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The properties act like variables in a program. The script is better written using properties: Location of the source code, we would need to make multiple changes to the build script. The script will work, but if we would like to see compilation warnings, or change the We therefore write the targets in the following Moment we prefer not to see warnings generated at compile time. For example, we might have two separate compilation targets in the same script, and for the One way that this problem arises in ant build scripts is through the use of parameters supplied toĪnt targets. Is correct, or even if they should be the same at all.
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And if an inconsistencyĬreeps in, and you look at the code some time later, you may no longer be sure which version of the information Then a single change to that information requires multiple changes to the code. If the same information appears in multiple places, Information becomes very difficult to maintain. One of those basic principles is to avoid duplicating information. In many respects, the same basic principles apply to an ant script as to a piece of program code. Script is critical to your project, so take good care of it - refactor and nurse it at least as well as you would your source code.ĭON'T replicate information several times in the same script. In particular, don't be satisfied that your ant script is correct because it appeared to work correctly on one occasion. Still needs work, then you are storing an inevitable problem for later.
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On the other hand, if you continue to develop using an ant script that If you get the dependencies right at the beginning of a project, and maintain their correctness throughout, you will grow to trust your build and
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It's obvious, isn't it? But ant scripts grow to become complex beasts, and too often I've seen basic errors like missing dependencies or even dependencies running in the wrong direction. Let us know if you have some more!ĭO make sure you get your target dependencies right So here are some dos and don'ts for using ant.
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The purpose of this document is not toĮxplain the basics of how to use ant, but to give some tips which youĬannot easily find in the online documentation. Of predefined tasks and is expressed in an XML syntax. Its a bit like the old make command popularised under UNIX, but has a rich set Īpache Ant is probably the most popular build tool for Java. With the open-source database MySQL in mind. Open Source Tools for Developers: Why They Matterįrom a developer's point of view use of open-source tools has advantages beyond the obvious economic ones.
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