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new UserError exception for reporting errors to the user

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This commit is contained in:
Adrian Sampson 2010-07-05 17:38:45 -07:00
parent 2719d4b5ec
commit 9aa13312d3
1 changed files with 11 additions and 1 deletions
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12
beets/ui/__init__.py
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@ -33,6 +33,12 @@ DEFAULT_DIRECTORY = '~/Music'
DEFAULT_PATH_FORMAT = '$artist/$album/$track $title'
# UI exception. Commands should throw this in order to display
# nonrecoverable errors to the user.
class UserError(Exception):
pass
# Utilities.
def print_(txt=''):
@ -364,4 +370,8 @@ def main():
path_format)
# Invoke the subcommand.
subcommand.func(lib, config, suboptions, subargs)
try:
subcommand.func(lib, config, suboptions, subargs)
except UserError, exc:
message = exc.args[0] if exc.args else None
subcommand.parser.error(message)