add './miri doc' command

src/tools/miri/.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
       - name: clippy (all features)
         run: ./miri clippy --all-features -- -D warnings
       - name: rustdoc
-        run: RUSTDOCFLAGS="-Dwarnings" ./miri cargo doc --document-private-items
+        run: RUSTDOCFLAGS="-Dwarnings" ./miri doc --document-private-items
 
   # These jobs doesn't actually test anything, but they're only used to tell
   # bors the build completed, as there is no practical way to detect when a

src/tools/miri/miri-script/src/commands.rs

@@ -153,6 +153,7 @@ impl Command {
             | Command::Test { .. }
             | Command::Run { .. }
             | Command::Fmt { .. }
+            | Command::Doc { .. }
             | Command::Clippy { .. } => Self::auto_actions()?,
             | Command::Toolchain { .. }
             | Command::Bench { .. }
@@ -167,6 +168,7 @@ impl Command {
             Command::Test { bless, flags, target } => Self::test(bless, flags, target),
             Command::Run { dep, verbose, many_seeds, target, edition, flags } =>
                 Self::run(dep, verbose, many_seeds, target, edition, flags),
+            Command::Doc { flags } => Self::doc(flags),
             Command::Fmt { flags } => Self::fmt(flags),
             Command::Clippy { flags } => Self::clippy(flags),
             Command::Bench { target, benches } => Self::bench(target, benches),
@@ -439,6 +441,13 @@ impl Command {
         Ok(())
     }
 
+    fn doc(flags: Vec<String>) -> Result<()> {
+        let e = MiriEnv::new()?;
+        e.doc(path!(e.miri_dir / "Cargo.toml"), &flags)?;
+        e.doc(path!(e.miri_dir / "cargo-miri" / "Cargo.toml"), &flags)?;
+        Ok(())
+    }
+
     fn clippy(flags: Vec<String>) -> Result<()> {
         let e = MiriEnv::new()?;
         e.clippy(path!(e.miri_dir / "Cargo.toml"), &flags)?;

src/tools/miri/miri-script/src/main.rs

@@ -48,6 +48,11 @@ pub enum Command {
         /// Flags that are passed through to `miri`.
         flags: Vec<String>,
     },
+    /// Build documentation
+    Doc {
+        /// Flags that are passed through to `cargo doc`.
+        flags: Vec<String>,
+    },
     /// Format all sources and tests.
     Fmt {
         /// Flags that are passed through to `rustfmt`.
@@ -148,6 +153,7 @@ fn main() -> Result<()> {
     let command = match args.next_raw().as_deref() {
         Some("build") => Command::Build { flags: args.remainder() },
         Some("check") => Command::Check { flags: args.remainder() },
+        Some("doc") => Command::Doc { flags: args.remainder() },
         Some("test") => {
             let mut target = None;
             let mut bless = false;

src/tools/miri/miri-script/src/util.rs

@@ -150,6 +150,11 @@ impl MiriEnv {
         Ok(())
     }
 
+    pub fn doc(&self, manifest_path: impl AsRef<OsStr>, args: &[String]) -> Result<()> {
+        self.cargo_cmd(manifest_path, "doc").args(args).run()?;
+        Ok(())
+    }
+
     pub fn clippy(&self, manifest_path: impl AsRef<OsStr>, args: &[String]) -> Result<()> {
         self.cargo_cmd(manifest_path, "clippy").arg("--all-targets").args(args).run()?;
         Ok(())