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#
# pushd.tcl --
#
# C-shell style directory stack procs.
#
#------------------------------------------------------------------------------
# Copyright 1992-1999 Karl Lehenbauer and Mark Diekhans.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted, provided
# that the above copyright notice appear in all copies. Karl Lehenbauer and
# Mark Diekhans make no representations about the suitability of this
# software for any purpose. It is provided "as is" without express or
# implied warranty.
#------------------------------------------------------------------------------
# $Id: pushd.tcl,v 1.1 2001/10/24 23:31:48 hobbs Exp $
#------------------------------------------------------------------------------
#
#@package: TclX-directory_stack pushd popd dirs
global TCLXENV(dirPushList)
set TCLXENV(dirPushList) ""
proc pushd {{new ""}} {
global TCLXENV
set current [pwd]
if {[clength $new] > 0} {
set dirs [glob -nocomplain $new]
set count [llength $dirs]
if {$count == 0} {
error "no such directory: $new"
} elseif {$count != 1} {
error "ambiguous directory: $new: [join $directories ", "]"
}
cd [lindex $dirs 0]
lvarpush TCLXENV(dirPushList) $current
} else {
if [lempty $TCLXENV(dirPushList)] {
error "directory stack empty"
}
cd [lindex $TCLXENV(dirPushList) 0]
lvarpop TCLXENV(dirPushList)
lvarpush TCLXENV(dirPushList) $current
}
return [pwd]
}
proc popd {} {
global TCLXENV
if [lempty $TCLXENV(dirPushList)] {
error "directory stack empty"
}
cd [lvarpop TCLXENV(dirPushList)]
return [pwd]
}
proc dirs {} {
global TCLXENV
return [concat [list [pwd]] $TCLXENV(dirPushList)]
}