mirror of
https://github.com/koalaman/shellcheck.git
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Moved the various AST convenience functions to a separate module.
This commit is contained in:
Vidar Holen
@@ -47,6 +47,7 @@ library
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QuickCheck >= 2.7.4
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exposed-modules:
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ShellCheck.AST
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ShellCheck.ASTLib
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ShellCheck.Analytics
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ShellCheck.Analyzer
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ShellCheck.Checker
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@@ -357,10 +357,3 @@ doAnalysis f = analyze f blank id
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doStackAnalysis startToken endToken = analyze startToken endToken id
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doTransform i = runIdentity . analyze blank blank i
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isLoop t = case t of
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T_WhileExpression {} -> True
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T_UntilExpression {} -> True
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T_ForIn {} -> True
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T_ForArithmetic {} -> True
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T_SelectIn {} -> True
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_ -> False
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240
ShellCheck/ASTLib.hs
Normal file
240
ShellCheck/ASTLib.hs
Normal file
@@ -0,0 +1,240 @@
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{-
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Copyright 2012-2015 Vidar Holen
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This file is part of ShellCheck.
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http://www.vidarholen.net/contents/shellcheck
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ShellCheck is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ShellCheck is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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-}
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module ShellCheck.ASTLib where
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import ShellCheck.AST
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import Control.Monad
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import Data.List
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import Data.Maybe
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-- Is this a type of loop?
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isLoop t = case t of
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T_WhileExpression {} -> True
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T_UntilExpression {} -> True
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T_ForIn {} -> True
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T_ForArithmetic {} -> True
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T_SelectIn {} -> True
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_ -> False
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-- Will this split into multiple words when used as an argument?
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willSplit x =
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case x of
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T_DollarBraced {} -> True
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T_DollarExpansion {} -> True
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T_Backticked {} -> True
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T_BraceExpansion {} -> True
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T_Glob {} -> True
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T_Extglob {} -> True
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T_NormalWord _ l -> any willSplit l
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_ -> False
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isGlob (T_Extglob {}) = True
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isGlob (T_Glob {}) = True
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isGlob (T_NormalWord _ l) = any isGlob l
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isGlob _ = False
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-- Is this shell word a constant?
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isConstant token =
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case token of
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T_NormalWord _ l -> all isConstant l
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T_DoubleQuoted _ l -> all isConstant l
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T_SingleQuoted _ _ -> True
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T_Literal _ _ -> True
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_ -> False
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-- Is this an empty literal?
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isEmpty token =
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case token of
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T_NormalWord _ l -> all isEmpty l
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T_DoubleQuoted _ l -> all isEmpty l
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T_SingleQuoted _ "" -> True
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T_Literal _ "" -> True
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_ -> False
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-- Quick&lazy oversimplification of commands, throwing away details
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-- and returning a list like ["find", ".", "-name", "${VAR}*" ].
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oversimplify token =
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case token of
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(T_NormalWord _ l) -> [concat (concatMap oversimplify l)]
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(T_DoubleQuoted _ l) -> [concat (concatMap oversimplify l)]
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(T_SingleQuoted _ s) -> [s]
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(T_DollarBraced _ _) -> ["${VAR}"]
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(T_DollarArithmetic _ _) -> ["${VAR}"]
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(T_DollarExpansion _ _) -> ["${VAR}"]
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(T_Backticked _ _) -> ["${VAR}"]
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(T_Glob _ s) -> [s]
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(T_Pipeline _ _ [x]) -> oversimplify x
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(T_Literal _ x) -> [x]
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(T_SimpleCommand _ vars words) -> concatMap oversimplify words
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(T_Redirecting _ _ foo) -> oversimplify foo
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(T_DollarSingleQuoted _ s) -> [s]
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(T_Annotation _ _ s) -> oversimplify s
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-- Workaround for let "foo = bar" parsing
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(TA_Sequence _ [TA_Expansion _ v]) -> concatMap oversimplify v
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otherwise -> []
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-- Turn a SimpleCommand foo -avz --bar=baz into args "a", "v", "z", "bar",
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-- each in a tuple of (token, stringFlag).
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getFlagsUntil stopCondition (T_SimpleCommand _ _ (_:args)) =
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let textArgs = takeWhile (not . stopCondition . snd) $ map (\x -> (x, concat $ oversimplify x)) args in
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concatMap flag textArgs
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where
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flag (x, '-':'-':arg) = [ (x, takeWhile (/= '=') arg) ]
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flag (x, '-':args) = map (\v -> (x, [v])) args
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flag _ = []
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getFlagsUntil _ _ = error "Internal shellcheck error, please report! (getFlags on non-command)"
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-- Get all flags in a GNU way, up until --
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getAllFlags = getFlagsUntil (== "--")
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-- Get all flags in a BSD way, up until first non-flag argument
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getLeadingFlags = getFlagsUntil (not . ("-" `isPrefixOf`))
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-- Given a T_DollarBraced, return a simplified version of the string contents.
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bracedString (T_DollarBraced _ l) = concat $ oversimplify l
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bracedString _ = error "Internal shellcheck error, please report! (bracedString on non-variable)"
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-- Is this an expansion of multiple items of an array?
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isArrayExpansion t@(T_DollarBraced _ _) =
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let string = bracedString t in
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"@" `isPrefixOf` string ||
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not ("#" `isPrefixOf` string) && "[@]" `isInfixOf` string
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isArrayExpansion _ = False
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-- Is it possible that this arg becomes multiple args?
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mayBecomeMultipleArgs t = willBecomeMultipleArgs t || f t
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where
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f t@(T_DollarBraced _ _) =
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let string = bracedString t in
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"!" `isPrefixOf` string
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f (T_DoubleQuoted _ parts) = any f parts
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f (T_NormalWord _ parts) = any f parts
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f _ = False
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-- Is it certain that this word will becomes multiple words?
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willBecomeMultipleArgs t = willConcatInAssignment t || f t
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where
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f (T_Extglob {}) = True
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f (T_Glob {}) = True
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f (T_BraceExpansion {}) = True
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f (T_DoubleQuoted _ parts) = any f parts
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f (T_NormalWord _ parts) = any f parts
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f _ = False
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-- This does token cause implicit concatenation in assignments?
