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|
# init.tcl --
#
# Default system startup file for Tcl-based applications. Defines
# "unknown" procedure and auto-load facilities.
#
# SCCS: %Z% $Id: init.tcl,v 1.5 1998/07/11 13:07:06 welch Exp $
#
# Copyright (c) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
if {[info commands package] == ""} {
error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"
}
package require -exact Tcl 8.0
# Compute the auto path to use in this interpreter.
# (auto_path could be already set, in safe interps for instance)
if {![info exists auto_path]} {
if {[catch {set auto_path $env(TCLLIBPATH)}]} {
set auto_path ""
}
}
if {[lsearch -exact $auto_path [info library]] < 0} {
lappend auto_path [info library]
}
catch {
foreach __dir $tcl_pkgPath {
if {[lsearch -exact $auto_path $__dir] < 0} {
lappend auto_path $__dir
}
}
unset __dir
}
# Windows specific end of initialization
if {(![interp issafe]) && ($tcl_platform(platform) == "windows")} {
namespace eval tcl {
proc envTraceProc {lo n1 n2 op} {
set x $::env($n2)
set ::env($lo) $x
set ::env([string toupper $lo]) $x
}
}
foreach p [array names env] {
set u [string toupper $p]
if {$u != $p} {
switch -- $u {
COMSPEC -
PATH {
if {![info exists env($u)]} {
set env($u) $env($p)
}
trace variable env($p) w [list tcl::envTraceProc $p]
trace variable env($u) w [list tcl::envTraceProc $p]
}
}
}
}
if {![info exists env(COMSPEC)]} {
if {$tcl_platform(os) == {Windows NT}} {
set env(COMSPEC) cmd.exe
} else {
set env(COMSPEC) command.com
}
}
}
# Setup the unknown package handler
package unknown tclPkgUnknown
# Conditionalize for presence of exec.
if {[info commands exec] == ""} {
# Some machines, such as the Macintosh, do not have exec. Also, on all
# platforms, safe interpreters do not have exec.
set auto_noexec 1
}
set errorCode ""
set errorInfo ""
# Define a log command (which can be overwitten to log errors
# differently, specially when stderr is not available)
if {[info commands tclLog] == ""} {
proc tclLog {string} {
catch {puts stderr $string}
}
}
# The procs defined in this file that have a leading space
# are 'hidden' from auto_mkindex because they are not
# auto-loadable.
# unknown --
# This procedure is called when a Tcl command is invoked that doesn't
# exist in the interpreter. It takes the following steps to make the
# command available:
#
# 1. See if the autoload facility can locate the command in a
# Tcl script file. If so, load it and execute it.
# 2. If the command was invoked interactively at top-level:
# (a) see if the command exists as an executable UNIX program.
# If so, "exec" the command.
# (b) see if the command requests csh-like history substitution
# in one of the common forms !!, !<number>, or ^old^new. If
# so, emulate csh's history substitution.
# (c) see if the command is a unique abbreviation for another
# command. If so, invoke the command.
#
# Arguments:
# args - A list whose elements are the words of the original
# command, including the command name.
proc unknown args {
global auto_noexec auto_noload env unknown_pending tcl_interactive
global errorCode errorInfo
# Save the values of errorCode and errorInfo variables, since they
# may get modified if caught errors occur below. The variables will
# be restored just before re-executing the missing command.
set savedErrorCode $errorCode
set savedErrorInfo $errorInfo
set name [lindex $args 0]
if {![info exists auto_noload]} {
#
# Make sure we're not trying to load the same proc twice.
#
if {[info exists unknown_pending($name)]} {
return -code error "self-referential recursion in \"unknown\" for command \"$name\"";
}
set unknown_pending($name) pending;
set ret [catch {auto_load $name [uplevel 1 {namespace current}]} msg]
unset unknown_pending($name);
if {$ret != 0} {
return -code $ret -errorcode $errorCode \
"error while autoloading \"$name\": $msg"
}
if {![array size unknown_pending]} {
unset unknown_pending
}
if {$msg} {
set errorCode $savedErrorCode
set errorInfo $savedErrorInfo
set code [catch {uplevel 1 $args} msg]
