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************
Introduction
************
Overview
===================================
Auto dependency builder is a tool for analysis files accessed during
building a package. It also can be used for buildtime and runtime dependency
analysis.
The tool can block an access to files of defined packages.
It is released under GNU GPL license.
Status
===================================
Autodep is in active developing.
Installing
===================================
.. note::
TODO: make an overlay and ebuild
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 non-dependency packages
.. cmdoption:: --blockpkgs=PACKAGES
block an access to files from this packages
.. cmdoption:: -f , --files
show accessed files and not founded files
.. cmdoption:: -v , --verbose
show non-important packages, show unknown package and unknown stage
.. cmdoption:: -C , --nocolor
don't output color
.. 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
Hooklib vs Fusefs
===================================
+------------------------------------------------+-------------+---------------+
| | Hooklib | Fusefs |
+================================================+=============+===============+
| Who can use this approach? | **Any user**| Only root |
+------------------------------------------------+-------------+---------------+
| Is approach allows blocking an access to files?| **YES** | **YES** |
+------------------------------------------------+-------------+---------------+
| Is overhead in performance big? | **NO** | YES [#f1]_ |
+------------------------------------------------+-------------+---------------+
| What events are logged? | Most [#f2]_| **ALL** |
+------------------------------------------------+-------------+---------------+
| When is it recomended to use an approach? | For analysis| For analysis |
| | of | of *runtime* |
| | *buildtime* | dependencies |
| | dependencies| |
+------------------------------------------------+-------------+---------------+
| Is any pre-requirements for using an approach? | **NO** | FUSE must be |
| | | enabled in |
| | | kernel |
+------------------------------------------------+-------------+---------------+
.. rubric:: Notes
.. [#f1] Fuse file system is slower than normal one. Program reads 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 of a xchat package:
.. code-block:: none
autodep emerge xchat
.. rubric:: 2. Get the potential dependencies of a xchat package, blocking
x11-misc/util-macros package:
.. code-block:: none
autodep emerge --block x11-misc/util-macros emerge xchat
.. rubric:: 3. Get the potential dependencies of a xchat package, and show files
accessed:
.. code-block:: none
autodep --files emerge xchat
.. rubric:: 4. Get the runtime dependencies of a xchat and show files
accessed:
.. code-block:: none
autodep --fusefs --files xchat
Indices and tables
==================
* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`
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