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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 $histfile
while 1 {
if {[history getline "jim> " cmd] < 0} {
break
}
if {$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
}
# jimsh also does:
# - check for a complete command: [info complete]
# - handle other non-error return codes and changes the prompt: [info returncodes]
# - displays the complete error message: [errorInfo]
try {
set result [eval $cmd]
if {$result ne {}} {
puts $result
}
} on error msg {
puts $msg
}
}
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