refactor(util-schemas): error type for restricted_names

crates/cargo-util-schemas/src/manifest.rs

@@ -10,7 +10,6 @@ use std::fmt::{self, Display, Write};
 use std::path::PathBuf;
 use std::str;
 
-use anyhow::Result;
 use serde::de::{self, IntoDeserializer as _, Unexpected};
 use serde::ser;
 use serde::{Deserialize, Serialize};
@@ -21,6 +20,8 @@ use crate::core::PartialVersion;
 use crate::core::PartialVersionError;
 use crate::restricted_names;
 
+pub use crate::restricted_names::NameValidationError;
+
 /// This type is used to deserialize `Cargo.toml` files.
 #[derive(Debug, Deserialize, Serialize)]
 #[serde(rename_all = "kebab-case")]
@@ -1145,7 +1146,7 @@ macro_rules! str_newtype {
         }
 
         impl<'a> std::str::FromStr for $name<String> {
-            type Err = anyhow::Error;
+            type Err = restricted_names::NameValidationError;
 
             fn from_str(value: &str) -> Result<Self, Self::Err> {
                 Self::new(value.to_owned())
@@ -1174,7 +1175,7 @@ str_newtype!(PackageName);
 
 impl<T: AsRef<str>> PackageName<T> {
     /// Validated package name
-    pub fn new(name: T) -> Result<Self> {
+    pub fn new(name: T) -> Result<Self, NameValidationError> {
         restricted_names::validate_package_name(name.as_ref(), "package name", "")?;
         Ok(Self(name))
     }
@@ -1196,7 +1197,7 @@ str_newtype!(RegistryName);
 
 impl<T: AsRef<str>> RegistryName<T> {
     /// Validated registry name
-    pub fn new(name: T) -> Result<Self> {
+    pub fn new(name: T) -> Result<Self, NameValidationError> {
         restricted_names::validate_package_name(name.as_ref(), "registry name", "")?;
         Ok(Self(name))
     }
@@ -1206,7 +1207,7 @@ str_newtype!(ProfileName);
 
 impl<T: AsRef<str>> ProfileName<T> {
     /// Validated profile name
-    pub fn new(name: T) -> Result<Self> {
+    pub fn new(name: T) -> Result<Self, NameValidationError> {
         restricted_names::validate_profile_name(name.as_ref())?;
         Ok(Self(name))
     }
@@ -1216,7 +1217,7 @@ str_newtype!(FeatureName);
 
 impl<T: AsRef<str>> FeatureName<T> {
     /// Validated feature name
-    pub fn new(name: T) -> Result<Self> {
+    pub fn new(name: T) -> Result<Self, NameValidationError> {
         restricted_names::validate_feature_name(name.as_ref())?;
         Ok(Self(name))
     }

crates/cargo-util-schemas/src/restricted_names.rs

@@ -1,7 +1,32 @@
 //! Helpers for validating and checking names like package and crate names.
 
-use anyhow::bail;
-use anyhow::Result;
+type Result<T> = std::result::Result<T, NameValidationError>;
+
+/// Error validating names in Cargo.
+#[non_exhaustive]
+#[derive(Debug, thiserror::Error)]
+pub enum NameValidationError {
+    #[error("{0} cannot be empty")]
+    Empty(&'static str),
+
+    #[error("invalid character `{ch}` in {what}: `{name}`, {reason}")]
+    InvalidCharacter {
+        ch: char,
+        what: &'static str,
+        name: String,
+        reason: &'static str,
+    },
+
+    #[error(
+        "profile name `{name}` is reserved\n{help}\n\
+         See https://doc.rust-lang.org/cargo/reference/profiles.html \
+         for more on configuring profiles."
+    )]
+    ProfileNameReservedKeyword { name: String, help: &'static str },
+
+    #[error("feature named `{0}` is not allowed to start with `dep:`")]
+    FeatureNameStartsWithDepColon(String),
+}
 
