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 # scripts in the 'embed' directory are treated as fake applets
  21 custom_scripts()
  22 {
  23         custom_loc="$1"
  24         if [ -d "$custom_loc" ]
  25         then
  26                 for i in $(cd "$custom_loc"; ls * 2>/dev/null)
  27                 do
  28                         printf "IF_FEATURE_SH_EMBEDDED_SCRIPTS(APPLET_SCRIPTED(%s, scripted, BB_DIR_USR_BIN, BB_SUID_DROP, scripted))\n" $i;
  29                 done
  30         fi
  31 }
  32
  33 generate()
  34 {
  35         # NB: data to be inserted at INSERT line is coming on stdin
  36         src="$1"
  37         dst="$2"
  38         header="$3"
  39         loc="$4"
  40         #chk "${dst}"
  41         {
  42                 # Need to use printf: different shells have inconsistent
  43                 # rules re handling of "\n" in echo params.
  44                 printf "%s\n" "${header}"
  45                 # print everything up to INSERT line
  46                 sed -n '/^INSERT$/ q; p' "${src}"
  47                 # copy stdin to stdout
  48                 cat
  49                 if [ -n "$loc" ]
  50                 then
  51                         custom_scripts "$loc"
  52                 fi
  53                 # print everything after INSERT line
  54                 sed -n '/^INSERT$/ {
  55                 :l
  56                     n
  57                     p
  58                     bl
  59                 }' "${src}"
  60         } >"${dst}.tmp"
  61         if ! cmp -s "${dst}" "${dst}.tmp"; then
  62                 gen "${dst}"
  63                 mv "${dst}.tmp" "${dst}"
  64         else
  65                 rm -f "${dst}.tmp"
  66         fi
  67 }
  68
  69 # (Re)generate include/applets.h
  70 sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
  71 | generate \
  72         "$srctree/include/applets.src.h" \
  73         "include/applets.h" \
  74         "/* DO NOT EDIT. This file is generated from applets.src.h */" \
  75         "$srctree/embed"
  76
  77 # (Re)generate include/usage.h
  78 # We add line continuation backslash after each line,
  79 # and insert empty line before each line which doesn't start
  80 # with space or tab
  81 TAB="$(printf '\tX')"
  82 TAB="${TAB%X}"
  83 LF="$(printf '\nX')"
  84 LF="${LF%X}"
  85 sed -n -e 's@^//usage:\([ '"$TAB"'].*\)$@\1 \\@p' \
  86        -e 's@^//usage:\([^ '"$TAB"'].*\)$@\'"$LF"'\1 \\@p' \
  87         "$srctree"/*/*.c "$srctree"/*/*/*.c \
  88 | generate \
  89         "$srctree/include/usage.src.h" \
  90         "include/usage.h" \
  91         "/* DO NOT EDIT. This file is generated from usage.src.h */"
  92
  93 # (Re)generate */Kbuild and */Config.in
  94 # We skip .dotdirs - makes git/svn/etc users happier
  95 { cd -- "$srctree" && find . -type d ! '(' -name '.?*' -prune ')'; } \
  96 | while read -r d; do
  97         d="${d#./}"
  98
  99         src="$srctree/$d/Kbuild.src"
 100         dst="$d/Kbuild"
 101         if test -f "$src"; then
 102                 mkdir -p -- "$d" 2>/dev/null
 103
 104                 sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
 105                 | generate \
 106                         "${src}" "${dst}" \
 107                         "# DO NOT EDIT. This file is generated from Kbuild.src"
 108         fi
 109
 110         src="$srctree/$d/Config.src"
 111         dst="$d/Config.in"
 112         if test -f "$src"; then
 113                 mkdir -p -- "$d" 2>/dev/null
 114
 115                 sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
 116                 | generate \
 117                         "${src}" "${dst}" \
 118                         "# DO NOT EDIT. This file is generated from Config.src"
 119         fi
 120 done
 121
 122 # Last read failed. This is normal. Don't exit with its error code:
 123 exit 0