Differential D4279 Diff 14575 contrib/arcanist/autopatch.sh

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contrib/arcanist/autopatch.sh

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				#!/usr/bin/env bash
				# Copyright (c) 2019 The Bitcoin developers
				# Distributed under the MIT software license, see the accompanying
				# file COPYING or http://www.opensource.org/licenses/mit-license.php.

				export LC_ALL=C.UTF-8

				set -euxo pipefail

				DEFAULT_PATCH_ARGS="--skip-dependencies"
				DEFAULT_REMOTE="origin"
				DEFAULT_BRANCH="master"

				help_message() {
				set +x
				echo "Apply a patch from Phabricator cleanly on latest master."
				echo ""
				echo "Options:"
				echo "-b, --branch The git branch to fetch and rebase onto. Default: '${DEFAULT_BRANCH}'"
				echo "-h, --help Display this help message."
				echo "-o, --remote The git remote to fetch latest from. Default: '${DEFAULT_REMOTE}'"
				echo "-p, --patch-args Args to pass to 'arc patch'. Default: '${DEFAULT_PATCH_ARGS}'"
				echo "-r, --revision The Differential revision ID used in Phabricator that you want to land. (ex: D1234)"
				echo " This argument is required if --patch-args does not specify a revision or diff ID."
				set -x
				}

				BRANCH="${DEFAULT_BRANCH}"
				PATCH_ARGS="${DEFAULT_PATCH_ARGS}"
				REMOTE="${DEFAULT_REMOTE}"
				REVISION=""

				# Parse command line arguments
				while [[ $# -gt 0 ]]; do
				case $1 in
				-b\|--branch)
				BRANCH="$2"
				shift # shift past argument
				shift # shift past value
				;;
				-h\|--help)
				help_message
				exit 0
				shift # shift past argument
				;;
				-o\|--remote)
				REMOTE="$2"
				shift # shift past argument
				shift # shift past value
				;;
				-p\|--patch-args)
				PATCH_ARGS="$2"
				shift # shift past argument
				shift # shift past value
				;;
				-r\|--revision)
				REVISION="$2"
				shift # shift past argument
				shift # shift past value
				;;
				*)
				echo "Unknown argument: $1"
				help_message
				exit 1
				shift # shift past argument
				;;
				esac
				done

				PATCH_ARGS="${REVISION} ${PATCH_ARGS}"

				# Make sure there are no unstaged changes, just in case this script is being run locally
				if [ -n "$(git status --porcelain)" ]; then
				echo "Error: The source tree has unexpected changes. Clean up any changes (try 'git stash') and try again."
				exit 10
				fi

				# Fetch and checkout latest changes, bailing if the branch isn't an ancestor of the remote branch.
				REMOTE_AND_BRANCH="${REMOTE}/${BRANCH}"
				git fetch "${REMOTE}" "${BRANCH}:${REMOTE_AND_BRANCH}"
				git checkout "${BRANCH}"
				git merge-base --is-ancestor "${BRANCH}" "${REMOTE_AND_BRANCH}" \|\| {
				echo "Error: Branch '${BRANCH}' is not an ancestor of '${REMOTE_AND_BRANCH}'"
				exit 11
				}
				git pull "${REMOTE}" "${BRANCH}"

				(
				# If arc fails, there may be a dangling branch. Clean it up before exiting.
				cleanup() {
				CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
				git checkout "${BRANCH}"
				git branch -D "${CURRENT_BRANCH}" \|\| true
				}
				trap "cleanup" ERR

				# Note: `: \| arc ...` pipes an empty string to stdin incase arcanist prompts
				# for user input. This fails and is treated as an error.
				: \| arc patch ${PATCH_ARGS}
				)

				git rebase "${BRANCH}"