Simple bash script to add a '-' [Solved]

Mr Green · 2009-02-05 16:16:25

I need to write a small bash script to add a '-' to each line in a file before displaying via conky!

Todo

- Get Milk
- Buy Food
- Pay Bills

Currently I use

TEXT
Todo
${hr}
${head /home/mrgreen/.stuffigottado.txt 30 20}

In .conkyrc but have to add '-' each time I edit .stuffigottado.txt

Thanks in advance....

rson451 · 2009-02-05 16:35:49

#!/bin/bash
cat ~/.stuffigottado.txt | sed -r "s/(.*)/- \1/" > filetobereadbyconky.txt

Mr Green · 2009-02-05 16:38:09

Wow! ...... thanks \o/

brisbin33 · 2009-02-05 18:20:05

#TEXT
TODO
${hr}
${exec awk '{ print "- ", $_ }' stuffigottado.txt}

should work too

(edit cat | awk to just awk)

Last edited by brisbin33 (2009-02-05 18:20:58)

Mr Green · 2009-02-05 20:27:31

Yes that works too, removed extra space as its not required

though some sort of filter may be needed if line is empty ie /n

Its much better now thanks for your help :-)

Cerebral · 2009-02-05 21:04:29

To filter out blank lines, you could just modify the awk command:

${exec  awk '!/^$/ { print "-", $_ }' stuffigottado.txt}

brisbin33 · 2009-02-05 21:50:34

Cerebral wrote:

To filter out blank lines, you could just modify the awk command:
${exec  awk '!/^$/ { print "-", $_ }' stuffigottado.txt}

very nice; awk and grep: two commands that never cease to amaze me.

Mr Green · 2009-02-06 07:04:05

That is awesome! will have to google what $_ means got an idea on some of it ...

Cerebral · 2009-02-06 12:40:27

awk runs commands on each "record" - usually a record is a line of input. From what I gather, $_ is the entire line of input (although most documentation I can find uses $0 for the same thing and doesn't even mention $_)

brisbin33 · 2009-02-06 14:42:25

i found $_ just by trial and error so it was by chance that i didn't land on $0 first. documentation ftw!

Arch Linux

#1 2009-02-05 16:16:25

Simple bash script to add a '-' [Solved]

#2 2009-02-05 16:35:49

Re: Simple bash script to add a '-' [Solved]

#3 2009-02-05 16:38:09

Re: Simple bash script to add a '-' [Solved]

#4 2009-02-05 18:20:05

Re: Simple bash script to add a '-' [Solved]

#5 2009-02-05 20:27:31

Re: Simple bash script to add a '-' [Solved]

#6 2009-02-05 21:04:29

Re: Simple bash script to add a '-' [Solved]

#7 2009-02-05 21:50:34

Re: Simple bash script to add a '-' [Solved]

#8 2009-02-06 07:04:05

Re: Simple bash script to add a '-' [Solved]

#9 2009-02-06 12:40:27

Re: Simple bash script to add a '-' [Solved]

#10 2009-02-06 14:42:25

Re: Simple bash script to add a '-' [Solved]

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