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willConcatInAssignment token =
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case token of
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t@(T_DollarBraced {}) -> isArrayExpansion t
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(T_DoubleQuoted _ parts) -> any willConcatInAssignment parts
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(T_NormalWord _ parts) -> any willConcatInAssignment parts
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_ -> False
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-- Maybe get the literal string corresponding to this token
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getLiteralString :: Token -> Maybe String
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getLiteralString = getLiteralStringExt (const Nothing)
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-- Definitely get a literal string, skipping over all non-literals
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onlyLiteralString :: Token -> String
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onlyLiteralString = fromJust . getLiteralStringExt (const $ return "")
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-- Maybe get a literal string, but only if it's an unquoted argument.
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getUnquotedLiteral (T_NormalWord _ list) =
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liftM concat $ mapM str list
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where
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str (T_Literal _ s) = return s
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str _ = Nothing
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getUnquotedLiteral _ = Nothing
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-- Maybe get the literal string of this token and any globs in it.
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getGlobOrLiteralString = getLiteralStringExt f
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where
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f (T_Glob _ str) = return str
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f _ = Nothing
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-- Maybe get the literal value of a token, using a custom function
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-- to map unrecognized Tokens into strings.
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getLiteralStringExt :: (Token -> Maybe String) -> Token -> Maybe String
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getLiteralStringExt more = g
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where
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allInList = liftM concat . mapM g
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g (T_DoubleQuoted _ l) = allInList l
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g (T_DollarDoubleQuoted _ l) = allInList l
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g (T_NormalWord _ l) = allInList l
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g (TA_Expansion _ l) = allInList l
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g (T_SingleQuoted _ s) = return s
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g (T_Literal _ s) = return s
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g x = more x
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-- Is this token a string literal?
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isLiteral t = isJust $ getLiteralString t
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-- Turn a NormalWord like foo="bar $baz" into a series of constituent elements like [foo=,bar ,$baz]
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getWordParts (T_NormalWord _ l) = concatMap getWordParts l
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getWordParts (T_DoubleQuoted _ l) = l
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getWordParts other = [other]
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-- Return a list of NormalWords that would result from brace expansion
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braceExpand (T_NormalWord id list) = take 1000 $ do
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items <- mapM part list
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return $ T_NormalWord id items
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where
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part (T_BraceExpansion id items) = do
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item <- items
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braceExpand item
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part x = return x
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-- Maybe get the command name of a token representing a command
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getCommandName t =
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case t of
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T_Redirecting _ _ w -> getCommandName w
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T_SimpleCommand _ _ (w:_) -> getLiteralString w
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T_Annotation _ _ t -> getCommandName t
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otherwise -> Nothing
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-- Get the basename of a token representing a command
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getCommandBasename = liftM basename . getCommandName
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where
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basename = reverse . takeWhile (/= '/') . reverse
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isAssignment t =
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case t of
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T_Redirecting _ _ w -> isAssignment w
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T_SimpleCommand _ (w:_) [] -> True
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T_Assignment {} -> True
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T_Annotation _ _ w -> isAssignment w
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otherwise -> False
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-- Get the list of commands from tokens that contain them, such as
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-- the body of while loops and if statements.
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getCommandSequences t =
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case t of
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T_Script _ _ cmds -> [cmds]
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T_BraceGroup _ cmds -> [cmds]
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T_Subshell _ cmds -> [cmds]
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T_WhileExpression _ _ cmds -> [cmds]
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T_UntilExpression _ _ cmds -> [cmds]
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T_ForIn _ _ _ cmds -> [cmds]
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T_ForArithmetic _ _ _ _ cmds -> [cmds]
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T_IfExpression _ thens elses -> map snd thens ++ [elses]
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otherwise -> []
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@@ -21,6 +21,7 @@
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module ShellCheck.Analytics (runAnalytics, ShellCheck.Analytics.runTests) where
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import ShellCheck.AST
