Class: ParseTreeServer

Inherits:
Object
  • Object
show all
Includes:
ParseTreeComm
Defined in:
lib/redparse/parse_tree_server.rb

Constant Summary

Constants included from ParseTreeComm

ParseTreeComm::SERIALIZE

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ParseTreeComm

#get, #put

Class Method Details

.path_to_server_command ⇒ Object 



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# File 'lib/redparse/parse_tree_server.rb', line 35

def self.path_to_server_command
  File.expand_path __FILE__
end

Instance Method Details

#ensure_parse_tree_and_1_8 ⇒ Object 



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# File 'lib/redparse/parse_tree_server.rb', line 39

def ensure_parse_tree_and_1_8
  if ::RUBY_VERSION[/^\d+\.\d+/].to_f>1.8
    ruby18=ENV['RUBY1_8']||fail("you must use ruby <= 1.8 (with parse_tree) or set RUBY1_8 env to a 1.8 interpreter")
    exec ruby18, $0
  else
    begin require 'rubygems'; rescue LoadError; end

    if File.exist? find_home+"/.redparse/parse_tree_server.rc"
      $:.concat File.readlines(find_home+"/.redparse/parse_tree_server.rc").map{|l| l.chop }
    end

    require 'parse_tree'
  end
rescue Exception=>e
  put e
  put nil
  put nil
  raise
end

#find_home ⇒ Object

Finds the user’s home directory. – Some comments from the ruby-talk list regarding finding the home directory:

I have HOME, USERPROFILE and HOMEDRIVE + HOMEPATH. Ruby seems
to be depending on HOME in those code samples. I propose that
it should fallback to USERPROFILE and HOMEDRIVE + HOMEPATH (at
least on Win32).

(originally stolen from rubygems)



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# File 'lib/redparse/parse_tree_server.rb', line 107

def find_home
  ['HOME', 'USERPROFILE'].each do |homekey|
    return ENV[homekey] if ENV[homekey]
  end

  if ENV['HOMEDRIVE'] && ENV['HOMEPATH'] then
    return "#{ENV['HOMEDRIVE']}#{ENV['HOMEPATH']}"
  end

  begin
    File.expand_path("~")
  rescue
    if File::ALT_SEPARATOR then
        "C:/"
    else
        "/"
    end
  end
end

#main ⇒ Object 



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# File 'lib/redparse/parse_tree_server.rb', line 59

def main
  si=STDIN
  so=STDOUT
  @out=so; @in=si
  ensure_parse_tree_and_1_8
    begin
    warnstash=Tempfile.new "warnstash"
    STDERR.reopen warnstash
    instance=ParseTree.new
    while true
      str=get
      exit! if str==:exit!
      if str==:version
        put ::RUBY_VERSION
        next
      end

      pos=STDERR.pos

      tree=
      begin
        instance.parse_tree_for_string(str) #tree
      rescue Exception=>e; 
        tree=e
      end
      put tree

      open(STDERR.path){|f| 
        f.pos=pos
        put warnings=f.read.split #warnings
      }
    end
    rescue Exception=>e; put e; raise
    ensure exit!
    end
end