First release of Sequel driver for River Ruby bindings

Related to main `riverqueue` gem's push in [1], this one provides a
driver implementation for the Sequel gem. This is a similar concept to
use the use of `riverpgxv5` in the main Go package -- it breaks up
implementations for specific database packages into separate gems so
that projects using River don't have include every third party database
framework under the sun. I'll also be writing one for ActiveRecord.

Like with [1], functionality for unique jobs and batch inserts is
currently missing, to be added on a follow up release.

[1] riverqueue/riverqueue-ruby#1

.github/workflows/ci.yml

@@ -0,0 +1,80 @@
+name: CI
+
+env:
+  # Database to connect to that can create other databases with `CREATE DATABASE`.
+  ADMIN_DATABASE_URL: postgres://postgres:postgres@localhost:5432
+
+  # Just a common place for steps to put binaries they need and which is added
+  # to GITHUB_PATH/PATH.
+  BIN_PATH: /home/runner/bin
+
+  # A suitable URL for a test database.
+  TEST_DATABASE_URL: postgres://postgres:postgres@127.0.0.1:5432/river_ruby_test?sslmode=disable
+
+on:
+  - push
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Ruby + `bundle install`
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "head"
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
+      - name: Standard Ruby
+        run: bundle exec standardrb
+
+  spec:
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 2s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Ruby + `bundle install`
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "head"
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
+      # There is a version of Go on Actions' base image, but it's old and can't
+      # read modern `go.mod` annotations correctly.
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "stable"
+          check-latest: true
+
+      - name: Create database
+        run: psql --echo-errors --quiet -c '\timing off' -c "CREATE DATABASE river_ruby_test;" ${ADMIN_DATABASE_URL}
+
+      - name: Install River CLI
+        run: go install github.com/riverqueue/river/cmd/river@latest
+
+      - name: river migrate-up
+        run: river migrate-up --database-url "$TEST_DATABASE_URL"
+
+      - name: Rspec
+        run: bundle exec rspec

Gemfile

@@ -1,2 +1,14 @@
-source 'https://rubygems.org'
-gemspec
+source "https://rubygems.org"
+
+gemspec
+
+group :development, :test do
+  gem "riverqueue", git: "https://github.com/riverqueue/riverqueue-ruby", branch: "brandur-first-release"
+  # gem "riverqueue", path: "../riverqueue-ruby"
+  gem "standard"
+end
+
+group :test do
+  gem "rspec-core"
+  gem "rspec-expectations"
+end

Gemfile.lock

@@ -1,17 +1,84 @@
+GIT
+  remote: https://github.com/riverqueue/riverqueue-ruby
+  revision: 802eee2f804826d7bd41b6cef9169a80f5b0be37
+  branch: brandur-first-release
+  specs:
+    riverqueue (0.0.1)
+
 PATH
   remote: .
   specs:
     riverqueue-sequel (0.0.1)
+      pg
+      sequel
 
 GEM
   remote: https://rubygems.org/
   specs:
+    ast (2.4.2)
+    bigdecimal (3.1.4)
+    diff-lcs (1.5.0)
+    json (2.6.3)
+    language_server-protocol (3.17.0.3)
+    lint_roller (1.1.0)
+    parallel (1.23.0)
+    parser (3.2.2.4)
+      ast (~> 2.4.1)
+      racc
+    pg (1.5.4)
+    racc (1.7.3)
+    rainbow (3.1.1)
+    regexp_parser (2.8.2)
+    rexml (3.2.6)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.12.0)
+    rspec-support (3.12.1)
+    rubocop (1.57.2)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.2.2.4)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.30.0)
+      parser (>= 3.2.1.0)
+    rubocop-performance (1.19.1)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    ruby-progressbar (1.13.0)
+    sequel (5.74.0)
+      bigdecimal
+    standard (1.32.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.57.2)
+      standard-custom (~> 1.0.0)
+      standard-performance (~> 1.2)
+    standard-custom (1.0.2)
+      lint_roller (~> 1.0)
+      rubocop (~> 1.50)
+    standard-performance (1.2.1)
+      lint_roller (~> 1.1)
+      rubocop-performance (~> 1.19.1)
+    unicode-display_width (2.5.0)
 
 PLATFORMS
   arm64-darwin-22
+  x86_64-linux
 
 DEPENDENCIES
+  riverqueue!
   riverqueue-sequel!
+  rspec-core
+  rspec-expectations
+  standard
 
 BUNDLED WITH
    2.4.20

docs/README.md

@@ -0,0 +1,23 @@
+#  riverqueue-sequel [![Build Status](https://github.com/riverqueue/riverqueue-ruby-sequel/workflows/CI/badge.svg)](https://github.com/riverqueue/riverqueue-ruby-sequel/actions)
+
+[Sequel](https://github.com/jeremyevans/sequel) driver for [River](https://github.com/riverqueue/river)'s [`riverqueue` gem for Ruby](https://rubygems.org/gems/riverqueue).
+
+`Gemfile` should contain the core gem and a driver like this one:
+
+``` yaml
+gem "riverqueue"
+gem "riverqueue-sequel"
+```
+
+Initialize a client with:
+
+```ruby
+DB = Sequel.connect("postgres://...")
+client = River::Client.new(River::Driver::Sequel.new(DB))
+```
+
+See also [`rubyqueue`](https://github.com/riverqueue/riverqueue-ruby).
+
+## Development
+
+See [development](./development.md).

