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Diffstat (limited to 'library/auto.tcl')
| -rw-r--r-- | library/auto.tcl | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/library/auto.tcl b/library/auto.tcl new file mode 100644 index 0000000..c2050e5 --- /dev/null +++ b/library/auto.tcl @@ -0,0 +1,203 @@ +# auto.tcl -- +# +# utility procs formerly in init.tcl dealing with auto execution +# of commands and can be auto loaded themselves. +# +# SCCS: @(#) auto.tcl 1.1 98/01/07 11:21:02 +# +# 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_execok -- +# +# Returns string that indicates name of program to execute if +# name corresponds to a shell builtin or an executable in the +# Windows search path, or "" otherwise. Builds an associative +# array auto_execs that caches information about previous checks, +# for speed. +# +# Arguments: +# name - Name of a command. + +if {[string compare $tcl_platform(platform) windows] == 0} { +# Windows version. +# +# Note that info executable doesn't work under Windows, so we have to +# look for files with .exe, .com, or .bat extensions. Also, the path +# may be in the Path or PATH environment variables, and path +# components are separated with semicolons, not colons as under Unix. +# + proc auto_execok name { + global auto_execs env tcl_platform + + if {[info exists auto_execs($name)]} { + return $auto_execs($name) + } + set auto_execs($name) "" + + if {[lsearch -exact {cls copy date del erase dir echo mkdir md rename + ren rmdir rd time type ver vol} $name] != -1} { + return [set auto_execs($name) [list $env(COMSPEC) /c $name]] + } + + if {[llength [file split $name]] != 1} { + foreach ext {{} .com .exe .bat} { + set file ${name}${ext} + if {[file exists $file] && ![file isdirectory $file]} { + return [set auto_execs($name) [list $file]] + } + } + return "" + } + + set path "[file dirname [info nameof]];.;" + if {[info exists env(WINDIR)]} { + set windir $env(WINDIR) + } + if {[info exists windir]} { + if {$tcl_platform(os) == "Windows NT"} { + append path "$windir/system32;" + } + append path "$windir/system;$windir;" + } + + if {[info exists env(PATH)]} { + append path $env(PATH) + } + + foreach dir [split $path {;}] { + if {$dir == ""} { + set dir . + } + foreach ext {{} .com .exe .bat} { + set file [file join $dir ${name}${ext}] + if {[file exists $file] && ![file isdirectory $file]} { + return [set auto_execs($name) [list $file]] + } + } + } + return "" +} + +} else { +# Unix version. +# +proc auto_execok name { + global auto_execs env + + if {[info exists auto_execs($name)]} { + return $auto_execs($name) + } + set auto_execs($name) "" + if {[llength [file split $name]] != 1} { + if {[file executable $name] && ![file isdirectory $name]} { + set auto_execs($name) [list $name] + } + return $auto_execs($name) + } + foreach dir [split $env(PATH) :] { + if {$dir == ""} { + set dir . + } + set file [file join $dir $name] + if {[file executable $file] && ![file isdirectory $file]} { + set auto_execs($name) [list $file] + return $auto_execs($name) + } + } + return "" +} + +} +# 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 procedures that are listed in the auto-load index +# except those defined in this file. +# +# Arguments: +# None. + +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 + tclMacPkgSearch tclPkgUnknown} $p] < 0)} { + rename $p {} + } + } + catch {unset auto_execs} + catch {unset auto_index} + catch {unset auto_oldpath} +} + +# 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. It does not parse or source the file +# so the generated index will not contain the appropriate namespace qualifiers +# if you don't explicitly specify it. +# +# 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} { + global errorCode errorInfo + set oldDir [pwd] + cd $dir + set dir [pwd] + append index "# Tcl autoload index file, version 2.0\n" + append index "# This file is generated by the \"auto_mkindex\" command\n" + append index "# and sourced to set up indexing information for one or\n" + append index "# more commands. Typically each line is a command that\n" + append index "# sets an element in the auto_index array, where the\n" + append index "# element name is the name of a command and the value is\n" + append index "# a script that loads the command.\n\n" + if {$args == ""} { + set args *.tcl + } + foreach file [eval 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 $f + } msg] + if {$error} { + set code $errorCode + set info $errorInfo + catch {close $f} + cd $oldDir + error $msg $info $code + } + } + set f "" + set error [catch { + set f [open tclIndex w] + puts $f $index nonewline + close $f + cd $oldDir + } msg] + if {$error} { + set code $errorCode + set info $errorInfo + catch {close $f} + cd $oldDir + error $msg $info $code + } +} |