Add Bazel support

.gitignore

@@ -3,3 +3,4 @@
 /generated
 cscope.*
 BROWSE
+bazel-*

BUILD

@@ -0,0 +1,155 @@
+load("@protobuf//:protobuf.bzl", "cc_proto_library")
+
+exports_files(["source/precompiled/precompiled.h"])
+
+package(default_visibility = ["//visibility:public"])
+
+genrule(
+    name = "envoy-ratelimit-proto",
+    srcs = [
+        "source/common/ratelimit/ratelimit.proto",
+    ],
+    outs = [
+        "source/common/generated/ratelimit.proto",
+    ],
+    cmd = "cp $(SRCS) $@",
+)
+
+cc_proto_library(
+    name = "envoy-ratelimit-pb",
+    srcs = [
+        "source/common/generated/ratelimit.proto",
+    ],
+    include = "source",
+    default_runtime = "@protobuf//:protobuf",
+    protoc = "@protobuf//:protoc",
+)
+
+genrule(
+    name = "envoy-test-proto",
+    srcs = [
+        "test/proto/helloworld.proto",
+    ],
+    outs = [
+        "test/generated/helloworld.proto",
+    ],
+    cmd = "cp $(SRCS) $@",
+)
+
+cc_proto_library(
+    name = "envoy-test-pb",
+    srcs = [
+        "test/generated/helloworld.proto",
+    ],
+    include = "test",
+    default_runtime = "@protobuf//:protobuf",
+    protoc = "@protobuf//:protoc",
+)
+
+genrule(
+    name = "envoy-version",
+    srcs = glob([
+        ".git/**",
+    ]),
+    outs = [
+        "source/common/version_generated.cc",
+    ],
+    cmd = "touch $@ && $(location tools/gen_git_sha.sh) $$(dirname $(location tools/gen_git_sha.sh)) $@",
+    local = 1,
+    tools = [
+        "tools/gen_git_sha.sh",
+    ],
+)
+
+cc_library(
+    name = "envoy-common",
+    srcs = glob(
+        [
+            "source/**/*.cc",
+            "source/**/*.h",
+            "include/**/*.h",
+        ],
+        exclude = ["source/exe/main.cc"],
+    ) + [
+        "source/common/version_generated.cc",
+    ],
+    copts = [
+        "-includesource/precompiled/precompiled.h",
+    ],
+    includes = [
+        "include",
+        "source",
+    ],
+    linkopts = [
+        "-lpthread",
+        "-lanl",
+        "-lrt",
+    ],
+    linkstatic = 1,
+    deps = [
+        ":envoy-ratelimit-pb",
+        "@libevent//:event",
+        "@libevent//:event_pthreads",
+        "@http_parser//:http_parser",
+        "@boringssl//:ssl",
+        "@lightstep//:lightstep_core",
+        "@nghttp2//:nghttp2",
+        "@protobuf//:protobuf",
+        "@rapidjson//:rapidjson",
+        "@spdlog//:spdlog",
+        "@tclap//:tclap",
+    ],
+    alwayslink = 1,
+)
+
+cc_binary(
+    name = "envoy",
+    srcs = [
+        "source/exe/main.cc",
+    ],
+    copts = [
+        "-includesource/precompiled/precompiled.h",
+    ],
+    linkstatic = 1,
+    deps = [
+        ":envoy-common",
+    ],
+)
+
+cc_library(
+    name = "envoy-test-lib",
+    srcs = glob([
+        "test/**/*.cc",
+        "test/**/*.h",
+    ]),
+    copts = [
+        "-includetest/precompiled/precompiled_test.h",
+    ],
+    deps = [
+        ":envoy-common",
+        ":envoy-test-pb",
+        "@googletest//:googletest",
+    ],
+    alwayslink = 1,
+)
+
+filegroup(
+    name = "envoy-testdata",
+    srcs = glob([
+        "generated/**/*",
+        "test/**/*",
+    ]),
+)
+
+cc_test(
+    name = "envoy-test",
+    data = [
+        ":envoy-testdata",
+    ],
+    linkstatic = 1,
+    deps = [
+        ":envoy-test-lib",
+        ":envoy-test-pb",
+        "@googletest//:googletest",
+    ],
+)

WORKSPACE

@@ -0,0 +1,3 @@
+load("//:repositories.bzl", "envoy_dependencies")
+
+envoy_dependencies()

docs/install/building.rst

@@ -27,3 +27,24 @@ available to turn on debug builds, address sanitizer, etc.).
 * :repo:`CMakeLists.txt`
 * :repo:`common.cmake`
 * :repo:`thirdparty.cmake`
+
+(Experimental) Building with Bazel_
+
+Follow the instruction_ to install Bazel, then run following command to build Envoy:
+
+.. code-block:: console
+
+  bazel build //:envoy
+
+The built binary will be at `bazel-bin/envoy`
+
+To run tests, run following command:
+
+.. code-block:: console
+
+  bazel test //:envoy-test
+
+Note not all tests pass with Bazel yet.
+
+.. _Bazel: https://bazel.build/
+.. _instruction: https://bazel.build/versions/master/docs/install.html