Improve error messages

crates/puffin-cli/tests/snapshots/pip_compile__compile_unsolvable_requirements_direct_mixed_ranges.snap

@@ -1,19 +0,0 @@
----
-source: crates/puffin-cli/tests/pip_compile.rs
-info:
-  program: puffin
-  args:
-    - pip-compile
-    - pyproject.toml
-    - "--cache-dir"
-    - /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpHT5k4n
-  env:
-    VIRTUAL_ENV: /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpS0cCaw/.venv
----
-success: false
-exit_code: 2
------ stdout -----
-
------ stderr -----
-error: Conflicting versions for package `django`: ==3.0 is incompatible with >5.0
-

crates/puffin-cli/tests/snapshots/pip_compile__compile_unsolvable_requirements_direct_pinned.snap

@@ -1,19 +0,0 @@
----
-source: crates/puffin-cli/tests/pip_compile.rs
-info:
-  program: puffin
-  args:
-    - pip-compile
-    - pyproject.toml
-    - "--cache-dir"
-    - /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpgsozkO
-  env:
-    VIRTUAL_ENV: /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpwjg05J/.venv
----
-success: false
-exit_code: 2
------ stdout -----
-
------ stderr -----
-error: Conflicting versions for package `django`: ==5.0b1 is incompatible with ==5.0a1
-

crates/puffin-cli/tests/snapshots/pip_compile__compile_unsolvable_requirements_direct_ranges.snap

@@ -6,14 +6,14 @@ info:
     - pip-compile
     - pyproject.toml
     - "--cache-dir"
-    - /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpQZyk8c
+    - /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpAFfkaN
   env:
-    VIRTUAL_ENV: /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpOV0S3e/.venv
+    VIRTUAL_ENV: /var/folders/bc/qlsk3t6x7c9fhhbvvcg68k9c0000gp/T/.tmpOGc5nS/.venv
 ---
 success: false
 exit_code: 2
 ----- stdout -----
 
 ----- stderr -----
-error: Conflicting versions for package `django`: >=4.0 is incompatible with <=3.0
+error: Conflicting versions requested for package `django`: `>=4.0` is incompatible with `<=3.0`
 

crates/puffin-resolver/src/error.rs

@@ -39,7 +39,7 @@ pub enum ResolveError {
     #[error("Conflicting URLs for package `{0}`: {1} and {2}")]
     ConflictingUrls(PackageName, String, String),
 
-    #[error("Conflicting versions for package `{0}`: {1} is incompatible with {2}")]
+    #[error("Conflicting versions requested for package `{0}`: `{1}` is incompatible with `{2}`")]
     ConflictingPackageVersions(PackageName, Range<PubGrubVersion>, Range<PubGrubVersion>),
 
     #[error("Package `{0}` attempted to resolve via URL: {1}. URL dependencies must be expressed as direct requirements or constraints. Consider adding `{0} @ {1}` to your dependencies or constraints file.")]