Use parsed URLs for conflicting URL error message (#14380)

## Summary

There's a good example of the downside of using verbatim URLs here:
https://github.com/astral-sh/uv/pull/14197#discussion_r2163599625 (we
show two relative paths that point to the same directory, but it's not
clear from the error message).

The diff:

```
    2     2 │ ----- stdout -----
    3     3 │
    4     4 │ ----- stderr -----
    5     5 │ error: Requirements contain conflicting URLs for package `library` in all marker environments:
    6       │-- ../../library
    7       │-- ./library
          6 │+- file://[TEMP_DIR]/library
          7 │+- file://[TEMP_DIR]/library (editable)
```

crates/uv-resolver/src/error.rs

@@ -17,6 +17,8 @@ use uv_normalize::{ExtraName, InvalidNameError, PackageName};
 use uv_pep440::{LocalVersionSlice, LowerBound, Version, VersionSpecifier};
 use uv_pep508::{MarkerEnvironment, MarkerExpression, MarkerTree, MarkerValueVersion};
 use uv_platform_tags::Tags;
+use uv_pypi_types::ParsedUrl;
+use uv_redacted::DisplaySafeUrl;
 use uv_static::EnvVars;
 
 use crate::candidate_selector::CandidateSelector;
@@ -56,11 +58,14 @@ pub enum ResolveError {
         } else {
             format!(" in {env}")
         },
-        urls.join("\n- "),
+        urls.iter()
+            .map(|url| format!("{}{}", DisplaySafeUrl::from(url.clone()), if url.is_editable() { " (editable)" } else { "" }))
+            .collect::<Vec<_>>()
+            .join("\n- ")
     )]
     ConflictingUrls {
         package_name: PackageName,
-        urls: Vec<String>,
+        urls: Vec<ParsedUrl>,
         env: ResolverEnvironment,
     },
 
@@ -71,11 +76,14 @@ pub enum ResolveError {
         } else {
             format!(" in {env}")
         },
-        indexes.join("\n- "),
+        indexes.iter()
+            .map(std::string::ToString::to_string)
+            .collect::<Vec<_>>()
+            .join("\n- ")
     )]
     ConflictingIndexesForEnvironment {
         package_name: PackageName,
-        indexes: Vec<String>,
+        indexes: Vec<IndexUrl>,
         env: ResolverEnvironment,
     },
 

crates/uv-resolver/src/fork_indexes.rs

@@ -24,7 +24,7 @@ impl ForkIndexes {
     ) -> Result<(), ResolveError> {
         if let Some(previous) = self.0.insert(package_name.clone(), index.clone()) {
             if &previous != index {
-                let mut conflicts = vec![previous.url.to_string(), index.url.to_string()];
+                let mut conflicts = vec![previous.url, index.url.clone()];
                 conflicts.sort();
                 return Err(ResolveError::ConflictingIndexesForEnvironment {
                     package_name: package_name.clone(),

crates/uv-resolver/src/fork_urls.rs

@@ -2,7 +2,6 @@ use std::collections::hash_map::Entry;
 
 use rustc_hash::FxHashMap;
 
-use uv_distribution_types::Verbatim;
 use uv_normalize::PackageName;
 use uv_pypi_types::VerbatimParsedUrl;
 
@@ -34,10 +33,8 @@ impl ForkUrls {
         match self.0.entry(package_name.clone()) {
             Entry::Occupied(previous) => {
                 if previous.get() != url {
-                    let mut conflicting_url = vec![
-                        previous.get().verbatim.verbatim().to_string(),
-                        url.verbatim.verbatim().to_string(),
-                    ];
+                    let mut conflicting_url =
+                        vec![previous.get().parsed_url.clone(), url.parsed_url.clone()];
                     conflicting_url.sort();
                     return Err(ResolveError::ConflictingUrls {
                         package_name: package_name.clone(),

crates/uv-resolver/src/resolver/urls.rs

@@ -4,7 +4,6 @@ use same_file::is_same_file;
 use tracing::debug;
 
 use uv_cache_key::CanonicalUrl;
-use uv_distribution_types::Verbatim;
 use uv_git::GitResolver;
 use uv_normalize::PackageName;
 use uv_pep508::{MarkerTree, VerbatimUrl};
@@ -170,8 +169,8 @@ impl Urls {
         let [allowed_url] = matching_urls.as_slice() else {
             let mut conflicting_urls: Vec<_> = matching_urls
                 .into_iter()
-                .map(|parsed_url| parsed_url.verbatim.verbatim().to_string())
-                .chain(std::iter::once(verbatim_url.verbatim().to_string()))
+                .map(|parsed_url| parsed_url.parsed_url.clone())
+                .chain(std::iter::once(parsed_url.clone()))
                 .collect();
             conflicting_urls.sort();
             return Err(ResolveError::ConflictingUrls {

crates/uv/tests/it/pip_compile.rs

@@ -2909,16 +2909,16 @@ fn incompatible_narrowed_url_dependency() -> Result<()> {
     "})?;
 
     uv_snapshot!(context.filters(), context.pip_compile()
-            .arg("requirements.in"), @r###"
+            .arg("requirements.in"), @r"
     success: false
     exit_code: 2
     ----- stdout -----
 
     ----- stderr -----
     error: Requirements contain conflicting URLs for package `uv-public-pypackage`:
-    - git+https://github.com/astral-test/uv-public-pypackage@b270df1a2fb5d012294e9aaf05e7e0bab1e6a389
     - git+https://github.com/astral-test/uv-public-pypackage@test-branch
-    "###
+    - git+https://github.com/astral-test/uv-public-pypackage@b270df1a2fb5d012294e9aaf05e7e0bab1e6a389
+    "
     );
 
     Ok(())

crates/uv/tests/it/pip_install.rs

@@ -1515,16 +1515,16 @@ fn install_editable_incompatible_constraint_url() -> Result<()> {
         .arg("-e")
         .arg(context.workspace_root.join("scripts/packages/black_editable"))
         .arg("--constraint")
-        .arg("constraints.txt"), @r###"
+        .arg("constraints.txt"), @r"
     success: false
     exit_code: 2
     ----- stdout -----
 
     ----- stderr -----
     error: Requirements contain conflicting URLs for package `black`:
-    - [WORKSPACE]/scripts/packages/black_editable
+    - file://[WORKSPACE]/scripts/packages/black_editable (editable)
     - https://files.pythonhosted.org/packages/0f/89/294c9a6b6c75a08da55e9d05321d0707e9418735e3062b12ef0f54c33474/black-24.4.2-py3-none-any.whl
-    "###
+    "
     );
 
     Ok(())