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import ShellCheck.ASTLib
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import ShellCheck.Data
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import ShellCheck.Parser
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import ShellCheck.Interface
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@@ -104,11 +105,10 @@ runList spec list = notes
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}
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notes = concatMap (\f -> f params root) list
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getCode (TokenComment _ (Comment _ c _)) = c
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checkList l t = concatMap (\f -> f t) l
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getCode (TokenComment _ (Comment _ c _)) = c
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prop_determineShell0 = determineShell (T_Script (Id 0) "#!/bin/sh" []) == Sh
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prop_determineShell1 = determineShell (T_Script (Id 0) "#!/usr/bin/env ksh" []) == Ksh
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prop_determineShell2 = determineShell (T_Script (Id 0) "" []) == Bash
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@@ -251,22 +251,6 @@ isVariableName _ = False
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potentially = fromMaybe (return ())
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willSplit x =
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case x of
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T_DollarBraced {} -> True
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T_DollarExpansion {} -> True
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||||
T_Backticked {} -> True
|
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T_BraceExpansion {} -> True
|
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T_Glob {} -> True
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T_Extglob {} -> True
|
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T_NormalWord _ l -> any willSplit l
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_ -> False
|
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|
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isGlob (T_Extglob {}) = True
|
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isGlob (T_Glob {}) = True
|
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isGlob (T_NormalWord _ l) = any isGlob l
|
||||
isGlob _ = False
|
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|
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wouldHaveBeenGlob s = '*' `elem` s
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|
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isConfusedGlobRegex ('*':_) = True
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@@ -288,59 +272,6 @@ getSuspiciousRegexWildcard str =
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headOrDefault _ (a:_) = a
|
||||
headOrDefault def _ = def
|
||||
|
||||
isConstant token =
|
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case token of
|
||||
T_NormalWord _ l -> all isConstant l
|
||||
T_DoubleQuoted _ l -> all isConstant l
|
||||
T_SingleQuoted _ _ -> True
|
||||
T_Literal _ _ -> True
|
||||
_ -> False
|
||||
|
||||
isEmpty token =
|
||||
case token of
|
||||
T_NormalWord _ l -> all isEmpty l
|
||||
T_DoubleQuoted _ l -> all isEmpty l
|
||||
T_SingleQuoted _ "" -> True
|
||||
T_Literal _ "" -> True
|
||||
_ -> False
|
||||
|
||||
makeSimple (T_NormalWord _ [f]) = f
|
||||
makeSimple (T_Redirecting _ _ f) = f
|
||||
makeSimple (T_Annotation _ _ f) = f
|
||||
makeSimple t = t
|
||||
simplify = doTransform makeSimple
|
||||
|
||||
deadSimple (T_NormalWord _ l) = [concat (concatMap deadSimple l)]
|
||||
deadSimple (T_DoubleQuoted _ l) = [concat (concatMap deadSimple l)]
|
||||
deadSimple (T_SingleQuoted _ s) = [s]
|
||||
deadSimple (T_DollarBraced _ _) = ["${VAR}"]
|
||||
deadSimple (T_DollarArithmetic _ _) = ["${VAR}"]
|
||||
deadSimple (T_DollarExpansion _ _) = ["${VAR}"]
|
||||
deadSimple (T_Backticked _ _) = ["${VAR}"]
|
||||
deadSimple (T_Glob _ s) = [s]
|
||||
deadSimple (T_Pipeline _ _ [x]) = deadSimple x
|
||||
deadSimple (T_Literal _ x) = [x]
|
||||
deadSimple (T_SimpleCommand _ vars words) = concatMap deadSimple words
|
||||
deadSimple (T_Redirecting _ _ foo) = deadSimple foo
|
||||
deadSimple (T_DollarSingleQuoted _ s) = [s]
|
||||
deadSimple (T_Annotation _ _ s) = deadSimple s
|
||||
-- Workaround for let "foo = bar" parsing
|
||||
deadSimple (TA_Sequence _ [TA_Expansion _ v]) = concatMap deadSimple v
|
||||
deadSimple _ = []
|
||||
|
||||
-- Turn a SimpleCommand foo -avz --bar=baz into args ["a", "v", "z", "bar"]
|
||||
getFlagsUntil stopCondition (T_SimpleCommand _ _ (_:args)) =
|
||||
let textArgs = takeWhile (not . stopCondition . snd) $ map (\x -> (x, concat $ deadSimple x)) args in
|
||||
concatMap flag textArgs
|
||||
where
|
||||
flag (x, '-':'-':arg) = [ (x, takeWhile (/= '=') arg) ]
|
||||
flag (x, '-':args) = map (\v -> (x, [v])) args
|
||||
flag _ = []
|
||||
|
||||
getFlagsUntil _ _ = error "Internal shellcheck error, please report! (getFlags on non-command)"
|
||||
|
||||
getAllFlags = getFlagsUntil (== "--")
|
||||
getLeadingFlags = getFlagsUntil (not . ("-" `isPrefixOf`))
|
||||
|
||||
(!!!) list i =
|
||||
case drop i list of
|
||||
@@ -425,8 +356,8 @@ checkEchoWc _ (T_Pipeline id _ [a, b]) =
|
||||
["wc", "-m"] -> countMsg
|
||||
_ -> return ()
|
||||
where
|
||||
acmd = deadSimple a
|
||||
bcmd = deadSimple b
|
||||
acmd = oversimplify a
|
||||
bcmd = oversimplify b
|
||||
countMsg = style id 2000 "See if you can use ${#variable} instead."
|
||||
checkEchoWc _ _ = return ()
|
||||
|
||||
@@ -447,8 +378,8 @@ checkEchoSed _ (T_Pipeline id _ [a, b]) =
|
||||
guard $ length delimiters == 2
|
||||
return True
|
||||
|
||||
acmd = deadSimple a
|
||||
bcmd = deadSimple b
|
||||
acmd = oversimplify a
|
||||
bcmd = oversimplify b
|
||||
checkIn s =
|
||||
when (isSimpleSed s) $
|
||||
style id 2001 "See if you can use ${variable//search/replace} instead."
|
||||
@@ -467,7 +398,7 @@ prop_checkAssignAteCommand3 = verify checkAssignAteCommand "A=cat foo | grep bar
|
||||
prop_checkAssignAteCommand4 = verifyNot checkAssignAteCommand "A=foo ls -l"
|
||||
prop_checkAssignAteCommand5 = verifyNot checkAssignAteCommand "PAGER=cat grep bar"
|
||||
checkAssignAteCommand _ (T_SimpleCommand id (T_Assignment _ _ _ _ assignmentTerm:[]) (firstWord:_)) =
|
||||
when ("-" `isPrefixOf` concat (deadSimple firstWord) ||
|
||||
when ("-" `isPrefixOf` concat (oversimplify firstWord) ||
|
||||
isCommonCommand (getLiteralString assignmentTerm)
|
||||
&& not (isCommonCommand (getLiteralString firstWord))) $
|
||||
warn id 2037 "To assign the output of a command, use var=$(cmd) ."
|
||||
@@ -551,7 +482,7 @@ prop_checkPipePitfalls7 = verifyNot checkPipePitfalls "find . -printf '%s\\n' |
|
||||
checkPipePitfalls _ (T_Pipeline id _ commands) = do
|
||||
for ["find", "xargs"] $
|
||||
\(find:xargs:_) ->
|
||||
let args = deadSimple xargs ++ deadSimple find
|
||||
let args = oversimplify xargs ++ oversimplify find
|
||||
in
|
||||
unless (any ($ args) [
|
||||
hasShortParameter '0',
|
||||
@@ -578,12 +509,12 @@ checkPipePitfalls _ (T_Pipeline id _ commands) = do
|
||||
]
|
||||
unless didLs $ do
|
||||
for ["ls", "?"] $
|
||||
\(ls:_) -> unless (hasShortParameter 'N' (deadSimple ls)) $
|
||||
\(ls:_) -> unless (hasShortParameter 'N' (oversimplify ls)) $
|
||||
info (getId ls) 2012 "Use find instead of ls to better handle non-alphanumeric filenames."
