LXR busybox/scripts/gen_build

   1#!/bin/sh
   2
   3# Note: was using sed OPTS CMD -- FILES
   4# but users complain that many sed implementations
   5# are misinterpreting --.
   6
   7test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   8
   9# cd to objtree
  10cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
  11# In separate objtree build, include/ might not exist yet
  12mkdir include 2>/dev/null
  13
  14srctree="$1"
  15
  16status() { printf '  %-8s%s\n' "$1" "$2"; }
  17gen() { status "GEN" "$@"; }
  18chk() { status "CHK" "$@"; }
  19
  20# scripts in the 'embed' directory are treated as fake applets
  21custom_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
  33generate()
  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
  70sed -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
  81TAB="$(printf '\tX')"
  82TAB="${TAB%X}"
  83LF="$(printf '\nX')"
  84LF="${LF%X}"
  85sed -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
 120done
 121
 122# Last read failed. This is normal. Don't exit with its error code:
 123exit 0
 124