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820 lines
24 KiB
820 lines
24 KiB
5 years ago
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# init.tcl --
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#
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# Default system startup file for Tcl-based applications. Defines
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# "unknown" procedure and auto-load facilities.
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#
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# Copyright (c) 1991-1993 The Regents of the University of California.
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# Copyright (c) 1994-1996 Sun Microsystems, Inc.
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# Copyright (c) 1998-1999 Scriptics Corporation.
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# Copyright (c) 2004 by Kevin B. Kenny. All rights reserved.
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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# This test intentionally written in pre-7.5 Tcl
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if {[info commands package] == ""} {
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error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"
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}
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package require -exact Tcl 8.6.9
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# Compute the auto path to use in this interpreter.
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# The values on the path come from several locations:
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#
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# The environment variable TCLLIBPATH
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#
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# tcl_library, which is the directory containing this init.tcl script.
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# [tclInit] (Tcl_Init()) searches around for the directory containing this
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# init.tcl and defines tcl_library to that location before sourcing it.
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#
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# The parent directory of tcl_library. Adding the parent
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# means that packages in peer directories will be found automatically.
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#
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# Also add the directory ../lib relative to the directory where the
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# executable is located. This is meant to find binary packages for the
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# same architecture as the current executable.
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#
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# tcl_pkgPath, which is set by the platform-specific initialization routines
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# On UNIX it is compiled in
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# On Windows, it is not used
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if {![info exists auto_path]} {
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if {[info exists env(TCLLIBPATH)]} {
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set auto_path $env(TCLLIBPATH)
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} else {
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set auto_path ""
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}
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}
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namespace eval tcl {
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variable Dir
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foreach Dir [list $::tcl_library [file dirname $::tcl_library]] {
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if {$Dir ni $::auto_path} {
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lappend ::auto_path $Dir
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}
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}
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set Dir [file join [file dirname [file dirname \
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[info nameofexecutable]]] lib]
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if {$Dir ni $::auto_path} {
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lappend ::auto_path $Dir
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}
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catch {
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foreach Dir $::tcl_pkgPath {
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if {$Dir ni $::auto_path} {
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lappend ::auto_path $Dir
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}
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}
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}
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if {![interp issafe]} {
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variable Path [encoding dirs]
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set Dir [file join $::tcl_library encoding]
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if {$Dir ni $Path} {
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lappend Path $Dir
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encoding dirs $Path
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}
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}
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# TIP #255 min and max functions
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namespace eval mathfunc {
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proc min {args} {
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if {![llength $args]} {
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return -code error \
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"too few arguments to math function \"min\""
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}
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set val Inf
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foreach arg $args {
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# This will handle forcing the numeric value without
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# ruining the internal type of a numeric object
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if {[catch {expr {double($arg)}} err]} {
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return -code error $err
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}
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if {$arg < $val} {set val $arg}
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}
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return $val
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}
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proc max {args} {
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if {![llength $args]} {
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return -code error \
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"too few arguments to math function \"max\""
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}
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set val -Inf
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foreach arg $args {
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# This will handle forcing the numeric value without
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# ruining the internal type of a numeric object
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if {[catch {expr {double($arg)}} err]} {
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return -code error $err
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}
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if {$arg > $val} {set val $arg}
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}
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return $val
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}
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namespace export min max
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}
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}
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# Windows specific end of initialization
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if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} {
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namespace eval tcl {
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proc EnvTraceProc {lo n1 n2 op} {
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global env
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set x $env($n2)
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set env($lo) $x
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set env([string toupper $lo]) $x
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}
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proc InitWinEnv {} {
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global env tcl_platform
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foreach p [array names env] {
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set u [string toupper $p]
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if {$u ne $p} {
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switch -- $u {
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COMSPEC -
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PATH {
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set temp $env($p)
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unset env($p)
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set env($u) $temp
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trace add variable env($p) write \
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[namespace code [list EnvTraceProc $p]]
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trace add variable env($u) write \
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[namespace code [list EnvTraceProc $p]]
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}
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}
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}
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}
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if {![info exists env(COMSPEC)]} {
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set env(COMSPEC) cmd.exe
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}
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}
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InitWinEnv
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}
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}
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# Setup the unknown package handler
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if {[interp issafe]} {
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package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
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} else {
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# Set up search for Tcl Modules (TIP #189).
