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#!/bin/bash
#===-- merge-git.sh - Merge commit to the stable branch --------------------===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License.
#
#===------------------------------------------------------------------------===#
#
# 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"
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