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652 lines
21 KiB
652 lines
21 KiB
# auto.tcl --
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#
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# utility procs formerly in init.tcl dealing with auto execution of commands
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# and can be auto loaded themselves.
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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 of
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# this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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# auto_reset --
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#
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# Destroy all cached information for auto-loading and auto-execution, so that
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# the information gets recomputed the next time it's needed. Also delete any
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# commands that are listed in the auto-load index.
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#
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# Arguments:
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# None.
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proc auto_reset {} {
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global auto_execs auto_index auto_path
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if {[array exists auto_index]} {
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foreach cmdName [array names auto_index] {
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set fqcn [namespace which $cmdName]
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if {$fqcn eq ""} {
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continue
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}
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rename $fqcn {}
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}
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}
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unset -nocomplain auto_execs auto_index ::tcl::auto_oldpath
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if {[catch {llength $auto_path}]} {
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set auto_path [list [info library]]
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} elseif {[info library] ni $auto_path} {
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lappend auto_path [info library]
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}
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}
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# tcl_findLibrary --
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#
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# This is a utility for extensions that searches for a library directory
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# using a canonical searching algorithm. A side effect is to source the
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# initialization script and set a global library variable.
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#
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# Arguments:
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# basename Prefix of the directory name, (e.g., "tk")
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# version Version number of the package, (e.g., "8.0")
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# patch Patchlevel of the package, (e.g., "8.0.3")
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# initScript Initialization script to source (e.g., tk.tcl)
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# enVarName environment variable to honor (e.g., TK_LIBRARY)
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# varName Global variable to set when done (e.g., tk_library)
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proc tcl_findLibrary {basename version patch initScript enVarName varName} {
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upvar #0 $varName the_library
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global auto_path env tcl_platform
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set dirs {}
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set errors {}
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# The C application may have hardwired a path, which we honor
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if {[info exists the_library] && $the_library ne ""} {
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lappend dirs $the_library
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} else {
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# Do the canonical search
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# 1. From an environment variable, if it exists. Placing this first
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# gives the end-user ultimate control to work-around any bugs, or
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# to customize.
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if {[info exists env($enVarName)]} {
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lappend dirs $env($enVarName)
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}
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# 2. In the package script directory registered within the
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# configuration of the package itself.
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catch {
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lappend dirs [::${basename}::pkgconfig get scriptdir,runtime]
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}
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# 3. Relative to auto_path directories. This checks relative to the
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# Tcl library as well as allowing loading of libraries added to the
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# auto_path that is not relative to the core library or binary paths.
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foreach d $auto_path {
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lappend dirs [file join $d $basename$version]
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if {$tcl_platform(platform) eq "unix"
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&& $tcl_platform(os) eq "Darwin"} {
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# 4. On MacOSX, check the Resources/Scripts subdir too
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lappend dirs [file join $d $basename$version Resources Scripts]
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}
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}
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# 3. Various locations relative to the executable
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# ../lib/foo1.0 (From bin directory in install hierarchy)
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# ../../lib/foo1.0 (From bin/arch directory in install hierarchy)
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# ../library (From unix directory in build hierarchy)
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#
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# Remaining locations are out of date (when relevant, they ought to be
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# covered by the $::auto_path seach above) and disabled.
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#
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# ../../library (From unix/arch directory in build hierarchy)
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# ../../foo1.0.1/library
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# (From unix directory in parallel build hierarchy)
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# ../../../foo1.0.1/library
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# (From unix/arch directory in parallel build hierarchy)
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set parentDir [file dirname [file dirname [info nameofexecutable]]]
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set grandParentDir [file dirname $parentDir]
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lappend dirs [file join $parentDir lib $basename$version]
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lappend dirs [file join $grandParentDir lib $basename$version]
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lappend dirs [file join $parentDir library]
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if {0} {
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lappend dirs [file join $grandParentDir library]
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lappend dirs [file join $grandParentDir $basename$patch library]
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lappend dirs [file join [file dirname $grandParentDir] \
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$basename$patch library]
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}
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}
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# uniquify $dirs in order
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array set seen {}
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foreach i $dirs {
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# Take note that the [file normalize] below has been noted to cause
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# difficulties for the freewrap utility. See Bug 1072136. Until
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# freewrap resolves the matter, one might work around the problem by
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# disabling that branch.
