How can I remove all newlines with exceptions?

This is a part of my text. I would like to remove all newlines. But
newlines should be kept if the next line starts with '/*@' or if the
current line starts with '/*@'.

-----------
e.stopPropagation();
e.preventDefault();

/*@cc_on


/*@if (@_win32)

e.cancelBubble=true;
e.returnValue=false;

/*@end
-----------

what I want:

-----------
e.stopPropagation();e.preventDefault();
/*@cc_on
/*@if (@_win32)
e.cancelBubble=true;e.returnValue=false;
/*@end
-----------

I'm guessing this would need two steps. 1) remove all newlines 2)
insert newlines
Could someone me figure out what sed command I should use for 2)?

#!/bin/sh
cat a.js b.js c.js > /tmp/combined.js
cat /tmp/combined.js | sed -e 'N;s/\n//;P;D;' | sed -e "????" > out.js

The first command I found at wikipedia http://en.wikipedia.org/wiki/Sed
- I don't think it's working though.

Any suggestions?

Leif

On 24 Mai, 08:55, Leif <leifwess...@hotmail.com> wrote:
> How can I remove all newlines with exceptions?
>
> This is a part of my text. I would like to remove all newlines. But
> newlines should be kept if the next line starts with '/*@' or if the
> current line starts with '/*@'.
>
> -----------
> e.stopPropagation();
> e.preventDefault();
>
> /*@cc_on
>
> /*@if (@_win32)
>
> e.cancelBubble=true;
> e.returnValue=false;
>
> /*@end
> -----------
>
> what I want:
>
> -----------
> e.stopPropagation();e.preventDefault();
> /*@cc_on
> /*@if (@_win32)
> e.cancelBubble=true;e.returnValue=false;
> /*@end
> -----------
>
> I'm guessing this would need two steps. 1) remove all newlines 2)
> insert newlines
> Could someone me figure out what sed command I should use for 2)?
>
> #!/bin/sh
> cat a.js b.js c.js > /tmp/combined.js
> cat /tmp/combined.js | sed -e 'N;s/\n//;P;D;' | sed -e "????" > out.js
>
> The first command I found at wikipediahttp://en.wikipedia.org/wiki/Sed
> - I don't think it's working though.
>
> Any suggestions?

One possibility...

awk '
!NF {next}
/^\/\*@/ {if(t)print ""; t=0; print; next}
{t=1; printf("%s",$0)}
'

Janis

>
> Leif

On 23 May 2007 23:55:22 -0700, Leif
<leifwessman@hotmail.com> wrote:
>
>
>
> How can I remove all newlines with exceptions?
>
> This is a part of my text. I would like to remove all newlines. But
> newlines should be kept if the next line starts with '/*@' or if the
> current line starts with '/*@'.
>
> -----------
> e.stopPropagation();
> e.preventDefault();
>
> /*@cc_on
>
>
> /*@if (@_win32)
>
> e.cancelBubble=true;
> e.returnValue=false;
>
> /*@end
> -----------
>
> what I want:
>
> -----------
> e.stopPropagation();e.preventDefault();
> /*@cc_on
> /*@if (@_win32)
> e.cancelBubble=true;e.returnValue=false;
> /*@end
> -----------
>
> I'm guessing this would need two steps. 1) remove all newlines 2)
> insert newlines
> Could someone me figure out what sed command I should use for 2)?
>
> #!/bin/sh
> cat a.js b.js c.js > /tmp/combined.js
> cat /tmp/combined.js | sed -e 'N;s/\n//;P;D;' | sed -e "????" > out.js
>

cat a.js b.js c.js | tr -d '\n' | sed -e 's|/\*@|
/*@' >out.js


--
The discerning person is always at a disadvantage.

