From fa5dd9800de17f5bee5f55d5fc4e1f3d1eae8a1b Mon Sep 17 00:00:00 2001
From: Steve Huntley <stephen.huntley@alum.mit.edu>
Date: Wed, 30 Mar 2011 05:14:58 +0000
Subject: [PATCH] 2011-03-30  Steve Huntley  <stephen.huntley@alum.mit.edu>

	* globfind.tcl: Updated to latest file version (1.5.3).
---
 ChangeLog                     |   4 +
 library/template/globfind.tcl | 854 ++++++++++++++++++++--------------
 2 files changed, 520 insertions(+), 338 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index fbb1644..504f687 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-03-30  Steve Huntley  <stephen.huntley@alum.mit.edu>
+
+	* globfind.tcl: Updated to latest file version (1.5.3).
+
 2010-12-31  Steve Huntley  <stephen.huntley@alum.mit.edu>
 
 	* vfs.tcl: Removed requirement for 8.6 for sourcing of vfslib.tcl, since
diff --git a/library/template/globfind.tcl b/library/template/globfind.tcl
index c558eb5..6f1c88f 100644
--- a/library/template/globfind.tcl
+++ b/library/template/globfind.tcl
@@ -1,338 +1,516 @@
-if 0 {
-########################
-
-globfind.tcl --
-
-Written by Stephen Huntley (stephen.huntley@alum.mit.edu)
-License: Tcl license
-Version 1.5
-
-The proc globfind is a replacement for tcllib's fileutil::find
-
-Usage: globfind ?basedir ?filtercmd? ?switches??
-
-Options:
-
-basedir - the directory from which to start the search.  Defaults to current directory.
-
-filtercmd - Tcl command; for each file found in the basedir, the filename will be
-appended to filtercmd and the result will be evaluated.  The evaluation should return
-0 or 1; only files whose return code is 1 will be included in the final return result.
-
-switches - The switches will "prefilter" the results before the filtercmd is applied.  The
-available switches are:
-
-	-depth   - sets the number of levels down from the basedir into which the 
-		     filesystem hierarchy will be searched. A value of zero is interpreted
-		     as infinite depth.
-
-	-pattern - a glob-style filename-matching wildcard. ex: -pattern *.pdf
-
-	-types   - any value acceptable to the "types" switch of the glob command.
-		     ex: -types {d hidden}
-
-Side effects:
-
-If somewhere within the search space a directory is a link to another directory within
-the search space, then the variable ::globfind::REDUNDANCY will be set to 1 (otherwise
-it will be set to 0).  The name of the redundant directory will be appended to the
-variable ::globfind::redundant_files.  This may be used to help track down and eliminate
-infinitely looping links in the search space.
-
-Unlike fileutil::find, the name of the basedir will be included in the results if it fits
-the prefilter and filtercmd criteria (thus emulating the behavior of the standard Unix 
-GNU find utility).
-
-----
-
-globfind is designed as a fast and simple alternative to fileutil::find.  It takes 
-advantage of glob's ability to use multiple patterns to scan deeply into a directory 
-structure in a single command, hence the name.
-
-It reports symbolic links along with other files by default, but checks for nesting of
-links which might otherwise lead to infinite search loops.  It reports hidden files by
-default unless the -types switch is used to specify exactly what is wanted.
-
-globfind may be used with Tcl versions earlier than 8.4, but emulation of missing
-features of the glob command in those versions will result in slower performance.
-
-globfind is generally two to three times faster than fileutil::find, and fractionally
-faster than perl's File::Find function for comparable searches.
-
-The filtercmd may be omitted if only prefiltering is desired; in this case it may be a 
-bit faster to use the proc globtraverse, which uses the same basedir value and 
-command-line switches as globfind, but does not take a filtercmd value.
