bazel: rename BUILD.wip to BUILD, some small Istio motivated build ru…

…le changes. (envoyproxy#663)

This patch takes us to the point where we can do a Bazel build of Envoy with:

bazel build //source/exe:envoy-static

and run tests with:

bazel test //test/...

Further user documentation will be supplied in followup patches. The Docker CI support is also
missing, as the WORKSPACE and ci/prebuilt/BUILD rules need some updating.

Other projects that consume Envoy and have a Bazel build should also be able to benefit from the
BUILD files, e.g. Istio.

.gitignore

@@ -6,7 +6,6 @@
 /ci/bazel-*
 /ci/prebuilt/thirdparty
 /ci/prebuilt/thirdparty_build
-BUILD
 cscope.*
 BROWSE
 .deps

bazel/envoy_build_system.bzl

@@ -56,6 +56,8 @@ def envoy_cc_library(name,
 def envoy_cc_binary(name,
                     srcs = [],
                     data = [],
+                    linkstatic = 0,
+                    visibility = None,
                     deps = []):
     native.cc_binary(
         name = name,
@@ -66,7 +68,8 @@ def envoy_cc_binary(name,
             "-pthread",
             "-lrt",
         ],
-        linkstatic = 1,
+        linkstatic = linkstatic,
+        visibility = visibility,
         deps = deps + [
             "//source/precompiled:precompiled_includes",
         ],

source/exe/BUILD.wip → source/exe/BUILD

@@ -4,9 +4,18 @@ load("//bazel:envoy_build_system.bzl", "envoy_cc_library", "envoy_cc_binary")
 
 envoy_cc_binary(
     name = "envoy",
-    srcs = ["main.cc"],
+    deps = ["envoy_main_lib"],
+)
+
+envoy_cc_binary(
+    name = "envoy-static",
+    linkstatic = 1,
+    deps = ["envoy_main_lib"],
+)
+
+envoy_cc_library(
+    name = "envoy_common_lib",
     deps = [
-        ":hot_restart_lib",
         "//source/common/event:libevent_lib",
         "//source/common/local_info:local_info_lib",
         "//source/common/network:utility_lib",
@@ -33,6 +42,15 @@ envoy_cc_binary(
     ],
 )
 
+envoy_cc_library(
+    name = "envoy_main_lib",
+    srcs = ["main.cc"],
+    deps = [
+        ":envoy_common_lib",
+        ":hot_restart_lib",
+    ],
+)
+
 envoy_cc_library(
     name = "hot_restart_lib",
     srcs = ["hot_restart.cc"],