LXR busybox/scripts/gen_build

   1#!/bin/sh
   2
   3test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   4
   5# cd to objtree
   6cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   7# In separate objtree build, include/ might not exist yet
   8mkdir include 2>/dev/null
   9
  10srctree="$1"
  11
  12# (Re)generate include/applets.h
  13src="$srctree/include/applets.src.h"
  14dst="include/applets.h"
  15s=`sed -n 's@^//applet:@@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  16old=`cat "$dst" 2>/dev/null`
  17# Why "IFS='' read -r REPLY"??
  18# This atrocity is needed to read lines without mangling.
  19# IFS='' prevents whitespace trimming,
  20# -r suppresses backslash handling.
  21new=`echo "/* DO NOT EDIT. This file is generated from applets.src.h */"
  22while IFS='' read -r REPLY; do
  23        test x"$REPLY" = x"INSERT" && REPLY="$s"
  24        printf "%s\n" "$REPLY"
  25done <"$src"`
  26if test x"$new" != x"$old"; then
  27        echo "  GEN     $dst"
  28        printf "%s\n" "$new" >"$dst"
  29fi
  30
  31# (Re)generate include/usage.h
  32src="$srctree/include/usage.src.h"
  33dst="include/usage.h"
  34# We add line continuation backslash after each line,
  35# and insert empty line before each line which doesn't start
  36# with space or tab
  37# (note: we need to use \\\\ because of ``)
  38s=`sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\\\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\\\@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
  39old=`cat "$dst" 2>/dev/null`
  40new=`echo "/* DO NOT EDIT. This file is generated from usage.src.h */"
  41while IFS='' read -r REPLY; do
  42        test x"$REPLY" = x"INSERT" && REPLY="$s"
  43        printf "%s\n" "$REPLY"
  44done <"$src"`
  45if test x"$new" != x"$old"; then
  46        echo "  GEN     $dst"
  47        printf "%s\n" "$new" >"$dst"
  48fi
  49
  50# (Re)generate */Kbuild and */Config.in
  51{ cd -- "$srctree" && find -type d; } | while read -r d; do
  52        d="${d#./}"
  53
  54        src="$srctree/$d/Kbuild.src"
  55        dst="$d/Kbuild"
  56        if test -f "$src"; then
  57                mkdir -p -- "$d" 2>/dev/null
  58                #echo "  CHK     $dst"
  59
  60                s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  61
  62                old=`cat "$dst" 2>/dev/null`
  63                new=`echo "# DO NOT EDIT. This file is generated from Kbuild.src"
  64                while IFS='' read -r REPLY; do
  65                        test x"$REPLY" = x"INSERT" && REPLY="$s"
  66                        printf "%s\n" "$REPLY"
  67                done <"$src"`
  68                if test x"$new" != x"$old"; then
  69                        echo "  GEN     $dst"
  70                        printf "%s\n" "$new" >"$dst"
  71                fi
  72        fi
  73
  74        src="$srctree/$d/Config.src"
  75        dst="$d/Config.in"
  76        if test -f "$src"; then
  77                mkdir -p -- "$d" 2>/dev/null
  78                #echo "  CHK     $dst"
  79
  80                s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  81
  82                old=`cat "$dst" 2>/dev/null`
  83                new=`echo "# DO NOT EDIT. This file is generated from Config.src"
  84                while IFS='' read -r REPLY; do
  85                        test x"$REPLY" = x"INSERT" && REPLY="$s"
  86                        printf "%s\n" "$REPLY"
  87                done <"$src"`
  88                if test x"$new" != x"$old"; then
  89                        echo "  GEN     $dst"
  90                        printf "%s\n" "$new" >"$dst"
  91                fi
  92        fi
  93done
  94
  95# Last read failed. This is normal. Don't exit with its error code:
  96exit 0
  97