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# and setup platform specific unknown package handlers
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if {$tcl_platform(os) eq "Darwin"
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&& $tcl_platform(platform) eq "unix"} {
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package unknown {::tcl::tm::UnknownHandler \
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{::tcl::MacOSXPkgUnknown ::tclPkgUnknown}}
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} else {
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package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
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}
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# Set up the 'clock' ensemble
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namespace eval ::tcl::clock [list variable TclLibDir $::tcl_library]
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proc ::tcl::initClock {} {
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# Auto-loading stubs for 'clock.tcl'
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foreach cmd {add format scan} {
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proc ::tcl::clock::$cmd args {
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variable TclLibDir
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source -encoding utf-8 [file join $TclLibDir clock.tcl]
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return [uplevel 1 [info level 0]]
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}
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}
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rename ::tcl::initClock {}
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}
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::tcl::initClock
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}
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# Conditionalize for presence of exec.
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if {[namespace which -command exec] eq ""} {
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# Some machines do not have exec. Also, on all
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# platforms, safe interpreters do not have exec.
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set auto_noexec 1
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}
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# Define a log command (which can be overwitten to log errors
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# differently, specially when stderr is not available)
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if {[namespace which -command tclLog] eq ""} {
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proc tclLog {string} {
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catch {puts stderr $string}
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}
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}
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# unknown --
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# This procedure is called when a Tcl command is invoked that doesn't
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# exist in the interpreter. It takes the following steps to make the
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# command available:
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#
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# 1. See if the autoload facility can locate the command in a
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# Tcl script file. If so, load it and execute it.
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# 2. If the command was invoked interactively at top-level:
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# (a) see if the command exists as an executable UNIX program.
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# If so, "exec" the command.
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# (b) see if the command requests csh-like history substitution
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# in one of the common forms !!, !<number>, or ^old^new. If
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# so, emulate csh's history substitution.
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# (c) see if the command is a unique abbreviation for another
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# command. If so, invoke the command.
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#
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# Arguments:
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# args - A list whose elements are the words of the original
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# command, including the command name.
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proc unknown args {
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variable ::tcl::UnknownPending
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global auto_noexec auto_noload env tcl_interactive errorInfo errorCode
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if {[info exists errorInfo]} {
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set savedErrorInfo $errorInfo
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}
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if {[info exists errorCode]} {
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set savedErrorCode $errorCode
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}
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set name [lindex $args 0]
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if {![info exists auto_noload]} {
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#
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# Make sure we're not trying to load the same proc twice.
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#
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if {[info exists UnknownPending($name)]} {
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return -code error "self-referential recursion\
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in \"unknown\" for command \"$name\""
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}
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set UnknownPending($name) pending
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set ret [catch {
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auto_load $name [uplevel 1 {::namespace current}]
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} msg opts]
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unset UnknownPending($name)
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if {$ret != 0} {
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dict append opts -errorinfo "\n (autoloading \"$name\")"
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return -options $opts $msg
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}
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if {![array size UnknownPending]} {
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unset UnknownPending
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}
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if {$msg} {
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if {[info exists savedErrorCode]} {
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set ::errorCode $savedErrorCode
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} else {
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unset -nocomplain ::errorCode
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}
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if {[info exists savedErrorInfo]} {
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set errorInfo $savedErrorInfo
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} else {
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unset -nocomplain errorInfo
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}
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set code [catch {uplevel 1 $args} msg opts]
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if {$code == 1} {
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#
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# Compute stack trace contribution from the [uplevel].
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# Note the dependence on how Tcl_AddErrorInfo, etc.
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# construct the stack trace.
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#
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set errInfo [dict get $opts -errorinfo]
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set errCode [dict get $opts -errorcode]
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set cinfo $args
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if {[string bytelength $cinfo] > 150} {
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set cinfo [string range $cinfo 0 150]
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while {[string bytelength $cinfo] > 150} {
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set cinfo [string range $cinfo 0 end-1]
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}
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append cinfo ...
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}
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set tail "\n (\"uplevel\" body line 1)\n invoked\
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from within\n\"uplevel 1 \$args\""
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set expect "$msg\n while executing\n\"$cinfo\"$tail"
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if {$errInfo eq $expect} {
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#
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# The stack has only the eval from the expanded command
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# Do not generate any stack trace here.
