build(worktree): add script for setting up git worktrees

Signed-off-by: Deluan <deluan@navidrome.org>

.gitignore

@@ -38,3 +38,4 @@ AGENTS.md
 *.ndp
 openspec/
 go.work*
+.worktrees/

Makefile

@@ -233,6 +233,39 @@ get-music: ##@Development Download some free music from Navidrome's demo instanc
 .PHONY: get-music
 
 
+##########################################
+#### Worktrees
+
+WORKTREES_DIR := .worktrees
+
+wt: check_go_env ##@Worktrees Create and setup a git worktree. Usage: make wt name=feature-name [go=1]
+	@if [ -z "${name}" ]; then echo "Usage: make wt name=<branch-name> [go=1]"; exit 1; fi
+	@mkdir -p $(WORKTREES_DIR)
+	@echo "Creating worktree for branch '${name}'..."
+	@git worktree add $(WORKTREES_DIR)/${name} -b ${name} 2>/dev/null || \
+		git worktree add $(WORKTREES_DIR)/${name} ${name}
+	@if [ -n "${go}" ]; then \
+		./scripts/setup-worktree.sh $(WORKTREES_DIR)/${name} --go-only; \
+	else \
+		./scripts/setup-worktree.sh $(WORKTREES_DIR)/${name}; \
+	fi
+	@echo "\nWorktree ready at $(WORKTREES_DIR)/${name}"
+	@echo "  cd $(WORKTREES_DIR)/${name}"
+.PHONY: wt
+
+rm-wt: ##@Worktrees Remove a git worktree. Usage: make rm-wt name=feature-name
+	@if [ -z "${name}" ]; then echo "Usage: make rm-wt name=<branch-name>"; exit 1; fi
+	@if [ ! -d "$(WORKTREES_DIR)/${name}" ]; then echo "Worktree '${name}' not found in $(WORKTREES_DIR)/"; exit 1; fi
+	@echo "Removing worktree '${name}'..."
+	@git worktree remove --force $(WORKTREES_DIR)/${name}
+	@echo "Worktree '${name}' removed."
+	@echo "Note: branch '${name}' still exists. Delete it with: git branch -D ${name}"
+.PHONY: rm-wt
+
+ls-wt: ##@Worktrees List all active git worktrees
+	@git worktree list
+.PHONY: ls-wt
+
 ##########################################
 #### Miscellaneous
 

scripts/setup-worktree.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+#
+# Setup a git worktree for Navidrome development.
+# This script is called automatically by `make worktree` and by Claude Code's
+# worktree isolation, but can also be run standalone:
+#
+#   ./scripts/setup-worktree.sh <worktree-path> [--go-only]
+#
+# Options:
+#   --go-only   Skip frontend (npm) setup. Useful for agents working only on Go code.
+#
+set -euo pipefail
+
+WORKTREE_PATH="${1:?Usage: $0 <worktree-path> [--go-only]}"
+GO_ONLY="${2:-}"
+
+# Resolve the main worktree root (where the original repo lives)
+MAIN_WORKTREE="$(git -C "$WORKTREE_PATH" worktree list --porcelain | head -1 | sed 's/^worktree //')"
+
+if [ ! -d "$WORKTREE_PATH" ]; then
+    echo "ERROR: Worktree path does not exist: $WORKTREE_PATH"
+    exit 1
+fi
+
+cd "$WORKTREE_PATH"
+
+echo "==> Setting up worktree at $WORKTREE_PATH"
+
+# 1. Download Go dependencies
+echo "==> Downloading Go dependencies..."
+go mod download
+
+# 2. Install frontend dependencies (unless --go-only)
+if [ "$GO_ONLY" != "--go-only" ]; then
+    echo "==> Installing frontend dependencies..."
+    (cd ui && npm ci --prefer-offline --no-audit 2>/dev/null || npm ci)
+else
+    echo "==> Skipping frontend setup (--go-only)"
+fi
+
+# 3. Create required directories
+mkdir -p data
+
+# 4. Copy navidrome.toml from main worktree if it exists and not already present
+if [ ! -f navidrome.toml ] && [ -f "$MAIN_WORKTREE/navidrome.toml" ]; then
+    echo "==> Copying navidrome.toml from main worktree..."
+    cp "$MAIN_WORKTREE/navidrome.toml" navidrome.toml
+fi
+
+# 5. Copy existing database from main worktree (already migrated and scanned)
+#    This is much faster than running migrations + a full scan from scratch.
+if [ ! -f data/navidrome.db ] && [ -f "$MAIN_WORKTREE/data/navidrome.db" ]; then
+    echo "==> Copying database from main worktree (pre-migrated, pre-scanned)..."
+    cp "$MAIN_WORKTREE/data/navidrome.db" data/navidrome.db
+fi
+
+echo "==> Worktree setup complete: $WORKTREE_PATH"