Cheetah's #include base directory

[Pablo Antonio]

Hello,
    this is my first day with Cheetah. I have an old app which uses
the web.py framework and Cheetah for templating.

Thing is some files have an '#include "<file>"' at the top. They usually
include some header with the DOCTYPE and a title and that's pretty much
it. Well, the problem is this <file> is being searched in the current
directory the app is located, and not in the ./templates/ dir which is
where the templates are.

How can I fix this? Is this different in newer versions? I'm using 2.0.1
(the newest in Ubuntu's repositories).

Thanks in advance,

--
Pablo Antonio (AKA crazy2k)
http://www.pablo-a.com.ar/

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[R. Tyler Ballance]

On Tue, 29 Dec 2009, Pablo Antonio wrote:

> Hello,
>     this is my first day with Cheetah. I have an old app which uses
> the web.py framework and Cheetah for templating.

Howdy! Sorry I missed you on IRC, we're quite a ways apart as far as time zones
are concerned ;)

> Thing is some files have an '#include "<file>"' at the top. They usually
> include some header with the DOCTYPE and a title and that's pretty much
> it. Well, the problem is this <file> is being searched in the current
> directory the app is located, and not in the ./templates/ dir which is
> where the templates are.

Personally I don't use the #include directive ever (I find it too much like
Smarty (read: hacky)). That said, you *might* be able to override the method on
your base template class `serverSidePath` which is what the #include directive
handler uses to locate the included template. In effect:

    #import os.path
    #def serverSidePath(**kwargs)
        ## serverSidePath takes a `path` keyword arg

        ## Assuming your templates directory is called `templates`
        #return os.path.join(os.getcwd(), 'templates', kwargs['path'))
    #end def

I'm making a couple of assumptions in the code above, namely that `os.getcwd()`
will return the application's base directory. That said, let me know if you
can't get serverSidePath to work for you, I'll be on IRC for the next 8-12
hours while I work so feel free to ping me there :)

> How can I fix this? Is this different in newer versions? I'm using 2.0.1
> (the newest in Ubuntu's repositories).

It's worth noting that v2.4.1 is the latest release
(http://pypi.python.org/pypi/Cheetah/2.4.1)

Cheers,
-R. Tyler Ballance
--------------------------------------
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[Aahz]

On Tue, Dec 29, 2009, R. Tyler Ballance wrote:

> On Tue, 29 Dec 2009, Pablo Antonio wrote:
>>
>> Thing is some files have an '#include "<file>"' at the top. They usually
>> include some header with the DOCTYPE and a title and that's pretty much
>> it. Well, the problem is this <file> is being searched in the current
>> directory the app is located, and not in the ./templates/ dir which is
>> where the templates are.
>
> Personally I don't use the #include directive ever (I find it too much
> like Smarty (read: hacky)).

All right, how do you do create global template elements such as page
footers?  I want to write them in Cheetah rather than Python because
they're primarily HTML.
--
Aahz (aahz@...)           <*>         http://www.pythoncraft.com/

import antigravity

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[R. Tyler Ballance]

On Tue, 26 Jan 2010, Aahz wrote:

> On Tue, Dec 29, 2009, R. Tyler Ballance wrote:
> > On Tue, 29 Dec 2009, Pablo Antonio wrote:
> >>
> >> Thing is some files have an '#include "<file>"' at the top. They usually
> >> include some header with the DOCTYPE and a title and that's pretty much
> >> it. Well, the problem is this <file> is being searched in the current
> >> directory the app is located, and not in the ./templates/ dir which is
> >> where the templates are.
> >
> > Personally I don't use the #include directive ever (I find it too much
> > like Smarty (read: hacky)).
>
> All right, how do you do create global template elements such as page
> footers?  I want to write them in Cheetah rather than Python because
> they're primarily HTML.

I use inheritance between pre-compiled templates (since it's tricky to do with
dynamic compilation), here's an example:

base.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/base.tmpl
index.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/index.tmpl

Cheers,
-R. Tyler Ballance
--------------------------------------
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[Aahz]

On Tue, Jan 26, 2010, R. Tyler Ballance wrote:

> On Tue, 26 Jan 2010, Aahz wrote:
>>
>> All right, how do you do create global template elements such as page
>> footers?  I want to write them in Cheetah rather than Python because
>> they're primarily HTML.
>
> I use inheritance between pre-compiled templates (since it's tricky to do with
> dynamic compilation), here's an example:
>
> base.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/base.tmpl
> index.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/index.tmpl

Ah-ha.  Well, since I *do* want dynamic compilation for development, I
guess I'm going to need to put in some skill sweat to figure out how to
make that work.
--
Aahz (aahz@...)           <*>         http://www.pythoncraft.com/

import antigravity

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[R. Tyler Ballance]

On Thu, 28 Jan 2010, Aahz wrote:

> On Tue, Jan 26, 2010, R. Tyler Ballance wrote:
> > On Tue, 26 Jan 2010, Aahz wrote:
> >>
> >> All right, how do you do create global template elements such as page
> >> footers?  I want to write them in Cheetah rather than Python because
> >> they're primarily HTML.
> >
> > I use inheritance between pre-compiled templates (since it's tricky to do with
> > dynamic compilation), here's an example:
> >
> > base.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/base.tmpl
> > index.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/index.tmpl
>
> Ah-ha.  Well, since I *do* want dynamic compilation for development, I
> guess I'm going to need to put in some skill sweat to figure out how to
> make that work.