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#
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dict unset opts -errorinfo
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dict incr opts -level
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return -options $opts $msg
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}
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#
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# Stack trace is nested, trim off just the contribution
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# from the extra "eval" of $args due to the "catch" above.
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#
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set last [string last $tail $errInfo]
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if {$last + [string length $tail] != [string length $errInfo]} {
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# Very likely cannot happen
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return -options $opts $msg
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}
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set errInfo [string range $errInfo 0 $last-1]
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set tail "\"$cinfo\""
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set last [string last $tail $errInfo]
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if {$last + [string length $tail] != [string length $errInfo]} {
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return -code error -errorcode $errCode \
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-errorinfo $errInfo $msg
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}
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set errInfo [string range $errInfo 0 $last-1]
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set tail "\n invoked from within\n"
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set last [string last $tail $errInfo]
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if {$last + [string length $tail] == [string length $errInfo]} {
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return -code error -errorcode $errCode \
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-errorinfo [string range $errInfo 0 $last-1] $msg
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}
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set tail "\n while executing\n"
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set last [string last $tail $errInfo]
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if {$last + [string length $tail] == [string length $errInfo]} {
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return -code error -errorcode $errCode \
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-errorinfo [string range $errInfo 0 $last-1] $msg
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}
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return -options $opts $msg
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} else {
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dict incr opts -level
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return -options $opts $msg
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}
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}
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}
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if {([info level] == 1) && ([info script] eq "")
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&& [info exists tcl_interactive] && $tcl_interactive} {
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if {![info exists auto_noexec]} {
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set new [auto_execok $name]
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if {$new ne ""} {
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set redir ""
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if {[namespace which -command console] eq ""} {
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set redir ">&@stdout <@stdin"
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}
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uplevel 1 [list ::catch \
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[concat exec $redir $new [lrange $args 1 end]] \
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::tcl::UnknownResult ::tcl::UnknownOptions]
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dict incr ::tcl::UnknownOptions -level
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return -options $::tcl::UnknownOptions $::tcl::UnknownResult
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}
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}
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if {$name eq "!!"} {
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set newcmd [history event]
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} elseif {[regexp {^!(.+)$} $name -> event]} {
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set newcmd [history event $event]
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} elseif {[regexp {^\^([^^]*)\^([^^]*)\^?$} $name -> old new]} {
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set newcmd [history event -1]
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catch {regsub -all -- $old $newcmd $new newcmd}
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}
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if {[info exists newcmd]} {
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tclLog $newcmd
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history change $newcmd 0
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uplevel 1 [list ::catch $newcmd \
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::tcl::UnknownResult ::tcl::UnknownOptions]
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dict incr ::tcl::UnknownOptions -level
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return -options $::tcl::UnknownOptions $::tcl::UnknownResult
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}
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set ret [catch {set candidates [info commands $name*]} msg]
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if {$name eq "::"} {
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set name ""
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}
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if {$ret != 0} {
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dict append opts -errorinfo \
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"\n (expanding command prefix \"$name\" in unknown)"
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return -options $opts $msg
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}
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# Filter out bogus matches when $name contained
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||
|
|
# a glob-special char [Bug 946952]
|
||
|
|
if {$name eq ""} {
|
||
|
|
# Handle empty $name separately due to strangeness
|
||
|
|
# in [string first] (See RFE 1243354)
|
||
|
|
set cmds $candidates
|
||
|
|
} else {
|
||
|
|
set cmds [list]
|
||
|
|
foreach x $candidates {
|
||
|
|
if {[string first $name $x] == 0} {
|
||
|
|
lappend cmds $x
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {[llength $cmds] == 1} {
|
||
|
|
uplevel 1 [list ::catch [lreplace $args 0 0 [lindex $cmds 0]] \
|
||
|
|
::tcl::UnknownResult ::tcl::UnknownOptions]
|
||
|
|
dict incr ::tcl::UnknownOptions -level
|
||
|
|
return -options $::tcl::UnknownOptions $::tcl::UnknownResult
|
||
|
|
}
|
||
|
|
if {[llength $cmds]} {
|
||
|
|
return -code error "ambiguous command name \"$name\": [lsort $cmds]"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -code error -errorcode [list TCL LOOKUP COMMAND $name] \
|
||
|
|
"invalid command name \"$name\""
|
||
|
|
}
|
||
|
|
|
||
|
|
# auto_load --
|
||
|
|
# Checks a collection of library directories to see if a procedure
|
||
|
|
# is defined in one of them. If so, it sources the appropriate
|
||
|
|
# library file to create the procedure. Returns 1 if it successfully
|
||
|
|
# loaded the procedure, 0 otherwise.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# cmd - Name of the command to find and load.
