Use reline

.github/workflows/daily.yml

@@ -8,13 +8,12 @@ on:
 
 jobs:
   build_head_images:
-    container: deividrodriguez/byebug:2.7.0-readline-gcc
+    container: deividrodriguez/byebug:2.7.0-gcc
 
     runs-on: ubuntu-18.04
 
     strategy:
       matrix:
-        line_editor: [libedit, readline]
         compiler: [clang, gcc]
 
     steps:
@@ -30,7 +29,7 @@ jobs:
         run: bin/setup.sh
 
       - name: Build and push docker image
-        run: bin/rake docker:build_and_push_head[${{ matrix.line_editor }},${{ matrix.compiler }}]
+        run: bin/rake docker:build_and_push_head[${{ matrix.compiler }}]
         env:
           DOCKER_USER: ${{ secrets.DOCKER_USER }}
           DOCKER_PASS: ${{ secrets.DOCKER_PASS }}

.github/workflows/ubuntu.yml

@@ -11,14 +11,13 @@ on:
 
 jobs:
   test:
-    container: deividrodriguez/byebug:${{ matrix.version }}-${{ matrix.line_editor }}-${{ matrix.compiler }}
+    container: deividrodriguez/byebug:${{ matrix.version }}-${{ matrix.compiler }}
 
     runs-on: ubuntu-18.04
 
     strategy:
       matrix:
-        version: [2.4.9, 2.5.7, 2.6.5, 2.7.0, head]
-        line_editor: [libedit, readline]
+        version: [2.5.7, 2.6.5, 2.7.0, head]
         compiler: [clang, gcc]
 
     steps:
@@ -43,17 +42,17 @@ jobs:
         if: github.event_name == 'push'
 
       - name: Save coverage
-        run: cc-test-reporter format-coverage --output coverage/codeclimate.${{ matrix.version }}-${{ matrix.line_editor }}-${{ matrix.compiler }}.json
+        run: cc-test-reporter format-coverage --output coverage/codeclimate.${{ matrix.version }}-${{ matrix.compiler }}.json
 
       - uses: actions/upload-artifact@v1
         with:
-          name: coverage-${{ matrix.version }}-${{ matrix.line_editor }}-${{ matrix.compiler }}
-          path: coverage/codeclimate.${{ matrix.version }}-${{ matrix.line_editor }}-${{ matrix.compiler }}.json
+          name: coverage-${{ matrix.version }}-${{ matrix.compiler }}
+          path: coverage/codeclimate.${{ matrix.version }}-${{ matrix.compiler }}.json
 
     timeout-minutes: 15
 
   coverage:
-    container: deividrodriguez/byebug:2.7.0-readline-gcc
+    container: deividrodriguez/byebug:2.7.0-gcc
 
     runs-on: ubuntu-18.04
 
@@ -65,82 +64,32 @@ jobs:
     steps:
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.4.9-libedit-clang
+          name: coverage-2.5.7-clang
           path: coverage
 
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.4.9-libedit-gcc
+          name: coverage-2.5.7-gcc
           path: coverage
 
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.4.9-readline-clang
+          name: coverage-2.6.5-clang
           path: coverage
 
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.4.9-readline-gcc
+          name: coverage-2.6.5-gcc
           path: coverage
 
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.5.7-libedit-clang
+          name: coverage-2.7.0-clang
           path: coverage
 
       - uses: actions/download-artifact@v1
         with:
-          name: coverage-2.5.7-libedit-gcc
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.5.7-readline-clang
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.5.7-readline-gcc
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.6.5-libedit-clang
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.6.5-libedit-gcc
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.6.5-readline-clang
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.6.5-readline-gcc
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.7.0-libedit-clang
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.7.0-libedit-gcc
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.7.0-readline-clang
-          path: coverage
-
-      - uses: actions/download-artifact@v1
-        with:
-          name: coverage-2.7.0-readline-gcc
+          name: coverage-2.7.0-gcc
           path: coverage
 
