#!/usr/bin/env bash
#set -x
set -euo pipefail
IFS=$'\n\t'
export GO111MODULE=on

LAST_TAG=$(git tag -l | sort -V | grep -v -- '-rc' | grep 'v'| tail -n1)

git log --oneline --merges --reverse $LAST_TAG...master |
while read MERGE
do
	commit=$(echo $MERGE | awk '{ print $1 }')
	prnum=$(echo $MERGE | awk '{ print $5 }' | tr -d '#')
	desc=$(git show $commit | sed '8q;d' | sed 's/^    //g')
	printf "  - %s ([ipfs/go-ipfs#%s](https://github.com/ipfs/go-ipfs/pull/%s))\n" "$desc" "$prnum" "$prnum"
done

TMP_DIR=$(mktemp -d --tmpdir go-ipfs-mkreleaselog-XXXXXX)
git show "$LAST_TAG:go.mod" > "$TMP_DIR/go.mod"

echo
echo "Dependecy updates:"
join -a 2 <(cd "$TMP_DIR" && go list -m all | sort -k 1b,1) <(go list -m all | sort -k 1b,1) | awk \
	'
	{ if (NF == 2)
		printf "2 - %s none => %s\n", $1, $2
	else if ($2 != $3)
		printf "1 - %s %s => %s\n", $1, $2, $3 }
	' | sort | sed 's/[0-9] //'