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#general
  • b

    better-park-26723

    01/28/2016, 12:16 AM
    And my problem was that I thought a task and target type was the same thing
  • b

    better-park-26723

    01/28/2016, 12:16 AM
    That's why I foolishly created a HelloWorld task and then tried to register it
  • b

    better-park-26723

    01/28/2016, 12:17 AM
    So, if I were to create a "hello world" target type, how would I do that?
  • b

    bored-art-40741

    01/28/2016, 12:17 AM
    You can define it in the same module as your task
  • b

    bored-art-40741

    01/28/2016, 12:17 AM
    It's literally anything that subclasses 
    Target
  • b

    bored-art-40741

    01/28/2016, 12:17 AM
    You can add more stuff to it later
  • b

    bored-art-40741

    01/28/2016, 12:17 AM
    But for now you can leave the implementation empty
  • b

    bored-art-40741

    01/28/2016, 12:18 AM
    Just to get started
  • b

    better-park-26723

    01/28/2016, 12:18 AM
    https://pantsbuild.github.io/howto_plugin.html is an example of defining a target type
  • b

    bored-art-40741

    01/28/2016, 12:18 AM
  • b

    better-park-26723

    01/28/2016, 12:18 AM
    by extending a target type (which I thought was a task)
  • b

    bored-art-40741

    01/28/2016, 12:19 AM
    Yeah so tasks operate on targets, but neither is a factory for the other or anything like that
  • b

    bored-art-40741

    01/28/2016, 12:19 AM
    They are basically unrelated--a bunch of targets are handed to a task, the task does what it wants with them
  • b

    bored-art-40741

    01/28/2016, 12:19 AM
    And often a task has a closely associated target type that it wants to operate over
  • b

    bored-art-40741

    01/28/2016, 12:19 AM
    But there's nothing special about that
  • b

    bored-art-40741

    01/28/2016, 12:20 AM
    It figures it out by explicitly type-checking against the targets it's handed
  • b

    better-park-26723

    01/28/2016, 12:21 AM
    Who declares that the 
    java_library
    target type will compile .java files?
  • b

    bored-art-40741

    01/28/2016, 12:22 AM
    No one. The 
    ZincCompile
    or 
    JavaCompile
    task simply only pays attention to targets of that type
  • b

    bored-art-40741

    01/28/2016, 12:22 AM
    By explicitly type checking each target it's handed
  • b

    bored-art-40741

    01/28/2016, 12:22 AM
    And effectively ignoring the rest
  • b

    better-park-26723

    01/28/2016, 12:24 AM
    So I'd define a 
    war
    target type. I'd also define a 
    WarCreate
    task which filters for targets with the 
    war
    type and takes action on them?
  • b

    bored-art-40741

    01/28/2016, 12:24 AM
    Yup
  • b

    better-park-26723

    01/28/2016, 12:24 AM
    ungh https://pantsbuild.github.io/dev_tasks.html
    GitHub Pages is temporarily down for maintenance.
  • b

    bored-art-40741

    01/28/2016, 12:25 AM
    wow
  • b

    better-park-26723

    01/28/2016, 12:25 AM
    opens dev_tasks.md
  • b

    better-park-26723

    01/28/2016, 12:27 AM
    I feel like the documentation would be greatly improved with a working toy example of a custom compiler
  • b

    better-park-26723

    01/28/2016, 12:27 AM
    All of the checked in backends are heavily featureful tasks; x extends y extends z
  • b

    better-park-26723

    01/28/2016, 12:27 AM
    it's tough to see the forest for the trees
  • w

    witty-crayon-22786

    01/28/2016, 12:27 AM
    ./pants markdown --open src/python/pants/docs:dev_tasks
  • b

    better-park-26723

    01/28/2016, 12:28 AM
    indeed
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