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************
Introduction
************
Overview
===================================
Auto dependency (autodep) builder is a tool for the analysis of accessed files during
the build of a package. It also can be used for runtime dependencies analysis.
The tool can trace, log and block access to files of given packages.
It is released under GNU GPL license.
Status
===================================
Autodep is in active developing.
Installing
===================================
1. The package is available in "neurogeek" overlay. To add this overlay use:
.. code-block:: none
layman -a neurogeek
2. Make sure that "source /var/lib/layman/make.conf" is in your /etc/make.conf
3. To install the package type:
.. code-block:: none
emerge autodep
Running
===================================
.. program:: autodep
.. code-block:: none
autodep [options] <command>
.. cmdoption:: --help, -h
Show this help message and exit.
.. cmdoption:: -b, --block
strict mode: Deny all access to files from non-dependency packages.
.. cmdoption:: --blockpkgs=PACKAGES
Block access to files from this packages.
.. cmdoption:: -f, --files
Show all files, accessed and missing (not found).
.. cmdoption:: -v, --verbose
Show non-important packages, unknown packages and unknown building stages.
.. cmdoption:: --nocolor, -C
Don't colorize output
.. cmdoption:: --hooklib
Use LD_PRELOAD logging approach (default).
.. cmdoption:: --fusefs
Use FUSE logging approach (slow, but reliable).
Example: showfsevents.py -b lsof,cowsay emerge bash
.. note::
You can use **emerge_strict** command to check dependencies of a packages.
The command has same syntax as emerge and launches bundled emerge with
*depcheckstrict* feature.
Hooklib vs Fusefs
===================================
+------------------------------------------------+-------------+---------------+
| | Hooklib | FuseFS |
+================================================+=============+===============+
| Who can use this approach? | **Any user**| Only root |
+------------------------------------------------+-------------+---------------+
| Does approach allows to block access to files? | **YES** | **YES** |
+------------------------------------------------+-------------+---------------+
| Is the overhead in performance noticeable? | **NO** | YES [#f1]_ |
+------------------------------------------------+-------------+---------------+
| What events are logged? | Most [#f2]_| **ALL** |
+------------------------------------------------+-------------+---------------+
| When is it recomended to use an approach? | Analysis | Analysis |
| | of | of *runtime* |
| | *buildtime* | dependencies |
| | dependencies| |
+------------------------------------------------+-------------+---------------+
| Are there any pre-requirements | **NO** | FUSE must be |
| for using an approach? | | enabled in |
| | | kernel |
+------------------------------------------------+-------------+---------------+
.. rubric:: Notes
.. [#f1] FUSE filesystems are slower than a normal one. A Program accesses many files
while launching, so this will take more time than usual.
.. [#f2] Loading of Dynamic libraries and direct syscalls will not be logged.
Examples
===================================
.. rubric:: 1. Get the potential dependencies for net-irc/xchat:
.. code-block:: none
autodep emerge net-irc/xchat
.. rubric:: 2. Get the potential dependencies for net-irc/xchat, blocking
x11-misc/util-macros package:
.. code-block:: none
autodep emerge --blockpkgs x11-misc/util-macros emerge net-irc/xchat
.. rubric:: 3. Get the potential dependencies for net-irc/xchat, and show files
accessed:
.. code-block:: none
autodep --files emerge net-irc/xchat
.. rubric:: 4. Get the runtime dependencies of a xchat and show accessed files:
.. code-block:: none
autodep --fusefs --files xchat
Indices and tables
==================
* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`
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