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assets.rake
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Sun, Aug 10, 3:11 AM

assets.rake
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load File.expand_path("../set_rails_env.rake", __FILE__)
module Capistrano
class FileNotFound < StandardError
end
end
namespace :deploy do
desc 'Normalize asset timestamps'
task :normalize_assets => [:set_rails_env] do
on release_roles(fetch(:assets_roles)) do
assets = fetch(:normalize_asset_timestamps)
if assets
within release_path do
execute :find, "#{assets} -exec touch -t #{asset_timestamp} {} ';'; true"
end
end
end
end
desc 'Compile assets'
task :compile_assets => [:set_rails_env] do
invoke 'deploy:assets:precompile'
invoke 'deploy:assets:backup_manifest'
end
desc 'Cleanup expired assets'
task :cleanup_assets => [:set_rails_env] do
next unless fetch(:keep_assets)
on release_roles(fetch(:assets_roles)) do
within release_path do
with rails_env: fetch(:rails_env) do
execute :rake, "assets:clean[#{fetch(:keep_assets)}]"
end
end
end
end
desc 'Rollback assets'
task :rollback_assets => [:set_rails_env] do
begin
invoke 'deploy:assets:restore_manifest'
rescue Capistrano::FileNotFound
invoke 'deploy:compile_assets'
end
end
after 'deploy:updated', 'deploy:compile_assets'
after 'deploy:updated', 'deploy:cleanup_assets'
after 'deploy:updated', 'deploy:normalize_assets'
after 'deploy:reverted', 'deploy:rollback_assets'
namespace :assets do
task :precompile do
on release_roles(fetch(:assets_roles)) do
within release_path do
with rails_env: fetch(:rails_env) do
execute :rake, "assets:precompile"
end
end
end
end
task :backup_manifest do
on release_roles(fetch(:assets_roles)) do
within release_path do
backup_path = release_path.join('assets_manifest_backup')
execute :mkdir, '-p', backup_path
execute :cp,
detect_manifest_path,
backup_path
end
end
end
task :restore_manifest do
on release_roles(fetch(:assets_roles)) do
within release_path do
target = detect_manifest_path
source = release_path.join('assets_manifest_backup', File.basename(target))
if test "[[ -f #{source} && -f #{target} ]]"
execute :cp, source, target
else
msg = 'Rails assets manifest file (or backup file) not found.'
warn msg
fail Capistrano::FileNotFound, msg
end
end
end
end
def detect_manifest_path
%w(
.sprockets-manifest*
manifest*.*
).each do |pattern|
candidate = release_path.join('public', fetch(:assets_prefix), pattern)
return capture(:ls, candidate).strip if test(:ls, candidate)
end
msg = 'Rails assets manifest file not found.'
warn msg
fail Capistrano::FileNotFound, msg
end
end
end
# we can't set linked_dirs in load:defaults,
# as assets_prefix will always have a default value
namespace :deploy do
task :set_linked_dirs do
set :linked_dirs, fetch(:linked_dirs, []).push("public/#{fetch(:assets_prefix)}")
end
end
after 'deploy:set_rails_env', 'deploy:set_linked_dirs'
namespace :load do
task :defaults do
set :assets_roles, fetch(:assets_roles, [:web])
set :assets_prefix, fetch(:assets_prefix, 'assets')
end
end

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