Add release task

spec/tasks/build/release_spec.cr

@@ -0,0 +1,23 @@
+require "../../../spec_helper"
+
+include CleanupHelper
+
+describe Build::Release do
+  it "creates an executable if a `src/server.cr` file exists" do
+    with_cleanup do
+      Dir.mkdir_p("./src")
+      File.write "./src/server.cr", "puts 1"
+      Build::Release.new.call
+      File.exists?("./server").should be_true
+    end
+  end
+
+  it "does not create executable if the build fails" do
+    with_cleanup do
+      Dir.mkdir_p("./src")
+      File.write "./src/server.cr", %({{ raise "this build will fail" }})
+      Build::Release.new.call
+      File.exists?("./server").should be_false
+    end
+  end
+end

tasks/build/release.cr

@@ -0,0 +1,22 @@
+require "lucky_cli"
+require "colorize"
+
+class Build::Release < LuckyCli::Task
+  include LuckyCli::TextHelpers
+
+  banner "Compile app for production"
+
+  def call
+    command = "crystal build --release src/server.cr"
+
+    log "Building binary with '#{command}"
+    process = Process.run(command, shell: true, output: STDOUT, error: STDERR)
+    if process.success?
+      log "Build succeeded - binary saved at './server'"
+    end
+  end
+
+  def log(message)
+    puts "  #{green_arrow} #{message}"
+  end
+end