Class: Envo::Cli::InstallerBash

Inherits:
Object
  • Object
show all
Defined in:
lib/envo/cli/installer_bash.rb

Constant Summary collapse

ENVO_INSTALLATION_BEGIN =

def detect_installed_envo?()

stdout, stderr, code = Open3.capture3("bash -ic 'command -v envo'")
code.success?

end

'### BEGIN envo installation (don\'t remove line)'
ENVO_INSTALLATION_END = 
'### END envo installation (don\'t remove line)'
SOURCE_FILE = 
'envo.sh'
DEFAULT_DOTFILE = 
File.join(Dir.home, '.bashrc')
USAGE = 
<<~EOF
  usage: envo-install [u] [--dotfile <path>]
EOF

Instance Method Summary collapse

Instance Method Details

#find_existing_installation_data(dotfile) ⇒ Object 



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# File 'lib/envo/cli/installer_bash.rb', line 14

def find_existing_installation_data(dotfile)
  return nil if !File.exist?(dotfile)

  raise Envo::Error.new "'#{dotfile}' exists but is not a file. You need to choose a file." if !File.file?(dotfile)

  lines = File.readlines(dotfile)
  first = nil
  last = nil
  lines.each_with_index do |l, i|
    lc = l.chomp
    if lc == ENVO_INSTALLATION_BEGIN
      first = i
    elsif lc == ENVO_INSTALLATION_END
      last = i
    end
  end

  return nil if !first && !last

  if !first || !last
    raise Envo::Error.new <<~EOF
      #{dotfile}' contains a broken confy insallation.
      You need to remove it manually
    EOF
  end

  num = last - first + 1
  return {first: first, num: num, lines: lines}
end

#run(argv) ⇒ Object 



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# File 'lib/envo/cli/installer_bash.rb', line 86

def run(argv)
  if argv.empty?
    try_install(DEFAULT_DOTFILE)
    return 0
  end

  if argv[0] == '--help' || argv[0] == '-?'
    puts "installer for envo v#{Envo::VERSION} #{Envo::VERSION_TYPE}"
    puts USAGE
    puts
    puts '                u - uninstall envo'
    puts ' --dotfile <file> - install to or uninstall form a specified dotfile'
    return 0
  end

  if argv[0] == 'u'
    @uninstalling = true
    argv.shift
  end

  dotfile = DEFAULT_DOTFILE
  if !argv.empty?
    arg = argv.shift
    if arg != '--dotfile'
      STDERR.puts "Unknown argument #{arg}"
      STDERR.puts USAGE
      return 1
    end
    if argv.empty?
      STDERR.puts "Missing dotfile path"
      STDERR.puts USAGE
      return 1
    end
    dotfile = argv.shift
  end

  # if detect_installed_envo?
  #   puts "It seems that you already have envo installed"
  #   puts "Do you want to reinstall it? (y/n)"
  # end
  @uninstalling ? try_uninstall(dotfile) : try_install(dotfile)
  return 0
end

#try_install(dotfile) ⇒ Object 



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# File 'lib/envo/cli/installer_bash.rb', line 45

def try_install(dotfile)
  install_lines = [
    ENVO_INSTALLATION_BEGIN,
    "### envo #{VERSION}",
    File.read(File.join(__dir__, SOURCE_FILE)),
    ENVO_INSTALLATION_END
  ]

  found = find_existing_installation_data(dotfile)

  openmode = 'a'
  if found
    lines = found[:lines]
    lines[found[:first], found[:num]] = install_lines
    install_lines = lines
    openmode = 'w'
  end

  File.open(dotfile, openmode) { |f| f.puts install_lines }
  puts <<~EOF
    Sucessfully installed confy to '#{dotfile}'
    Source the file, or restart the bash session if the file is auto-sourced.
  EOF
end

#try_uninstall(dotfile) ⇒ Object 



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# File 'lib/envo/cli/installer_bash.rb', line 70

def try_uninstall(dotfile)
  found = find_existing_installation_data(dotfile)
  if !found || found[:num] == 0
    raise Envo::Error.new "'#{dotfile}' doesn't seem to contain an envo installation"
  end

  lines = found[:lines]
  lines[found[:first], found[:num]] = []
  File.open(dotfile, 'w') { |f| f.puts lines }
  puts "Suncessfully uninstalled confy from '#{dotfile}'"
end