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690 lines
21 KiB
Tcl
690 lines
21 KiB
Tcl
# package.tcl --
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#
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# utility procs formerly in init.tcl which can be loaded on demand
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# for package management.
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#
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# RCS: @(#) $Id: package.tcl,v 1.20 2002/10/22 16:41:28 das Exp $
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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) 1994-1998 Sun Microsystems, Inc.
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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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# Create the package namespace
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namespace eval ::pkg {
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}
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# pkg_compareExtension --
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#
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# Used internally by pkg_mkIndex to compare the extension of a file to
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# a given extension. On Windows, it uses a case-insensitive comparison
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# because the file system can be file insensitive.
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#
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# Arguments:
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# fileName name of a file whose extension is compared
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# ext (optional) The extension to compare against; you must
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# provide the starting dot.
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# Defaults to [info sharedlibextension]
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#
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# Results:
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# Returns 1 if the extension matches, 0 otherwise
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proc pkg_compareExtension { fileName {ext {}} } {
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global tcl_platform
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if {![string length $ext]} {set ext [info sharedlibextension]}
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if {[string equal $tcl_platform(platform) "windows"]} {
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return [string equal -nocase [file extension $fileName] $ext]
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} else {
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# Some unices add trailing numbers after the .so, so
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# we could have something like '.so.1.2'.
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set root $fileName
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while {1} {
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set currExt [file extension $root]
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if {[string equal $currExt $ext]} {
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return 1
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}
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# The current extension does not match; if it is not a numeric
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# value, quit, as we are only looking to ignore version number
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# extensions. Otherwise we might return 1 in this case:
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# pkg_compareExtension foo.so.bar .so
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# which should not match.
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if { ![string is integer -strict [string range $currExt 1 end]] } {
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return 0
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}
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set root [file rootname $root]
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}
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}
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}
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# pkg_mkIndex --
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# This procedure creates a package index in a given directory. The
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# package index consists of a "pkgIndex.tcl" file whose contents are
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# a Tcl script that sets up package information with "package require"
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# commands. The commands describe all of the packages defined by the
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# files given as arguments.
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#
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# Arguments:
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# -direct (optional) If this flag is present, the generated
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# code in pkgMkIndex.tcl will cause the package to be
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# loaded when "package require" is executed, rather
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# than lazily when the first reference to an exported
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# procedure in the package is made.
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# -verbose (optional) Verbose output; the name of each file that
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# was successfully rocessed is printed out. Additionally,
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# if processing of a file failed a message is printed.
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# -load pat (optional) Preload any packages whose names match
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# the pattern. Used to handle DLLs that depend on
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# other packages during their Init procedure.
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# dir - Name of the directory in which to create the index.
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# args - Any number of additional arguments, each giving
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# a glob pattern that matches the names of one or
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# more shared libraries or Tcl script files in
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# dir.
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proc pkg_mkIndex {args} {
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global errorCode errorInfo
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set usage {"pkg_mkIndex ?-direct? ?-lazy? ?-load pattern? ?-verbose? ?--? dir ?pattern ...?"};
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set argCount [llength $args]
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if {$argCount < 1} {
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return -code error "wrong # args: should be\n$usage"
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}
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set more ""
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set direct 1
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set doVerbose 0
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set loadPat ""
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for {set idx 0} {$idx < $argCount} {incr idx} {
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set flag [lindex $args $idx]
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switch -glob -- $flag {
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-- {
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# done with the flags
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incr idx
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break
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}
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-verbose {
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set doVerbose 1
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}
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-lazy {
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set direct 0
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append more " -lazy"
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}
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-direct {
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append more " -direct"
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}
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-load {
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incr idx
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set loadPat [lindex $args $idx]
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append more " -load $loadPat"
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}
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-* {
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return -code error "unknown flag $flag: should be\n$usage"
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}
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default {
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# done with the flags
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break
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}
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}
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}
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set dir [lindex $args $idx]
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set patternList [lrange $args [expr {$idx + 1}] end]
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if {[llength $patternList] == 0} {
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set patternList [list "*.tcl" "*[info sharedlibextension]"]
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}
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set oldDir [pwd]
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cd $dir
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if {[catch {eval glob $patternList} fileList]} {
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global errorCode errorInfo
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cd $oldDir
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return -code error -errorcode $errorCode -errorinfo $errorInfo $fileList
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}
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foreach file $fileList {
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# For each file, figure out what commands and packages it provides.
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# To do this, create a child interpreter, load the file into the
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# interpreter, and get a list of the new commands and packages
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# that are defined.
