"command options" suggests several distinct topics:
Certain considerations are common to all these, and are convenient to treat here in a unified way.
[Many people write their own "... -arg1 val1 -arg2 val2 ..." processing, because it's so easy to use Tcl associative arrays (see "Arrays / Hash Maps") simply as the "optional arguments" section in Tcl Gems does ...]
Here is the start of some code to show at least one method of doing command line parsing. Hopefully people will contribute other samples as appropriate.
# If this script was executed, and not just "source"'d, handle argv
if { [string compare [info script] $argv0] == 0} {
while {[llength $argv] > 0 } {
set flag [lindex $argv 0]
switch -- $flag {
"-bool" {
set bool 1
set argv [lrange $argv 1 end]
}
"-option" {
set value [lindex $argv 1]
set argv [lrange $argv 2 end]
}
default { break }
}
}
}
foreach file $argv {
puts "[format "file: %s" $file]"
}A related topic: "Syntax parsing in Tcl".