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print a more helpful error message when running plakativ without any arguments on non-Windows systems

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Johannes 'josch' Schauer 2020-09-26 19:20:53 +02:00
parent 2c111d9936
commit b58392ec5a
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 9 additions and 0 deletions
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plakativ.py
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@ -2106,6 +2106,15 @@ def parse_pagesize_rectarg(string):
def main():
if len(sys.argv) == 1 and platform.system() != "Windows":
print("""
You called plakativ without arguments. At least one of the options --size,
--factor or --maxpages is required for running plakativ on the command line.
But maybe you meant to run the plakativ GUI instead? On platforms other than
Windows, the default is to run the command line interface. To run the graphical
user interface, run plakativ with the --gui option instead.
""", file=sys.stderr)
rendered_papersizes = ""
for k, v in sorted(papersizes.items()):
rendered_papersizes += " %-8s %s\n" % (papernames[k], v)