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if {[string equal $file "pkgIndex.tcl"]} {
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continue
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}
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# Changed back to the original directory before initializing the
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# slave in case TCL_LIBRARY is a relative path (e.g. in the test
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# suite).
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cd $oldDir
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set c [interp create]
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# Load into the child any packages currently loaded in the parent
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# interpreter that match the -load pattern.
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if {[string length $loadPat]} {
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if {$doVerbose} {
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tclLog "currently loaded packages: '[info loaded]'"
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tclLog "trying to load all packages matching $loadPat"
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}
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if {![llength [info loaded]]} {
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tclLog "warning: no packages are currently loaded, nothing"
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tclLog "can possibly match '$loadPat'"
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}
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}
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foreach pkg [info loaded] {
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if {! [string match $loadPat [lindex $pkg 1]]} {
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continue
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}
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if {$doVerbose} {
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tclLog "package [lindex $pkg 1] matches '$loadPat'"
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}
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if {[catch {
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load [lindex $pkg 0] [lindex $pkg 1] $c
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} err]} {
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if {$doVerbose} {
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tclLog "warning: load [lindex $pkg 0] [lindex $pkg 1]\nfailed with: $err"
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}
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} elseif {$doVerbose} {
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tclLog "loaded [lindex $pkg 0] [lindex $pkg 1]"
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}
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if {[string equal [lindex $pkg 1] "Tk"]} {
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# Withdraw . if Tk was loaded, to avoid showing a window.
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$c eval [list wm withdraw .]
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}
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}
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cd $dir
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$c eval {
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# Stub out the package command so packages can
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# require other packages.
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rename package __package_orig
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proc package {what args} {
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switch -- $what {
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require { return ; # ignore transitive requires }
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default { eval __package_orig {$what} $args }
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}
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}
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proc tclPkgUnknown args {}
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package unknown tclPkgUnknown
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# Stub out the unknown command so package can call
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# into each other during their initialilzation.
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proc unknown {args} {}
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# Stub out the auto_import mechanism
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proc auto_import {args} {}
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# reserve the ::tcl namespace for support procs
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# and temporary variables. This might make it awkward
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# to generate a pkgIndex.tcl file for the ::tcl namespace.
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namespace eval ::tcl {
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variable file ;# Current file being processed
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variable direct ;# -direct flag value
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variable x ;# Loop variable
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variable debug ;# For debugging
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variable type ;# "load" or "source", for -direct
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variable namespaces ;# Existing namespaces (e.g., ::tcl)
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variable packages ;# Existing packages (e.g., Tcl)
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variable origCmds ;# Existing commands
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variable newCmds ;# Newly created commands
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variable newPkgs {} ;# Newly created packages
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}
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}
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$c eval [list set ::tcl::file $file]
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$c eval [list set ::tcl::direct $direct]
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# Download needed procedures into the slave because we've
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# just deleted the unknown procedure. This doesn't handle
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# procedures with default arguments.
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foreach p {pkg_compareExtension} {
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$c eval [list proc $p [info args $p] [info body $p]]
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}
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if {[catch {
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$c eval {
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set ::tcl::debug "loading or sourcing"
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# we need to track command defined by each package even in
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# the -direct case, because they are needed internally by
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# the "partial pkgIndex.tcl" step above.
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proc ::tcl::GetAllNamespaces {{root ::}} {
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set list $root
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foreach ns [namespace children $root] {
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eval lappend list [::tcl::GetAllNamespaces $ns]
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}
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return $list
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}
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# init the list of existing namespaces, packages, commands
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foreach ::tcl::x [::tcl::GetAllNamespaces] {
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set ::tcl::namespaces($::tcl::x) 1
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}
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foreach ::tcl::x [package names] {
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set ::tcl::packages($::tcl::x) 1
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}
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set ::tcl::origCmds [info commands]
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# Try to load the file if it has the shared library
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# extension, otherwise source it. It's important not to
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# try to load files that aren't shared libraries, because
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# on some systems (like SunOS) the loader will abort the
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# whole application when it gets an error.
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if {[pkg_compareExtension $::tcl::file [info sharedlibextension]]} {
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# The "file join ." command below is necessary.
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# Without it, if the file name has no \'s and we're
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# on UNIX, the load command will invoke the
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# LD_LIBRARY_PATH search mechanism, which could cause
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# the wrong file to be used.
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set ::tcl::debug loading
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load [file join . $::tcl::file]
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set ::tcl::type load
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} else {
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set ::tcl::debug sourcing
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source $::tcl::file
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set ::tcl::type source
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}
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# As a performance optimization, if we are creating
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# direct load packages, don't bother figuring out the
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# set of commands created by the new packages. We
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# only need that list for setting up the autoloading
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# used in the non-direct case.
