In order to do explorative programming in Tcl shell using macports extensions a self contained script is provided here, the script merges [http://wiki.tcl.tk/26248 script.tcl] from tcl.tk wiki and instructions from [CommittersTipsAndTricks#explore committers' tips and tricks]. The script also uses rlwrap and tcl from macports itself, save it with a name like '''mpsh''' somewhere in your path, for instance $prefix/bin, and make it executable. {{{ #!/usr/bin/env rlwrap tclsh namespace eval prompt {} proc prompt::_init {} { variable buffer "" variable continue 0 variable prompt1 "% " variable prompt2 "" return } proc prompt::_getline {line} { variable buffer variable continue set n1 [string length $line] set line2 [string trimright $line \\] set n2 [string length $line2] set cont [expr {($n1 - $n2) % 2 == 1}] if { $cont } { set line [string range $line 0 end-1] } if { $continue } { append buffer " [string trimleft $line]" } elseif { [string length $buffer] } { append buffer \n$line } else { set buffer $line } set continue $cont if { $continue } { set complete 0 } else { set complete [info complete $buffer] } if { !$continue && [info complete $buffer] } { set code [catch {uplevel #0 $buffer} result] set std [expr {$code > 0 ? "stderr" : "stdout"}] if { [string length $result] } { puts $std "$result" } set buffer "" _prompt 1 } else { _prompt 2 } return } proc prompt::_readable {chan} { variable status set code [catch {gets $chan line} chars] if { $code > 0 } { puts stderr "error reading $chan: $chars" set status "error" } elseif { $chars > -1 } { _getline $line } elseif { [eof $chan] } { set status "eof" } elseif { [fblocked $chan] } { return } else { set status "unknown" } return } proc prompt::_prompt {n} { global tcl_prompt$n variable prompt$n if { [info exists tcl_prompt$n] } { if { [catch {uplevel #0 [set tcl_prompt$n]} result] } { puts stderr $result flush stderr } } else { puts -nonewline stdout [set prompt$n] } flush stdout return } proc prompt::prompt {} { _prompt 1 fileevent stdin readable [list [namespace current]::_readable stdin] vwait [namespace current]::status return } lappend auto_path /opt/local/share/macports/Tcl source /opt/local/share/macports/Tcl/macports1.0/macports_fastload.tcl package require macports 1.0 package require Pextlib prompt::_init if { [info exists argv0] && [string equal $argv0 [info script]] } { # set tcl_prompt2 {puts -nonewline "> "} set prompt::prompt2 "> " prompt::prompt } }}}