remove hard-coded layout names

Makefile

@@ -1,47 +1,69 @@
 # Makefile for phbar
 #
 # Usage: make <target>
+#
+# NOTE: Never invoke this Makefile with `sudo` (e.g. `sudo make install`).
+# Running `swift build` as root corrupts `.build/` with root-owned files that
+# break subsequent non-root builds (you get "invalid access to …/DerivedSources").
+# The `install`/`uninstall` targets elevate *only* the file copy, and only when
+# the destination is not user-writable, so `sudo` is never needed from the user.
 
-BIN_DIR := $(HOME)/.local/bin
+# Install directory. Override with: make install BIN_DIR=/opt/homebrew/bin
+BIN_DIR ?= /usr/local/bin
 BUILD_DIR := .build/release
 BINARIES := phbar
 
-.PHONY: all build install clean test run
+# Guard: any target that runs Swift must not run under sudo, otherwise it would
+# sprinkle root-owned files across .build/. It fails fast with a helpful message
+# instead of corrupting the build directory. Recursively-expanded (`=`) so that
+# the `$@` automatic variable resolves per-target at recipe time.
+guard_not_root = @if [ "$$(id -u)" = "0" ] && [ -n "$$SUDO_USER" ]; then \
+	echo "❌ 'make $@' must not run under sudo (it would corrupt .build/)." >&2; \
+	echo "   Run 'make install' without sudo; it elevates only the copy step." >&2; \
+	exit 1; \
+fi
+
+.PHONY: all build install clean test run uninstall reinstall help
 
 all: build
 
 # Build all targets in release mode
 build:
+	$(guard_not_root)
 	swift build -c release
 
-# Build and install binaries to ~/.local/bin
+# Build and install binaries. Elevates only the copy when BIN_DIR isn't writable.
 install: build
 	@mkdir -p $(BIN_DIR)
-	@for bin in $(BINARIES); do \
-		cp -f $(BUILD_DIR)/$$bin $(BIN_DIR)/; \
-		done
+	@if [ -w "$(BIN_DIR)" ]; then CP="cp -f"; else CP="sudo cp -f"; fi; \
+	for bin in $(BINARIES); do \
+		$$CP $(BUILD_DIR)/$$bin $(BIN_DIR)/; \
+	done
 	@echo "✅ Installed $(BINARIES) to $(BIN_DIR)"
 
 # Clean build artifacts
 clean:
+	$(guard_not_root)
 	swift package clean
 
 # Run tests
 test:
+	$(guard_not_root)
 	swift test
 
 # Quick test: build, install, and verify
 run: install
 	@echo "Verifying installation..."
 	@for bin in $(BINARIES); do \
-		which $$bin > /dev/null && echo "✓ $$bin: $(shell which $$bin)" || echo "✗ $$bin: not found"; \
+		which $$bin > /dev/null && echo "✓ $$bin: $$($$bin --version 2>/dev/null | head -1)" || echo "✗ $$bin: not found"; \
 		done
 
-# Uninstall binaries from ~/.local/bin
+# Uninstall binaries. Elevates only the remove when BIN_DIR isn't writable.
 uninstall:
-	@for bin in $(BINARIES); do \
-		rm -f $(BIN_DIR)/$$bin; \
-		done
+	@if [ -w "$(BIN_DIR)" ]; then RM="rm -f"; else RM="sudo rm -f"; fi; \
+	for bin in $(BINARIES); do \
+		$$RM $(BIN_DIR)/$$bin; \
+	done
 	@echo "✅ Uninstalled $(BINARIES) from $(BIN_DIR)"
 
 # Rebuild and reinstall (clean + install)
@@ -51,9 +73,12 @@ reinstall: clean install
 help:
 	@echo "Available targets:"
 	@echo "  make build       - Build in release mode"
-	@echo "  make install     - Build and install to ~/.local/bin"
+	@echo "  make install     - Build and install to $(BIN_DIR)"
 	@echo "  make clean       - Clean build artifacts"
 	@echo "  make test        - Run tests"
 	@echo "  make run         - Build, install, and verify"
-	@echo "  make uninstall   - Remove binaries from ~/.local/bin"
+	@echo "  make uninstall   - Remove binaries from $(BIN_DIR)"
 	@echo "  make reinstall   - Clean and reinstall"
+	@echo ""
+	@echo "Override the install location with BIN_DIR, e.g.:"
+	@echo "  make install BIN_DIR=$(HOME)/.local/bin"

Package.swift

@@ -34,10 +34,7 @@ let package = Package(
 			exclude: [
 				"Models/PHEvent/README.md"
 			],
-			resources: [
-				.process("Models/PHConfig/config.toml"),
-				.process("Models/PHTheme/theme.toml"),
-			]
+			resources: [.copy("config")]
 		),
 		.testTarget(
 			name: "phbarTests",

Sources/phbar/CLI/cli+start.swift

@@ -1,34 +0,0 @@
-import AppKit
-import ArgumentParser
-import Foundation
-
-extension phbar {
-	struct start: ParsableCommand {
-		static let configuration = CommandConfiguration(
-			commandName: "start",
-			abstract: "Start the status bar."
-		)
-
-		@Flag(name: .long, help: "Display visual guides to help align elements.")
-		var debug: Bool = false
-
-		mutating func run() throws {
-			let config = try PHConfig.load()
-
-			// NOTE: Make sure NSApp.run() runs in the main thread
-			dispatchPrecondition(condition: .onQueue(.main))
-
-			try MainActor.assumeIsolated {
-				guard !NSScreen.screens.isEmpty else { throw CleanExit.message("No monitor found") }
-
-				let delegate = PHBarDelegate(config: config, debug: debug)
-				let app = NSApplication.shared
-				app.setActivationPolicy(.accessory)
-				app.delegate = delegate
-				app.run()
-
-				throw ExitCode.success
-			}
-		}
-	}
-}

Sources/phbar/Commands/PHBar+Install.swift

@@ -0,0 +1,69 @@
+import ArgumentParser
+import Foundation
+
+extension PHBar {
+	struct Install: ParsableCommand {
+		static let configuration = CommandConfiguration(
+			commandName: "install",
+			abstract: "Start the status bar.",
+			discussion: """
+				Launch the bar as a non-stopping background process.
+				This command is meant to be used for both testing and production.
+
+				When testing, you can provide the `--debug` flag to get visual
+				guidance that helps you configure the blocks and a verbose output from
+				the shell scripts to debug the behaviour.
+				"""
+		)
+
+		private var source: URL? {
+			Bundle.module.url(forResource: "config", withExtension: "")
+		}
+
+		private var destination: URL {
+			let environment = ProcessInfo.processInfo.environment
+
+			let homeDirectory = FileManager.default.homeDirectoryForCurrentUser
+			let standardConfigDirectory = homeDirectory.appending(path: ".config")
+			let xdgConfigDirectory = environment["XDG_CONFIG_HOME"]?.trimmingCharacters(
+				in: .whitespaces)
+			var candidateDirectory: URL
+
+			if let xdgConfigDirectory, xdgConfigDirectory.hasPrefix("/") {
+				candidateDirectory = URL(fileURLWithPath: xdgConfigDirectory)
+			} else if FileManager.default.fileExists(atPath: standardConfigDirectory.relativePath) {
+				candidateDirectory = standardConfigDirectory
+			} else {
+				candidateDirectory = homeDirectory
+			}
+
+			return candidateDirectory.appending(path: "phbar")
+		}
+
+		mutating func run() throws {
+			do {
+				guard let source else { throw PHBar.Error("Failed to locate bundled config") }
+				try FileManager.default.copyItem(at: source, to: destination)
+				try makeExecutable()
+			} catch {
+				throw PHBar.Error("Failed to create config directory", underlyingError: error)
+			}
+
+			throw CleanExit.message("Config directory created at \(destination.relativePath)")
+		}
+
+		private func makeExecutable() throws {
+			let scriptsDirectory = destination.appending(path: "scripts", directoryHint: .isDirectory)
+			let scripts = try FileManager.default.contentsOfDirectory(
+				atPath: scriptsDirectory.relativePath
+			)
+
+			for script in scripts {
+				let path = scriptsDirectory.appending(path: script)
+				var attributes: [FileAttributeKey: Any] = [:]
+				attributes[.posixPermissions] = 0o755  // rwxr-xr-x
+				try FileManager.default.setAttributes(attributes, ofItemAtPath: path.relativePath)
+			}
+		}
+	}
+}

Sources/phbar/Commands/PHBar+Refresh.swift

@@ -1,7 +1,7 @@
 import ArgumentParser
 
-extension phbar {
-	struct refresh: ParsableCommand {
+extension PHBar {
+	struct Refresh: ParsableCommand {
 		static let configuration = CommandConfiguration(
 			commandName: "refresh",
 			abstract: "Refresh the running status bar."

