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#: * `postgresql-upgrade-database`:
#: Upgrades the database for the `postgresql` formula.
name = "postgresql"
pg = Formula[name]
bin = pg.bin
var = pg.var
version = pg.version
pg_version_file = var/"postgres/PG_VERSION"
pg_version_installed = version.to_s[/^\d+/]
pg_version_data = pg_version_file.read.chomp
if pg_version_installed == pg_version_data
odie <<~EOS
#{name} data already upgraded!
EOS
end
datadir = var/"postgres"
old_datadir = var/"postgres.old"
if old_datadir.exist?
odie <<~EOS
#{old_datadir} already exists!
Remove it if you want to upgrade data automatically.
EOS
end
old_pg_name = "#{name}@#{pg_version_data}"
old_pg_glob = "#{HOMEBREW_PREFIX}/Cellar/#{old_pg_name}/#{pg_version_data}.*/bin"
old_bin = Pathname.glob(old_pg_glob).first
old_bin ||= begin
Formula[old_pg_name]
ohai "brew install #{old_pg_name}"
system "brew", "install", old_pg_name
Pathname.glob(old_pg_glob).first
rescue FormulaUnavailableError
nil
end
odie "No #{name} #{pg_version_data}.* version installed!" unless old_bin
server_stopped = false
moved_data = false
initdb_run = false
upgraded = false
begin
# Following instructions from:
# https://www.postgresql.org/docs/10/static/pgupgrade.html
ohai "Upgrading #{name} data from #{pg_version_data} to #{pg_version_installed}..."
if /#{name}\s+started/ =~ Utils.popen_read("brew", "services", "list")
system "brew", "services", "stop", name
service_stopped = true
elsif quiet_system "#{bin}/pg_ctl", "-D", datadir, "status"
system "#{bin}/pg_ctl", "-D", datadir, "stop"
server_stopped = true
end
ohai "Moving #{name} data from #{datadir} to #{old_datadir}..."
FileUtils.mv datadir, old_datadir
moved_data = true
(var/"postgres").mkpath
system "#{bin}/initdb", "#{var}/postgres"
initdb_run = true
(var/"log").cd do
safe_system "#{bin}/pg_upgrade",
"-r",
"-b", old_bin,
"-B", bin,
"-d", old_datadir,
"-D", datadir,
"-j", Hardware::CPU.cores.to_s
end
upgraded = true
ohai "Upgraded #{name} data from #{pg_version_data} to #{pg_version_installed}!"
ohai "Your #{name} #{pg_version_data} data remains at #{old_datadir}"
ensure
if upgraded
if server_stopped
safe_system "#{bin}/pg_ctl", "-D", datadir, "start"
elsif service_stopped
safe_system "brew", "services", "start", name
end
else
onoe "Upgrading #{name} data from #{pg_version_data} to #{pg_version_installed} failed!"
if initdb_run
ohai "Removing empty #{name} initdb database..."
FileUtils.rm_r datadir
end
if moved_data
ohai "Moving #{name} data back from #{old_datadir} to #{datadir}..."
FileUtils.mv old_datadir, datadir
end
if server_stopped
system "#{bin}/pg_ctl", "-D", datadir, "start"
elsif service_stopped
system "brew", "services", "start", name
end
end
end