cilium

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#!/usr/bin/env bash
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# SPDX-License-Identifier: Apache-2.0
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# Copyright Authors of Cilium
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source $(dirname $(readlink -ne $BASH_SOURCE))/../release/lib/common.sh
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source $TOOL_LIB_PATH/gitlib.sh
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source $(dirname $(readlink -ne $BASH_SOURCE))/common.sh
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require_linux
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# Validate command-line
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common::argc_validate 1
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BRANCH="${1:-}"
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if [ "$BRANCH" = "" ]; then
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    BRANCH=$(git symbolic-ref --short HEAD)
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fi
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BRANCH=$(echo "$BRANCH" | sed 's/^v//')
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# Extra optional suffix in cases where there are multiple backport PRs that
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# have the same conflicting branch name.
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SUFFIX="${2}"
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REMOTE=$(get_remote)
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git fetch "${REMOTE}"
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if ! git branch -a | grep -q "${REMOTE}/v$BRANCH$" ; then
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    echo "usage: start-backport <branch version> [suffix]" 1>&2
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    echo "  (detected branch $BRANCH)" 1>&2
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    common::exit 1
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fi
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DATE=$(date --rfc-3339=date)
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PRBRANCH="pr/v${BRANCH}-backport-${DATE}${SUFFIX}"
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if (git --no-pager branch | grep -q "${PRBRANCH}"); then
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    echo "Error: branch '${PRBRANCH}' already exists"
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    echo "Consider passing a suffix as the second parameter"
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    echo
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    echo "Example:"
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    echo "  ./contrib/backporting/start-backport ${BRANCH} \"-2\""
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    common::exit 1
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fi
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git checkout -b "${PRBRANCH}" "${REMOTE}/v${BRANCH}"
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contrib/backporting/check-stable $BRANCH v$BRANCH-backport-$DATE.txt
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