Gradle task - pass arguments to Java application

Question

I have a Java application that runs with a custom gradle task and the application requires some arguments upon being invoked  These are   programName   string   -f filename   -d key   -h  Options      string         Message to be used      -d key         Use default messages  key must be s hort   m edium  or l ong       -f filename    Use specified file as input      -h             Help dialog    Gradle task looks like   task run  type  JavaExec       description    Secure algorythm testing      main    main Test      classpath   sourceSets main runtimeClasspath     I ve tried running gradle run -h and it does not work

User · Answer

Gradle 4 9  gradle run --args  arg1 arg2   This assumes your build gradle is configured with the Application plugin  Your build gradle should look similar to this  plugins        Implicitly applies Java plugin   id   application     application        URI of your main class application s entry point  required    mainClassName    org gradle sample Main     Pre-Gradle 4 9 Include the following in your build gradle  run       if  project hasProperty  quot appArgs quot              args Eval me appArgs           Then to run  gradle run -PappArgs  quot   arg1    args2   quot

User · Answer

You need to pass them as args to the task using project properties  something like   args    project property  h      added to your task definition  see the dsl docs   Then you can run it as   gradle -Ph run

User · Answer

Since Gradle 4 9  the command line arguments can be passed with --args  For example  if you want to launch the application with command line arguments foo --bar  you can use     gradle run --args  foo --bar    See Also Gradle Application Plugin  How to upgrade Gradle wrapper

User · Answer

If you want to use the same set of arguments all the time  the following is all you need   run       args     --myarg1    --myarg2

User · Answer

You can find the solution in Problems passing system properties and parameters when running Java class via Gradle   Both involve the use of the args property  Also you should read the difference between passing with -D or with -P that is explained in the Gradle documentation

User · Answer

Sorry for answering so late   I figured an answer alike to  xlm  s   task run  type  JavaExec  dependsOn  classes       if project hasProperty  myargs             args myargs split                 description    Secure algorythm testing      main    main Test      classpath   sourceSets main runtimeClasspath     And invoke like   gradle run -Pmyargs -d s

User · Answer

Of course the answers above all  do the job  but still i would like to use something like  gradle run path1 path2   well this can t be done  but what if we can    gralde run --- path1 path2   If you think it is more elegant  then you can do it  the trick is to process the command line and modify it before gradle does  this can be done by using init scripts  The init script below    Process the command line and remove --- and all other arguments following  ---  Add property  appArgs  to gradle ext   So in your run task  or JavaExec  Exec  you can   if  project gradle hasProperty  appArgs                      List lt String gt  appArgs   project gradle appArgs                   args appArgs       The init script is   import org gradle api invocation Gradle  Gradle aGradle   gradle  StartParameter startParameter   aGradle startParameter  List tasks   startParameter getTaskRequests     List lt String gt  appArgs   new ArrayList lt  gt     tasks forEach      List lt String gt  args   it getArgs         Iterator lt String gt  argsI   args iterator        while  argsI hasNext             String arg   argsI next              remove  ---  and all that follow       if  arg     ---              argsI remove              while  argsI hasNext                   arg   argsI next                    and add it to appArgs             appArgs add arg                argsI remove                               aGradle ext appArgs   appArgs   Limitations    I was forced to use  ---  and not  --      You have to add some global init script    If you don t like global init script  you can specify it in command line  gradle -I init gradle run --- f  temp x xml   Or better add an alias to your shell   gradleapp run --- f  temp x xml

[java] Gradle task - pass arguments to Java application

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