release/src/router/busybox/scripts/gen_build_files.sh

   1 #!/bin/sh
   2
   3 # Note: was using sed OPTS CMD -- FILES
   4 # but users complain that many sed implementations
   5 # are misinterpreting --.
   6
   7 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   8
   9 # cd to objtree
  10 cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
  11 # In separate objtree build, include/ might not exist yet
  12 mkdir include 2>/dev/null
  13
  14 srctree="$1"
  15
  16 status() { printf '  %-8s%s\n' "$1" "$2"; }
  17 gen() { status "GEN" "$@"; }
  18 chk() { status "CHK" "$@"; }
  19
  20 generate()
  21 {
  22         # NB: data to be inserted at INSERT line is coming on stdin
  23         local src="$1" dst="$2" header="$3"
  24         #chk "${dst}"
  25         {
  26                 # Need to use printf: different shells have inconsistent
  27                 # rules re handling of "\n" in echo params.
  28                 printf "%s\n" "${header}"
  29                 # print everything up to INSERT line
  30                 sed -n '/^INSERT$/ q; p' "${src}"
  31                 # copy stdin to stdout
  32                 cat
  33                 # print everything after INSERT line
  34                 sed -n '/^INSERT$/ { :l; n; p; bl }' "${src}"
  35         } >"${dst}.tmp"
  36         if ! cmp -s "${dst}" "${dst}.tmp"; then
  37                 gen "${dst}"
  38                 mv "${dst}.tmp" "${dst}"
  39         else
  40                 rm -f "${dst}.tmp"
  41         fi
  42 }
  43
  44 # (Re)generate include/applets.h
  45 sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
  46 | generate \
  47         "$srctree/include/applets.src.h" \
  48         "include/applets.h" \
  49         "/* DO NOT EDIT. This file is generated from applets.src.h */"
  50
  51 # (Re)generate include/usage.h
  52 # We add line continuation backslash after each line,
  53 # and insert empty line before each line which doesn't start
  54 # with space or tab
  55 sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\@p' \
  56         "$srctree"/*/*.c "$srctree"/*/*/*.c \
  57 | generate \
  58         "$srctree/include/usage.src.h" \
  59         "include/usage.h" \
  60         "/* DO NOT EDIT. This file is generated from usage.src.h */"
  61
  62 # (Re)generate */Kbuild and */Config.in
  63 # We skip .dotdirs - makes git/svn/etc users happier
  64 { cd -- "$srctree" && find . -type d -not '(' -name '.?*' -prune ')'; } \
  65 | while read -r d; do
  66         d="${d#./}"
  67
  68         src="$srctree/$d/Kbuild.src"
  69         dst="$d/Kbuild"
  70         if test -f "$src"; then
  71                 mkdir -p -- "$d" 2>/dev/null
  72
  73                 sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
  74                 | generate \
  75                         "${src}" "${dst}" \
  76                         "# DO NOT EDIT. This file is generated from Kbuild.src"
  77         fi
  78
  79         src="$srctree/$d/Config.src"
  80         dst="$d/Config.in"
  81         if test -f "$src"; then
  82                 mkdir -p -- "$d" 2>/dev/null
  83
  84                 sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
  85                 | generate \
  86                         "${src}" "${dst}" \
  87                         "# DO NOT EDIT. This file is generated from Config.src"
  88         fi
  89 done
  90
  91 # Last read failed. This is normal. Don't exit with its error code:
  92 exit 0