Sources/phbar/Commands/PHBar+Start.swift

@@ -0,0 +1,44 @@
+import AppKit
+import ArgumentParser
+import Foundation
+
+extension PHBar {
+	struct Start: ParsableCommand {
+		static let configuration = CommandConfiguration(
+			commandName: "start",
+			abstract: "Start the status bar.",
+			discussion: """
+				Launch the bar as a non-stopping background process.
+				This command is meant to be used for both testing and production.
+
+				When testing, you can provide the `--debug` flag to get visual
+				guidance that helps you configure the blocks and a verbose output from
+				the shell scripts to debug the behaviour.
+				"""
+		)
+
+		@Flag(name: .long, help: "Display visual guides and print verbose output.")
+		var debug: Bool = false
+
+		mutating func run() throws {
+			let config = try PHConfig.load()
+			let theme = try PHTheme.load(config.theme)
+			let layouts = try PHLayout.load(["default", "mini"])
+
+			// NOTE: Make sure NSApp.run() runs in the main thread
+			dispatchPrecondition(condition: .onQueue(.main))
+
+			try MainActor.assumeIsolated {
+				guard !NSScreen.screens.isEmpty else { throw CleanExit.message("No monitor found") }
+
+				let delegate = PHBarDelegate(config: config, theme: theme, layouts: layouts, debug: debug)
+				let app = NSApplication.shared
+				app.setActivationPolicy(.accessory)
+				app.delegate = delegate
+				app.run()
+
+				throw ExitCode.success
+			}
+		}
+	}
+}

Sources/phbar/Extensions/String+Extensions.swift

@@ -0,0 +1,21 @@
+extension String {
+	/// Expand `$VAR` and `${VAR}` references against `variables`.
+	///
+	/// Unresolved references are left intact rather than blanked, so a typo
+	/// stays visible (e.g. a literal `"$TYPO"` in a color) instead of silently
+	/// vanishing.
+	func expanded(from environment: [String: String]) -> String {
+		var result = self
+
+		// `${VAR}` first, so the `$VAR` pass never sees its inner name.
+		result = result.replacing(/\$\{([A-Za-z_][A-Za-z0-9_]*)\}/) { match in
+			environment[String(match.1)] ?? String(match.0)
+		}
+		// `$VAR`
+		result = result.replacing(/\$([A-Za-z_][A-Za-z0-9_]*)/) { match in
+			environment[String(match.1)] ?? String(match.0)
+		}
+
+		return result
+	}
+}

Sources/phbar/Models/PHBarDelegate.swift

@@ -9,19 +9,19 @@ final class PHBarDelegate: NSObject, NSApplicationDelegate {
 	/// Convenience accessor over `windows`.
 	var controllers: [BarController] { windows.map(\.barController) }
 
-	/// Resolves a controller for any screen from the current config. Swapped by
-	/// `reloadAll()` so a live reload re-reads theme/blocks from disk.
+	/// Resolves a controller for any screen from the current config.
 	var factory: PHBarFactory
 
 	private var observers: [IPCObserver] = []
 	private var screenObserver: NSObjectProtocol?
 
-	/// `config` is captured here (not re-read per screen) so all bars share one
-	/// resolved config + environment for their lifetime. Live reload swaps the
-	/// whole factory via `reloadAll()`.
-	init(config: PHConfig, debug: Bool) {
-		let environment = PHEnvironment.process.merging(config.env)
-		self.factory = PHBarFactory(config: config, environment: environment, debug: debug)
+	init(config: PHConfig, theme: PHTheme, layouts: [String : PHLayout], debug: Bool) {
+		self.factory = PHBarFactory(
+			config: config,
+			theme: theme,
+			layouts: layouts,
+			debug: debug
+		)
 		super.init()
 	}
 

Sources/phbar/Models/PHBarDelegate/PHBarDelegate+Lifecycle.swift

@@ -10,7 +10,7 @@ extension PHBarDelegate {
 		do {
 			controller = try factory.make(for: screen)
 		} catch {
-			stderr("skipping screen \(screen.localizedName): \(error)")
+			stderr("skipping screen \(screen.localizedName): \(error.localizedDescription)")
 			return false
 		}
 		let window = BarWindow(controller: controller)

Sources/phbar/Models/PHBarDelegate/PHBarDelegate+Reload.swift

@@ -1,44 +0,0 @@
-extension PHBarDelegate {
-	// MARK: - Reload (entry points for a future `phbar reload`)
-
-	/// Re-read config from disk and rebuild every bar against it. Screens are
-	/// kept; only theme/blocks/window are re-resolved. This is the global path
-	/// for picking up config edits at runtime.
-	func reloadAll() {
-		let config: PHConfig
-		do {
-			config = try PHConfig.load()
-		} catch {
-			stderr("reload failed, could not read config: \(error)")
-			return
-		}
-		factory = PHBarFactory(
-			config: config,
-			environment: PHEnvironment.process.merging(config.env),
-			debug: factory.debug
-		)
-		rebuildAllBars()
-	}
-
-	/// Rebuild a single monitor's bar against the current factory. Per-monitor
-	/// path for picking up config edits at runtime. Returns `false` if no bar
-	/// currently runs on `name` (or its reload failed to load).
-	@discardableResult
-	func reload(screenNamed name: String) -> Bool {
-		guard let screen = window(named: name)?.barController.screen else { return false }
-		removeBar(for: screen)
-		return addBar(for: screen)
-	}
-
-	/// Tear down every bar and rebuild against the current factory, preserving
-	/// the set of screens.
-	private func rebuildAllBars() {
-		let screens = controllers.map(\.screen)
-		for screen in screens {
-			removeBar(for: screen)
-		}
-		for screen in screens {
-			addBar(for: screen)
-		}
-	}
-}

Sources/phbar/Models/PHBarFactory.swift

@@ -1,38 +1,30 @@
 import AppKit
 
-/// Builds a `BarController` for a screen by resolving its theme, blocks, and
-/// window from the config.
-///
-/// Extracted from `AppDelegate` so the exact same resolution drives initial
-/// launch, hot-plugged monitors (`syncScreens`), and live reload
-/// (`reloadAll` / `reload(screenNamed:)`). Each screen's theme/blocks are
-/// resolved independently, so a failure on one screen can be skipped without
-/// taking down the others.
+/// Builds a `BarController` for a screen by resolving its layout
+/// and window from the config.
 @MainActor
 struct PHBarFactory {
 	let config: PHConfig
-	let environment: PHEnvironment
+	let theme: PHTheme
+	let layouts: [String: PHLayout]
 	let debug: Bool
 
-	/// Resolve theme + blocks for `screen` and build its controller.
+	/// Resolve layout for `screen` and build its controller.
 	///
 	/// - Parameter screen: The screen to build a bar for. Its localized name
 	///   and index in `NSScreen.screens` select any per-monitor config override.
-	/// - Throws: `PHTheme.load` / `PHBlock.load` errors for the resolved names.
+	/// - Throws: `PHBlock.load` error for the resolved names.
 	func make(for screen: NSScreen) throws -> BarController {
 		let name = screen.localizedName
 		let index = NSScreen.screens.firstIndex(of: screen)
-		let theme = try PHTheme.load(
-			config.theme(screenName: name, screenIndex: index),
-			environment: environment
-		)
-		let blocks = try PHBlock.load(config.blocks(screenName: name, screenIndex: index))
+		guard let layout = layouts[config.layout(screenName: name, screenIndex: index)] else {
+			throw PHBar.Error("Layout `\(name)` not found.")
+		}
 		return BarController(
 			config: config,
 			screen: screen,
 			theme: theme,
-			blocks: blocks,
-			environment: environment,
+			layout: layout,
 			debug: debug
 		)
 	}

Sources/phbar/Models/PHBlock.swift

@@ -5,7 +5,6 @@ final class PHBlock: ObservableObject, Decodable, Identifiable {
 	let id = UUID()
 
 	let name: String
-	let _command: String?
 	let textName: String?
 	@Published var text: PHThemeText = .default
 	let styleName: String?
@@ -14,8 +13,8 @@ final class PHBlock: ObservableObject, Decodable, Identifiable {
 	let centered: Bool?
 	var debug: Bool = false
 
-	var command: String {
-		_command ?? PHPaths.configDirectory.appending(path: "scripts/\(name)").relativePath
+	nonisolated var command: String {
+		PHPaths.configDirectory.appending(path: "scripts/\(name)").relativePath
 	}
 
 	var visible: Bool {
@@ -26,10 +25,6 @@ final class PHBlock: ObservableObject, Decodable, Identifiable {
 	/// `nil` when omitted from config.
 	let events: [PHEvent]?
 
