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#!/usr/bin/env bash

# TODO: save base branch (default to origin/master) paired with current branch.
# Subsequent code-review commands should use this base branch.

# TODO: think about renaming this to "init" if there's no corresponding "end"
# subcommand.


GIT_ROOT="$(git rev-parse --show-toplevel)"
DATABASE="${GIT_ROOT}/.git/info/code-review.sqlite"

function create_database () {
	sqlite3 "$DATABASE" <<-SQL
		BEGIN TRANSACTION;

		CREATE TABLE IF NOT EXISTS merge_bases (
			id INTEGER PRIMARY KEY,
			head TEXT NOT NULL,
			base TEXT NOT NULL
		);

		COMMIT;
	SQL
}

function create_database_if_not_exists () {
	if [ ! -f "$DATABASE" ]; then
		create_database
	fi
}

function create_merge_base () {
	local head="$1"
	local base="$2"

	sqlite3 "$DATABASE" <<-SQL
		BEGIN TRANSACTION;

		INSERT INTO merge_bases
			(head, base)
		VALUES
			(
				'$head',
				'$base'
			);

		COMMIT;
	SQL
}

function create_merge_base_from_current () {
	local base="$1"
	local current_branch=$(git rev-parse --abbrev-ref HEAD)

	create_merge_base "$current_branch" "$base"
}


create_database_if_not_exists


merge_base='origin/master'
if [ $# -eq 1 ]; then
	merge_base="$1"
fi

create_merge_base_from_current "$merge_base"