build-wasm-runtimes.rb for Polkadot

build-wasm-runtimes.rb

#!/usr/bin/env ruby

# Copy this file to an empty directory, make executable (`chmod +x build-wasm-runtimes.rb`)
# Run it: `./build-wasm-runtimes.rb`

require 'fileutils'
require 'pty'

# List commits for each desired release
RELEASES = [
  '72ce1c8', # Polkadot v0.8.29
  '99043f7', # Polkadot v0.8.28-1
  '2f84569'  # Polkadot v0.8.27
]

# List of runtimes to build
RUNTIMES = [
  'polkadot',
  'kusama'
]

TRACING_FEATURE = 'with-tracing = ["frame-executive/with-tracing", "sp-io/with-tracing"]'

def build_polkadot(commit)
  puts "Building polkadot..."
  cmd = 'cargo build --release --features with-tracing'
  base_dir = Dir.pwd
  RUNTIMES.each do |runtime|
    Dir.chdir "#{base_dir}/runtime/#{runtime}"
    begin
      PTY.spawn cmd do |stdout, _stdin, _pid|
        begin
          stdout.each do |line|
            puts line
          end
        rescue Errno::EIO
          puts "End of IO"
        end
      end
    rescue PTY::ChildExited
      puts "Polkadot build exited"
    end
    Dir.chdir base_dir
    file_name = "#{runtime}-runtime/#{runtime}_runtime.compact.wasm"
    dest_file = "#{commit}-#{file_name}"
    copy_cmd = "cp -r ./target/release/wbuild/#{file_name} ../tracing-runtimes/#{dest_file}"
    puts copy_cmd
    system copy_cmd
  end
end

def add_feature()
  Dir.foreach 'runtime' do |dir|
    next unless RUNTIMES.include? dir
    file_name = "./runtime/#{dir}/Cargo.toml"
    puts "Adding required features to: `#{file_name}`"
    next unless File.file? file_name
    file = File.open file_name
    contents = file.read
    if contents.length < 1
      puts "skipping `#{dir}`..."
    end
    file.close
    return if contents.include? TRACING_FEATURE
    index = contents.index('[features]') + 10
    contents.insert index, "\n#{TRACING_FEATURE}"
    File.write file_name, contents
  end
end

unless File.directory? 'polkadot'
  unless system 'git clone https://github.com/paritytech/polkadot.git'
    abort 'Failed to clone polkadot'
  end
end

FileUtils.mkdir_p 'tracing-runtimes'

RUNTIMES.each do |runtime|
  FileUtils.mkdir_p "tracing-runtimes/#{runtime}-runtime"
end

Dir.chdir 'polkadot'

RELEASES.each do |commit|
  runtime_path = "../tracing-runtimes/#{commit}"
  if File.file? runtime_path
    puts "Runtime #{runtime_path} exists already, skipping..."
    next
  end
  puts "Building runtime #{commit}..."
  system 'git reset --hard'
  system "git checkout #{commit}"
  add_feature
  build_polkadot commit
end