Accept a PEP 440 version specifier for required-version

Cargo.toml

@@ -76,7 +76,6 @@ result-like = { version = "0.5.0" }
 rustc-hash = { version = "1.1.0" }
 schemars = { version = "0.8.16" }
 seahash = { version = "4.1.0" }
-semver = { version = "1.0.22" }
 serde = { version = "1.0.197", features = ["derive"] }
 serde-wasm-bindgen = { version = "0.6.4" }
 serde_json = { version = "1.0.113" }

crates/ruff/tests/lint.rs

@@ -849,7 +849,7 @@ fn deprecated_config_option_overridden_via_cli() {
     success: false
     exit_code: 1
     ----- stdout -----
-    -:1:7: N801 Class name `lowercase` should use CapWords convention 
+    -:1:7: N801 Class name `lowercase` should use CapWords convention
     Found 1 error.
 
     ----- stderr -----
@@ -972,3 +972,157 @@ import os
 
     Ok(())
 }
+
+#[test]
+fn required_version_exact_mismatch() -> Result<()> {
+    let version = env!("CARGO_PKG_VERSION");
+
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+required-version = "0.1.0"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/"), (version, "[VERSION]")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"
+import os
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    ruff failed
+      Cause: Required version `==0.1.0` does not match the running version `[VERSION]`
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn required_version_exact_match() -> Result<()> {
+    let version = env!("CARGO_PKG_VERSION");
+
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        format!(
+            r#"
+required-version = "{version}"
+"#
+        ),
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/"), (version, "[VERSION]")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"
+import os
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:2:8: F401 [*] `os` imported but unused
+    Found 1 error.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn required_version_bound_mismatch() -> Result<()> {
+    let version = env!("CARGO_PKG_VERSION");
+
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        format!(
+            r#"
+required-version = ">{version}"
+"#
+        ),
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/"), (version, "[VERSION]")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"
+import os
+"#), @r###"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    ruff failed
+      Cause: Required version `>[VERSION]` does not match the running version `[VERSION]`
+    "###);
+    });
+
+    Ok(())
+}
+
+#[test]
+fn required_version_bound_match() -> Result<()> {
+    let version = env!("CARGO_PKG_VERSION");
+
+    let tempdir = TempDir::new()?;
+    let ruff_toml = tempdir.path().join("ruff.toml");
+    fs::write(
+        &ruff_toml,
+        r#"
+required-version = ">=0.1.0"
+"#,
+    )?;
+
+    insta::with_settings!({
+        filters => vec![(tempdir_filter(&tempdir).as_str(), "[TMP]/"), (version, "[VERSION]")]
+    }, {
+    assert_cmd_snapshot!(Command::new(get_cargo_bin(BIN_NAME))
+        .args(STDIN_BASE_OPTIONS)
+        .arg("--config")
+        .arg(&ruff_toml)
+        .arg("-")
+        .pass_stdin(r#"
+import os
+"#), @r###"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+    -:2:8: F401 [*] `os` imported but unused
+    Found 1 error.
+    [*] 1 fixable with the `--fix` option.
+
+    ----- stderr -----
+    "###);
+    });
+
+    Ok(())
+}

crates/ruff_linter/Cargo.toml

@@ -60,7 +60,6 @@ regex = { workspace = true }
 result-like = { workspace = true }
 rustc-hash = { workspace = true }
 schemars = { workspace = true, optional = true }
-semver = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 similar = { workspace = true }

crates/ruff_linter/src/settings/types.rs

@@ -7,7 +7,7 @@ use std::string::ToString;
 
 use anyhow::{bail, Result};
 use globset::{Glob, GlobMatcher, GlobSet, GlobSetBuilder};
-use pep440_rs::{Version as Pep440Version, VersionSpecifiers};
+use pep440_rs::{Version as Pep440Version, VersionSpecifier, VersionSpecifiers};
 use rustc_hash::FxHashMap;
 use serde::{de, Deserialize, Deserializer, Serialize};
 use strum::IntoEnumIterator;
@@ -536,22 +536,44 @@ impl SerializationFormat {
 