if {$code == 1} {
#
# Strip the last five lines off the error stack (they're
# from the "uplevel" command).
#
set new [split $errorInfo \n]
set new [join [lrange $new 0 [expr {[llength $new] - 6}]] \n]
return -code error -errorcode $errorCode \
-errorinfo $new $msg
} else {
return -code $code $msg
}
}
}
if {([info level] == 1) && ([info script] == "") \
&& [info exists tcl_interactive] && $tcl_interactive} {
if {![info exists auto_noexec]} {
set new [auto_execok $name]
if {$new != ""} {
set errorCode $savedErrorCode
set errorInfo $savedErrorInfo
set redir ""
if {[info commands console] == ""} {
set redir ">&@stdout <@stdin"
}
return [uplevel exec $redir $new [lrange $args 1 end]]
}
}
set errorCode $savedErrorCode
set errorInfo $savedErrorInfo
if {$name == "!!"} {
set newcmd [history event]
} elseif {[regexp {^!(.+)$} $name dummy event]} {
set newcmd [history event $event]
} elseif {[regexp {^\^([^^]*)\^([^^]*)\^?$} $name dummy old new]} {
set newcmd [history event -1]
catch {regsub -all -- $old $newcmd $new newcmd}
}
if {[info exists newcmd]} {
tclLog $newcmd
history change $newcmd 0
return [uplevel $newcmd]
}
set ret [catch {set cmds [info commands $name*]} msg]
if {[string compare $name "::"] == 0} {
set name ""
}
if {$ret != 0} {
return -code $ret -errorcode $errorCode \
"error in unknown while checking if \"$name\" is a unique command abbreviation: $msg"
}
if {[llength $cmds] == 1} {
return [uplevel [lreplace $args 0 0 $cmds]]
}
if {[llength $cmds] != 0} {
if {$name == ""} {
return -code error "empty command name \"\""
} else {
return -code error \
"ambiguous command name \"$name\": [lsort $cmds]"
}
}
}
return -code error "invalid command name \"$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_oldpath auto_path env errorInfo errorCode
if {[string length $namespace] == 0} {
set namespace [uplevel {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)]} {
uplevel #0 $auto_index($name)
return [expr {[info commands $name] != ""}]
}
}
if {![info exists auto_path]} {
return 0
}
if {[info exists auto_oldpath]} {
if {$auto_oldpath == $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 == "# Tcl autoload index file, version 2.0"} {
eval [read $f]
} elseif {$id == \
"# Tcl autoload index file: each line identifies a Tcl"} {
while {[gets $f line] >= 0} {
if {([string index $line 0] == "#")
|| ([llength $line] != 2)} {
continue
}
set name [lindex $line 0]
set auto_index($name) \
"source [file join $dir [lindex $line 1]]"
}
} else {
error \
"[file join $dir tclIndex] isn't a proper Tcl index file"
}
} msg]
if {$f != ""} {
close $f
}
if {$error} {
error $msg $errorInfo $errorCode
}
}
}
foreach name $nameList {
if {[info exists auto_index($name)]} {
uplevel #0 $auto_index($name)
if {[info commands $name] != ""} {
return 1
}
}
}
return 0
}
# 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 {::+} $cmd :: cmd]
# Ignore namespace if the name starts with ::
# Handle special case of only leading ::
# Before each return case we give an example of which category it is
# with the following form :
# ( inputCmd, inputNameSpace) -> output
if {[regexp {^::(.*)$} $cmd x tail]} {
if {$n > 1} {
# ( ::foo::bar , * ) -> ::foo::bar
return [list $cmd]
} else {
# ( ::global , * ) -> global
return [list $tail]
}
}
# Potentially returning 2 elements to try :
# (if the current namespace is not the global one)
if {$n == 0} {
if {[string compare $namespace ::] == 0} {
# ( nocolons , :: ) -> nocolons
return [list $cmd]
} else {
# ( nocolons , ::sub ) -> ::sub::nocolons nocolons
return [list ${namespace}::$cmd $cmd]
}
} else {
if {[string compare $namespace ::] == 0} {
# ( foo::bar , :: ) -> ::foo::bar
return [list ::$cmd]
} else {
# ( foo::bar , ::sub ) -> ::sub::foo::bar ::foo::bar
return [list ${namespace}::$cmd ::$cmd]
