一、遇到的问题
按照github上的说明进行操作
grpc/BUILDING.md at master · grpc/grpc
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Unix
$ git clone -b v1.28.0-pre3 https://github.com/grpc/grpc
$ cd grpc
$ git submodule update --init
克隆最新release版本v1.28.0-pre3，但是克隆速度巨慢。
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二、解决办法
通过码云导入github地址之后克隆速度显著提升。
我已经将https://github.com/grpc/grpc导入我的码云仓库，可以直接克隆。
git clone git@gitee.com:chenwr2020/grpc.git
git checkout -b grpc_v1.28.0-pre3 v1.28.0-pre3
克隆完毕之后再切换release版本tag分支，具体可以根据实际需求来选择分支。
在grpc目录下打开.gitmodules，默认为：
[submodule "third_party/zlib"]
path = third_party/zlib
url = https://github.com/madler/zlib
# When using CMake to build, the zlib submodule ends up with a
# generated file that makes Git consider the submodule dirty. This
# state can be ignored for day-to-day development on gRPC.
ignore = dirty
[submodule "third_party/protobuf"]
path = third_party/protobuf
url = https://github.com/google/protobuf.git
branch = 3.0.x
[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
[submodule "third_party/benchmark"]
path = third_party/benchmark
url = https://github.com/google/benchmark
[submodule "third_party/boringssl-with-bazel"]
path = third_party/boringssl-with-bazel
url = https://github.com/google/boringssl.git
[submodule "third_party/cares/cares"]
path = third_party/cares/cares
url = https://github.com/c-ares/c-ares.git
branch = cares-1_12_0
[submodule "third_party/bloaty"]
path = third_party/bloaty
url = https://github.com/google/bloaty.git
[submodule "third_party/abseil-cpp"]
path = third_party/abseil-cpp
url = https://github.com/abseil/abseil-cpp.git
branch = lts_2020_02_25
[submodule "third_party/envoy-api"]
path = third_party/envoy-api
url = https://github.com/envoyproxy/data-plane-api.git
[submodule "third_party/googleapis"]
path = third_party/googleapis
url = https://github.com/googleapis/googleapis.git
[submodule "third_party/protoc-gen-validate"]
path = third_party/protoc-gen-validate
url = https://github.com/envoyproxy/protoc-gen-validate.git
[submodule "third_party/udpa"]
path = third_party/udpa
url = https://github.com/cncf/udpa.git
[submodule "third_party/libuv"]
path = third_party/libuv
url = https://github.com/libuv/libuv.git
修改为
[submodule "third_party/zlib"]
path = third_party/zlib
url = git@gitee.com:chenwr2020/zlib.git
# When using CMake to build, the zlib submodule ends up with a
# generated file that makes Git consider the submodule dirty. This
# state can be ignored for day-to-day development on gRPC.
ignore = dirty
[submodule "third_party/protobuf"]
path = third_party/protobuf
url = git@gitee.com:chenwr2020/protobuf.git
branch = 3.0.x
[submodule "third_party/gflags"]
path = third_party/gflags
url = git@gitee.com:chenwr2020/gflags.git
[submodule "third_party/googletest"]
path = third_party/googletest
url = git@gitee.com:chenwr2020/googletest.git
[submodule "third_party/benchmark"]
path = third_party/benchmark
url = git@gitee.com:chenwr2020/benchmark.git
[submodule "third_party/boringssl-with-bazel"]
path = third_party/boringssl-with-bazel
url = git@gitee.com:chenwr2020/boringssl.git
[submodule "third_party/cares/cares"]
path = third_party/cares/cares
url = git@gitee.com:chenwr2020/c-ares.git
branch = cares-1_12_0
[submodule "third_party/bloaty"]
path = third_party/bloaty
url = git@gitee.com:chenwr2020/bloaty.git
[submodule "third_party/abseil-cpp"]
path = third_party/abseil-cpp
url = git@gitee.com:chenwr2020/abseil-cpp.git
branch = lts_2020_02_25
[submodule "third_party/envoy-api"]
path = third_party/envoy-api
url = git@gitee.com:chenwr2020/data-plane-api.git
[submodule "third_party/googleapis"]
path = third_party/googleapis
url = git@gitee.com:chenwr2020/googleapis.git
[submodule "third_party/protoc-gen-validate"]
path = third_party/protoc-gen-validate
url = git@gitee.com:chenwr2020/protoc-gen-validate.git
[submodule "third_party/udpa"]
path = third_party/udpa
url = git@gitee.com:chenwr2020/udpa.git
[submodule "third_party/libuv"]
path = third_party/libuv
url = git@gitee.com:chenwr2020/libuv.git
git submodule update --init 会克隆一些子模块仓库。自动安装这些第三方模块仓库还是很慢，我已经将第三方模块的仓库都导入我的码云仓库。
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速度提升不止一个档次。
三、码云导入github
登录码云注册账号。
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导入成功后
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之后克隆显示需要添加公钥。
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在你要添加的机器中获取自己原先github生成的密钥。
具体如何生成可以参考博客：
ubuntu14.04 Git Github环境搭建设置_chenwr2018的博客-CSDN博客
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将上述文件获取的内容复制粘贴后生成公钥。
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到此就可以愉快的克隆了。
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