-
-If one wanted to search for pdf files for example, one could use the command:
-
-	globfind $basedir {string match -nocase *.pdf}
-
-It would, however, in this case be much faster to use:
-
-	globtraverse $basedir -pattern *.pdf
-
-########################
-}
-
-
-package provide fileutil::globfind 1.5
-
-namespace eval ::fileutil::globfind {
-
-namespace export globfind globtraverse
-
-proc globfind {{basedir .} {filtercmd {}} args} {
-	set returnFiles {}
-	set types {}
-	set basedir [file normalize $basedir]
-
-	# account for possibility that filtercmd is missing by 
-	# reformatting $args variable: 
-	set args [concat [list $filtercmd] $args]
-	if [expr fmod([llength $args],2)] {
-		set filtercmd [lindex $args 0]
-		set args [lrange $args 1 end]
-	} else {
-		set filtercmd {}
-	}
-
-	set filt [string length $filtercmd]
-	set 83ok [package vsatisfies [package present Tcl] 8.3]
-
-	# process command-line switches:
-	foreach {flag value} $args {
-		if {[string first $flag -types] >= 0} {set flag "-types"}
-		if {[string first $flag -pattern] >= 0} {set flag "-pattern"}
-		if {[string first $flag -depth] >= 0} {set flag "-depth"}
-
-		switch -- $flag {
-			-types {
-				set types [list $value]
-
-				# can't use -types pre-8.3, because it doesn't exist in glob command.
-				# thus if it is specified, error out:
-				if !$83ok {error {error: "-types" flag not supported in version 8.2 and earlier}}
-
-				# bug in 8.3, if -types {hidden f} is used, possible crash.  So disallow:
-				if {(![package vcompare [package present Tcl] 8.3]) && ($tcl_platform(platform) == "unix") && ([lsearch $types "hidden"] >= 0) && ([lsearch $types "f"] >= 0)} {
-					error {Tcl 8.3 bug: potential program crash if "-types {hidden f}" used}
-				}
-
-				set types "-types $types"
-			}
-			-pattern {set pattern [list $value]}
-			-depth {set depth [expr [list $value]]}
-			default {error "$flag: incorrect flag value"}
-		}
-	}
-
-	# add basedir to result if it satisfies prefilter conditions:
-	set returnFiles [eval [eval list globtraverse [list [file dirname $basedir]] $args -depth 1]]
-	if {[lsearch -exact $returnFiles $basedir] >= 0} {set returnFiles [list $basedir]} else {set returnFiles {}}
-	# get all files in basedir that satisfy prefilter conditions:
-	set returnFiles [concat $returnFiles [eval [eval list globtraverse \$basedir $args]]]
-
-	# get hidden files if no specific types requested:
-	if {$types == {}} {
-		
-		# save redundant file values already gathered:
-		set redundant_files {}
-		if [set REDUNDANCY $[namespace current]::REDUNDANCY] {
-			set redundant_files $[namespace current]::redundant_files
-		}
-
-		# get hidden files:
-		set returnFiles [concat $returnFiles [eval [eval list globtraverse \$basedir $args -type hidden]]]
-
-		# virtual filesystems ignore hidden tag, so just in case, filter out duplicates:
-		set returnFiles [lsort -unique $returnFiles]
-
-		# collate redundant file info:
-		if $[namespace current]::REDUNDANCY {
-			set [namespace current]::redundant_files [concat $[namespace current]::redundant_files $redundant_files]
-		} else {
-			set [namespace current]::redundant_files $redundant_files
-		}
-		set [namespace current]::REDUNDANCY [expr ($[namespace current]::REDUNDANCY || $REDUNDANCY)]
-	}
-
-	# apply filtercmd to prefiltered results if one is specified:
-	if $filt {
-		set filterFiles {}
-		foreach filename $returnFiles {
-			if [uplevel $filtercmd [list $filename]] {
-				lappend filterFiles $filename
-			}
-		}
-	} else {
-		set filterFiles $returnFiles
-	}
-
-	return $filterFiles
-}
-
-proc globtraverse {{basedir .} args} {
-	set [namespace current]::REDUNDANCY 0
-	unset -nocomplain [namespace current]::redundant_files
-	set depth 0
-
-	# search 16 directory levels per iteration, glob can't handle more patterns than that at once.
