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 # In separate objtree build, include/ might not exist yet
   8 mkdir include 2>/dev/null
   9
  10 srctree="$1"
  11
  12 # (Re)generate include/applets.h
  13 src="$srctree/include/applets.src.h"
  14 dst="include/applets.h"
  15 s=`sed -n 's@^//applet:@@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  16 old=`cat "$dst" 2>/dev/null`
  17 # Why "IFS='' read -r REPLY"??
  18 # This atrocity is needed to read lines without mangling.
  19 # IFS='' prevents whitespace trimming,
  20 # -r suppresses backslash handling.
  21 new=`echo "/* DO NOT EDIT. This file is generated from applets.src.h */"
  22 while IFS='' read -r REPLY; do
  23         test x"$REPLY" = x"INSERT" && REPLY="$s"
  24         printf "%s\n" "$REPLY"
  25 done <"$src"`
  26 if test x"$new" != x"$old"; then
  27         echo "  GEN     $dst"
  28         printf "%s\n" "$new" >"$dst"
  29 fi
  30
  31 # (Re)generate include/usage.h
  32 src="$srctree/include/usage.src.h"
  33 dst="include/usage.h"
  34 # We add line continuation backslash after each line,
  35 # and insert empty line before each line which doesn't start
  36 # with space or tab
  37 # (note: we need to use \\\\ because of ``)
  38 s=`sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\\\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\\\@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  39 old=`cat "$dst" 2>/dev/null`
  40 new=`echo "/* DO NOT EDIT. This file is generated from usage.src.h */"
  41 while IFS='' read -r REPLY; do
  42         test x"$REPLY" = x"INSERT" && REPLY="$s"
  43         printf "%s\n" "$REPLY"
  44 done <"$src"`
  45 if test x"$new" != x"$old"; then
  46         echo "  GEN     $dst"
  47         printf "%s\n" "$new" >"$dst"
  48 fi
  49
  50 # (Re)generate */Kbuild and */Config.in
  51 { cd -- "$srctree" && find . -type d; } | while read -r d; do
  52         d="${d#./}"
  53
  54         src="$srctree/$d/Kbuild.src"
  55         dst="$d/Kbuild"
  56         if test -f "$src"; then
  57                 mkdir -p -- "$d" 2>/dev/null
  58                 #echo "  CHK     $dst"
  59
  60                 s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  61
  62                 old=`cat "$dst" 2>/dev/null`
  63                 new=`echo "# DO NOT EDIT. This file is generated from Kbuild.src"
  64                 while IFS='' read -r REPLY; do
  65                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  66                         printf "%s\n" "$REPLY"
  67                 done <"$src"`
  68                 if test x"$new" != x"$old"; then
  69                         echo "  GEN     $dst"
  70                         printf "%s\n" "$new" >"$dst"
  71                 fi
  72         fi
  73
  74         src="$srctree/$d/Config.src"
  75         dst="$d/Config.in"
  76         if test -f "$src"; then
  77                 mkdir -p -- "$d" 2>/dev/null
  78                 #echo "  CHK     $dst"
  79
  80                 s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  81
  82                 old=`cat "$dst" 2>/dev/null`
  83                 new=`echo "# DO NOT EDIT. This file is generated from Config.src"
  84                 while IFS='' read -r REPLY; do
  85                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  86                         printf "%s\n" "$REPLY"
  87                 done <"$src"`
  88                 if test x"$new" != x"$old"; then
  89                         echo "  GEN     $dst"
  90                         printf "%s\n" "$new" >"$dst"
  91                 fi
  92         fi
  93 done
  94
  95 # Last read failed. This is normal. Don't exit with its error code:
  96 exit 0