release

#!/usr/bin/env bash
set -euo pipefail

err()
{
    echo >&2 "Error: $*"
    exit 1
}

log_run()
{
    echo >&2 "+ $*"
    "$@"
}

git status --porcelain | grep -q "" &&
    err "working tree is dirty, commit your changes first."

[[ "$1" =~ ^v([0-9]+)\.([0-9]+)(\.([0-9]+))?(-rc([0-9]+))?$ ]] ||
    err "arg1 accepts the following formats: v1.0 v1.0.0 v1.0-rc1 v1.0.1-rc1"

git tag | grep -q "^$1$" &&
    err "tag $1 already exists"

# sanity test
make lint

log_run sed -i'' 's/^\(BTRFS_AUTO_SNAPSHOT_VERSION\)=.*/\1='"$1/" btrfs-auto-snapshot
log_run git add btrfs-auto-snapshot
log_run git commit -m "btrfs-auto-snapshot $1"

last_tag=$(git tag | tail -1)
{
    echo btrfs-auto-snapshot "$1"
    echo
    echo Changes since "$last_tag":
    git log --pretty=format:"- [%an] %s" "$last_tag"..HEAD
} | log_run git tag -F - "$1"

log_run sed -i'' 's/^\(BTRFS_AUTO_SNAPSHOT_VERSION\)=.*/\1='"$1+dev/" btrfs-auto-snapshot
log_run git add btrfs-auto-snapshot
log_run git commit -m "btrfs-auto-snapshot $1+dev"

echo
echo "You have tagged $1. Now run the following:"
echo "  git push origin master"
echo "  git push origin $1"