chore: drop runner shim and add committer helper

Swabble/Sources/SwabbleCore/Hooks/HookExecutor.swift

@@ -0,0 +1,75 @@
+import Foundation
+
+public struct HookJob: Sendable {
+    public let text: String
+    public let timestamp: Date
+
+    public init(text: String, timestamp: Date) {
+        self.text = text
+        self.timestamp = timestamp
+    }
+}
+
+public actor HookExecutor {
+    private let config: SwabbleConfig
+    private var lastRun: Date?
+    private let hostname: String
+
+    public init(config: SwabbleConfig) {
+        self.config = config
+        hostname = Host.current().localizedName ?? "host"
+    }
+
+    public func shouldRun() -> Bool {
+        guard config.hook.cooldownSeconds > 0 else { return true }
+        if let lastRun, Date().timeIntervalSince(lastRun) < config.hook.cooldownSeconds {
+            return false
+        }
+        return true
+    }
+
+    public func run(job: HookJob) async throws {
+        guard shouldRun() else { return }
+        guard !config.hook.command.isEmpty else { throw NSError(
+            domain: "Hook",
+            code: 1,
+            userInfo: [NSLocalizedDescriptionKey: "hook command not set"]) }
+
+        let prefix = config.hook.prefix.replacingOccurrences(of: "${hostname}", with: hostname)
+        let payload = prefix + job.text
+
+        let process = Process()
+        process.executableURL = URL(fileURLWithPath: config.hook.command)
+        process.arguments = config.hook.args + [payload]
+
+        var env = ProcessInfo.processInfo.environment
+        env["SWABBLE_TEXT"] = job.text
+        env["SWABBLE_PREFIX"] = prefix
+        for (k, v) in config.hook.env {
+            env[k] = v
+        }
+        process.environment = env
+
+        let pipe = Pipe()
+        process.standardOutput = pipe
+        process.standardError = pipe
+
+        try process.run()
+
+        let timeoutNanos = UInt64(max(config.hook.timeoutSeconds, 0.1) * 1_000_000_000)
+        try await withThrowingTaskGroup(of: Void.self) { group in
+            group.addTask {
+                process.waitUntilExit()
+            }
+            group.addTask {
+                try await Task.sleep(nanoseconds: timeoutNanos)
+                if process.isRunning {
+                    process.terminate()
+                }
+            }
+            try await group.next()
+            group.cancelAll()
+        }
+        lastRun = Date()
+    }
+}