Avoid unwrap when serializing receipts (#5678)

crates/uv-tool/src/lib.rs

@@ -52,6 +52,8 @@ pub enum Error {
     EnvironmentRead(PathBuf, String),
     #[error("Failed find tool package `{0}` at `{1}`")]
     MissingToolPackage(PackageName, PathBuf),
+    #[error(transparent)]
+    Serialization(#[from] toml_edit::ser::Error),
 }
 
 /// A collection of uv-managed tools installed on the current system.
@@ -159,7 +161,7 @@ impl InstalledTools {
             path.user_display()
         );
 
-        let doc = tool_receipt.to_toml();
+        let doc = tool_receipt.to_toml()?;
 
         // Save the modified `uv-receipt.toml`.
         fs_err::write(&path, doc)?;

crates/uv-tool/src/receipt.rs

@@ -32,13 +32,13 @@ impl ToolReceipt {
     }
 
     /// Returns the TOML representation of this receipt.
-    pub(crate) fn to_toml(&self) -> String {
+    pub(crate) fn to_toml(&self) -> Result<String, toml_edit::ser::Error> {
         // We construct a TOML document manually instead of going through Serde to enable
         // the use of inline tables.
         let mut doc = toml_edit::DocumentMut::new();
-        doc.insert("tool", toml_edit::Item::Table(self.tool.to_toml()));
+        doc.insert("tool", toml_edit::Item::Table(self.tool.to_toml()?));
 
-        doc.to_string()
+        Ok(doc.to_string())
     }
 }
 

crates/uv-tool/src/tool.rs

@@ -73,26 +73,25 @@ impl Tool {
     }
 
     /// Returns the TOML table for this tool.
-    pub(crate) fn to_toml(&self) -> Table {
+    pub(crate) fn to_toml(&self) -> Result<Table, toml_edit::ser::Error> {
         let mut table = Table::new();
 
         table.insert("requirements", {
-            let requirements = match self.requirements.as_slice() {
+            let requirements = self
+                .requirements
+                .iter()
+                .map(|requirement| {
+                    serde::Serialize::serialize(
+                        &requirement,
+                        toml_edit::ser::ValueSerializer::new(),
+                    )
+                })
+                .collect::<Result<Vec<_>, _>>()?;
+
+            let requirements = match requirements.as_slice() {
                 [] => Array::new(),
-                [requirement] => Array::from_iter([serde::Serialize::serialize(
-                    &requirement,
-                    toml_edit::ser::ValueSerializer::new(),
-                )
-                .unwrap()]),
-                requirements => {
-                    each_element_on_its_line_array(requirements.iter().map(|requirement| {
-                        serde::Serialize::serialize(
-                            &requirement,
-                            toml_edit::ser::ValueSerializer::new(),
-                        )
-                        .unwrap()
-                    }))
-                }
+                [requirement] => Array::from_iter([requirement]),
+                requirements => each_element_on_its_line_array(requirements.iter()),
             };
             value(requirements)
         });
@@ -111,7 +110,7 @@ impl Tool {
             value(entrypoints)
         });
 
-        table
+        Ok(table)
     }
 
     pub fn entrypoints(&self) -> &[ToolEntrypoint] {

crates/uv/tests/tool_install.rs

@@ -144,7 +144,6 @@ fn tool_install() {
             sys.argv[0] = re.sub(r"(-script\.pyw|\.exe)?$", "", sys.argv[0])
             sys.exit(main())
         "###);
-
     });
 
     uv_snapshot!(context.filters(), Command::new("flask").arg("--version").env("PATH", bin_dir.as_os_str()), @r###"
@@ -161,7 +160,6 @@ fn tool_install() {
     insta::with_settings!({
         filters => context.filters(),
     }, {
-        // We should have a new tool receipt
         assert_snapshot!(fs_err::read_to_string(tool_dir.join("flask").join("uv-receipt.toml")).unwrap(), @r###"
         [tool]
         requirements = [{ name = "flask" }]