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|
#!/bin/sh
# Note: was using sed OPTS CMD -- FILES
# but users complain that many sed implementations
# are misinterpreting --.
test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
# cd to objtree
cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
# In separate objtree build, include/ might not exist yet
mkdir include 2>/dev/null
srctree="$1"
status() { printf ' %-8s%s\n' "$1" "$2"; }
gen() { status "GEN" "$@"; }
chk() { status "CHK" "$@"; }
generate()
{
# NB: data to be inserted at INSERT line is coming on stdin
local src="$1" dst="$2" header="$3"
#chk "${dst}"
{
# Need to use printf: different shells have inconsistent
# rules re handling of "\n" in echo params.
printf "%s\n" "${header}"
# print everything up to INSERT line
sed -n '/^INSERT$/q;1,/^INSERT$/p' "${src}"
# copy stdin to stdout
cat
# print everything after INSERT line
sed -n '/^INSERT$/{:l;n;p;bl}' "${src}"
} >"${dst}.tmp"
if ! cmp -s "${dst}" "${dst}.tmp"; then
gen "${dst}"
mv "${dst}.tmp" "${dst}"
else
rm -f "${dst}.tmp"
fi
}
# (Re)generate include/applets.h
sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
| generate \
"$srctree/include/applets.src.h" \
"include/applets.h" \
"/* DO NOT EDIT. This file is generated from applets.src.h */"
# (Re)generate include/usage.h
# We add line continuation backslash after each line,
# and insert empty line before each line which doesn't start
# with space or tab
sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
| generate \
"$srctree/include/usage.src.h" \
"include/usage.h" \
"/* DO NOT EDIT. This file is generated from usage.src.h */"
# (Re)generate */Kbuild and */Config.in
{ cd -- "$srctree" && find . -type d; } | while read -r d; do
d="${d#./}"
src="$srctree/$d/Kbuild.src"
dst="$d/Kbuild"
if test -f "$src"; then
mkdir -p -- "$d" 2>/dev/null
sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
| generate \
"${src}" "${dst}" \
"# DO NOT EDIT. This file is generated from Kbuild.src"
fi
src="$srctree/$d/Config.src"
dst="$d/Config.in"
if test -f "$src"; then
mkdir -p -- "$d" 2>/dev/null
sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
| generate \
"${src}" "${dst}" \
"# DO NOT EDIT. This file is generated from Config.src"
fi
done
# Last read failed. This is normal. Don't exit with its error code:
exit 0
|