 /// Check the base requirements for a package name.
 ///
@@ -9,46 +34,41 @@ use anyhow::Result;
 /// level of sanity. Note that package names have other restrictions
 /// elsewhere. `cargo new` has a few restrictions, such as checking for
 /// reserved names. crates.io has even more restrictions.
-pub fn validate_package_name(name: &str, what: &str, help: &str) -> Result<()> {
+pub fn validate_package_name(name: &str, what: &'static str, help: &str) -> Result<()> {
     if name.is_empty() {
-        bail!("{what} cannot be empty");
+        return Err(NameValidationError::Empty(what));
     }
 
     let mut chars = name.chars();
     if let Some(ch) = chars.next() {
         if ch.is_digit(10) {
             // A specific error for a potentially common case.
-            bail!(
-                "the name `{}` cannot be used as a {}, \
-                the name cannot start with a digit{}",
-                name,
-                what,
-                help
-            );
-        }
-        if !(unicode_xid::UnicodeXID::is_xid_start(ch) || ch == '_') {
-            bail!(
-                "invalid character `{}` in {}: `{}`, \
-                the first character must be a Unicode XID start character \
-                (most letters or `_`){}",
+            return Err(NameValidationError::InvalidCharacter {
                 ch,
                 what,
-                name,
-                help
-            );
+                name: name.into(),
+                reason: "the name cannot start with a digit",
+            });
+        }
+        if !(unicode_xid::UnicodeXID::is_xid_start(ch) || ch == '_') {
+            return Err(NameValidationError::InvalidCharacter {
+                ch,
+                what,
+                name: name.into(),
+                reason: "the first character must be a Unicode XID start character \
+                 (most letters or `_`)",
+            });
         }
     }
     for ch in chars {
         if !(unicode_xid::UnicodeXID::is_xid_continue(ch) || ch == '-') {
-            bail!(
-                "invalid character `{}` in {}: `{}`, \
-                characters must be Unicode XID characters \
-                (numbers, `-`, `_`, or most letters){}",
+            return Err(NameValidationError::InvalidCharacter {
                 ch,
                 what,
-                name,
-                help
-            );
+                name: name.into(),
+                reason: "characters must be Unicode XID characters \
+                 (numbers, `-`, `_`, or most letters)",
+            });
         }
     }
     Ok(())
@@ -83,37 +103,28 @@ pub fn validate_profile_name(name: &str) -> Result<()> {
         .chars()
         .find(|ch| !ch.is_alphanumeric() && *ch != '_' && *ch != '-')
     {
-        bail!(
-            "invalid character `{}` in profile name `{}`\n\
-                Allowed characters are letters, numbers, underscore, and hyphen.",
+        return Err(NameValidationError::InvalidCharacter {
             ch,
-            name
-        );
+            what: "profile name",
+            name: name.into(),
+            reason: "allowed characters are letters, numbers, underscore, and hyphen",
+        });
     }
 
-    const SEE_DOCS: &str = "See https://doc.rust-lang.org/cargo/reference/profiles.html \
-            for more on configuring profiles.";
-
     let lower_name = name.to_lowercase();
     if lower_name == "debug" {
-        bail!(
-            "profile name `{}` is reserved\n\
-                 To configure the default development profile, use the name `dev` \
-                 as in [profile.dev]\n\
-                {}",
-            name,
-            SEE_DOCS
-        );
+        return Err(NameValidationError::ProfileNameReservedKeyword {
+            name: name.into(),
+            help: "To configure the default development profile, \
+                use the name `dev` as in [profile.dev]",
+        });
     }
     if lower_name == "build-override" {
-        bail!(
-            "profile name `{}` is reserved\n\
-                 To configure build dependency settings, use [profile.dev.build-override] \
-                 and [profile.release.build-override]\n\
-                 {}",
-            name,
-            SEE_DOCS
-        );
+        return Err(NameValidationError::ProfileNameReservedKeyword {
+            name: name.into(),
+            help: "To configure build dependency settings, use [profile.dev.build-override] \
+                 and [profile.release.build-override]",
+        });
     }
 
     // These are some arbitrary reservations. We have no plans to use
@@ -144,46 +155,55 @@ pub fn validate_profile_name(name: &str) -> Result<()> {
             | "uninstall"
     ) || lower_name.starts_with("cargo")
     {
-        bail!(
-            "profile name `{}` is reserved\n\
-                 Please choose a different name.\n\
-                 {}",
-            name,
-            SEE_DOCS
-        );
+        return Err(NameValidationError::ProfileNameReservedKeyword {
+            name: name.into(),
+            help: "Please choose a different name.",
+        });
     }
 
