Remove gflags.

With the move to abseil's flags, this removed the now-unnecessary submodule and installation commands.

.gitmodules

@@ -8,9 +8,6 @@
 [submodule "third_party/protobuf"]
 	path = third_party/protobuf
 	url = https://github.com/google/protobuf.git
-[submodule "third_party/gflags"]
-	path = third_party/gflags
-	url = https://github.com/gflags/gflags.git
 [submodule "third_party/googletest"]
 	path = third_party/googletest
 	url = https://github.com/google/googletest.git

.travis.yml

@@ -47,7 +47,6 @@ before_install:
   - pod --version
   # Recent pods aren't found if we don't explicitly update Cocoapods' repo.
   - pod repo update
-  - brew install gflags
 install:
   - pushd $TEST_PATH
   - pod install

BUILDING.md

@@ -19,8 +19,6 @@ If you plan to build using CMake
 
 If you are a contributor and plan to build and run tests, install the following as well:
 ```sh
- $ # libgflags-dev is only required if building with make (deprecated)
- $ [sudo] apt-get install libgflags-dev
  $ # clang and LLVM C++ lib is only required for sanitizer builds
  $ [sudo] apt-get install clang-5.0 libc++-dev
 ```
@@ -45,12 +43,6 @@ packages from [Homebrew](https://brew.sh):
 
 If you plan to build using CMake, follow the instructions from https://cmake.org/download/
 
-If you are a contributor and plan to build and run tests, install the following as well:
-```sh
- $ # gflags is only required if building with make (deprecated) 
- $ brew install gflags
-```
-
 *Tip*: when building,
 you *may* want to explicitly set the `LIBTOOL` and `LIBTOOLIZE`
 environment variables when running `make` to ensure the version

bazel/grpc_deps.bzl

@@ -196,17 +196,6 @@ def grpc_deps():
             ],
         )
 
-    if "com_github_gflags_gflags" not in native.existing_rules():
-        http_archive(
-            name = "com_github_gflags_gflags",
-            sha256 = "63ae70ea3e05780f7547d03503a53de3a7d2d83ad1caaa443a31cb20aea28654",
-            strip_prefix = "gflags-28f50e0fed19872e0fd50dd23ce2ee8cd759338e",
-            urls = [
-                "https://storage.googleapis.com/grpc-bazel-mirror/github.com/gflags/gflags/archive/28f50e0fed19872e0fd50dd23ce2ee8cd759338e.tar.gz",
-                "https://github.com/gflags/gflags/archive/28f50e0fed19872e0fd50dd23ce2ee8cd759338e.tar.gz",
-            ],
-        )
-
     if "com_github_google_benchmark" not in native.existing_rules():
         http_archive(
             name = "com_github_google_benchmark",

build_handwritten.yaml

@@ -58,10 +58,6 @@ vspackages:
   props: true
   redist: true
   version: 1.0.204.1
-- name: gflags
-  props: false
-  redist: false
-  version: 2.1.2.1
 - name: gtest
   props: false
   redist: false

cmake/gflags.cmake

@@ -1,34 +0,0 @@
-# Copyright 2017 gRPC 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.
-
-if(gRPC_GFLAGS_PROVIDER STREQUAL "module")
-  if(NOT GFLAGS_ROOT_DIR)
-    set(GFLAGS_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/gflags)
-  endif()
-  if(EXISTS "${GFLAGS_ROOT_DIR}/CMakeLists.txt")
-    add_subdirectory(${GFLAGS_ROOT_DIR} third_party/gflags)
-    set(_gRPC_GFLAGS_LIBRARIES gflags::gflags)
-  else()
-    message(WARNING "gRPC_GFLAGS_PROVIDER is \"module\" but GFLAGS_ROOT_DIR is wrong")
-  endif()
-elseif(gRPC_GFLAGS_PROVIDER STREQUAL "package")
-  # Use "CONFIG" as there is no built-in cmake module for gflags.
-  find_package(gflags REQUIRED CONFIG)
-  if(TARGET gflags::gflags)
-    set(_gRPC_GFLAGS_LIBRARIES gflags::gflags)
-  endif()
-  set(_gRPC_FIND_GFLAGS "if(NOT gflags_FOUND)\n  find_package(gflags CONFIG)\nendif()")
-elseif(gRPC_GFLAGS_PROVIDER STREQUAL "none")
-  # gflags is a test-only dependency and can be avoided if we're not building tests.
-endif()

doc/command_line_tool.md

@@ -41,17 +41,6 @@ repository, you need to run the following command to update submodules:
 git submodule update --init
 ```
 
-You also need to have the gflags library installed on your system. gflags can be
-installed with the following command:
-Linux:
-```
-sudo apt-get install libgflags-dev
-```
-Mac systems with Homebrew:
-```
-brew install gflags
-```
-
 Once the prerequisites are satisfied, you can build with cmake:
 
 ```

templates/CMakeLists.txt.template

@@ -71,8 +71,6 @@
         deps.append(get_absl_dep(d))
       else:
         deps.append(d)
-    if (target_dict.build == 'test' or target_dict.build == 'private') and target_dict.language == 'c++':
-      deps.append("${_gRPC_GFLAGS_LIBRARIES}")
     return deps
 
   def get_platforms_condition_begin(platforms):
@@ -199,13 +197,9 @@
   set_property(CACHE gRPC_PROTOBUF_PACKAGE_TYPE PROPERTY STRINGS "CONFIG" "MODULE")
 
   if(gRPC_BUILD_TESTS)
-    set(gRPC_GFLAGS_PROVIDER "module" CACHE STRING "Provider of gflags library")
-    set_property(CACHE gRPC_GFLAGS_PROVIDER PROPERTY STRINGS "module" "package")
-
     set(gRPC_BENCHMARK_PROVIDER "module" CACHE STRING "Provider of benchmark library")
     set_property(CACHE gRPC_BENCHMARK_PROVIDER PROPERTY STRINGS "module" "package")
   else()
-    set(gRPC_GFLAGS_PROVIDER "none")
     set(gRPC_BENCHMARK_PROVIDER "none")
   endif()
 
