[Bash] Automated symlinking question

robrene · 2009-10-07 12:59:39

Hey all, I've been struggling getting a tedious task of recreating symlinks automated... Let me justgive you an example of what I'd be doing by hand:

[~/.icons/my-theme/scalable/apps/ $] ls -l
total 8464
-rw-r--r-- 1 rob rob   3781 2008-06-05 12:08 abiword.svg
lrwxrwxrwx 1 rob rob     37 2009-05-31 16:59 access.svg -> preferences-desktop-accessibility.svg
-rwxrwxrwx 1 rob rob  43384 2009-03-29 13:00 accessories-calculator.svg
-rwxrwxrwx 1 rob rob  11145 2009-03-29 13:00 accessories-character-map.svg
-rw-r--r-- 1 rob rob  15667 2009-03-29 13:00 accessories-dictionary.svg
-rwxrwxrwx 1 rob rob  37368 2009-03-29 13:00 accessories-text-editor.svg
lrwxrwxrwx 1 rob rob     16 2009-05-30 18:29 acroread.svg -> adobe-reader.svg
lrwxrwxrwx 1 rob rob     38 2009-06-07 00:31 addressbook.svg -> ../mimetypes/x-office-address-book.svg
-rwxrwxrwx 1 rob rob   8885 2009-03-17 19:04 adobe-reader.svg
-rwxrwxrwx 1 rob rob  63899 2009-03-17 19:04 agave.svg
-rwxrwxrwx 1 rob rob  27652 2009-03-17 19:04 alacarte.svg
-rw-r--r-- 1 rob rob   9626 2008-06-05 12:08 amarok.svg
lrwxrwxrwx 1 rob rob     10 2009-05-30 18:55 amsn.svg -> im-msn.svg
-rw-r--r-- 1 rob rob  22315 2008-06-28 23:14 amule.svg
-rwxr-xr-x 1 rob rob 524008 2009-02-18 13:23 applets-screenshooter.svg
-rw-r--r-- 1 rob rob  15346 2008-08-06 21:00 application-default-icon.svg
-rwxrwxrwx 1 rob rob  12422 2009-03-17 19:04 appointment.svg
-rwxrwxrwx 1 rob rob   9381 2009-03-17 19:04 apport.svg
-rw-r--r-- 1 rob rob  43011 2008-07-31 23:30 aptoncd.svg
-rw-r--r-- 1 rob rob  21049 2008-06-05 11:42 ardour.svg
lrwxrwxrwx 1 rob rob      8 2009-05-31 21:31 audacious.svg -> xmms.svg
lrwxrwxrwx 1 rob rob     13 2009-09-25 12:25 audacious2.svg -> audacious.svg
-rw-r--r-- 1 rob rob  32781 2008-06-05 12:08 audacity.svg
-rwx------ 1 rob rob   8232 2009-03-21 09:24 audio-player.svg
-rw-r--r-- 1 rob rob  22008 2008-06-05 12:08 avant-window-navigator.svg
lrwxrwxrwx 1 rob rob      9 2009-05-30 20:08 avidemux.svg -> video.svg
-rw-r--r-- 1 rob rob  30860 2008-10-25 17:31 azureus.svg
... etc

Now I would cd ../../32x32/apps/ and then
ln -s preferences-desktop-accessibility.png access.png
ln -s adobe-reader.png acroread.png
ln -s ../mimetypes/x-office-address-book.png addressbook.png
ln -s im-msn.png amsn.png
ln -s xmms.png audacious.png
ln -s audacious.png audacious2.png
ln -s video.png avidemux.png
... etc

Notice how the extention has changed from .svg to .png

Now I would like this to be automated through some sort of bash script (any scripting language will do really).

I've tried getting this done, I just really have no clue when using bash. I realise we should probably write a script in the 32x32/apps/ folder that calls `ls -l ../../scalable/apps` and then works some magic, this I've failed at though.
Could someone please help me? This is such a tedious task to do by hand...

grey · 2009-10-08 10:32:21

I'd use perl and work from the text you get from ls -l. Bit low tech, but it should work.

1. ls -l ~/.icons/my-theme/scalable/apps/ > dirlisting
2. write perl script that extracts the (source, target) pairs of the links. The main loop should be something like

while <dirlisting> {
  next unless /^l/;
  if (/ (\S+)\.svg -> (\S+)\.svg/) {
    print "linking $1 to $2\n";
    system ("ln -s $1.png $2.png");
  }
}

3. run that script in all the directories where you want to create the symlinks.

Arch Linux

#1 2009-10-07 12:59:39

[Bash] Automated symlinking question

#2 2009-10-08 10:32:21

Re: [Bash] Automated symlinking question

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