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Hash)]
 #[serde(try_from = "String")]
-#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
-pub struct Version(String);
+pub struct RequiredVersion(VersionSpecifiers);
 
-impl TryFrom<String> for Version {
-    type Error = semver::Error;
+impl TryFrom<String> for RequiredVersion {
+    type Error = pep440_rs::Pep440Error;
 
     fn try_from(value: String) -> Result<Self, Self::Error> {
-        semver::Version::parse(&value).map(|_| Self(value))
+        // Treat `0.3.1` as `==0.3.1`, for backwards compatibility.
+        if let Ok(version) = pep440_rs::Version::from_str(&value) {
+            Ok(Self(VersionSpecifiers::from(
+                VersionSpecifier::equals_version(version),
+            )))
+        } else {
+            Ok(Self(VersionSpecifiers::from_str(&value)?))
+        }
     }
 }
 
-impl Deref for Version {
-    type Target = str;
+#[cfg(feature = "schemars")]
+impl schemars::JsonSchema for RequiredVersion {
+    fn schema_name() -> String {
+        "RequiredVersion".to_string()
+    }
 
-    fn deref(&self) -> &Self::Target {
-        &self.0
+    fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
+        gen.subschema_for::<String>()
+    }
+}
+
+impl RequiredVersion {
+    /// Return `true` if the given version is required.
+    pub fn contains(&self, version: &pep440_rs::Version) -> bool {
+        self.0.contains(version)
+    }
+}
+
+impl Display for RequiredVersion {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        Display::fmt(&self.0, f)
     }
 }
 

crates/ruff_workspace/src/configuration.rs

@@ -6,12 +6,12 @@ use std::borrow::Cow;
 use std::env::VarError;
 use std::num::{NonZeroU16, NonZeroU8};
 use std::path::{Path, PathBuf};
+use std::str::FromStr;
 
 use anyhow::{anyhow, Result};
 use glob::{glob, GlobError, Paths, PatternError};
 use itertools::Itertools;
 use regex::Regex;
-use ruff_linter::settings::fix_safety_table::FixSafetyTable;
 use rustc_hash::{FxHashMap, FxHashSet};
 use shellexpand;
 use shellexpand::LookupError;
@@ -24,10 +24,11 @@ use ruff_linter::registry::RuleNamespace;
 use ruff_linter::registry::{Rule, RuleSet, INCOMPATIBLE_CODES};
 use ruff_linter::rule_selector::{PreviewOptions, Specificity};
 use ruff_linter::rules::pycodestyle;
+use ruff_linter::settings::fix_safety_table::FixSafetyTable;
 use ruff_linter::settings::rule_table::RuleTable;
 use ruff_linter::settings::types::{
     ExtensionMapping, FilePattern, FilePatternSet, PerFileIgnore, PerFileIgnores, PreviewMode,
-    PythonVersion, SerializationFormat, UnsafeFixes, Version,
+    PythonVersion, RequiredVersion, SerializationFormat, UnsafeFixes,
 };
 use ruff_linter::settings::{LinterSettings, DEFAULT_SELECTORS, DUMMY_VARIABLE_RGX, TASK_TAGS};
 use ruff_linter::{
@@ -116,7 +117,7 @@ pub struct Configuration {
     pub unsafe_fixes: Option<UnsafeFixes>,
     pub output_format: Option<SerializationFormat>,
     pub preview: Option<PreviewMode>,
-    pub required_version: Option<Version>,
+    pub required_version: Option<RequiredVersion>,
     pub extension: Option<ExtensionMapping>,
     pub show_fixes: Option<bool>,
 
