From ac8d75503a94bb8ab0656592dc9bd22e3ff817bc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20No=C3=A9?= <dpn@google.com>
Date: Mon, 24 Apr 2017 16:43:26 -0400
Subject: [PATCH 1/2] External Deps: Add 'Backward' backtrace library.

This adds github:bombela/backward-cpp as an external dependency.  It is
covered under the MIT license.

This PR is a pre-requisite for a second PR which uses this feature
within Envoy.  This PR needs to be merged first for the CI image to
include the external dependency.
---
 bazel/target_recipes.bzl                     | 1 +
 ci/build_container/build_recipes/backward.sh | 7 +++++++
 ci/prebuilt/BUILD                            | 6 ++++++
 docs/install/requirements.rst                | 1 +
 4 files changed, 15 insertions(+)
 create mode 100644 ci/build_container/build_recipes/backward.sh

diff --git a/bazel/target_recipes.bzl b/bazel/target_recipes.bzl
index 111348f623ac8..bc53766c63d0a 100644
--- a/bazel/target_recipes.bzl
+++ b/bazel/target_recipes.bzl
@@ -3,6 +3,7 @@
 # ci/build_container/build_recipes.
 TARGET_RECIPES = {
     "ares": "cares",
+    "backward": "backward",
     # TODO(htuch): Remove when cmake goes.
     "cotire": "cotire",
     "event": "libevent",
diff --git a/ci/build_container/build_recipes/backward.sh b/ci/build_container/build_recipes/backward.sh
new file mode 100644
index 0000000000000..814b28ef8140e
--- /dev/null
+++ b/ci/build_container/build_recipes/backward.sh
@@ -0,0 +1,7 @@
+set -e
+
+git clone https://github.com/bombela/backward-cpp.git
+cd backward-cpp
+# v1.3 release
+git reset --hard cd1c4bd9e48afe812a0e996d335298c455afcd92
+cp backward.hpp $THIRDPARTY_BUILD/include
diff --git a/ci/prebuilt/BUILD b/ci/prebuilt/BUILD
index fa02d6a4a5bee..4d69469d1542f 100644
--- a/ci/prebuilt/BUILD
+++ b/ci/prebuilt/BUILD
@@ -7,6 +7,12 @@ cc_library(
     includes = ["thirdparty_build/include"],
 )
 
+cc_library(
+    name = "backward",
+    hdrs = glob(["thirdparty_build/include/*.hpp"]),
+    includes = ["thirdparty_build/include"],
+)
+
 cc_library(
     name = "crypto",
     srcs = ["thirdparty_build/lib/libcrypto.a"],
diff --git a/docs/install/requirements.rst b/docs/install/requirements.rst
index 7063f25f5152e..20b690116915b 100644
--- a/docs/install/requirements.rst
+++ b/docs/install/requirements.rst
@@ -21,6 +21,7 @@ Envoy has the following requirements:
 * `lightstep-tracer-cpp <https://github.com/lightstep/lightstep-tracer-cpp/>`_ (last tested with 0.36)
 * `rapidjson <https://github.com/miloyip/rapidjson/>`_ (last tested with 1.1.0)
 * `c-ares <https://github.com/c-ares/c-ares>`_ (last tested with 1.12.0)
+* `backward <https://github.com/bombela/backward-cpp>`_ (last tested with 1.3)
 
 In order to compile and run the tests the following is required:
 

From 43503c1ce30219003d7e501df82f76d8b8f4f65d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20No=C3=A9?= <dpn@google.com>
Date: Mon, 24 Apr 2017 17:14:36 -0400
Subject: [PATCH 2/2] Eliminate glob.

---
 ci/prebuilt/BUILD | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ci/prebuilt/BUILD b/ci/prebuilt/BUILD
index 4d69469d1542f..53dc4ff4b374c 100644
--- a/ci/prebuilt/BUILD
+++ b/ci/prebuilt/BUILD
@@ -9,7 +9,7 @@ cc_library(
 
 cc_library(
     name = "backward",
-    hdrs = glob(["thirdparty_build/include/*.hpp"]),
+    hdrs = ["thirdparty_build/include/backward.hpp"],
     includes = ["thirdparty_build/include"],
 )