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if { !$::tcl::direct } {
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# See what new namespaces appeared, and import commands
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# from them. Only exported commands go into the index.
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foreach ::tcl::x [::tcl::GetAllNamespaces] {
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if {! [info exists ::tcl::namespaces($::tcl::x)]} {
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namespace import -force ${::tcl::x}::*
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}
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# Figure out what commands appeared
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foreach ::tcl::x [info commands] {
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set ::tcl::newCmds($::tcl::x) 1
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}
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foreach ::tcl::x $::tcl::origCmds {
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catch {unset ::tcl::newCmds($::tcl::x)}
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}
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foreach ::tcl::x [array names ::tcl::newCmds] {
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# determine which namespace a command comes from
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set ::tcl::abs [namespace origin $::tcl::x]
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# special case so that global names have no leading
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# ::, this is required by the unknown command
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set ::tcl::abs \
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[lindex [auto_qualify $::tcl::abs ::] 0]
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if {[string compare $::tcl::x $::tcl::abs]} {
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# Name changed during qualification
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set ::tcl::newCmds($::tcl::abs) 1
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unset ::tcl::newCmds($::tcl::x)
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}
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}
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}
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}
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# Look through the packages that appeared, and if there is
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# a version provided, then record it
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foreach ::tcl::x [package names] {
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if {[string compare [package provide $::tcl::x] ""] \
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&& ![info exists ::tcl::packages($::tcl::x)]} {
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lappend ::tcl::newPkgs \
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[list $::tcl::x [package provide $::tcl::x]]
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}
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}
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}
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} msg] == 1} {
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set what [$c eval set ::tcl::debug]
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if {$doVerbose} {
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tclLog "warning: error while $what $file: $msg"
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}
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} else {
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set what [$c eval set ::tcl::debug]
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if {$doVerbose} {
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tclLog "successful $what of $file"
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}
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set type [$c eval set ::tcl::type]
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set cmds [lsort [$c eval array names ::tcl::newCmds]]
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set pkgs [$c eval set ::tcl::newPkgs]
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if {$doVerbose} {
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tclLog "commands provided were $cmds"
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tclLog "packages provided were $pkgs"
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}
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if {[llength $pkgs] > 1} {
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tclLog "warning: \"$file\" provides more than one package ($pkgs)"
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}
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foreach pkg $pkgs {
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# cmds is empty/not used in the direct case
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lappend files($pkg) [list $file $type $cmds]
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}
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if {$doVerbose} {
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tclLog "processed $file"
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}
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}
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interp delete $c
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}
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append index "# Tcl package index file, version 1.1\n"
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append index "# This file is generated by the \"pkg_mkIndex$more\" command\n"
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append index "# and sourced either when an application starts up or\n"
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append index "# by a \"package unknown\" script. It invokes the\n"
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append index "# \"package ifneeded\" command to set up package-related\n"
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append index "# information so that packages will be loaded automatically\n"
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append index "# in response to \"package require\" commands. When this\n"
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append index "# script is sourced, the variable \$dir must contain the\n"
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append index "# full path name of this file's directory.\n"
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foreach pkg [lsort [array names files]] {
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set cmd {}
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foreach {name version} $pkg {
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break
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}
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lappend cmd ::pkg::create -name $name -version $version
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foreach spec $files($pkg) {
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foreach {file type procs} $spec {
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if { $direct } {
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set procs {}
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}
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lappend cmd "-$type" [list $file $procs]
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}
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}
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append index "\n[eval $cmd]"
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}
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set f [open pkgIndex.tcl w]
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puts $f $index
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close $f
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cd $oldDir
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}
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# tclPkgSetup --
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# This is a utility procedure use by pkgIndex.tcl files. It is invoked
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# as part of a "package ifneeded" script. It calls "package provide"
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# to indicate that a package is available, then sets entries in the
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# auto_index array so that the package's files will be auto-loaded when
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# the commands are used.
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#
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# Arguments:
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# dir - Directory containing all the files for this package.
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# pkg - Name of the package (no version number).
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# version - Version number for the package, such as 2.1.3.
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# files - List of files that constitute the package. Each
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# element is a sub-list with three elements. The first
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# is the name of a file relative to $dir, the second is
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# "load" or "source", indicating whether the file is a
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# loadable binary or a script to source, and the third
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# is a list of commands defined by this file.