|
||||
return ()
|
||||
where
|
||||
for l f =
|
||||
let indices = indexOfSublists l (map (headOrDefault "" . deadSimple) commands)
|
||||
let indices = indexOfSublists l (map (headOrDefault "" . oversimplify) commands)
|
||||
in do
|
||||
mapM_ (f . (\ n -> take (length l) $ drop n commands)) indices
|
||||
return . not . null $ indices
|
||||
@@ -609,39 +540,6 @@ indexOfSublists sub = f 0
|
||||
match _ _ = False
|
||||
|
||||
|
||||
bracedString l = concat $ deadSimple l
|
||||
|
||||
isArrayExpansion (T_DollarBraced _ l) =
|
||||
let string = bracedString l in
|
||||
"@" `isPrefixOf` string ||
|
||||
not ("#" `isPrefixOf` string) && "[@]" `isInfixOf` string
|
||||
isArrayExpansion _ = False
|
||||
|
||||
-- Is it certain that this arg will becomes multiple args?
|
||||
willBecomeMultipleArgs t = willConcatInAssignment t || f t
|
||||
where
|
||||
f (T_Extglob {}) = True
|
||||
f (T_Glob {}) = True
|
||||
f (T_BraceExpansion {}) = True
|
||||
f (T_DoubleQuoted _ parts) = any f parts
|
||||
f (T_NormalWord _ parts) = any f parts
|
||||
f _ = False
|
||||
|
||||
willConcatInAssignment t@(T_DollarBraced {}) = isArrayExpansion t
|
||||
willConcatInAssignment (T_DoubleQuoted _ parts) = any willConcatInAssignment parts
|
||||
willConcatInAssignment (T_NormalWord _ parts) = any willConcatInAssignment parts
|
||||
willConcatInAssignment _ = False
|
||||
|
||||
-- Is it possible that this arg becomes multiple args?
|
||||
mayBecomeMultipleArgs t = willBecomeMultipleArgs t || f t
|
||||
where
|
||||
f (T_DollarBraced _ l) =
|
||||
let string = bracedString l in
|
||||
"!" `isPrefixOf` string
|
||||
f (T_DoubleQuoted _ parts) = any f parts
|
||||
f (T_NormalWord _ parts) = any f parts
|
||||
f _ = False
|
||||
|
||||
prop_checkShebangParameters1 = verifyTree checkShebangParameters "#!/usr/bin/env bash -x\necho cow"
|
||||
prop_checkShebangParameters2 = verifyNotTree checkShebangParameters "#! /bin/sh -l "
|
||||
checkShebangParameters _ (T_Script id sb _) =
|
||||
@@ -723,8 +621,8 @@ checkBashisms _ = bashism
|
||||
mapM_ check expansion
|
||||
when (var `elem` bashVars) $ warnMsg id $ var ++ " is"
|
||||
where
|
||||
str = concat $ deadSimple token
|
||||
var = getBracedReference (bracedString token)
|
||||
str = bracedString t
|
||||
var = getBracedReference str
|
||||
check (regex, feature) =
|
||||
when (isJust $ matchRegex regex str) $ warnMsg id feature
|
||||
|
||||
@@ -741,9 +639,9 @@ checkBashisms _ = bashism
|
||||
| t `isCommand` "echo" && "-" `isPrefixOf` argString =
|
||||
unless ("--" `isPrefixOf` argString) $ -- echo "-------"
|
||||
warnMsg (getId arg) "echo flags are"
|
||||
where argString = concat $ deadSimple arg
|
||||
where argString = concat $ oversimplify arg
|
||||
bashism t@(T_SimpleCommand _ _ (cmd:arg:_))
|
||||
| t `isCommand` "exec" && "-" `isPrefixOf` concat (deadSimple arg) =
|
||||
| t `isCommand` "exec" && "-" `isPrefixOf` concat (oversimplify arg) =
|
||||
warnMsg (getId arg) "exec flags are"
|
||||
bashism t@(T_SimpleCommand id _ _)
|
||||
| t `isCommand` "let" = warnMsg id "'let' is"
|
||||
@@ -844,7 +742,7 @@ checkForInLs _ = try
|
||||
check id f x
|
||||
try _ = return ()
|
||||
check id f x =
|
||||
case deadSimple x of
|
||||
case oversimplify x of
|
||||
("ls":n) ->
|
||||
let warntype = if any ("-" `isPrefixOf`) n then warn else err in
|
||||
warntype id 2045 "Iterating over ls output is fragile. Use globs."
|
||||
@@ -941,7 +839,7 @@ checkRedirectToSame params s@(T_Pipeline _ _ list) =
|
||||
T_DGREAT _ -> [file]
|
||||
_ -> []
|
||||
getRedirs _ = []
|
||||
special x = "/dev/" `isPrefixOf` concat (deadSimple x)
|
||||
special x = "/dev/" `isPrefixOf` concat (oversimplify x)
|
||||
isOutput t =
|
||||
case drop 1 $ getPath (parentMap params) t of
|
||||
T_IoFile _ op _:_ ->
|
||||
@@ -971,8 +869,8 @@ checkShorthandIf _ _ = return ()
|
||||
|
||||
prop_checkDollarStar = verify checkDollarStar "for f in $*; do ..; done"
|
||||
prop_checkDollarStar2 = verifyNot checkDollarStar "a=$*"
|
||||
checkDollarStar p t@(T_NormalWord _ [T_DollarBraced id l])
|
||||
| bracedString l == "*" =
|
||||
checkDollarStar p t@(T_NormalWord _ [b@(T_DollarBraced id _)])
|
||||
| bracedString b == "*" =
|
||||
unless isAssigned $
|
||||
warn id 2048 "Use \"$@\" (with quotes) to prevent whitespace problems."
|
||||
where
|
||||
@@ -998,7 +896,7 @@ checkUnquotedDollarAt p word@(T_NormalWord _ parts) | not $ isStrictlyQuoteFree
|
||||
"Double quote array expansions to avoid re-splitting elements."
