[wheel] Add rules to create a platform-independent wheel (#16)

Upgrade rules_python to 0.24.0.

Remove spurous liblcm dependency from lcm-gen.

README.md

@@ -4,10 +4,32 @@ This repository contains a python application which translates data
 streamed from the Optitrack Motive software (aka NatNet) into LCM
 messages.
 
-To build:
+## To build and run locally:
 
-```bazel build //...```
+```
+bazel run //src:optitrack_client
+```
 
-To run:
+## To build a wheel:
 
-```bazel run //src:optitrack_client```
+```
+bazel build //wheel
+```
+
+Then (within a virtual environment), install the wheel file:
+
+```
+pip install bazel-bin/wheel/optitrack_driver-*-py3-none-any.whl
+```
+
+Then (within the virtual environment), run the program as either:
+
+```
+python -m optitrack.client
+```
+
+or
+
+```
+bin/optitrack_client
+```

WORKSPACE

@@ -71,8 +71,9 @@ python_repository(name = "python")
 
 http_archive(
     name = "rules_python",
-    url = "https://github.com/bazelbuild/rules_python/releases/download/0.0.1/rules_python-0.0.1.tar.gz",
-    sha256 = "aa96a691d3a8177f3215b14b0edc9641787abaaa30363a080165d06ab65e1161",
+    url = "https://github.com/bazelbuild/rules_python/releases/download/0.24.0/rules_python-0.24.0.tar.gz",
+    strip_prefix = "rules_python-0.24.0",
+    sha256 = "0a8003b044294d7840ac7d9d73eef05d6ceb682d7516781a4ec62eeb34702578",
 )
 
 load("@rules_python//python:repositories.bzl", "py_repositories")

lcmtypes/BUILD.bazel

@@ -20,13 +20,41 @@ LCM_SRCS = [
     "optitrack_skeleton_t.lcm",
 ]
 
+# Also provide the srcs in a package-specific subdir.
+[
+    genrule(
+        name = "_cp_" + x,
+        srcs = [x],
+        outs = ["optitrack/" + x],
+        cmd = "cp $< $@",
+        visibility = ["//visibility:private"],
+    )
+    for x in LCM_SRCS
+]
+
+filegroup(
+    name = "lcm_srcs_with_subdir",
+    srcs = [
+        ":optitrack/" + x
+        for x in LCM_SRCS
+    ],
+)
+
 lcm_cc_library(
     name = "optitrack_lcmtypes",
     lcm_package = "optitrack",
     lcm_srcs = LCM_SRCS,
     linkstatic = 1,
 )
 
+filegroup(
+    name = "cxx_srcs",
+    srcs = [
+        ":optitrack/" + x.replace(".lcm", ".hpp")
+        for x in LCM_SRCS
+    ],
+)
+
 lcm_py_library(
     name = "py_optitrack_lcmtypes",
     lcm_package = "optitrack",
@@ -38,3 +66,11 @@ lcm_java_library(
     lcm_package = "optitrack",
     lcm_srcs = LCM_SRCS,
 )
+
+filegroup(
+    name = "java_srcs",
+    srcs = [
+        ":optitrack/" + x.replace(".lcm", ".java")
+        for x in LCM_SRCS
+    ],
+)

tools/lcm.BUILD

@@ -132,6 +132,7 @@ cc_binary(
 cc_binary(
     name = "lcm-gen",
     srcs = [
+        "lcm/lcm_version.h",
         "lcmgen/emit_c.c",
         "lcmgen/emit_cpp.c",
         "lcmgen/emit_csharp.c",
@@ -150,7 +151,6 @@ cc_binary(
     copts = LCM_COPTS,
     includes = ["."],
     deps = [
-        ":lcm",
         "@glib",
     ],
 )

version.bzl

@@ -0,0 +1 @@
+VERSION = "0.0.20230714"

wheel/BUILD.bazel

@@ -0,0 +1,48 @@
+# -*- python -*-
+# This file contains rules for the Bazel build system; see https://bazel.build.
+
+load("//:version.bzl", "VERSION")
+load("@rules_python//python:packaging.bzl", "py_wheel")
+
+licenses(["notice"])
+
+package(default_visibility = ["//visibility:private"])
+
+genrule(
+    name = "_cp_client",
+    srcs = ["//src:optitrack_client.py"],
+    outs = ["optitrack/client.py"],
+    cmd = "cp $< $@",
+)
+
+py_library(
+    name = "client",
+    srcs = [":optitrack/client.py"],
+)
+
+py_wheel(
+    name = "wheel",
+    visibility = ["//visibility:public"],
+    distribution = "optitrack_driver",
+    version = VERSION,
+    summary = "Translates data streamed from the Optitrack Motive software into LCM messages.",
+    requires = [
+        "lcm",
+    ],
+    entry_points = {
+        "console_scripts": [
+            "optitrack_client = optitrack.client:main",
+        ],
+    },
+    deps = [
+        ":client",
+        "//lcmtypes:cxx_srcs",
+        "//lcmtypes:java_srcs",
+        "//lcmtypes:lcm_srcs_with_subdir",
+        "//lcmtypes:py_optitrack_lcmtypes",
+    ],
+    strip_path_prefixes = [
+        "lcmtypes/",
+        "wheel/",
+    ],
+)