An Independent Game Developer’s Diary

So at my dayjob, we often have to do some funky things.  Like today, we are doing a refactor, and we wanted to know whether any of our web templates don’t use a component, because we needed to add something to it that would be global, and anything that didn’t use it would need to have our lines manually added.

With over 200 templates to look through this was looking like a pain to do, howver, in about 5 minutes, me and my pair managed to develop three solutions using just bash scripting.

My first was:

find . -iname \*.vm -exec bash -c "grep -Hiq javascript.vm {} || echo Not Found in {}" \;

While doing this, I was looking for the -q option on grep, to keep grep quiet when finding the files, and I found the -L option which does almost exactly this:

find . -iname \*.vm -exec grep -L javascript.vm {} \;

The -L says print the filename that didn’t match the expression on any of it’s lines.  (For the record, -l does the inverse, so finding all templates which contain a line is also easy).  Meanwhile Patric found a nice solution too,

find . -iname \*.vm -! -exec grep -q javascript.vm {} \; -print

This also relies on the return value of grep, but instead of some funky bash logic, uses find’s built in operators to execute the -print if the -exec returns 1

Did I say how much I like linux?

So I’ve had a problem under ubuntu that maintaining my creative Zen’s music has been hard.  I decided to copy my entire music collection onto my laptop, use Amarok to organise it and re-tag everything correctly, and then re-upload my music.

However, to do that I had to delete all of the music tracks on my nomad.  Now Amarok and Gnomad seem fine for uploading music, and even downloading music, but deleting files seemed to continuously throw segmentation faults, and cause errors.  I’m guessing this is a problem with the underlying libnjb library.

However the libnjb package has a libnjb-examples package, which includes an njb-deltr program, which deletes a single track.  Combined with the njb-tracks client to get a list of all of the track id’s on the system, the following bit of Bash magic worked a treat:

./njb-tracks | grep "ID:" | cut -d' ' -f2 | while read track; do
  echo "Deleting track $track"; ./njb-deltr $track;
done