Add Bazel build support.

Author: ofats

.gitignore

@@ -1,3 +1,7 @@
 .ycm_extra_conf.py
 build/
 Testing/
+bazel-bin
+bazel-out
+bazel-task_graph
+bazel-testlogs

BUILD.bazel

@@ -0,0 +1,11 @@
+workspace(name = "ofats_task_graph")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "catch2",
+    sha256 = "ff0857d50f75719c1ea309f8690f448d26fe5ed209c6f84020bd6a808a0eac7a",
+    strip_prefix = "Catch2-b9853b4b356b83bb580c746c3a1f11101f9af54f",
+    # v3.0.0-preview3
+    url = "https://github.com/catchorg/catch2/archive/b9853b4b356b83bb580c746c3a1f11101f9af54f.zip",
+)

WORKSPACE

@@ -0,0 +1,20 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "future",
+    hdrs = ["future.h"],
+    copts = ["-std=c++17"],
+    # TODO(ofats): pthread linking should be conditional on platform
+    linkopts = ["-pthread"],
+    linkstatic = True,
+)
+
+cc_test(
+    name = "future_test",
+    srcs = ["ut/future_ut.cpp"],
+    copts = ["-std=c++17"],
+    deps = [
+        ":future",
+        "@catch2//:catch2_main",
+    ],
+)

future/BUILD.bazel

@@ -1,9 +1,9 @@
-#include "future/future.h"
-#include "catch/catch.h"
-
 #include <iostream>
 #include <sstream>
 
+#include "catch2/catch_all.hpp"
+#include "future/future.h"
+
 TEST_CASE("test_then", "[advanced_future]") {
     auto future = my_async([](int a, int b) { return a + b; }, 3, 4)
                       .then([](int c, int d) { return c * d; }, 5);

future/ut/future_ut.cpp

@@ -0,0 +1,8 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "meta",
+    hdrs = ["type_pack.h"],
+    copts = ["-std=c++17"],
+    linkstatic = True,
+)

meta/BUILD.bazel

@@ -0,0 +1,67 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "event",
+    hdrs = ["event.h"],
+    copts = ["-std=c++17"],
+    # TODO(ofats): pthread linking should be conditional on platform
+    linkopts = ["-pthread"],
+    linkstatic = True,
+)
+
+cc_library(
+    name = "task_runner",
+    srcs = ["task_system.cpp"],
+    hdrs = [
+        "task_runner.h",
+        "task_system.h",
+    ],
+    copts = ["-std=c++17"],
+    # TODO(ofats): pthread linking should be conditional on platform
+    linkopts = ["-pthread"],
+    linkstatic = True,
+)
+
+cc_library(
+    name = "task_graph",
+    hdrs = ["task_graph.h"],
+    copts = ["-std=c++17"],
+    linkstatic = True,
+    deps = [
+        ":event",
+    ],
+)
+
+cc_test(
+    name = "task_system_test",
+    srcs = ["ut/task_system_ut.cpp"],
+    copts = ["-std=c++17"],
+    deps = [
+        ":event",
+        ":task_runner",
+        "@catch2//:catch2_main",
+    ],
+)
+
+cc_test(
+    name = "task_runner_test",
+    srcs = ["ut/task_runner_ut.cpp"],
+    copts = ["-std=c++17"],
+    deps = [
+        ":event",
+        ":task_runner",
+        "@catch2//:catch2_main",
+    ],
+)
+
+cc_test(
+    name = "task_graph_test",
+    srcs = ["ut/task_runner_ut.cpp"],
+    copts = ["-std=c++17"],
+    deps = [
+        ":event",
+        ":task_graph",
+        ":task_runner",
+        "@catch2//:catch2_main",
+    ],
+)

task_runner/BUILD.bazel

@@ -1,11 +1,10 @@
-#include "task_runner/task_graph.h"
-#include "task_runner/task_runner.h"
-
 #include <numeric>
 #include <set>
 
-#include "catch/catch.h"
+#include "catch2/catch_all.hpp"
 #include "task_runner/event.h"
+#include "task_runner/task_graph.h"
+#include "task_runner/task_runner.h"
 
 namespace tg = base::task_graph;
 

task_runner/ut/task_graph_ut.cpp

@@ -1,9 +1,8 @@
-#include "task_runner/task_runner.h"
-
 #include <iostream>
 
-#include "catch/catch.h"
+#include "catch2/catch_all.hpp"
 #include "task_runner/event.h"
+#include "task_runner/task_runner.h"
 
 namespace {
 
@@ -60,10 +59,12 @@ TEMPLATE_PRODUCT_TEST_CASE("task_runner_test", "[task_runner]",
     SECTION("Task can be lambda with args") {
         int result = 0;
         base::manual_event event;
-        task_runner.run([&](int a, int b, int c) {
-            result = a + b + c;
-            event.notify();
-        }, 1, 2, 3);
+        task_runner.run(
+            [&](int a, int b, int c) {
+                result = a + b + c;
+                event.notify();
+            },
+            1, 2, 3);
         event.wait();
         REQUIRE(result == 1 + 2 + 3);
     }

task_runner/ut/task_runner_ut.cpp

@@ -1,9 +1,8 @@
-#include "task_runner/task_system.h"
-
 #include <iostream>
 
-#include "catch/catch.h"
+#include "catch2/catch_all.hpp"
 #include "task_runner/event.h"
+#include "task_runner/task_system.h"
 
 namespace {