Add taskrunner2 macro

devtools/taskrunner2/BUILD.bazel

@@ -1,6 +1,8 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
 load("@aspect_bazel_lib//lib:copy_to_bin.bzl", "copy_to_bin")
 
+exports_files(["runner.sh"])
+
 go_library(
     name = "taskrunner2_lib",
     srcs = ["main.go"],

devtools/taskrunner2/defs.bzl

@@ -0,0 +1,29 @@
+def taskrunner2(name, targets = [], watch_targets = []):
+    args = []
+
+    for target in targets:
+        args.append("-t")
+        args.append(target)
+
+    for target in watch_targets:
+        args.append("-w")
+        args.append(target)
+
+    # generate args output
+    native.genrule(
+        name = name + "_args",
+        outs = ["args"],
+        cmd = "echo " + " ".join(args) + " > $@",
+        visibility = ["//visibility:private"],
+    )
+
+    native.sh_binary(
+        name = name,
+        srcs = [
+            "//devtools/taskrunner2:runner.sh",
+        ],
+        data = [
+            "//devtools/taskrunner2",
+            ":" + name + "_args",
+        ],
+    )

devtools/taskrunner2/runner.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+ARGS_PATH="$(find . -name "args")"
+devtools/taskrunner2/taskrunner2_/taskrunner2 $(cat "${ARGS_PATH}")

tools/mothership/BUILD.bazel

@@ -0,0 +1,9 @@
+load("//devtools/taskrunner2:defs.bzl", "taskrunner2")
+
+taskrunner2(
+    name = "mothership",
+    watch_targets = [
+        "//tools/mothership/cmd/mship_api",
+        "//tools/mothership/ui",
+    ],
+)