tclsh auto-complete

suggest package is: tclreadline.

its git link: https://github.com/flightaware/tclreadline

official link: http://tclreadline.sourceforge.net/

to install it:

sudo apt install tcl-tclreadline

after installation is done, add activation to .tclshrc

if {$tcl_interactive} {
    package require tclreadline
    ::tclreadline::Loop
}

However, defining in this way the prompt cannot be customized, see tcl-customize-prompt, which works like colored-tcl-version [pwd],

Full pwd is intolerant, especially when you are in a deep hierarchical path, we only want it to show in basename,

if {$tcl_interactive} {
    package require tclreadline

    namespace eval tclreadline {
        proc prompt1 {} {
            set basename [lindex [split [pwd] /] end]
            return "tcl $basename/ > "
        }
    }

    ::tclreadline::Loop
}

Furthermore, we want it to be colored to differentiate,

if {$tcl_interactive} {
    package require tclreadline

    namespace eval tclreadline {
        proc prompt1 {} {
            set basename [lindex [split [pwd] /] end]
            return "tcl \033\[01;34m$basename/\033\[0m > "
        }
    }

    ::tclreadline::Loop
}

for ANSI escape code: https://gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797

tcl library path

auto_path: https://www.systutorials.com/docs/linux/man/n-auto_path/

to show its path, inside tcl shell,

puts $auto_path
# puts $::auto_path

# OR

join $::auto_path \n

customize-auto_path

tcl package require

link: https://wiki.tcl-lang.org/page/package+require

tcl customize prompt

link: tclshhttps://www.tcl.tk/man/tcl8.4/UserCmd/tclsh.html

When tclsh is invoked interactively it normally prompts for each command with ``% ‘'. You can change the prompt by setting the variables tcl_prompt1 and tcl_prompt2. If variable tcl_prompt1 exists then it must consist of a Tcl script to output a prompt; instead of outputting a prompt tclsh will evaluate the script in tcl_prompt1. The variable tcl_prompt2 is used in a similar way when a newline is typed but the current command isn't yet complete; if tcl_prompt2 isn't set then no prompt is output for incomplete commands.

what is the difference between tcl_prompt1 and tcl_prompt2?

As we can see, tcl_prompt1 set prompt that we want, tcl_prompt2 acts like a notice for the incomplete typing.

others

good to know another file archive type zstd

its link: https://github.com/facebook/zstd

sudo apt install zstd
unzstd file.zstd