|
||
|
|
# namespace (optional) The namespace where the command is being used - must be
|
||
|
|
# a canonical namespace as returned [namespace current]
|
||
|
|
# for instance. If not given, namespace current is used.
|
||
|
|
|
||
|
|
proc auto_load {cmd {namespace {}}} {
|
||
|
|
global auto_index auto_path
|
||
|
|
|
||
|
|
if {$namespace eq ""} {
|
||
|
|
set namespace [uplevel 1 [list ::namespace current]]
|
||
|
|
}
|
||
|
|
set nameList [auto_qualify $cmd $namespace]
|
||
|
|
# workaround non canonical auto_index entries that might be around
|
||
|
|
# from older auto_mkindex versions
|
||
|
|
lappend nameList $cmd
|
||
|
|
foreach name $nameList {
|
||
|
|
if {[info exists auto_index($name)]} {
|
||
|
|
namespace eval :: $auto_index($name)
|
||
|
|
# There's a couple of ways to look for a command of a given
|
||
|
|
# name. One is to use
|
||
|
|
# info commands $name
|
||
|
|
# Unfortunately, if the name has glob-magic chars in it like *
|
||
|
|
# or [], it may not match. For our purposes here, a better
|
||
|
|
# route is to use
|
||
|
|
# namespace which -command $name
|
||
|
|
if {[namespace which -command $name] ne ""} {
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {![info exists auto_path]} {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
if {![auto_load_index]} {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
foreach name $nameList {
|
||
|
|
if {[info exists auto_index($name)]} {
|
||
|
|
namespace eval :: $auto_index($name)
|
||
|
|
if {[namespace which -command $name] ne ""} {
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
# auto_load_index --
|
||
|
|
# Loads the contents of tclIndex files on the auto_path directory
|
||
|
|
# list. This is usually invoked within auto_load to load the index
|
||
|
|
# of available commands. Returns 1 if the index is loaded, and 0 if
|
||
|
|
# the index is already loaded and up to date.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# None.
|
||
|
|
|
||
|
|
proc auto_load_index {} {
|
||
|
|
variable ::tcl::auto_oldpath
|
||
|
|
global auto_index auto_path
|
||
|
|
|
||
|
|
if {[info exists auto_oldpath] && ($auto_oldpath eq $auto_path)} {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
set auto_oldpath $auto_path
|
||
|
|
|
||
|
|
# Check if we are a safe interpreter. In that case, we support only
|
||
|
|
# newer format tclIndex files.
|
||
|
|
|
||
|
|
set issafe [interp issafe]
|
||
|
|
for {set i [expr {[llength $auto_path] - 1}]} {$i >= 0} {incr i -1} {
|
||
|
|
set dir [lindex $auto_path $i]
|
||
|
|
set f ""
|
||
|
|
if {$issafe} {
|
||
|
|
catch {source [file join $dir tclIndex]}
|
||
|
|
} elseif {[catch {set f [open [file join $dir tclIndex]]}]} {
|
||
|
|
continue
|
||
|
|
} else {
|
||
|
|
set error [catch {
|
||
|
|
set id [gets $f]
|
||
|
|
if {$id eq "# Tcl autoload index file, version 2.0"} {
|
||
|
|
eval [read $f]
|
||
|
|
} elseif {$id eq "# Tcl autoload index file: each line identifies a Tcl"} {
|
||
|
|
while {[gets $f line] >= 0} {
|
||
|
|
if {([string index $line 0] eq "#") \
|
||
|
|
|| ([llength $line] != 2)} {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
set name [lindex $line 0]
|
||
|
|
set auto_index($name) \
|
||
|
|
"source [file join $dir [lindex $line 1]]"
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
error "[file join $dir tclIndex] isn't a proper Tcl index file"
|
||
|
|
}
|
||
|
|
} msg opts]
