scripts/gen_build_files.sh

   1 #!/bin/sh
   2
   3 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   4
   5 # cd to objtree
   6 cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   7
   8 srctree="$1"
   9
  10 # (Re)generate include/applets.h
  11 src="$srctree/include/applets.src.h"
  12 dst="include/applets.h"
  13 s=`sed -n 's@^//applet:@@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  14 old=`cat "$dst" 2>/dev/null`
  15 # Why "IFS='' read -r REPLY"??
  16 # This atrocity is needed to read lines without mangling.
  17 # IFS='' prevents whitespace trimming,
  18 # -r suppresses backslash handling.
  19 new=`echo "/* DO NOT EDIT. This file is generated from applets.src.h */"
  20 while IFS='' read -r REPLY; do
  21         test x"$REPLY" = x"INSERT" && REPLY="$s"
  22         printf "%s\n" "$REPLY"
  23 done <"$src"`
  24 if test x"$new" != x"$old"; then
  25         echo "  GEN     $dst"
  26         printf "%s\n" "$new" >"$dst"
  27 fi
  28
  29 # (Re)generate include/usage.h
  30 src="$srctree/include/usage.src.h"
  31 dst="include/usage.h"
  32 # We add line continuation backslash after each line,
  33 # and insert empty line before each line which doesn't start
  34 # with space or tab
  35 # (note: we need to use \\\\ because of ``)
  36 s=`sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\\\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\\\@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  37 old=`cat "$dst" 2>/dev/null`
  38 new=`echo "/* DO NOT EDIT. This file is generated from usage.src.h */"
  39 while IFS='' read -r REPLY; do
  40         test x"$REPLY" = x"INSERT" && REPLY="$s"
  41         printf "%s\n" "$REPLY"
  42 done <"$src"`
  43 if test x"$new" != x"$old"; then
  44         echo "  GEN     $dst"
  45         printf "%s\n" "$new" >"$dst"
  46 fi
  47
  48 # (Re)generate */Kbuild and */Config.in
  49 find -type d | while read -r d; do
  50         d="${d#./}"
  51         src="$srctree/$d/Kbuild.src"
  52         dst="$d/Kbuild"
  53         if test -f "$src"; then
  54                 #echo "  CHK     $dst"
  55
  56                 s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  57
  58                 old=`cat "$dst" 2>/dev/null`
  59                 new=`echo "# DO NOT EDIT. This file is generated from Kbuild.src"
  60                 while IFS='' read -r REPLY; do
  61                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  62                         printf "%s\n" "$REPLY"
  63                 done <"$src"`
  64                 if test x"$new" != x"$old"; then
  65                         echo "  GEN     $dst"
  66                         printf "%s\n" "$new" >"$dst"
  67                 fi
  68         fi
  69
  70         src="$srctree/$d/Config.src"
  71         dst="$d/Config.in"
  72         if test -f "$src"; then
  73                 #echo "  CHK     $dst"
  74
  75                 s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  76
  77                 old=`cat "$dst" 2>/dev/null`
  78                 new=`echo "# DO NOT EDIT. This file is generated from Config.src"
  79                 while IFS='' read -r REPLY; do
  80                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  81                         printf "%s\n" "$REPLY"
  82                 done <"$src"`
  83                 if test x"$new" != x"$old"; then
  84                         echo "  GEN     $dst"
  85                         printf "%s\n" "$new" >"$dst"
  86                 fi
  87         fi
  88 done
  89
  90 # Last read failed. This is normal. Don't exit with its error code:
  91 exit 0