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Create rails public_data:pull task, to load up the latest public data

Yay, it works! Easy peasy! Love this way of integrating shell and Ruby,
it's cute!
This commit is contained in:
Emi Matchu 2024-03-01 13:18:58 -08:00
parent 8dc11f9940
commit 98dd9ec782

View file

@ -1,3 +1,4 @@
require "open-uri"
require "open3"
desc "Tools to save and import DTI's public modeling data"
@ -11,8 +12,6 @@ namespace :public_data do
"locally and save to #{Rails.configuration.public_data_root}, though!"
end
config = ApplicationRecord.connection_db_config.configuration_hash
# Generate a filename from the current time, and the option name argument
# provided to the command (e.g. `rails public_data:commit[scheduled]`).
timestamp = Time.now.utc.iso8601.gsub(':', '_')
@ -23,6 +22,7 @@ namespace :public_data do
args = []
# The connection details for our database!
config = ApplicationRecord.connection_db_config.configuration_hash
args << "--host=#{config[:host]}" if config[:host]
args << "--user=#{config[:username]}" if config[:username]
args << "--password=#{config[:password]}" if config[:password]
@ -45,23 +45,50 @@ namespace :public_data do
dest_path.dirname.mkpath
# Run mysqldump, pipe it into gzip, and output to the destination file.
sh.mysqldump(*args) | sh.gzip("-c") > dest_path.to_s
sh.transact do
sh.mysqldump(*args) | sh.gzip("-c") > dest_path.to_s
end
puts "Saved dump to #{dest_path}"
# Link this latest dump as `latest.sql.gz`.
latest_path = Rails.configuration.public_data_root / "latest.sql.gz"
File.unlink(latest_path) if File.exist?(latest_path)
File.symlink(dest_path, latest_path)
puts "Linked dump to #{latest_path}"
end
desc "Pull and import the latest public data from production (dev only)"
task :pull do
task :pull => :environment do
unless Rails.env.development?
raise "Can only pull public data in development mode! This helps us " +
"ensure we won't overwrite the production database accidentally."
end
raise NotImplementedError, "TODO!"
args = []
# The connection details for our database!
config = ApplicationRecord.connection_db_config.configuration_hash
args << "--host=#{config[:host]}" if config[:host]
args << "--user=#{config[:username]}" if config[:username]
args << "--password=#{config[:password]}" if config[:password]
args << "--database=#{config.fetch(:database)}"
# Set up a shell, and register the commands we need.
Shell.def_system_command("mysql")
Shell.def_system_command("gunzip")
sh = Shell.new
URI.open("https://impress.openneo.net/public-data/latest.sql.gz") do |file|
# Pipe the latest public data SQL into `gunzip` to unpack it, then pipe
# it into mysql to execute it.
#
# NOTE: We need `open(file)` to wrap it in a plain `File` object, so the
# `Shell` will recognize it correctly! It doesn't accept `Tempfile`.
sh.transact do
(sh.gunzip("-c") < open(file)) | sh.mysql(*args)
end
end
end
end