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Handle literal linefeeds in printf format strings (fixes #2007)

This commit is contained in:
Vidar Holen 2020-07-25 17:36:22 -07:00
parent 5d753212fb
commit 14e6806092
1 changed files with 9 additions and 5 deletions
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10
src/ShellCheck/Checks/Commands.hs
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@ -560,6 +560,8 @@ prop_checkPrintfVar18= verifyNot checkPrintfVar "printf '%-*s\\n' 1 2"
prop_checkPrintfVar19= verifyNot checkPrintfVar "printf '%(%s)T'"
prop_checkPrintfVar20= verifyNot checkPrintfVar "printf '%d %(%s)T' 42"
prop_checkPrintfVar21= verify checkPrintfVar "printf '%d %(%s)T'"
prop_checkPrintfVar22= verify checkPrintfVar "printf '%s\n%s' foo"
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
@ -602,6 +604,8 @@ prop_checkGetPrintfFormats2 = getPrintfFormats "%0*s" == "*s"
prop_checkGetPrintfFormats3 = getPrintfFormats "%(%s)T" == "T"
prop_checkGetPrintfFormats4 = getPrintfFormats "%d%%%(%s)T" == "dT"
prop_checkGetPrintfFormats5 = getPrintfFormats "%bPassed: %d, %bFailed: %d%b, Skipped: %d, %bErrored: %d%b\\n" == "bdbdbdbdb"
prop_checkGetPrintfFormats6 = getPrintfFormats "%s%s" == "ss"
prop_checkGetPrintfFormats7 = getPrintfFormats "%s\n%s" == "ss"
getPrintfFormats = getFormats
where
-- Get the arguments in the string as a string of type characters,
@ -620,15 +624,15 @@ getPrintfFormats = getFormats
regexBasedGetFormats rest =
case matchRegex re rest of
Just [width, precision, typ, rest] ->
Just [width, precision, typ, rest, _] ->
(if width == "*" then "*" else "") ++
(if precision == "*" then "*" else "") ++
typ ++ getFormats rest
Nothing -> take 1 rest ++ getFormats rest
where
-- constructed based on specifications in "man printf"
re = mkRegex "#?-?\\+? ?0?(\\*|\\d*)\\.?(\\d*|\\*)([diouxXfFeEgGaAcsbq])(.*)"
-- \____ _____/\___ ____/ \____ ____/\_________ _________/ \ /
re = mkRegex "#?-?\\+? ?0?(\\*|\\d*)\\.?(\\d*|\\*)([diouxXfFeEgGaAcsbq])((\n|.)*)"
-- \____ _____/\___ ____/ \____ ____/\_________ _________/ \______ /
-- V V V V V
-- flags field width precision format character rest
-- field width and precision can be specified with a '*' instead of a digit,