Re: [gentoo-soc] Auto dependency builder. Need some thoughts before start to code.

[Brian Dolbec]

On Sun, 2011-05-22 at 06:28 +0000, Александр Берсенев wrote:
> > What about writing the logging portion in cython so that it can have the
> > speed of c with the ease of integrating with python code.
> Interesting idea. I'll use it.
>
> > Alex, if you have any need to obtain info about the package using the
> > portage api, or gentoolkit api's I can help you with that.
> Ok, I will ask you If I will be having a problem with api.
> I wonder why depgraph command produce such huge output for any
> packages: equery g --depth=0 grub.
>
> Best,
> Alexander Bersenev
>

Because nearly every pkg will depend on something else, so the list will
keep growing till nearly everything installed is listed.  So use
reasonable limits.

anyway for your use you will probably want to use the python api
directly.  

brian@big_daddy  $ python
Python 2.6.6 (r266:84292, Mar  5 2011, 10:27:05) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from gentoolkit.dependencies import Dependencies
>>> D=Dependencies('sys-boot/grub-0.97-r10')
>>> deps = D.graph_depends(max_depth=4)
>>> len(deps)
12
>>> deps
[(2, None), (3, <Package u'app-misc/pax-utils-0.2.3'>), (3, <Package
u'sys-apps/checkpolicy-2.0.21'>),
(2, <Package u'sec-policy/selinux-base-policy-20080525-r1'>), (1,
<Package u'sec-policy/selinux-gpm-20080525'>),
(0, <Package u'sys-libs/gpm-1.20.6'>), (3, <Package
u'app-xemacs/ruby-modes-1.04'>),
(3, <Package u'dev-libs/libpcre-8.12'>), (2, <Package
u'dev-lang/swig-2.0.4_pre12643'>),
(2, None), (1, <Package u'virtual/libintl-0'>), (0, <Package
u'sys-apps/findutils-4.5.10'>)]
>>> def printout(deps):
...     for depth, pkg in deps:
...             if pkg:
...                     print pkg.cpv, " depth =", depth
... 
>>> printout(deps)
app-misc/pax-utils-0.2.3  depth = 3
sys-apps/checkpolicy-2.0.21  depth = 3
sec-policy/selinux-base-policy-20080525-r1  depth = 2
sec-policy/selinux-gpm-20080525  depth = 1
sys-libs/gpm-1.20.6  depth = 0
app-xemacs/ruby-modes-1.04  depth = 3
dev-libs/libpcre-8.12  depth = 3
dev-lang/swig-2.0.4_pre12643  depth = 2
virtual/libintl-0  depth = 1
sys-apps/findutils-4.5.10  depth = 0
>>> deps = D.graph_depends(max_depth=1)
>>> printout(deps)
sys-libs/gpm-1.20.6  depth = 0
sys-apps/findutils-4.5.10  depth = 0
sys-apps/help2man-1.39.1  depth = 0
sys-devel/autoconf-wrapper-10-r1  depth = 0
app-arch/xz-utils-5.0.2  depth = 0
>>> deps = D.graph_depends(max_depth=6)
>>> printout(deps)
app-xemacs/ruby-modes-1.04  depth = 5
dev-libs/libpcre-8.12  depth = 5
sys-devel/gcc-4.5.2  depth = 5
dev-python/python-docs-2.7.1  depth = 5
dev-lang/python-2.7.1-r2  depth = 4
sys-apps/sed-4.2.1-r1  depth = 5
sys-devel/flex-2.5.35_p10  depth = 5
sys-libs/libcap-2.20  depth = 5
sys-freebsd/freebsd-lib-8.0  depth = 5
app-misc/pax-utils-0.2.3  depth = 5
sys-libs/timezone-data-2011g  depth = 4
sec-policy/selinux-openldap-20080525  depth = 5
sys-kernel/linux-headers-2.6.38  depth = 4
sys-auth/openpam-20071221  depth = 5
sys-kernel/linux-headers-2.6.38  depth = 4
dev-python/setuptools-0.6.16  depth = 5
sys-devel/binutils-2.21  depth = 5
sys-auth/pam_krb5-4.4  depth = 5
app-editors/gvim-7.3.189  depth = 5
app-vim/pam-syntax-20060424  depth = 4
dev-python/python-docs-3.2  depth = 5
dev-lang/python-3.2  depth = 4
dev-python/python-docs-2.6.6  depth = 5
dev-python/python-docs-2.5.4-r1  depth = 5
dev-lang/python-2.5.4-r4  depth = 4
app-misc/pax-utils-0.2.3  depth = 3
sys-devel/bison-2.5  depth = 4
sys-apps/checkpolicy-2.0.21  depth = 3
sec-policy/selinux-base-policy-20080525-r1  depth = 2
sec-policy/selinux-gpm-20080525  depth = 1
sys-libs/gpm-1.20.6  depth = 0
sys-apps/findutils-4.5.10  depth = 0
>>>

-- 
Brian Dolbec <brian.dolbec@×××××.com>