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if {[interp issafe]} {
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set norm $i
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} else {
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set norm [file normalize $i]
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}
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if {[info exists seen($norm)]} {
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continue
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}
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set seen($norm) {}
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lappend uniqdirs $i
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}
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set dirs $uniqdirs
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foreach i $dirs {
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set the_library $i
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set file [file join $i $initScript]
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# source everything when in a safe interpreter because we have a
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# source command, but no file exists command
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if {[interp issafe] || [file exists $file]} {
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if {![catch {uplevel #0 [list source $file]} msg opts]} {
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return
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}
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append errors "$file: $msg\n"
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append errors [dict get $opts -errorinfo]\n
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}
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}
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unset -nocomplain the_library
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set msg "Can't find a usable $initScript in the following directories: \n"
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append msg " $dirs\n\n"
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append msg "$errors\n\n"
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append msg "This probably means that $basename wasn't installed properly.\n"
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error $msg
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}
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# ----------------------------------------------------------------------
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# auto_mkindex
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# ----------------------------------------------------------------------
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# The following procedures are used to generate the tclIndex file from Tcl
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# source files. They use a special safe interpreter to parse Tcl source
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# files, writing out index entries as "proc" commands are encountered. This
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# implementation won't work in a safe interpreter, since a safe interpreter
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# can't create the special parser and mess with its commands.
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if {[interp issafe]} {
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return ;# Stop sourcing the file here
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}
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# auto_mkindex --
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# Regenerate a tclIndex file from Tcl source files. Takes as argument the
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# name of the directory in which the tclIndex file is to be placed, followed
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# by any number of glob patterns to use in that directory to locate all of the
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# relevant files.
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#
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# Arguments:
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# dir - Name of the directory in which to create an index.
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# args - Any number of additional arguments giving the names of files
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# within dir. If no additional are given auto_mkindex will look
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# for *.tcl.
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proc auto_mkindex {dir args} {
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if {[interp issafe]} {
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error "can't generate index within safe interpreter"
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}
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set oldDir [pwd]
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cd $dir
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append index "# Tcl autoload index file, version 2.0\n"
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append index "# This file is generated by the \"auto_mkindex\" command\n"
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append index "# and sourced to set up indexing information for one or\n"
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append index "# more commands. Typically each line is a command that\n"
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append index "# sets an element in the auto_index array, where the\n"
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append index "# element name is the name of a command and the value is\n"
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append index "# a script that loads the command.\n\n"
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if {![llength $args]} {
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set args *.tcl
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}
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auto_mkindex_parser::init
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foreach file [glob -- {*}$args] {
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try {
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append index [auto_mkindex_parser::mkindex $file]
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} on error {msg opts} {
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cd $oldDir
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return -options $opts $msg
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}
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}
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auto_mkindex_parser::cleanup
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set fid [open "tclIndex" w]
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puts -nonewline $fid $index
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close $fid
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cd $oldDir
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}
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# Original version of auto_mkindex that just searches the source code for
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# "proc" at the beginning of the line.
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proc auto_mkindex_old {dir args} {
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set oldDir [pwd]
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cd $dir
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set dir [pwd]
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append index "# Tcl autoload index file, version 2.0\n"
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append index "# This file is generated by the \"auto_mkindex\" command\n"
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append index "# and sourced to set up indexing information for one or\n"
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append index "# more commands. Typically each line is a command that\n"
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append index "# sets an element in the auto_index array, where the\n"
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append index "# element name is the name of a command and the value is\n"
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append index "# a script that loads the command.\n\n"
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if {![llength $args]} {
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set args *.tcl
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}
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foreach file [glob -- {*}$args] {
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set f ""
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set error [catch {
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set f [open $file]
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while {[gets $f line] >= 0} {
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if {[regexp {^proc[ ]+([^ ]*)} $line match procName]} {
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set procName [lindex [auto_qualify $procName "::"] 0]
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append index "set [list auto_index($procName)]"
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append index " \[list source \[file join \$dir [list $file]\]\]\n"
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}
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}
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close $f
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} msg opts]
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if {$error} {
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catch {close $f}
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cd $oldDir
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return -options $opts $msg
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}
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}
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set f ""
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set error [catch {
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set f [open tclIndex w]
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puts -nonewline $f $index
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close $f
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cd $oldDir
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} msg opts]
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if {$error} {
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catch {close $f}
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cd $oldDir
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error $msg $info $code
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return -options $opts $msg
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}
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}
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# Create a safe interpreter that can be used to parse Tcl source files
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# generate a tclIndex file for autoloading. This interp contains commands for
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# things that need index entries. Each time a command is executed, it writes
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# an entry out to the index file.
