busybox/scripts/gen_build_files.sh
Denys Vlasenko 084e2284c7 gen_build_files.sh uses bashism, document it
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-05-15 21:08:51 +02:00

57 lines
1.4 KiB
Bash
Executable File

#!/bin/bash
# bashism:
# "read -r" without variable name reads line into $REPLY
# without stripping whitespace.
test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
# cd to objtree
cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
srctree="$1"
find -type d | while read -r d; do
src="$srctree/$d/Kbuild.src"
dst="$d/Kbuild"
if test -f "$src"; then
echo " CHK $dst"
s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
echo "# DO NOT EDIT. This file is generated from Kbuild.src" >"$dst.$$.tmp"
while read -r; do
test x"$REPLY" = x"INSERT" && REPLY="$s"
printf "%s\n" "$REPLY"
done <"$src" >>"$dst.$$.tmp"
if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
rm -- "$dst.$$.tmp"
else
echo " GEN $dst"
mv -- "$dst.$$.tmp" "$dst"
fi
fi
src="$srctree/$d/Config.src"
dst="$d/Config.in"
if test -f "$src"; then
echo " CHK $dst"
s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
echo "# DO NOT EDIT. This file is generated from Config.src" >"$dst.$$.tmp"
while read -r; do
test x"$REPLY" = x"INSERT" && REPLY="$s"
printf "%s\n" "$REPLY"
done <"$src" >>"$dst.$$.tmp"
if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
rm -- "$dst.$$.tmp"
else
echo " GEN $dst"
mv -- "$dst.$$.tmp" "$dst"
fi
fi
done
# Last read failed. This is normal. Don't exit with its error code:
exit 0