       - name: Aggregate & upload results to Code Climate

.rubocop.yml

@@ -12,7 +12,7 @@ AllCops:
 
   DisabledByDefault: true
 
-  TargetRubyVersion: 2.4
+  TargetRubyVersion: 2.5
 
 Layout/AccessModifierIndentation:
   Enabled: true

CHANGELOG.md

@@ -8,6 +8,14 @@
 
 * [#635](https://github.com/deivid-rodriguez/byebug/pull/635): usage on Fedora 31 or any other `byebug` installation performed by a `rubygems` copy customized by setting `Gem.install_extension_in_lib` to false.
 
+### Changed
+
+* [#615](https://github.com/deivid-rodriguez/byebug/pull/615): Byebug now uses a [pure ruby readline implementation](https://github.com/ruby/reline).
+
+### Removed
+
+* Support for MRI 2.4. Byebug no longer installs on this platform.
+
 ## [11.1.0] - 2020-01-20
 
 ### Added

Gemfile.lock

@@ -2,6 +2,7 @@ PATH
   remote: .
   specs:
     byebug (11.1.1)
+      reline (>= 0.1.2)
 
 GEM
   remote: https://rubygems.org/
@@ -16,6 +17,7 @@ GEM
     docile (1.3.2)
     faraday (1.0.0)
       multipart-post (>= 1.2, < 3)
+    io-console (0.5.5)
     jaro_winkler (1.5.4)
     json (2.3.0)
     kramdown (2.1.0)
@@ -47,6 +49,8 @@ GEM
     rake (13.0.1)
     rake-compiler (1.1.0)
       rake
+    reline (0.1.2)
+      io-console (~> 0.5)
     rexml (3.2.3)
     rubocop (0.79.0)
       jaro_winkler (~> 1.5.1)

README.md

@@ -48,7 +48,7 @@ Windows [![Vey][vey]][vey_url]
 
 ## Requirements
 
-* _Required_: MRI 2.4.0 or higher.
+* _Required_: MRI 2.5.0 or higher.
 * _Recommended_: MRI 2.6.4 or higher (MRI 2.6.0 to 2.6.3 contain a regression
   causing unbalanced call/return events in some cases, breaking the `next` command).
 

Rakefile

@@ -16,11 +16,9 @@ task "release:rubygem_push" => "chandler:push"
 if Gem.win_platform?
   desc "Activates DevKit"
   task :devkit do
-    begin
-      require "devkit"
-    rescue LoadError
-      abort "Failed to load DevKit required for compilation"
-    end
+    require "devkit"
+  rescue LoadError
+    abort "Failed to load DevKit required for compilation"
   end
 
   task compile: :devkit
@@ -107,10 +105,9 @@ namespace :docker do
   end
 
   desc "Build a ruby trunk image"
-  task :build_and_push_head, %i[line_editor compiler] do |_t, opts|
+  task :build_and_push_head, %i[compiler] do |_t, opts|
     manager = Docker::Manager.new(
       version: "head",
-      line_editor: opts[:line_editor],
       compiler: opts[:compiler]
     )
 

appveyor.yml

@@ -9,16 +9,6 @@ install:
         cmd /c ruby-setup.exe /verysilent /dir=C:/Ruby$env:ruby_version
       }
 
-  - git clone -q --depth=5  --no-tags --branch=byebug https://github.com/MSP-greg/rb-readline.git C:\rb-readline
-
-  - ps: $env:ruby_abi_vers = (&ruby.exe -e "puts RbConfig::CONFIG['ruby_version']" | Out-String).Trim()
-  - set n_dir=C:\Ruby%ruby_version%\lib\ruby\site_ruby\%ruby_abi_vers%
-  - attrib.exe -r %n_dir%\*.rb
-  - del /q %n_dir%\readline.rb
-  - del /q %n_dir%\rbreadline.rb
-  - copy C:\rb-readline\lib\readline.rb %n_dir%\readline.rb
-  - copy C:\rb-readline\lib\rbreadline.rb %n_dir%\rbreadline.rb
-
   - echo %PATH%
 
   - ruby --version
@@ -38,7 +28,6 @@ test_script:
 
 environment:
   matrix:
-    - ruby_version: 24-x64
     - ruby_version: 25-x64
     - ruby_version: 26-x64
     - ruby_version: head-x64

byebug.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
     can build on. It provides breakpoint handling and bindings for stack frames
     among other things and it comes with an easy to use command line interface."
 
