feat(tvix/glue/fetchers): support file:// URLs r/7996

Nix supports file:// - URLs for `fetchurl` and `fetchTarball`.

Convert the enums and function arguments to hold a URL type.
reqwest::Url is a re-export of the url crate, but they don't re-export
the parsing errors, and as we want to hold these in our Error types, add
it to Cargo.toml explicitly.

The Fetcher::download function now checks on the scheme, and either
opens the file locally, or does do a HTTP request as before.

Fetch gets its custom debug impl, removing potentially sensitive
username and password out of URLs.

Change-Id: I777db1fe487370e822cbfec4624034aca5e08045
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11504
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI

1 files changed, 3 insertions, 2 deletions

diff --git a/tvix/glue/src/known_paths.rs b/tvix/glue/src/known_paths.rs
index 873efdcf8a06..c95065592bcf 100644
--- a/tvix/glue/src/known_paths.rs
+++ b/tvix/glue/src/known_paths.rs
@@ -134,6 +134,7 @@ impl KnownPaths {
 #[cfg(test)]
 mod tests {
     use nix_compat::{derivation::Derivation, nixbase32, nixhash::NixHash, store_path::StorePath};
+    use url::Url;
 
     use crate::fetchers::Fetch;
 
@@ -160,13 +161,13 @@ mod tests {
             StorePath::from_bytes(b"fhaj6gmwns62s6ypkcldbaj2ybvkhx3p-foo").expect("must parse");
 
         static ref FETCH_URL : Fetch = Fetch::URL(
-            "https://raw.githubusercontent.com/aaptel/notmuch-extract-patch/f732a53e12a7c91a06755ebfab2007adc9b3063b/notmuch-extract-patch".into(),
+            Url::parse("https://raw.githubusercontent.com/aaptel/notmuch-extract-patch/f732a53e12a7c91a06755ebfab2007adc9b3063b/notmuch-extract-patch").unwrap(),
             Some(NixHash::Sha256(nixbase32::decode_fixed("0nawkl04sj7psw6ikzay7kydj3dhd0fkwghcsf5rzaw4bmp4kbax").unwrap()))
         );
         static ref FETCH_URL_OUT_PATH: StorePath = StorePath::from_bytes(b"06qi00hylriyfm0nl827crgjvbax84mz-notmuch-extract-patch").unwrap();
 
         static ref FETCH_TARBALL : Fetch = Fetch::Tarball(
-            "https://github.com/NixOS/nixpkgs/archive/91050ea1e57e50388fa87a3302ba12d188ef723a.tar.gz".into(),
+            Url::parse("https://github.com/NixOS/nixpkgs/archive/91050ea1e57e50388fa87a3302ba12d188ef723a.tar.gz").unwrap(),
             Some(nixbase32::decode_fixed("1hf6cgaci1n186kkkjq106ryf8mmlq9vnwgfwh625wa8hfgdn4dm").unwrap())
         );
         static ref FETCH_TARBALL_OUT_PATH: StorePath = StorePath::from_bytes(b"7adgvk5zdfq4pwrhsm3n9lzypb12gw0g-source").unwrap();