xmlencoderclose: linter that checks xml.Encoder is closed

[adamdecaf]

xmlencoderclose is a linter which checks to make sure that xml.Encoder instances are closed. Without closing an Encoder it may not flush all data. Closing encoders also verifies the XML has balanced start/end tags.

We've identified a need for this linter at Moov and it has found several bugs.

$ xmlencoderclose ./...
/Users/adam/code/src/github.com/moov-io/1120x/pkg/utils/types.go:72:27: Encoder.Close must be called

$ xmlencoderclose ./...
/Users/adam/code/src/github.com/moov-io/fincen/pkg/service/handlers.go:109:18: Encoder.Close must be called

[boring-cyborg]

Hey, thank you for opening your first Pull Request !

[CLAassistant]

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[ldez]

In order for a pull request adding a linter to be reviewed, the linter and the PR must follow some requirements.

• The CLA must be signed

Pull Request Description

• It must have a link to the linter repository.
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Linter

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The Linter Tests Inside Golangci-lint

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.golangci.reference.yml

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Recommendations

• The linter should not use SSA. (SSA can be a problem with generics)
• The linter repository should have a readme and linting.
• The linter should be published as a binary. (useful to diagnose bug origins)

---

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This checklist does not imply that we will accept the linter.

[alexandear]

Very strange when the linter for XML depends on the sqlrows package. Could we rewrite linter's code to avoid github.com/gostaticanalysis/sqlrows dependency?

[adamdecaf]

Agreed. analysisutil.CalledFrom has some missing cases, so I filed a bug upstream.