|
||
|
|
if {$f ne ""} {
|
||
|
|
close $f
|
||
|
|
}
|
||
|
|
if {$error} {
|
||
|
|
return -options $opts $msg
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
|
||
|
|
# auto_qualify --
|
||
|
|
#
|
||
|
|
# Compute a fully qualified names list for use in the auto_index array.
|
||
|
|
# For historical reasons, commands in the global namespace do not have leading
|
||
|
|
# :: in the index key. The list has two elements when the command name is
|
||
|
|
# relative (no leading ::) and the namespace is not the global one. Otherwise
|
||
|
|
# only one name is returned (and searched in the auto_index).
|
||
|
|
#
|
||
|
|
# Arguments -
|
||
|
|
# cmd The command name. Can be any name accepted for command
|
||
|
|
# invocations (Like "foo::::bar").
|
||
|
|
# namespace The namespace where the command is being used - must be
|
||
|
|
# a canonical namespace as returned by [namespace current]
|
||
|
|
# for instance.
|
||
|
|
|
||
|
|
proc auto_qualify {cmd namespace} {
|
||
|
|
|
||
|
|
# count separators and clean them up
|
||
|
|
# (making sure that foo:::::bar will be treated as foo::bar)
|
||
|
|
set n [regsub -all {::+} $cmd :: cmd]
|
||
|
|
|
||
|
|
# Ignore namespace if the name starts with ::
|
||
|
|
# Handle special case of only leading ::
|
||
|
|
|
||
|
|
# Before each return case we give an example of which category it is
|
||
|
|
# with the following form :
|
||
|
|
# (inputCmd, inputNameSpace) -> output
|
||
|
|
|
||
|
|
if {[string match ::* $cmd]} {
|
||
|
|
if {$n > 1} {
|
||
|
|
# (::foo::bar , *) -> ::foo::bar
|
||
|
|
return [list $cmd]
|
||
|
|
} else {
|
||
|
|
# (::global , *) -> global
|
||
|
|
return [list [string range $cmd 2 end]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Potentially returning 2 elements to try :
|
||
|
|
# (if the current namespace is not the global one)
|
||
|
|
|
||
|
|
if {$n == 0} {
|
||
|
|
if {$namespace eq "::"} {
|
||
|
|
# (nocolons , ::) -> nocolons
|
||
|
|
return [list $cmd]
|
||
|
|
} else {
|
||
|
|
# (nocolons , ::sub) -> ::sub::nocolons nocolons
|
||
|
|
return [list ${namespace}::$cmd $cmd]
|
||
|
|
}
|
||
|
|
} elseif {$namespace eq "::"} {
|
||
|
|
# (foo::bar , ::) -> ::foo::bar
|
||
|
|
return [list ::$cmd]
|
||
|
|
} else {
|
||
|
|
# (foo::bar , ::sub) -> ::sub::foo::bar ::foo::bar
|
||
|
|
return [list ${namespace}::$cmd ::$cmd]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# auto_import --
|
||
|
|
#
|
||
|
|
# Invoked during "namespace import" to make see if the imported commands
|
||
|
|
# reside in an autoloaded library. If so, the commands are loaded so
|
||
|
|
# that they will be available for the import links. If not, then this
|
||
|
|
# procedure does nothing.
|
||
|
|
#
|
||
|
|
# Arguments -
|
||
|
|
# pattern The pattern of commands being imported (like "foo::*")
|
||
|
|
# a canonical namespace as returned by [namespace current]
|
||
|
|
|
||
|
|
proc auto_import {pattern} {
|
||
|
|
global auto_index
|
||
|
|
|
||
|
|
# If no namespace is specified, this will be an error case
|
||
|
|
|
||
|
|
if {![string match *::* $pattern]} {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
set ns [uplevel 1 [list ::namespace current]]
|
||
|
|
set patternList [auto_qualify $pattern $ns]
|
||
|
|
|
||
|
|
auto_load_index
|
||
|
|
|
||
|
|
foreach pattern $patternList {
|
||
|
|
foreach name [array names auto_index $pattern] {
|
||
|
|
if {([namespace which -command $name] eq "")
|
||
|
|
&& ([namespace qualifiers $pattern] eq [namespace qualifiers $name])} {
|
||
|
|
namespace eval :: $auto_index($name)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# auto_execok --