Indeed; I think adding the ability to use inheritance with dynamic compilation
would be a good feature to add to Cheetah but I'm uncertain on what the API
would look like?

Should I create fake modules for templates based on their paths? I.e. if your
base.tmpl was located in proj/views does it make sense that inheritors of that
base.tmpl would do:

    #from proj.views import base
    #extends base.base

For the dynamic compilation I think I'm going to have to fudge the modules to
make it work, i'm just worried about it being non-obvious to developers :/

Cheers,
-R. Tyler Ballance
--------------------------------------
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 GitHub: http://github.com/rtyler
Twitter: http://twitter.com/agentdero
   Blog: http://unethicalblogger.com



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[Aahz]

On Thu, Jan 28, 2010, R. Tyler Ballance wrote:

> On Thu, 28 Jan 2010, Aahz wrote:
>> On Tue, Jan 26, 2010, R. Tyler Ballance wrote:
>>> On Tue, 26 Jan 2010, Aahz wrote:
>>>>
>>>> All right, how do you do create global template elements such as page
>>>> footers?  I want to write them in Cheetah rather than Python because
>>>> they're primarily HTML.
>>>
>>> I use inheritance between pre-compiled templates (since it's tricky
>>> to do with dynamic compilation), here's an example:
>>>
>>> base.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/base.tmpl
>>> index.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/index.tmpl
>>
>> Ah-ha.  Well, since I *do* want dynamic compilation for development, I
>> guess I'm going to need to put in some skill sweat to figure out how to
>> make that work.
>
> Indeed; I think adding the ability to use inheritance with dynamic
> compilation would be a good feature to add to Cheetah but I'm
> uncertain on what the API would look like?

We already have code we use to deal with dynamic vs pre-compiled, which
I guess I'll just extend a bit to deal with "including" templates:

def getTemplate(name):
    return os.path.join(os.path.realpath(os.path.join("..","..", "resource","html","templates")), name) + ".tmpl"

def run_template(tmpl_name, searchList, development=None):
    if development is None:
        development = "-d" in sys.argv or "--DEVELOPMENT" in sys.argv
    if development:
        logging.debug("Getting dev template: %s", tmpl_name)
        t = Template(file=getTemplate(tmpl_name), searchList=searchList)
    else:
        logging.debug("Getting compiled template: %s", tmpl_name)
        t = getattr(templates, tmpl_name)(searchList=searchList)
    return t.respond()

Obviously, getTemplate() relies on knowledge of our environment and would
need updating to work in the general case.  Similarly, the "templates"
package is also an artifact of our environment, and our build system
auto-generates the __init__.py of the package to hoist the template
classes into the root package namespace.

Hopefully this gives you ideas for something that can work in Cheetah.

But at least soon I will tell our developers to just use e.g.
$run_template('footer')
which isn't quite as nice as template inheritance but is straightforward
and will still be considerably better than what we currently have.
--
Aahz (aahz@...)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer

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[Tavis Rudd]

Wouldn't template inheritance with dynamic compilation just require
installing the Cheetah import hook?

On Tue, 16 Mar 2010, Aahz wrote:

> On Thu, Jan 28, 2010, R. Tyler Ballance wrote:
>> On Thu, 28 Jan 2010, Aahz wrote:
>>> On Tue, Jan 26, 2010, R. Tyler Ballance wrote:
>>>> On Tue, 26 Jan 2010, Aahz wrote:
>>>>>
>>>>> All right, how do you do create global template elements such as page
>>>>> footers?  I want to write them in Cheetah rather than Python because
>>>>> they're primarily HTML.
>>>>
>>>> I use inheritance between pre-compiled templates (since it's tricky
>>>> to do with dynamic compilation), here's an example:
>>>>
>>>> base.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/base.tmpl
>>>> index.tmpl: http://github.com/rtyler/urlenco.de/blob/master/Urlencode/views/index.tmpl
>>>
>>> Ah-ha.  Well, since I *do* want dynamic compilation for development, I
>>> guess I'm going to need to put in some skill sweat to figure out how to
>>> make that work.
>>
>> Indeed; I think adding the ability to use inheritance with dynamic
>> compilation would be a good feature to add to Cheetah but I'm
>> uncertain on what the API would look like?
>
> We already have code we use to deal with dynamic vs pre-compiled, which
> I guess I'll just extend a bit to deal with "including" templates:
>
> def getTemplate(name):
>    return os.path.join(os.path.realpath(os.path.join("..","..", "resource","html","templates")), name) + ".tmpl"
>
> def run_template(tmpl_name, searchList, development=None):
>    if development is None:
>        development = "-d" in sys.argv or "--DEVELOPMENT" in sys.argv
>    if development:
>        logging.debug("Getting dev template: %s", tmpl_name)
>        t = Template(file=getTemplate(tmpl_name), searchList=searchList)
>    else:
>        logging.debug("Getting compiled template: %s", tmpl_name)
>        t = getattr(templates, tmpl_name)(searchList=searchList)
>    return t.respond()
>
> Obviously, getTemplate() relies on knowledge of our environment and would
> need updating to work in the general case.  Similarly, the "templates"
> package is also an artifact of our environment, and our build system
> auto-generates the __init__.py of the package to hoist the template
> classes into the root package namespace.
>
> Hopefully this gives you ideas for something that can work in Cheetah.
>
> But at least soon I will tell our developers to just use e.g.
> $run_template('footer')
> which isn't quite as nice as template inheritance but is straightforward
> and will still be considerably better than what we currently have.
> --
> Aahz (aahz@...)           <*>         http://www.pythoncraft.com/
>
> "Many customs in this life persist because they ease friction and promote
> productivity as a result of universal agreement, and whether they are
> precisely the optimal choices is much less important." --Henry Spencer
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
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> https://lists.sourceforge.net/lists/listinfo/cheetahtemplate-discuss
>