-	/// Variables made visible to block scripts. Defaults to phbar's process
-	/// environment; `BarController` overlays the `[env]` section on top.
-	var environment: PHEnvironment = .process
-
 	/// Event source registry used to subscribe to system events. Defaults to the
 	/// shared instance; inject a custom one for testing.
 	var registry: PHEventRegistry = .shared
@@ -44,11 +39,10 @@ final class PHBlock: ObservableObject, Decodable, Identifiable {
 
 	/// Guards against stacking concurrent updates during rapid event bursts
 	/// (e.g. dragging the volume slider fires many events in quick succession).
-	var updateScheduled = false
+	var resolveScheduled = false
 
 	private enum CodingKeys: String, CodingKey {
 		case name
-		case _command = "command"
 		case textName = "text"
 		case styleName = "style"
 		case refresh, events, centered

Sources/phbar/Models/PHBlock/PHBlock+Gesture.swift

@@ -0,0 +1,11 @@
+extension PHBlock {
+	func resolve(with event: PHGestureEvent) {
+		var environment = [String: String]()
+		environment.updateValue(event.type.rawValue, forKey: PHGestureEvent.typeKey)
+		if let data = event.data {
+			environment.updateValue(data, forKey: PHGestureEvent.infoKey)
+		}
+
+		resolve(merging: environment)
+	}
+}

Sources/phbar/Models/PHBlock/PHBlock+Loading.swift

@@ -1,52 +0,0 @@
-import Foundation
-import TOML
-
-extension PHBlock {
-	private struct Wrapper: Decodable {
-		let blocks: [PHBlock]
-
-		private enum CodingKeys: String, CodingKey {
-			case blocks = "block"
-		}
-	}
-
-	/// Load a named block set from `<configDirectory>/blocks/<name>.toml`.
-	///
-	/// - Parameter configDirectory: Override the lookup root (used by tests);
-	///   defaults to the resolved config directory (see `PHPaths`).
-	static func load(_ blocks: String, in configDirectory: URL? = nil) throws -> [PHBlock] {
-		let base = configDirectory ?? PHPaths.configDirectory
-
-		let setFile = base.appending(path: "blocks").appending(path: "\(blocks).toml")
-		guard FileManager.default.fileExists(atPath: setFile.relativePath) else {
-			throw phbar.Error("Failed to load blocks '\(blocks)'")
-		}
-		return try load(from: setFile)
-	}
-
-	/// Load theme from a file at URL.
-	/// If the file doesn't exist or fails to parse, the execution is interrupted.
-	static func load(from url: URL) throws -> [PHBlock] {
-		do {
-			let data = try Data(contentsOf: url)
-			guard let contents = String(data: data, encoding: .utf8), !contents.isEmpty else {
-				throw phbar.Error("the file is empty")
-			}
-			return try load(from: contents)
-		} catch {
-			throw phbar.Error("Failed to load blocks file", underlyingError: error)
-		}
-	}
-
-	/// Load theme from a TOML string.
-	/// If the content fails to parse, the execution is interrupted.
-	static func load(from contents: String) throws -> [PHBlock] {
-		do {
-			let decoder = TOMLDecoder()
-			let wrapper = try decoder.decode(PHBlock.Wrapper.self, from: contents)
-			return wrapper.blocks
-		} catch {
-			throw phbar.Error("Failed to parse blocks file", underlyingError: error)
-		}
-	}
-}

Sources/phbar/Models/PHBlock/PHBlock+Refresh.swift

@@ -19,7 +19,7 @@ extension PHBlock {
 		stopAutoRefresh()
 
 		// Immediate refresh so the bar isn't blank until the first trigger fires.
-		scheduleUpdate()
+		resolve()
 
 		// 1. Periodic refresh.
 		if let interval = refresh, interval > 0 {
@@ -28,7 +28,7 @@ extension PHBlock {
 				while !Task.isCancelled {
 					try? await Task.sleep(for: .milliseconds(milliseconds))
 					if Task.isCancelled { break }
-					await self?.update()
+					await self?.resolve()
 				}
 			}
 		}
@@ -37,7 +37,7 @@ extension PHBlock {
 		//    system listener only while at least one block subscribes to it.
 		for event in (events ?? []) {
 			let subscription = registry.subscribe(event) { [weak self] in
-				self?.scheduleUpdate()
+				self?.resolve()
 			}
 			subscriptions.append(subscription)
 		}
@@ -50,80 +50,4 @@ extension PHBlock {
 		subscriptions.forEach { $0.cancel() }
 		subscriptions.removeAll()
 	}
-
-	/// Recompute the label from `command`. Used by the interval loop, event
-	/// handlers, and manual updates.
-	func update() async {
-		label = await compute()
-	}
-
-	/// Request an update on the main actor, coalescing rapid bursts into a single
-	/// recomputation.
-	private func scheduleUpdate() {
-		guard !updateScheduled else { return }
-		updateScheduled = true
-		Task { [weak self] in
-			defer { self?.updateScheduled = false }
-			await self?.update()
-		}
-	}
-
-	func handleGesture(_ event: PHGestureEvent) {
-		Task { label = await compute(with: event) }
-	}
-
-	/// Runs the provided command and returns its stdout.
-	///
-	/// Runs off the main actor so it can be awaited safely from SwiftUI views
-	/// without blocking the UI.
-	///
-	/// - Returns: A non-optional String to use as the block label.
-	func compute(with gestureEvent: PHGestureEvent? = nil) async -> String? {
-		guard kind == .text else { return nil }
-
-		let command = command
-		let environment = self.environment
-
-		let lines: [Substring]? = await Task.detached(priority: .userInitiated) {
-			let process = Process()
-			// Commands run with the resolved config root (see `PHPaths`) as their
-			// working directory, regardless of which block set they belong to, so
-			// relative paths in user scripts stay stable.
-			process.currentDirectoryURL = PHPaths.configDirectory
-			process.executableURL = URL(fileURLWithPath: "/bin/bash")
-			process.arguments = ["-c", command]
-
-			// Scripts inherit phbar's process environment with the `[env]` section
-			// overlaid, so user-defined variables and PATH extensions are visible.
-			process.environment = environment.variables
-			if let gestureEvent {
-				let type = gestureEvent.type.rawValue
-				process.environment?.updateValue(type, forKey: PHGestureEvent.typeKey)
-
-				if let data = gestureEvent.data {
-					process.environment?.updateValue(data, forKey: PHGestureEvent.infoKey)
-				}
-			}
-
-			// Capture stdout via a pipe (otherwise standardOutput is always nil).
-			let pipe = Pipe()
-			process.standardOutput = pipe
-
-			do {
-				try process.run()
-				process.waitUntilExit()
-				let data = pipe.fileHandleForReading.readDataToEndOfFile()
-				let string = String(data: data, encoding: .utf8)
-				guard let lines = string?.split(whereSeparator: \.isNewline) else { return nil }
-				return lines
-			} catch {
-				// Silently ignore failures
-				return nil
-			}
-		}.value
-
-		guard let lines else { return nil }
-		if self.debug { for line in lines { print(line) } }
-		return lines.last?.description
-	}
 }