|
||
|
|
#
|
||
|
|
# Returns string that indicates name of program to execute if
|
||
|
|
# name corresponds to a shell builtin or an executable in the
|
||
|
|
# Windows search path, or "" otherwise. Builds an associative
|
||
|
|
# array auto_execs that caches information about previous checks,
|
||
|
|
# for speed.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# name - Name of a command.
|
||
|
|
|
||
|
|
if {$tcl_platform(platform) eq "windows"} {
|
||
|
|
# Windows version.
|
||
|
|
#
|
||
|
|
# Note that file executable doesn't work under Windows, so we have to
|
||
|
|
# look for files with .exe, .com, or .bat extensions. Also, the path
|
||
|
|
# may be in the Path or PATH environment variables, and path
|
||
|
|
# components are separated with semicolons, not colons as under Unix.
|
||
|
|
#
|
||
|
|
proc auto_execok name {
|
||
|
|
global auto_execs env tcl_platform
|
||
|
|
|
||
|
|
if {[info exists auto_execs($name)]} {
|
||
|
|
return $auto_execs($name)
|
||
|
|
}
|
||
|
|
set auto_execs($name) ""
|
||
|
|
|
||
|
|
set shellBuiltins [list assoc cls copy date del dir echo erase ftype \
|
||
|
|
md mkdir mklink move rd ren rename rmdir start time type ver vol]
|
||
|
|
if {[info exists env(PATHEXT)]} {
|
||
|
|
# Add an initial ; to have the {} extension check first.
|
||
|
|
set execExtensions [split ";$env(PATHEXT)" ";"]
|
||
|
|
} else {
|
||
|
|
set execExtensions [list {} .com .exe .bat .cmd]
|
||
|
|
}
|
||
|
|
|
||
|
|
if {[string tolower $name] in $shellBuiltins} {
|
||
|
|
# When this is command.com for some reason on Win2K, Tcl won't
|
||
|
|
# exec it unless the case is right, which this corrects. COMSPEC
|
||
|
|
# may not point to a real file, so do the check.
|
||
|
|
set cmd $env(COMSPEC)
|
||
|
|
if {[file exists $cmd]} {
|
||
|
|
set cmd [file attributes $cmd -shortname]
|
||
|
|
}
|
||
|
|
return [set auto_execs($name) [list $cmd /c $name]]
|
||
|
|
}
|
||
|
|
|
||
|
|
if {[llength [file split $name]] != 1} {
|
||
|
|
foreach ext $execExtensions {
|
||
|
|
set file ${name}${ext}
|
||
|
|
if {[file exists $file] && ![file isdirectory $file]} {
|
||
|
|
return [set auto_execs($name) [list $file]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
set path "[file dirname [info nameof]];.;"
|
||
|
|
if {[info exists env(WINDIR)]} {
|
||
|
|
set windir $env(WINDIR)
|
||
|
|
}
|
||
|
|
if {[info exists windir]} {
|
||
|
|
if {$tcl_platform(os) eq "Windows NT"} {
|
||
|
|
append path "$windir/system32;"
|
||
|
|
}
|
||
|
|
append path "$windir/system;$windir;"
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach var {PATH Path path} {
|
||
|
|
if {[info exists env($var)]} {
|
||
|
|
append path ";$env($var)"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ext $execExtensions {
|
||
|
|
unset -nocomplain checked
|
||
|
|
foreach dir [split $path {;}] {
|
||
|
|
# Skip already checked directories
|
||
|
|
if {[info exists checked($dir)] || ($dir eq "")} {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
set checked($dir) {}
|
||
|
|
set file [file join $dir ${name}${ext}]
|
||
|
|
if {[file exists $file] && ![file isdirectory $file]} {
|
||
|
|
return [set auto_execs($name) [list $file]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
# Unix version.
|
||
|
|
#
|
||
|
|
proc auto_execok name {
|
||
|
|
global auto_execs env
|
||
|
|
|
||
|
|
if {[info exists auto_execs($name)]} {
|
||
|
|
return $auto_execs($name)
|
||
|
|
}
|
||
|
|
set auto_execs($name) ""
|
||
|
|
if {[llength [file split $name]] != 1} {
|
||
|
|
if {[file executable $name] && ![file isdirectory $name]} {
|
||
|
|
set auto_execs($name) [list $name]
|
||
|
|
}
|
||
|
|
return $auto_execs($name)
|
||
|
|
}
|
||
|
|
foreach dir [split $env(PATH) :] {
|
||
|
|
if {$dir eq ""} {
|
||
|
|
set dir .
