Add repo and dependencies for math

example/bazel.repos

@@ -1,4 +1,8 @@
 repositories:
+  math:
+    type: git
+    url: https://github.com/gazebosim/gz-math
+    version: gz-math7
   utils:
     type: git
     url: https://github.com/gazebosim/gz-utils

workspace/default.bzl

@@ -5,6 +5,7 @@ load("@gz//bazel/workspace:os.bzl", "os_repository")
 load("@gz//bazel/workspace/bazel_skylib:repository.bzl", "bazel_skylib_repository")  # noqa
 load("@gz//bazel/workspace/buildifier:repository.bzl", "buildifier_repository")  # noqa
 load("@gz//bazel/workspace/cli11:repository.bzl", "cli11_repository")  # noqa
+load("@gz//bazel/workspace/eigen3:repository.bzl", "eigen3_repository")  # noqa
 load("@gz//bazel/workspace/gtest:repository.bzl", "gtest_repository")  # noqa
 load("@gz//bazel/workspace/pycodestyle:repository.bzl", "pycodestyle_repository")  # noqa
 load("@gz//bazel/workspace/rules_python:repository.bzl", "rules_python_repository")  # noqa
@@ -26,6 +27,8 @@ def add_default_repositories(excludes = [], mirrors = DEFAULT_MIRRORS):
         cli11_repository(name = "cli11", mirrors = mirrors)
     if "gtest" not in excludes:
         gtest_repository(name = "gtest", mirrors = mirrors)
+    if "eigen3" not in excludes:
+        eigen3_repository(name = "eigen3")
     if "pycodestyle" not in excludes:
         pycodestyle_repository(name = "pycodestyle", mirrors = mirrors)
     if "rules_python" not in excludes:

workspace/eigen3/BUILD.bazel

@@ -0,0 +1,3 @@
+load("@gz//bazel/lint:lint.bzl", "add_lint_tests")
+
+add_lint_tests()

workspace/eigen3/package.BUILD.bazel

@@ -0,0 +1,56 @@
+# Copyright 2018 The Cartographer Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Description:
+#   Eigen is a C++ template library for linear algebra: vectors,
+#   matrices, and related algorithms.
+
+licenses([
+    # Note: Eigen is an MPL2 library that includes GPL v3 and LGPL v2.1+ code.
+    #       We've taken special care to not reference any restricted code.
+    "reciprocal",  # MPL2
+    "notice",  # Portions BSD
+])
+
+exports_files(["COPYING.MPL2"])
+
+EIGEN_FILES = [
+    "include/eigen3/Eigen/**",
+    "include/eigen3/unsupported/Eigen/CXX11/**",
+    "include/eigen3/unsupported/Eigen/FFT",
+    "include/eigen3/unsupported/Eigen/KroneckerProduct",
+    "include/eigen3/unsupported/Eigen/src/FFT/**",
+    "include/eigen3/unsupported/Eigen/src/KroneckerProduct/**",
+    "include/eigen3/unsupported/Eigen/MatrixFunctions",
+    "include/eigen3/unsupported/Eigen/SpecialFunctions",
+    "include/eigen3/unsupported/Eigen/src/MatrixFunctions/**",
+    "include/eigen3/unsupported/Eigen/src/SpecialFunctions/**",
+]
+
+# List of files picked up by glob but actually part of another target.
+EIGEN_EXCLUDE_FILES = [
+    "include/eigen3/Eigen/src/Core/arch/AVX/PacketMathGoogleTest.cc",
+]
+
+EIGEN_MPL2_HEADER_FILES = glob(
+    EIGEN_FILES,
+    exclude = EIGEN_EXCLUDE_FILES,
+)
+
+cc_library(
+    name = "eigen3",
+    hdrs = EIGEN_MPL2_HEADER_FILES,
+    includes = ["include/eigen3"],
+    visibility = ["//visibility:public"],
+)

workspace/eigen3/repository.bzl

@@ -0,0 +1,23 @@
+load("@gz//bazel/workspace:os.bzl", "determine_os")
+
+def _impl(repository_ctx):
+    os_result = determine_os(repository_ctx)
+
+    if os_result.error != None:
+        fail(os_result.error)
+
+    if os_result.is_ubuntu:
+        repository_ctx.symlink("/usr/include/eigen3/Eigen", "include/eigen3/Eigen")  # noqa
+        repository_ctx.symlink("/usr/include/eigen3/unsupported", "include/eigen3/unsupported")  # noqa
+
+    # Add the BUILD file.
+    repository_ctx.symlink(
+        Label("@gz//bazel/workspace/eigen3:package.BUILD.bazel"),
+        "BUILD.bazel",
+    )
+
+eigen3_repository = repository_rule(
+    local = True,
+    configure = True,
+    implementation = _impl,
+)