Sources/phbar/Models/PHBlock/PHBlock+Resolve.swift

@@ -0,0 +1,118 @@
+import Foundation
+
+extension PHBlock {
+	/// Resolve the label by executing `command`.
+	/// Used by the interval loop, event handlers, and manual updates.
+	func resolve(merging environment: [String: String]? = nil) {
+		guard canResolve() else { return }
+
+		guard !resolveScheduled else { return }
+		resolveScheduled = true
+
+		Task(name: command, priority: .userInitiated) { [weak self] in
+			defer { self?.resolveScheduled = false }
+
+			do {
+				self?.label = try await self?.resolve(merging: environment)
+			} catch {
+				self?.printStandardError(error.localizedDescription)
+			}
+		}
+	}
+
+	/// Resolve the label by executing `command`.
+	/// Used by the interval loop, event handlers, and manual updates.
+	func resolve(merging environment: [String: String]? = nil) async {
+		guard canResolve() else { return }
+
+		do {
+			label = try await resolve(merging: environment)
+		} catch {
+			printStandardError(error.localizedDescription)
+		}
+	}
+
+	private func resolve(merging environment: [String: String]?) async throws -> String? {
+		let customEnvironment = environment
+
+		var environment = ProcessInfo.processInfo.environment
+		if let customEnvironment {
+			environment.merge(customEnvironment) { (_, new) in new }
+		}
+
+		return try await resolve(with: environment)
+	}
+
+	private func resolve(with environment: [String: String]) async throws -> String? {
+		do {
+			let (stdout, stderr) = try await resolve(command, with: environment)
+			printStandardError(stderr)
+			printStandardOutput(stdout)
+			guard let lines = stdout?.split(whereSeparator: \.isNewline),
+				let last = lines.last
+			else {
+				return nil
+			}
+			return String(last)
+		} catch {
+			throw error
+		}
+	}
+
+	private func canResolve() -> Bool {
+		guard kind == .text else { return false }
+
+		return true
+	}
+
+	private func resolve(_ command: String, with environment: [String: String]) async throws -> (
+		stdout: String?,
+		stderr: String?
+	) {
+		return try await withCheckedThrowingContinuation { continuation in
+			let process = Process()
+			let stdoutPipe = Pipe()
+			let stderrPipe = Pipe()
+
+			process.executableURL = URL(fileURLWithPath: "/bin/zsh")
+			process.currentDirectoryURL = PHPaths.configDirectory
+			process.environment = environment
+			process.arguments = ["-c", command]
+			process.standardOutput = stdoutPipe
+			process.standardError = stderrPipe
+
+			do {
+				try process.run()
+				process.waitUntilExit()
+
+				let stdoutData = stdoutPipe.fileHandleForReading.readDataToEndOfFile()
+				let stderrData = stderrPipe.fileHandleForReading.readDataToEndOfFile()
+
+				let stdout = String(data: stdoutData, encoding: .utf8)
+				let stderr = String(data: stderrData, encoding: .utf8)
+
+				continuation.resume(returning: (stdout, stderr))
+			} catch {
+				continuation.resume(throwing: error)
+			}
+		}
+	}
+
+	/// Print a message to standard output.
+	/// Silenced unless in debug mode.
+	///
+	/// - Parameter message: the content of the message
+	private func printStandardOutput(_ message: String?) {
+		guard debug, let data = message?.data(using: .utf8) else { return }
+		FileHandle.standardOutput.write(data)
+	}
+
+	/// Print a message to standard error.
+	/// Silenced unless in debug mode.
+	///
+	/// - Parameter message: the content of the message
+	private func printStandardError(_ message: String?) {
+		guard debug, let data = message?.data(using: .utf8) else { return }
+		FileHandle.standardError.write(data)
+	}
+}

Sources/phbar/Models/PHBlock/PHBlockKind.swift

@@ -1,10 +1,11 @@
 enum PHBlockKind: String {
-	case text, space
+	case text, space, divider
 }
 
 extension PHBlock {
 	var kind: PHBlockKind {
 		if name.starts(with: "_space") { return .space }
+		if name.starts(with: "_divider") { return .divider }
 		return .text
 	}
 }

Sources/phbar/Models/PHConfig.swift

@@ -1,12 +1,25 @@
 struct PHConfig: Decodable {
 	let theme: String
 	let window: String
-	let blocks: String?
-	let env: [String: String]?
+	let layout: String
 	let monitors: [String: PHConfigMonitorOverride]?
 
 	private enum CodingKeys: String, CodingKey {
-		case theme, window, blocks, env
+		case theme, window, layout
 		case monitors = "monitor"
 	}
+
+	var layouts: Set<String> {
+		var layouts = Set<String>()
+		layouts.insert(layout)
+
+		guard let monitors else { return layouts }
+		for monitor in monitors.values {
+			if let layout = monitor.layout {
+				layouts.insert(layout)
+			}
+		}
+
+		return layouts
+	}
 }

Sources/phbar/Models/PHConfig/PHConfig+Env.swift

@@ -1,18 +0,0 @@
-import Foundation
-
-extension PHConfig {
-	/// Return a copy with each `[env]` value expanded against `environment`
-	/// (defaulting to the process environment).
-	///
-	/// Unresolved references are left intact (see `PHEnvironment.expand`).
-	func resolvingEnv(in environment: PHEnvironment = .process) -> PHConfig {
-		guard let env, !env.isEmpty else { return self }
-		return PHConfig(
-			theme: theme,
-			window: window,
-			blocks: blocks,
-			env: env.mapValues(environment.expand),
-			monitors: monitors
-		)
-	}
-}

Sources/phbar/Models/PHConfig/PHConfig+Loading.swift

@@ -2,58 +2,41 @@ import Foundation
 import TOML
 
 extension PHConfig {
-	/// Load configuration from the resolved config directory
-	/// (see `PHPaths`). If the file doesn't exist or fails to parse, the
-	/// bundled default is used.
+	/// Load the configuration from the resolved config directory (see `PHPaths`).
+	/// If the file doesn't exist or fails to parse, the execution is interrupted.
 	static func load() throws -> PHConfig {
-		let url = PHPaths.configDirectory.appending(path: "config.toml")
+		let url = PHPaths.configFile
 
 		if FileManager.default.fileExists(atPath: url.relativePath) {
 			return try load(from: url)
 		} else {
-			return try loadFromBundle()
+			let config = url.lastPathComponent
+			throw PHBar.Error(
+				"""
+				Configuration file not found.
+				       Make sure to have a file named `\(config)` inside the
+				       directory: `\(PHPaths.configDirectory.relativePath)`
+
+				Tip: If you've never used phbar before, run the `phbar install` command
+				     to automatically generate the required configuration files.
+				"""
+			)
 		}
 	}
 
-	/// Load the bundled configuration.
-	/// If the file doesn't exist or fails to parse, the execution is interrupted.
-	static private func loadFromBundle() throws -> PHConfig {
-		guard
-			let defaultConfig = Bundle.module.url(
-				forResource: "config",
-				withExtension: "toml"
-			)?.resolvingSymlinksInPath()
-		else {
-			throw phbar.Error("Failed to load config file")
-		}
-		return try load(from: defaultConfig)
-	}
-
-	/// Decode configuration from a file at URL.
+	/// Load the configuration from the file at URL.
 	/// If the file doesn't exist or fails to parse, the execution is interrupted.
 	static private func load(from url: URL) throws -> PHConfig {
-		guard let data = try? Data(contentsOf: url),
-			let contents = String(data: data, encoding: .utf8)
-		else {
-			throw phbar.Error("Failed to load config file")
-		}
-
-		return try load(from: contents)
-	}
-
-	/// Decode configuration from a TOML string.
-	/// If the content fails to parse, the execution is interrupted.
-	static private func load(from contents: String) throws -> PHConfig {
 		do {
+			let data = try Data(contentsOf: url)
+			guard let contents = String(data: data, encoding: .utf8) else {
+				throw PHBar.Error("content is not UTF8 encoded.")
+			}
 			let decoder = TOMLDecoder()
-			let config = try decoder.decode(PHConfig.self, from: contents)
-			// Expand `$VAR` references in `[env]` values against the process
-			// environment (e.g. `PATH = "$PATH:/opt/homebrew/bin"`). Themes are
-			// decoded against the merged result later, so their `$VAR` references
-			// resolve the same set.
-			return config.resolvingEnv()
+			let configFile = contents.expanded(from: ProcessInfo.processInfo.environment)
+			return try decoder.decode(PHConfig.self, from: configFile)
 		} catch {
-			throw phbar.Error("Failed to parse config file", underlyingError: error)
+			throw PHBar.Error("Configuration file not readable", underlyingError: error)
 		}
 	}
 }

Sources/phbar/Models/PHConfig/PHConfigMonitorOverride.swift

@@ -3,25 +3,20 @@ import Foundation
 /// A per-monitor entry from the config's `[monitor]` table.
 ///
 /// Either field is optional; an unset field inherits the matching global
-/// (`theme`, `window`, or `blocks`) so a monitor can override just one of them.
+/// (`window` or `layout`) so a monitor can override just one of them.
 struct PHConfigMonitorOverride: Decodable {
-	let theme: String?
 	let window: String?
-	let blocks: String?
+	let layout: String?
 
