specific version. The combinations of sshkit and ruby we support are specified in [.circleci/config.yml](.circleci/config.yml).
 
 A Guardfile is also present, so if you'd like to use Guard to do a TDD workflow, then:
 

Gemfile

@@ -6,6 +6,7 @@ gemspec
 if RUBY_VERSION == "1.9.3"
   # These gems need specific version for Ruby 1.9
   gem "json", "~> 1.8"
+  gem "minitest", "~> 5.11.3"
   gem "net-ssh", "~> 2.8"
   gem "rake", "< 12.3"
   gem "term-ansicolor", "~> 1.3.2"
@@ -40,7 +41,7 @@ if (sshkit_version = ENV["sshkit"])
       else
         ["capistrano", sshkit_version]
       end
-    { :github => "#{user}/sshkit", :branch => branch }
+    { :git => "https://github.com/#{user}/sshkit.git", :branch => branch }
   end
   gem "sshkit", requirement
 end

README.md

@@ -1,7 +1,7 @@
 # Airbrussh
 
 [![Gem Version](https://badge.fury.io/rb/airbrussh.svg)](http://badge.fury.io/rb/airbrussh)
-[![Build Status](https://travis-ci.org/mattbrictson/airbrussh.svg?branch=master)](https://travis-ci.org/mattbrictson/airbrussh)
+[![Build Status](https://circleci.com/gh/mattbrictson/airbrussh/tree/master.svg?style=shield)](https://app.circleci.com/pipelines/github/mattbrictson/airbrussh?branch=master)
 [![Build status](https://ci.appveyor.com/api/projects/status/h052rlq54sne3md6/branch/master?svg=true)](https://ci.appveyor.com/project/mattbrictson/airbrussh/branch/master)
 [![Code Climate](https://codeclimate.com/github/mattbrictson/airbrussh/badges/gpa.svg)](https://codeclimate.com/github/mattbrictson/airbrussh)
 [![Coverage Status](https://coveralls.io/repos/mattbrictson/airbrussh/badge.svg?branch=master)](https://coveralls.io/r/mattbrictson/airbrussh?branch=master)

airbrussh.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "sshkit", [">= 1.6.1", "!= 1.7.0"]
 
-  spec.add_development_dependency "bundler", "~> 1.17"
+  spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake", "~> 12.0"
   spec.add_development_dependency "minitest", "~> 5.10"
   spec.add_development_dependency "minitest-reporters", "~> 1.1"

test/support/coveralls.rb

@@ -1,4 +1,4 @@
-if ENV["TRAVIS"] && RUBY_VERSION >= "2.1"
+if ENV["CI"] && RUBY_VERSION >= "2.1"
   require "simplecov"
   require "coveralls"