-	set maxDepth 16
-
-	set pattern *
-	set types {}
-	set resultList {}
-
-	set basedir [file normalize $basedir]
-	if ![file isdirectory $basedir] {return}
-
-	set baseDepth [llength [file split $basedir]] ; # calculate starting depth
-
-	lappend checkDirs $basedir ; # initialize list of dirs to check
-
-	# format basedir variable for later infinite loop checking:
-	set basedir $basedir/
-	set basedir [string map {// /} $basedir]
-
-	set 83ok [package vsatisfies [package present Tcl] 8.3]
-
-	# process command-line switches:
-	foreach {flag value} $args {
-		if {[string first $flag -types] >= 0} {set flag "-types"}
-		if {[string first $flag -pattern] >= 0} {set flag "-pattern"}
-		if {[string first $flag -depth] >= 0} {set flag "-depth"}
-
-		switch -- $flag {
-			-types {
-				set types [list $value]
-				if !$83ok {error {error: "-types" flag not supported in version 8.2 and earlier}}
-				if {(![package vcompare [package present Tcl] 8.3]) && ($tcl_platform(platform) == "unix") && ([lsearch $types "hidden"] >= 0) && ([lsearch $types "f"] >= 0)} {
-					error {Tcl 8.3 bug: potential program crash if "-types {hidden f}" used}
-				}
-				set types "-types $types"
-			}
-			-pattern {set pattern [list $value]}
-			-depth {set depth [expr [list $value]]}
-			default {error "$flag: incorrect flag value"}
-		}
-	}
-
-	# Main result-gathering loop:
-	while {[llength $checkDirs]} {
-		set currentDir [lindex $checkDirs 0]
-
-		set currentDepth [expr [llength [file split $currentDir]] - $baseDepth] ; # distance from start depth
-
-		set searchDepth [expr $depth - $currentDepth] ; # distance from max depth to search to
-
-		# build multi-pattern argument to feed to glob command:
-		set globPatternTotal {}
-		set globPattern *
-		set incrPattern /*
-		for {set i 1} {$i <= $maxDepth} {incr i} {
-			set customPattern [string range $globPattern 0 end-1]
-			append customPattern $pattern
-			lappend globPatternTotal $customPattern
-			append globPattern $incrPattern
-			incr searchDepth -1
-			if {$searchDepth == 0} {break}
-		}
-
-		# save pattern to use for iterative dir search later:
-		set dirPattern [string range $globPattern 0 end-2]
-
-		# glob pre-8.3 doesn't support -directory switch; emulate it if necessary:
-		if $83ok {
-			set contents [eval glob -nocomplain -directory \$currentDir $types -- $globPatternTotal]
-		} else {
-			set wd [pwd]
-			set newContents {}
-			cd $currentDir
-			if [catch {set contents [eval glob -nocomplain -- $globPatternTotal]} err] {
-				cd $wd
-				error $err
-			}
-			cd $wd
-			foreach item $contents {
-				set item [file join $currentDir $item]
-				lappend newContents $item
-			}
-			set contents $newContents
-			unset newContents
-		}
-		set resultList [concat $resultList $contents]
-
-		# check if iterative dir search is necessary (if specified depth not yet reached):
-		set contents {}
-		set findDirs 1
-		if {([expr $currentDepth + [llength [file split $dirPattern]]] >= $depth) && ($depth > 0)} {set findDirs 0}
-
-		# find dirs at current depth boundary to prime iterative search.
