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) 2013-2014 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 each path to Windows-native format.
  36
  37 Relative paths or paths starting with '%emacs_dir%' will be passed
  38 verbatim to the standard output.
  39
  40 Each non existing absolute path will be translated by looking for its
  41 deepest existing directory, which will be translated and the remainder
  42 appended.
  43
  44 Options:
  45   --help     display this help and exit
  46
  47 Report bugs to <bug-gnu-emacs@gnu.org>."
  48
  49 for arg
  50 do
  51   case $arg in
  52     --help | --hel | --he | --h)
  53       exec echo "$help" ;;
  54     --)
  55       shift
  56       break ;;
  57     -*)
  58       echo "${me}: invalid option: $arg" >&2
  59       exit 1 ;;
  60     *)
  61       break ;;
  62   esac
  63 done
  64
  65 [ $# -eq 1 ] || {
  66     echo "${me}: $usage" >&2
  67     exit 1
  68 }
  69
  70 w32pathlist=""
  71
  72 # Put each MSYS path in one positional parameter and iterate through
  73 # them
  74 IFS=:
  75 set -- $1
  76
  77 for p
  78 do
  79     [ -z "$p" ] && continue
  80
  81     if [ "${p:0:11}" = "%emacs_dir%" ]
  82     then
  83         w32p=$p
  84     elif [ "${p:0:1}" != "/" ]
  85     then
  86         w32p=$p
  87     elif [ -d "$p" ]
  88     then
  89         w32p=$(cd "$p" && pwd -W)
  90     else
  91         # Make some cleanup in the path and look for its deepest
  92         # existing directory
  93
  94         p=${p//\\//}
  95         p=${p//\/\///}
  96         p=${p%/}
  97
  98         p1=$p
  99         while :
 100         do
 101             p1=${p1%/*}
 102             [ -z "$p1" ] && p1="/" && break
 103             [ -d "$p1" ] && break
 104         done
 105
 106         # translate the existing part and append the rest
 107         w32p=$(cd "${p1}" && pwd -W)
 108         remainder=${p#$p1}
 109         w32p+=/${remainder#/}
 110     fi
 111
 112     w32pathlist="${w32pathlist};${w32p}"
 113
 114 done
 115
 116 echo "${w32pathlist:1}"