feat: add patch series, build scripts and release automation

scripts/common.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# Shared settings for every script in this repository.
+#
+# Source this, do not run it.
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+# Where the Modrinth App sources come from, and which release of them the
+# patches in this repository are written against.
+UPSTREAM_REPO="${UPSTREAM_REPO:-https://github.com/modrinth/code.git}"
+UPSTREAM_REF="${UPSTREAM_REF:-$(tr -d '[:space:]' <"$REPO_ROOT/upstream.txt")}"
+
+# The patched checkout. Everything in here is disposable: it is recreated from
+# the upstream tag plus patches/ and is never committed to this repository.
+WORKTREE="${WORKTREE:-$REPO_ROOT/build/upstream}"
+
+# Branch the patches are applied on top of the upstream tag as.
+PATCH_BRANCH=enhanced
+
+PATCH_DIR="$REPO_ROOT/patches"
+
+log() {
+	printf '\033[1;32m==>\033[0m %s\n' "$*"
+}
+
+warn() {
+	printf '\033[1;33m==>\033[0m %s\n' "$*" >&2
+}
+
+die() {
+	printf '\033[1;31m==>\033[0m %s\n' "$*" >&2
+	exit 1
+}
+
+# Version the built app reports, derived from the upstream tag it is built
+# from: `v0.20.5` becomes `0.20.5`.
+app_version() {
+	printf '%s\n' "${UPSTREAM_REF#v}"
+}
+
+require_worktree() {
+	[ -d "$WORKTREE/.git" ] || die "No patched checkout at $WORKTREE. Run scripts/prepare.sh first."
+}