Add a `make-release` script

1 files changed, 48 insertions, 0 deletions

diff --git a/make-release b/make-release
new file mode 100755
index 0000000..8646bc1
--- /dev/null
+++ b/make-release
@@ -0,0 +1,48 @@
+#!/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