}
}
}
if {[string compare $tcl_platform(platform) windows] == 0} {
# auto_execok --
#
# Returns string that indicates name of program to execute if
# name corresponds to a shell builtin or an executable in the
# Windows search path, or "" otherwise. Builds an associative
# array auto_execs that caches information about previous checks,
# for speed.
#
# Arguments:
# name - Name of a command.
# Windows version.
#
# Note that info executable doesn't work under Windows, so we have to
# look for files with .exe, .com, or .bat extensions. Also, the path
# may be in the Path or PATH environment variables, and path
# components are separated with semicolons, not colons as under Unix.
#
proc auto_execok name {
global auto_execs env tcl_platform
if {[info exists auto_execs($name)]} {
return $auto_execs($name)
}
set auto_execs($name) ""
if {[lsearch -exact {cls copy date del erase dir echo mkdir md rename
ren rmdir rd time type ver vol} $name] != -1} {
return [set auto_execs($name) [list $env(COMSPEC) /c $name]]
}
if {[llength [file split $name]] != 1} {
foreach ext {{} .com .exe .bat} {
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) == "Windows NT"} {
append path "$windir/system32;"
}
append path "$windir/system;$windir;"
}
if {[info exists env(PATH)]} {
append path $env(PATH)
}
foreach dir [split $path {;}] {
if {$dir == ""} {
set dir .
}
foreach ext {{} .com .exe .bat} {
set file [file join $dir ${name}${ext}]
if {[file exists $file] && ![file isdirectory $file]} {
return [set auto_execs($name) [list $file]]
}
}
}
return ""
}
} else {
# auto_execok --
#
# Returns string that indicates name of program to execute if
# name corresponds to an executable in the path. Builds an associative
# array auto_execs that caches information about previous checks,
# for speed.
#
# Arguments:
# name - Name of a command.
# Unix version.
#
proc auto_execok name {
global auto_execs env
if {[info exists auto_execs($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 == ""} {
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 ""
}
}
# auto_reset --
# Destroy all cached information for auto-loading and auto-execution,
# so that the information gets recomputed the next time it's needed.
# Also delete any procedures that are listed in the auto-load index
# except those defined in this file.
#
# Arguments:
# None.
proc auto_reset {} {
global auto_execs auto_index auto_oldpath
foreach p [info procs] {
if {[info exists auto_index($p)] && ![string match auto_* $p]
