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#!/usr/bin/env bash
if [ $# -eq 0 ]; then
# With no args, read stdin to scrape compiler output.
# shellcheck disable=SC2046
set -- $(while read -r LINE; do
case "$LINE" in
*undefined\ reference\ to*)
# file.cc:(.text+0x10): undefined reference to `foo()'
LINE=${LINE#*undefined reference to \`}
echo "${LINE%\'*}"
;;
*undefined\ symbol:*)
# ld: error: undefined symbol: foo()
echo "${LINE#*undefined symbol: }"
;;
*)
continue
;;
esac; done | LC_ALL=C sort -u)
fi
for SYMBOL; do
# If there are multiple declarations, pick first (eg. common/memleak.h
# has notleak_ as a declaration, and then an inline).
WHERE=$(grep -nH "^[a-zA-Z0-9_ (),]* [*]*$SYMBOL(" ./*/*.h | head -n1)
if [ x"$WHERE" = x ]; then
echo "/* Could not find declaration for $SYMBOL */"
continue
fi
FILE=${WHERE%%:*}
FILE_AND_LINE=${WHERE%:*}
LINE=${FILE_AND_LINE#*:}
END=$(tail -n "+${LINE}" < "$FILE" | grep -n ';$');
NUM=${END%%:*}
if grep -q "$SYMBOL.*mock empty" "$FILE"; then
STUB="{ }"
else
# \n on RHS is a GNU extension, and we want to work on FreeBSD
# shellcheck disable=SC1004
STUB='\
{ fprintf(stderr, "'$SYMBOL' called!\\n"); abort(); }'
fi
echo "/* Generated stub for $SYMBOL */"
tail -n "+${LINE}" < "$FILE" | head -n "$NUM" | sed 's/^extern *//' | sed 's/PRINTF_FMT([^)]*)//' | sed 's/NON_NULL_ARGS([^)]*)//' | sed 's/NO_NULL_ARGS//g' | sed 's/NORETURN//g' | sed 's/LAST_ARG_NULL//g' | sed 's/WARN_UNUSED_RESULT//g' | sed 's/,/ UNNEEDED,/g' | sed 's/\([a-z0-9A-Z*_]* [a-z0-9A-Z*_]*\));/\1 UNNEEDED);/' | sed "s/;\$/$STUB/" | sed 's/[[:space:]]*$//'
done