|
||||
where
|
||||
-- Fixme: should detect whether the alterantive is quoted
|
||||
isAlternative (T_DollarBraced _ t) = ":+" `isInfixOf` bracedString t
|
||||
isAlternative b@(T_DollarBraced _ t) = ":+" `isInfixOf` bracedString b
|
||||
isAlternative _ = False
|
||||
checkUnquotedDollarAt _ _ = return ()
|
||||
|
||||
@@ -1227,11 +1125,11 @@ checkNumberComparisons params (TC_Binary id typ op lhs rhs) = do
|
||||
op ++ " is for integer comparisons. Use " ++ seqv op ++ " instead."
|
||||
|
||||
isNum t =
|
||||
case deadSimple t of
|
||||
case oversimplify t of
|
||||
[v] -> all isDigit v
|
||||
_ -> False
|
||||
isFraction t =
|
||||
case deadSimple t of
|
||||
case oversimplify t of
|
||||
[v] -> isJust $ matchRegex floatRegex v
|
||||
_ -> False
|
||||
|
||||
@@ -1318,7 +1216,7 @@ prop_checkGlobbedRegex2a = verify checkGlobbedRegex "[[ $foo =~ \\#* ]]"
|
||||
prop_checkGlobbedRegex3 = verifyNot checkGlobbedRegex "[[ $foo =~ $foo ]]"
|
||||
prop_checkGlobbedRegex4 = verifyNot checkGlobbedRegex "[[ $foo =~ ^c.* ]]"
|
||||
checkGlobbedRegex _ (TC_Binary _ DoubleBracket "=~" _ rhs) =
|
||||
let s = concat $ deadSimple rhs in
|
||||
let s = concat $ oversimplify rhs in
|
||||
when (isConfusedGlobRegex s) $
|
||||
warn (getId rhs) 2049 "=~ is for regex. Use == for globs."
|
||||
checkGlobbedRegex _ _ = return ()
|
||||
@@ -1436,8 +1334,8 @@ prop_checkArithmeticDeref10= verifyNot checkArithmeticDeref "(( a[\\$foo] ))"
|
||||
prop_checkArithmeticDeref11= verifyNot checkArithmeticDeref "a[$foo]=wee"
|
||||
prop_checkArithmeticDeref12= verify checkArithmeticDeref "for ((i=0; $i < 3; i)); do true; done"
|
||||
prop_checkArithmeticDeref13= verifyNot checkArithmeticDeref "(( $$ ))"
|
||||
checkArithmeticDeref params t@(TA_Expansion _ [T_DollarBraced id l]) =
|
||||
unless (isException $ bracedString l) getWarning
|
||||
checkArithmeticDeref params t@(TA_Expansion _ [b@(T_DollarBraced id _)]) =
|
||||
unless (isException $ bracedString b) getWarning
|
||||
where
|
||||
isException [] = True
|
||||
isException s = any (`elem` "/.:#%?*@$") s || isDigit (head s)
|
||||
@@ -1634,52 +1532,6 @@ checkUnqualifiedCommand str f t@(T_SimpleCommand id _ (cmd:rest)) =
|
||||
when (t `isUnqualifiedCommand` str) $ f cmd rest
|
||||
checkUnqualifiedCommand _ _ _ = return ()
|
||||
|
||||
getLiteralString = getLiteralStringExt (const Nothing)
|
||||
|
||||
getGlobOrLiteralString = getLiteralStringExt f
|
||||
where
|
||||
f (T_Glob _ str) = return str
|
||||
f _ = Nothing
|
||||
|
||||
getLiteralStringExt more = g
|
||||
where
|
||||
allInList = liftM concat . mapM g
|
||||
g (T_DoubleQuoted _ l) = allInList l
|
||||
g (T_DollarDoubleQuoted _ l) = allInList l
|
||||
g (T_NormalWord _ l) = allInList l
|
||||
g (TA_Expansion _ l) = allInList l
|
||||
g (T_SingleQuoted _ s) = return s
|
||||
g (T_Literal _ s) = return s
|
||||
g x = more x
|
||||
|
||||
isLiteral t = isJust $ getLiteralString t
|
||||
|
||||
-- Get a literal string ignoring all non-literals
|
||||
onlyLiteralString :: Token -> String
|
||||
onlyLiteralString = fromJust . getLiteralStringExt (const $ return "")
|
||||
|
||||
-- Turn a NormalWord like foo="bar $baz" into a series of constituent elements like [foo=,bar ,$baz]
|
||||
getWordParts (T_NormalWord _ l) = concatMap getWordParts l
|
||||
getWordParts (T_DoubleQuoted _ l) = l
|
||||
getWordParts other = [other]
|
||||
|
||||
getUnquotedLiteral (T_NormalWord _ list) =
|
||||
liftM concat $ mapM str list
|
||||
where
|
||||
str (T_Literal _ s) = return s
|
||||
str _ = Nothing
|
||||
getUnquotedLiteral _ = Nothing
|
||||
|
||||
-- Return a list of NormalWords resulting from brace expansion
|
||||
braceExpand (T_NormalWord id list) = take 1000 $ do
|
||||
items <- mapM part list
|
||||
return $ T_NormalWord id items
|
||||
where
|
||||
part (T_BraceExpansion id items) = do
|
||||
item <- items
|
||||
braceExpand item
|
||||
part x = return x
|
||||
|
||||
isCommand token str = isCommandMatch token (\cmd -> cmd == str || ('/' : str) `isSuffixOf` cmd)
|
||||
isUnqualifiedCommand token str = isCommandMatch token (== str)
|
||||
|
||||
@@ -1687,22 +1539,6 @@ isCommandMatch token matcher = fromMaybe False $ do
|
||||
cmd <- getCommandName token
|
||||
return $ matcher cmd
|
||||
|
||||
getCommandName (T_Redirecting _ _ w) =
|
||||
getCommandName w
|
||||
getCommandName (T_SimpleCommand _ _ (w:_)) =
|
||||
getLiteralString w
|
||||
getCommandName (T_Annotation _ _ t) = getCommandName t
|
||||
getCommandName _ = Nothing
|
||||
|
||||
getCommandBasename = liftM basename . getCommandName
|
||||
basename = reverse . takeWhile (/= '/') . reverse
|
||||
|
||||
isAssignment (T_Annotation _ _ w) = isAssignment w
|
||||
isAssignment (T_Redirecting _ _ w) = isAssignment w
|
||||
isAssignment (T_SimpleCommand _ (w:_) []) = True
|
||||
isAssignment (T_Assignment {}) = True
|
||||
isAssignment _ = False
|
||||
|
||||
prop_checkPrintfVar1 = verify checkPrintfVar "printf \"Lol: $s\""
|
||||
prop_checkPrintfVar2 = verifyNot checkPrintfVar "printf 'Lol: $s'"
|
||||
prop_checkPrintfVar3 = verify checkPrintfVar "printf -v cow $(cmd)"
|
||||
@@ -1712,10 +1548,19 @@ checkPrintfVar _ = checkUnqualifiedCommand "printf" (const f) where
|
||||
f (format:params) = check format
|
||||
f _ = return ()
|
||||
check format =
|
||||
unless ('%' `elem` concat (deadSimple format) || isLiteral format) $
|
||||
unless ('%' `elem` concat (oversimplify format) || isLiteral format) $
|
||||
warn (getId format) 2059
|
||||
"Don't use variables in the printf format string. Use printf \"..%s..\" \"$foo\"."