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proc tclPkgSetup {dir pkg version files} {
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global auto_index
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package provide $pkg $version
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foreach fileInfo $files {
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set f [lindex $fileInfo 0]
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set type [lindex $fileInfo 1]
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foreach cmd [lindex $fileInfo 2] {
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if {[string equal $type "load"]} {
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set auto_index($cmd) [list load [file join $dir $f] $pkg]
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} else {
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set auto_index($cmd) [list source [file join $dir $f]]
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}
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}
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}
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}
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# tclMacPkgSearch --
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# The procedure is used on the Macintosh to search a given directory for files
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# with a TEXT resource named "pkgIndex". If it exists it is sourced in to the
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# interpreter to setup the package database.
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proc tclMacPkgSearch {dir} {
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foreach x [glob -directory $dir -nocomplain *.shlb] {
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if {[file isfile $x]} {
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set res [resource open $x]
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foreach y [resource list TEXT $res] {
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if {[string equal $y "pkgIndex"]} {source -rsrc pkgIndex}
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}
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catch {resource close $res}
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}
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}
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}
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# tclPkgUnknown --
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# This procedure provides the default for the "package unknown" function.
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# It is invoked when a package that's needed can't be found. It scans
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# the auto_path directories and their immediate children looking for
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# pkgIndex.tcl files and sources any such files that are found to setup
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# the package database. (On the Macintosh we also search for pkgIndex
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# TEXT resources in all files.) As it searches, it will recognize changes
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# to the auto_path and scan any new directories.
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#
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# Arguments:
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# name - Name of desired package. Not used.
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# version - Version of desired package. Not used.
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# exact - Either "-exact" or omitted. Not used.
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proc tclPkgUnknown {name version {exact {}}} {
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global auto_path tcl_platform env
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if {![info exists auto_path]} {
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return
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}
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# Cache the auto_path, because it may change while we run through
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# the first set of pkgIndex.tcl files
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set old_path [set use_path $auto_path]
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while {[llength $use_path]} {
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set dir [lindex $use_path end]
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# we can't use glob in safe interps, so enclose the following
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# in a catch statement, where we get the pkgIndex files out
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# of the subdirectories
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catch {
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foreach file [glob -directory $dir -join -nocomplain \
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* pkgIndex.tcl] {
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set dir [file dirname $file]
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if {[file readable $file] && ![info exists procdDirs($dir)]} {
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if {[catch {source $file} msg]} {
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tclLog "error reading package index file $file: $msg"
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} else {
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set procdDirs($dir) 1
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}
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}
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}
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}
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# On MacOSX also search the Resources/Scripts directories in
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# the subdirectories for pkgIndex files
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if {[string equal $::tcl_platform(platform) "unix"] && \
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|
[string equal $::tcl_platform(os) "Darwin"]} {
|
|
set dir [lindex $use_path end]
|
|
catch {
|
|
foreach file [glob -directory $dir -join -nocomplain \
|
|
* Resources Scripts pkgIndex.tcl] {
|
|
set dir [file dirname $file]
|
|
if {[file readable $file] && ![info exists procdDirs($dir)]} {
|
|
if {[catch {source $file} msg]} {
|
|
tclLog "error reading package index file $file: $msg"
|
|
} else {
|
|
set procdDirs($dir) 1
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
set dir [lindex $use_path end]
|
|
set file [file join $dir pkgIndex.tcl]
|
|
# safe interps usually don't have "file readable", nor stderr channel
|
|
if {([interp issafe] || [file readable $file]) && \
|
|
![info exists procdDirs($dir)]} {
|
|
if {[catch {source $file} msg] && ![interp issafe]} {
|
|
tclLog "error reading package index file $file: $msg"
|
|
} else {
|
|
set procdDirs($dir) 1
|
|
}
|
|
}
|
|
# 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]) && \
|
|
[string equal $tcl_platform(platform) "macintosh"]} {
|
|
set dir [lindex $use_path end]
|
|
if {![info exists procdDirs($dir)]} {
|
|
tclMacPkgSearch $dir
|
|
set procdDirs($dir) 1
|
|
}
|
|
foreach x [glob -directory $dir -nocomplain *] {
|
|
if {[file isdirectory $x] && ![info exists procdDirs($x)]} {
|
|
set dir $x
|
|
tclMacPkgSearch $dir
|
|
set procdDirs($dir) 1
|
|
}
|
|
}
|
|
}
|
|
set use_path [lrange $use_path 0 end-1]
