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auto.tcl
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# auto.tcl -- # # utility procs formerly in init.tcl dealing with auto execution # of commands and can be auto loaded themselves. # # Copyright (c) 1991-1993 The Regents of the University of California. # Copyright (c) 1994-1998 Sun Microsystems, Inc. # # See the file "license.terms" for information on usage and redistribution # of this file, and for a DISCLAIMER OF ALL WARRANTIES. # # 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 commands that are listed in the auto-load index. # # Arguments: # None. proc auto_reset {} { if {[array exists ::auto_index]} { foreach cmdName [array names ::auto_index] { set fqcn [namespace which $cmdName] if {$fqcn eq ""} {continue} rename $fqcn {} } } unset -nocomplain ::auto_execs ::auto_index ::tcl::auto_oldpath if {[catch {llength $::auto_path}]} { set ::auto_path [list [info library]] } else { if {[info library] ni $::auto_path} { lappend ::auto_path [info library] } } } # tcl_findLibrary -- # # This is a utility for extensions that searches for a library directory # using a canonical searching algorithm. A side effect is to source # the initialization script and set a global library variable. # # Arguments: # basename Prefix of the directory name, (e.g., "tk") # version Version number of the package, (e.g., "8.0") # patch Patchlevel of the package, (e.g., "8.0.3") # initScript Initialization script to source (e.g., tk.tcl) # enVarName environment variable to honor (e.g., TK_LIBRARY) # varName Global variable to set when done (e.g., tk_library) proc tcl_findLibrary {basename version patch initScript enVarName varName} { upvar #0 $varName the_library global env set dirs {} set errors {} # The C application may have hardwired a path, which we honor if {[info exists the_library] && $the_library ne ""} { lappend dirs $the_library } else { # Do the canonical search # 1. From an environment variable, if it exists. # Placing this first gives the end-user ultimate control # to work-around any bugs, or to customize. if {[info exists env($enVarName)]} { lappend dirs $env($enVarName) } # 2. In the package script directory registered within # the configuration of the package itself. if {[catch { ::${basename}::pkgconfig get scriptdir,runtime } value] == 0} { lappend dirs $value } # 2a. As a sibling of Tcl's script directory if {[catch { ::tcl::pkgconfig get scriptdir,runtime } value] == 0} { lappend dirs [file join [file dirname $value] $basename$version] } # 3. Relative to auto_path directories. This checks relative to the # Tcl library as well as allowing loading of libraries added to the # auto_path that is not relative to the core library or binary paths. foreach d $::auto_path { lappend dirs [file join $d $basename$version] if {$::tcl_platform(platform) eq "unix" && $::tcl_platform(os) eq "Darwin"} { # 4. On MacOSX, check the Resources/Scripts subdir too lappend dirs [file join $d $basename$version Resources Scripts] } } # 3. Various locations relative to the executable # ../lib/foo1.0 (From bin directory in install hierarchy) # ../../lib/foo1.0 (From bin/arch directory in install hierarchy) # ../library (From unix directory in build hierarchy) # # Remaining locations are out of date (when relevant, they ought # to be covered by the $::auto_path seach above) and disabled. # # ../../library (From unix/arch directory in build hierarchy) # ../../foo1.0.1/library # (From unix directory in parallel build hierarchy) # ../../../foo1.0.1/library # (From unix/arch directory in parallel build hierarchy) set parentDir [file dirname [file dirname [info nameofexecutable]]] set grandParentDir [file dirname $parentDir] lappend dirs [file join $parentDir lib $basename$version] lappend dirs [file join $grandParentDir lib $basename$version] lappend dirs [file join $parentDir library] if {0} { lappend dirs [file join $grandParentDir library] lappend dirs [file join $grandParentDir $basename$patch library] lappend dirs [file join [file dirname $grandParentDir] \ $basename$patch library] } } # uniquify $dirs in order array set seen {} foreach i $dirs { # Take note that the [file normalize] below has been noted to # cause difficulties for the freewrap utility. See Bug 1072136. # Until freewrap resolves the matter, one might work around the # problem by disabling that branch. if {[interp issafe]} { set norm $i } else { set norm [file normalize $i] } if {[info exists seen($norm)]} { continue } set seen($norm) "" lappend uniqdirs $i } set dirs $uniqdirs foreach i $dirs { set the_library $i set file [file join $i $initScript] # source everything when in a safe interpreter because # we have a source command, but no file exists command if {[interp issafe] || [file exists $file]} { if {![catch {uplevel #0 [list source $file]} msg opts]} { return } else { append errors "$file: $msg\n" append errors [dict get $opts -errorinfo]\n } } } unset -nocomplain the_library set msg "Can't find a usable $initScript in the following directories: \n" append msg " $dirs\n\n" append msg "$errors\n\n" append msg "This probably means that $basename wasn't installed properly.