Building genrule() reports that jar command not found.

[Leo Yin]

Hi,

My BUILD file has a genrule() as follows:

genrule(

   name = "gen_ism_encry_jar",

   srcs = [":Combine_complieAndJar"],

   outs = ["ism_encry.jar"],

   cmd = "cp $(location :Combine_complieAndJar) $@; jar uf $@ " + baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

)

When building bazel reports that jar command not found. However, jar is installed and it is in the PATH (executing 'which jar' will print '/usr/local/java/jdk1.8.0_77/bin/jar').

I used the bazel build command with '-s' option and got the failed command as follows:

(cd /root/.cache/bazel/_bazel_root/62a52d88f2594916d0a2e0364313b1a5/SPA && \

  exec env - \

    PATH=/usr/local/java/bin:/usr/local/java/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/java/jdk1.8.0_77/bin:/usr/local/java/jdk1.8.0_77/jre//bin:/usr/local/apache-ant/bin:/usr/local/java/jdk1.8.0_77/bin:/usr/local/java/jdk1.8.0_77/jre//bin:/usr/local/apache-ant/bin:/usr/local/java/jdk1.8.0_77/bin:/usr/local/java/jdk1.8.0_77/jre//bin:/usr/local/apache-ant/bin:/usr/local/java/jdk1.8.0_77/bin:/usr/local/java/jdk1.8.0_77/jre//bin:/usr/local/apache-ant/bin \

  /bin/bash -c 'source external/bazel_tools/tools/genrule/genrule-setup.sh; cp bazel-out/local_linux-fastbuild/bin/libCombine_complieAndJar.jar bazel-out/local_linux-fastbuild/genfiles/ism_encry.jar; 

  jar uf bazel-out/local_linux-fastbuild/genfiles/ism_encry.jar systemAnalyzer/Install_Moudle/ISM-Encry/src/log4j.properties')

To my surprise, directly executing the above command in the shell returns 0.

In another machine, in which jar is installed in /usr/bin/jar from Oracle jdk 1.8, this failure is not reported.

Can anyone give some help?

Thank you very much!

Regards,

Leo

[Brian Silverman]

Sounds like the issue is the sandbox including /usr/bin but not /usr/local. Adding '@local_jdk//:jar' to your srcs should fix it.

For future reference, --sandbox_debug in addition to --verbose_failures is helpful for debugging this kind of issue.

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[Leo Yin]

Hi Brian,

I modified BUILD as follows:

 genrule(

    name = "gen_ism_encry_jar",

    srcs = [

      ":Combine_complieAndJar",

      baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

      "@local_jdk//:jar",

   ],

   outs = ["ism_encry.jar"],

   cmd = "cp $(location :Combine_complieAndJar) $@; jar uf $@ " + baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

)

Bazel still reported jar could not be found. 

The option --sandbox_debug lets bazel print directories mounted in the sandbox, among which there is no '/usr/local'.

How can '/usr/local' be included into sandbox?

Thank you very much.

-Leo

在 2016年4月17日星期日 UTC+8下午9:20:10，Brian Silverman写道：

[Kristina Chodorow]

You have to pull the jar location from the srcs list, so change your cmd to:

 "cp $(location :Combine_complieAndJar) $@; $(location @local_jdk//:jar) uf $@ " + baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

Alternatively, you can include /usr/local/ by creating a new_local_repository (see http://bazel.io/docs/external.html) but that's probably more work than you want to do to just get jar.

To view this discussion on the web visit https://groups.google.com/d/msgid/bazel-discuss/2950564a-def8-4d80-aaca-6b810503109a%40googlegroups.com.

[Kristina Chodorow]

Also, technically @local_jdk//:jar should probably be listed in tools (http://bazel.io/docs/be/general.html#genrule.tools), but it doesn't really matter in this case.

[Leo Yin]

Hi Kristina,

genrule() is modified as follows.

genrule(

  name = "gen_ism_encry_jar",

  srcs = [

    ":Combine_complieAndJar",

    baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

  ],

  outs = ["ism_encry.jar"],

  tools = ["@local_jdk//:jar"],

  cmd = "cp $(location :Combine_complieAndJar) $@; $(location @local_jdk//:jar) uf $@ " + baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties",

)

Bazel reports "external/local_jdk/bin/jar: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory".

Setting cmd = "cp $(location :Combine_complieAndJar) $@; /usr/local/java/jdk1.8.0_77/bin/jar uf $@ " + baseDir + "Install_Moudle/ISM-Encry/src/log4j.properties", the same error is reported.

Both $(bazel info output_base)/external/local_jdk/bin/jar and /usr/local/java/jdk1.8.0_77/bin/jar can be executed successfully in the shell.

I also included /usr/local/java/jdk1.8.0_77/bin/jar using new_local_repository()：

# WORKSPACE

new_local_repository(

  name = "local_jdk8_tools",

  path = "/usr/local/java/jdk1.8.0_77/bin",

  build_file = "local_jdk8.build",

)

# local_jdk8.build

filegroup(

  name = "jar_tool",

  srcs = ["jar"],

  visibility = ["//visibility:public"],

)

libjli.so still cannot be found.  Further more, including libjii.so by using new_local_repository(), it still cannot be found.

Could any advice be provided? 

Thank you very much.

-Leo

在 2016年4月18日星期一 UTC+8下午10:01:22，Kristina Chodorow写道：

[Brian Silverman]

Try adding '@local_jdk//:jdk-default' to tools too.

To view this discussion on the web visit https://groups.google.com/d/msgid/bazel-discuss/0b6611b2-97bf-4419-9ac6-07461cc80fe8%40googlegroups.com.

[Leo Yin]

Hi,

I reinstalled jdk8 in /usr/bin and solved the problem. 

Thank all of you very much for the help!

-Leo

在 2016年4月19日星期二 UTC+8上午11:27:18，Brian Silverman写道：