DaysToGo - Minimalistic SuperKaramba Theme

I easily loose track of time when i have a lot of things to do on my list. I needed something to remind me how much time i have left when deciding what do to next or whether to promise to do something more. So i made this simple SuperKaramba theme.

You can download it from here.

The theme is pretty minimalistic and only contains three text items, one using a simple perl script, and an image for the background. So you can easily change it as you wish.

To install SuperKaramba and the theme on a recent openSUSE using terminal do this:

$ sudo zypper in kde4-superkaramba 'perl(Date::Parse)'
$ wget http://www.suse.de/~jkupec/superkaramba/daystogo.tar.gz
$ cp daystogo.tar.gz .kde4/share/apps/superkaramba/themes

(Did you know you could install perl modules like this? :O)

Now if you open Superkaramba, its theme selector should appear and should already contain the new theme. Opening the theme should also unpack the tarball. See the Readme file in the daystogo theme directory for further instruction on how to edit the theme (set your own text and date).

The theme file is as simple as this:

KARAMBA  W=280 H=280

<group> x=5 y=5 w=270 h=270
image x=-10 y=-10 path="img/SUSE_Head_lt.png"
text x=10 y=0 value="<edit daystogo.theme>" color=255,255,255 fontsize=24 shadow=2 bgcolor=100,100,100 font="Sans"
text x=135 y=70 w=270 align=center sensor=program program="~/.kde4/share/apps/superkaramba/themes/daystogo/scripts/daystogo.pl '31/dec/2009 23:59'" line=1 color=255,255,255 shadow=4 bgcolor=0,50,0 fontsize=120 font="Sans" interval=900000
text x=270 y=250 w=270 align=right value="days to go" color=255,255,255 shadow=2 bgcolor=50,50,50 fontsize=24 font="Sans"
</group>

The red parts are what you want to change to suit you. See this manual for description of used items and attributes. You'll find many more there, together with examples you can use to extend this theme or create your own. Looking at other existing themes is useful, too.

Last, but not least, i want to thank Troy Watson for the pretty Geeko icon i used as the background image.

Improved Installation Summary in Zypper

And the best thing last (for now) :O) This was one of the most wanted features for a year now (bnc #389128). Here's how it currently (zypper 1.2.0) looks.

If the architecture or the vendor of an installed package is about to be changed, the old and the new arch/vendor is shown next to the package name:

The following packages are going to change vendor:
  kde4-akonadi                openSUSE -> openSUSE Build Service
  kde4-knemo                  http://packman.links2linux.de -> openSUSE Build Service
  oxygen-icon-theme           openSUSE -> openSUSE Build Service
  oxygen-icon-theme-scalable  openSUSE -> openSUSE Build Service

Other information, like version or repository is not shown by default, like it was before (i argue that it would be too much info for the default output):

The following NEW packages are going to be installed:
  dmidecode libpkcs11-helper1 libstorage libx86emu1

The following packages are going to be upgraded:
  ConsoleKit ConsoleKit-32bit ConsoleKit-x11
...
Continue? [y/n/?] (y):

But you can toggle display of such info in the 'Continue?' dialog. Enter '?' to show all the available options:

Continue? [y/n/?] (y): ?

y - Yes, accept the summary and proceed with installation/removal of packages.
n - No, cancel the operation.
v - Toggle display of package versions.
a - Toggle display of package architectures.
r - Toggle display of repositories from which the packages will be installed.
m - Toggle display of package vendor names.
d - Toggle between showing all details and as few details as possible.
g - View the summary in pager.

[y/n/?] (y):

Enter 'v' to see the versions:

[y/n/?] (y): v
The following NEW packages are going to be installed:
  dmidecode          2.10-3.4
  libpkcs11-helper1  1.07-1.7
  libstorage         2.18.16-1.1
  libx86emu1         1.1-3.1

The following packages are going to be upgraded:
  ConsoleKit        0.3.0-1.5 -> 0.3.0-1.6
  ConsoleKit-32bit  0.3.0-1.5 -> 0.3.0-1.6
  ConsoleKit-x11    0.3.0-1.5 -> 0.3.0-1.6

If the list is too long, enter 'g' to view the result in pager.

Also, the package counts are shown at the end:

1230 packages to upgrade, 2 to downgrade, 5 new, 2 to remove, 4  to change vendor.
Overall download size: 1.02 GiB. After the operation, 175.0 KiB will be freed.

If you have colors enabled the numbers will be highlighted and the ones to-be-removed and to-change-vendor are shown in red to catch your attention.

