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llvm-mirror/utils/release/merge-git.sh
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

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#!/bin/bash
#===-- merge-git.sh - Merge commit to the stable branch --------------------===#
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
#===------------------------------------------------------------------------===#
#
# This script will merge an svn revision to a git repo using git-svn while
# preserving the svn commit message.
#
# NOTE: This script has only been tested with the per-project git repositories
# and not with the monorepo.
#
# In order to use this script, you must:
# 1) Checkout the stable branch you would like to merge the revision into.
# 2) Correctly configure the branch as an svn-remote by adding the following to
# your .git/config file for your git repo (replace xy with the major/minor
# version of the release branch. e.g. release_50 or release_60):
#
#[svn-remote "release_xy"]
#url = https://llvm.org/svn/llvm-project/llvm/branches/release_xy
#fetch = :refs/remotes/origin/release_xy
#
# Once the script completes successfully, you can push your changes with
# git-svn dcommit
#
#===------------------------------------------------------------------------===#
usage() {
echo "usage: `basename $0` [OPTIONS]"
echo " -rev NUM The revision to merge into the project"
}
while [ $# -gt 0 ]; do
case $1 in
-rev | --rev | -r )
shift
rev=$1
;;
-h | -help | --help )
usage
;;
* )
echo "unknown option: $1"
echo ""
usage
exit 1
;;
esac
shift
done
if [ -z "$rev" ]; then
echo "error: need to specify a revision"
echo
usage
exit 1
fi
# Rebuild revision map
git svn find-rev r$rev origin/master &>/dev/null
git_hash=`git svn find-rev r$rev origin/master`
if [ -z "$git_hash" ]; then
echo "error: could not determine git commit for r$rev"
exit 1
fi
commit_msg=`svn log -r $rev https://llvm.org/svn/llvm-project/`
ammend="--amend"
git cherry-pick $git_hash
if [ $? -ne 0 ]; then
echo ""
echo "** cherry-pick failed enter 'e' to exit or 'c' when you have finished resolving the conflicts:"
read option
case $option in
c)
ammend=""
;;
*)
exit 1
;;
esac
fi
git commit $ammend -m "Merging r$rev:" -m "$commit_msg"