On Thu, Feb 18, 2010 at 11:28:19AM -0500, Mark Burgess wrote:
>
>The example files are all in the tests/units of the source tarball
But the templates (and other example "support" files) that
are refered to I don't think are included. For example file
~/cfengine3/trunk/tests/units/unit_template.cf has these rules:
########################################################
bundle agent testbundle
{
files:
"/home/mark/tmp/file_based_on_template"
create => "true",
edit_line => ExpandMeFrom("/tmp/source_template");
}
########################################################
bundle edit_line ExpandMeFrom(template)
{
vars:
"myvar" string => "[sub string]";
insert_lines:
"$(template)"
insert_type => "file",
expand_scalars => "true";
}
########################################################
This is great, and I did actually find this file before.
But the example is not fully complete since the file
"/home/mark/tmp/file_based_on_template" is not included. In my case
from before, the it was the template file that contained the error.
I suspect that had I seen a known-good template that included fully
qualified variable names, it would have been much clearer.
>Jesse Becker wrote:
>> On Thu, Feb 18, 2010 at 01:14:16AM -0500, Mark Burgess wrote:
>>>
>>> Jesse,
>>>
>>> you should use the fully qualified name $(tmpl.varA) for the variables
>>> in the file, as
>>> they get processed in a different bundle and are therefore not "local"
>>
>> This works, thanks:
>>
>> [r...@host tmp]# cat /tmp/template
>> The first variable: ${test.varA}
>> And the second: ${test.varB}
>>
>> [r...@host tmp]# cat /tmp/expanded
>> The first variable: This is value Alpha
>> And the second: This is value Bravo
>>
>> The documentation posted online does not make this clear (and would have
>> saved me several hours of time yesterday), and the limited examples I
>> found online for using this method do not include mention of the full
>> qualification for the variables either:
>>
>>
>> http://www.cfengine.org/manuals/cf3-reference.html#expand_005fscalars-in-insert_005flines
>>
>>
>> http://project.iu.hio.no/viewvc/trunk/tests/units/unit_template.cf?view=markup&root=Cfengine-3
>>
>> https://cfengine.org/pipermail/help-cfengine/2009-November/006706.html
>>
>> Generally speaking, having more complete examples, including any
>> "supporting files" like sample template filess, would be a big help to
>> everyone. Perhaps these would be suitable for posting on the cfwiki?
>>
>>> Jesse Becker wrote:
>>>> I'm trying to get a basic templating system working for several files,
>>>> and expand_scalars doesn't seem to work. I've found serveral references
>>>> to other people having success with this, so I assume I've done
>>>> something wrong. I'm running the cfengine 3.0.3 community RPM build.
>>>>
>>>> Here's the basic code:
>>>>
>>>> bundle agent tmpl {
>>>>
>>>> vars:
>>>> hostname::
>>>> "varA" string => "This is value Alpha";
>>>> "varB" string => "This is value Bravo";
>>>>
>>>> files:
>>>> hostname::
>>>> "/tmp/template"
>>>> copy_from =>
>>>> update_copy("${g.repo}/template",${g.policy_server});
>>>>
>>>> "/tmp/expanded"
>>>> create => 'true',
>>>> edit_defaults => empty,
>>>> edit_line => expand_template("/tmp/template");
>>>> }
>>>>
>>>> Both 'empty' and 'expand_template come from cfengine_stdlib.cf file
>>>> posted a few days ago.
>>>>
>>>> The content of the 'template' file is simply two lines:
>>>>
>>>> The first variable: ${varA}
>>>> And the second: ${varB}
>>>>
>>>>
>>>>
>>>> I expect, after the expansion is done to have a file that looks like
>>>> this:
>>>>
>>>> The first variable: This is value Alpha
>>>> And the second: This is value Bravo
>>>>
>>>>
>>>> But alas, the two files are identical after running cf-agent.
>>>>
>>>> Below is the relevant output from --verbose. The template file copies
>>>> over without problems, and the 'expanded' file is created, but no
>>>> interpolation appears to be done.
>>>>
>>>> TIA,
>>>>
>>>>
>>>> cf3 Promise made by: /tmp/template
>>>> cf3 .........................................................
>>>> cf3
>>>> cf3 -> Copy file /tmp/template from
>>>> /usr/local/cfengine3/data/Packages/template check
>>>> ... <snip>
>>>> cf3 -> /tmp/template wasn't at destination (copying)
>>>> ... <snip>
>>>> cf3 -> New file /tmp/template.cfnew transmitted correctly - verified
>>>> ... <snip>
>>>>
>>>> cf3 .........................................................
>>>> cf3 Promise handle:
>>>> cf3 Promise made by: /tmp/expanded
>>>> cf3 .........................................................
>>>> cf3
>>>> cf3 -> Using literal pathtype for /tmp/expanded
>>>> cf3 -> No mode was set, choose plain file default 600
>>>> cf3 -> Created file /tmp/expanded, mode = 600
>>>> cf3 Build file model from a blank slate (emptying)
>>>> cf3 -> Handling file edits in edit_line bundle expand_template
>>>> cf3
>>>> cf3 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>>>> * * *
>>>> cf3 BUNDLE expand_template( {'/tmp/template'} )
>>>> cf3 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>>>> * * *
>>>> cf3
>>>> cf3 ? Augment scope expand_template with templatefile
>>>> cf3 ?? Private class context
>>>> cf3
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3 insert_lines in bundle expand_template
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3
>>>> cf3 .........................................................
>>>> cf3 Promise handle:
>>>> cf3 Promise made by: /tmp/template
>>>> cf3 .........................................................
>>>> cf3
>>>> cf3 -> Inserting the promised line "The first variable: ${varA}"
>>>> into /tmp/expanded after locator
>>>> cf3 -> Inserting the promised line "And the second: ${varB}" into
>>>> /tmp/expanded after locator
>>>> cf3 ?? Private class context
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3 insert_lines in bundle expand_template
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3
>>>> cf3
>>>> cf3 .........................................................
>>>> cf3 Promise handle:
>>>> cf3 Promise made by: /tmp/template
>>>> cf3 .........................................................
>>>> cf3
>>>> cf3 -> This promise has already been verified
>>>> cf3 ?? Private class context
>>>> cf3
>>>> cf3
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3 insert_lines in bundle expand_template
>>>> cf3 = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>>>> cf3
>>>> cf3
>>>> cf3 .........................................................
>>>> cf3 Promise handle:
>>>> cf3 Promise made by: /tmp/template
>>>> cf3 .........................................................
>>>> cf3
>>>> cf3 -> This promise has already been verified
>>>> cf3 -> Saving edit changes to file /tmp/expanded
>>>> cf3 Edited file /tmp/expanded
>>>>
>>>>
>>>>
>>>
>>> --
>>> Mark Burgess
>>>
>>> -------------------------------------------------
>>> Professor of Network and System Administration
>>> Oslo University College, Norway
>>>
>>> Personal Web: http://www.iu.hio.no/~mark
>>> Office Telf : +47 22453272
>>> -------------------------------------------------
>>
>
>--
>Mark Burgess
>
>-------------------------------------------------
>Professor of Network and System Administration
>Oslo University College, Norway
>
>Personal Web: http://www.iu.hio.no/~mark
>Office Telf : +47 22453272
>-------------------------------------------------
--
Jesse Becker
NHGRI Linux support (Digicon Contractor)
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