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Old 12-14-2006, 12:54 PM   #1
armandino101
LQ Newbie
 
Registered: Oct 2006
Distribution: Ubuntu
Posts: 14

Rep: Reputation: 0
Parsing text file line by line


Hi,

I have a file with cvs output:


Code:
Checking in src/com/blah/Foo.java;
/home/cvs/cvsroot/project/src/com/blah/Foo.java,v  <--  Foo.java
new revision: 1.2; previous revision: 1.1
done

Checking in src/com/blah/Bar.java;
/home/cvs/cvsroot/project/src/com/blah/Bar.java,v  <--  Bar.java
new revision: 1.7; previous revision: 1.6
done
I want to parse this file line by line:

Code:
LINES="$( cat cvsout.txt )"
for i in $(<LINES); do
  echo $i
done
but this converts each white space into a new line, so I get

Code:
Checking
in
src/com/blah/Foo.java;
...
What am I doing wrong here? Any suggestions?

Thanks in advance.

PS: if it helps, my end goal is to format the text into a tidier output that looks like this:

Code:
project/src/com/blah/Foo.java:1.2
project/src/com/blah/Bar.java:1.7
 
Old 12-14-2006, 01:23 PM   #2
matthewg42
Senior Member
 
Registered: Oct 2003
Location: UK
Distribution: Kubuntu 12.10 (using awesome wm though)
Posts: 3,530

Rep: Reputation: 63
You want something like this:

Code:
cat cvsout.txt | while read line; do
    echo "got line: $line"
done
...although I think perl or awk is a better bet for this sort of task. For sure you can do it with a shell script, but it's really not ideal for this sort of thing, whereas perl is. For example:
Code:
#!/usr/bin/perl -w

use strict;

my $file = "";
my $ver = 0.0;


while (<>) {
        if ( m|cvsroot/(.*),v\s| ) {
                $file = $1;
        }
        elsif ( m|^new revision: ([^;]+);| ) {
                $ver = $1;
        }
        elsif ( /^\s*done\s*$/ ) {
                print "$file:$ver\n";
        }
}
 
Old 12-14-2006, 02:23 PM   #3
armandino101
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Registered: Oct 2006
Distribution: Ubuntu
Posts: 14

Original Poster
Rep: Reputation: 0
That does exactly what i need.

Cheers Matt!
 
Old 12-14-2006, 02:43 PM   #4
matthewg42
Senior Member
 
Registered: Oct 2003
Location: UK
Distribution: Kubuntu 12.10 (using awesome wm though)
Posts: 3,530

Rep: Reputation: 63
No problem.
 
  


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