diff options
Diffstat (limited to 'library/auto.tcl')
| -rw-r--r-- | library/auto.tcl | 285 |
1 files changed, 141 insertions, 144 deletions
diff --git a/library/auto.tcl b/library/auto.tcl index 55fc90f..c84ab58 100644 --- a/library/auto.tcl +++ b/library/auto.tcl @@ -1,47 +1,47 @@ # auto.tcl -- # -# utility procs formerly in init.tcl dealing with auto execution -# of commands and can be auto loaded themselves. +# 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. +# 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. +# 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: +# 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} + 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] - } + } elseif {[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. +# 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") @@ -63,24 +63,21 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { if {[info exists the_library] && $the_library ne ""} { lappend dirs $the_library } else { - # Do the canonical search - # 1. From an environment variable, if it exists. - # Placing this first gives the end-user ultimate control - # to work-around any bugs, or to customize. + # 1. From an environment variable, if it exists. Placing this first + # gives the end-user ultimate control to work-around any bugs, or + # to customize. if {[info exists env($enVarName)]} { lappend dirs $env($enVarName) } - # 2. In the package script directory registered within - # the configuration of the package itself. + # 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 $value + catch { + lappend dirs [::${basename}::pkgconfig get scriptdir,runtime] } # 3. Relative to auto_path directories. This checks relative to the @@ -88,8 +85,10 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { # 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"} { + if { + $::tcl_platform(platform) eq "unix" + && $::tcl_platform(os) eq "Darwin" + } then { # 4. On MacOSX, check the Resources/Scripts subdir too lappend dirs [file join $d $basename$version Resources Scripts] } @@ -100,8 +99,8 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { # ../../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. + # 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 @@ -124,17 +123,19 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { # 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. + # 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($norm) "" + if {[info exists seen($norm)]} { + continue + } + set seen($norm) {} lappend uniqdirs $i } set dirs $uniqdirs @@ -142,16 +143,15 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { 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 + # 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 $opts -errorinfo]\n } + append errors "$file: $msg\n" + append errors [dict get $opts -errorinfo]\n } } unset -nocomplain the_library @@ -166,28 +166,28 @@ proc tcl_findLibrary {basename version patch initScript enVarName varName} { # ---------------------------------------------------------------------- # 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. +# 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. +# 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: +# 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. + +# 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]} { @@ -196,7 +196,6 @@ proc auto_mkindex {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" @@ -205,18 +204,18 @@ proc auto_mkindex {dir args} { 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} { + if {![llength $args]} { set args *.tcl } auto_mkindex_parser::init foreach file [glob -- {*}$args] { - if {[catch {auto_mkindex_parser::mkindex $file} msg opts] == 0} { - append index $msg - } else { - cd $oldDir + try { + append index [auto_mkindex_parser::mkindex $file] + } on error {msg opts} { + cd $oldDir return -options $opts $msg - } + } } auto_mkindex_parser::cleanup @@ -226,8 +225,8 @@ proc auto_mkindex {dir args} { cd $oldDir } -# Original version of auto_mkindex that just searches the source -# code for "proc" at the beginning of the line. +# 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] @@ -240,7 +239,7 @@ proc auto_mkindex_old {dir args} { 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} { + if {![llength $args]} { set args *.tcl } foreach file [glob -- {*}$args] { @@ -278,9 +277,9 @@ proc auto_mkindex_old {dir args} { } # 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. +# 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 @@ -332,12 +331,12 @@ namespace eval auto_mkindex_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. +# 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: +# Arguments: # file Name of Tcl source file to be indexed. proc auto_mkindex_parser::mkindex {file} { @@ -353,14 +352,13 @@ proc auto_mkindex_parser::mkindex {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. + # 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 "" @@ -377,10 +375,10 @@ proc auto_mkindex_parser::mkindex {file} { # 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 +# 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 @@ -390,30 +388,30 @@ proc auto_mkindex_parser::hook {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. +# 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. + # 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. +# 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. +# 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. @@ -426,8 +424,8 @@ proc auto_mkindex_parser::command {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. +# 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. @@ -446,25 +444,23 @@ proc auto_mkindex_parser::commandInit {name arglist body} { } 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. + # 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: + + # 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 + # 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 + # 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" @@ -476,15 +472,14 @@ proc auto_mkindex_parser::commandInit {name arglist body} { } # 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. +# +# 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. @@ -507,8 +502,8 @@ proc auto_mkindex_parser::fullname {name} { set name "::$name" } - # Earlier, mkindex replaced all $'s with \0. Now, we have to reverse - # that replacement. + # Earlier, mkindex replaced all $'s with \0. Now, we have to reverse that + # replacement. return [string map [list \0 \$] $name] } @@ -516,8 +511,8 @@ if {[llength $::auto_mkindex_parser::initCommands]} { return } -# Register all of the procedures for the auto_mkindex parser that -# will build the "tclIndex" file. +# 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. @@ -527,24 +522,27 @@ auto_mkindex_parser::command proc {name args} { 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 + # 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 +# 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}]} { + 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 } @@ -552,7 +550,7 @@ auto_mkindex_parser::hook { # AUTO MKINDEX: tbcload::bcproc name arglist body # Adds an entry to the auto index list for the given pre-compiled - # procedure name. + # procedure name. auto_mkindex_parser::commandInit tbcload::bcproc {name args} { variable index @@ -568,16 +566,15 @@ auto_mkindex_parser::hook { } # AUTO MKINDEX: namespace eval name command ?arg arg...? -# Adds the namespace name onto the context stack and evaluates the -# associated body of commands. +# 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. +# 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 { |