#!/bin/sh
#echo Checking git message in $1

usage="\n
Please see the guidelines for git commit messages in the CONTRIBUTORS file\n
Your git commit message should start with a line of the form\n
\n
HPCC-XXXX Short description\n
\n
where XXXX is the Jira issue number that this commit is referencing, and\n
short description is a brief description of the issue that will appear in\n
the --oneline version of the generated changelog.\n
\n
Use git commit -s -t $1 to reopen previous message for editing\n"


(head -1 "$1" | grep -E -q "^HPCC-[0-9]+ |^Merge ") || {
  echo >&2 "\n ERROR: Missing Jira issue on beginning of first line (HPCC-XXXX)"
  echo >&2 $usage
  exit 1
}

(head -1 "$1" | grep -E -q "[^.]$") || {
  echo >&2 "\n ERROR: Please don't use . at the end of the short description"
  echo >&2 $usage
  exit 1
}

(head -1 "$1" | grep -E -q "^HPCC-[0-9]+ [^a-z]|^Merge ") || {
  echo >&2 "\n ERROR: Short description should start with a capital"
  echo >&2 $usage
  exit 1
}

(head -2 "$1" | tail -1 | grep -E -q "^$") || {
  echo >&2 "\n ERROR: Short description must be followed by a blank line. Have you signed your commit?"
  echo >&2 $usage
  exit 1
}

[ $(grep -v '^#' "$1" | wc -L ) -le 80 ] || {
  echo >&2 "\n ERROR: Commit message lines too long (max 80 chars)."
  echo >&2 $usage
  exit 1
}

(grep -q "^Signed-off-by: " "$1") || {
  echo >&2 "\n ERROR: Commit not signed. All commits should be signed (use git commit -s)."
  echo >&2 $usage
  exit 1
}