&& ([lsearch -exact {unknown pkg_mkIndex tclPkgSetup
tclMacPkgSearch tclPkgUnknown} $p] < 0)} {
rename $p {}
}
}
catch {unset auto_execs}
catch {unset auto_index}
catch {unset auto_oldpath}
}
# auto_mkindex --
# Regenerate a tclIndex file from Tcl source files. Takes as argument
# the name of the directory in which the tclIndex file is to be placed,
# followed by any number of glob patterns to use in that directory to
# locate all of the relevant files. It does not parse or source the file
# so the generated index will not contain the appropriate namespace qualifiers
# if you don't explicitly specify it.
#
# Arguments:
# dir - Name of the directory in which to create an index.
# args - Any number of additional arguments giving the
# names of files within dir. If no additional
# are given auto_mkindex will look for *.tcl.
proc auto_mkindex {dir args} {
global errorCode errorInfo
set oldDir [pwd]
cd $dir
set dir [pwd]
append index "# Tcl autoload index file, version 2.0\n"
append index "# This file is generated by the \"auto_mkindex\" command\n"
append index "# and sourced to set up indexing information for one or\n"
append index "# more commands. Typically each line is a command that\n"
append index "# sets an element in the auto_index array, where the\n"
append index "# element name is the name of a command and the value is\n"
append index "# a script that loads the command.\n\n"
if {$args == ""} {
set args *.tcl
}
foreach file [eval glob $args] {
set f ""
set error [catch {
set f [open $file]
while {[gets $f line] >= 0} {
if {[regexp {^proc[ ]+([^ ]*)} $line match procName]} {
set procName [lindex [auto_qualify $procName "::"] 0]
append index "set [list auto_index($procName)]"
append index " \[list source \[file join \$dir [list $file]\]\]\n"
}
}
close $f
} msg]
if {$error} {
set code $errorCode
set info $errorInfo
catch {close $f}
cd $oldDir
error $msg $info $code
}
}
set f ""
set error [catch {
set f [open tclIndex w]
puts $f $index nonewline
close $f
cd $oldDir
} msg]
if {$error} {
set code $errorCode
set info $errorInfo
catch {close $f}
cd $oldDir
error $msg $info $code
}
}
# pkg_mkIndex --
# This procedure creates a package index in a given directory. The
# package index consists of a "pkgIndex.tcl" file whose contents are
# a Tcl script that sets up package information with "package require"
# commands. The commands describe all of the packages defined by the
# files given as arguments.
#
# Arguments:
# -direct (optional) If this flag is present, the generated
# code in pkgMkIndex.tcl will cause the package to be
# loaded when "package require" is executed, rather
# than lazily when the first reference to an exported
# procedure in the package is made.
# -nopkgrequire (optional) If this flag is present, "package require"
# commands are ignored. This flag is useful in some
# situations, for example when there is a circularity
# in package requires (package a requires package b,
# which in turns requires package a).
# dir - Name of the directory in which to create the index.
# args - Any number of additional arguments, each giving
# a glob pattern that matches the names of one or
# more shared libraries or Tcl script files in
# dir.
proc pkg_mkIndex {args} {
global errorCode errorInfo
set usage {"pkg_mkIndex ?-nopkgrequire? ?-direct? dir ?pattern ...?"};
set argCount [llength $args]
if {$argCount < 1} {
return -code error "wrong # args: should be\n$usage"
}
set more ""
set direct 0
set noPkgRequire 0
for {set idx 0} {$idx < $argCount} {incr idx} {
set flag [lindex $args $idx]
switch -glob -- $flag {
-- {
# done with the flags
incr idx
break
}
-direct {
set direct 1
append more " -direct"
}
-nopkgrequire {
set noPkgRequire 1
append more " -nopkgrequire"
}
-* {
return -code error "unknown flag $flag: should be\n$usage"
}
default {
# done with the flags
break
}
}
}
set dir [lindex $args $idx]
set patternList [lrange $args [expr $idx + 1] end]
if {[llength $patternList] == 0} {
set patternList [list "*.tcl" "*[info sharedlibextension]"]
}
append index "# Tcl package index file, version 1.1\n"
append index "# This file is generated by the \"pkg_mkIndex$more\" command\n"
append index "# and sourced either when an application starts up or\n"
append index "# by a \"package unknown\" script. It invokes the\n"
append index "# \"package ifneeded\" command to set up package-related\n"
append index "# information so that packages will be loaded automatically\n"
append index "# in response to \"package require\" commands. When this\n"
append index "# script is sourced, the variable \$dir must contain the\n"
append index "# full path name of this file's directory.\n"
set oldDir [pwd]
