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# frozen_string_literal: false
#
# irb/multi-irb.rb - multiple irb module
# $Release Version: 0.9.6$
# $Revision: 53141 $
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
IRB.fail CantShiftToMultiIrbMode unless defined?(Thread)
require "thread"
module IRB
class JobManager
# Creates a new JobManager object
def initialize
@jobs = []
@current_job = nil
end
# The active irb session
attr_accessor :current_job
# The total number of irb sessions, used to set +irb_name+ of the current
# Context.
def n_jobs
@jobs.size
end
# Returns the thread for the given +key+ object, see #search for more
# information.
def thread(key)
th, = search(key)
th
end
# Returns the irb session for the given +key+ object, see #search for more
# information.
def irb(key)
_, irb = search(key)
irb
end
# Returns the top level thread.
def main_thread
@jobs[0][0]
end
# Returns the top level irb session.
def main_irb
@jobs[0][1]
end
# Add the given +irb+ session to the jobs Array.
def insert(irb)
@jobs.push [Thread.current, irb]
end
# Changes the current active irb session to the given +key+ in the jobs
# Array.
#
# Raises an IrbAlreadyDead exception if the given +key+ is no longer alive.
#
# If the given irb session is already active, an IrbSwitchedToCurrentThread
# exception is raised.
def switch(key)
th, irb = search(key)
IRB.fail IrbAlreadyDead unless th.alive?
IRB.fail IrbSwitchedToCurrentThread if th == Thread.current
@current_job = irb
th.run
Thread.stop
@current_job = irb(Thread.current)
end
# Terminates the irb sessions specified by the given +keys+.
#
# Raises an IrbAlreadyDead exception if one of the given +keys+ is already
# terminated.
#
# See Thread#exit for more information.
def kill(*keys)
for key in keys
th, _ = search(key)
IRB.fail IrbAlreadyDead unless th.alive?
th.exit
end
end
# Returns the associated job for the given +key+.
#
# If given an Integer, it will return the +key+ index for the jobs Array.
#
# When an instance of Irb is given, it will return the irb session
# associated with +key+.
#
# If given an instance of Thread, it will return the associated thread
# +key+ using Object#=== on the jobs Array.
#
# Otherwise returns the irb session with the same top-level binding as the
# given +key+.
#
# Raises a NoSuchJob exception if no job can be found with the given +key+.
def search(key)
job = case key
when Integer
@jobs[key]
when Irb
@jobs.find{|k, v| v.equal?(key)}
when Thread
@jobs.assoc(key)
else
@jobs.find{|k, v| v.context.main.equal?(key)}
end
IRB.fail NoSuchJob, key if job.nil?
job
end
# Deletes the job at the given +key+.
def delete(key)
case key
when Integer
IRB.fail NoSuchJob, key unless @jobs[key]
@jobs[key] = nil
else
catch(:EXISTS) do
@jobs.each_index do
|i|
if @jobs[i] and (@jobs[i][0] == key ||
@jobs[i][1] == key ||
@jobs[i][1].context.main.equal?(key))
@jobs[i] = nil
throw :EXISTS
end
end
IRB.fail NoSuchJob, key
end
end
until assoc = @jobs.pop; end unless @jobs.empty?
@jobs.push assoc
end
# Outputs a list of jobs, see the irb command +irb_jobs+, or +jobs+.
def inspect
ary = []
@jobs.each_index do
|i|
th, irb = @jobs[i]
next if th.nil?
if th.alive?
if th.stop?
t_status = "stop"
else
t_status = "running"
end
else
t_status = "exited"
end
ary.push format("#%d->%s on %s (%s: %s)",
i,
irb.context.irb_name,
irb.context.main,
th,
t_status)
end
ary.join("\n")
end
end
@JobManager = JobManager.new
# The current JobManager in the session
def IRB.JobManager
@JobManager
end
# The current Context in this session
def IRB.CurrentContext
IRB.JobManager.irb(Thread.current).context
end
# Creates a new IRB session, see Irb.new.
#
# The optional +file+ argument is given to Context.new, along with the
# workspace created with the remaining arguments, see WorkSpace.new
def IRB.irb(file = nil, *main)
workspace = WorkSpace.new(*main)
parent_thread = Thread.current
Thread.start do
begin
irb = Irb.new(workspace, file)
rescue
print "Subirb can't start with context(self): ", workspace.main.inspect, "\n"
print "return to main irb\n"
Thread.pass
Thread.main.wakeup
Thread.exit
end
@CONF[:IRB_RC].call(irb.context) if @CONF[:IRB_RC]
@JobManager.insert(irb)
@JobManager.current_job = irb
begin
system_exit = false
catch(:IRB_EXIT) do
irb.eval_input
end
rescue SystemExit
system_exit = true
raise
#fail
ensure
unless system_exit
@JobManager.delete(irb)
if @JobManager.current_job == irb
if parent_thread.alive?
@JobManager.current_job = @JobManager.irb(parent_thread)
parent_thread.run
else
@JobManager.current_job = @JobManager.main_irb
@JobManager.main_thread.run
end
end
end
end
end
Thread.stop
@JobManager.current_job = @JobManager.irb(Thread.current)
end
@CONF[:SINGLE_IRB_MODE] = false
@JobManager.insert(@CONF[:MAIN_CONTEXT].irb)
@JobManager.current_job = @CONF[:MAIN_CONTEXT].irb
class Irb
def signal_handle
unless @context.ignore_sigint?
print "\nabort!!\n" if @context.verbose?
exit
end
case @signal_status
when :IN_INPUT
print "^C\n"
IRB.JobManager.thread(self).raise RubyLex::TerminateLineInput
when :IN_EVAL
IRB.irb_abort(self)
when :IN_LOAD
IRB.irb_abort(self, LoadAbort)
when :IN_IRB
# ignore
else
# ignore other cases as well
end
end
end
trap("SIGINT") do
@JobManager.current_job.signal_handle
Thread.stop
end
end
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