TABLE OF CONTENTS

::pwtk::xxxdir_backup_

SYNOPSIS

proc ::pwtk::xxxdir_backup_ {dir postfix} {

PURPOSE

Actual implementation of ::pwtk::outdir_backup & ::pwtk::wfcdir_backup

SOURCE

    set xxxdir [file normalize [${dir}_query -hard]]; # N.B. if outdir/wfcdir is undefined, [${dir}_query -hard] returns "."

    if { ! [file exists $xxxdir] } {
        ::pwtk::error "$dir directory \"$xxxdir\" does not exist" 1
    }

    if { $xxxdir eq "." } { set xxxdir [pwd] }
    set backup  $xxxdir.$postfix

    # get a unique name
    set i ""
    while { [file exists ${backup}$i] } {
        if { $i eq "" } { set i 0 }
        incr i
    }
    set backup ${backup}$i

    print "Making a backup copy of '$dir':\n- $dir     :  $xxxdir\n- backup copy:  $backup\n"

    try {
        file copy -force -- $xxxdir $backup
    } on error err {
        # this happens in the following cases:
        # 1. when the user does not have the permission to create $backup dir
        # 2. when the $xxxdir create files that the user does not have permission to copy
        # ...
        #
        # in such cases, return $xxxdir

        uplevel 1 [list ::pwtk::error "failed to make a backup copy of $dir\n\n$err"]
        return $xxxdir
    }
    return $backup
}