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some function is needed by lots of cmds, eg: check destionation dir/file exist or not , and interactive with user.
for satisfy rule DONT REPEAT YOURSELF , i wonder if there's a way to define a common/pulic function for all cmds .
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some function is needed by lots of cmds, eg: check destionation dir/file exist or not , and interactive with user.
for satisfy rule DONT REPEAT YOURSELF , i wonder if there's a way to define a common/pulic function for all cmds .
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