Changes between Initial Version and Version 1 of Development/Code/TemplateToolkit

Timestamp:

Apr 17, 2012, 8:53:42 PM (13 years ago)

Author:

munoz

Comment:

--

Development/Code/TemplateToolkit

@@ +1 @@
+= Using Template::Toolkit in Quattor components =
+
+In some cases, most of the code deals with printing correctly to a file, and it could be simplified a lot by using a basic template instead of zillions of print statements.
+
+For instance, the accounts component could do.
+
+{{{
+#!perl
+
+# WARNING: UNTESTED!!!
+
+use Template;
+use CAF::FileWriter;
+
+my $fh = CAF::FileWriter->new("/etc/passwd", log => $self);
+my $tree = $config->getElementGetTree();
+# This one is needed for Template::Toolkit to work with the CAF::File*
+my $tpl = Template->new();
+$tpl->process(\*DATA, $tree, $fh);
+
+__DATA__
+
+[% FOREACH user in users.pairs %]
+[% user.key %]:x:[% user,value.uid %]:[% user.value.gid %]:[% user.value.comment %]:[% user.value.homeDir %]:[% user.value.shell %]
+[% END %]
+}}}
+
+The advantage in some sitiations is that the representation is completely isolated from the logic that will generate it. And it may allow for a closer correspondency with the schema, if wanted.
+
+Sometimes one template won't be enough: there will be several files of several types to print (f.i, nagios-related configuration). We still have to see how to ship different templates.
+
+Also, we have to be careful so that we don't replace ugly code with even uglier templates!!