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namespace eval auto_mkindex_parser {
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variable parser "" ;# parser used to build index
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variable index "" ;# maintains index as it is built
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variable scriptFile "" ;# name of file being processed
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variable contextStack "" ;# stack of namespace scopes
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variable imports "" ;# keeps track of all imported cmds
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variable initCommands ;# list of commands that create aliases
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if {![info exists initCommands]} {
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set initCommands [list]
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}
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proc init {} {
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variable parser
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variable initCommands
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if {![interp issafe]} {
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set parser [interp create -safe]
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$parser hide info
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$parser hide rename
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$parser hide proc
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$parser hide namespace
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$parser hide eval
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$parser hide puts
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foreach ns [$parser invokehidden namespace children ::] {
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# MUST NOT DELETE "::tcl" OR BAD THINGS HAPPEN!
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if {$ns eq "::tcl"} continue
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$parser invokehidden namespace delete $ns
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}
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foreach cmd [$parser invokehidden info commands ::*] {
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$parser invokehidden rename $cmd {}
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}
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$parser invokehidden proc unknown {args} {}
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# We'll need access to the "namespace" command within the
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# interp. Put it back, but move it out of the way.
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$parser expose namespace
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$parser invokehidden rename namespace _%@namespace
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$parser expose eval
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$parser invokehidden rename eval _%@eval
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# Install all the registered psuedo-command implementations
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foreach cmd $initCommands {
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eval $cmd
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}
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}
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}
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proc cleanup {} {
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variable parser
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interp delete $parser
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unset parser
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}
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}
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# auto_mkindex_parser::mkindex --
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#
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# Used by the "auto_mkindex" command to create a "tclIndex" file for the given
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# Tcl source file. Executes the commands in the file, and handles things like
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# the "proc" command by adding an entry for the index file. Returns a string
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# that represents the index file.
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#
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# Arguments:
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# file Name of Tcl source file to be indexed.
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proc auto_mkindex_parser::mkindex {file} {
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variable parser
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variable index
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variable scriptFile
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variable contextStack
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variable imports
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set scriptFile $file
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set fid [open $file]
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set contents [read $fid]
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close $fid
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# There is one problem with sourcing files into the safe interpreter:
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# references like "$x" will fail since code is not really being executed
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# and variables do not really exist. To avoid this, we replace all $ with
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# \0 (literally, the null char) later, when getting proc names we will
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# have to reverse this replacement, in case there were any $ in the proc
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# name. This will cause a problem if somebody actually tries to have a \0
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# in their proc name. Too bad for them.
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set contents [string map [list \$ \0] $contents]
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set index ""
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set contextStack ""
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set imports ""
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$parser eval $contents
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foreach name $imports {
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catch {$parser eval [list _%@namespace forget $name]}
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}
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return $index
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}
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# auto_mkindex_parser::hook command
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#
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# Registers a Tcl command to evaluate when initializing the slave interpreter
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# used by the mkindex parser. The command is evaluated in the master
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# interpreter, and can use the variable auto_mkindex_parser::parser to get to
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# the slave
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proc auto_mkindex_parser::hook {cmd} {
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variable initCommands
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lappend initCommands $cmd
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}
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# auto_mkindex_parser::slavehook command
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#
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# Registers a Tcl command to evaluate when initializing the slave interpreter
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# used by the mkindex parser. The command is evaluated in the slave
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# interpreter.
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proc auto_mkindex_parser::slavehook {cmd} {
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variable initCommands
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# The $parser variable is defined to be the name of the slave interpreter
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# when this command is used later.
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lappend initCommands "\$parser eval [list $cmd]"
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}
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# auto_mkindex_parser::command --
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#
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# Registers a new command with the "auto_mkindex_parser" interpreter that
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# parses Tcl files. These commands are fake versions of things like the
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# "proc" command. When you execute them, they simply write out an entry to a
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# "tclIndex" file for auto-loading.
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#
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# This procedure allows extensions to register their own commands with the
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# auto_mkindex facility. For example, a package like [incr Tcl] might
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# register a "class" command so that class definitions could be added to a
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# "tclIndex" file for auto-loading.
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#
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# Arguments:
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# name Name of command recognized in Tcl files.
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# arglist Argument list for command.
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# body Implementation of command to handle indexing.
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proc auto_mkindex_parser::command {name arglist body} {
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hook [list auto_mkindex_parser::commandInit $name $arglist $body]
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}
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# auto_mkindex_parser::commandInit --
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#
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# This does the actual work set up by auto_mkindex_parser::command. This is
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# called when the interpreter used by the parser is created.
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#
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# Arguments:
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# name Name of command recognized in Tcl files.
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# arglist Argument list for command.
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# body Implementation of command to handle indexing.
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proc auto_mkindex_parser::commandInit {name arglist body} {
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variable parser
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set ns [namespace qualifiers $name]
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set tail [namespace tail $name]
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if {$ns eq ""} {
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set fakeName [namespace current]::_%@fake_$tail
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} else {
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set fakeName [namespace current]::[string map {:: _} _%@fake_$name]
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}
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proc $fakeName $arglist $body
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# YUK! Tcl won't let us alias fully qualified command names, so we can't
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# handle names like "::itcl::class". Instead, we have to build procs with
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# the fully qualified names, and have the procs point to the aliases.
