Module: CmdStan::Install

Includes:
Utils
Included in:
CmdStan
Defined in:
lib/cmdstan/install.rb

Instance Method Summary collapse

Instance Method Details

#cmdstan_installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cmdstan/install.rb', line 9

def cmdstan_installed?
  # last file to be built
  File.exist?(File.join(CmdStan.path, "bin", "diagnose#{extension}"))
end

#cmdstan_version ⇒ Object 



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# File 'lib/cmdstan/install.rb', line 5

def cmdstan_version
  "2.39.0"
end

#install_cmdstan ⇒ Object 



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# File 'lib/cmdstan/install.rb', line 14

def install_cmdstan
  require "digest"
  require "fileutils"
  require "open-uri"
  require "tmpdir"

  version = cmdstan_version
  dir = CmdStan.path

  # no stanc3 binary for Mac ARM
  if RbConfig::CONFIG["host_os"] !~ /darwin/i && RbConfig::CONFIG["host_cpu"] =~ /arm|aarch64/i
    checksum = "58f0366614120f0f7be56179bb8f89a350af05f037ab5db32f8042fc05b5a587"
    url = "https://github.com/stan-dev/cmdstan/releases/download/v#{version}/cmdstan-#{version}-linux-arm64.tar.gz"
  else
    checksum = "ffe03c29c9f139d77deeb156a2a0911ebf0742ae38311c739f4fcea3bc4f8909"
    url = "https://github.com/stan-dev/cmdstan/releases/download/v#{version}/cmdstan-#{version}.tar.gz"
  end

  puts "Installing CmdStan version: #{version}"
  puts "Install directory: #{dir}"

  # only needed if default path
  FileUtils.mkdir_p(File.expand_path("../../tmp", __dir__)) unless ENV["CMDSTAN"]

  if cmdstan_installed?
    puts "Already installed"
    return true
  end

  unless Dir.exist?(dir)
    puts "Downloading..."
    URI.parse(url).open(max_redirects: 10) do |download|
      digest =
        if download.respond_to?(:path)
          download.flush
          Digest::SHA256.file(download.path).hexdigest
        else
          Digest::SHA256.hexdigest(download.string)
        end

      if digest != checksum
        raise Error, "Bad checksum: #{digest}"
      end

      # should never happen
      raise "Expected file" if !download.respond_to?(:path)

      puts "Unpacking..."
      Dir.mktmpdir do |tmpdir|
        path = File.join(tmpdir, "cmdstan-#{version}")
        FileUtils.mkdir_p(path)
        tar_args = Gem.win_platform? ? ["--force-local"] : []
        system "tar", "xzf", download.path, "-C", path, "--strip-components=1", *tar_args

        FileUtils.mv(path, dir)
      end
    end
  end

  # cannot be moved after being built
  puts "Building..."
  make_command = Gem.win_platform? ? "mingw32-make" : "make"
  Dir.chdir(dir) do
    # disable precompiled header to save space
    output, status = Open3.capture2e(make_command, "build", "PRECOMPILED_HEADERS=false")
    if status.exitstatus != 0
      puts output
      raise Error, "Build failed"
    end
  end

  puts "Installed"

  true
end