-	init(theme: String? = nil, window: String? = nil, blocks: String? = nil) {
-		self.theme = theme
+	init(window: String? = nil, layout: String? = nil) {
 		self.window = window
-		self.blocks = blocks
+		self.layout = layout
 	}
 }
 
 extension PHConfig {
 	/// The per-monitor override matching the given screen identity, if any.
 	///
-	/// This is the single entry point for per-monitor resolution: the
-	/// `theme`/`window`/`blocks` helpers below all delegate to it. Kept free of
-	/// AppKit so the resolution logic is testable without an `NSScreen`.
 	/// Precedence: monitor name → monitor index.
 	func monitorOverride(screenName: String, screenIndex: Int?) -> PHConfigMonitorOverride? {
 		guard let monitors else { return nil }
@@ -30,21 +25,15 @@ extension PHConfig {
 		return nil
 	}
 
-	/// Theme name for a screen: the override's `theme` if set, otherwise the
-	/// global `theme`.
-	func theme(screenName: String, screenIndex: Int?) -> String {
-		monitorOverride(screenName: screenName, screenIndex: screenIndex)?.theme ?? theme
-	}
-
-	/// Window definition name for a screen: the override's `window` if set,
+	/// Window name for a screen: the override's `window` if set,
 	/// otherwise the global `window`.
 	func window(screenName: String, screenIndex: Int?) -> String {
 		monitorOverride(screenName: screenName, screenIndex: screenIndex)?.window ?? window
 	}
 
-	/// Block-set name for a screen: the override's `blocks` if set, otherwise
-	/// the global `blocks` (defaulting to `"default"`).
-	func blocks(screenName: String, screenIndex: Int?) -> String {
-		monitorOverride(screenName: screenName, screenIndex: screenIndex)?.blocks ?? (blocks ?? "default")
+	/// Layout name for a screen: the override's `layout` if set,
+	/// otherwise the global `layout`.
+	func layout(screenName: String, screenIndex: Int?) -> String {
+		monitorOverride(screenName: screenName, screenIndex: screenIndex)?.layout ?? layout
 	}
 }

Sources/phbar/Models/PHConfig/config.toml

@@ -1,37 +0,0 @@
-# Default window and block set for every monitor.
-#   - theme: a named theme at ~/.config/phbar/themes/<name>.toml
-#   - window: a [[window]] definition from the theme file
-#   - blocks: a named set at ~/.config/phbar/blocks/<name>.toml
-theme  = "default"
-window = "default"
-blocks = "default"
-
-# Optional: override the theme, window, and/or block set per monitor.
-#   - quoted numeric key → NSScreen index
-#   - string key         → NSScreen.localizedName (stable across replugs)
-# Precedence: monitor name → monitor index → the globals above.
-# Either field may be omitted to inherit its global value.
-#
-# [monitor."1"]
-# theme  = "default"
-# window = "bottom"
-# blocks = "laptop"
-#
-# [monitor."DELL U2723QE"]
-# theme  = "external"
-# window = "clock"
-# blocks = "external"
-
-# Optional: environment variables passed to block scripts when they run.
-#   - scripts always inherit phbar's own process environment (e.g. $PATH)
-#   - entries listed here take precedence, overriding any inherited value
-#     that shares the same name
-#   - `$VAR` / `${VAR}` references in a value expand against the inherited
-#     environment at load time, so you can extend variables (e.g.
-#     `PATH = "$PATH:/opt/homebrew/bin"`) or pull in colors/fonts used by a
-#     theme (e.g. `ACCENT = "#ff0000"`, then `color = "$ACCENT"` in the theme)
-#
-# [env]
-# TEST = "ciao"
-# TEST_2 = "hello world"
-# PATH = "$PATH:/opt/homebrew/bin"

Sources/phbar/Models/PHEnvironment.swift

@@ -1,76 +0,0 @@
-import Foundation
-
-/// A resolved set of environment variables with `$VAR` expansion support.
-///
-/// Two concerns meet here:
-///
-/// 1. **Scripts** — block commands run with these variables in their
-///    environment, built by layering the `[env]` section on top of phbar's own
-///    process environment (see `PHBlock.compute`).
-/// 2. **Config templating** — `@EnvExpanded` fields (e.g. theme colors, fonts)
-///    expand `$VAR` references against a `PHEnvironment` injected through
-///    `TOMLDecoder.userInfo` at decode time.
-///
-/// The environment is therefore resolved once (process → merged with `[env]`)
-/// and reused for both, so a variable defined in `[env]` is a single source of
-/// truth visible to scripts and themes alike.
-struct PHEnvironment: Sendable {
-	let variables: [String: String]
-
-	/// phbar's own process environment.
-	static let process = PHEnvironment(variables: ProcessInfo.processInfo.environment)
-
-	/// `CodingUserInfoKey` used to thread a `PHEnvironment` into `Decodable`
-	/// types (and the `@EnvExpanded` wrapper) without global state.
-	static let userInfoKey = CodingUserInfoKey(rawValue: "phbar.environment")!
-
-	/// Layer `overrides` (typically the `[env]` section) on top of this set.
-	/// Existing values with the same name are replaced.
-	func merging(_ overrides: [String: String]?) -> PHEnvironment {
-		guard let overrides, !overrides.isEmpty else { return self }
-		return PHEnvironment(variables: variables.merging(overrides) { _, override in override })
-	}
-
-	/// Expand `$VAR` and `${VAR}` references against `variables`.
-	///
-	/// Unresolved references are left intact rather than blanked, so a typo
-	/// stays visible (e.g. a literal `"$TYPO"` in a color) instead of silently
-	/// vanishing.
-	func expand(_ value: String) -> String {
-		var result = value
-
-		// `${VAR}` first, so the `$VAR` pass never sees its inner name.
-		result = result.replacing(/\$\{([A-Za-z_][A-Za-z0-9_]*)\}/) { match in
-			variables[String(match.1)] ?? String(match.0)
-		}
-		// `$VAR`
-		result = result.replacing(/\$([A-Za-z_][A-Za-z0-9_]*)/) { match in
-			variables[String(match.1)] ?? String(match.0)
-		}
-
-		return result
-	}
-}
-
-/// Opt-in property wrapper that expands `$VAR` / `${VAR}` references in a
-/// decoded string against the `PHEnvironment` carried in `decoder.userInfo`
-/// (falling back to the process environment when none is injected).
-///
-/// Apply only where config templating is wanted — never on `command`, whose
-/// `$`-references belong to the shell at run time, not to phbar at load time.
-@propertyWrapper
-struct EnvExpanded: Decodable, Equatable {
-	private let value: String
-
-	var wrappedValue: String { value }
-
-	init(wrappedValue: String) {
-		self.value = wrappedValue
-	}
-
-	init(from decoder: Decoder) throws {
-		let raw = try decoder.singleValueContainer().decode(String.self)
-		let environment = (decoder.userInfo[PHEnvironment.userInfoKey] as? PHEnvironment) ?? .process
-		self.value = environment.expand(raw)
-	}
-}

Sources/phbar/Models/PHLayout.swift

@@ -0,0 +1,7 @@
+struct PHLayout: Decodable {
+	let blocks: [PHBlock]
+
+	private enum CodingKeys: String, CodingKey {
+		case blocks = "block"
+	}
+}

Sources/phbar/Models/PHLayout/PHLayout+Loading.swift

@@ -0,0 +1,55 @@
+import Foundation
+import TOML
+
+extension PHLayout {
+	/// Load the specified layouts from the resolved config directory (see `PHPaths`).
+	/// If any of theme doesn't exist or fails to parse, the execution is interrupted.
+	static func load(_ layouts: Set<String>) throws -> [String: PHLayout] {
+		var dictionary = [String: PHLayout]()
+
+		for layout in layouts {
+			dictionary.updateValue(try load(layout), forKey: layout)
+		}
+
+		return dictionary
+	}
+
+	/// Load a layout from the resolved config directory (see `PHPaths`).
+	/// If the file doesn't exist or fails to parse, the execution is interrupted.
+	static func load(_ layout: String) throws -> PHLayout {
+		let url = PHPaths.layoutsDirectory.appending(path: "\(layout).toml")
+
+		if FileManager.default.fileExists(atPath: url.relativePath) {
+			return try load(from: url)
+		} else {
+			let layout = url.lastPathComponent
+			throw PHBar.Error(
+				"""
+				Layout file not found.
+				       Make sure to have a file named `\(layout)` inside the
+				       directory: `\(PHPaths.layoutsDirectory.relativePath)`
+
+				Tip: If you've never used phbar before, run `phbar generate config`
+				     to automatically generate the required configuration files.
+				"""
+			)
+		}
+	}
+
+	/// Load a layout from the file at URL.
+	/// If the file doesn't exist or fails to parse, the execution is interrupted.
+	static private func load(from url: URL) throws -> PHLayout {
+		do {
+			let data = try Data(contentsOf: url)
+			guard let contents = String(data: data, encoding: .utf8) else {
+				throw PHBar.Error("content is not UTF8 encoded.")
+			}
+			let decoder = TOMLDecoder()
+			let layoutFile = contents.expanded(from: ProcessInfo.processInfo.environment)
+			return try decoder.decode(PHLayout.self, from: layoutFile)
+		} catch {
+			let layout = url.lastPathComponent
+			throw PHBar.Error("Layout file `\(layout)` not readable", underlyingError: error)
+		}
+	}
+}

Sources/phbar/Models/PHPaths.swift

@@ -16,6 +16,21 @@ enum PHPaths {
 	/// The resolved configuration directory (computed once, cached).
 	static let configDirectory: URL = resolveConfigDirectory()
 
