Does pacman ever check _all_ dependencies?

Hi,
I've been thinking about this for some time, and tried to find the answer on the forum to no avail. So, the question is this: does pacman ever check the consistency of dependencies among all the installed packages?
The reason for my asking is mostly due to the existence of the --nodeps option when removing packages. I think the answer to my question is "no", since I just tested it by removing wget (needed by hwd and abcde on my system) with the --nodeps option, and then did a pacman -Syu. pacman did not see that a dependency was missing - not very surprisingly, since the packages depending on wget were up to date.
Now, is there any option that makes pacman do a full dependency check on the system? If there isn't, I would very much welcome one. Or, perhaps even better IMO, if pacman did that when doing a full system upgrade (-Su) - at least that it notified the user that some dependencies were missing (if any) and asked whether the user wanted to install them.
Since I haven't found an existing tool to this end, I wrote a python script for this some time ago; chkpkgs.py. Sorry if the code isn't up to python standards - I'm still learning
EDIT: Changed the subject to something smarter
EDIT 2: Posted an updated version of chkpkgs.py in the pastebin. Now it does not use the REQUIREDBY field, but creates this info from the DEPENDS info.
Last edited by Bebo (2007-07-04 07:57:40)

Bebo wrote:Just a remark on the script; it is one or two months old and I had to recall what I had done, to better answer shining's comment. The requiredby information is _only_ used to find the "solitary" packages, i.e. those that don't depend on any other package && are not required by any other package. The provided/unrequired and required/unprovided packages are found only by looking at what packages are installed on the system and the dependencies of each installed package. (Maybe it would be better to find the solitary packages by this info alone, too. I'll see if I get around to it, some time )
As you said your script computes the RequiredBy field again, but this information is already in the local db, example :
pacman -Qi filesystem | grep Required
Required By : fakeroot hal slocate
pacman uses this information for finding which packages are not required by any others, while your script does not.
So they find nearly the same result, except for 3 packages. But I believe it's my database which is broken, and that for these 3 packages, the RequiredBy field is wrong :
LANG=C pacman -Qi libnetworkmanager pkgconfig xulrunner | grep -E "Name|Required"
Name : libnetworkmanager
Required By : pidgin
Name : pkgconfig
Required By : sshfs
Name : xulrunner
Required By : kazehakase
LANG=C pacman -Qi pidgin sshfs kazehakase | grep -E "Name|Depends"
Name : pidgin
Depends On : startup-notification gtkspell libxss gstreamer0.10
Name : sshfs
Depends On : fuse glib2 openssh
Name : kazehakase
Depends On : osb-browser-svn osb-jscore-svn osb-nrcit-svn
eg libnetworkmanager is required by pidgin, but pidgin doesn't depend on anything related to libnetworkmanager, as far as I can tell. Same for two others.
Since your script doesn't use the RequiredBy field, but compute it, it shows these 3 packages : libnetworkmanager, pkgconfig and xulrunner.
Is this more clear (I'm not sure ) ?

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Does Pacman Have A Command To Check For Left Over Dependencies?

Does pacman have a command to check for left over dependencies?
I know that when you remove something it's checking for dependencies and I've seen it show these before, but I swear I removed something that had dependencies and it don't show any and just removed only the single program.
So basically I wanted to know if there are any pacman cmds like this to check the system with and clean it up?
THANKS
P.S. I didn't notice anything like this in the Wiki, only for cleaning out the cache....

jasonwryan wrote:
DasFox wrote:One I was reading the Wiki and I overlooked the information.
I saw no evidence of that: you might have mentioned it in your post...
Also I'm not your noob or your boy, I'm a middle age man that's been using Linux 10 years, running a Slack box most packages and kernel all custom compiled only running OpenBox...
So next time you want to start telling people to do the basic research before posting, stop and think that maybe they've done it already.
Again, there was no evidence of you having done any research: without evidence there is no reason to assume what the observed behaviour contradicts...
So I've RTFM, just be careful with your choice of words and attitude, being the MOD doesn't give you rights to SPIT on people!
Your perception about being insulted is your own - my post contains nothing insulting or offensive, just a very clear answer to your question.
P.S. And if you were being nice in your odd sort of way I also don't appreciate it, because when we gone out and done the research and overlooked something we have every right to come here and ask and not be told like you've done.
You have every right to ask questions; we have every right to insist that you follow the Forum Etiquette when doing so: https://wiki.archlinux.org/index.php/Fo … ow_to_Post
No you didn't reply which you could of simply done, or asked if I read the Wiki which would of been the proper thing, not telling me to RTFM!
I'm like this at times because I've seen it all to often....
Next time before telling someone, ask them, in case they forget to mention it to you...
Anyhow let's move on....
P.S. So I can remove those packages without a problem?
Last edited by DasFox (2010-11-26 06:16:08)

[Solved] Makepkg hanging on checking runtime dependencies.

Hey guys, as above really.
Recently I've been having problems with makepkg and installing from AUR. It seems to fetch dependencies from the official repositories fine, but when makepkg goes to compile the PKGBUILD, it hangs at '==> checking runtime dependencies'.
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I do not use yaourt. We have been having issues with the AUR server over the last couple days. It is back up now on a new server, but there were issues relating to that move. Does this thread have any bearing on the issue?
Edit: Never mind. I am distracted and get low scores for comprehension today
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[SOLVED] Check for Dependencies

Hey, I'm trying to write a script that'll check for dependencies to install and build something. I can check to see if the file exists but that seems kind of brute force. I'm trying to use
pacman -Q
but I can't get it quite right.
Example:
DEPS="python2-setuptools git curl wget"
if ( sudo pacman -Q $DEPS >/dev/null ) ; then
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sudo pacman -S $DEPS
else
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fi
But this always returns that DEPS aren't installed and prompts to reinstall.
Last edited by 0X1A (2013-10-03 18:55:03)

kaszak696 wrote:
Direct fix of your code would look like this:
#!/bin/bash
DEPS="python2-setuptools git curl wget"
pacman -Q $DEPS &> /dev/null
if [ $? -ne 0 ] ; then
echo "Deps not installed, installing now"
sudo pacman -S $DEPS
else
echo "Dependencies met."
fi
, but as pointed above, it's not the best approach, what exactly are you trying to accomplish?
This works, but still prompts for re-installation. I'm just trying to see if the user has those packages installed and if not then install them.

Where does pacman saves the downloaded stuff?

When I first installed a program, it installed but pacman needed to download things, I then remove it but... When I re-install it again, pacman doesn't need to download the things any more...
Where does pacman store the downloaded stuff?
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Last edited by jc61990 (2013-02-19 15:21:48)

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Does pacman ever check _all_ dependencies?

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