Baker - 簡化命令列選項的coding

以前要在script上增加命令列選項不外乎用optparse，或者是用新的argparse。
Baker比上面那兩個更簡單。只需要:

1. 在function的前面加一行@baker.command，該function就會成為command
2. 在if __name__ == "__main__"區塊中加入baker.run()

Example:

import baker

# Add command
@baker.command
def foo():
    "foo is test command"


# Add parameter help
@baker.command(params={"force": "Delete even if the file exists"})
def delete(filename, force=False):
    "Delete a file."

@baker.command
def delete2(filename, force=False):
    """Deletes a file.
    :param force: Delete even if the file exists.
    """
    pass


# Short options
@baker.command(shortopts={"verbose": "v"}, params={"verbose": "Spew lots"})
def test(verbose=False):
    "test command"

#Run script
if __name__ == "__main__":
    baker.run()

Output:

python test.py 

Usage: X:\test.py COMMAND <options>

Available commands:

 delete   Delete a file.
 delete2  Deletes a file.
 foo      foo is test command
 test

Use "X:\test.py <command> --help" for individual command help.

python test2.py delete2 --help

Usage: X:\test.py delete2 <filename>

Deletes a file.

Options:

 --force  Delete even if the file exists.

(specifying a single hyphen (-) in the argument list means all
subsequent arguments are treated as bare arguments, not options)

Reference:

• Baker 1.02 : Python Package Index
• Baker