discourse/lib/temporary_db.rb

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# frozen_string_literal: true
class TemporaryDb
PG_TEMP_PATH = "/tmp/pg_schema_tmp"
PG_CONF = "#{PG_TEMP_PATH}/postgresql.conf"
PG_SOCK_PATH = "#{PG_TEMP_PATH}/sockets"
def port_available?(port)
TCPServer.open(port).close
true
rescue Errno::EADDRINUSE
false
end
def pg_bin_path
return @pg_bin_path if @pg_bin_path
["13", "12", "11", "10"].each do |v|
bin_path = "/usr/lib/postgresql/#{v}/bin"
if File.exist?("#{bin_path}/pg_ctl")
@pg_bin_path = bin_path
break
end
end
if !@pg_bin_path
bin_path = "/Applications/Postgres.app/Contents/Versions/latest/bin"
if File.exist?("#{bin_path}/pg_ctl")
@pg_bin_path = bin_path
end
end
if !@pg_bin_path
puts "Can not find postgres bin path"
exit 1
end
@pg_bin_path
end
def initdb_path
return @initdb_path if @initdb_path
@initdb_path = `which initdb 2> /dev/null`.strip
if @initdb_path.length == 0
@initdb_path = "#{pg_bin_path}/initdb"
end
@initdb_path
end
def find_free_port(range)
range.each do |port|
return port if port_available?(port)
end
end
def pg_port
@pg_port ||= find_free_port(11000..11900)
end
def pg_ctl_path
return @pg_ctl_path if @pg_ctl_path
@pg_ctl_path = `which pg_ctl 2> /dev/null`.strip
if @pg_ctl_path.length == 0
@pg_ctl_path = "#{pg_bin_path}/pg_ctl"
end
@pg_ctl_path
end
def start
FileUtils.rm_rf PG_TEMP_PATH
`#{initdb_path} -D '#{PG_TEMP_PATH}' --auth-host=trust --locale=en_US.UTF-8 -E UTF8 2> /dev/null`
FileUtils.mkdir PG_SOCK_PATH
conf = File.read(PG_CONF)
File.write(PG_CONF, conf + "\nport = #{pg_port}\nunix_socket_directories = '#{PG_SOCK_PATH}'")
puts "Starting postgres on port: #{pg_port}"
ENV['DISCOURSE_PG_PORT'] = pg_port.to_s
Thread.new do
`#{pg_ctl_path} -D '#{PG_TEMP_PATH}' start`
end
puts "Waiting for PG server to start..."
while !`#{pg_ctl_path} -D '#{PG_TEMP_PATH}' status`.include?('server is running')
sleep 0.1
end
@started = true
`createuser -h localhost -p #{pg_port} -s -D -w discourse 2> /dev/null`
`createdb -h localhost -p #{pg_port} discourse`
puts "PG server is ready and DB is loaded"
end
def stop
@started = false
`#{pg_ctl_path} -D '#{PG_TEMP_PATH}' stop`
end
def with_env(&block)
old_host = ENV["PGHOST"]
old_user = ENV["PGUSER"]
old_port = ENV["PGPORT"]
old_dev_db = ENV["DISCOURSE_DEV_DB"]
old_rails_test_db = ENV["RAILS_TEST_DB"]
ENV["PGHOST"] = "localhost"
ENV["PGUSER"] = "discourse"
ENV["PGPORT"] = pg_port.to_s
ENV["DISCOURSE_DEV_DB"] = "discourse"
ENV["RAILS_TEST_DB"] = "discourse"
yield
ensure
ENV["PGHOST"] = old_host
ENV["PGUSER"] = old_user
ENV["PGPORT"] = old_port
ENV["DISCOURSE_DEV_DB"] = old_dev_db
ENV["RAILS_TEST_DB"] = old_rails_test_db
end
def remove
raise "Error: the database must be stopped before it can be removed" if @started
FileUtils.rm_rf PG_TEMP_PATH
end
def migrate
if !@started
raise "Error: the database must be started before it can be migrated."
end
ActiveRecord::Base.establish_connection(
adapter: 'postgresql',
database: 'discourse',
port: pg_port,
host: 'localhost'
)
puts "Running migrations on blank database!"
old_stdout = $stdout.clone
old_stderr = $stderr.clone
$stdout.reopen(File.new('/dev/null', 'w'))
$stderr.reopen(File.new('/dev/null', 'w'))
SeedFu.quiet = true
Rake::Task["db:migrate"].invoke
ensure
$stdout.reopen(old_stdout) if old_stdout
$stderr.reopen(old_stderr) if old_stderr
end
end