unixorn/git-extra-commands

#!/usr/bin/env bash
#
# Prints side-by-side git diffs like you're used to seeing on GitHub
#
# Based on a snippet by @hefeweisen on the #commandline-fu channel on CoffeeOps

set -o pipefail

if [[ -n "$DEBUG" ]]; then
  set -x
fi

function fail() {
  printf '%s\n' "$1" >&2  ## Send message to stderr. Exclude >&2 if you don't want it that way.
  exit "${2-1}"  ## Return a code specified by $2 or 1 by default.
}

function has() {
  # Check if a command is in $PATH
  which "$@" > /dev/null 2>&1
}

if ! has 'delta'; then
  # shellcheck disable=SC2086
  failureMsg="$(basename $0) requires git-delta."
  if [[ $(uname) != 'Darwin' ]]; then
    failureMsg="${failureMsg} On macOS you can install it with 'brew install git-delta'."
  fi
  fail "$failureMsg"
fi

exec git -c diff.colorMoved=default \
  -c merge.conflictsytle=diff3 \
  -c core.pager=delta \
  -c interactive.diffFilter='delta --color-only' \
  -c delta.side-by-side=true \
  show "$@"