c_binaries_functions_script

#!/bin/bash

BINNAME="$1"
SRCPATH="${2:-./src}"

YW="\e[33m"
RD="\e[31m"
NC="\e[0m"

if [ -z "$BINNAME" ]; then
  echo -e "${YW}This little script will print out all the functions that you defined in your code, but you're not using in the final binary (yes the static ones too)."
  echo -e "If you have done the bonuses and compiled the mandatory binary, this will probably flag functions that you do use in the bonus part. Watch out for false-positives.${NC}\n"
  echo -e "${RD}Usage: $0 <binary-name> [source-path]${NC}" >&2
  exit 1
fi

if [ ! -d "$SRCPATH" ]; then
  echo -e "${RD}Source path \`${SRCPATH}\` not found. Run without arguments for usage.${NC}"
  exit 1
fi

comm -23 \
  <(ctags -R --languages=C --c-kinds=f --fields=+n --output-format=json "$SRCPATH" |
    jq -r 'select(._type == "tag" and .kind == "function") | .name' |
    sort -u) \
  <(nm -g "$BINNAME" 2>/dev/null |
    awk '{ print $3 }' |
    sort -u)