~.tclsh/~.wishsh to source files from ~/.tcl/rcfiles

tclsh.tcl

namespace eval TclshLoader { 
    set tcl_rcFileDir [file join $env(HOME) .tcl rcfiles]
    if {[expr {[file exists $tcl_rcFileDir] && [file isdirectory $tcl_rcFileDir]}]} {
        set tcl_rcFiles [glob -type {f r} -directory $tcl_rcFileDir -- *.tcl]
        # put tclreadline.tcl last since it enters a loop and prevents further execution of .tclsh/.wishsh
        set tcl_rcFiles_tclreadlineIdx [lsearch -glob $tcl_rcFiles */tclreadline.tcl]
        if {[expr {($tcl_rcFiles_tclreadlineIdx != -1) && ([llength $tcl_rcFiles] > 1)}]} {
            set tcl_rcFiles_tclreadlinePath [lindex $tcl_rcFiles $tcl_rcFiles_tclreadlineIdx]
            set tcl_rcFiles [lreplace $tcl_rcFiles $tcl_rcFiles_tclreadlineIdx $tcl_rcFiles_tclreadlineIdx]
            lappend tcl_rcFiles $tcl_rcFiles_tclreadlinePath
        }
        # puts "tcl_rcFiles: $tcl_rcFiles"
        unset tcl_rcFiles_tclreadlineIdx
        unset -nocomplain tcl_rcFiles_tclreadlinePath
        set tcl_rcFiles_lastIdx [expr [llength $tcl_rcFiles] - 1]
        set tcl_rcFiles_idx 0
        interp alias {} lambda {} proc {}
        foreach tcl_rcFiles_rcFile $tcl_rcFiles {
            # puts "sourcing $tcl_rcFiles_rcFile"
            namespace eval :: {
                if {[expr $TclshLoader::tcl_rcFiles_idx == $TclshLoader::tcl_rcFiles_lastIdx]} {
                    unset TclshLoader::tcl_rcFiles_idx
                    unset TclshLoader::tcl_rcFiles_lastIdx
                    source [[lambda f {unset TclshLoader::tcl_rcFiles_rcFile; return $f}] $TclshLoader::tcl_rcFiles_rcFile]
                } else {
                    source $TclshLoader::tcl_rcFiles_rcFile
                }
            }
            incr tcl_rcFiles_idx
        }
    } else {
        unset tcl_rcFileDir
    }
}