-		# Pre-8.3 glob doesn't support -type or -dir switches; emulate if necessary:
-		if {$83ok && $findDirs} {
-			set contents [glob -nocomplain -directory $currentDir -type d -- $dirPattern]
-		} elseif $findDirs {
-			set wd [pwd]
-			set newContents {}
-			cd $currentDir
-			if [catch {set contents [glob -nocomplain -- $dirPattern/]} err] {
-				cd $wd
-				error $err
-			}
-			cd $wd
-			foreach item $contents {
-				set item [file join $currentDir [string range $item 0 end-1]]
-				lappend newContents $item
-			}
-			set contents $newContents
-			unset newContents
-		}
-
-		# check for redundant links in dir list:
-		set contentLength [llength $contents]
-		set i 0
-		while {$i < $contentLength} {
-			set item [lindex $contents end-$i]
-			incr i
-			
-			# kludge to fully resolve link to native name:
-			set linkValue [file dirname [file normalize [file join $item __dummy__]]]
-
-			# if item is a link, and native name is already in the search space, skip it:
-			if {($linkValue != $item) && (![string first $basedir $linkValue])} {
-				set [namespace current]::REDUNDANCY 1
-				lappend [namespace current]::redundant_files $item
-				continue
-			}
-
-			lappend checkDirs $item			
-		}
-
-		# remove current search dir from search list to prime for next iteration:
-		set checkDirs [lrange $checkDirs 1 end]
-	}	
-	return $resultList
-}
-
-# Tcl pre-8.4 lacks [file normalize] command; emulate it if necessary:
-proc ::fileutil::globfind::file {args} {
-	if {[lindex $args 0] == "normalize"} {
-		set filename [lindex $args 1]
-		set tail [file tail $filename]
-		set filename [::fileutil::fullnormalize [file dirname $filename]]
-		set filename [file join $filename $tail]
-		return $filename
-	} else {
-		return [uplevel ::file $args]
-	}
-}
-
-# Eliminate emulation of [file normalize] if version 8.4 or better:
-if [package vsatisfies [package present Tcl] 8.4] {
-	rename ::fileutil::globfind::file {}
-} else {
-	package require fileutil 1.13
-}
-
-}
-# end namespace ::fileutil::globfind
+if 0 {
+########################
+
+globfind.tcl --
+
+Written by Stephen Huntley (stephen.huntley@alum.mit.edu)
+License: Tcl license
+Version 1.5.3
+
+The proc globfind is a replacement for tcllib's fileutil::find
+
+Usage: globfind ?basedir ?filtercmd? ?switches??
+
+Options:
+
+basedir - the directory from which to start the search.  Defaults to current directory.
+
+filtercmd - Tcl command; for each file found in the basedir, the filename will be
+appended to filtercmd and the result will be evaluated.  The evaluation should return
+0 or 1; only files whose return code is 1 will be included in the final return result.
+
+switches - The switches will "prefilter" the results before the filtercmd is applied.  The
+available switches are:
+
+	-depth   - sets the number of levels down from the basedir into which the 
+		     filesystem hierarchy will be searched. A value of zero is interpreted
+		     as infinite depth.
+
+	-pattern - a glob-style filename-matching wildcard. ex: -pattern *.pdf
+
+	-types   - any value acceptable to the "types" switch of the glob command.
+		     ex: -types {d hidden}
+
+Side effects:
+
+If somewhere within the search space a directory is a link to another directory within
+the search space, then the variable ::fileutil::globfind::REDUNDANCY will be set to 1 
+(otherwise it will be set to 0).  The name of the redundant directory will be appended to the
+variable ::fileutil::globfind::redundant_files.  This information may be used to help track down 
+and eliminate infinitely looping links in the search space.
+
+Unlike fileutil::find, the name of the basedir will be included in the results if it fits
+the prefilter and filtercmd criteria (thus emulating the behavior of the standard Unix 
+GNU find utility).
+
+----
+
+globfind is designed as a fast and simple alternative to fileutil::find.  It takes 
+advantage of glob's ability to use multiple patterns to scan deeply into a directory 
+structure in a single command, hence the name.
+
+It reports symbolic links along with other files by default, but checks for nesting of
+links which might otherwise lead to infinite search loops.  It reports hidden files by
+default unless the -types switch is used to specify exactly what is wanted.
+
+globfind may be used with Tcl versions earlier than 8.4, but emulation of missing
+features of the glob command in those versions will result in slower performance.
+
+globfind is generally two to three times faster than fileutil::find, and fractionally
+faster than perl's File::Find function for comparable searches.
+
+The filtercmd may be omitted if only prefiltering is desired; in this case it may be a 
+bit faster to use the proc globtraverse, which uses the same basedir value and 
+command-line switches as globfind, but does not take a filtercmd value.
+
+If one wanted to search for pdf files for example, one could use the command:
+
+	globfind $basedir {string match -nocase *.pdf}
+
+It would, however, in this case be much faster to use:
+
+	globtraverse $basedir -pattern *.pdf
+
+########################
+}
+
+
+package provide fileutil::globfind 1.5
+
+namespace eval ::fileutil::globfind {
+
+namespace export globfind globtraverse
+
+proc globfind {{basedir .} {filtercmd {}} args} {
+	set returnFiles {}
+	set types {}
+	set basedir [file normalize $basedir]
+
+	# account for possibility that filtercmd is missing by 
+	# reformatting $args variable: 
+	set args [concat [list $filtercmd] $args]
+	if [expr fmod([llength $args],2)] {
+		set filtercmd [lindex $args 0]
+		set args [lrange $args 1 end]
+	} else {
+		set filtercmd {}
+	}
+
+	set filt [string length $filtercmd]
+	set 83ok [package vsatisfies [package present Tcl] 8.3]
+
+	# process command-line switches:
+	foreach {flag value} $args {
+		if {[string first $flag -types] >= 0} {set flag "-types"}
+		if {[string first $flag -pattern] >= 0} {set flag "-pattern"}
+		if {[string first $flag -depth] >= 0} {set flag "-depth"}
+
+		switch -- $flag {
+			-types {
+				set types [list $value]
+
+				# can't use -types pre-8.3, because it doesn't exist in glob command.
+				# thus if it is specified, error out:
+				if !$83ok {error {error: "-types" flag not supported in version 8.2 and earlier}}
+
+				# bug in 8.3, if -types {hidden f} is used, possible crash.  So disallow:
+				if {(![package vcompare [package present Tcl] 8.3]) && ($tcl_platform(platform) == "unix") && ([lsearch $types "hidden"] >= 0) && ([lsearch $types "f"] >= 0)} {
+					error {Tcl 8.3 bug: potential program crash if "-types {hidden f}" used}
+				}
+
+				set types "-types $types"
+			}
+			-pattern {set pattern [list $value]}
+			-depth {set depth [expr [list $value]]}
+			default {error "$flag: incorrect flag value"}
+		}
+	}
+
+	# add basedir to result if it satisfies prefilter conditions:
+	set returnFiles [eval [eval list globtraverse [list [file dirname $basedir]] $args -depth 1]]
+	if {[lsearch -exact $returnFiles $basedir] >= 0} {set returnFiles [list $basedir]} else {set returnFiles {}}
+	# get all files in basedir that satisfy prefilter conditions:
+	set returnFiles [concat $returnFiles [eval [eval list globtraverse \$basedir $args]]]
+
+	# get hidden files if no specific types requested:
+	if {$types == {}} {
+		
+		# save redundant file values already gathered:
+		set redundant_files {}
+		if [set REDUNDANCY $[namespace current]::REDUNDANCY] {
+			set redundant_files $[namespace current]::redundant_files
+		}
+
+		# get hidden files:
+		set returnFiles [concat $returnFiles [eval [eval list globtraverse \$basedir $args -type hidden]]]
+
+		# virtual filesystems ignore hidden tag, so just in case, filter out duplicates:
+		set returnFiles [lsort -unique $returnFiles]
+
+		# collate redundant file info:
+		if $[namespace current]::REDUNDANCY {
+			set [namespace current]::redundant_files [concat $[namespace current]::redundant_files $redundant_files]
+		} else {
+			set [namespace current]::redundant_files $redundant_files
+		}
+		set [namespace current]::REDUNDANCY [expr ($[namespace current]::REDUNDANCY || $REDUNDANCY)]
+	}
+
+	# apply filtercmd to prefiltered results if one is specified:
+	if $filt {
+		set filterFiles {}
+		foreach filename $returnFiles {
+			if [uplevel $filtercmd [list $filename]] {
+				lappend filterFiles $filename
+			}
+		}
+	} else {
+		set filterFiles $returnFiles
+	}
+
+	return $filterFiles
+}
+
+proc globtraverse {{basedir .} args} {
+	set [namespace current]::REDUNDANCY 0
+	unset -nocomplain [namespace current]::redundant_files
+	set depth 0
+
+	# search 16 directory levels per iteration, glob can't handle more patterns than that at once.
