Merge branch 'master' into 1186

.ghci

@@ -1 +1 @@
-:set -idist/build/autogen
+:set -idist/build/autogen -isrc

CHANGELOG.md

@@ -16,6 +16,7 @@
 - Associative arrays are now respected in arithmetic contexts
 - SC1087 about `$var[@]` now correctly triggers on any index
 - Bad expansions in here documents are no longer ignored
+- FD move operations like {fd}>1- now parse correctly
 
 ### Changed
 - SC1073: 'else if' is now parsed correctly and not like 'elif'

src/ShellCheck/Analytics.hs

@@ -573,6 +573,7 @@ prop_checkRedirectToSame4 = verifyNot checkRedirectToSame "foo /dev/null > /dev/
 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\""
 checkRedirectToSame params s@(T_Pipeline _ _ list) =
     mapM_ (\l -> (mapM_ (\x -> doAnalysis (checkOccurrences x) l) (getAllRedirs list))) list
   where
@@ -583,7 +584,8 @@ checkRedirectToSame params s@(T_Pipeline _ _ list) =
                 && x == y
                 && not (isOutput t && isOutput u)
                 && not (special t)
-                && not (any isHarmlessCommand [t,u])) $ do
+                && not (any isHarmlessCommand [t,u])
+                && not (any containsAssignment [u])) $ do
             addComment $ note newId
             addComment $ note exceptId
     checkOccurrences _ _ = return ()
@@ -610,6 +612,9 @@ checkRedirectToSame params s@(T_Pipeline _ _ list) =
         cmd <- getClosestCommand (parentMap params) arg
         name <- getCommandBasename cmd
         return $ name `elem` ["echo", "printf", "sponge"]
+    containsAssignment arg = fromMaybe False $ do
+        cmd <- getClosestCommand (parentMap params) arg
+        return $ isAssignment cmd
 
 checkRedirectToSame _ _ = return ()
 
@@ -788,6 +793,8 @@ prop_checkSingleQuotedVariables11= verifyNot checkSingleQuotedVariables "sed '${
 prop_checkSingleQuotedVariables12= verifyNot checkSingleQuotedVariables "eval 'echo $1'"
 prop_checkSingleQuotedVariables13= verifyNot checkSingleQuotedVariables "busybox awk '{print $1}'"
 prop_checkSingleQuotedVariables14= verifyNot checkSingleQuotedVariables "[ -v 'bar[$foo]' ]"
+prop_checkSingleQuotedVariables15= verifyNot checkSingleQuotedVariables "git filter-branch 'test $GIT_COMMIT'"
+prop_checkSingleQuotedVariables16= verify checkSingleQuotedVariables "git '$a'"
 checkSingleQuotedVariables params t@(T_SingleQuoted id s) =
     when (s `matches` re) $
         if "sed" == commandName
@@ -800,7 +807,7 @@ checkSingleQuotedVariables params t@(T_SingleQuoted id s) =
     commandName = fromMaybe "" $ do
         cmd <- getClosestCommand parents t
         name <- getCommandBasename cmd
-        return $ if name == "find" then getFindCommand cmd else name
+        return $ if name == "find" then getFindCommand cmd else if name == "git" then getGitCommand cmd else name
 
     isProbablyOk =
             any isOkAssignment (take 3 $ getPath parents t)
@@ -819,6 +826,7 @@ checkSingleQuotedVariables params t@(T_SingleQuoted id s) =
                 ,"dpkg-query"
                 ,"jq"  -- could also check that user provides --arg
                 ,"unset"
+                ,"git filter-branch"
                 ]
             || "awk" `isSuffixOf` commandName
             || "perl" `isPrefixOf` commandName
@@ -842,6 +850,12 @@ checkSingleQuotedVariables params t@(T_SingleQuoted id s) =
             _ -> "find"
     getFindCommand (T_Redirecting _ _ cmd) = getFindCommand cmd
     getFindCommand _ = "find"
+    getGitCommand (T_SimpleCommand _ _ words) =
+        case map getLiteralString words of
+            Just "git":Just "filter-branch":_ -> "git filter-branch"
+            _ -> "git"
+    getGitCommand (T_Redirecting _ _ cmd) = getGitCommand cmd
+    getGitCommand _ = "git"
 checkSingleQuotedVariables _ _ = return ()
 