@@ -315,7 +309,6 @@
   include(cmake/address_sorting.cmake)
   include(cmake/benchmark.cmake)
   include(cmake/cares.cmake)
-  include(cmake/gflags.cmake)
   include(cmake/protobuf.cmake)
   include(cmake/re2.cmake)
   include(cmake/ssl.cmake)

templates/tools/dockerfile/test/cxx_alpine_x64/Dockerfile.template

@@ -47,11 +47,6 @@
   # Google Cloud platform API libraries
   RUN pip install --upgrade google-api-python-client
   
-  # Install gflags
-  RUN git clone https://github.com/gflags/gflags.git && cd gflags && git checkout v2.2.0
-  RUN cd gflags && cmake . && make && make install
-  RUN ln -s /usr/local/include/gflags /usr/include/gflags
-  
   <%include file="../../run_tests_addons.include"/>
   
   # Define the default command.

test/distrib/cpp/run_distrib_test_cmake_as_externalproject.sh

@@ -26,7 +26,6 @@ apt-get update && apt-get install -y libssl-dev
 rm -r third_party/benchmark/* || true
 rm -r third_party/bloaty/* || true
 rm -r third_party/boringssl-with-bazel/* || true
-rm -r third_party/gflags/* || true
 rm -r third_party/googletest/* || true
 
 # Build helloworld example using cmake superbuild

third_party/gflags

@@ -1 +0,0 @@
-Subproject commit 28f50e0fed19872e0fd50dd23ce2ee8cd759338e

tools/buildgen/extract_metadata_from_bazel_xml.py

@@ -239,7 +239,7 @@ def _external_dep_name_from_bazel_dependency(bazel_dep):
     elif bazel_dep == '//external:benchmark':
         return 'benchmark'
     else:
-        # all the other external deps such as gflags, protobuf, cares, zlib
+        # all the other external deps such as protobuf, cares, zlib
         # don't need to be listed explicitly, they are handled automatically
         # by the build system (make, cmake)
         return None

tools/dockerfile/grpc_dist_proto/Dockerfile

@@ -19,7 +19,7 @@ FROM grpc/base
 ADD version.txt version.txt
 
 # Install tools needed for building protoc.
-RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev
+RUN apt-get update && apt-get -y install libgtest-dev
 
 # Get the protobuf source from GitHub.
 RUN mkdir -p /var/local/git

tools/dockerfile/grpc_scan_build/Dockerfile

@@ -17,7 +17,6 @@ FROM grpc/clang:latest
 RUN apt-get update && apt-get install -y \
   autoconf \
   libtool \
-  libgflags-dev \
   libgtest-dev \
   && apt-get clean
 

tools/dockerfile/test/cxx_alpine_x64/Dockerfile

@@ -45,11 +45,6 @@ RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.5.0.post1 six==1.15.0 t
 # Google Cloud platform API libraries
 RUN pip install --upgrade google-api-python-client
 
-# Install gflags
-RUN git clone https://github.com/gflags/gflags.git && cd gflags && git checkout v2.2.0
-RUN cd gflags && cmake . && make && make install
-RUN ln -s /usr/local/include/gflags /usr/include/gflags
-
 
 RUN mkdir /var/local/jenkins
 

tools/gce/linux_kokoro_performance_worker_init.sh

@@ -74,7 +74,7 @@ sudo apt-get install -y python-psutil python3-psutil
 sudo apt-get install -y google-cloud-sdk
 
 # C++ dependencies
-sudo apt-get install -y libgflags-dev libgtest-dev libc++-dev clang
+sudo apt-get install -y libgtest-dev libc++-dev clang
 
 # Python dependencies
 sudo pip install --upgrade pip==19.3.1

tools/run_tests/sanity/check_bazel_workspace.py

@@ -49,7 +49,6 @@ _GRPC_DEP_NAMES = [
     'com_google_protobuf',
     'com_google_googletest',
     'rules_cc',
-    'com_github_gflags_gflags',
     'com_github_google_benchmark',
     'com_github_cares_cares',
     'com_google_absl',

tools/run_tests/sanity/check_submodules.sh

@@ -32,7 +32,6 @@ cat << EOF | awk '{ print $1 }' | sort > "$want_submodules"
  29c6e0e27268f5a43e039cd2ed4e849d6b736fc1 third_party/boringssl-with-bazel (remotes/origin/master-with-bazel)
  e982924acee7f7313b4baa4ee5ec000c5e373c30 third_party/cares/cares (cares-1_15_0)
  9997e1137cdb59e622af13e57ca915a2f3c9f84f third_party/envoy-api (heads/master)
- 28f50e0fed19872e0fd50dd23ce2ee8cd759338e third_party/gflags (v2.2.0-5-g30dbc81)
  80ed4d0bbf65d57cc267dfc63bd2584557f11f9b third_party/googleapis (common-protos-1_3_1-915-g80ed4d0bb)
  c9ccac7cb7345901884aabf5d1a786cfa6e2f397 third_party/googletest (6e2f397)
  15ae750151ac9341e5945eb38f8982d59fb99201 third_party/libuv (v1.34.0)