Symlink test utils

examples/README.md

@@ -1,3 +0,0 @@
-```
-bazel test //... --@rules_python//python/config_settings:python_version=3.10
-```

examples/chatter/BUILD.bazel

@@ -18,6 +18,7 @@ load(
 load("@rules_ros//ros:launch.bzl", "ros_launch")
 load("@rules_ros//ros:test.bzl", "ros_test")
 load("@rules_ros//ros:topic.bzl", "ros_topic")
+load("@rules_ros//third_party:expand_template.bzl", "expand_template")
 
 # Handling of ROS messages & services resembles to some extent Bazel's rules for
 # handling protobuf messages (e.g. proto_library and cc_proto_library).
@@ -58,14 +59,28 @@ cc_ros_binary(
 # Defines tests for the talker node.
 ros_test(
     name = "talker_tests",
-    launch_file = "talker_tests.launch",
+    launch_file = ":talker_tests.launch",
     nodes = [
         ":talker",
         "@rules_ros//third_party/ros/rostest:advertisetest",
         "@rules_ros//third_party/ros/rostest:publishtest",
     ],
 )
 
+expand_template(
+    name = "talker_tests_launch",
+    out = "talker_tests.launch",
+    data = [
+        "@rules_ros//third_party/ros/rostest:advertisetest",
+        "@rules_ros//third_party/ros/rostest:publishtest",
+    ],
+    substitutions = {
+        "{advertisetest}": "$(rootpath @rules_ros//third_party/ros/rostest:advertisetest)",
+        "{publishtest}": "$(rootpath @rules_ros//third_party/ros/rostest:publishtest)",
+    },
+    template = "talker_tests.launch.tpl",
+)
+
 # Defines a C++ listener ROS node.
 cc_ros_binary(
     name = "listener",

examples/chatter/talker_tests.launch → examples/chatter/talker_tests.launch.tpl

@@ -3,7 +3,7 @@
 
   <test name="advertisetest"
       test-name="advertisetest"
-      type="../rules_ros~/third_party/ros/rostest/advertisetest">
+      type="{advertisetest}">
     <rosparam>
       topics:
         - name: /chatter
@@ -14,7 +14,7 @@
 
   <test name="publishtest"
         test-name="publishtest"
-        type="../rules_ros~/third_party/ros/rostest/publishtest">
+        type="{publishtest}">
     <rosparam>
       topics:
         - name: /chatter

third_party/BUILD.bazel

@@ -1,3 +1,4 @@
 exports_files([
     "expand_template.bzl",
+    "symlink.bzl",
 ])

third_party/ros/rostest/BUILD.bazel

@@ -1,5 +1,6 @@
 load("@rules_python//python:defs.bzl", "py_binary", "py_library")
 load("//build_tools:pylint.bzl", "pylint")
+load("//third_party:symlink.bzl", "symlink")
 
 py_library(
     name = "rostest",
@@ -19,38 +20,62 @@ py_library(
 )
 
 py_binary(
-    name = "advertisetest",
+    name = "advertisetest_impl",
     srcs = ["advertisetest.py"],
-    visibility = ["//visibility:public"],
+    main = "advertisetest.py",
     deps = [
         ":rostest",
         "@rules_ros//third_party/ros/rosservice",
     ],
 )
 
+symlink(
+    name = "advertisetest",
+    executable = ":advertisetest_impl",
+    visibility = ["//visibility:public"],
+)
+
 py_binary(
-    name = "hztest",
+    name = "hztest_impl",
     srcs = ["hztest.py"],
-    visibility = ["//visibility:public"],
+    main = "hztest.py",
     deps = [
         ":rostest",
     ],
 )
 
+symlink(
+    name = "hztest",
+    executable = ":hztest_impl",
+    visibility = ["//visibility:public"],
+)
+
 py_binary(
-    name = "paramtest",
+    name = "paramtest_impl",
     srcs = ["paramtest.py"],
-    visibility = ["//visibility:public"],
+    main = "paramtest.py",
     deps = [
         ":rostest",
     ],
 )
 
+symlink(
+    name = "paramtest",
+    executable = ":paramtest_impl",
+    visibility = ["//visibility:public"],
+)
+
 py_binary(
-    name = "publishtest",
+    name = "publishtest_impl",
     srcs = ["publishtest.py"],
-    visibility = ["//visibility:public"],
+    main = "publishtest.py",
     deps = [":rostest"],
 )
 
+symlink(
+    name = "publishtest",
+    executable = ":publishtest_impl",
+    visibility = ["//visibility:public"],
+)
+
 pylint()

third_party/symlink.bzl

@@ -0,0 +1,31 @@
+# Copyright (c) 2021 Digital Asset (Switzerland) GmbH and/or its affiliates. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+# Adapted from https://github.com/digital-asset/daml/pull/8428
+
+def _symlink_impl(ctx):
+    executable = ctx.actions.declare_file(ctx.label.name)
+    ctx.actions.symlink(
+        output = executable,
+        target_file = ctx.executable.executable,
+        is_executable = True,
+    )
+
+    runfiles = ctx.runfiles(files = [ctx.executable.executable])
+    runfiles = runfiles.merge(ctx.attr.executable[DefaultInfo].default_runfiles)
+    return [DefaultInfo(
+        executable = executable,
+        files = depset(direct = [executable]),
+        runfiles = runfiles,
+    )]
+
+symlink = rule(
+    _symlink_impl,
+    attrs = {
+        "executable": attr.label(
+            executable = True,
+            cfg = "target",
+        ),
+    },
+    executable = True,
+    doc = "Creates a new target for the given executable.",
+)