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1
2 A N T
3
4
5 What is it?
6 -----------
7
8 Ant is a Java based build tool. In theory it is kind of like "make"
9 without makes wrinkles and with the full portability of pure java code.
10
11
12 Why?
13 ----
14
15 Why another build tool when there is already make, gnumake, nmake, jam,
16 and others? Because all of those tools have limitations that its original
17 author couldn't live with when developing software across multiple platforms.
18
19 Make-like tools are inherently shell based. They evaluate a set of
20 dependencies and then execute commands not unlike what you would issue on a
21 shell. This means that you can easily extend these tools by using or writing
22 any program for the OS that you are working on. However, this also means that
23 you limit yourself to the OS, or at least the OS type such as Unix, that you
24 are working on.
25
26 Makefiles are inherently evil as well. Anybody who has worked on them for any
27 time has run into the dreaded tab problem. "Is my command not executing
28 because I have a space in front of my tab!!!" said the original author of Ant
29 way too many times. Tools like Jam took care of this to a great degree, but
30 still use yet another format to use and remember.
31
32 Ant is different. Instead a model where it is extended with shell based
33 commands, it is extended using Java classes. Instead of writing shell
34 commands, the configuration files are XML based calling out a target tree
35 where various tasks get executed. Each task is run by an object which
36 implements a particular Task interface.
37
38 Granted, this removes some of the expressive power that is inherent by being
39 able to construct a shell command such as `find . -name foo -exec rm {}` but
40 it gives you the ability to be cross platform. To work anywhere and
41 everywhere. And hey, if you really need to execute a shell command, Ant has
42 an exec rule that allows different commands to be executed based on the OS
43 that it is executing on.
44
45 The Latest Version
46 ------------------
47
48 Details of the latest version can be found on the Apache Ant
49 Project web site <http://ant.apache.org/>.
50
51
52 Documentation
53 -------------
54
55 Documentation is available in HTML format, in the docs/ directory.
56 For information about building and installing Ant, see
57 docs/manual/index.html
58
59
60 Licensing
61 ---------
62
63 This software is licensed under the terms you may find in the file
64 named "LICENSE" in this directory.
65
66 This distribution includes cryptographic software. The country in
67 which you currently reside may have restrictions on the import,
68 possession, use, and/or re-export to another country, of
69 encryption software. BEFORE using any encryption software, please
70 check your country's laws, regulations and policies concerning the
71 import, possession, or use, and re-export of encryption software, to
72 see if this is permitted. See <http://www.wassenaar.org/> for more
73 information.
74
75 The U.S. Government Department of Commerce, Bureau of Industry and
76 Security (BIS), has classified this software as Export Commodity
77 Control Number (ECCN) 5D002.C.1, which includes information security
78 software using or performing cryptographic functions with asymmetric
79 algorithms. The form and manner of this Apache Software Foundation
80 distribution makes it eligible for export under the License Exception
81 ENC Technology Software Unrestricted (TSU) exception (see the BIS
82 Export Administration Regulations, Section 740.13) for both object
83 code and source code.
84
85 The following provides more details on the included cryptographic
86 software:
87
88 For the SSH family of tasks (<sshexec> and <scp>) Ant requires the
89 JSch <http://www.jcraft.com/jsch/index.html> library as well as the
90 Java Cryptography extensions
91 <http://java.sun.com/javase/technologies/security/>. Ant does not
92 include these libraries itself, but is designed to use them.
93
94 Thanks for using Ant.
95
96 The Apache Ant Project
97 <http://ant.apache.org/>
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