|
||||
|
||||
|
||||
-- Check whether a word is entirely output from a single command
|
||||
tokenIsJustCommandOutput t = case t of
|
||||
T_NormalWord id [T_DollarExpansion _ _] -> True
|
||||
T_NormalWord id [T_DoubleQuoted _ [T_DollarExpansion _ _]] -> True
|
||||
T_NormalWord id [T_Backticked _ _] -> True
|
||||
T_NormalWord id [T_DoubleQuoted _ [T_Backticked _ _]] -> True
|
||||
_ -> False
|
||||
|
||||
prop_checkUuoeCmd1 = verify checkUuoeCmd "echo $(date)"
|
||||
prop_checkUuoeCmd2 = verify checkUuoeCmd "echo `date`"
|
||||
prop_checkUuoeCmd3 = verify checkUuoeCmd "echo \"$(date)\""
|
||||
@@ -1726,14 +1571,6 @@ checkUuoeCmd _ = checkUnqualifiedCommand "echo" (const f) where
|
||||
f [token] = when (tokenIsJustCommandOutput token) $ msg (getId token)
|
||||
f _ = return ()
|
||||
|
||||
-- Check whether a word is entirely output from a single command
|
||||
tokenIsJustCommandOutput t = case t of
|
||||
T_NormalWord id [T_DollarExpansion _ _] -> True
|
||||
T_NormalWord id [T_DoubleQuoted _ [T_DollarExpansion _ _]] -> True
|
||||
T_NormalWord id [T_Backticked _ _] -> True
|
||||
T_NormalWord id [T_DoubleQuoted _ [T_Backticked _ _]] -> True
|
||||
_ -> False
|
||||
|
||||
prop_checkUuoeVar1 = verify checkUuoeVar "for f in $(echo $tmp); do echo lol; done"
|
||||
prop_checkUuoeVar2 = verify checkUuoeVar "date +`echo \"$format\"`"
|
||||
prop_checkUuoeVar3 = verifyNot checkUuoeVar "foo \"$(echo -e '\r')\""
|
||||
@@ -1837,7 +1674,7 @@ checkGrepRe _ = checkCommand "grep" (const f) where
|
||||
f (re:_) = do
|
||||
when (isGlob re) $
|
||||
warn (getId re) 2062 "Quote the grep pattern so the shell won't interpret it."
|
||||
let string = concat $ deadSimple re
|
||||
let string = concat $ oversimplify re
|
||||
if isConfusedGlobRegex string then
|
||||
warn (getId re) 2063 "Grep uses regex, but this looks like a glob."
|
||||
else potentially $ do
|
||||
@@ -1871,7 +1708,7 @@ prop_checkTimeParameters1 = verify checkTimeParameters "time -f lol sleep 10"
|
||||
prop_checkTimeParameters2 = verifyNot checkTimeParameters "time sleep 10"
|
||||
prop_checkTimeParameters3 = verifyNot checkTimeParameters "time -p foo"
|
||||
checkTimeParameters _ = checkUnqualifiedCommand "time" f where
|
||||
f cmd (x:_) = let s = concat $ deadSimple x in
|
||||
f cmd (x:_) = let s = concat $ oversimplify x in
|
||||
when ("-" `isPrefixOf` s && s /= "-p") $
|
||||
info (getId cmd) 2023 "The shell may override 'time' as seen in man time(1). Use 'command time ..' for that one."
