download semaphore artifacts

Rakefile

@@ -22,6 +22,13 @@ This.ruby_gemspec do |spec|
   spec.license = "BSD-3-Clause"
 end
 
+This.cross_platforms = %w[
+  x86-mingw32
+  x64-mingw-ucrt
+  x64-mingw32
+]
+
 load 'tasks/default.rake'
 load 'tasks/extension.rake'
 load 'tasks/custom.rake'
+load 'tasks/semaphore.rake'

tasks/semaphore.rake

@@ -0,0 +1,80 @@
+require 'yaml'
+require 'uri'
+require 'open-uri'
+require 'debug'
+
+namespace :semaphore do
+
+  def semaphore_config
+    config_file = File.join(ENV['HOME'], '.sem.yaml')
+    if File.exist?(config_file)
+      config = YAML.load_file(config_file)
+      config.dig('contexts', 'copiousfreetime_semaphoreci_com')
+    else
+      nil
+    end
+  end
+
+  def auth_token
+    semaphore_config.dig('auth', 'token')
+  end
+
+  def semaphore_endpoint
+    "https://#{semaphore_config['host']}"
+  end
+
+  def semaphore_api_endpoint
+    "#{semaphore_endpoint}/api/v1alpha"
+  end
+
+  def project_meta
+    @project_meta ||= URI.open("#{semaphore_api_endpoint}/projects/#{This.name}",
+             "Authorization" => "Token #{auth_token}") do |f|
+      JSON.parse(f.read)
+    end
+  end
+
+  def project_id
+    project_meta.dig('metadata', 'id')
+  end
+
+  def artifacts
+    This.cross_platforms.map do |platform|
+      name = Gem::NameTuple.new(This.name, This.version, platform)
+      basename = "#{name.full_name}.gem"
+      basename
+    end
+  end
+
+  desc "Dump semaphore config"
+  task :config do
+    puts semaphore_config.to_yaml
+  end
+
+  desc "Dump semaphore project meta"
+  task :meta do
+    puts JSON.pretty_generate(project_meta)
+  end
+
+  namespace :artifacts do
+
+    desc "List artifacts"
+    task :list do
+      puts artifacts
+    end
+
+    desc "Download artifacts"
+    task :download do
+      artifacts.each do |basename|
+        url = "#{semaphore_endpoint}/projects/#{project_id}/artifacts/#{basename}"
+        dest = File.join("pkg", basename)
+        puts "downloading #{url} => #{dest}"
+        URI.open(url, "Authorization" => "Token #{auth_token}") do |f|
+          File.open(dest, "wb") do |out|
+            out.write(f.read)
+          end
+        end
+      end
+    end
+  end
+end