\n" error $msg } # ---------------------------------------------------------------------- # auto_mkindex # ---------------------------------------------------------------------- # The following procedures are used to generate the tclIndex file # from Tcl source files. They use a special safe interpreter to # parse Tcl source files, writing out index entries as "proc" # commands are encountered. This implementation won't work in a # safe interpreter, since a safe interpreter can't create the # special parser and mess with its commands. if {[interp issafe]} { return ;# Stop sourcing the file here } # 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. # # 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} { if {[interp issafe]} { error "can't generate index within safe interpreter" } 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 {[llength $args] == 0} { set args *.tcl } auto_mkindex_parser::init foreach file [glob -- {*}$args] { if {[catch {auto_mkindex_parser::mkindex $file} msg opts] == 0} { append index $msg } else { cd $oldDir return -options $opts $msg } } auto_mkindex_parser::cleanup set fid [open "tclIndex" w] puts -nonewline $fid $index close $fid cd $oldDir } # Original version of auto_mkindex that just searches the source # code for "proc" at the beginning of the line. proc auto_mkindex_old {dir args} { 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 {[llength $args] == 0} { set args *.tcl } foreach file [glob -- {*}$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 $f } msg opts] if {$error} { catch {close $f} cd $oldDir return -options $opts $msg } } set f "" set error [catch { set f [open tclIndex w] puts -nonewline $f $index close $f cd $oldDir } msg opts] if {$error} { catch {close $f} cd $oldDir error $msg $info $code return -options $opts $msg } } # Create a safe interpreter that can be used to parse Tcl source files # generate a tclIndex file for autoloading. This interp contains # commands for things that need index entries. Each time a command # is executed, it writes an entry out to the index file. namespace eval auto_mkindex_parser { variable parser "" ;# parser used to build index variable index "" ;# maintains index as it is built variable scriptFile "" ;# name of file being processed variable contextStack "" ;# stack of namespace scopes variable imports "" ;# keeps track of all imported cmds variable initCommands ;# list of commands that create aliases if {![info exists initCommands]} { set initCommands [list] } proc init {} { variable parser variable initCommands if {![interp issafe]} { set parser [interp create -safe] $parser hide info $parser hide rename $parser hide proc $parser hide namespace $parser hide eval $parser hide puts $parser invokehidden namespace delete :: $parser invokehidden proc unknown {args} {} # We'll need access to the "namespace" command within the # interp. Put it back, but move it out of the way. $parser expose namespace $parser invokehidden rename namespace _%@namespace $parser expose eval $parser invokehidden rename eval _%@eval # Install all the registered psuedo-command implementations foreach cmd $initCommands { eval $cmd } } } proc cleanup {} { variable parser interp delete $parser unset parser } } # auto_mkindex_parser::mkindex -- # # Used by the "auto_mkindex" command to create a "tclIndex" file for # the given Tcl source file. Executes the commands in the file, and # handles things like the "proc" command by adding an entry for the # index file. Returns a string that represents the index file. # # Arguments: # file Name of Tcl source file to be indexed. proc auto_mkindex_parser::mkindex {file} { variable parser variable index variable scriptFile variable contextStack variable imports set scriptFile $file set fid [open $file] set contents [read $fid] close $fid # There is one problem with sourcing files into the safe # interpreter: references like "$x" will fail since code is not # really being executed and variables do not really exist. # To avoid this, we replace all $ with \0 (literally, the null char) # later, when getting proc names we will have to reverse this replacement, # in case there were any $ in the proc name. This will cause a problem # if somebody actually tries to have a \0 in their proc name. Too bad # for them. set contents [string map [list \$ \0] $contents] set index "" set contextStack "" set imports "" $parser eval $contents foreach name $imports { catch {$parser eval [list _%@namespace forget $name]} } return $index } # auto_mkindex_parser::hook command # # Registers a Tcl command to evaluate when initializing the # slave interpreter used by the mkindex parser. # The command is evaluated in the master interpreter, and can # use the variable auto_mkindex_parser::parser to get to the slave proc auto_mkindex_parser::hook {cmd} { variable initCommands lappend initCommands $cmd } # auto_mkindex_parser::slavehook command # # Registers a Tcl command to evaluate when initializing the # slave interpreter used by the mkindex parser. # The command is evaluated in the slave interpreter. proc auto_mkindex_parser::slavehook {cmd} { variable initCommands # The $parser variable is defined to be the name of the # slave interpreter when this command is used later. lappend initCommands "\$parser eval [list $cmd]" } # auto_mkindex_parser::command -- # # Registers a new command with the "auto_mkindex_parser" interpreter # that parses Tcl files. These commands are fake versions of things # like the "proc" command. When you execute them, they simply write # out an entry to a "tclIndex" file for auto-loading. # # This procedure allows extensions to register their own commands # with the auto_mkindex facility. For example, a package like # [incr Tcl] might register a "class" command so that class definitions # could be added to a "tclIndex" file for auto-loading. # # Arguments: # name Name of command recognized in Tcl files. # arglist Argument list for command. # body Implementation of command to handle indexing. proc auto_mkindex_parser::command {name arglist body} { hook [list auto_mkindex_parser::commandInit $name $arglist $body] } # auto_mkindex_parser::commandInit -- # # This does the actual work set up by auto_mkindex_parser::command # This is called when the interpreter