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[Aahz]

On Tue, Mar 16, 2010, Tavis Rudd wrote:
>
> Wouldn't template inheritance with dynamic compilation just require  
> installing the Cheetah import hook?

Where is that documented?  This is the first I've heard of it, and I
don't see it anywhere at
http://www.cheetahtemplate.org/docs/users_guide_html/
--
Aahz (aahz@...)           <*>         http://www.pythoncraft.com/

"Many customs in this life persist because they ease friction and promote
productivity as a result of universal agreement, and whether they are
precisely the optimal choices is much less important." --Henry Spencer

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[Tavis Rudd]

I don't think it's documented in the main docs.
Add:
   import Cheetah.ImportHooks
   Cheetah.ImportHooks.install()

somewhere early in your python process' startup.  The code is really old,
pre pep-302, but I think it should still work.  If not, it should be easy
enough to use http://pypi.python.org/pypi/importlib/1.0.1 to update it.

Tavis

On Tue, 16 Mar 2010, Aahz wrote:

> On Tue, Mar 16, 2010, Tavis Rudd wrote:
>>
>> Wouldn't template inheritance with dynamic compilation just require
>> installing the Cheetah import hook?
>
> Where is that documented?  This is the first I've heard of it, and I
> don't see it anywhere at
> http://www.cheetahtemplate.org/docs/users_guide_html/
> --
> Aahz (aahz@...)           <*>         http://www.pythoncraft.com/
>
> "Many customs in this life persist because they ease friction and promote
> productivity as a result of universal agreement, and whether they are
> precisely the optimal choices is much less important." --Henry Spencer
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
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>

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[Tavis Rudd]

On Tue, 16 Mar 2010, Tavis Rudd wrote:

> I don't think it's documented in the main docs.
> Add:
>   import Cheetah.ImportHooks
>   Cheetah.ImportHooks.install()
>
> somewhere early in your python process' startup.  The code is really old,
> pre pep-302, but I think it should still work.  If not, it should be easy
> enough to use http://pypi.python.org/pypi/importlib/1.0.1 to update it.
If the existing hook doesn't work as is, also see this
http://code.google.com/p/importers/source/browse/docs/index.rst

> Tavis
>
> On Tue, 16 Mar 2010, Aahz wrote:
>
>> On Tue, Mar 16, 2010, Tavis Rudd wrote:
>>>
>>> Wouldn't template inheritance with dynamic compilation just require
>>> installing the Cheetah import hook?
>>
>> Where is that documented?  This is the first I've heard of it, and I
>> don't see it anywhere at
>> http://www.cheetahtemplate.org/docs/users_guide_html/
>> --
>> Aahz (aahz@...)           <*>         http://www.pythoncraft.com/
>>
>> "Many customs in this life persist because they ease friction and promote
>> productivity as a result of universal agreement, and whether they are
>> precisely the optimal choices is much less important." --Henry Spencer
>>
>> ------------------------------------------------------------------------------
>> Download Intel® Parallel Studio Eval
>> Try the new software tools for yourself. Speed compiling, find bugs
>> proactively, and fine-tune applications for parallel performance.
>> See why Intel Parallel Studio got high marks during beta.
>> http://p.sf.net/sfu/intel-sw-dev
>> _______________________________________________
>> Cheetahtemplate-discuss mailing list
>> Cheetahtemplate-discuss@...
>> https://lists.sourceforge.net/lists/listinfo/cheetahtemplate-discuss
>>
>
> ------------------------------------------------------------------------------
> Download Intel® Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
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> https://lists.sourceforge.net/lists/listinfo/cheetahtemplate-discuss
>

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