+	/// The resolved config file (computed once, cached).
+	static let configFile: URL = {
+		configDirectory.appending(path: "config.toml")
+	}()
+
+	/// The resolved themes directory (computed once, cached).
+	static let themesDirectory: URL = {
+		configDirectory.appending(path: "themes")
+	}()
+
+	/// The resolved layouts directory (computed once, cached).
+	static let layoutsDirectory: URL = {
+		configDirectory.appending(path: "layouts")
+	}()
+
 	/// Ordered candidate directories, priority high → low.
 	///
 	/// - Parameter environment: Override the environment lookup (used by tests);

Sources/phbar/Models/PHTheme/PHTheme+Loading.swift

@@ -2,60 +2,42 @@ import Foundation
 import TOML
 
 extension PHTheme {
-	/// Load theme from the resolved config directory (`PHPaths`/themes).
-	/// Falls back to the bundled theme when the file is absent or parsing fails.
-	///
-	/// - Parameter environment: Used to expand `$VAR` references in `@EnvExpanded`
-	///   fields (colors, fonts); defaults to the process environment.
-	static func load(_ theme: String?, environment: PHEnvironment = .process) throws -> PHTheme {
-		guard let theme else { return try loadFromBundle() }
-
-		let url = PHPaths.configDirectory.appending(path: "themes").appending(path: "\(theme).toml")
+	/// Load a theme from the resolved config directory (see `PHPaths`).
+	/// If the file doesn't exist or fails to parse, the execution is interrupted.
+	static func load(_ theme: String) throws -> PHTheme {
+		let url = PHPaths.themesDirectory.appending(path: "\(theme).toml")
 
 		if FileManager.default.fileExists(atPath: url.relativePath) {
-			return try load(from: url, environment: environment)
+			return try load(from: url)
 		} else {
-			return try loadFromBundle()
+			let theme = url.lastPathComponent
+			throw PHBar.Error(
+				"""
+				Theme file not found.
+				       Make sure to have a file named `\(theme)` inside the
+				       directory: `\(PHPaths.themesDirectory.relativePath)`
+
+				Tip: If you've never used phbar before, run the `phbar install` command
+				     to automatically generate the required configuration files.
+				"""
+			)
 		}
 	}
 
-	/// Load the bundled theme.
+	/// Load a theme from the file at URL.
 	/// If the file doesn't exist or fails to parse, the execution is interrupted.
-	static private func loadFromBundle() throws -> PHTheme {
-		guard
-			let defaultConfig = Bundle.module.url(
-				forResource: "theme",
-				withExtension: "toml"
-			)?.resolvingSymlinksInPath()
-		else {
-			throw phbar.Error("Failed to load theme file")
-		}
-		return try load(from: defaultConfig, environment: .process)
-	}
-
-	/// Load theme from a file at URL.
-	/// If the file doesn't exist or fails to parse, the execution is interrupted.
-	static private func load(from url: URL, environment: PHEnvironment) throws -> PHTheme {
+	static private func load(from url: URL) throws -> PHTheme {
 		do {
 			let data = try Data(contentsOf: url)
-			guard let contents = String(data: data, encoding: .utf8), !contents.isEmpty else {
-				throw phbar.Error("the file is empty")
+			guard let contents = String(data: data, encoding: .utf8) else {
+				throw PHBar.Error("content is not UTF8 encoded.")
 			}
-			return try load(from: contents, environment: environment)
-		} catch {
-			throw phbar.Error("Failed to load theme file", underlyingError: error)
-		}
-	}
-
-	/// Load theme from a TOML string.
-	/// If the content fails to parse, the execution is interrupted.
-	static private func load(from contents: String, environment: PHEnvironment) throws -> PHTheme {
-		do {
 			let decoder = TOMLDecoder()
-			decoder.userInfo[PHEnvironment.userInfoKey] = environment
-			return try decoder.decode(PHTheme.self, from: contents)
+			let themeFile = contents.expanded(from: ProcessInfo.processInfo.environment)
+			return try decoder.decode(PHTheme.self, from: themeFile)
 		} catch {
-			throw phbar.Error("Failed to parse theme file", underlyingError: error)
+			let theme = url.lastPathComponent
+			throw PHBar.Error("Theme file `\(theme)` not readable", underlyingError: error)
 		}
 	}
 }

Sources/phbar/Models/PHTheme/PHThemeStyle.swift

@@ -10,7 +10,7 @@ struct PHThemeStyle: Decodable {
 			name: "_default",
 			foreground: .init(color: "#000000", alpha: nil),
 			background: .init(color: "#ffffff", alpha: nil),
-			padding: .init(leading: 12, trailing: 12),
+			padding: .init(top: 0, bottom: 0, leading: 12, trailing: 12),
 			corner: nil
 		)
 	}()

Sources/phbar/Models/PHTheme/PHThemeStyle/PHThemeStyleColor.swift

@@ -3,7 +3,7 @@ import SwiftUI
 struct PHThemeStyleColor: Decodable, ShapeStyle {
 	typealias Resolved = SwiftUI.Color
 
-	@EnvExpanded var color: String
+	var color: String
 	let alpha: Double?
 
 	var uiColor: SwiftUI.Color {

Sources/phbar/Models/PHTheme/PHThemeStyle/PHThemeStylePadding.swift

@@ -1,8 +1,12 @@
 struct PHThemeStylePadding: Decodable {
+	let top: Double?
+	let bottom: Double?
 	let leading: Double?
 	let trailing: Double?
 
 	private enum CodingKeys: String, CodingKey {
+		case top
+		case bottom
 		case leading = "left"
 		case trailing = "right"
 	}

Sources/phbar/Models/PHTheme/PHThemeText.swift

@@ -3,7 +3,7 @@ import SwiftUI
 
 struct PHThemeText: Decodable {
 	let name: String
-	@EnvExpanded var fontFamily: String
+	var fontFamily: String
 	let size: Double
 	let weight: PHThemeTextWeight
 	let style: PHThemeTextStyle

Sources/phbar/PHBar.swift

@@ -8,21 +8,42 @@ import ArgumentParser
 import Foundation
 
 @main
-struct phbar: ParsableCommand {
+struct PHBar: ParsableCommand {
 	static let configuration = CommandConfiguration(
 		commandName: "phbar",
 		abstract: "Modular status bar for macOS.",
 		discussion: """
-			pmenu reads a list of newline-separated items from stdin and presents them to the user.
-			When the user selects an item and presses Return, their choice is printed to stdout and pmenu terminates.
-			Entering text will narrow the items to those matching the tokens in the input.
+			phbar renders a status bar on every visible monitor. Each status bar
+			is dynamically built from the given theme, window configuration,
+			and block set. Thanks to the modularity of phbar, each one of these
+			elements can be overwritten for any given monitor.
+
+			phbar relies on blocks to determine what is visible on a bar and how
+			it should look. Everything in phbar is a block, not just texts but
+			also spaces and dividers. Each block can have a different visual style,
+			refresh conditions, and content source. The content of a block, if any,
+			is computed by calling a shell script, giving you the maximum flexibility.
+
+			Run `phbar install` to create the required config directory filled with
+			a template to start with. The directory will be created in one of these
+			locations in order of priority: $XDG_CONFIG_HOME/phbar, ~/.config/phbar,
+			or ~/.phbar.
+
+			Edit `<config-directory>/blocks/default.toml` to customize the block set used
+			by default and `<config-directory>/themes/default.toml` to customize the look
+			and feel of the bar. Check out the full documentation to learn more about all
+			the possible customisations.
+
+			Run `phbar start` to launch the bar and verify the appearance and behaviour.
+			Once you're ready to go to production, you can create a launch agent that uses
+			the same command to start the bar automatically at login.
 			""",
 		version: "1.0.0",
-		subcommands: [start.self]
+		subcommands: [Start.self, Install.self]
 	)
 }
 
-extension phbar {
+extension PHBar {
 	struct Error: LocalizedError {
 		let message: String
 		let underlyingError: Swift.Error?

