Problems with running jplag-2.11.8-SNAPSHOT-jar-with-dependencies.jar

[tsferreira]

I downloaded this version of JPlag and tried to run it with the command:
java -jar jplag-2.11.8-SNAPSHOT-jar-with-dependencies.jar -l c -s mydir
and I got:
"Error: Illegal value: Language instantiation failed: Unknown language "c" ".
The same happened with "-l cpp". It seems to work only for the several versions of Java.

On the other hand, option "-p ?" produces:
"Error: No language found...".

I also tried to recompile JPlag by running: "mvn package" which produced a file: jplag-2.11.8-SNAPSHOT.jar. When I tried to execute it using the same command above, I got:

Exception in thread "main" java.lang.NoClassDefFoundError: jplag/Language
at jplag.JPlag.main(JPlag.java:12)
Caused by: java.lang.ClassNotFoundException: jplag.Language
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 1 more

All tests were executed under Ubuntu Linux, with Maven as follows:

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T14:41:47-02:00)
Maven home: /home/tomasz/temp/apache-maven-3.3.9
Java version: 1.7.0_80, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-7-oracle/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-77-generic", arch: "i386", family: "unix"

Any help will be appreciated. I am not very knowledgeable about Java and even less about Maven ;-(.

[lama0206]

The name of the c/c++ front end is c/c++, you have to specify it that way (unfortunately, JPlag does not recognize c or cpp). The command should be java -jar jplag-2.11.8-SNAPSHOT-jar-with-dependencies.jar -l c/c++ -s mydir

Regarding your second question: The jplag jar built by mvn package does not contain any language front ends. If you want to build your own stand-alone (single-file) version of jplag, run mvn assembly:assembly inside the jplag directory.

[tsferreira]

What about:

... option "-p ?" produces:
"Error: No language found...".

[lama0206]

If you specify -p you have to specify -l somelanguage as well. Somehow the default language is not chosen, when -p is present.

[tsferreira]

I think I did not understand. I tried:

java -jar jplag-2.11.8-SNAPSHOT-jar-with-dependencies.jar -l c/c++ -p ?

and I got:

Language accepted: C/C++ Scanner [basic markup]
Command line: -l c/c++ -p ?
initialize ok
Error: "" is not a directory!

Adding a directory just changes the error message. Isn't "-p ?" supposed to list available languages?

[lama0206]

No. Starting JPLag without arguments prints the options (and the available languages). -l selects a language and -p tells JPlag what file name suffixes should be treated as files written in that langugae. So if you saved all c++ files as *.cplusplus, you would specify -l c/c++ -p cplusplus. -p ? tells JPlag to use the default file name suffixes for the chosen language.

[tsferreira]

Got it -- thanks!

[lama0206]

No problem :)

[tsferreira]

I have another question. I have the following directory structure for student's programs (example):

task_01/
    section_A/
         student_001/
               file_1.c
               file_2.c
               file.h
         student_002
               file_1.c
               file_2.c
               file.h
          .....   more students
    section_B/
         student_101/
               file_1.c
               file_2.c
               file.h
          .....   more students
     ..... more sections

I would like to run JPlag on all programs in all sections, i.e., I would like to specify something equivalent to:

    java -jar jplag-2.11.8-SNAPSHOT-jar-with-dependencies.jar -l c/c++  task_01/*/*     

Is there any parameter combination that does it?

[lama0206]

I guess the simplest way is to remove the section_* directories and move all student_* directories to task_01. Then add -s to the command line arguments if there are sub-directories below student_* and run JPlag on task_01

[tsferreira]

Yes, of course, but I can't change my directory structure which is part of a program submission system. I guess I will have to copy all submissions into another directory.

Thanks anyway!

[brun0xff]

What is error?
no main manifest attribute, in python-3-0.0.1-SNAPSHOT-jar-with-dependencies.jar

[SfarwaB1994]

I want to run jpal for assembly codes, what should i use after -l ???????