feat: Add --rust-version flag

Fixes #196
taiki-e · Sep 5, 2023 · 7c65eff · 7c65eff
1 parent ca5d3b9
commit 7c65eff
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Showing 7 changed files with 63 additions and 6 deletions.
diff --git a/README.md b/README.md
@@ -163,6 +163,11 @@ OPTIONS:
 
             This flag can only be used together with either --features or --include-features.
 
+        --rust-version
+            Perform commands on `package.rust-version`.
+
+            This cannot be used with --version-range.
+
         --version-range [START]..[=END]
             Perform commands on a specified (inclusive) range of Rust versions.
 

diff --git a/src/cli.rs b/src/cli.rs
@@ -149,6 +149,7 @@ impl Args {
         let mut keep_going = false;
         let mut print_command_list = false;
         let mut no_manifest_path = false;
+        let mut rust_version = false;
         let mut version_range = None;
         let mut version_step = None;
 
@@ -236,6 +237,7 @@ impl Args {
 
                 Long("manifest-path") => parse_opt!(manifest_path, false),
                 Long("depth") => parse_opt!(depth, false),
+                Long("rust-version") => parse_flag!(rust_version),
                 Long("version-range") => parse_opt!(version_range, false),
                 Long("version-step") => parse_opt!(version_step, false),
 
@@ -507,11 +509,28 @@ impl Args {
             }
         }
 
-        if version_range.is_some() {
-            let rustup = Rustup::new();
-            if rustup.version < 23 {
-                bail!("--version-range requires rustup 1.23 or later");
+        let version_range = match (version_range, rust_version) {
+            (Some(_), true) => {
+                conflicts("--version-range", "--rust-version")?;
+                unreachable!()
+            }
+            (Some(version_range), false) => {
+                let rustup = Rustup::new();
+                if rustup.version < 23 {
+                    bail!("--version-range requires rustup 1.23 or later");
+                }
+                Some(version_range.parse()?)
             }
+            (None, true) => {
+                let rustup = Rustup::new();
+                if rustup.version < 23 {
+                    bail!("--rust-version requires rustup 1.23 or later");
+                }
+                Some(VersionRange::msrv())
+            }
+            (None, false) => None,
+        };
+        if version_range.is_some() {
         } else {
             if version_step.is_some() {
                 requires("--version-step", &["--version-range"])?;
@@ -520,7 +539,6 @@ impl Args {
                 requires("--clean-per-version", &["--version-range"])?;
             }
         }
-        let version_range = version_range.map(|v| v.parse()).transpose()?;
 
         if no_dev_deps {
             info!(
@@ -728,6 +746,15 @@ const HELP: &[HelpText<'_>] = &[
         "Skip passing --features flag to `cargo` if that feature does not exist in the package",
         &["This flag can only be used together with either --features or --include-features."],
     ),
+    (
+        "",
+        "--rust-version",
+        "",
+        "Perform commands on `package.rust-version`",
+        &[
+            "This cannot be used with --version-range.",
+        ],
+    ),
     (
         "",
         "--version-range",

diff --git a/src/version.rs b/src/version.rs
@@ -46,6 +46,12 @@ pub(crate) struct VersionRange {
     pub(crate) end_inclusive: MaybeVersion,
 }
 
+impl VersionRange {
+    pub(crate) fn msrv() -> Self {
+        Self { start_inclusive: MaybeVersion::Msrv, end_inclusive: MaybeVersion::Msrv }
+    }
+}
+
 impl fmt::Display for VersionRange {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if let MaybeVersion::Version(start) = self.start_inclusive {

diff --git a/tests/auxiliary/mod.rs b/tests/auxiliary/mod.rs
@@ -61,7 +61,10 @@ pub fn cargo_hack<O: AsRef<OsStr>>(args: impl AsRef<[O]>) -> Command {
     let mut cmd = cargo_bin_exe();
     cmd.arg("hack");
     if let Some(toolchain) = test_version() {
-        if !args.iter().any(|a| a.as_ref().to_str().unwrap().starts_with("--version-range")) {
+        if !args.iter().any(|a| {
+            let s = a.as_ref().to_str().unwrap();
+            s.starts_with("--version-range") || s.starts_with("--rust-version")
+        }) {
             cmd.arg(format!("--version-range=1.{toolchain}..=1.{toolchain}"));
         }
     }

diff --git a/tests/long-help.txt b/tests/long-help.txt
@@ -134,6 +134,11 @@ OPTIONS:
 
             This flag can only be used together with either --features or --include-features.
 
+        --rust-version
+            Perform commands on `package.rust-version`.
+
+            This cannot be used with --version-range.
+
         --version-range [START]..[=END]
             Perform commands on a specified (inclusive) range of Rust versions.
 

diff --git a/tests/short-help.txt b/tests/short-help.txt
@@ -34,6 +34,7 @@ OPTIONS:
         --ignore-private                 Skip to perform on `publish = false` packages
         --ignore-unknown-features        Skip passing --features flag to `cargo` if that feature
                                          does not exist in the package
+        --rust-version                   Perform commands on `package.rust-version`
         --version-range [START]..[=END]  Perform commands on a specified (inclusive) range of Rust
                                          versions
         --version-step <NUM>             Specify the version interval of --version-range (default

diff --git a/tests/test.rs b/tests/test.rs
@@ -1353,6 +1353,16 @@ fn version_range() {
         );
 }
 
+#[cfg_attr(windows, ignore)] // rustup bug: https://github.com/rust-lang/rustup/issues/3036
+#[test]
+fn rust_version() {
+    cargo_hack(["check", "--rust-version"]).assert_success("rust-version").stderr_contains(
+        "
+            running `cargo +1.64 check` on real (1/1)
+            ",
+    );
+}
+
 #[cfg_attr(windows, ignore)] // rustup bug: https://github.com/rust-lang/rustup/issues/3036
 #[test]
 fn multi_target() {