Remove lossy resolution-to-requirements conversion in install plan (#…

…7798)

## Summary

This is a longstanding piece of technical debt. After we resolve, we
have a bunch of `ResolvedDist` entries. We then convert those to
`Requirement` (which is lossy -- we lose information like "the index
that the package was resolved to"), and then back to `Dist`.

crates/distribution-types/src/resolved.rs

@@ -195,14 +195,8 @@ impl From<Dist> for ResolvedDist {
     }
 }
 
-impl From<InstalledDist> for ResolvedDist {
-    fn from(value: InstalledDist) -> Self {
-        ResolvedDist::Installed(value)
-    }
-}
-
 impl Display for ResolvedDist {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::Installed(dist) => dist.fmt(f),
             Self::Installable(dist) => dist.fmt(f),

crates/uv-dispatch/src/lib.rs

@@ -213,19 +213,16 @@ impl<'a> BuildContext for BuildDispatch<'a> {
 
         // Determine the current environment markers.
         let tags = self.interpreter.tags()?;
-        let markers = self.interpreter.resolver_markers();
 
         // Determine the set of installed packages.
         let site_packages = SitePackages::from_environment(venv)?;
 
-        let requirements = resolution.requirements().collect::<Vec<_>>();
-
         let Plan {
             cached,
             remote,
             reinstalls,
             extraneous: _,
-        } = Planner::new(&requirements).build(
+        } = Planner::new(resolution).build(
             site_packages,
             &Reinstall::default(),
             &BuildOptions::default(),
@@ -234,7 +231,6 @@ impl<'a> BuildContext for BuildDispatch<'a> {
             self.config_settings,
             self.cache(),
             venv,
-            &markers,
             tags,
         )?;
 
@@ -244,17 +240,6 @@ impl<'a> BuildContext for BuildDispatch<'a> {
             return Ok(vec![]);
         }
 
-        // Resolve any registry-based requirements.
-        let remote = remote
-            .iter()
-            .map(|dist| {
-                resolution
-                    .get_remote(&dist.name)
-                    .cloned()
-                    .expect("Resolution should contain all packages")
-            })
-            .collect::<Vec<_>>();
-
         // Download any missing distributions.
         let wheels = if remote.is_empty() {
             vec![]

crates/uv-installer/Cargo.toml

@@ -14,7 +14,6 @@ workspace = true
 
 [dependencies]
 cache-key = { workspace = true }
-distribution-filename = { workspace = true }
 distribution-types = { workspace = true }
 install-wheel-rs = { workspace = true, default-features = false }
 pep440_rs = { workspace = true }
@@ -27,7 +26,6 @@ uv-configuration = { workspace = true }
 uv-distribution = { workspace = true }
 uv-extract = { workspace = true }
 uv-fs = { workspace = true }
-uv-git = { workspace = true }
 uv-python = { workspace = true }
 uv-normalize = { workspace = true }
 uv-types = { workspace = true }