Enjoy, and let us know what you think!

todo: Add an option to show the dependency graph of the listed packages. That will answer the questions why zypper wants to install or remove a particular package.
todo: Add an option to view detailed package info.
todo: Add an option to view the changelog (esp. of the to-be-upgraded packages).

Zypper Dialogs

I was puzzled by how to make good user dialogs (or prompts) in Zypper for quite some time. My idea was that they should:

• be translatable, including the answers (or options)
• have default option, that would be chosen with a simple Enter key stroke (or automatically in non-interactive mode)
• have the default option visibly marked
• have help
• be simple (have expert options hidden from default view)

This has gradually evolved into the following:

Download (curl) error for 'http://foo.bar/beer/content':
Error code: Connection failed
Error message: Couldn't resolve host 'foo.bar'

Abort, retry, ignore? [a/r/i/?] (a): ?

a - Skip retrieval of the file and abort current operation.
r - Try to retrieve the file again.
i - Skip retrieval of the file and try to continue with the operation without the file.
u - Change current base URI and try retrieving the file again.

[a/r/i/?] (a):

And a translated version:

Ukončiť, znova, ignorovať? [k/z/i/?] (k): ?

k - Preskoč súčasný súbor a ukonči operáciu.
z - Skús stiahnuť súbor znova.
i - Preskoč súčasný súbor a pokračuj v operácii bez neho.
u - Zmeň základnú URI adresu a skús súbor stiahnuť znova.

[k/z/i/?] (k):

• the prompt options are made of a string like "a/r/i/u", which is marked for translation. Translators are advised in the source comment about the meaning of the options and that they
  should use lowercase letters to translate them (but even a longer string would work).


• The default option is chosen by the programmer, using its position (0 in the above example). On Enter, this option would be used as an answer.


• The default option is visibly shown in separate parentheses. First i thought highlighting it with some color would be nice, but then my colleagues convinced me that showing different output in color/non-color mode was not a good idea.


• Whenever there's help or more options available, a question mark (?) is shown as one of the possible options. When entered, the help would be shown, as you can see in the examples above.


• Programmer can choose how many options should be shown, the rest will be hidden. Only the most important options should be shown, the rest will be listed after entering the '?'.

It's surely not perfect, but hopefully quite usable. Debian's apt does something similar, but i'm not sure about the translations and other details.

todo: Allow to pass arguments together with the option as part of the answer. This would allow to e.g. remove particular package from the list of to-be-installed packages when seeing the summary. Or show detailed info (e.g. changelog) of a package that caught your attention in the summary before starting the installation.

(oh, did i mention that we'd be glad to receive patches implementing any of the todo's i mention in my blog posts? :O) If you like zypper and would enjoy some coding in C++, don't hesitate to contact us).

Configure Your Zypper

So i mentioned zypper.conf in my previous post? Yes, Zypper now (since 1.2.0) reads configuration file from /etc/zypp/zypper.conf and from your $HOME/.zypper.conf. It does not have too much to offer right now, appart from the colors, but the point is now we can easily add new ones there, whenever there's a need.

If there is Zypper option that you write too often, it should have it's configuration file counterpart as well, so that it saves you typing. I actually have a list of few, collected over time from users, so i'll be adding them soon. You'll always find the latest list of supported config options here, so stay tuned (and let us know if you need something that's not there yet).

So which value will be used after all, the one from the config file, or the one passed via command line? Here is the override priority order, highest to lowest.

1. command line options
2. options from $HOME/.zypper.conf
3. options from /etc/zypp/zypper.conf
4. and the lowest priority have the ones from zypp.conf, so that you can override libzypp's settings in zypper, if zypper allows it.

You can use an alternative config file via --config custom/zypper.conf global option. If you do, the other config files (item 2 and 3 above) will be ignored.

todo: Add command for manipulating the configuration files as an alternative to manual editing. The command would list available options with current values and descriptions and would allow to set new values, or restore the defaults.

Colors in Zypper

Zypper 1.2.0 is coming to Factory soon, bringing a few new features i will briefly describe in a few posts.

My last post was about colors in terminal applications, so i'll start with colors in zypper. There is new [color] section in zypper.conf (oh, i should have started with zypper.conf.. nevermind :O), where you can enable or disable colorization of the output, tell zypper whether you use dark or light terminal background, and, finally, select your own color for each kind of output, if you don't like the defaults.

By default, zypper will print progress messages from ongoing operation in white, finished stuff in grey, result in white, errors in red (surprise :O), and apart from this general stuff there are some special things highlighted, like the package counts in the installation summary. More is yet to come (but i don't want to overcolorify it, of course).



Here are the config options. Those who do not want to wait for the new package to reach Factory can get it from zypp::Head OBS repo.

So, play around, enjoy, and let me know what you think.