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#!/usr/bin/env bash
# Copyright 2016-2018 Luke Shumaker
set -e
branch=$(git name-rev --name-only HEAD)
if [[ $branch == master ]]; then
gitdir="$(git rev-parse --git-dir)"
workdir="${gitdir}/release"
exec 8>"${workdir}.lock"
flock 8
rm -rf -- "$workdir"
git worktree prune
git branch -D release.tmp &>/dev/null || true
unset GIT_INDEX_FILE
git worktree add -b release.tmp "${gitdir}/release" master
(
unset GIT_DIR GIT_WORK_TREE
cd "$workdir"
go generate ./...
git ls-files -z '*/.gitignore' | xargs -0r rm -f --
git add .
git commit -m "Generate artifacts"
git checkout release # Ensure it exists locally
git pull --no-edit -s ours # Avoid conflicts
# What we want is
#
# git merge --no-edit -s theirs release.tmp
#
# Unfortunately, there is no 'theirs' strategy; so we
# have to switch branches and do it backward with the
# 'ours' strategry, switch back, then merge the merge
# commit.
git checkout release.tmp
git merge --no-edit -s ours release
git checkout release
git merge release.tmp
git branch -d release.tmp
)
rm -rf -- "$workdir"
git worktree prune
fi
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