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
  20generate()
  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' "${src}"
  31                # copy stdin to stdout
  32                cat
  33                # print everything after INSERT line
  34                sed -n '/^INSERT$/ {
  35                :l
  36                    n
  37                    p
  38                    bl
  39                }' "${src}"
  40        } >"${dst}.tmp"
  41        if ! cmp -s "${dst}" "${dst}.tmp"; then
  42                gen "${dst}"
  43                mv "${dst}.tmp" "${dst}"
  44        else
  45                rm -f "${dst}.tmp"
  46        fi
  47}
  48
  49# (Re)generate include/applets.h
  50sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
  51| generate \
  52        "$srctree/include/applets.src.h" \
  53        "include/applets.h" \
  54        "/* DO NOT EDIT. This file is generated from applets.src.h */"
  55
  56# (Re)generate include/usage.h
  57# We add line continuation backslash after each line,
  58# and insert empty line before each line which doesn't start
  59# with space or tab
  60TAB="$(printf '\tX')"
  61TAB="${TAB%X}"
  62LF="$(printf '\nX')"
  63LF="${LF%X}"
  64sed -n -e 's@^//usage:\([ '"$TAB"'].*\)$@\1 \\@p' \
  65       -e 's@^//usage:\([^ '"$TAB"'].*\)$@\'"$LF"'\1 \\@p' \
  66        "$srctree"/*/*.c "$srctree"/*/*/*.c \
  67| generate \
  68        "$srctree/include/usage.src.h" \
  69        "include/usage.h" \
  70        "/* DO NOT EDIT. This file is generated from usage.src.h */"
  71
  72# (Re)generate */Kbuild and */Config.in
  73# We skip .dotdirs - makes git/svn/etc users happier
  74{ cd -- "$srctree" && find . -type d ! '(' -name '.?*' -prune ')'; } \
  75| while read -r d; do
  76        d="${d#./}"
  77
  78        src="$srctree/$d/Kbuild.src"
  79        dst="$d/Kbuild"
  80        if test -f "$src"; then
  81                mkdir -p -- "$d" 2>/dev/null
  82
  83                sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
  84                | generate \
  85                        "${src}" "${dst}" \
  86                        "# DO NOT EDIT. This file is generated from Kbuild.src"
  87        fi
  88
  89        src="$srctree/$d/Config.src"
  90        dst="$d/Config.in"
  91        if test -f "$src"; then
  92                mkdir -p -- "$d" 2>/dev/null
  93
  94                sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
  95                | generate \
  96                        "${src}" "${dst}" \
  97                        "# DO NOT EDIT. This file is generated from Config.src"
  98        fi
  99done
 100
 101# Last read failed. This is normal. Don't exit with its error code:
 102exit 0
 103