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Suppress SC2094 when both are input redirections (fixes #2325)

This commit is contained in:
Vidar Holen 2021-09-18 17:59:30 -07:00
parent 2536507060
commit 8012f6761d
1 changed files with 9 additions and 0 deletions
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9
src/ShellCheck/Analytics.hs
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@ -791,6 +791,7 @@ prop_checkRedirectToSame5 = verifyNot checkRedirectToSame "foo > bar 2> bar"
prop_checkRedirectToSame6 = verifyNot checkRedirectToSame "echo foo > foo"
prop_checkRedirectToSame7 = verifyNot checkRedirectToSame "sed 's/foo/bar/g' file | sponge file"
prop_checkRedirectToSame8 = verifyNot checkRedirectToSame "while read -r line; do _=\"$fname\"; done <\"$fname\""
prop_checkRedirectToSame9 = verifyNot checkRedirectToSame "while read -r line; do cat < \"$fname\"; done <\"$fname\""
checkRedirectToSame params s@(T_Pipeline _ _ list) =
mapM_ (\l -> (mapM_ (\x -> doAnalysis (checkOccurrences x) l) (getAllRedirs list))) list
where
@ -799,6 +800,7 @@ checkRedirectToSame params s@(T_Pipeline _ _ list) =
checkOccurrences t@(T_NormalWord exceptId x) u@(T_NormalWord newId y) |
exceptId /= newId
&& x == y
&& not (isInput t && isInput u)
&& not (isOutput t && isOutput u)
&& not (special t)
&& not (any isHarmlessCommand [t,u])
@ -817,6 +819,13 @@ checkRedirectToSame params s@(T_Pipeline _ _ list) =
_ -> []
getRedirs _ = []
special x = "/dev/" `isPrefixOf` concat (oversimplify x)
isInput t =
case drop 1 $ getPath (parentMap params) t of
T_IoFile _ op _:_ ->
case op of
T_Less _ -> True
_ -> False
_ -> False
isOutput t =
case drop 1 $ getPath (parentMap params) t of
T_IoFile _ op _:_ ->