Add example: create rpm&deb packages with init scripts

Took me some time to figure out how to use the api -- So I am submitting this example to add some documentation for the API, specifically pleaserun.

Author: cfstras

examples/api/dir-to-deb-rpm-with-init.rb

@@ -0,0 +1,53 @@
+#!/usr/bin/env ruby
+$: << File.join(File.dirname(__FILE__), "..", "..", "lib")
+
+# This example uses the API to create a package from local files
+# it also creates necessary init-scripts and systemd files so our executable can be used as a service
+
+require "fpm"
+require "tmpdir"
+require "fpm/package/pleaserun"
+
+# enable logging
+FPM::Util.send :module_function, :logger
+FPM::Util.logger.level = :info
+FPM::Util.logger.subscribe STDERR
+
+package = FPM::Package::Dir.new
+
+# Set some attributes
+package.name = "my-service"
+package.version = "1.0"
+
+# Add a script to run after install (should be in the current directory):
+package.scripts[:after_install] = 'my_after_install_script.sh'
+
+# Example for adding special attributes
+package.attributes[:deb_group] = "super-useful"
+package.attributes[:rpm_group] = "super-useful"
+
+# Add our files (should be in the current directory):
+package.input("my-executable=/usr/bin/")
+package.input("my-library.so=/usr/lib/")
+
+# Now, add our init-scripts, systemd services, and so on:
+pleaserun = package.convert(FPM::Package::PleaseRun)
+pleaserun.input ["/usr/bin/my-executable", "--foo-from", "bar"]
+
+# Create two output packages!
+output_packages = []
+output_packages << pleaserun.convert(FPM::Package::RPM)
+output_packages << pleaserun.convert(FPM::Package::Deb)
+
+# and write them both.
+begin
+  output_packages.each do |output_package|
+    output = output_package.to_s
+    output_package.output(output)
+
+    puts "successfully created #{output}"
+  end
+ensure
+  # defer cleanup until the end
+  output_packages.each {|p| p.cleanup}
+end