|
|
if {[string compare $old_path $auto_path]} {
|
|
foreach dir $auto_path {
|
|
lappend use_path $dir
|
|
}
|
|
set old_path $auto_path
|
|
}
|
|
}
|
|
}
|
|
|
|
# ::pkg::create --
|
|
#
|
|
# Given a package specification generate a "package ifneeded" statement
|
|
# for the package, suitable for inclusion in a pkgIndex.tcl file.
|
|
#
|
|
# Arguments:
|
|
# args arguments used by the create function:
|
|
# -name packageName
|
|
# -version packageVersion
|
|
# -load {filename ?{procs}?}
|
|
# ...
|
|
# -source {filename ?{procs}?}
|
|
# ...
|
|
#
|
|
# Any number of -load and -source parameters may be
|
|
# specified, so long as there is at least one -load or
|
|
# -source parameter. If the procs component of a
|
|
# module specifier is left off, that module will be
|
|
# set up for direct loading; otherwise, it will be
|
|
# set up for lazy loading. If both -source and -load
|
|
# are specified, the -load'ed files will be loaded
|
|
# first, followed by the -source'd files.
|
|
#
|
|
# Results:
|
|
# An appropriate "package ifneeded" statement for the package.
|
|
|
|
proc ::pkg::create {args} {
|
|
append err(usage) "[lindex [info level 0] 0] "
|
|
append err(usage) "-name packageName -version packageVersion"
|
|
append err(usage) "?-load {filename ?{procs}?}? ... "
|
|
append err(usage) "?-source {filename ?{procs}?}? ..."
|
|
|
|
set err(wrongNumArgs) "wrong # args: should be \"$err(usage)\""
|
|
set err(valueMissing) "value for \"%s\" missing: should be \"$err(usage)\""
|
|
set err(unknownOpt) "unknown option \"%s\": should be \"$err(usage)\""
|
|
set err(noLoadOrSource) "at least one of -load and -source must be given"
|
|
|
|
# process arguments
|
|
set len [llength $args]
|
|
if { $len < 6 } {
|
|
error $err(wrongNumArgs)
|
|
}
|
|
|
|
# Initialize parameters
|
|
set opts(-name) {}
|
|
set opts(-version) {}
|
|
set opts(-source) {}
|
|
set opts(-load) {}
|
|
|
|
# process parameters
|
|
for {set i 0} {$i < $len} {incr i} {
|
|
set flag [lindex $args $i]
|
|
incr i
|
|
switch -glob -- $flag {
|
|
"-name" -
|
|
"-version" {
|
|
if { $i >= $len } {
|
|
error [format $err(valueMissing) $flag]
|
|
}
|
|
set opts($flag) [lindex $args $i]
|
|
}
|
|
"-source" -
|
|
"-load" {
|
|
if { $i >= $len } {
|
|
error [format $err(valueMissing) $flag]
|
|
}
|
|
lappend opts($flag) [lindex $args $i]
|
|
}
|
|
default {
|
|
error [format $err(unknownOpt) [lindex $args $i]]
|
|
}
|
|
}
|
|
}
|
|
|
|
# Validate the parameters
|
|
if { [llength $opts(-name)] == 0 } {
|
|
error [format $err(valueMissing) "-name"]
|
|
}
|
|
if { [llength $opts(-version)] == 0 } {
|
|
error [format $err(valueMissing) "-version"]
|
|
}
|
|
|
|
if { [llength $opts(-source)] == 0 && [llength $opts(-load)] == 0 } {
|
|
error $err(noLoadOrSource)
|
|
}
|
|
|
|
# OK, now everything is good. Generate the package ifneeded statment.
|
|
set cmdline "package ifneeded $opts(-name) $opts(-version) "
|
|
|
|
set cmdList {}
|
|
set lazyFileList {}
|
|
|
|
# Handle -load and -source specs
|
|
foreach key {load source} {
|
|
foreach filespec $opts(-$key) {
|
|
foreach {filename proclist} {{} {}} {
|
|
break
|
|
}
|
|
foreach {filename proclist} $filespec {
|
|
break
|
|
}
|
|
|
|
if { [llength $proclist] == 0 } {
|
|
set cmd "\[list $key \[file join \$dir [list $filename]\]\]"
|
|
lappend cmdList $cmd
|
|
} else {
|
|
lappend lazyFileList [list $filename $key $proclist]
|
|
}
|
|
}
|
|
}
|
|
|
|
if { [llength $lazyFileList] > 0 } {
|
|
lappend cmdList "\[list tclPkgSetup \$dir $opts(-name)\
|
|
$opts(-version) [list $lazyFileList]\]"
|
|
}
|
|
append cmdline [join $cmdList "\\n"]
|
|
return $cmdline
|
|
}
|
|
|