On May 24, 2:55 am, Leif <leifwess...@hotmail.com> wrote:
> How can I remove all newlines with exceptions?
>
> This is a part of my text. I would like to remove all newlines. But
> newlines should be kept if the next line starts with '/*@' or if the
> current line starts with '/*@'.
>
> -----------
> e.stopPropagation();
> e.preventDefault();
>
> /*@cc_on
>
> /*@if (@_win32)
>
> e.cancelBubble=true;
> e.returnValue=false;
>
> /*@end
> -----------
>
> what I want:
>
> -----------
> e.stopPropagation();e.preventDefault();
> /*@cc_on
> /*@if (@_win32)
> e.cancelBubble=true;e.returnValue=false;
> /*@end
> -----------
>
> I'm guessing this would need two steps. 1) remove all newlines 2)
> insert newlines
> Could someone me figure out what sed command I should use for 2)?
>
> #!/bin/sh
> cat a.js b.js c.js > /tmp/combined.js
> cat /tmp/combined.js | sed -e 'N;s/\n//;P;D;' | sed -e "????" > out.js
>
> The first command I found at wikipediahttp://en.wikipedia.org/wiki/Sed
> - I don't think it's working though.
>
> Any suggestions?
>
> Leif

sed 'N;N;s/\n//g' /tmp/combined.js


[root@linuxbox ~]# cat test
e.stopPropagation();
e.preventDefault();

/*@cc_on


/*@if (@_win32)

e.cancelBubble=true;
e.returnValue=false;

/*@end

[root@linuxbox ~]# sed 'N;N;s/\n//g' test
e.stopPropagation();e.preventDefault();
/*@cc_on
/*@if (@_win32)e.cancelBubble=true;
e.returnValue=false;/*@end
[root@linuxbox ~]#

sil wrote:
> On May 24, 2:55 am, Leif <leifwess...@hotmail.com> wrote:
>
>>How can I remove all newlines with exceptions?
>>
>>This is a part of my text. I would like to remove all newlines. But
>>newlines should be kept if the next line starts with '/*@' or if the
>>current line starts with '/*@'.
>>
>>-----------
>>e.stopPropagation();
>>e.preventDefault();
>>
>>/*@cc_on
>>
>>/*@if (@_win32)
>>
>>e.cancelBubble=true;
>>e.returnValue=false;
>>
>>/*@end
>>-----------
>>
>>what I want:
>>
>>-----------
>>e.stopPropagation();e.preventDefault();
>>/*@cc_on
>>/*@if (@_win32)
>>e.cancelBubble=true;e.returnValue=false;
>>/*@end
<snip>
> [root@linuxbox ~]# sed 'N;N;s/\n//g' test
> e.stopPropagation();e.preventDefault();
> /*@cc_on
> /*@if (@_win32)e.cancelBubble=true;
> e.returnValue=false;/*@end

Ahem ^^^^

Leif wrote:
> How can I remove all newlines with exceptions?
>
> This is a part of my text. I would like to remove all newlines. But
> newlines should be kept if the next line starts with '/*@' or if the
> current line starts with '/*@'.
>
> -----------
> e.stopPropagation();
> e.preventDefault();
>
> /*@cc_on
>
>
> /*@if (@_win32)
>
> e.cancelBubble=true;
> e.returnValue=false;
>
> /*@end
> -----------
>
> what I want:
>
> -----------
> e.stopPropagation();e.preventDefault();
> /*@cc_on
> /*@if (@_win32)
> e.cancelBubble=true;e.returnValue=false;
> /*@end
> -----------
>
> I'm guessing this would need two steps. 1) remove all newlines 2)
> insert newlines
> Could someone me figure out what sed command I should use for 2)?
>
> #!/bin/sh
> cat a.js b.js c.js > /tmp/combined.js
> cat /tmp/combined.js | sed -e 'N;s/\n//;P;D;' | sed -e "????" > out.js
>
> The first command I found at wikipedia http://en.wikipedia.org/wiki/Sed
> - I don't think it's working though.
>
> Any suggestions?
>
> Leif
>

sed 'N;=' shows it bundles the input in pairs - no good.

If you don't mind one empty line between two /*@ statements:

perl -pe 'if (/^\/\*\@/) {print "\n"} else {chop}'

--
Michael Tosch @ hp : com