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Fix "End of file during parsing" when no errors with tslint #981

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@thieman
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thieman commented Jun 3, 2016

Ping @Simplify since you seem to be responsible for the tslint integration. Thanks, by the way! 馃槃

When outputting to JSON format, tslint returns nothing
(empty string) if there are no errors. Passing empty string to
json-read-from-string throws an "End of file during parsing" error.

This patch replaces empty string with a valid empty JSON object,
which allows the Flycheck pass to complete normally.

flycheck.el Outdated
@@ -5361,7 +5361,7 @@ the BUFFER that was checked respectively.
See URL `https://palantir.github.io/tslint/' for more information
about TSLint."
(let* ((json-array-type 'list)
(tslint-json-output (json-read-from-string output))
(tslint-json-output (json-read-from-string (if (eq output "") "{}" output)))

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lunaryorn Jun 3, 2016

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@thieman You can simplify this to (and (not (string-empty-p output)) (json-read-from-string output)). That'll return nil if there's no output.

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lunaryorn commented Jun 3, 2016

@thieman Thanks 馃憤 You can simplify the test, though, see my comment.

/cc @flycheck/typescript

Fix "End of file during parsing" when no errors with tslint
When outputting to JSON format, tslint returns nothing
(empty string) if there are no errors. Passing empty string to
json-read-from-string throws an "End of file during parsing" error.

This patch sets the intermediate variable to nil instead of
throwing an error, which allows the Flycheck pass to complete normally.

@thieman thieman force-pushed the thieman:thieman-tslint-no-errors-parsing branch from b4040c0 to e0d61f8 Jun 3, 2016

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thieman commented Jun 3, 2016

Fixed to use your version, thanks!

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lunaryorn commented Jun 4, 2016

@thieman Thanks, merged :)

@Simplify

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Simplify commented Jun 4, 2016

@thieman Thanks a lot!

@thieman thieman deleted the thieman:thieman-tslint-no-errors-parsing branch Jun 4, 2016

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