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# # ## ### ##### ######## ############# ####################
## -*- tcl -*-
## (C) 2024 Andreas Kupries
# The code here is a forward-compatibility implementation of Tcl 9's
# `file home`, for Tcl 8.x.
# # ## ### ##### ######## ############# ####################
package provide file::home 1
package require Tcl 8 9
# Do nothing if the "tcl::file::home" command exists already (9 and higher).
if {[llength [info commands ::tcl::file::home]]} return
# Tcl 8 forward compatibility implementations
#
# It is not fully compatible.
#
# `file home` does not throw an error when trying
# to get the home directory of an unknown user as
# the Tcl 9 implementation does.
namespace eval ::tcl {}
namespace eval ::tcl::file {}
proc ::tcl::file::home {{user {}}} {
if {$user eq {}} {
return ~
} else {
# This should check if the user exists
return ~$user
}
}
proc ::tcl::file::tildeexpand {path} {
# 8.x does not have to actually expand anything here
# This should check if the user exists
return $path
}
if {[namespace ensemble exists ::file]} {
apply {{} {
set fec [namespace ensemble configure ::file -map]
dict set fec home ::tcl::file::home
dict set fec tildeexpand ::tcl::file::tildeexpand
namespace ensemble configure ::file -map $fec
unset fec
}}
} else {
rename ::file ::orig_file
proc ::file {m args} {
if {$m eq "home"} {
eval [linsert $args 0 ::tcl::file::home]
} elseif {$m eq "tildeexpand"} {
eval [linsert $args 0 ::tcl::file::tildeexpand]
} else {
eval [linsert $args 0 ::orig_file $m]
}
}
}
return
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