docs/development.md

@@ -0,0 +1,39 @@
+# riverqueue-ruby development
+
+## Install dependencies
+
+```shell
+$ bundle install
+```
+## Run tests
+
+Create a test database and migrate with River's CLI:
+
+```shell
+$ go install github.com/riverqueue/river/cmd/river
+$ createdb riverqueue_ruby_test
+$ river migrate-up --database-url "postgres://localhost/riverqueue_ruby_test"
+```
+
+Run all specs:
+
+```shell
+$ bundle exec rspec spec
+```
+
+## Run lint
+
+```shell
+$ standardrb --fix
+```
+
+## Publish a new gem
+
+```shell
+git checkout master && git pull --rebase
+VERSION=v0.0.x
+gem build riverqueue-sequel.gemspec
+gem push riverqueue-sequel-$VERSION.gem
+git tag $VERSION
+git push --tags
+```

lib/driver.rb

@@ -0,0 +1,72 @@
+module River::Driver
+  # Provides a Sequel driver for River.
+  #
+  # Used in conjunction with a River client like:
+  #
+  #   DB = Sequel.connect("postgres://...")
+  #   client = River::Client.new(River::Driver::Sequel.new(DB))
+  #
+  class Sequel
+    def initialize(db)
+      @db = db
+
+      # It's Ruby, so we can only define a model after Sequel's established a
+      # connection because it's all dynamic.
+      if !River::Driver::Sequel.const_defined?(:RiverJob)
+        River::Driver::Sequel.const_set(:RiverJob, Class.new(::Sequel::Model(:river_job)))
+
+        # Since we only define our model once, take advantage of knowing this is
+        # our first initialization to add required extensions.
+        db.extension(:pg_array)
+      end
+    end
+
+    def insert(insert_params)
+      # the call to `#compact` is important so that we remove nils and table
+      # default values get picked up instead
+      to_job_row(
+        RiverJob.create(
+          {
+            args: insert_params.encoded_args,
+            kind: insert_params.kind,
+            max_attempts: insert_params.max_attempts,
+            priority: insert_params.priority,
+            queue: insert_params.queue,
+            state: insert_params.state,
+            scheduled_at: insert_params.scheduled_at,
+            tags: insert_params.tags ? ::Sequel.pg_array(insert_params.tags) : nil
+          }.compact
+        )
+      )
+    end
+
+    private def to_job_row(river_job)
+      # needs to be accessed through values because Sequel shadows `errors`
+      errors = river_job.values[:errors]
+
+      River::JobRow.new(
+        id: river_job.id,
+        attempt: river_job.attempt,
+        attempted_by: river_job.attempted_by,
+        created_at: river_job.created_at,
+        encoded_args: river_job.args,
+        errors: errors ? JSON.parse(errors, symbolize_names: true).map { |e|
+          River::AttemptError.new(
+            at: e[:at],
+            error: e[:error],
+            num: e[:num],
+            trace: e[:trace]
+          )
+        } : nil,
+        finalized_at: river_job.finalized_at,
+        kind: river_job.kind,
+        max_attempts: river_job.max_attempts,
+        priority: river_job.priority,
+        queue: river_job.queue,
+        scheduled_at: river_job.scheduled_at,
+        state: river_job.state,
+        tags: river_job.tags
+      )
+    end
+  end
+end

lib/riverqueue-sequel.rb

@@ -1,8 +1,6 @@
+require "sequel"
+
+require_relative "driver"
+
 module River
-  module Driver
-    module Sequel
-      def initialize
-      end
-    end
-  end
-end
+end

riverqueue-sequel.gemspec

@@ -1,11 +1,14 @@
 Gem::Specification.new do |s|
-  s.name        = "riverqueue-sequel"
-  s.version     = "0.0.1"
-  s.summary     = "Sequel driver for the River Ruby gem."
+  s.name = "riverqueue-sequel"
+  s.version = "0.0.1"
+  s.summary = "Sequel driver for the River Ruby gem."
   s.description = "Sequel driver for the River Ruby gem."
-  s.authors     = ["Blake Gentry", "Brandur Leach"]
-  s.email       = "brandur@brandur.org"
-  s.files       = ["lib/riverqueue-sequel.rb"]
-  s.homepage    = "https://riverqueue.com"
-  s.license     = "LGPL-3.0-or-later"
+  s.authors = ["Blake Gentry", "Brandur Leach"]
+  s.email = "brandur@brandur.org"
+  s.files = ["lib/riverqueue-sequel.rb"]
+  s.homepage = "https://riverqueue.com"
+  s.license = "LGPL-3.0-or-later"
+
+  s.add_dependency "pg"
+  s.add_dependency "sequel"
 end