Builds a path inside an application folder

Parameters
----------
path:
    path within the application folder
r:
    the global request object

Builds a w2p package for the application

Parameters
----------
app:
    application name
request:
    the global request object

Returns
-------
filename:
    filename of the w2p file or None on error

Builds a w2p bytecode-compiled package for the application

Parameters
----------
app:
    application name
request:
    the global request object

Returns
-------
filename:
    filename of the w2p file or None on error

Removes session, cache and error files

Parameters
----------
app:
    application name
request:
    the global request object

Compiles the application

Parameters
----------
app:
    application name
request:
    the global request object

Create a copy of welcome.w2p (scaffolding) app

Parameters
----------
app:
    application name
request:
    the global request object

Installs an application:

- Identifies file type by filename
- Writes `fobj` contents to the `../deposit/` folder
- Calls `w2p_unpack()` to do the job.

Parameters
----------
app:
    new application name
fobj:
    file object containing the application to be installed
request:
    the global request object
filename:
    original filename of the `fobj`, required to determine extension

Returns
-------
upname:
    name of the file where app is temporarily stored or `None` on failure

Uninstalls the application.

Parameters
----------
app:
    application name
request:
    the global request object

Returns
-------
`True` on success, `False` on failure

Builds a w2p package for the application

Parameters
----------
app:
    application name
plugin_name:
    the name of the plugin without plugin_ prefix
request:
    the current request app

Returns
-------
filename:
    filename of the w2p file or None on error

Installs an application:

- Identifies file type by filename
- Writes `fobj` contents to the `../deposit/` folder
- Calls `w2p_unpack()` to do the job.

Parameters
----------
app:
    new application name
fobj:
    file object containing the application to be installed
request:
    the global request object
filename:
    original filename of the `fobj`, required to determine extension

Returns
-------
upname:
    name of the file where app is temporarily stored or `None` on failure

Compares current web2py's version with the latest stable web2py version.

Parameters
----------
myversion:
    the current version as stored in file `web2py/VERSION`
version_URL:
    the URL that contains the version of the latest stable release

Returns
-------
state:
    `True` if upgrade available, `False` if current version if up-to-date,
    -1 on error
version:
    the most up-to-version available

Upgrades web2py (src, osx, win) is a new version is posted.
It detects whether src, osx or win is running and downloads the right one

Parameters
----------
request:
    the current request object, required to determine version and path
url:
    the incomplete url where to locate the latest web2py
    actual url is url+'/examples/static/web2py_(src|osx|win).zip'

Returns
-------
    True on success, False on failure (network problem or old version)