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| -rw-r--r-- | lib/strings.nix | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index 7ecd6b143ee8..74e3eaa0722d 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -315,6 +315,21 @@ rec { */ 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. replaceChars = builtins.replaceStrings or ( del: new: s: |