+	set maxDepth 16
+
+	set pattern *
+	set types {}
+	set resultList {}
+
+	set basedir [file normalize $basedir]
+	if ![file isdirectory $basedir] {return}
+
+	set baseDepth [llength [file split $basedir]] ; # calculate starting depth
+
+	lappend checkDirs $basedir ; # initialize list of dirs to check
+
+	# format basedir variable for later infinite loop checking:
+	set basedir $basedir/
+	set basedir [string map {// /} $basedir]
+
+	set 83ok [package vsatisfies [package present Tcl] 8.3]
+
+	# process command-line switches:
+	foreach {flag value} $args {
+		if {[string first $flag -types] >= 0} {set flag "-types"}
+		if {[string first $flag -pattern] >= 0} {set flag "-pattern"}
+		if {[string first $flag -depth] >= 0} {set flag "-depth"}
+
+		switch -- $flag {
+			-types {
+				set types [list $value]
+				if !$83ok {error {error: "-types" flag not supported in version 8.2 and earlier}}
+				if {(![package vcompare [package present Tcl] 8.3]) && ($tcl_platform(platform) == "unix") && ([lsearch $types "hidden"] >= 0) && ([lsearch $types "f"] >= 0)} {
+					error {Tcl 8.3 bug: potential program crash if "-types {hidden f}" used}
+				}
+				set types "-types $types"
+			}
+			-pattern {set pattern [list $value]}
+			-depth {set depth [expr [list $value]]}
+			default {error "$flag: incorrect flag value"}
+		}
+	}
+
+	# Main result-gathering loop:
+	while {[llength $checkDirs]} {
+		set currentDir [lindex $checkDirs 0]
+
+		set currentDepth [expr [llength [file split $currentDir]] - $baseDepth] ; # distance from start depth
+
+		set searchDepth [expr $depth - $currentDepth] ; # distance from max depth to search to
+
+		# build multi-pattern argument to feed to glob command:
+		set globPatternTotal {}
+		set globPattern *
+		set incrPattern /*
+		for {set i 1} {$i <= $maxDepth} {incr i} {
+			set customPattern [string range $globPattern 0 end-1]
+			append customPattern $pattern
+			lappend globPatternTotal $customPattern
+			append globPattern $incrPattern
+			incr searchDepth -1
+			if {$searchDepth == 0} {break}
+		}
+
+		# save pattern to use for iterative dir search later:
+		set dirPattern [string range $globPattern 0 end-2]
+
+		# glob pre-8.3 doesn't support -directory switch; emulate it if necessary:
+		if $83ok {
+			set contents [eval glob -nocomplain -directory \$currentDir $types -- $globPatternTotal]
+		} else {
+			set wd [pwd]
+			set newContents {}
+			cd $currentDir
+			if [catch {set contents [eval glob -nocomplain -- $globPatternTotal]} err] {
+				cd $wd
+				error $err
+			}
+			cd $wd
+			foreach item $contents {
+				set item [file join $currentDir $item]
+				lappend newContents $item
+			}
+			set contents $newContents
+			unset newContents
+		}
+		set resultList [concat $resultList $contents]
+
+		# check if iterative dir search is necessary (if specified depth not yet reached):
+		set contents {}
+		set findDirs 1
+		if {([expr $currentDepth + [llength [file split $dirPattern]]] >= $depth) && ($depth > 0)} {set findDirs 0}
+
+		# find dirs at current depth boundary to prime iterative search.