cd $dir
# In order to support building of index files from scratch, we make
# repeated passes on the files to index, until either all have been
# indexed, or we can no longer make any headway.
foreach file [eval glob $patternList] {
set toProcess($file) 1
}
while {[array size toProcess] > 0} {
set processed 0
foreach file [array names toProcess] {
# For each file, figure out what commands and packages it provides.
# To do this, create a child interpreter, load the file into the
# interpreter, and get a list of the new commands and packages
# that are defined. The interpeter uses a special version of
# tclPkgSetup to force loading of required packages at require
# time rather than lazily, so that we can keep track of commands
# and packages that are defined indirectly rather than from the
# file itself.
set c [interp create]
# Load into the child all packages currently loaded in the parent
# interpreter, in case the extension depends on some of them.
foreach pkg [info loaded] {
if {[lindex $pkg 1] == "Tk"} {
$c eval {set argv {-geometry +0+0}}
}
load [lindex $pkg 0] [lindex $pkg 1] $c
}
# We also call package ifneeded for all packages that have been
# identified so far. This way, each pass will have loaded the
# equivalent of the pkgIndex.tcl file that we are constructing,
# and packages whose processing failed in previous passes may
# be processed successfully now
foreach pkg [array names files] {
$c eval "package ifneeded $pkg\
\[list tclPkgSetup $dir \
[lrange $pkg 0 0] [lrange $pkg 1 1]\
[list $files($pkg)]\]"
}
if {$noPkgRequire == 1} {
$c eval {
rename package __package_orig
proc package {what args} {
switch -- $what {
require { return ; # ignore transitive requires }
default { eval __package_orig {$what} $args }
}
}
proc __dummy args {}
package unknown __dummy
}
} else {
$c eval {
rename package __package_orig
proc package {what args} {
switch -- $what {
require {
eval __package_orig require $args
# a package that was required needs to be
# placed in the list of packages to ignore.
# tclPkgSetup is unable to do it, so do it
# here.
set ::__ignorePkgs([lindex $args 0]) 1
}
provide {
# if package provide is called at level 1 and
# with two arguments, then this package is
# being provided by one of the files we are
# indexing, and therefore we need to add it
# to the list of packages to write out.
# We need to do this check because otherwise
# packages that are spread over multiple
# files are indexed only by their first file
# loaded.
# Note that packages that this cannot catch
# packages that are implemented by a
# combination of TCL files and DLLs
if {([info level] == 1) \
&& ([llength $args] == 2)} {
lappend ::__providedPkgs [lindex $args 0]
}
eval __package_orig provide $args
}
default { eval __package_orig {$what} $args }
}
}
}
}
$c eval [list set __file $file]
$c eval [list set __direct $direct]
if {[catch {
$c eval {
set __doingWhat "loading or sourcing"
# override the tclPkgSetup procedure (which is called by
# package ifneeded statements from pkgIndex.tcl) to force
# loads of packages, and also keep track of
# packages/namespaces/commands that the load generated
proc tclPkgSetup {dir pkg version files} {
# remember the current set of packages and commands,
# so that we can add any that were defined by the
# package files to the list of packages and commands
# to ignore
foreach __p [package names] {
set __localIgnorePkgs($__p) 1
}
foreach __ns [__pkgGetAllNamespaces] {
set __localIgnoreNs($__ns) 1
}
foreach __cmd [info commands] {
set __localIgnoreCmds($__cmd) 1
}
# load the files that make up the package
package provide $pkg $version
foreach __fileInfo $files {
set __f [lindex $__fileInfo 0]
set __type [lindex $__fileInfo 1]
if {$__type == "load"} {
load [file join $dir $__f] $pkg
} else {
source [file join $dir $__f]
