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tractorcow/maintenance.rb

Created September 9, 2014 02:09
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maintenance.rb
namespace :maintenance do
desc <<-DESC
Enables maintenance page via apache
DESC
task :enable_http do
on_rollback {
run "if [ -f #{current_path}/.htaccess_original ]; then mv #{current_path}/.htaccess_original #{current_path}/.htaccess; fi"
run "if [ -f #{current_path}/maintenance.html ]; then rm #{current_path}/maintenance.html; fi"
}
# Does the location contain a site?
has_htaccess = nil
run "if [ -f \"#{current_path}/.htaccess\" ]; then echo 1; else echo 0; fi" do |_, _, data|
if data[0] == "1"
has_htaccess = true
end
end
if has_htaccess == nil
# Don't try putting maintenance screen on non-standard instances (all SilverStripe sites will have the .htaccess file)
logger.debug "Skipping maintenance on missing .htaccess file."
else
# In case .htaccess_original exists assume that .htaccess is the maintenance version
run "if [ -f \"#{current_path}/.htaccess_original\" ]; then echo 1; else mv #{current_path}/.htaccess #{current_path}/.htaccess_original && echo 0; fi" do |_, _, data|
if data[0] == "1"
logger.debug "Existing .htaccess_original has been noticed and left untouched."
end
end
# if there's an error-503.html file available in assets, use that for the maintenance page
custom_maintenance = nil
custom_maintenance_path = "#{shared_path}/assets/error-503.html"
run "if [ -f \"#{custom_maintenance_path}\" ]; then cp #{custom_maintenance_path} #{current_path}/maintenance.html && echo 1; else echo 0; fi" do |_, _, data|
if data[0] == "1"
custom_maintenance = true
end
end
# if there's no custom maintenance page found above, use a default one supplied with deploynaut
if custom_maintenance == nil
upload(File.expand_path("../maintenance.html.template", File.dirname(__FILE__)), current_path + "/maintenance.html")
end
upload(File.expand_path("../maintenance.htaccess.template", File.dirname(__FILE__)), current_path + "/.htaccess")
end
end
desc <<-DESC
Disables maintenance page via apache
DESC
task :disable_http do
# If deployment has been successful the new release is in place, and the maintenance screen is already gone.
run "if [ -f #{current_path}/.htaccess_original ]; then mv #{current_path}/.htaccess_original #{current_path}/.htaccess; fi"
run "if [ -f #{current_path}/maintenance.html ]; then rm #{current_path}/maintenance.html; fi"
end
desc <<-DESC
Enables a maintenance page on the deploy target and disables normal traffic to the site.
Copies a template .htaccess and html page into the current release directory.
Set maintanance_method to either 'http' or a custom defined task
DESC
task :enable do
method = if defined?(maintenance_method) then maintenance_method else 'http' end
invoke "maintenance:enable_#{method}"
end
desc <<-DESC
Disables maintenance page on the deploy target. Safe to run even if maintenance page has never been enabled.
DESC
task :disable do
method = if defined?(maintenance_method) then maintenance_method else 'http' end
invoke "maintenance:disable_#{method}"
end
end
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