+		# Pre-8.3 glob doesn't support -type or -dir switches; emulate if necessary:
+		if {$83ok && $findDirs} {
+			set contents [glob -nocomplain -directory $currentDir -type d -- $dirPattern]
+		} elseif $findDirs {
+			set wd [pwd]
+			set newContents {}
+			cd $currentDir
+			if [catch {set contents [glob -nocomplain -- $dirPattern/]} err] {
+				cd $wd
+				error $err
+			}
+			cd $wd
+			foreach item $contents {
+				set item [file join $currentDir [string range $item 0 end-1]]
+				lappend newContents $item
+			}
+			set contents $newContents
+			unset newContents
+		}
+
+		# check for redundant links in dir list:
+		set contentLength [llength $contents]
+		set i 0
+		while {$i < $contentLength} {
+			set item [lindex $contents end-$i]
+			incr i
+			
+			# kludge to fully resolve link to native name:
+			set linkValue [file dirname [file normalize [file join $item __dummy__]]]
+
+			# if item is a link, and native name is already in the search space, skip it:
+			if {($linkValue != $item) && (![string first $basedir/ $linkValue/])} {
+				set [namespace current]::REDUNDANCY 1
+				lappend [namespace current]::redundant_files $item
+				continue
+			}
+
+			lappend checkDirs $item			
+		}
+
+		# remove current search dir from search list to prime for next iteration:
+		set checkDirs [lrange $checkDirs 1 end]
+	}	
+	return $resultList
+}
+
+# Tcl pre-8.4 lacks [file normalize] command; emulate it if necessary:
+proc ::fileutil::globfind::file {args} {
+	if {[lindex $args 0] == "normalize"} {
+		set filename [lindex $args 1]
+		set tail [file tail $filename]
+		set filename [::fileutil::fullnormalize [file dirname $filename]]
+		set filename [file join $filename $tail]
+		return $filename
+	} else {
+		return [uplevel ::file $args]
+	}
+}
+
+# Eliminate emulation of [file normalize] if version 8.4 or better:
+if [package vsatisfies [package present Tcl] 8.4] {
+	rename ::fileutil::globfind::file {}
+} else {
+	package require fileutil 1.13
+}
+
+
+# -----------------
+# Following are sample filter commands that can be used with globfind:
+
+# scfind: a command suitable for use as a filtercmd with globfind, arguments
+# duplicate a subset of GNU find args.
+
+proc scfind {args} {
+	set filename [file join [pwd] [lindex $args end]]
+	set switches [lrange $args 0 end-1]
+
+	array set types {
+		f	file
+		d	directory
+		c	characterSpecial
+		b	blockSpecial
+		p	fifo
+		l	link
+		s	socket
+	}
+
+	array set signs {
+		- <
+		+ >
+	}
+
+	array set multiplier {
+		time 86400
+		min   3600
+	}
+	file stat $filename fs
+	set pass 1
+	set switchLength [llength $switches]
+	for {set i 0} {$i < $switchLength} {incr i} {
+		set sw [lindex $switches $i]
+		switch -- $sw {
+			-type {
+				set value [lindex $switches [incr i]]
+				if ![string equal $fs(type) $types($value)] {return 0}
+			}
+			-regex {
+				set value [lindex $switches [incr i]]
+				if ![regexp $value $filename] {return 0}
+			}
+			-size {
+				set value [lindex $switches [incr i]]
+				set sign "=="
+				if [info exists signs([string index $value 0])] {
+					set sign $signs([string index $value 0])
+					set value [string range $value 1 end]
+				}
+				set sizetype [string index $value end]
+				set value [string range $value 0 end-1]
+				if [string equal $sizetype b] {set value [expr $value * 512]}
+				if [string equal $sizetype k] {set value [expr $value * 1024]}
+				if [string equal $sizetype w] {set value [expr $value * 2]}
+
+				if ![expr $fs(size) $sign $value] {return 0}
+			}
+			-atime -
+			-mtime -
+			-ctime -
+			-amin -
+			-mmin -
+			-cmin {
+				set value [lindex $switches [incr i]]
+
+				set sw [string range $sw 1 end]
+				set time "[string index $sw 0]time"
+				set interval [string range $sw 1 end]
+				set sign "=="
+				if [info exists signs([string index $value 0])] {
+					set sign $signs([string index $value 0])
+					set value [string range $value 1 end]
+				}
+				set value [expr [clock seconds] - ($value * $multiplier($interval))]
+				if ![expr $value $sign $fs($time)] {return 0}
+			}
+ 		}
+	}
+	return 1
+}
+
+# find: example use of globfind and scfind to duplicate a subset of the
+# command line interface of GNU find.
