build-aux/msys-to-w32

   1 #!/bin/bash
   2 # Convert a MSYS path list to Windows-native format.
   3 # Status is zero if successful, nonzero otherwise.
   4
   5 # Copyright (C) 2013-2017 Free Software Foundation, Inc.
   6
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 # Take only the basename from the full pathname
  21 me=${0//*\//}
  22
  23 usage="usage: ${me} PATHLIST"
  24
  25 help="$usage
  26   or:  ${me} OPTION
  27
  28 Convert a MSYS path list to Windows-native format.
  29
  30 PATHLIST should be a colon-separated list of MSYS paths, which will be
  31 written to the standard output after performing these transformations:
  32
  33 1. Discard empty paths.
  34 2. Replace: '\' with '/', '//' with '/' and ':' with ';'.
  35 3. Translate absolute paths to Windows-native format.
  36
  37 Options:
  38   --help     display this help and exit
  39
  40 Report bugs to <bug-gnu-emacs@gnu.org>."
  41
  42 for arg
  43 do
  44   case $arg in
  45     --help | --hel | --he | --h)
  46       exec echo "$help" ;;
  47     --)
  48       shift
  49       break ;;
  50     -*)
  51       echo "${me}: invalid option: $arg" >&2
  52       exit 1 ;;
  53     *)
  54       break ;;
  55   esac
  56 done
  57
  58 [ $# -eq 1 ] || {
  59     echo "${me}: $usage" >&2
  60     exit 1
  61 }
  62
  63 w32pathlist=""
  64
  65 # Put each MSYS path in one positional parameter and iterate through
  66 # them
  67 IFS=:
  68 set -- $1
  69
  70 for p
  71 do
  72     [ -z "$p" ] && continue
  73
  74     if [ "${p:0:1}" != "/" ]
  75     then
  76         w32p=$p
  77     elif [ -d "$p" ]
  78     then
  79         w32p=$(cd "$p" && pwd -W)
  80     else
  81         # Make some cleanup in the path and look for its deepest
  82         # existing directory
  83
  84         p=${p//\\//}
  85         p=${p//\/\///}
  86         p=${p%/}
  87
  88         p1=$p
  89         while :
  90         do
  91             p1=${p1%/*}
  92             [ -z "$p1" ] && p1="/" && break
  93             [ -d "$p1" ] && break
  94         done
  95
  96         # translate the existing part and append the rest
  97         w32p=$(cd "${p1}" && pwd -W)
  98         remainder=${p#$p1}
  99         w32p=${w32p%/}/${remainder#/}
 100     fi
 101
 102     w32pathlist="${w32pathlist};${w32p}"
 103
 104 done
 105
 106 echo "${w32pathlist:1}"