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Don't consider [ -n/-z/-v $var ] assignments for subshell modification (fixes #2217)

This commit is contained in:
Vidar Holen 2021-07-26 20:48:47 -07:00
parent c471e45822
commit fbc8d2cb2f
1 changed files with 16 additions and 2 deletions
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18
src/ShellCheck/Analytics.hs
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@ -1800,6 +1800,9 @@ prop_subshellAssignmentCheck17 = verifyNotTree subshellAssignmentCheck "foo=${ {
prop_subshellAssignmentCheck18 = verifyTree subshellAssignmentCheck "( exec {n}>&2; ); echo $n"
prop_subshellAssignmentCheck19 = verifyNotTree subshellAssignmentCheck "#!/bin/bash\nshopt -s lastpipe; echo a | read -r b; echo \"$b\""
prop_subshellAssignmentCheck20 = verifyTree subshellAssignmentCheck "@test 'foo' { a=1; }\n@test 'bar' { echo $a; }\n"
prop_subshellAssignmentCheck21 = verifyNotTree subshellAssignmentCheck "test1() { echo foo | if [[ $var ]]; then echo $var; fi; }; test2() { echo $var; }"
prop_subshellAssignmentCheck22 = verifyNotTree subshellAssignmentCheck "( [[ -n $foo || -z $bar ]] ); echo $foo $bar"
prop_subshellAssignmentCheck23 = verifyNotTree subshellAssignmentCheck "( export foo ); echo $foo"
subshellAssignmentCheck params t =
let flow = variableFlow params
check = findSubshelled flow [("oops",[])] Map.empty
@ -1807,8 +1810,19 @@ subshellAssignmentCheck params t =
findSubshelled [] _ _ = return ()
findSubshelled (Assignment x@(_, _, str, _):rest) ((reason,scope):lol) deadVars =
findSubshelled rest ((reason, x:scope):lol) $ Map.insert str Alive deadVars
findSubshelled (Assignment x@(_, _, str, data_):rest) scopes@((reason,scope):restscope) deadVars =
if isTrueAssignment data_
then findSubshelled rest ((reason, x:scope):restscope) $ Map.insert str Alive deadVars
else findSubshelled rest scopes deadVars
where
isTrueAssignment c =
case c of
DataString SourceChecked -> False
DataString SourceDeclaration -> False
DataArray SourceChecked -> False
DataArray SourceDeclaration -> False
_ -> True
findSubshelled (Reference (_, readToken, str):rest) scopes deadVars = do
unless (shouldIgnore str) $ case Map.findWithDefault Alive str deadVars of
Alive -> return ()