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# A bunch of shell functions that help finding unnecessary includes.
# Relies on appropriate versions of etags, grep, tr, awk and maybe bash.
#
# To use:
# $ . util/include.sh
# $ checkall
# Tries to list all names defined in the header file $1.
# Indented names are assumed to be members that don't need to be checked,
# which will fail for indented declarations with #ifdefs.
names ()
{
b=$(basename $1 .h);
etags --declarations -D $1 -o - | grep '^[#a-z]' | grep -v '^'$b'\.h' \
| tr '\177' '\t' | awk '{ print $(NF-1) }'
}
# lists possible uses in $2 of names defined in $1
mightuse ()
{
for n in $(names $1);
do
if grep -F $n $2; then
return 0;
fi;
done;
return 1
}
# checks whether source file $2 #include's $1
includes ()
{
grep '#include "'$1'"' $2
}
# echo arguments if $2 includes $1 put shouldn't
check ()
{
if includes $1 $2 > /dev/null && ! mightuse $1 $2 > /dev/null; then
echo $1 $2;
fi
}
# run check on all source for a given header
# should really cache the result of "names"
checkhdr ()
{
for src in *.cc; do
check $1 $src
done
}
# run check on all pairs
checkall ()
{
for hdr in *.h; do
if [ $hdr = AppHdr.h ]; then
continue;
fi
checkhdr $hdr
done
}
# remove #include of $1 from $2
remove ()
{
b=$(basename $1 .h)
sed -e '/^#include "'$b'\.h"$/d' < $2 > $2.rmincl
mv $2.rmincl $2
}
# remove doubtful includes for a list as output by checkall.
removelst ()
{
while read hdr src; do
remove $hdr $src
done
}
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