Task executioner similar to gulp for Python
Project description
Task manager similar to gulp for the processing of static files.
Working with Flask-Gulp
Setting up Flask-Gulp is quite easy. Here is an example:
from flask_gulp import Static static = Static(app)
This allows to add tasks with the task decorator:
@static.task('coffee')
def coffee_task():
src(r'static/coffee/**/*.coffee')\
.pipe(coffee(bare=True))\
.pipe(dest(output='static/js/'))
The src function is provided as a global to the task function scope along with all the extensions.
As you can see, the workflow is similar to gulp.
The js and css functions
Inspired by Flask-Funnel, the js and css functions are provided to the application context in order to generate the corresponding links:
<head>
<!-- ... -->
{{ css('less') }}
</head>
<body>
<!-- ... -->
{{ js('coffee', 'cjsx') }}
</body>
Each one receives multiple tasks names and generate the links to the generated files.
Extensions
Flask-Gulp comes shiped with four extensions, coffee, cjsx, less and dest. The first ones accept an executable setting, which holds the corresponding binary location, the default is to call it directly.
To add new extensions use the decorator provided with Flask-Gulp:
from flask_gulp.extensions import extension
@extension
def cjsx(resources):
command = ['cjsx', '-c', '-s']
bare = cjsx.settings.get('bare')
if bare:
command += ['-b']
for filename, data in resources:
process = subprocess.Popen(command,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = process.communicate(data)
if process.returncode:
yield None, err
else:
dest = replaceExt(filename, '.js')
yield dest, out
Each extension receive an iterable object which yields the name and content of each file. The function must return an iterable object with the same format for resulting files. Returning the new file name as None will be interpreted as an error.
The variable <function_name>.settings holds a dictionary with the keywords provided in the extension initialization, for instance cjsx(bare=True).
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