Sources/phbar/Views/BarController.swift

@@ -16,17 +16,16 @@ final class BarController: ObservableObject {
 		blocks.filter { $0.centered == true }
 	}
 
-	init(config: PHConfig, screen: NSScreen, theme: PHTheme, blocks: [PHBlock], environment: PHEnvironment = .process, debug: Bool) {
+	init(config: PHConfig, screen: NSScreen, theme: PHTheme, layout: PHLayout, debug: Bool) {
 		self.config = config
 		self.screen = screen
 		self.theme = theme
 		self.window = Self.window(for: config, screen: screen, from: theme)
-		self.blocks = blocks
+		self.blocks = layout.blocks
 
 		for block in blocks {
 			block.text = text(for: block)
 			block.style = style(for: block)
-			block.environment = environment
 			block.debug = debug
 		}
 	}
@@ -101,7 +100,7 @@ extension BarController {
 	/// Each block updates concurrently; the view refreshes as results arrive.
 	func refresh() {
 		for block in blocks {
-			Task { await block.update() }
+			block.resolve()
 		}
 	}
 }

Sources/phbar/Views/BarView.swift

@@ -13,9 +13,11 @@ struct BarView: View {
 				ForEach(bar.arrangedBlocks) { block in
 					switch block.kind {
 					case .text:
-						TextBlockView(block: block)
+						TextView(block: block)
 					case .space:
-						SpaceBlockView(block: block)
+						SpaceView(block: block)
+					case .divider:
+						DividerView(block: block)
 					}
 				}
 			}
@@ -24,9 +26,11 @@ struct BarView: View {
 				ForEach(bar.centeredBlocks) { block in
 					switch block.kind {
 					case .text:
-						TextBlockView(block: block)
+						TextView(block: block)
 					case .space:
-						SpaceBlockView(block: block)
+						SpaceView(block: block)
+					case .divider:
+						DividerView(block: block)
 					}
 				}
 			}

Sources/phbar/Views/DividerView.swift

@@ -0,0 +1,35 @@
+import SwiftUI
+
+struct DividerView: View {
+	@ObservedObject var block: PHBlock
+
+	var width: CGFloat {
+		guard let arg = block.name.split(separator: " ").last else { return 1 }
+		guard let width = Double(arg) else { return 1 }
+		return CGFloat(width)
+	}
+
+	var body: some View {
+		ZStack {
+			Rectangle()
+				.foregroundStyle(block.style.background?.uiColor ?? .clear)
+
+			Group {
+				if let corner = block.style.corner {
+					RoundedRectangle(cornerRadius: corner.radius, style: corner.style)
+				} else {
+					Rectangle()
+				}
+			}
+			.foregroundStyle(block.style.foreground?.uiColor ?? .clear)
+			.frame(width: width)
+			.padding(.trailing, block.style.padding?.trailing ?? 0)
+			.padding(.leading, block.style.padding?.leading ?? 0)
+			.padding(.top, block.style.padding?.top ?? 0)
+			.padding(.bottom, block.style.padding?.bottom ?? 0)
+			.border(block.debug ? .blue : .clear)
+		}
+		.fixedSize(horizontal: true, vertical: false)
+		.border(block.debug ? .red : .clear)
+	}
+}

Sources/phbar/Views/SpaceView.swift

@@ -1,6 +1,6 @@
 import SwiftUI
 
-struct SpaceBlockView: View {
+struct SpaceView: View {
 	@ObservedObject var block: PHBlock
 
 	var width: CGFloat? {

Sources/phbar/Views/TextView.swift

@@ -1,6 +1,6 @@
 import SwiftUI
 
-struct TextBlockView: View {
+struct TextView: View {
 	@EnvironmentObject private var bar: BarController
 	@ObservedObject var block: PHBlock
 
@@ -33,6 +33,8 @@ struct TextBlockView: View {
 				}
 				.padding(.trailing, block.style.padding?.trailing ?? 0)
 				.padding(.leading, block.style.padding?.leading ?? 0)
+				.padding(.top, block.style.padding?.top ?? 0)
+				.padding(.bottom, block.style.padding?.bottom ?? 0)
 			}
 			.fixedSize(horizontal: true, vertical: false)
 			.border(block.debug ? .red : .clear)
@@ -45,7 +47,7 @@ struct TextBlockView: View {
 					.scrollWheel,
 				]) { event in
 					if hovering, let gestureEvent = PHGestureEvent.from(event) {
-						block.handleGesture(gestureEvent)
+						block.resolve(with: gestureEvent)
 					}
 					return event
 				}

Sources/phbar/config/config.toml

@@ -0,0 +1,21 @@
+# Default window and block set for every monitor.
+#   - theme: a named theme at ~/.config/phbar/themes/<name>.toml
+#   - window: a [[window]] definition from the theme file
+#   - layout: a named layout at ~/.config/phbar/layouts/<name>.toml
+theme  = "default"
+window = "default"
+layout = "default"
+
+# Optional: override the window and/or layout per monitor.
+#   - quoted numeric key → NSScreen index
+#   - string key         → NSScreen.localizedName (stable across replugs)
+# Precedence: monitor name → monitor index → the globals above.
+# Either field may be omitted to inherit its global value.
+#
+# [monitor."1"]
+# window = "bottom"
+# layout = "laptop"
+#
+# [monitor."DELL U2723QE"]
+# window = "clock"
+# layout = "external"

Sources/phbar/config/layouts/default.toml

@@ -0,0 +1,31 @@
+[[block]]
+name  = "version"
+style = "elevated"
+
+[[block]]
+name = "_space 14"
+
+[[block]]
+name    = "attribution"
+command = 'echo "by Panini House"'
+text    = "italic"
+
+[[block]]
+name = "_space"
+
+[[block]]
+name = "gesture"
+
+[[block]]
+name = "_space 14"
+
+[[block]]
+name    = "clock"
+refresh = 1
+style   = "elevated"
+
+[[block]]
+name     = "greetings"
+command  = 'echo "􀟱 Hi $USER", welcome to phbar!'
+text     = "italic"
+centered = true

Sources/phbar/config/scripts/clock

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "􀐬 $(date "+%a %d, %H:%M:%S")"

Sources/phbar/config/scripts/gesture

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+text="Click me"
+
+case $GESTURE in
+	"left_mouse_down") text="That's left mouse button!" ;;
+	"right_mouse_down") text="That's right mouse button!" ;;
+	"other_mouse_down") text="That's mouse button $GESTURE_INFO!" ;;
+	"scroll_wheel") text="Yes, you can even scroll!" ;;
+esac
+
+echo "􀭆 $text"

Sources/phbar/config/scripts/version

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "phbar v$(phbar --version)"

Sources/phbar/config/themes/default.toml

@@ -8,39 +8,29 @@ anchor = "top"
 height = 30
 width  = "100%"
 
-[[window]]
-name   = "bottom"
-anchor = "bottom"
-height = 30
-width  = "100%"
-
 [[text]]
 name   = "default"
-font   = "Comic Code"
+font   = "monospace"
 size   = 14
 weight = "regular"
 style  = "normal"
-offset = -0.5
+offset = -1
 
 [[text]]
 name   = "italic"
-font   = "Comic Code"
+font   = "monospace"
 size   = 14
 weight = "regular"
 style  = "italic"
-offset = -0.5
+offset = -1
 
 [[style]]
 name       = "default"
 foreground = { color = "#aed3f3" }
-background = { color = "#010408", alpha = 0.825 }
+background = { color = "#010408" }
 
 [[style]]
-name       = "floating"
-foreground = { color = "#aed3f3" }
-
-[[style]]
-name       = "tinted"
+name       = "elevated"
 foreground = { color = "#aed3f3" }
 background = { color = "#0f304a" }
 padding    = { left = 12.0, right = 12.0 }

Tests/phbarTests/BarControllerTests.swift

@@ -7,7 +7,7 @@ import Testing
 // MARK: - Refresh command
 
 @Test func refreshCommandConfigurationIsCorrect() async throws {
-	let config = phbar.refresh.configuration
+	let config = PHBar.Refresh.configuration
 	#expect(config.commandName == "refresh")
 	#expect(config.abstract == "Refresh the running status bar.")
 }

Tests/phbarTests/PHConfigTests.swift

@@ -28,19 +28,19 @@ private func makeConfig(
 }
 
 @Test func windowMatchesByIndex() {
-	let config = makeConfig(monitors: ["1": .init(window: "bottom", blocks: nil)])
+	let config = makeConfig(monitors: ["1": .init(window: "bottom", layout: nil)])
 	#expect(config.window(screenName: "Whatever", screenIndex: 1) == "bottom")
 }
 
 @Test func windowMatchesByName() {
-	let config = makeConfig(monitors: ["DELL U2723QE": .init(window: "clock", blocks: nil)])
+	let config = makeConfig(monitors: ["DELL U2723QE": .init(window: "clock", layout: nil)])
 	#expect(config.window(screenName: "DELL U2723QE", screenIndex: 0) == "clock")
 }
 
 @Test func windowPrefersNameOverIndex() {
 	let config = makeConfig(monitors: [
-		"0": .init(window: "byIndex", blocks: nil),
-		"DELL": .init(window: "byName", blocks: nil),
+		"0": .init(window: "byIndex", layout: nil),
+		"DELL": .init(window: "byName", layout: nil),
 	])
 	#expect(config.window(screenName: "DELL", screenIndex: 0) == "byName")
 }
@@ -48,17 +48,17 @@ private func makeConfig(
 // MARK: blocks
 
