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
   7export LC_ALL=C
   8
   9test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
  10
  11# cd to objtree
  12cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
  13# In separate objtree build, include/ might not exist yet
  14mkdir include 2>/dev/null
  15
  16srctree="$1"
  17
  18status() { printf '  %-8s%s\n' "$1" "$2"; }
  19gen() { status "GEN" "$@"; }
  20chk() { status "CHK" "$@"; }
  21
  22# scripts in the 'embed' directory are treated as fake applets
  23custom_scripts()
  24{
  25        custom_loc="$1"
  26        if [ -d "$custom_loc" ]
  27        then
  28                for i in $(cd "$custom_loc"; ls * 2>/dev/null)
  29                do
  30                        printf "IF_FEATURE_SH_EMBEDDED_SCRIPTS(APPLET_SCRIPTED(%s, scripted, BB_DIR_USR_BIN, BB_SUID_DROP, scripted))\n" $i;
  31                done
  32        fi
  33}
  34
  35generate()
  36{
  37        # NB: data to be inserted at INSERT line is coming on stdin
  38        src="$1"
  39        dst="$2"
  40        header="$3"
  41        loc="$4"
  42        #chk "${dst}"
  43        {
  44                # Need to use printf: different shells have inconsistent
  45                # rules re handling of "\n" in echo params.
  46                printf "%s\n" "${header}"
  47                # print everything up to INSERT line
  48                sed -n '/^INSERT$/ q; p' "${src}"
  49                # copy stdin to stdout
  50                cat
  51                if [ -n "$loc" ]
  52                then
  53                        custom_scripts "$loc"
  54                fi
  55                # print everything after INSERT line
  56                sed -n '/^INSERT$/ {
  57                :l
  58                    n
  59                    p
  60                    bl
  61                }' "${src}"
  62        } >"${dst}.tmp"
  63        if ! cmp -s "${dst}" "${dst}.tmp"; then
  64                gen "${dst}"
  65                mv "${dst}.tmp" "${dst}"
  66        else
  67                rm -f "${dst}.tmp"
  68        fi
  69}
  70
  71# (Re)generate include/applets.h
  72sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
  73| generate \
  74        "$srctree/include/applets.src.h" \
  75        "include/applets.h" \
  76        "/* DO NOT EDIT. This file is generated from applets.src.h */" \
  77        "$srctree/embed"
  78
  79# (Re)generate include/usage.h
  80# We add line continuation backslash after each line,
  81# and insert empty line before each line which doesn't start
  82# with space or tab
  83TAB="$(printf '\tX')"
  84TAB="${TAB%X}"
  85LF="$(printf '\nX')"
  86LF="${LF%X}"
  87sed -n -e 's@^//usage:\([ '"$TAB"'].*\)$@\1 \\@p' \
  88       -e 's@^//usage:\([^ '"$TAB"'].*\)$@\'"$LF"'\1 \\@p' \
  89        "$srctree"/*/*.c "$srctree"/*/*/*.c \
  90| generate \
  91        "$srctree/include/usage.src.h" \
  92        "include/usage.h" \
  93        "/* DO NOT EDIT. This file is generated from usage.src.h */"
  94
  95# (Re)generate */Kbuild and */Config.in
  96# We skip .dotdirs - makes git/svn/etc users happier
  97{ cd -- "$srctree" && find . -type d ! '(' -name '.?*' -prune ')'; } \
  98| while read -r d; do
  99        d="${d#./}"
 100
 101        src="$srctree/$d/Kbuild.src"
 102        dst="$d/Kbuild"
 103        if test -f "$src"; then
 104                mkdir -p -- "$d" 2>/dev/null
 105
 106                sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
 107                | generate \
 108                        "${src}" "${dst}" \
 109                        "# DO NOT EDIT. This file is generated from Kbuild.src"
 110        fi
 111
 112        src="$srctree/$d/Config.src"
 113        dst="$d/Config.in"
 114        if test -f "$src"; then
 115                mkdir -p -- "$d" 2>/dev/null
 116
 117                sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
 118                | generate \
 119                        "${src}" "${dst}" \
 120                        "# DO NOT EDIT. This file is generated from Config.src"
 121        fi
 122done
 123
 124# Last read failed. This is normal. Don't exit with its error code:
 125exit 0
 126