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pingcap-inc / tidb2dw

Replicate data changes from TiDB to Data Warehouses in real-time
MIT License
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fix: display clear error message when user input invalid command of flag #60

Closed wd0517 closed 1 year ago

wd0517 commented 1 year ago

Currently, it always displays a usage message when an invalid command or flags are inputted, which can confuse the user.

This PR will provide users with a clearer error message.

❯ go run . dw
Error: unknown command "dw" for "tidb2dw"
Run 'tidb2dw --help' for usage.
❯ go run . -vv
Error: unknown flag: -vv
Run `tidb2dw --help` for usage.