Fails behind proxy / download mechanism

[bmarwell]

Hi,

I cannot directly connect to maven central, but I use a mirror repository.
However, I cannot use it as the URL is hardcoded.

Also, you don't use maven mechanisms and http. The bug report for this is here: os72/protoc-jar#55

This issue is for to keep track of inclusion of the fix in the library into this plugin.

[os72]

Configuring parameter protocArtifact will make the plugin use standard maven resolution (instead of protoc-jar download), that may work for you

[bmarwell]

Good to know. My maven build actually froze. Even with -X I wasn't able to see what's going on.
It should print a message like: going to download from.... Your maven repo, directly, etc. and a link to the wiki page.

I'll look into prototyping something in the other issue.

[bmarwell]

@os72 if I configure protocArtifact, I will get a NullPointerException:

[INFO] Resolving artifact: com.google.protobuf:protoc:3.6.1, platform: linux-x86_64
protoc-jar: executing: [/tmp/protoc2145031032623482805.exe, --version]
libprotoc 3.6.1
[INFO] Protoc command: /tmp/protoc2145031032623482805.exe
[INFO] Additional include types: /tmp/protocjar1243971852487828800/include
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] myproject-parent - Definitions                 ..... SUCCESS [  0.900 s]
[INFO] Protobuf classes for Client and Server communication FAILURE [  0.277 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.217 s
[INFO] Finished at: 2018-09-07T14:26:54+02:00
[INFO] Final Memory: 37M/259M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.github.os72:protoc-jar-maven-plugin:3.6.0.1:run (default) on project wire-api: Execution default of goal com.github.os72:protoc-jar-maven-plugin:3.6.0.1:run failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.github.os72:protoc-jar-maven-plugin:3.6.0.1:run (default) on project wire-api: Execution default of goal com.github.os72:protoc-jar-maven-plugin:3.6.0.1:run failed.
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
        at java.lang.reflect.Method.invoke(Method.java:508)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal com.github.os72:protoc-jar-maven-plugin:3.6.0.1:run failed.
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
        ... 20 more
Caused by: java.lang.NullPointerException
        at com.github.os72.protocjar.Protoc.extractStdTypes(Protoc.java:378)
        at com.github.os72.protocjar.maven.ProtocJarMojo.performProtoCompilation(ProtocJarMojo.java:388)
        at com.github.os72.protocjar.maven.ProtocJarMojo.execute(ProtocJarMojo.java:327)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        ... 21 more

Here is my config:

      <plugin>
        <groupId>com.github.os72</groupId>
        <artifactId>protoc-jar-maven-plugin</artifactId>
        <version>3.6.0.1</version>
        <configuration>
          <!-- if it was set to true, it'd try to download it directly. -->
          <!-- <protocVersion>${dependency.protoc.version}</protocVersion> -->
          <includeStdTypes>true</includeStdTypes>

          <!-- get a special artifact from maven.-->
          <protocArtifact>com.google.protobuf:protoc:${dependency.protoc.version}</protocArtifact>

          <outputTargets>
            <outputTarget>
              <type>java</type>
              <outputDirectory>target/generated-sources/protobuf-java</outputDirectory>
            </outputTarget>
            <outputTarget>
              <type>js</type>
              <outputDirectory>target/generated-sources/protobuf-js</outputDirectory>
            </outputTarget>
            <outputTarget>
              <type>grpc-java</type>
              <pluginArtifact>io.grpc:protoc-gen-grpc-java:${dependency.grpc.version}</pluginArtifact>
              <outputDirectory>target/generated-sources/grpc-java</outputDirectory>
            </outputTarget>
          </outputTargets>
        </configuration>
        <executions>
          <execution>
            <phase>generate-sources</phase>
            <goals>
              <goal>run</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

However, if if uncomment the protocVersion tag, it will work again.

[os72]

Yes we could call it a bug :)
See if includeMavenTypes may work in your case (in a way it obsoletes includeStdTypes)

[os72]

Assuming closed