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lib/strings: Introduce escapeNixIdentifier

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This commit is contained in:
Silvan Mosberger 2020-03-14 17:53:47 +01:00
parent f9e94b9ffe
commit f9eb3d158a
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15
lib/strings.nix
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@ -315,6 +315,21 @@ rec {
*/ */
escapeNixString = s: escape ["$"] (builtins.toJSON s); escapeNixString = s: escape ["$"] (builtins.toJSON s);
/* Quotes a string if it can't be used as an identifier directly.
Type: string -> string
Example:
escapeNixIdentifier "hello"
=> "hello"
escapeNixIdentifier "0abc"
=> "\"0abc\""
*/
escapeNixIdentifier = s:
# Regex from https://github.com/NixOS/nix/blob/d048577909e383439c2549e849c5c2f2016c997e/src/libexpr/lexer.l#L91
if builtins.match "[a-zA-Z_][a-zA-Z0-9_'-]*" s != null
then s else escapeNixString s;
# Obsolete - use replaceStrings instead. # Obsolete - use replaceStrings instead.
replaceChars = builtins.replaceStrings or ( replaceChars = builtins.replaceStrings or (
del: new: s: del: new: s: