Get unique list of all template variables from template (html) file using regex or bash command

Question

I have html templates and I want to get list of all template variables like :

<li>User ID <!--{ID}--></li>

 is a template variables

Edit:

Regex pattern for doing this is :

\<\!--\{(.*?)\}--\>

I need to catch only unique occurrences for any variable e.g  might be present multiple time in template

@Jaypal I have not tried anything using bash.Regex (using php) is working fine but now I need to find Unique instances. — sakhunzai, Jun 07 '13 at 04:50

perreal · Accepted Answer · 2013-06-07T05:18:26.577

1

With Perl:

perl -lne '{ while (/<!--{(.*?)}-->/g) {$t{$1}++}  } 
        END{ print for keys %t }' input.html

With less Perl statements:

perl -lpe '{s/.*?(<!--{[^}]*}-->)/\1\n/g}' input | \
        grep '<!--{' | sort | uniq

edited Jun 07 '13 at 05:18

answered Jun 07 '13 at 04:56

perreal

Would you like to suggest regex alternative ?. Thanks for the bash command that is perfect. – sakhunzai Jun 07 '13 at 05:04
are there multiple template parameters on a line? – perreal Jun 07 '13 at 05:07
Then it is not possible with sed and with simple regexes, I would go with the perl one-liner. – perreal Jun 07 '13 at 05:17
your first command is perfectly returning unique list of variables , but I also need a regex version to use within php e.g using preg_match_all().However, I ll accept the answer w.r.t your first command. Thanks – sakhunzai Jun 07 '13 at 05:25

score 0 · Answer 2 · answered Jun 07 '13 at 04:57

0

ack -o '\<\!--\{(.*?)\}--\>' input.html | uniq -c

answered Jun 07 '13 at 04:57

jaypal singh

@sakhunzai I would have suggested `grep -oP` but `grep` on mac doesn't support `perl` based regexes. – jaypal singh Jun 07 '13 at 05:20