#!/bin/bash
#
# A hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# This script checks if all files to be committed fit the needs for 
# a valid fastd-keyfile so it can be pulled to all Freifu9nk gateways
# and used as public key

# Redirect output to stderr.
exec 1>&2

while read keyfile file; do
 if [ $keyfile != ".gitmodules" ]; then
  # sanitize last linebreak:
  tail -c1 "$keyfile" | read -r _ || echo >> "$keyfile" 
  diffstr=$(cat "$keyfile" | grep -v -E "^\s*key\s+\"\w{64}\";\s*(#.*)*$" \
  | grep -v -E "(^\s*#|^\s*remote|^$)")
  if [ "$diffstr" != "" ] ; then
    echo "$keyfile: you have a malformed key in your changes , you can't commit until it has been corrected:"
    echo "$diffstr"
    exit 1
  fi
 fi
done < <(git diff --cached --name-status --diff-filter=ACM | cut -f2)

# check for double keys:
doublekeys="$(cat *|grep key|sed -e 's/#.*$//g; s/ \+/ /g; s/^ //g; s/ $//g'|sort|uniq -c|sort|tail \
              | grep -v "1 key"|cut -d" " -f 9|sed -e 's/[";]//g' \
              | while read key; do \
                grep -H $key *; \
              done)"
if [ "$doublekeys" != "" ] ; then
  echo "those keys are in more than one files:"
  echo "$doublekeys"
  echo "each key is only allowed in one file"
  exit 1
fi

# optionally rename all uppercase letters with :
#for f in *; do NEW="$(echo $f | tr '[A-Z]' '[a-z]')"; if [ "$f" != "$NEW" ]; then git mv -v $f $NEW; fi; done;
# if you use a README file, add this too:
#git mv -v _readme _README