英文:
proto: file is already registered with different packages
问题
我有两个在不同的Go包下编译的proto文件，但当我在服务器上注册它们并运行时，出现以下错误：
panic: proto: file "common.proto" is already registered
previously from: "github.com/soft/test-platform.go/common"
currently from: "github.com/soft/proto-asterix/asterix"
这是test-platform代码库中的common.proto文件（位于/api文件夹中）：
syntax = "proto3";
package soft.testplatform.common; // 这里我定义了一个唯一的包名！
option java_multiple_files = true;
option go_package = "github.com/soft/test-platform.go/common"; // 这里我定义了一个唯一的Go包名！
message MyMessage{
string commandId = 1;
}
如您所见，go_package和package的包定义与github.com/soft/proto-asterix/asterix的包不冲突。只有.proto文件名相似（common.proto）。
我使用以下命令使用protoc和protoc-gen-go插件生成Go文件：
protoc \
--proto_path=../test-platform/api/ \
--go_out=./common --go_opt=paths=source_relative \
../test-platform/api/common.proto
根据此文档https://developers.google.com/protocol-buffers/docs/reference/go/faq#fix-namespace-conflict，应该将包和文件名附加到检查注册冲突，但在这里似乎不是这样。
是否有人遇到过这种情况？我是否遗漏了解决此包名冲突的明显方法？
以下是我尝试过的方法：
- 在common.proto文件中添加/删除
package指令 - 更改protoc命令以使用绝对（而不是相对）的
proto_path
Protoc版本：libprotoc 3.15.7
Protoc go插件版本：protoc-gen-go v1.26.0
英文:
I have 2 proto compiled under different go packages but when I register them in a a server and run it, I get :
panic: proto: file "common.proto" is already registered
previously from: "github.com/soft/test-platform.go/common"
currently from: "github.com/soft/proto-asterix/asterix"
Here is common.proto in test-platform repository (in /api folder) :
syntax = "proto3";
package soft.testplatform.common; // here I do defint a UNIQUE package name !
option java_multiple_files = true;
option go_package = "github.com/soft/test-platform.go/common"; // Here I do define a unique go package name !
message MyMessage{
string commandId = 1;
}
As you can see, the package definition for go_package and package do not collide with package from github.com/soft/proto-asterix/asterix. Only the .proto filenames are similar (common.proto).
I generate go files with protoc an protoc-gen-go plugin using the following command :
protoc \
--proto_path=../test-platform/api/ \
--go_out=./common --go_opt=paths=source_relative \
../test-platform/api/common.proto
As per documentation here https://developers.google.com/protocol-buffers/docs/reference/go/faq#fix-namespace-conflict the package and filename should be appended to check for a registration conflict but it does not seem to be the case here.
Has anyone encountered such behavior ? Do I miss something obvious to resolve this package name collision ?
Here is what I tried :
- Adding/removing
packageinstruction tocommon.protofile - Change protoc command to use an absolute (and not relative)
proto_path
Protoc version : libprotoc 3.15.7
Protoc go plugin version : protoc-gen-go v1.26.0
答案1
得分: 4
接受的答案不再正确。这个提交撤销了这个“错误修复”，因为它与其他gRPC实现不同。
我唯一的解决办法是重命名文件/文件夹。
英文:
The accepted answer is not correct anymore. This commit reverted the "bugfix" as it was different from other gRPC implementations.
My only way to fix this was to rename the file/folder.
答案2
得分: 3
感谢@blackgreen的建议，确实，这是一个由https://go-review.googlesource.com/c/protobuf/+/301953/修复的错误。
虽然protoc-gen-go的下一个版本已经发布，但是这里有一个快速修复方法适用于你的项目：
使用修复后的protoc-gen-go：
go install google.golang.org/protobuf/cmd/protoc-gen-go@febffdd
修改你的go.mod文件中的导入以匹配
google.golang.org/protobuf v1.26.1-0.20210525005349-febffdd88e85
你应该可以继续进行了！
英文:
Thanks to @blackgreen suggestion, indeed, this was a bug fixed by https://go-review.googlesource.com/c/protobuf/+/301953/
While the next release of protoc-gen-go is out, here is a quick fix for your projects :
Use the fixed protoc-gen-go :
go install google.golang.org/protobuf/cmd/protoc-gen-go@febffdd
Change your imports in your go.mod to match
google.golang.org/protobuf v1.26.1-0.20210525005349-febffdd88e85
You should be good to go !
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