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proc cat fname {
    set fname [open $fname r]
    set data [read $fname]
    close $fname
    return $data
}

proc pkgIndexDir {root fout d1} {

    puts [format {%*sIndexing %s} [expr {4 * [info level]}] {} \
	      [file tail $d1]]
    set idx [string length $root]
    foreach ftail [glob -directory $d1 -nocomplain -tails *] {
        set f [file join $d1 $ftail]
        if {[file isdirectory $f] && [string compare CVS $ftail]} {
            pkgIndexDir $root $fout $f
        } elseif {[file tail $f] eq "pkgIndex.tcl"} {
      	    puts $fout "set dir \${VFSROOT}[string range $d1 $idx end]"
	          puts $fout [cat $f]
	      }
    }
}

###
# Script to build the VFS file system
###
proc copyDir {d1 d2} {

    puts [format {%*sCreating %s} [expr {4 * [info level]}] {} \
	      [file tail $d2]]

    file delete -force -- $d2
    file mkdir $d2

    foreach ftail [glob -directory $d1 -nocomplain -tails *] {
        set f [file join $d1 $ftail]
        if {[file isdirectory $f] && [string compare CVS $ftail]} {
            copyDir $f [file join $d2 $ftail]
        } elseif {[file isfile $f]} {
      	    file copy -force $f [file join $d2 $ftail]
	          if {$::tcl_platform(platform) eq {unix}} {
            		file attributes [file join $d2 $ftail] -permissions 0644
      	    } else {
            		file attributes [file join $d2 $ftail] -readonly 1
	          }
	      }
    }

    if {$::tcl_platform(platform) eq {unix}} {
      	file attributes $d2 -permissions 0755
    } else {
	      file attributes $d2 -readonly 1
    }
}

if {[llength $argv] < 3} {
    puts "Usage: VFS_ROOT TCLSRC_ROOT PLATFORM"
    exit 1
}
set TCL_SCRIPT_DIR [lindex $argv 0]
set TCLSRC_ROOT    [lindex $argv 1]
set PLATFORM       [lindex $argv 2]
set TKDLL          [lindex $argv 3]
set TKVER          [lindex $argv 4]

puts "Building [file tail $TCL_SCRIPT_DIR] for $PLATFORM"
copyDir ${TCLSRC_ROOT}/library ${TCL_SCRIPT_DIR}

if {$PLATFORM == "windows"} {
    set ddedll [glob -nocomplain ${TCLSRC_ROOT}/win/tcldde*.dll]
    puts "DDE DLL $ddedll"
    if {$ddedll != {}} {
      	file copy $ddedll ${TCL_SCRIPT_DIR}/dde
    }
    set regdll [glob -nocomplain ${TCLSRC_ROOT}/win/tclreg*.dll]
    puts "REG DLL $ddedll"
    if {$regdll != {}} {
      	file copy $regdll ${TCL_SCRIPT_DIR}/reg
    }
} else {
    # Remove the dde and reg package paths
    file delete -force ${TCL_SCRIPT_DIR}/dde
    file delete -force ${TCL_SCRIPT_DIR}/reg
}

# For the following packages, cat their pkgIndex files to tclIndex
file attributes ${TCL_SCRIPT_DIR}/tclIndex -readonly 0
set fout [open ${TCL_SCRIPT_DIR}/tclIndex a]
puts $fout {#
# MANIFEST OF INCLUDED PACKAGES
#
set VFSROOT $dir
}
if {$TKDLL ne {} && [file exists $TKDLL]} {
  file copy $TKDLL ${TCL_SCRIPT_DIR}
  puts $fout [list package ifneeded Tk $TKVER "load \$dir $TKDLL"]
}
pkgIndexDir ${TCL_SCRIPT_DIR} $fout ${TCL_SCRIPT_DIR}
close $fout