tools/patch

   1 #!/bin/bash
   2 # Script that automatically applies patches.
   3
   4 paths=
   5 patches=
   6
   7 while [ $# -gt 0 ]; do
   8         case "${1}" in
   9                 --search-path=*)
  10                         paths="${paths} ${1#--search-path=}"
  11                         ;;
  12                 *)
  13                         patches="${patches} ${1}"
  14                         ;;
  15         esac
  16         shift
  17 done
  18
  19 if [ -n "${patches}" ]; then
  20         echo "Applying patches..."
  21 fi
  22
  23 # Apply all patches given on command line.
  24 for patch in ${patches}; do
  25         case "${patch}" in
  26                 /*)
  27                         ;;
  28                 *)
  29                         for path in ${paths}; do
  30                                 if [ -e "${path}/${patch}" ]; then
  31                                         patch="${path}/${patch}"
  32                                         break
  33                                 fi
  34                         done
  35                         ;;
  36         esac
  37
  38         # Check if patch file does exist.
  39         if ! [ -e "${patch}" ]; then
  40                 echo >&2 "  ERROR: Patch file does not exist: ${patch}"
  41                 exit 1
  42         fi
  43
  44         # Options applied to patch command.
  45         options="-N"
  46
  47         # Get right -p1 option.
  48         case "${patch}" in
  49                 *.patch[0-9]|*.patch[0-9]R)
  50                         _patch="${patch}"
  51                         # Get patch level from file name.
  52                         while [ ${#_patch} -gt 0 ]; do
  53                                 last_pos=$(( ${#_patch} - 1 ))
  54                                 last_char=${_patch:${last_pos}}
  55                                 _patch=${_patch:0:${last_pos}}
  56
  57                                 case "${last_char}" in
  58                                         [0-9])
  59                                                 options="${options} -p${last_char}"
  60                                                 break
  61                                                 ;;
  62                                         R)
  63                                                 options="${options} -R"
  64                                                 ;;
  65                                 esac
  66                         done
  67                         ;;
  68                 *.patch|*.diff)
  69                         # Default is -p1.
  70                         options="${options} -p1"
  71                         ;;
  72                 *)
  73                         echo >&2 "   WARNING: Ignoring unknown file: ${patch}"
  74                         continue
  75                         ;;
  76         esac
  77
  78         echo "  Applying ${patch} (${options})..."
  79         patch ${options} -i ${patch} || exit $?
  80 done
  81
  82 exit 0