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if {[string match *::* $name]} {
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set exportCmd [list _%@namespace export [namespace tail $name]]
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$parser eval [list _%@namespace eval $ns $exportCmd]
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# The following proc definition does not work if you want to tolerate
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# space or something else diabolical in the procedure name, (i.e.,
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# space in $alias). The following does not work:
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# "_%@eval {$alias} \$args"
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# because $alias gets concat'ed to $args. The following does not work
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# because $cmd is somehow undefined
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# "set cmd {$alias} \; _%@eval {\$cmd} \$args"
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# A gold star to someone that can make test autoMkindex-3.3 work
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# properly
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set alias [namespace tail $fakeName]
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$parser invokehidden proc $name {args} "_%@eval {$alias} \$args"
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$parser alias $alias $fakeName
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} else {
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$parser alias $name $fakeName
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}
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return
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}
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# auto_mkindex_parser::fullname --
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#
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# Used by commands like "proc" within the auto_mkindex parser. Returns the
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# qualified namespace name for the "name" argument. If the "name" does not
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# start with "::", elements are added from the current namespace stack to
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# produce a qualified name. Then, the name is examined to see whether or not
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# it should really be qualified. If the name has more than the leading "::",
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# it is returned as a fully qualified name. Otherwise, it is returned as a
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# simple name. That way, the Tcl autoloader will recognize it properly.
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#
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# Arguments:
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# name - Name that is being added to index.
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proc auto_mkindex_parser::fullname {name} {
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variable contextStack
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if {![string match ::* $name]} {
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foreach ns $contextStack {
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set name "${ns}::$name"
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if {[string match ::* $name]} {
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break
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}
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}
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}
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if {[namespace qualifiers $name] eq ""} {
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set name [namespace tail $name]
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} elseif {![string match ::* $name]} {
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set name "::$name"
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}
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# Earlier, mkindex replaced all $'s with \0. Now, we have to reverse that
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# replacement.
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return [string map [list \0 \$] $name]
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}
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# auto_mkindex_parser::indexEntry --
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#
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# Used by commands like "proc" within the auto_mkindex parser to add a
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# correctly-quoted entry to the index. This is shared code so it is done
|
|
# *right*, in one place.
|
|
#
|
|
# Arguments:
|
|
# name - Name that is being added to index.
|
|
|
|
proc auto_mkindex_parser::indexEntry {name} {
|
|
variable index
|
|
variable scriptFile
|
|
|
|
# We convert all metacharacters to their backslashed form, and pre-split
|
|
# the file name that we know about (which will be a proper list, and so
|
|
# correctly quoted).
|
|
|
|
set name [string range [list \}[fullname $name]] 2 end]
|
|
set filenameParts [file split $scriptFile]
|
|
|
|
append index [format \
|
|
{set auto_index(%s) [list source [file join $dir %s]]%s} \
|
|
$name $filenameParts \n]
|
|
return
|
|
}
|
|
|
|
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} {
|
|
indexEntry $name
|
|
}
|
|
|
|
# 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 {
|
|
try {
|
|
package require tbcload
|
|
} on error {} {
|
|
# OK, don't have it so do nothing
|
|
} on ok {} {
|
|
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} {
|
|
indexEntry $name
|
|
}
|
|
}
|
|
}
|
|
|
|
# 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"}
|
|
}
|
|
ensemble {
|
|
variable parser
|
|
variable contextStack
|
|
if {[lindex $args 0] eq "create"} {
|
|
set name ::[join [lreverse $contextStack] ::]
|
|
catch {
|
|
set name [dict get [lrange $args 1 end] -command]
|
|
if {![string match ::* $name]} {
|
|
set name ::[join [lreverse $contextStack] ::]$name
|
|
}
|
|
regsub -all ::+ $name :: name
|
|
}
|
|
# create artifical proc to force an entry in the tclIndex
|
|
$parser eval [list ::proc $name {} {}]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# AUTO MKINDEX: oo::class create name ?definition?
|
|
# Adds an entry to the auto index list for the given class name.
|
|
auto_mkindex_parser::command oo::class {op name {body ""}} {
|
|
if {$op eq "create"} {
|
|
indexEntry $name
|
|
}
|
|
}
|
|
auto_mkindex_parser::command class {op name {body ""}} {
|
|
if {$op eq "create"} {
|
|
indexEntry $name
|
|
}
|
|
}
|
|
|
|
return
|