|
||
|
|
}
|
||
|
|
set file [file join $dir $name]
|
||
|
|
if {[file executable $file] && ![file isdirectory $file]} {
|
||
|
|
set auto_execs($name) [list $file]
|
||
|
|
return $auto_execs($name)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ""
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tcl::CopyDirectory --
|
||
|
|
#
|
||
|
|
# This procedure is called by Tcl's core when attempts to call the
|
||
|
|
# filesystem's copydirectory function fail. The semantics of the call
|
||
|
|
# are that 'dest' does not yet exist, i.e. dest should become the exact
|
||
|
|
# image of src. If dest does exist, we throw an error.
|
||
|
|
#
|
||
|
|
# Note that making changes to this procedure can change the results
|
||
|
|
# of running Tcl's tests.
|
||
|
|
#
|
||
|
|
# Arguments:
|
||
|
|
# action - "renaming" or "copying"
|
||
|
|
# src - source directory
|
||
|
|
# dest - destination directory
|
||
|
|
proc tcl::CopyDirectory {action src dest} {
|
||
|
|
set nsrc [file normalize $src]
|
||
|
|
set ndest [file normalize $dest]
|
||
|
|
|
||
|
|
if {$action eq "renaming"} {
|
||
|
|
# Can't rename volumes. We could give a more precise
|
||
|
|
# error message here, but that would break the test suite.
|
||
|
|
if {$nsrc in [file volumes]} {
|
||
|
|
return -code error "error $action \"$src\" to\
|
||
|
|
\"$dest\": trying to rename a volume or move a directory\
|
||
|
|
into itself"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {[file exists $dest]} {
|
||
|
|
if {$nsrc eq $ndest} {
|
||
|
|
return -code error "error $action \"$src\" to\
|
||
|
|
\"$dest\": trying to rename a volume or move a directory\
|
||
|
|
into itself"
|
||
|
|
}
|
||
|
|
if {$action eq "copying"} {
|
||
|
|
# We used to throw an error here, but, looking more closely
|
||
|
|
# at the core copy code in tclFCmd.c, if the destination
|
||
|
|
# exists, then we should only call this function if -force
|
||
|
|
# is true, which means we just want to over-write. So,
|
||
|
|
# the following code is now commented out.
|
||
|
|
#
|
||
|
|
# return -code error "error $action \"$src\" to\
|
||
|
|
# \"$dest\": file already exists"
|
||
|
|
} else {
|
||
|
|
# Depending on the platform, and on the current
|
||
|
|
# working directory, the directories '.', '..'
|
||
|
|
# can be returned in various combinations. Anyway,
|
||
|
|
# if any other file is returned, we must signal an error.
|
||
|
|
set existing [glob -nocomplain -directory $dest * .*]
|
||
|
|
lappend existing {*}[glob -nocomplain -directory $dest \
|
||
|
|
-type hidden * .*]
|
||
|
|
foreach s $existing {
|
||
|
|
if {[file tail $s] ni {. ..}} {
|
||
|
|
return -code error "error $action \"$src\" to\
|
||
|
|
\"$dest\": file already exists"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if {[string first $nsrc $ndest] != -1} {
|
||
|
|
set srclen [expr {[llength [file split $nsrc]] - 1}]
|
||
|
|
set ndest [lindex [file split $ndest] $srclen]
|
||
|
|
if {$ndest eq [file tail $nsrc]} {
|
||
|
|
return -code error "error $action \"$src\" to\
|
||
|
|
\"$dest\": trying to rename a volume or move a directory\
|
||
|
|
into itself"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
file mkdir $dest
|
||
|
|
}
|
||
|
|
# Have to be careful to capture both visible and hidden files.
|
||
|
|
# We will also be more generous to the file system and not
|
||
|
|
# assume the hidden and non-hidden lists are non-overlapping.
|
||
|
|
#
|
||
|
|
# On Unix 'hidden' files begin with '.'. On other platforms
|
||
|
|
# or filesystems hidden files may have other interpretations.
|
||
|
|
set filelist [concat [glob -nocomplain -directory $src *] \
|
||
|
|
[glob -nocomplain -directory $src -types hidden *]]
|
||
|
|
|
||
|
|
foreach s [lsort -unique $filelist] {
|
||
|
|
if {[file tail $s] ni {. ..}} {
|
||
|
|
file copy -force -- $s [file join $dest [file tail $s]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|