Shell Programming and Scripting

I'm trying to process some files using sed but I'm running into a problem. Let me first show an example- this isn't the actual data I use but it will simplify the problem..

For my example, this is the contents of input.txt.

Code:

Name: Bob Smith
Address: 123 Main Street
City: Anytown, USA 010101

Item: Coffee Mug
Item: Baseball Hat
Item: Keychain

Here is the sed command I run to parse the information I need to capture.

Code:

cat input.txt | sed -e 's:Name\: \(.*\).*:\1:p' -e 's:Address\: \(.*\).*:\1:p' -e 's:City\: \(.*\), \(.*\) \(.*\).*:\1, \2 \3:p' -n -e 's:Item\: \(.*\).*:\1:p'

And finally, here is the output...

Code:

Bob Smith
123 Main Street
Anytown, USA 010101
Coffee Mug
Baseball Hat
Keychain

The sed command prints all of the 'Items'. What I want is a way to print only the first occurrence of the Item field.

So the output would look like this...

Code:

Bob Smith
123 Main Street
Anytown, USA 010101
Coffee Mug

I've simplified the data and the output for my question. I would really like to do it all in a shell script with no sed command files. I don't want to use tail or head either.

Any ideas? I've looked and looked but can't really find the answer. Thanks in advance for any help you may provide!

nawk -f stivo.awk input.txt

stivo.awk:

Code:

BEGIN {
  FS=RS=""
}
FNR % 2 { for(i=1; i <=NF; i++) print substr($i, index($i, ":")+2); next }
/^Item:/ { print substr($1, index($1, ":")+2);next }

or the inline version:

Code:

nawk -v FS='' -v RS='' '
     FNR % 2 { for(i=1; i <=NF; i++) print substr($i, index($i, ":")+2); next }
     /^Item:/ { print substr($1, index($1, ":")+2);next }' input.txt