diff options
Diffstat (limited to 'library/init.tcl')
| -rw-r--r-- | library/init.tcl | 475 |
1 files changed, 156 insertions, 319 deletions
diff --git a/library/init.tcl b/library/init.tcl index 1dba84d..ce40d8d 100644 --- a/library/init.tcl +++ b/library/init.tcl @@ -3,7 +3,7 @@ # Default system startup file for Tcl-based applications. Defines # "unknown" procedure and auto-load facilities. # -# RCS: @(#) $Id: init.tcl,v 1.17 1998/10/23 22:22:15 welch Exp $ +# RCS: @(#) $Id: init.tcl,v 1.18 1998/10/30 23:02:02 welch Exp $ # # Copyright (c) 1991-1993 The Regents of the University of California. # Copyright (c) 1994-1996 Sun Microsystems, Inc. @@ -578,7 +578,8 @@ 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 tcl_findLibrary + && ([lsearch -exact {unknown pkg_mkIndex tclPkgSetup + tcl_findLibrary pkg_compareExtension tclMacPkgSearch tclPkgUnknown} $p] < 0)} { rename $p {} } @@ -1081,23 +1082,16 @@ if {$::tcl_platform(platform) == "windows"} { if {[string compare $ext {}] == 0} { set ext [info sharedlibextension] } - set cmp [string compare \ - [string tolower [file extension $fileName]] \ - [string tolower $ext]] - if {$cmp} { - return 0 - } - return 1 + return [expr {[string compare \ + [string tolower [file extension $fileName]] \ + [string tolower $ext]] == 0}] } } else { proc pkg_compareExtension { fileName {ext {}} } { if {[string compare $ext {}] == 0} { set ext [info sharedlibextension] } - if {[string compare [file extension $fileName] $ext]} { - return 0 - } - return 1 + return [expr {[string compare [file extension $fileName] $ext] == 0}] } } @@ -1114,19 +1108,9 @@ if {$::tcl_platform(platform) == "windows"} { # 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). # -verbose (optional) Verbose output; the name of each file that # was successfully rocessed is printed out. Additionally, -# if processing of a file failed a message is printed -# out; a file failure may not indicate that the indexing -# has failed, since pkg_mkIndex stores the list of failed -# files and tries again. The second time the processing -# may succeed, for example if a required package has been -# indexed by a previous pass. +# if processing of a file failed a message is printed. # 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 @@ -1135,7 +1119,7 @@ if {$::tcl_platform(platform) == "windows"} { proc pkg_mkIndex {args} { global errorCode errorInfo - set usage {"pkg_mkIndex ?-nopkgrequire? ?-direct? ?-verbose? dir ?pattern ...?"}; + set usage {"pkg_mkIndex ?-direct? ?-verbose? dir ?pattern ...?"}; set argCount [llength $args] if {$argCount < 1} { @@ -1144,7 +1128,6 @@ proc pkg_mkIndex {args} { set more "" set direct 0 - set noPkgRequire 0 set doVerbose 0 for {set idx 0} {$idx < $argCount} {incr idx} { set flag [lindex $args $idx] @@ -1154,25 +1137,16 @@ proc pkg_mkIndex {args} { incr idx break } - -verbose { set doVerbose 1 } - -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 @@ -1198,329 +1172,192 @@ proc pkg_mkIndex {args} { 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. - - if {[catch { - foreach file [eval glob $patternList] { - set toProcess($file) 1 - } - } err]} { - set ei $::errorInfo - set ec $::errorCode + if {[catch {eval glob $patternList} fileList]} { + global errorCode errorInfo cd $oldDir - error $err $ei $ec + return -code error -errorcode $errorCode -errorinfo $errorInfo $fileList } + foreach file $fileList { + # 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. - 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. + if {[string compare $file "pkgIndex.tcl"] == 0} { + continue + } - set c [interp create] + 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. + # 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 + 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. - # Note that the $dir value is hardwired to ".", because we are - # in the directory with the .tcl files. - - foreach pkg [array names files] { - $c eval "package ifneeded $pkg\ - \[list tclPkgSetup . \ - [lrange $pkg 0 0] [lrange $pkg 1 1]\ - [list $files($pkg)]\]" - } - 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 that this cannot detect - # 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 { + # Stub out the package command so packages can + # require other packages. + + rename package __package_orig + proc package {what args} { + switch -- $what { + require { return ; # ignore transitive requires } + default { eval __package_orig {$what} $args } } } + proc tclPkgUnknown args {} + package unknown tclPkgUnknown - # make sure that the auto_path in the slave is consistent - # with ours - $c eval [list set auto_path $::auto_path] - - $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($__ns) 1 + # Stub out the unknown command so package can call + # into each other during their initialilzation. - # if the namespace is already in the __ignoreNs - # array, its commands have already been imported + proc unknown {args} {} - if {[info exists ::__ignoreNs($__ns)] == 0} { - namespace import ${__ns}::* - } - } - foreach __cmd [info commands] { - set __localIgnoreCmds($__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 $__f] - } - } + # Stub out the auto_import mechanism - # packages and commands that were defined by these - # files are to be ignored. + proc auto_import {args} {} - foreach __p [package names] { - if {[info exists __localIgnorePkgs($__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 - } - } - } + # reserve the ::tcl namespace for support procs + # and temporary variables. This might make it awkward + # to generate a pkgIndex.tcl file for the ::tcl namespace. - # 