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 status() { printf '  %-8s%s\n' "$1" "$2"; }
  13 gen() { status "GEN" "$@"; }
  14 chk() { status "CHK" "$@"; }
  15
  16 generate()
  17 {
  18         local src="$1" dst="$2" header="$3" insert="$4"
  19         #chk "${dst}"
  20         (
  21                 echo "${header}"
  22                 if grep -qs '^INSERT$' "${src}"; then
  23                         sed -n '1,/^INSERT$/p' "${src}"
  24                         echo "${insert}"
  25                         sed -n '/^INSERT$/,$p' "${src}"
  26                 else
  27                         if [ -n "${insert}" ]; then
  28                                 echo "ERROR: INSERT line missing in: ${src}" 1>&2
  29                         fi
  30                         cat "${src}"
  31                 fi
  32         ) | sed '/^INSERT$/d' > "${dst}.tmp"
  33         if ! cmp -s "${dst}" "${dst}.tmp"; then
  34                 gen "${dst}"
  35                 mv "${dst}.tmp" "${dst}"
  36         else
  37                 rm -f "${dst}.tmp"
  38         fi
  39 }
  40
  41 # (Re)generate include/applets.h
  42 s=`sed -n 's@^//applet:@@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  43 generate \
  44         "$srctree/include/applets.src.h" \
  45         "include/applets.h" \
  46         "/* DO NOT EDIT. This file is generated from applets.src.h */" \
  47         "${s}"
  48
  49 # (Re)generate include/usage.h
  50 # We add line continuation backslash after each line,
  51 # and insert empty line before each line which doesn't start
  52 # with space or tab
  53 # (note: we need to use \\\\ because of ``)
  54 s=`sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\\\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\\\@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  55 generate \
  56         "$srctree/include/usage.src.h" \
  57         "include/usage.h" \
  58         "/* DO NOT EDIT. This file is generated from usage.src.h */" \
  59         "${s}"
  60
  61 # (Re)generate */Kbuild and */Config.in
  62 { cd -- "$srctree" && find . -type d; } | while read -r d; do
  63         d="${d#./}"
  64
  65         src="$srctree/$d/Kbuild.src"
  66         dst="$d/Kbuild"
  67         if test -f "$src"; then
  68                 mkdir -p -- "$d" 2>/dev/null
  69
  70                 s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  71                 generate \
  72                         "${src}" "${dst}" \
  73                         "# DO NOT EDIT. This file is generated from Kbuild.src" \
  74                         "${s}"
  75         fi
  76
  77         src="$srctree/$d/Config.src"
  78         dst="$d/Config.in"
  79         if test -f "$src"; then
  80                 mkdir -p -- "$d" 2>/dev/null
  81
  82                 s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  83                 generate \
  84                         "${src}" "${dst}" \
  85                         "# DO NOT EDIT. This file is generated from Config.src" \
  86                         "${s}"
  87         fi
  88 done
  89
  90 exit 0