+# ex: 
+#	find $env(HOME) -type l -atime +1
+
+proc find {args} {
+	globfind [lindex $args 0] [list [subst "scfind $args"]]
+}
+
+# -----------------
+
+# globsync: sync two locations so that the target looks just like the source:
+
+# If "destructive" is set to 1, files in the target will be deleted if files in equivalent
+# locations in source don't exist.   If 0, files that exist only in target will be left
+# alone, leaving target not an exact duplicate of source.
+
+# if "log" is set to 1, progress messages will be written to stdout.  If 0, not.
+
+# "source" is location to be duplicated.
+# "target" is location to be synced to look like source.
+# file is parameter fed to globsync by globfind.
+
+# ex: globfind ~user_a {globsync 1 1 ~user_a ~user_b}
+
+proc globsync {destructive log source target file} {
+	set source [file normalize $source]
+	set target [file normalize $target]
+	set sourceLength [llength [file split $source]]
+	set targetLength [llength [file split $target]]
+	set targetFile [file normalize [file join $target [join [lrange [file split $file] $sourceLength end] /]]]
+	array set sourceAttr [file attributes $file]
+	file stat $file fs
+	array set sourceAttr "mtime $fs(mtime)"
+	if ![file isdirectory $file] {
+
+		if [file isdirectory $targetFile] {file delete -force -- $targetFile}
+		set err [catch {file copy -force -- $file $targetFile} result]
+		if $err {set err [catch {file mkdir [file dirname $targetFile] ; file copy -force -- $file $targetFile} result]}
+		if $err {errHandle $result}
+		if $log {puts "copied $file to $targetFile"}
+
+		array set targetAttr [file attributes $targetFile]
+		foreach attr [array names sourceAttr] {
+			if {[array get sourceAttr $attr] != [array get targetAttr $attr]} {catch {file attributes $targetFile $attr $sourceAttr($attr)}}
+		}
+		return 0
+	}
+	set err [catch {file mkdir $targetFile} result]
+	if $err {set err [catch {file delete -force -- $targetFile ; file mkdir $targetFile} result]}
+	if $err {errHandle $result}
+	array set targetAttr [file attributes $targetFile]
+	file stat $targetFile fs
+	array set targetAttr "mtime $fs(mtime)"
+	foreach attr [array names sourceAttr] {
+		if {[array get sourceAttr $attr] != [array get targetAttr $attr]} {
+			catch {file attributes $targetFile $attr $sourceAttr($attr)}
+		}
+	}
+	set sourceDirs [glob -dir $file -nocomplain -type d *]
+	if {[lindex [file system $file] 0] != "tclvfs"} {append sourceDirs " [glob -dir $file -nocomplain -type {d hidden} *]"}
+	set targetDirs [glob -dir $targetFile -nocomplain -type d *]
+	if {[lindex [file system $targetFile] 0] != "tclvfs"} {append sourceDirs " [glob -dir $targetFile -nocomplain -type {d hidden} *]"}
+
+	if !$destructive {set targetDirs {}}
+	foreach td $targetDirs {
+		set sd [file join $source [join [lrange [file split $td] $targetLength end] /]]
+		if {[lsearch $sourceDirs $sd] < 0} {	
+			file delete -force -- $td
+			if $log {puts "deleted directory $td"}
+
+		}
+	}
+	set sourceFiles [glob -dir $file -nocomplain -types {b c f l p s} *]
+	if {[lindex [file system $file] 0] != "tclvfs"} {append sourceFiles " [glob -dir $file -nocomplain -types {b c f l p s hidden} *]"}
+		
+	set targetFiles {}
+	if $destructive {
+		set targetFiles [glob -dir $targetFile -nocomplain -types {b c f l p s} *]
+		if {[lindex [file system $targetFile] 0] != "tclvfs"} {append targetFiles " [glob -dir $targetFile -nocomplain -types {b c f l p s hidden} *]"}
+	}
+	foreach tf $targetFiles {
+		set sf [file join $source [join [lrange [file split $tf] $targetLength end] /]]
+		if {[lsearch $sourceFiles $sf] < 0} {
+			file delete -force -- $tf
+			if $log {puts "deleted file $tf"}
+		}	
+	}
+	return 0
+}
+
+proc errHandle {result} {
+	error $result
+}
+
+}
+# end namespace ::fileutil::globfind
-- 
2.23.0