xbps/README.md

## XBPS

The X Binary Package System (in short XBPS) is a binary package system
**designed and implemented from scratch**. Its goal is to be fast, easy to use,
bug-free, featureful and portable as much as possible.

The XBPS code is totally **compatible with POSIX/SUSv2/C99 standards**, and
released with a **Simplified BSD license (2 clause)**. There is a well
documented API provided by the XBPS Library that is the basis for its frontends
to handle binary packages and repositories. Some highlights:

 * Supports **multiple local and remote repositories** (HTTP/HTTPS/FTP).
 * **RSA signed remote repositories** (NEW in 0.27).
 * **SHA256 hashes** for package metadata, files and binary packages.
 * Supports **package states** (ala dpkg) to mitigate broken package
   installs/updates.
 * Ability to **resume** partial package install/updates.
 * Ability to **unpack only files that have been modified** in package updates.
 * Ability to use **virtual packages**.
 * Ability to **check for incompatible shared libraries in reverse
   dependencies**.
 * Ability to **replace packages**.
 * Ability to **put packages on hold** (to never update them. NEW in 0.16).
 * Ability to **preserve/update configuration files**.
 * Ability to **force reinstallation** of any installed package.
 * Ability to **downgrade any** installed package.
 * Ability to **execute pre/post install/remove/update scriptlets**.
 * Ability to **check package integrity**: missing files, hashes, missing or
   unresolved (reverse)dependencies, dangling or modified symlinks, etc.
 * **Low memory** footprint.
 * **Fast** dependency resolver and sorting algorithms.

### Getting source code

Starting with **0.26** there are not source tarballs anymore. **git** must be
used to clone the repository with the appropiate tag. The latest stable version
can be fetched with:

    $ git clone -b <version> git://github.com/xtraeme/xbps.git

See `git tag -l` to list all available stable releases.

### Build requirements

To build this you'll need:

  - A C99 compiler (clang and gcc tested)
  - [GNU make](http://www.gnu.org/software/make/)
  - [pkg-config](http://www.freedesktop.org/wiki/Software/pkg-config/)
  - [zlib](http://www.zlib.net)
  - [openssl](http://www.openssl.org)
  - [libarchive >= 2.8.0](http://www.libarchive.org)

and optionally:

  - [graphviz](http://www.graphviz.org) and [doxygen](http://www.doxygen.org)
    (--enable-api-docs) to build API documentation.
  - [atf >= 0.15](http://code.google.com/p/kyua) (--enable-tests) to build the
    Kyua test suite.

### Build instructions

Standard configure script (not generated by GNU autoconf).

```
./configure --prefix=/blah
make -jX
make install
```

By default PREFIX is set `/usr/local` and may be changed by setting `--prefix`
in the `configure` script. The `DESTDIR` variable is also supported at the
install stage.

There are some more options that can be tweaked, see them with
`./configure --help'.

Good luck!