 
@@ -1402,6 +1416,7 @@ prop_checkSpuriousExec4 = verifyNot checkSpuriousExec "if a; then exec b; fi"
 prop_checkSpuriousExec5 = verifyNot checkSpuriousExec "exec > file; cmd"
 prop_checkSpuriousExec6 = verify checkSpuriousExec "exec foo > file; cmd"
 prop_checkSpuriousExec7 = verifyNot checkSpuriousExec "exec file; echo failed; exit 3"
+prop_checkSpuriousExec8 = verifyNot checkSpuriousExec "exec {origout}>&1- >tmp.log 2>&1; bar"
 checkSpuriousExec _ = doLists
   where
     doLists (T_Script _ _ cmds) = doList cmds
@@ -1801,6 +1816,7 @@ prop_checkUnused35= verifyNotTree checkUnusedAssignments "a=foo; b=2; echo ${a:b
 prop_checkUnused36= verifyNotTree checkUnusedAssignments "if [[ -v foo ]]; then true; fi"
 prop_checkUnused37= verifyNotTree checkUnusedAssignments "fd=2; exec {fd}>&-"
 prop_checkUnused38= verifyTree checkUnusedAssignments "(( a=42 ))"
+prop_checkUnused39= verifyNotTree checkUnusedAssignments "declare -x -f foo"
 checkUnusedAssignments params t = execWriter (mapM_ warnFor unused)
   where
     flow = variableFlow params
@@ -1818,7 +1834,7 @@ checkUnusedAssignments params t = execWriter (mapM_ warnFor unused)
 
     warnFor (name, token) =
         warn (getId token) 2034 $
-            name ++ " appears unused. Verify it or export it."
+            name ++ " appears unused. Verify use (or export if used externally)."
 
     stripSuffix = takeWhile isVariableChar
     defaultMap = Map.fromList $ zip internalVariables $ repeat ()

src/ShellCheck/AnalyzerLib.hs

@@ -498,7 +498,9 @@ getReferencedVariableCommand base@(T_SimpleCommand _ _ (T_NormalWord _ (T_Litera
         "export" -> if "f" `elem` flags
             then []
             else concatMap getReference rest
-        "declare" -> if any (`elem` flags) ["x", "p"]
+        "declare" -> if
+                any (`elem` flags) ["x", "p"] &&
+                    (not $ any (`elem` flags) ["f", "F"])
             then concatMap getReference rest
             else []
         "readonly" ->

src/ShellCheck/Checks/Commands.hs

@@ -513,6 +513,8 @@ 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"
+prop_checkPrintfVar14= verify checkPrintfVar "printf '%*s\\n' 1"
+prop_checkPrintfVar15= verifyNot checkPrintfVar "printf '%*s\\n' 1 2"
 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
@@ -523,6 +525,7 @@ checkPrintfVar = CommandCheck (Exactly "printf") (f . arguments) where
         case string of
             '%':'%':rest -> countFormats rest
             '%':'(':rest -> 1 + countFormats (dropWhile (/= ')') rest)
+            '%':'*':rest -> 2 + countFormats rest -- width is specified as an argument
             '%':rest -> 1 + countFormats rest
             _:rest -> countFormats rest
             [] -> 0

src/ShellCheck/Parser.hs

@@ -1223,12 +1223,6 @@ doubleQuotedPart = readDoubleLiteral <|> readDoubleQuotedDollar <|> readQuotedBa
             "This is a unicode quote. Delete and retype it (or ignore/singlequote for literal)."
         return $ T_Literal id [c]
 
-readDoubleQuotedLiteral = do
-    doubleQuote
-    x <- readDoubleLiteral
-    doubleQuote
-    return x
-
 readDoubleLiteral = do
     id <- getNextId
     s <- many1 readDoubleLiteralPart
@@ -1716,8 +1710,15 @@ readIoFileOp = choice [g_DGREAT, g_LESSGREAT, g_GREATAND, g_LESSAND, g_CLOBBER,
 readIoDuplicate = try $ do
     id <- getNextId
     op <- g_GREATAND <|> g_LESSAND
-    target <- readIoVariable <|> many1 digit <|> string "-"
+    target <- readIoVariable <|> digitsAndOrDash
     return $ T_IoDuplicate id op target
+  where
+    -- either digits with optional dash, or a required dash
+    digitsAndOrDash = do
+        str <- many digit
+        dash <- (if null str then id else option "") $ string "-"
+        return $ str ++ dash
+
 
 prop_readIoFile = isOk readIoFile ">> \"$(date +%YYmmDD)\""
 readIoFile = called "redirection" $ do
@@ -1744,6 +1745,7 @@ prop_readIoRedirect3 = isOk readIoRedirect "4>&-"
 prop_readIoRedirect4 = isOk readIoRedirect "&> lol"
 prop_readIoRedirect5 = isOk readIoRedirect "{foo}>&2"
 prop_readIoRedirect6 = isOk readIoRedirect "{foo}<&-"
+prop_readIoRedirect7 = isOk readIoRedirect "{foo}>&1-"
 readIoRedirect = do
     id <- getNextId
     n <- readIoSource