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Warn when printf arg count is not a multiple of format count

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This commit is contained in:
Vidar Holen 2018-03-28 08:56:40 -07:00
parent ffed7caff4
commit 4aca1ff128
2 changed files with 4 additions and 1 deletions
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4
src/ShellCheck/Checks/Commands.hs
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@ -511,6 +511,8 @@ prop_checkPrintfVar8 = verifyNot checkPrintfVar "printf '%s %s %s' \"${var[@]}\"
prop_checkPrintfVar9 = verifyNot checkPrintfVar "printf '%s %s %s\\n' *.png"
prop_checkPrintfVar10= verifyNot checkPrintfVar "printf '%s %s %s' foo bar baz"
prop_checkPrintfVar11= verifyNot checkPrintfVar "printf '%(%s%s)T' -1"
prop_checkPrintfVar12= verify checkPrintfVar "printf '%s %s\\n' 1 2 3"
prop_checkPrintfVar13= verifyNot checkPrintfVar "printf '%s %s\\n' 1 2 3 4"
checkPrintfVar = CommandCheck (Exactly "printf") (f . arguments) where
f (doubledash:rest) | getLiteralString doubledash == Just "--" = f rest
f (dashv:var:rest) | getLiteralString dashv == Just "-v" = f rest
@ -536,7 +538,7 @@ checkPrintfVar = CommandCheck (Exactly "printf") (f . arguments) where
"This printf format string has no variables. Other arguments are ignored."
when (vars > 0
&& length more < vars
&& ((length more) `mod` vars /= 0 || null more)
&& all (not . mayBecomeMultipleArgs) more) $
warn (getId format) 2183 $
"This format string has " ++ show vars ++ " variables, but is passed " ++ show (length more) ++ " arguments."