scripts/gen_build_files.sh

   1 #!/bin/bash
   2 # bashism:
   3 # "read -r" without variable name reads line into $REPLY
   4 # without stripping whitespace.
   5
   6 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   7
   8 # cd to objtree
   9 cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
  10
  11 srctree="$1"
  12
  13 find -type d | while read -r d; do
  14         src="$srctree/$d/Kbuild.src"
  15         dst="$d/Kbuild"
  16         if test -f "$src"; then
  17                 echo "  CHK     $dst"
  18
  19                 s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  20                 echo "# DO NOT EDIT. This file is generated from Kbuild.src" >"$dst.$$.tmp"
  21                 while read -r; do
  22                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  23                         printf "%s\n" "$REPLY"
  24                 done <"$src" >>"$dst.$$.tmp"
  25
  26                 if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
  27                         rm -- "$dst.$$.tmp"
  28                 else
  29                         echo "  GEN     $dst"
  30                         mv -- "$dst.$$.tmp" "$dst"
  31                 fi
  32         fi
  33
  34         src="$srctree/$d/Config.src"
  35         dst="$d/Config.in"
  36         if test -f "$src"; then
  37                 echo "  CHK     $dst"
  38
  39                 s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  40                 echo "# DO NOT EDIT. This file is generated from Config.src" >"$dst.$$.tmp"
  41                 while read -r; do
  42                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  43                         printf "%s\n" "$REPLY"
  44                 done <"$src" >>"$dst.$$.tmp"
  45
  46                 if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
  47                         rm -- "$dst.$$.tmp"
  48                 else
  49                         echo "  GEN     $dst"
  50                         mv -- "$dst.$$.tmp" "$dst"
  51                 fi
  52         fi
  53 done
  54
  55 # Last read failed. This is normal. Don't exit with its error code:
  56 exit 0