}
}
# packages and commands that were defined by these
# files are to be ignored.
foreach __p [package names] {
if {[info exists __localIgnorePkgs($__p)] == 0} {
set ::__ignorePkgs($__p) 1
}
}
foreach __ns [__pkgGetAllNamespaces] {
if {([info exists __localIgnoreNs($__ns)] == 0) \
&& ([info exists ::__ignoreNs($__ns)] == 0)} {
namespace import ${__ns}::*
set ::__ignoreNs($__ns) 1
}
}
foreach __cmd [info commands] {
if {[info exists __localIgnoreCmds($__cmd)] == 0} {
lappend ::__ignoreCmds $__cmd
}
}
}
# we need to track command defined by each package even in
# the -direct case, because they are needed internally by
# the "partial pkgIndex.tcl" step above.
proc __pkgGetAllNamespaces {{root {}}} {
set __list $root
foreach __ns [namespace children $root] {
eval lappend __list [__pkgGetAllNamespaces $__ns]
}
return $__list
}
set ::__ignoreCmds [info commands]
# initialize the list of packages to ignore; these are
# packages that are present before the script/dll is loaded
set ::__ignorePkgs(Tcl) 1
set ::__ignorePkgs(Tk) 1
foreach __pkg [package names] {
set ::__ignorePkgs($__pkg) 1
}
# before marking the original commands, import all the
# namespaces that may have been loaded from the parent;
# these namespaces and their commands are to be ignored
foreach __ns [__pkgGetAllNamespaces] {
set ::__ignoreNs($__ns) 1
namespace import ${__ns}::*
}
set dir "" ;# in case file is pkgIndex.tcl
# Try to load the file if it has the shared library
# extension, otherwise source it. It's important not to
# try to load files that aren't shared libraries, because
# on some systems (like SunOS) the loader will abort the
# whole application when it gets an error.
set __pkgs {}
set __providedPkgs {}
if {[string compare [file extension $__file] \
[info sharedlibextension]] == 0} {
# The "file join ." command below is necessary.
# Without it, if the file name has no \'s and we're
# on UNIX, the load command will invoke the
# LD_LIBRARY_PATH search mechanism, which could cause
# the wrong file to be used.
set __doingWhat loading
load [file join . $__file]
set __type load
} else {
set __doingWhat sourcing
source $__file
set __type source
}
# Using __ variable names to avoid potential namespaces
# clash, even here in post processing because the
# loaded package could have set up traces,...
foreach __ns [__pkgGetAllNamespaces] {
if {[info exists ::__ignoreNs($__ns)] == 0} {
namespace import ${__ns}::*
}
}
foreach __i [info commands] {
set __cmds($__i) 1
}
foreach __i $::__ignoreCmds {
catch {unset __cmds($__i)}
}
foreach __i [array names __cmds] {
# reverse engineer which namespace a command comes from
set __absolute [namespace origin $__i]
# special case so that global names have no leading
# ::, this is required by the unknown command
set __absolute [auto_qualify $__absolute ::]
if {[string compare $__i $__absolute] != 0} {
set __cmds($__absolute) 1
unset __cmds($__i)
}
}
foreach __i $::__providedPkgs {
lappend __pkgs [list $__i [package provide $__i]]
set __ignorePkgs($__i) 1
}
foreach __i [package names] {
if {([string compare [package provide $__i] ""] != 0) \
&& ([info exists ::__ignorePkgs($__i)] == 0)} {
lappend __pkgs [list $__i [package provide $__i]]
}
}
}
} msg] == 1} {
set what [$c eval set __doingWhat]
tclLog "warning: error while $what $file: $msg"
} else {
set type [$c eval set __type]
set cmds [lsort [$c eval array names __cmds]]
set pkgs [$c eval set __pkgs]
if {[llength $pkgs] > 1} {
tclLog "warning: \"$file\" provides more than one package ($pkgs)"
}
foreach pkg $pkgs {
# cmds is empty/not used in the direct case
lappend files($pkg) [list $file $type $cmds]
}
incr processed
unset toProcess($file)
}
interp delete $c
}
if {$processed == 0} {
tclLog "this iteration could not process any files: giving up here"
break
}
}
foreach pkg [lsort [array names files]] {
append index "\npackage ifneeded $pkg "
if {$direct} {
set cmdList {}
foreach elem $files($pkg) {
set file [lindex $elem 0]
set type [lindex $elem 1]
lappend cmdList "\[list $type \[file join \$dir\
[list $file]\]\]"
}
append index [join $cmdList "\\n"]
} else {
append index "\[list tclPkgSetup \$dir [lrange $pkg 0 0]\
[lrange $pkg 1 1] [list $files($pkg)]\]"
}
}
set f [open pkgIndex.tcl w]