-  s.required_ruby_version = ">= 2.4.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.files = Dir["lib/**/*.rb", "lib/**/*.yml", "ext/**/*.[ch]", "LICENSE"]
   s.bindir = "exe"
@@ -25,5 +25,7 @@ Gem::Specification.new do |s|
   s.extensions = ["ext/byebug/extconf.rb"]
   s.require_path = "lib"
 
+  s.add_dependency "reline", ">= 0.1.2"
+
   s.add_development_dependency "bundler", "~> 2.0"
 end

docker/Dockerfile

@@ -9,8 +9,6 @@ RUN mkdir -p /usr/local/etc \
 
 ARG ruby_download_url=
 ARG ruby_download_sha256=
-ARG line_edit_lib=
-ARG line_edit_config=
 ARG compiler=
 
 ENV CC $compiler
@@ -39,7 +37,6 @@ RUN set -ex \
     libc-dev \
     libxml2-dev \
     libxslt-dev \
-    $line_edit_lib \
     linux-headers \
     ncurses-dev \
     ruby \
@@ -61,7 +58,6 @@ RUN set -ex \
     --disable-werror \
     --build="$gnuArch" \
     --disable-install-doc \
-    $line_edit_config \
     --enable-shared \
   && make -j "$(nproc)" \
   && make install \

docker/manager.rb

@@ -10,27 +10,20 @@ module Docker
   #
   class Manager
     VERSIONS = %w[
-      2.4.9
       2.5.7
       2.6.5
       2.7.0
     ].freeze
 
-    LINE_EDITORS = %w[
-      readline
-      libedit
-    ].freeze
-
     COMPILERS = %w[
       gcc
       clang
     ].freeze
 
-    attr_reader :version, :line_editor, :compiler
+    attr_reader :version, :compiler
 
-    def initialize(version:, line_editor:, compiler:)
+    def initialize(version:, compiler:)
       @version = version
-      @line_editor = line_editor
       @compiler = compiler
     end
 
@@ -45,8 +38,6 @@ def build
           --build-arg "ruby_download_url=#{download_url}" \
           --build-arg "ruby_download_sha256=#{download_sha256}" \
           --build-arg "compiler=#{compiler}" \
-          --build-arg "line_edit_lib=#{line_editor_package}" \
-          --build-arg "line_edit_config=#{line_editor_configure_flag}" \
           --file "docker/Dockerfile" \
           .
       COMMAND
@@ -154,29 +145,18 @@ def for_last_version_variants(&block)
 
       def for_variants_of(version)
         COMPILERS.each do |compiler|
-          LINE_EDITORS.each do |line_editor|
-            manager = new(
-              version: version,
-              line_editor: line_editor,
-              compiler: compiler
-            )
-
-            yield(manager)
-          end
+          manager = new(
+            version: version,
+            compiler: compiler
+          )
+
+          yield(manager)
         end
       end
     end
 
     private
 
-    def line_editor_package
-      line_editor == "readline" ? "readline-dev" : "libedit-dev"
-    end
-
-    def line_editor_configure_flag
-      line_editor == "readline" ? "" : "--enable-libedit"
-    end
-
     def download_url
       if version == "head"
         "#{download_url_base}/snapshot.tar.xz"
@@ -209,7 +189,7 @@ def run(*command)
     end
 
     def tag
-      "deividrodriguez/byebug:#{version}-#{line_editor}-#{compiler}"
+      "deividrodriguez/byebug:#{version}-#{compiler}"
     end
 
     def squish(command)