 @Test func blocksDefaultsToDefault() {
-	#expect(makeConfig().blocks(screenName: "S", screenIndex: 0) == "default")
+	#expect(makeConfig().layout(screenName: "S", screenIndex: 0) == "default")
 }
 
 @Test func blocksUsesGlobalWhenNoOverride() {
 	let config = makeConfig(blocks: "main")
-	#expect(config.blocks(screenName: "S", screenIndex: 0) == "main")
+	#expect(config.layout(screenName: "S", screenIndex: 0) == "main")
 }
 
 @Test func blocksOverrideBeatsGlobal() {
-	let config = makeConfig(blocks: "main", monitors: ["1": .init(window: nil, blocks: "alt")])
-	#expect(config.blocks(screenName: "S", screenIndex: 1) == "alt")
+	let config = makeConfig(blocks: "main", monitors: ["1": .init(window: nil, layout: "alt")])
+	#expect(config.layout(screenName: "S", screenIndex: 1) == "alt")
 }
 
 // MARK: theme
@@ -77,10 +77,10 @@ private func makeConfig(
 
 @Test func overrideInheritsUnsetFieldsFromGlobal() {
 	// An override that sets only `blocks` still inherits the global window/theme.
-	let config = makeConfig(theme: "voltage", window: "top", monitors: ["1": .init(window: nil, blocks: "laptop")])
+	let config = makeConfig(theme: "voltage", window: "top", monitors: ["1": .init(window: nil, layout: "laptop")])
 	#expect(config.theme(screenName: "S", screenIndex: 1) == "voltage")
 	#expect(config.window(screenName: "S", screenIndex: 1) == "top")
-	#expect(config.blocks(screenName: "S", screenIndex: 1) == "laptop")
+	#expect(config.layout(screenName: "S", screenIndex: 1) == "laptop")
 }
 
 @Test func themeWindowAndBlocksResolveIndependently() {
@@ -107,6 +107,6 @@ private func makeConfig(
 }
 
 @Test func monitorOverrideReturnsNilForUnmatchedScreen() {
-	let config = makeConfig(monitors: ["DELL": .init(window: "clock", blocks: nil)])
+	let config = makeConfig(monitors: ["DELL": .init(window: "clock", layout: nil)])
 	#expect(config.monitorOverride(screenName: "Unknown", screenIndex: 99) == nil)
 }

Tests/phbarTests/PHEnvironmentTests.swift

@@ -1,147 +0,0 @@
-import Foundation
-import Testing
-import TOML
-
-@testable import phbar
-
-// MARK: - expand
-
-@Test func envExpandDollarBraceForm() {
-	let env = PHEnvironment(variables: ["ACCENT": "#ff0000"])
-	#expect(env.expand("${ACCENT}") == "#ff0000")
-}
-
-@Test func envExpandDollarForm() {
-	let env = PHEnvironment(variables: ["FOO": "bar"])
-	#expect(env.expand("$FOO") == "bar")
-}
-
-@Test func envExpandsEmbeddedReferences() {
-	let env = PHEnvironment(variables: ["HOME": "/Users/tom", "BIN": "/opt/bin"])
-	#expect(env.expand("$HOME/bin:${BIN}/extra") == "/Users/tom/bin:/opt/bin/extra")
-}
-
-@Test func envExpandLeavesUnresolvedIntact() {
-	// Unresolved references stay literal instead of being blanked, so a typo
-	// remains visible.
-	let env = PHEnvironment(variables: [:])
-	#expect(env.expand("$MISSING and ${ALSO_MISSING}") == "$MISSING and ${ALSO_MISSING}")
-}
-
-@Test func envExpandIgnoresNonIdentifierDollar() {
-	let env = PHEnvironment(variables: ["FOO": "bar"])
-	// A `$` not followed by an identifier name is left untouched.
-	#expect(env.expand("cost: $5 and $FOO") == "cost: $5 and bar")
-}
-
-// MARK: - merging
-
-@Test func envMergingOverridesExistingKeys() {
-	let env = PHEnvironment(variables: ["PATH": "/usr/bin", "HOME": "/u"])
-	let merged = env.merging(["PATH": "/usr/bin:/extra"])
-	#expect(merged.variables["PATH"] == "/usr/bin:/extra")
-	#expect(merged.variables["HOME"] == "/u")
-}
-
-@Test func envMergingNilReturnsSameVariables() {
-	let env = PHEnvironment(variables: ["A": "1"])
-	#expect(env.merging(nil).variables == ["A": "1"])
-}
-
-// MARK: - [env] value expansion (config load)
-
-private func makeConfig(env: [String: String]?) -> PHConfig {
-	PHConfig(theme: "default", window: "default", blocks: nil, env: env, monitors: nil)
-}
-
-@Test func resolvingEnvExpandsValuesAgainstGivenEnvironment() {
-	// `PATH = "$PATH:/extra"` extends an inherited variable.
-	let config = makeConfig(env: [
-		"PATH": "$PATH:/opt/phbar/bin",
-		"WORKDIR": "${TMPDIR}/phbar",
-		"PLAIN": "literal",
-	])
-	let resolved = config.resolvingEnv(in: PHEnvironment(variables: [
-		"PATH": "/usr/bin",
-		"TMPDIR": "/var/tmp",
-	]))
-
-	#expect(resolved.env?["PATH"] == "/usr/bin:/opt/phbar/bin")
-	#expect(resolved.env?["WORKDIR"] == "/var/tmp/phbar")
-	#expect(resolved.env?["PLAIN"] == "literal")
-}
-
-@Test func resolvingEnvDefaultsToProcessEnvironment() {
-	// `$TMPDIR` is set in phbar's launch environment, so this also exercises
-	// real process-env expansion end to end.
-	guard let tmpdir = ProcessInfo.processInfo.environment["TMPDIR"] else { return }
-	let config = makeConfig(env: ["OUT": "$TMPDIR"])
-	let resolved = config.resolvingEnv()
-	#expect(resolved.env?["OUT"] == tmpdir)
-}
-
-@Test func resolvingEnvLeavesConfigUntouchedWhenEnvAbsent() {
-	let config = makeConfig(env: nil)
-	#expect(config.resolvingEnv(in: .process).env == nil)
-}
-
-// MARK: - @EnvExpanded wrapper
-
-/// Stand-in Decodable that mirrors how a theme field opts into expansion.
-private struct Color: Decodable {
-	@EnvExpanded var hex: String
-}
-
-@Test func envExpandedResolvesAgainstInjectedEnvironment() throws {
-	let decoder = TOMLDecoder()
-	decoder.userInfo[PHEnvironment.userInfoKey] = PHEnvironment(variables: ["ACCENT": "#ff0000"])
-
-	let color = try decoder.decode(Color.self, from: #"hex = "$ACCENT""#)
-
-	#expect(color.hex == "#ff0000")
-}
-
-@Test func envExpandedFallsBackToLaunchEnvironment() throws {
-	// Without injected userInfo the wrapper falls back to phbar's launch
-	// environment (`ProcessInfo`), which is a snapshot taken at process start.
-	guard let path = ProcessInfo.processInfo.environment["PATH"] else { return }
-
-	let color = try TOMLDecoder().decode(Color.self, from: #"hex = "$PATH""#)
-
-	#expect(color.hex == path)
-}
-
-@Test func envExpandedLeavesUnresolvedIntact() throws {
-	let color = try TOMLDecoder().decode(Color.self, from: #"hex = "$NEVER_SET""#)
-
-	#expect(color.hex == "$NEVER_SET")
-}
-
-// MARK: - Theme integration
-
-@Test func themeStyleColorExpandsEnvReference() throws {
-	let decoder = TOMLDecoder()
-	decoder.userInfo[PHEnvironment.userInfoKey] = PHEnvironment(variables: ["ACCENT": "#ff0000"])
-
-	let style = try decoder.decode(PHThemeStyleColor.self, from: #"color = "$ACCENT""#)
-
-	#expect(style.color == "#ff0000")
-}
-
-@Test func themeTextFontExpandsEnvReference() throws {
-	let decoder = TOMLDecoder()
-	decoder.userInfo[PHEnvironment.userInfoKey] = PHEnvironment(variables: ["FONT": "Comic Code"])
-
-	let text = try decoder.decode(
-		PHThemeText.self,
-		from: """
-		name   = "default"
-		font   = "$FONT"
-		size   = 14
-		weight = "regular"
-		style  = "normal"
-		"""
-	)
-
-	#expect(text.fontFamily == "Comic Code")
-}