warn newer available version of the x tool

Cargo.lock

@@ -4805,18 +4805,18 @@ checksum = "1ef965a420fe14fdac7dd018862966a4c14094f900e1650bbc71ddd7d580c8af"
 
 [[package]]
 name = "semver"
-version = "1.0.12"
+version = "1.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2333e6df6d6598f2b1974829f853c2b4c5f4a6e503c10af918081aa6f8564e1"
+checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "serde"
-version = "1.0.147"
+version = "1.0.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
+checksum = "bb7d1f0d3021d347a83e556fc4683dea2ea09d87bccdf88ff5c12545d89d5efb"
 dependencies = [
  "serde_derive",
 ]
@@ -4833,9 +4833,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.147"
+version = "1.0.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f1d362ca8fc9c3e3a7484440752472d68a6caa98f1ab81d99b5dfe517cec852"
+checksum = "af487d118eecd09402d70a5d72551860e788df87b464af30e5ea6a38c75c541e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4853,9 +4853,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.85"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
 dependencies = [
  "indexmap",
  "itoa",
@@ -5133,9 +5133,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.102"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fcd952facd492f9be3ef0d0b7032a6e442ee9b361d4acc2b1d0c4aaa5f613a1"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -5309,6 +5309,7 @@ dependencies = [
  "lazy_static",
  "miropt-test-tools",
  "regex",
+ "semver",
  "termcolor",
  "walkdir",
 ]

src/bootstrap/bootstrap.py

@@ -934,8 +934,7 @@ def main():
     if len(sys.argv) > 1 and sys.argv[1] == 'help':
         sys.argv = [sys.argv[0], '-h'] + sys.argv[2:]
 
-    help_triggered = (
-        '-h' in sys.argv) or ('--help' in sys.argv) or (len(sys.argv) == 1)
+    help_triggered = len(sys.argv) == 1 or any(x in ["-h", "--help", "--version"] for x in sys.argv)
     try:
         bootstrap(help_triggered)
         if not help_triggered:

src/tools/tidy/Cargo.toml

@@ -11,6 +11,7 @@ miropt-test-tools = { path = "../miropt-test-tools" }
 lazy_static = "1"
 walkdir = "2"
 ignore = "0.4.18"
+semver = "1.0.14"
 termcolor = "1.1.3"
 
 [[bin]]

src/tools/tidy/src/lib.rs

@@ -69,3 +69,4 @@ pub mod ui_tests;
 pub mod unit_tests;
 pub mod unstable_book;
 pub mod walk;
+pub mod x_version;

src/tools/tidy/src/main.rs

@@ -58,7 +58,7 @@ fn main() {
 
                 let handle = s.spawn(|| {
                     let mut flag = false;
-                    $p::check($($args),* , &mut flag);
+                    $p::check($($args, )* &mut flag);
                     if (flag) {
                         bad.store(true, Ordering::Relaxed);
                     }
@@ -107,6 +107,8 @@ fn main() {
         check!(alphabetical, &compiler_path);
         check!(alphabetical, &library_path);
 
+        check!(x_version, &root_path, &cargo);
+
         let collected = {
             drain_handles(&mut handles);
 

src/tools/tidy/src/x_version.rs

@@ -0,0 +1,65 @@
+use semver::Version;
+use std::io::ErrorKind;
+use std::path::Path;
+use std::process::{Command, Stdio};
+
+pub fn check(root: &Path, cargo: &Path, bad: &mut bool) {
+    let result = Command::new("x").arg("--wrapper-version").stdout(Stdio::piped()).spawn();
+    // This runs the command inside a temporary directory.
+    // This allows us to compare output of result to see if `--wrapper-version` is not a recognized argument to x.
+    let temp_result = Command::new("x")
+        .arg("--wrapper-version")
+        .current_dir(std::env::temp_dir())
+        .stdout(Stdio::piped())
+        .spawn();
+
+    let (child, temp_child) = match (result, temp_result) {
+        (Ok(child), Ok(temp_child)) => (child, temp_child),
+        (Err(e), _) | (_, Err(e)) => match e.kind() {
+            ErrorKind::NotFound => return,
+            _ => return tidy_error!(bad, "failed to run `x`: {}", e),
+        },
+    };
+
+    let output = child.wait_with_output().unwrap();
+    let temp_output = temp_child.wait_with_output().unwrap();
+
+    if output != temp_output {
+        return tidy_error!(
+            bad,
+            "Current version of x does not support the `--wrapper-version` argument\nConsider updating to the newer version of x by running `cargo install --path src/tools/x`"
+        );
+    }
+
+    if output.status.success() {
+        let version = String::from_utf8_lossy(&output.stdout);
+        let version = Version::parse(version.trim_end()).unwrap();
+
+        if let Some(expected) = get_x_wrapper_version(root, cargo) {
+            if version < expected {
+                return tidy_error!(
+                    bad,
+                    "Current version of x is {version}, but the latest version is {expected}\nConsider updating to the newer version of x by running `cargo install --path src/tools/x`"
+                );
+            }
+        } else {
+            return tidy_error!(
+                bad,
+                "Unable to parse the latest version of `x` at `src/tools/x/Cargo.toml`"
+            );
+        }
+    } else {
+        return tidy_error!(bad, "failed to check version of `x`: {}", output.status);
+    }
+}
+
+// Parse latest version out of `x` Cargo.toml
+fn get_x_wrapper_version(root: &Path, cargo: &Path) -> Option<Version> {
+    let mut cmd = cargo_metadata::MetadataCommand::new();
+    cmd.cargo_path(cargo)
+        .manifest_path(root.join("src/tools/x/Cargo.toml"))
+        .no_deps()
+        .features(cargo_metadata::CargoOpt::AllFeatures);
+    let mut metadata = t!(cmd.exec());
+    metadata.packages.pop().map(|x| x.version)
+}

src/tools/x/src/main.rs

@@ -52,6 +52,14 @@ fn exec_or_status(command: &mut Command) -> io::Result<ExitStatus> {
 }
 
 fn main() {
+    match env::args().skip(1).next().as_deref() {
+        Some("--wrapper-version") => {
+            let version = env!("CARGO_PKG_VERSION");
+            println!("{}", version);
+            return;
+        }
+        _ => {}
+    }
     let current = match env::current_dir() {
         Ok(dir) => dir,
         Err(err) => {