     Ok(())
 }
 
 pub fn validate_feature_name(name: &str) -> Result<()> {
+    let what = "feature name";
     if name.is_empty() {
-        bail!("feature name cannot be empty");
+        return Err(NameValidationError::Empty(what));
     }
 
     if name.starts_with("dep:") {
-        bail!("feature named `{name}` is not allowed to start with `dep:`",);
+        return Err(NameValidationError::FeatureNameStartsWithDepColon(
+            name.into(),
+        ));
     }
     if name.contains('/') {
-        bail!("feature named `{name}` is not allowed to contain slashes",);
+        return Err(NameValidationError::InvalidCharacter {
+            ch: '/',
+            what,
+            name: name.into(),
+            reason: "feature name is not allowed to contain slashes",
+        });
     }
     let mut chars = name.chars();
     if let Some(ch) = chars.next() {
         if !(unicode_xid::UnicodeXID::is_xid_start(ch) || ch == '_' || ch.is_digit(10)) {
-            bail!(
-                "invalid character `{ch}` in feature `{name}`, \
-                the first character must be a Unicode XID start character or digit \
-                (most letters or `_` or `0` to `9`)",
-            );
+            return Err(NameValidationError::InvalidCharacter {
+                ch,
+                what,
+                name: name.into(),
+                reason: "the first character must be a Unicode XID start character or digit \
+                 (most letters or `_` or `0` to `9`)",
+            });
         }
     }
     for ch in chars {
         if !(unicode_xid::UnicodeXID::is_xid_continue(ch) || ch == '-' || ch == '+' || ch == '.') {
-            bail!(
-                "invalid character `{ch}` in feature `{name}`, \
-                characters must be Unicode XID characters, '-', `+`, or `.` \
-                (numbers, `+`, `-`, `_`, `.`, or most letters)",
-            );
+            return Err(NameValidationError::InvalidCharacter {
+                ch,
+                what,
+                name: name.into(),
+                reason: "characters must be Unicode XID characters, '-', `+`, or `.` \
+                 (numbers, `+`, `-`, `_`, `.`, or most letters)",
+            });
         }
     }
     Ok(())

tests/testsuite/features.rs

@@ -2063,7 +2063,7 @@ Caused by:
     |
   8 |                 \"+foo\" = []
     |                 ^^^^^^
-  invalid character `+` in feature `+foo`, \
+  invalid character `+` in feature name: `+foo`, \
   the first character must be a Unicode XID start character or digit \
   (most letters or `_` or `0` to `9`)
 ",
@@ -2094,7 +2094,7 @@ Caused by:
     |
   8 |             \"a&b\" = []
     |             ^^^^^
-  invalid character `&` in feature `a&b`, \
+  invalid character `&` in feature name: `a&b`, \
   characters must be Unicode XID characters, '-', `+`, or `.` \
   (numbers, `+`, `-`, `_`, `.`, or most letters)
 ",
@@ -2131,7 +2131,7 @@ Caused by:
     |
   7 |                 \"foo/bar\" = []
     |                 ^^^^^^^^^
-  feature named `foo/bar` is not allowed to contain slashes
+  invalid character `/` in feature name: `foo/bar`, feature name is not allowed to contain slashes
 ",
         )
         .run();

tests/testsuite/new.rs

@@ -348,8 +348,7 @@ fn explicit_invalid_name_not_suggested() {
         .with_status(101)
         .with_stderr(
             "\
-[ERROR] the name `10-invalid` cannot be used as a package name, \
-the name cannot start with a digit\n\
+[ERROR] invalid character `1` in package name: `10-invalid`, the name cannot start with a digit
 If you need a binary with the name \"10-invalid\", use a valid package name, \
 and set the binary name to be different from the package. \
 This can be done by setting the binary filename to `src/bin/10-invalid.rs` \

tests/testsuite/profile_custom.rs

@@ -90,8 +90,7 @@ Caused by:
     |
   7 |                 [profile.'.release-lto']
     |                          ^^^^^^^^^^^^^^
-  invalid character `.` in profile name `.release-lto`
-  Allowed characters are letters, numbers, underscore, and hyphen.
+  invalid character `.` in profile name: `.release-lto`, allowed characters are letters, numbers, underscore, and hyphen
 ",
         )
         .run();