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. + namespace eval ::tcl { + variable file ;# Current file being processed + variable direct ;# -direct flag value + variable x ;# Loop variable + variable debug ;# For debugging + variable type ;# "load" or "source", for -direct + variable namespaces ;# Existing namespaces (e.g., ::tcl) + variable packages ;# Existing packages (e.g., Tcl) + variable origCmds ;# Existing commands + variable newCmds ;# Newly created commands + variable newPkgs {} ;# Newly created packages + } + } - proc __pkgGetAllNamespaces {{root {}}} { - set __list $root - foreach __ns [namespace children $root] { - eval lappend __list [__pkgGetAllNamespaces $__ns] - } - return $__list - } + $c eval [list set ::tcl::file $file] + $c eval [list set ::tcl::direct $direct] + if {[catch { + $c eval { + set ::tcl::debug "loading or sourcing" - # initialize the list of packages to ignore; these are - # packages that are present before the script/dll is loaded + # we need to track command defined by each package even in + # the -direct case, because they are needed internally by + # the "partial pkgIndex.tcl" step above. - set ::__ignorePkgs(Tcl) 1 - set ::__ignorePkgs(Tk) 1 - foreach __pkg [package names] { - set ::__ignorePkgs($__pkg) 1 + proc ::tcl::GetAllNamespaces {{root ::}} { + set list $root + foreach ns [namespace children $root] { + eval lappend list [::tcl::GetAllNamespaces $ns] } + return $list + } - # before marking the original commands, import all the - # namespaces that may have been loaded from the parent; - # these namespaces and their commands are to be ignored + # initialize the list of existing namespaces, packages, commands - foreach __ns [__pkgGetAllNamespaces] { - set ::__ignoreNs($__ns) 1 - namespace import ${__ns}::* - } - - set ::__ignoreCmds [info commands] - - 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 {[pkg_compareExtension $__file [info sharedlibextension]]} { - # 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 $__file - set __type source - } + foreach ::tcl::x [::tcl::GetAllNamespaces] { + set ::tcl::namespaces($::tcl::x) 1 + } + foreach ::tcl::x [package names] { + set ::tcl::packages($::tcl::x) 1 + } + set ::tcl::origCmds [info commands] + + # 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. + + if {[pkg_compareExtension $::tcl::file [info sharedlibextension]]} { + # 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 ::tcl::debug loading + load [file join . $::tcl::file] + set ::tcl::type load + } else { + set ::tcl::debug sourcing + source $::tcl::file + set ::tcl::type source + } - # Using __ variable names to avoid potential namespaces - # clash, even here in post processing because the - # loaded package could have set up traces,... + # See what new namespaces appeared, and import commands + # from them. Only exported commands go into the index. - foreach __ns [__pkgGetAllNamespaces] { - if {[info exists ::__ignoreNs($__ns)] == 0} { - namespace import ${__ns}::* - } - } - foreach __i [info commands] { - set __cmds($__i) 1 + foreach ::tcl::x [::tcl::GetAllNamespaces] { + if {! [info exists ::tcl::namespaces($::tcl::x)]} { + namespace import ${::tcl::x}::* } - 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 + # Figure out what commands appeared - set __absolute [auto_qualify $__absolute ::] + foreach ::tcl::x [info commands] { + set ::tcl::newCmds($::tcl::x) 1 + } + foreach ::tcl::x $::tcl::origCmds { + catch {unset ::tcl::newCmds($::tcl::x)} + } + foreach ::tcl::x [array names ::tcl::newCmds] { + # reverse engineer which namespace a command comes from + + set ::tcl::abs [namespace origin $::tcl::x] - if {[string compare $__i $__absolute] != 0} { - set __cmds($__absolute) 1 - unset __cmds($__i) - } + # special case so that global names have no leading + # ::, this is required by the unknown command - # final check, to support packages spread over - # multiple files: if the new command is in the - # namespace of an ignored package, de-ignore it. + set ::tcl::abs [auto_qualify $::tcl::abs ::] - regsub {^::} [namespace qualifiers $__absolute] {} __qual - if {[info exists ::__ignorePkgs($__qual)]} { - unset ::__ignorePkgs($__qual) - } - } + if {[string compare $::tcl::x $::tcl::abs] != 0} { + # Name changed during qualification - 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 $__i]] - } + set ::tcl::newCmds($::tcl::abs) 1 + unset ::tcl::newCmds($::tcl::x) } } - } msg] == 1} { - set what [$c eval set __doingWhat] - if {$doVerbose} { - tclLog "warning: error while $what $file: $msg\nthis file will be retried in the next pass" - } - } else { - set type [$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) + # Look through the packages that appeared, and if there is + # a version provided, then record it - if {$doVerbose} { - tclLog "processed $file" + foreach ::tcl::x [package names] { + if {([string compare [package provide $::tcl::x] ""] != 0) \ + && ![info exists ::tcl::packages($::tcl::x)]} { + lappend ::tcl::newPkgs \ + [list $::tcl::x [package provide $::tcl::x]] + } } } - interp delete $c - } + } msg] == 1} { + set what [$c eval set ::tcl::debug] + if {$doVerbose} { + tclLog "warning: error while $what $file: $msg" + } + } else { + set type [$c eval set ::tcl::type] + set cmds [lsort [$c eval array names ::tcl::newCmds]] + set pkgs [$c eval set ::tcl::newPkgs] + 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 $cmds] + } - if {$processed == 0} { - tclLog "this iteration could not process any files: giving up here" - break + if {$doVerbose} { + tclLog "processed $file" + } } + interp delete $c } foreach pkg [lsort [array names files]] { |