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# Simple example of how the history extension
# can be used to provide line editing and history
# Build jimsh with the history extension and enable line editing (the default)
# ./configure --with-ext=history
package require history
set histfile [env HOME]/.jtclsh
history load $histfile
set prefix ""
while {1} {
# Read a complete line (script)
set prompt "${prefix}jim> "
set cmd {}
while {1} {
if {[history getline $prompt line] < 0} {
exit 0
}
if {$cmd ne ""} {
append cmd \n
}
append cmd $line
if {[info complete $cmd char]} {
break
}
set prompt "$char> "
}
if {$cmd eq "h"} {
history show
continue
}
# Don't bother adding single char commands to the history
if {[string length $cmd] > 1} {
history add $cmd
history save $histfile
}
# Evaluate the script and display the error
try {
set result [eval $cmd]
set prefix ""
} on {error return break continue signal} {result opts} {
set rcname [info returncodes $opts(-code)]
if {$rcname eq "ok" } {
# Note: return set -code to 0
set rcname return
} elseif {$rcname eq "error"} {
set result [errorInfo $result]
}
set prefix "\[$rcname\] "
}
if {$result ne {}} {
puts $result
}
}
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