#!/bin/perl

#

# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

# Crunch down the input(s) to Windows short (mangled) form.

# Any elements not actually found in the filesystem will be dropped.

#

# This script needs three modes:

#   1) DOS mode with drive letter followed by : and ; path separator

#   2) Cygwin mode with /cygdrive/<drive letter>/ and : path separator

#   3) MinGW/MSYS mode with /<drive letter>/ and : path separator

use strict;

use warnings;

use Getopt::Std;

sub Usage() {

    print ("Usage:\n $0 -d | -c | -m \<PATH\>\n");

    print ("            -d DOS style (drive letter, :, and ; path separator)\n");

    print ("            -c Cywgin style (/cygdrive/drive/ and : path separator)\n");

    print ("            -m MinGW style (/drive/ and : path separator)\n");

    exit 1;

}

# Process command line options:

my %opts;

getopts('dcm', \%opts) || Usage();

if (scalar(@ARGV) != 1) {Usage()};

# Translate drive letters such as C:/

#   if MSDOS, Win32::GetShortPathName() does the work (see below).

#   if Cygwin, use the /cygdrive/c/ form.

#   if MinGW, use the /c/ form.

my $path0;

my $sep2;

if (defined ($opts{'d'})) {

    #MSDOS

    $path0 = '';

    $sep2 = ';';

} elsif (defined ($opts{'c'})) {

    #Cygwin

    $path0 = '/cygdrive';

    $sep2 = ':';

} elsif (defined ($opts{'m'})) {

    #MinGW/MSYS

    $path0 = '';

    $sep2 = ':';

} else {

    Usage();

}

my $input = $ARGV[0];

my $sep1;

# Is the input ';' separated, or ':' separated, or a simple string?

if (($input =~ tr/;/;/) > 0) {

    # One or more ';' implies Windows style path.

    $sep1 = ';';

} elsif (($input =~ tr/:/:/) > 1) {

    # Two or more ':' implies Cygwin or MinGW/MSYS style path.

    $sep1 = ':';

} else {

    # Otherwise, this is not a path - take up to the end of string in

    # one piece.

    $sep1 = '/$/';

}

# Split the input on $sep1 PATH separator and process the pieces.

my @pieces;

for (split($sep1, $input)) {

    my $try = $_;

    if (($try =~ /^\/cygdrive\/(.)\/(.*)$/) || ($try =~ /^\/(.)\/(.*)$/)) {

        # Special case #1: This is a Cygwin /cygrive/<drive letter/ path.

        # Special case #2: This is a MinGW/MSYS /<drive letter/ path.

        $try = $1.':/'.$2;

    } elsif ($try =~ /^\/(.*)$/) {

        # Special case #3: check for a Cygwin or MinGW/MSYS form with a

        # leading '/' for example '/usr/bin/bash'.

        # Look up where this is mounted and rebuild the

        # $try string with that information

        my $cmd = "df --portability --all --human-readable $try";

        my $line = qx ($cmd);

        my $status = $?; 

        if ($status == 0) {

            my @lines = split ('\n', $line);

            my ($device, $junk, $mountpoint);

            # $lines[0] is the df header.

            # Example string for split - we want the first and last elements:

            # C:\jprt\products\P1\MinGW\msys\1.0  200G   78G  123G  39% /usr

            ($device, $junk, $junk, $junk, $junk, $mountpoint) = split (/\s+/, $lines[1]);

            # Replace $mountpoint with $device/ in the original string

            $try =~ s|$mountpoint|$device/|;

        } else {

            printf ("Error %d from command %s\n%s\n", $status, $cmd, $line);

        }

    }

    my $str = Win32::GetShortPathName($try);

    if (!defined($str)){

        # Special case #4: If the lookup did not work, loop through

        # adding extensions listed in PATHEXT, looking for the first

        # match.

        for (split(';', $ENV{'PATHEXT'})) {

            $str = Win32::GetShortPathName($try.$_);

            if (defined($str)) {

                last;

            }

        }

    }

    if (defined($str)){

        if (!defined($opts{'d'})) {

            # If not MSDOS, change C: to [/cygdrive]/c/

            if ($str =~ /^(\S):(.*)$/) {

                my $path1 = $1;

                my $path2 = $2;

                $str = $path0 . '/' . $path1 . '/' . $path2;

            }

        }

        push (@pieces, $str);

    }

}

# If input was a PATH, join the pieces back together with $sep2 path

# separator.

my $result;

if (scalar(@pieces > 1)) {

    $result = join ($sep2, @pieces);

} else {

    $result = $pieces[0];

}

if (defined ($result)) {

    # Change all '\' to '/'

    $result =~ s/\\/\//g;

    # Remove duplicate '/'

    $result =~ s/\/\//\//g;

    # Map to lower case

    $result =~ tr/A-Z/a-z/;

    print ("$result\n");

}