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registry,fleetctl: fix bugs regarding shadowed error variables - #1685
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lgtm thanks @dongsupark , don't know why or if golang is supposed to warn about a local variable that shadows another local variable. |
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September 21, 2016 10:44
When marshal() returns a non-nil error 'err', which shadows the pre-defined 'err', we should explicitly return the second error returned from marshal(). Otherwise it will always return nil. To fix other potential bugs, let's just return err explicitly. This was discovered by running go tool vet: $ go tool vet --shadow ./registry registry/job.go:316: declaration of "err" shadows declaration at registry/job.go:315
In matchLocalFileAndUnit(), if os.Stat() returns nil and getUnitFromFile() returns non-nil error, then in the end matchLocalFileAndUnit() will return (false, nil). That's not the expected result. It should have returned the second error that came from getUnitFromFile(). To avoid further potential bugs, let's follow the idiomatic coding style: first check err != nil, and fail-fast. This issue was discoverd by running go tools vet.
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@tixxdz Merged. Thanks for the review! |
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CreateUnit()explicitly return error: When
marshal()returns a non-nil error'err', which shadows the pre-defined'err', we should explicitly return the second error returned frommarshal(). Otherwise it will always returnnil. To fix other potential errors, let's just returnerrexplicitly. This was discovered by running "go tool vet":matchLocalFileAndUnit(): In
matchLocalFileAndUnit(), ifos.Stat()returns nil andgetUnitFromFile()returns non-nil error, then in the endmatchLocalFileAndUnit()will return(false, nil). That's not the expected result. It should have returned the second error that came fromgetUnitFromFile(). To avoid further potential bugs, let's follow the idiomatic coding style: first check "err != nil", and fail-fast. This issue was discovered by running "go tool vet".