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35 lines
1.2 KiB
Idris
35 lines
1.2 KiB
Idris
module System.Escape
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import Data.List
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import System.Info
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||| Escape special characters in an Idris string, for use as a string literal
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||| in the shell
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public export
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escapeArg : String -> String
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escapeArg cmd = let escapedCmdChars = pack $ unpack cmd >>= escapeArgChar in
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if isWindows
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then escapedCmdChars
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else "\"" ++ escapedCmdChars ++ "\""
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where
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escapeArgChar : Char -> List Char
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escapeArgChar c =
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if isWindows
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then if c == '%' || c == '^' || c == '&' || c == '<' || c == '>' || c == '|' ||
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c == '\'' || c == '"' || c == '`' ||
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c == ' ' || c == '\t' || c == '\n' || c == ';' || c == ',' || c == '=' || c == '\x0B' || c == '\x0C' || c == '\xFF' ||
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c == '(' || c == ')' || c == '!'
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then ['^', c]
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else [c]
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else if c == '$' || c == '`' || c == '\\' || c == '"'
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then ['\\', c]
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else [c]
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||| Escape special characters in a list of shell arguments, as a single command
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||| for the shell.
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||| eg. the list ["a", "b", "c d"] is interpreted as the command `a b "c d"`
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public export
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escapeCmd : List String -> String
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escapeCmd cmd = concat $ intersperse " " $ map escapeArg cmd
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