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Issues and Pull Requests

New issues

Please use the issue tracker to report confirmed bugs. Do not use it to ask questions. If you are uncertain whether something is a bug, please ask on the mailing list first.

When opening a new issue,

Please state the problem clearly and provide enough context. Code examples and build transcripts are often useful when appropriately edited.
Include all relevant information needed to reproduce such as the version of sbt and Scala being used.

Finally, thank you for taking the time to report a problem.

Pull Requests

Whether implementing a new feature, fixing a bug, or modifying documentation, please work against the latest development branch (currently, 0.13). Binary compatible changes will be backported to a previous series (currently, 0.12.x) at the time of the next stable release. See below for instructions on building sbt from source.

Documentation

Documentation fixes and contributions are welcome. They are made via pull requests, as described in the previous section. See below for details on getting sbt sources and modifying the documentation.

Build from source

Install the current stable binary release of sbt (see Setup), which will be used to build sbt from source.

Get the source code.

 $ git clone git://github.com/sbt/sbt.git
 $ cd sbt

The initial branch is the development branch 0.13, which contains the latest code for the next major sbt release. To build a specific release or commit, switch to the associated tag. The tag for the latest stable release is v0.12.1:
```
 $ git checkout v0.12.1
```
Note that sbt is always built with the previous stable release. For example, the 0.13 branch is built with 0.12.1, the v0.11.2 tag is built with 0.11.1, and the v0.11.0 tag is built with 0.10.1.
To build the launcher, publish all components locally, and build documentation:
```
 $ sbt build-all
```
Alternatively, the individual commands run by build-all may be executed directly:
```
 $ sbt publish-local proguard sxr doc sphinx:mappings
```
To use this locally built version of sbt, copy your stable ~/bin/sbt script to ~/bin/xsbt and change it to use the launcher jar in <sbt>/target/. For the v0.12.1 tag, the full location is:
```
 <sbt>/target/sbt-launch-0.12.1.jar
```
If using the 0.13 development branch, the launcher is at:
```
 <sbt>/target/sbt-launch-0.13.0-SNAPSHOT.jar
```

Modifying sbt

When developing sbt itself, run compile when checking compilation only.
To use your modified version of sbt in a project locally, run publish-local. If you have modified the launcher, also run proguard.
After each publish-local, clean the ~/.sbt/boot/ directory. Alternatively, if sbt is running and the launcher hasn't changed, run reboot full to have sbt do this for you.
If a project has project/build.properties defined, either delete the file or change sbt.version to 0.13.0-SNAPSHOT.

Building Documentation

The scala-sbt.org site documentation is built using sphinx and requires some external packages to be manually installed first:

$ pip install pygments
$ pip install sphinx
$ pip install sphinxcontrib-issuetracker

To build the full site, run the make-site task, which will generate the manual, API, SXR, and other site pages in target/site/. To only work on the site and not API or SXR, run sphinx:mappings. To only build API documentation, run doc. Sphinx is not required for generating API or SXR documentation.

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