protoc-gen-grpc-java not available on apple m1

What version of gRPC-Java are you using?

1.34.0

What is your environment?

osx 11.0.1

What did you expect to see?

build success

What did you see instead?

[INFO] --- protobuf-maven-plugin:0.6.1:compile (default-cli) @ grpc ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.720 s
[INFO] Finished at: 2020-12-03T16:37:02+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.xolstice.maven.plugins:protobuf-maven-plugin:0.6.1:compile (default-cli) on project grpc: Unable to resolve artifact: Missing:
[ERROR] ----------
[ERROR] 1) com.google.protobuf:protoc:exe:osx-aarch_64:3.12.0
[ERROR] 
[ERROR]   Try downloading the file manually from the project website.
[ERROR] 
[ERROR]   Then, install it using the command: 
[ERROR]       mvn install:install-file -DgroupId=com.google.protobuf -DartifactId=protoc -Dversion=3.12.0 -Dclassifier=osx-aarch_64 -Dpackaging=exe -Dfile=/path/to/file
[ERROR] 
[ERROR]   Alternatively, if you host your own repository you can deploy the file there: 
[ERROR]       mvn deploy:deploy-file -DgroupId=com.google.protobuf -DartifactId=protoc -Dversion=3.12.0 -Dclassifier=osx-aarch_64 -Dpackaging=exe -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
[ERROR] 
[ERROR]   Path to dependency: 
[ERROR]   	1) com.reinmind:grpc:jar:1.0-SNAPSHOT
[ERROR]   	2) com.google.protobuf:protoc:exe:osx-aarch_64:3.12.0
[ERROR] 
[ERROR] ----------
[ERROR] 1 required artifact is missing.
[ERROR] 
[ERROR] for artifact: 
[ERROR]   com.reinmind:grpc:jar:1.0-SNAPSHOT
[ERROR] 
[ERROR] from the specified remote repositories:
[ERROR]   aliyunmaven (https://maven.aliyun.com/repository/public, releases=true, snapshots=false)
[ERROR] 
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Steps to reproduce the bug

mvn protobuf:compile

[ejona86]

To manually specify the classifier, for Gradle:

protobuf {
  protoc {
    artifact = 'com.google.protobuf:protoc:3.14.0:osx-x86_64'
  }
}

I’m less familiar with the Maven plugin, but I think it may be something like:

<protocArtifact>com.google.protobuf:protoc:3.14.0:exe:osx-x86_64</protocArtifact>

You can do the same for protoc-gen-grpc-java.

[guyeu]

for me, add this to ~/.m2/settings.xml, it worked:

<settings>
  ...
  <activeProfiles>
    <activeProfile>
      apple-silicon
    </activeProfile>
    ...
  </activeProfiles>
  <profiles>
    <profile>
      <id>apple-silicon</id>
      <properties>
        <os.detected.classifier>osx-x86_64</os.detected.classifier>
      </properties>
    </profile>
    ...
  </profiles>
  ...
</settings>