|
||||
f _ _ = return ()
|
||||
@@ -1907,7 +1744,7 @@ checkSudoRedirect _ (T_Redirecting _ redirs cmd) | cmd `isCommand` "sudo" =
|
||||
"sudo doesn't affect redirects. Use .. | sudo tee -a file"
|
||||
_ -> return ()
|
||||
warnAbout _ = return ()
|
||||
special file = concat (deadSimple file) == "/dev/null"
|
||||
special file = concat (oversimplify file) == "/dev/null"
|
||||
checkSudoRedirect _ _ = return ()
|
||||
|
||||
prop_checkReturn1 = verifyNot checkReturn "return"
|
||||
@@ -1952,7 +1789,7 @@ prop_checkPS18 = verifyNot checkPS1Assignments "PS1='\\[\\e\\]'"
|
||||
checkPS1Assignments _ (T_Assignment _ _ "PS1" _ word) = warnFor word
|
||||
where
|
||||
warnFor word =
|
||||
let contents = concat $ deadSimple word in
|
||||
let contents = concat $ oversimplify word in
|
||||
when (containsUnescaped contents) $
|
||||
info (getId word) 2025 "Make sure all escape sequences are enclosed in \\[..\\] to prevent line wrapping issues"
|
||||
containsUnescaped s =
|
||||
@@ -2120,7 +1957,7 @@ checkUnusedEchoEscapes _ = checkCommand "echo" (const f)
|
||||
where
|
||||
isDashE = mkRegex "^-.*e"
|
||||
hasEscapes = mkRegex "\\\\[rnt]"
|
||||
f args | concat (concatMap deadSimple allButLast) `matches` isDashE =
|
||||
f args | concat (concatMap oversimplify allButLast) `matches` isDashE =
|
||||
return ()
|
||||
where allButLast = reverse . drop 1 . reverse $ args
|
||||
f args = mapM_ checkEscapes args
|
||||
@@ -2164,7 +2001,7 @@ prop_checkSshCmdStr3 = verifyNot checkSshCommandString "ssh \"$host\""
|
||||
checkSshCommandString _ = checkCommand "ssh" (const f)
|
||||
where
|
||||
nonOptions =
|
||||
filter (\x -> not $ "-" `isPrefixOf` concat (deadSimple x))
|
||||
filter (\x -> not $ "-" `isPrefixOf` concat (oversimplify x))
|
||||
f args =
|
||||
case nonOptions args of
|
||||
(hostport:r@(_:_)) -> checkArg $ last r
|
||||
@@ -2370,7 +2207,7 @@ getModifiedVariableCommand base@(T_SimpleCommand _ _ (T_NormalWord _ (T_Literal
|
||||
if var == ""
|
||||
then []
|
||||
else [(base, token, var, DataString $ SourceFrom [stripEqualsFrom token])]
|
||||
where var = takeWhile isVariableChar $ dropWhile (`elem` "+-") $ concat $ deadSimple token
|
||||
where var = takeWhile isVariableChar $ dropWhile (`elem` "+-") $ concat $ oversimplify token
|
||||
|
||||
getSetParams (t:_:rest) | getLiteralString t == Just "-o" = getSetParams rest
|
||||
getSetParams (t:rest) =
|
||||
@@ -2431,7 +2268,7 @@ getIndexReferences s = fromMaybe [] $ do
|
||||
|
||||
getReferencedVariables t =
|
||||
case t of
|
||||
T_DollarBraced id l -> let str = bracedString l in
|
||||
T_DollarBraced id l -> let str = bracedString t in
|
||||
(t, t, getBracedReference str) :
|
||||
map (\x -> (l, l, x)) (getIndexReferences str)
|
||||
TA_Expansion id _ -> getIfReference t t
|
||||
@@ -2614,7 +2451,7 @@ checkSpacefulness params t =
|
||||
parents = parentMap params
|
||||
|
||||
isCounting (T_DollarBraced id token) =
|
||||
case concat $ deadSimple token of
|
||||
case concat $ oversimplify token of
|
||||
'#':_ -> True
|
||||
_ -> False
|
||||
isCounting _ = False
|
||||
@@ -2622,8 +2459,8 @@ checkSpacefulness params t =
|
||||
-- FIXME: doesn't handle ${a:+$var} vs ${a:+"$var"}
|
||||
isQuotedAlternative t =
|
||||
case t of
|
||||
T_DollarBraced _ l ->
|
||||
":+" `isInfixOf` bracedString l
|
||||
T_DollarBraced _ _ ->
|
||||
":+" `isInfixOf` bracedString t
|
||||
_ -> False
|
||||
|
||||
isSpacefulWord :: (String -> Bool) -> [Token] -> Bool
|
||||
@@ -2637,7 +2474,7 @@ checkSpacefulness params t =
|
||||
T_Extglob {} -> True
|
||||
T_Literal _ s -> s `containsAny` globspace
|
||||
T_SingleQuoted _ s -> s `containsAny` globspace
|
||||
T_DollarBraced _ l -> spacefulF $ getBracedReference $ bracedString l
|
||||
T_DollarBraced _ _ -> spacefulF $ getBracedReference $ bracedString x
|
||||
T_NormalWord _ w -> isSpacefulWord spacefulF w
|
||||
T_DoubleQuoted _ w -> isSpacefulWord spacefulF w
|
||||
_ -> False
|
||||
@@ -2676,13 +2513,13 @@ checkQuotesInLiterals params t =
|
||||
|
||||
forToken map (T_DollarBraced id t) =
|
||||
-- skip getBracedReference here to avoid false positives on PE
|
||||
Map.lookup (concat . deadSimple $ t) map
|
||||
Map.lookup (concat . oversimplify $ t) map
|
||||
forToken quoteMap (T_DoubleQuoted id tokens) =
|
||||
msum $ map (forToken quoteMap) tokens
|
||||
forToken quoteMap (T_NormalWord id tokens) =
|
||||
msum $ map (forToken quoteMap) tokens
|
||||
forToken _ t =
|
||||
if containsQuotes (concat $ deadSimple t)
|
||||
if containsQuotes (concat $ oversimplify t)
|
||||
then return $ getId t
|
||||
else Nothing
|
||||
|
||||
@@ -2734,7 +2571,7 @@ checkFunctionsUsedExternally params t =
|
||||
| t `isUnqualifiedCommand` "alias" = mapM_ getAlias args
|
||||
findFunctions _ = return ()
|
||||
getAlias arg =
|
||||
let string = concat $ deadSimple arg
|
||||
let string = concat $ oversimplify arg
|
||||
in when ('=' `elem` string) $
|
||||
modify ((takeWhile (/= '=') string, getId arg):)
|
||||
checkArg cmd arg = potentially $ do
|
||||
@@ -2871,13 +2708,13 @@ checkUnassignedReferences params t = warnings
|
||||
isInArray var t = any isArray $ getPath (parentMap params) t
|
||||
where
|
||||
isArray (T_Array {}) = True
|
||||
isArray (T_DollarBraced _ l) | var /= getBracedReference (bracedString l) = True
|
||||
isArray b@(T_DollarBraced _ _) | var /= getBracedReference (bracedString b) = True
|
||||
isArray _ = False
|
||||
|
||||
isGuarded (T_DollarBraced _ v) =
|
||||
any (`isPrefixOf` rest) ["-", ":-", "?", ":?"]