used by the parser is created. # # Arguments: # name Name of command recognized in Tcl files. # arglist Argument list for command. # body Implementation of command to handle indexing. proc auto_mkindex_parser::commandInit {name arglist body} { variable parser set ns [namespace qualifiers $name] set tail [namespace tail $name] if {$ns eq ""} { set fakeName [namespace current]::_%@fake_$tail } else { set fakeName [namespace current]::[string map {:: _} _%@fake_$name] } proc $fakeName $arglist $body # YUK! Tcl won't let us alias fully qualified command names, # so we can't handle names like "::itcl::class". Instead, # we have to build procs with the fully qualified names, and # have the procs point to the aliases. if {[string match *::* $name]} { set exportCmd [list _%@namespace export [namespace tail $name]] $parser eval [list _%@namespace eval $ns $exportCmd] # The following proc definition does not work if you # want to tolerate space or something else diabolical # in the procedure name, (i.e., space in $alias) # The following does not work: # "_%@eval {$alias} \$args" # because $alias gets concat'ed to $args. # The following does not work because $cmd is somehow undefined # "set cmd {$alias} \; _%@eval {\$cmd} \$args" # A gold star to someone that can make test # autoMkindex-3.3 work properly set alias [namespace tail $fakeName] $parser invokehidden proc $name {args} "_%@eval {$alias} \$args" $parser alias $alias $fakeName } else { $parser alias $name $fakeName } return } # auto_mkindex_parser::fullname -- # Used by commands like "proc" within the auto_mkindex parser. # Returns the qualified namespace name for the "name" argument. # If the "name" does not start with "::", elements are added from # the current namespace stack to produce a qualified name. Then, # the name is examined to see whether or not it should really be # qualified. If the name has more than the leading "::", it is # returned as a fully qualified name. Otherwise, it is returned # as a simple name. That way, the Tcl autoloader will recognize # it properly. # # Arguments: # name - Name that is being added to index. proc auto_mkindex_parser::fullname {name} { variable contextStack if {![string match ::* $name]} { foreach ns $contextStack { set name "${ns}::$name" if {[string match ::* $name]} { break } } } if {[namespace qualifiers $name] eq ""} { set name [namespace tail $name] } elseif {![string match ::* $name]} { set name "::$name" } # Earlier, mkindex replaced all $'s with \0. Now, we have to reverse # that replacement. return [string map [list \0 \$] $name] } if {[llength $::auto_mkindex_parser::initCommands]} { return } # Register all of the procedures for the auto_mkindex parser that # will build the "tclIndex" file. # AUTO MKINDEX: proc name arglist body # Adds an entry to the auto index list for the given procedure name. auto_mkindex_parser::command proc {name args} { variable index variable scriptFile # Do some fancy reformatting on the "source" call to handle platform # differences with respect to pathnames. Use format just so that the # command is a little easier to read (otherwise it'd be full of # backslashed dollar signs, etc. append index [list set auto_index([fullname $name])] \ [format { [list source [file join $dir %s]]} \ [file split $scriptFile]] "\n" } # Conditionally add support for Tcl byte code files. There are some # tricky details here. First, we need to get the tbcload library # initialized in the current interpreter. We cannot load tbcload into the # slave until we have done so because it needs access to the tcl_patchLevel # variable. Second, because the package index file may defer loading the # library until we invoke a command, we need to explicitly invoke auto_load # to force it to be loaded. This should be a noop if the package has # already been loaded auto_mkindex_parser::hook { if {![catch {package require tbcload}]} { if {[namespace which -command tbcload::bcproc] eq ""} { auto_load tbcload::bcproc } load {} tbcload $auto_mkindex_parser::parser # AUTO MKINDEX: tbcload::bcproc name arglist body # Adds an entry to the auto index list for the given pre-compiled # procedure name. auto_mkindex_parser::commandInit tbcload::bcproc {name args} { variable index variable scriptFile # Do some nice reformatting of the "source" call, to get around # path differences on different platforms. We use the format # command just so that the code is a little easier to read. append index [list set auto_index([fullname $name])] \ [format { [list source [file join $dir %s]]} \ [file split $scriptFile]] "\n" } } } # AUTO MKINDEX: namespace eval name command ?arg arg...? # Adds the namespace name onto the context stack and evaluates the # associated body of commands. # # AUTO MKINDEX: namespace import ?-force? pattern ?pattern...? # Performs the "import" action in the parser interpreter. This is # important for any commands contained in a namespace that affect # the index. For example, a script may say "itcl::class ...", # or it may import "itcl::*" and then say "class ...". This # procedure does the import operation, but keeps track of imported # patterns so we can remove the imports later. auto_mkindex_parser::command namespace {op args} { switch -- $op { eval { variable parser variable contextStack set name [lindex $args 0] set args [lrange $args 1 end] set contextStack [linsert $contextStack 0 $name] $parser eval [list _%@namespace eval $name] $args set contextStack [lrange $contextStack 1 end] } import { variable parser variable imports foreach pattern $args { if {$pattern ne "-force"} { lappend imports $pattern } } catch {$parser eval "_%@namespace import $args"} } } } return
/home/sudancam/../../usr/./share/tcl8.5/./auto.tcl