Oneliner problem with < and > in variable

[Ansim]

Hello,

I have this oneliner
$_PERL -ni -we 'BEGIN{@content='$_new_start'} if(/'$_start'/){s//
@content/;print}else{print}' SMOinfo.xml

where $_start is <Action name="abc" id="_XX_"> , a xml pragma, and
$_new_start is <!-- <Action.....>, same xml pragma but with comment
marks first.

When this oneliner is executet i receives this error:
"Unterminated <> operator at -e line 1.

I've tried several settings in the @content='$_new_start' statement,
everyone failing with different error codes.
Tried to change the ' to ` or " or "' or ´ and without.


The idea is to, in a script, auto magically comment out Action
settings in the xml file, if they are commented in another file.

The one liner is executet once more and end the comment with

$_PERL -ni -we 'BEGIN{@content='$_new_end'} if(/'$_end'/){s//
@content/;print}else{print}' SMOinfo.xml
where $_end="</Action name="abc" id="_XX_">", $_new_end="</Action
id="_XX_"> -->"

Any suggestions on how to solve this?

BR
//Anders

 

[Peter Makholm]

I have this oneliner
$_PERL -ni -we 'BEGIN{@content='$_new_start'} if(/'$_start'/){s//
@content/;print}else{print}' SMOinfo.xml

where $_start is <Action name="abc" id="_XX_"> , a xml pragma, and
$_new_start is <!-- <Action.....>, same xml pragma but with comment
marks first.

Could you try to cut'n'paste exactly what you're writing in you
oneliner. In the above $_new_start isn't anything but undef.

//Makholm

 

[Michele Dondi]

I have this oneliner
$_PERL -ni -we 'BEGIN{@content=3D'$_new_start'} if(/'$_start'/){s//
@content/;print}else{print}' SMOinfo.xml

Quote the inner single quotes. BTW: a shell problem, not a Perl one...


Michele

 

[Ansim]

If i set @content='"$_new_start"' and if(/<Activity.*_MM_FRP_FILE"\>/)

_new_start="<!-- <Activity Name="Firmware Upgrade"
Build_id="_MM_FRP_FILE">" by some grep, nawk.

(Of course not the first and last ".)

i get following output:

Unterminated <> operator at -e line 1.

and nothing is done in the SMOinfo.xml

But, if i set @content='"$_start"' where _start="<Activity
Name="Firmware Upgrade" Build_id="_MM_FRP_FILE">"
then the line in SMOinfo.xml is changed to
Activity Name="Firmware Upgrade" Build_id="_MM_FRP_FILE" , note! the
< > is removed. Not what i wanted.

The oneliner is executed inside a ksh script.

//Anders

 

[Michele Dondi]

If i set @content='"$_new_start"' and if(/<Activity.*_MM_FRP_FILE"\>/)

_new_start="<!-- <Activity Name="Firmware Upgrade"
Build_id="_MM_FRP_FILE">" by some grep, nawk.

(Of course not the first and last ".)

i get following output:

Unterminated <> operator at -e line 1.

and nothing is done in the SMOinfo.xml

But, if i set @content='"$_start"' where _start="<Activity
Name="Firmware Upgrade" Build_id="_MM_FRP_FILE">"
then the line in SMOinfo.xml is changed to
Activity Name="Firmware Upgrade" Build_id="_MM_FRP_FILE" , note! the
< > is removed. Not what i wanted.

The oneliner is executed inside a ksh script.

I think all shells behave more or less the same wrt basic quoting. Can
you post the complete oneliners in their variations and explain how
they fail to work please?

From the first post I gathered that you had a quoting problem of
single quotes inside single quotes. You overcome it like so:

'something \'strange\' indeed'

Here you brought up double quotes. I could not follow your words in
detail admittedly *also* because I'm in a hurry. But remember that
double quotes *interpolate* in Perl, and this may matter.


Michele

 

[John W. Krahn]

I have this oneliner
$_PERL -ni -we 'BEGIN{@content='$_new_start'} if(/'$_start'/){s//
@content/;print}else{print}' SMOinfo.xml

where $_start is <Action name="abc" id="_XX_"> , a xml pragma, and
$_new_start is <!-- <Action.....>, same xml pragma but with comment
marks first.

When this oneliner is executet i receives this error:
"Unterminated <> operator at -e line 1.

I've tried several settings in the @content='$_new_start' statement,
everyone failing with different error codes.
Tried to change the ' to ` or " or "' or ´ and without.


The idea is to, in a script, auto magically comment out Action
settings in the xml file, if they are commented in another file.

The one liner is executet once more and end the comment with

$_PERL -ni -we 'BEGIN{@content='$_new_end'} if(/'$_end'/){s//
@content/;print}else{print}' SMOinfo.xml
where $_end="</Action name="abc" id="_XX_">", $_new_end="</Action
id="_XX_"> -->"

Any suggestions on how to solve this?

In perl one-liners:

-n ' if ( // ) { s///; print } else { print } '

Is usually written as:

-p ' s/// '

So:

$_PERL -ni -we 'BEGIN{@content='$_new_start'}
if(/'$_start'/){s//@content/;print}else{print}' SMOinfo.xml

*Should* be written as:

$_PERL -pi -we 'BEGIN{$content='$_new_start'} s/'$_start'/$content/' SMOinfo.xml

Or perhaps just:

$_PERL -pi -we 's/'$_start'/'$_new_start'/' SMOinfo.xml


If that doesn't work then you could try something like this:

$_PERL -spi -we 's/$x/$y/o' -- -x="$_start" -y="$_new_start" SMOinfo.xml




John

 

[Ansim]

Thanks all for the help.

Glenn and Michal helped a lot.

The rest helped me with understanding the importance of qouting.
Perl interpreted the < and > in a strange way othervise.

BR
//Anders