|
||||
where
|
||||
name = concat $ deadSimple v
|
||||
name = concat $ oversimplify v
|
||||
rest = dropWhile isVariableChar $ dropWhile (`elem` "#!") name
|
||||
isGuarded _ = False
|
||||
|
||||
@@ -2895,12 +2732,12 @@ checkGlobsAsOptions _ (T_SimpleCommand _ _ args) =
|
||||
where
|
||||
check v@(T_NormalWord _ (T_Glob id s:_)) | s == "*" || s == "?" =
|
||||
info id 2035 $
|
||||
"Use ./" ++ concat (deadSimple v)
|
||||
"Use ./" ++ concat (oversimplify v)
|
||||
++ " so names with dashes won't become options."
|
||||
check _ = return ()
|
||||
|
||||
isEndOfArgs t =
|
||||
case concat $ deadSimple t of
|
||||
case concat $ oversimplify t of
|
||||
"--" -> True
|
||||
":::" -> True
|
||||
"::::" -> True
|
||||
@@ -2924,7 +2761,7 @@ checkWhileReadPitfalls _ (T_WhileExpression id [command] contents)
|
||||
munchers = [ "ssh", "ffmpeg", "mplayer" ]
|
||||
|
||||
isStdinReadCommand (T_Pipeline _ _ [T_Redirecting id redirs cmd]) =
|
||||
let plaintext = deadSimple cmd
|
||||
let plaintext = oversimplify cmd
|
||||
in head (plaintext ++ [""]) == "read"
|
||||
&& ("-u" `notElem` plaintext)
|
||||
&& all (not . stdinRedirect) redirs
|
||||
@@ -2956,7 +2793,7 @@ prop_checkPrefixAssign2 = verifyNot checkPrefixAssignmentReference "var=$(echo $
|
||||
checkPrefixAssignmentReference params t@(T_DollarBraced id value) =
|
||||
check path
|
||||
where
|
||||
name = getBracedReference $ bracedString value
|
||||
name = getBracedReference $ bracedString t
|
||||
path = getPath (parentMap params) t
|
||||
idPath = map getId path
|
||||
|
||||
@@ -3013,7 +2850,7 @@ checkCdAndBack params = doLists
|
||||
doLists _ = return ()
|
||||
|
||||
isCdRevert t =
|
||||
case deadSimple t of
|
||||
case oversimplify t of
|
||||
["cd", p] -> p `elem` ["..", "-"]
|
||||
_ -> False
|
||||
|
||||
@@ -3093,7 +2930,7 @@ checkCatastrophicRm params t@(T_SimpleCommand id _ tokens) | t `isCommand` "rm"
|
||||
when (any isRecursiveFlag simpleArgs) $
|
||||
mapM_ (mapM_ checkWord . braceExpand) tokens
|
||||
where
|
||||
simpleArgs = deadSimple t
|
||||
simpleArgs = oversimplify t
|
||||
|
||||
checkWord token =
|
||||
case getLiteralString token of
|
||||
@@ -3277,7 +3114,7 @@ checkOverridingPath _ (T_SimpleCommand _ vars []) =
|
||||
mapM_ checkVar vars
|
||||
where
|
||||
checkVar (T_Assignment id Assign "PATH" Nothing word) =
|
||||
let string = concat $ deadSimple word
|
||||
let string = concat $ oversimplify word
|
||||
in unless (any (`isInfixOf` string) ["/bin", "/sbin" ]) $ do
|
||||
when ('/' `elem` string && ':' `notElem` string) $ notify id
|
||||
when (isLiteral word && ':' `notElem` string && '/' `notElem` string) $ notify id
|
||||
@@ -3324,16 +3161,6 @@ shellSupport t =
|
||||
forCase _ = ("", [])
|
||||
|
||||
|
||||
getCommandSequences (T_Script _ _ cmds) = [cmds]
|
||||
getCommandSequences (T_BraceGroup _ cmds) = [cmds]
|
||||
getCommandSequences (T_Subshell _ cmds) = [cmds]
|
||||
getCommandSequences (T_WhileExpression _ _ cmds) = [cmds]
|
||||
getCommandSequences (T_UntilExpression _ _ cmds) = [cmds]
|
||||
getCommandSequences (T_ForIn _ _ _ cmds) = [cmds]
|
||||
getCommandSequences (T_ForArithmetic _ _ _ _ cmds) = [cmds]
|
||||
getCommandSequences (T_IfExpression _ thens elses) = map snd thens ++ [elses]
|
||||
getCommandSequences _ = []
|
||||
|
||||
groupWith f = groupBy ((==) `on` f)
|
||||
|
||||
prop_checkMultipleAppends1 = verify checkMultipleAppends "foo >> file; bar >> file; baz >> file;"
|
||||
@@ -3365,7 +3192,7 @@ checkAliasesExpandEarly params =
|
||||
checkUnqualifiedCommand "alias" (const f)
|
||||
where
|
||||
f = mapM_ checkArg
|
||||
checkArg arg | '=' `elem` concat (deadSimple arg) =
|
||||
checkArg arg | '=' `elem` concat (oversimplify arg) =
|
||||
forM_ (take 1 $ filter (not . isLiteral) $ getWordParts arg) $
|
||||
\x -> warn (getId x) 2139 "This expands when defined, not when used. Consider escaping."
|
||||
checkArg _ = return ()
|
||||
@@ -3563,7 +3390,7 @@ checkUncheckedCd params root =
|
||||
&& not (isCondition $ getPath (parentMap params) t)) $
|
||||
warn (getId t) 2164 "Use cd ... || exit in case cd fails."
|
||||
checkElement _ = return ()
|
||||
isCdDotDot t = deadSimple t == ["cd", ".."]
|
||||
isCdDotDot t = oversimplify t == ["cd", ".."]
|
||||
hasSetE = isNothing $ doAnalysis (guard . not . isSetE) root
|
||||
isSetE t =
|
||||
case t of
|
||||
|
||||
Reference in New Issue
Block a user