puts $f $index
close $f
cd $oldDir
}
# tclPkgSetup --
# This is a utility procedure use by pkgIndex.tcl files. It is invoked
# as part of a "package ifneeded" script. It calls "package provide"
# to indicate that a package is available, then sets entries in the
# auto_index array so that the package's files will be auto-loaded when
# the commands are used.
#
# Arguments:
# dir - Directory containing all the files for this package.
# pkg - Name of the package (no version number).
# version - Version number for the package, such as 2.1.3.
# files - List of files that constitute the package. Each
# element is a sub-list with three elements. The first
# is the name of a file relative to $dir, the second is
# "load" or "source", indicating whether the file is a
# loadable binary or a script to source, and the third
# is a list of commands defined by this file.
proc tclPkgSetup {dir pkg version files} {
global auto_index
package provide $pkg $version
foreach fileInfo $files {
set f [lindex $fileInfo 0]
set type [lindex $fileInfo 1]
foreach cmd [lindex $fileInfo 2] {
if {$type == "load"} {
set auto_index($cmd) [list load [file join $dir $f] $pkg]
} else {
set auto_index($cmd) [list source [file join $dir $f]]
}
}
}
}
# tclMacPkgSearch --
# The procedure is used on the Macintosh to search a given directory for files
# with a TEXT resource named "pkgIndex". If it exists it is sourced in to the
# interpreter to setup the package database.
proc tclMacPkgSearch {dir} {
foreach x [glob -nocomplain [file join $dir *.shlb]] {
if {[file isfile $x]} {
set res [resource open $x]
foreach y [resource list TEXT $res] {
if {$y == "pkgIndex"} {source -rsrc pkgIndex}
}
catch {resource close $res}
}
}
}
# tclPkgUnknown --
# This procedure provides the default for the "package unknown" function.
# It is invoked when a package that's needed can't be found. It scans
# the auto_path directories and their immediate children looking for
# pkgIndex.tcl files and sources any such files that are found to setup
# the package database. (On the Macintosh we also search for pkgIndex
# TEXT resources in all files.)
#
# Arguments:
# name - Name of desired package. Not used.
# version - Version of desired package. Not used.
# exact - Either "-exact" or omitted. Not used.
proc tclPkgUnknown {name version {exact {}}} {
global auto_path tcl_platform env
if {![info exists auto_path]} {
return
}
for {set i [expr {[llength $auto_path] - 1}]} {$i >= 0} {incr i -1} {
# we can't use glob in safe interps, so enclose the following
# in a catch statement
catch {
foreach file [glob -nocomplain [file join [lindex $auto_path $i] \
* pkgIndex.tcl]] {
set dir [file dirname $file]
if {[catch {source $file} msg]} {
tclLog "error reading package index file $file: $msg"
}
}
}
set dir [lindex $auto_path $i]
set file [file join $dir pkgIndex.tcl]
# safe interps usually don't have "file readable", nor stderr channel
if {[interp issafe] || [file readable $file]} {
if {[catch {source $file} msg] && ![interp issafe]} {
tclLog "error reading package index file $file: $msg"
}
}
# On the Macintosh we also look in the resource fork
# of shared libraries
# We can't use tclMacPkgSearch in safe interps because it uses glob
if {(![interp issafe]) && ($tcl_platform(platform) == "macintosh")} {
set dir [lindex $auto_path $i]
tclMacPkgSearch $dir
foreach x [glob -nocomplain [file join $dir *]] {
if {[file isdirectory $x]} {
set dir $x
tclMacPkgSearch $dir
}
}
}
}
}
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