@@ -145,10 +146,12 @@ pub struct Configuration {
 impl Configuration {
     pub fn into_settings(self, project_root: &Path) -> Result<Settings> {
         if let Some(required_version) = &self.required_version {
-            if &**required_version != RUFF_PKG_VERSION {
+            let ruff_pkg_version = pep440_rs::Version::from_str(RUFF_PKG_VERSION)
+                .expect("RUFF_PKG_VERSION is not a valid PEP 440 version specifier");
+            if !required_version.contains(&ruff_pkg_version) {
                 return Err(anyhow!(
                     "Required version `{}` does not match the running version `{}`",
-                    &**required_version,
+                    required_version,
                     RUFF_PKG_VERSION
                 ));
             }
@@ -1467,15 +1470,18 @@ fn warn_about_deprecated_top_level_lint_options(
 
 #[cfg(test)]
 mod tests {
-    use crate::configuration::{LintConfiguration, RuleSelection};
-    use crate::options::PydocstyleOptions;
+    use std::str::FromStr;
+
     use anyhow::Result;
+
     use ruff_linter::codes::{Flake8Copyright, Pycodestyle, Refurb};
     use ruff_linter::registry::{Linter, Rule, RuleSet};
     use ruff_linter::rule_selector::PreviewOptions;
     use ruff_linter::settings::types::PreviewMode;
     use ruff_linter::RuleSelector;
-    use std::str::FromStr;
+
+    use crate::configuration::{LintConfiguration, RuleSelection};
+    use crate::options::PydocstyleOptions;
 
     const PREVIEW_RULES: &[Rule] = &[
         Rule::IsinstanceTypeNone,

crates/ruff_workspace/src/options.rs

@@ -6,7 +6,6 @@ use rustc_hash::{FxHashMap, FxHashSet};
 use serde::{Deserialize, Serialize};
 use strum::IntoEnumIterator;
 
-use crate::options_base::{OptionsMetadata, Visit};
 use ruff_formatter::IndentStyle;
 use ruff_linter::line_width::{IndentWidth, LineLength};
 use ruff_linter::rules::flake8_pytest_style::settings::SettingsError;
@@ -25,12 +24,13 @@ use ruff_linter::rules::{
     pycodestyle, pydocstyle, pyflakes, pylint, pyupgrade,
 };
 use ruff_linter::settings::types::{
-    IdentifierPattern, PythonVersion, SerializationFormat, Version,
+    IdentifierPattern, PythonVersion, RequiredVersion, SerializationFormat,
 };
 use ruff_linter::{warn_user_once, RuleSelector};
 use ruff_macros::{CombineOptions, OptionsMetadata};
 use ruff_python_formatter::{DocstringCodeLineWidth, QuoteStyle};
 
+use crate::options_base::{OptionsMetadata, Visit};
 use crate::settings::LineEnding;
 
 #[derive(Clone, Debug, PartialEq, Eq, Default, OptionsMetadata, Serialize, Deserialize)]
@@ -135,17 +135,22 @@ pub struct Options {
     )]
     pub show_fixes: Option<bool>,
 
-    /// Require a specific version of Ruff to be running (useful for unifying
-    /// results across many environments, e.g., with a `pyproject.toml`
-    /// file).
+    /// Enforce a requirement on the version of Ruff, to enforce at runtime.
+    /// If the version of Ruff does not meet the requirement, Ruff will exit
+    /// with an error.
+    ///
+    /// Useful for unifying results across many environments, e.g., with a
+    /// `pyproject.toml` file.
+    ///
+    /// Accepts a PEP 440 specifier, like `==0.3.1` or `>=0.3.1`.
     #[option(
         default = "null",
         value_type = "str",
         example = r#"
-            required-version = "0.0.193"
+            required-version = ">=0.0.193"
         "#
     )]
-    pub required_version: Option<Version>,
+    pub required_version: Option<RequiredVersion>,
 
     /// Whether to enable preview mode. When preview mode is enabled, Ruff will
     /// use unstable rules, fixes, and formatting.