lib/strings: Add sanitizeDerivationName function

This commit is contained in:
Silvan Mosberger 2020-01-27 23:03:38 +01:00
parent 5e46d5a7b5
commit 4b206ac83b
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GPG key ID: E8F1E9EAD284E17D
3 changed files with 76 additions and 2 deletions

View file

@ -4,7 +4,7 @@
let
inherit (builtins) head tail length;
inherit (lib.trivial) and;
inherit (lib.strings) concatStringsSep;
inherit (lib.strings) concatStringsSep sanitizeDerivationName;
inherit (lib.lists) fold concatMap concatLists;
in
@ -310,7 +310,7 @@ rec {
path' = builtins.storePath path;
res =
{ type = "derivation";
name = builtins.unsafeDiscardStringContext (builtins.substring 33 (-1) (baseNameOf path'));
name = sanitizeDerivationName (builtins.substring 33 (-1) (baseNameOf path'));
outPath = path';
outputs = [ "out" ];
out = res;

View file

@ -678,4 +678,36 @@ rec {
=> "1.0"
*/
fileContents = file: removeSuffix "\n" (builtins.readFile file);
/* Creates a valid derivation name from a potentially invalid one.
Type: sanitizeDerivationName :: String -> String
Example:
sanitizeDerivationName "../hello.bar # foo"
=> "-hello.bar-foo"
sanitizeDerivationName ""
=> "unknown"
sanitizeDerivationName pkgs.hello
=> "-nix-store-2g75chlbpxlrqn15zlby2dfh8hr9qwbk-hello-2.10"
*/
sanitizeDerivationName = string: lib.pipe string [
# Get rid of string context. This is safe under the assumption that the
# resulting string is only used as a derivation name
builtins.unsafeDiscardStringContext
# Strip all leading "."
(x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0)
# Split out all invalid characters
# https://github.com/NixOS/nix/blob/2.3.2/src/libstore/store-api.cc#L85-L112
# https://github.com/NixOS/nix/blob/2242be83c61788b9c0736a92bb0b5c7bbfc40803/nix-rust/src/store/path.rs#L100-L125
(builtins.split "[^[:alnum:]+._?=-]+")
# Replace invalid character ranges with a "-"
(concatMapStrings (s: if lib.isList s then "-" else s))
# Limit to 211 characters (minus 4 chars for ".drv")
(x: substring (lib.max (stringLength x - 207) 0) (-1) x)
# If the result is empty, replace it with "unknown"
(x: if stringLength x == 0 then "unknown" else x)
];
}

View file

@ -3,6 +3,23 @@
# if the resulting list is empty, all tests passed
with import ../default.nix;
let
testSanitizeDerivationName = { name, expected }:
let
drv = derivation {
name = strings.sanitizeDerivationName name;
builder = "x";
system = "x";
};
in {
# Evaluate the derivation so an invalid name would be caught
expr = builtins.seq drv.drvPath drv.name;
inherit expected;
};
in
runTests {
@ -478,4 +495,29 @@ runTests {
expected = "'-X' 'PUT' '--data' '{\"id\":0}' '--retry' '3' '--url' 'https://example.com/foo' '--url' 'https://example.com/bar' '--verbose'";
};
testSanitizeDerivationNameLeadingDots = testSanitizeDerivationName {
name = "..foo";
expected = "foo";
};
testSanitizeDerivationNameAscii = testSanitizeDerivationName {
name = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
expected = "-+--.-0123456789-=-?-ABCDEFGHIJKLMNOPQRSTUVWXYZ-_-abcdefghijklmnopqrstuvwxyz-";
};
testSanitizeDerivationNameTooLong = testSanitizeDerivationName {
name = "This string is loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong";
expected = "loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong";
};
testSanitizeDerivationNameTooLongWithInvalid = testSanitizeDerivationName {
name = "Hello there aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&&&&&&&";
expected = "there-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-";
};
testSanitizeDerivationNameEmpty = testSanitizeDerivationName {
name = "";
expected = "unknown";
};
}