vimdef: find function/macro definitions and open them in vim

.vimdef.sh

#!/bin/bash
#
# Author: Emily Shaffer (2020)
# usage: vimdef <full-fn-name> [<git grep arg>...]"
# opens vim to the definiton of the provided function name using fuzzy regex magic


# Opens vim to a given file and line number.
# $1 = file
# $2 = line number
# $3+ discarded
function open_vim_to_loc {
  vim +"$2" "$1"
}


if [[ -z "$@" ]]; then
  echo "usage: vimdef <full-fn-name> [<git grep arg>...]"
  exit
fi

# A definition has some types at the very front of the line, separated by one
# whitespace each, then the function name.
# It takes the form of <filename>:<line>:<matched-string>
DEF="$(git grep -E -e "^([a-z]+ )+$1\(" "${@:2}" -- ":!*.h*")"

# If there wasn't a match, this might be a macro.
if [[ -z "$DEF" ]]; then
  DEF="$(git grep -E -e "^#define $1" "${@:2}")"
fi

if [[ -z "$DEF" ]]; then
  git grep $1
  exit
fi

# Don't quote $() because we want it interpreted as separate args.
open_vim_to_loc $(echo $DEF | tr ':' ' ')