Trigger auto-fix auto-matically (#44947)

This updates our CI workflow to try to run the autofix.yml workflow
if any of prettier, cargo fmt, or cargo clippy fail.

Release Notes:

- N/A

tooling/xtask/src/tasks/workflows/autofix_pr.rs

@@ -18,6 +18,12 @@ pub fn autofix_pr() -> Workflow {
                 .add_input(pr_number.name, pr_number.input())
                 .add_input(run_clippy.name, run_clippy.input()),
         ))
+        .concurrency(
+            Concurrency::new(Expression::new(format!(
+                "${{{{ github.workflow }}}}-{pr_number}"
+            )))
+            .cancel_in_progress(true),
+        )
         .add_job(run_autofix.name.clone(), run_autofix.job)
         .add_job(commit_changes.name, commit_changes.job)
 }

tooling/xtask/src/tasks/workflows/run_tests.rs

@@ -237,10 +237,11 @@ fn check_style() -> NamedJob {
             .add_step(steps::cache_rust_dependencies_namespace())
             .add_step(steps::setup_pnpm())
             .add_step(steps::script("./script/prettier"))
+            .add_step(steps::cargo_fmt())
+            .add_step(steps::trigger_autofix(false))
             .add_step(steps::script("./script/check-todos"))
             .add_step(steps::script("./script/check-keymaps"))
-            .add_step(check_for_typos())
-            .add_step(steps::cargo_fmt()),
+            .add_step(check_for_typos()),
     )
 }
 
@@ -326,7 +327,8 @@ pub(crate) fn run_platform_tests(platform: Platform) -> NamedJob {
             .add_step(steps::setup_node())
             .add_step(steps::clippy(platform))
             .when(platform == Platform::Linux, |job| {
-                job.add_step(steps::cargo_install_nextest())
+                job.add_step(steps::trigger_autofix(true))
+                    .add_step(steps::cargo_install_nextest())
             })
             .add_step(steps::clear_target_dir_if_large(platform))
             .add_step(steps::cargo_nextest(platform))

tooling/xtask/src/tasks/workflows/steps.rs

@@ -344,3 +344,13 @@ pub fn git_checkout(ref_name: &dyn std::fmt::Display) -> Step<Run> {
         "git fetch origin {ref_name} && git checkout {ref_name}"
     ))
 }
+
+pub fn trigger_autofix(run_clippy: bool) -> Step<Run> {
+    named::bash(format!(
+        "gh workflow run autofix_pr.yml -f pr_number=${{{{ github.event.pull_request.number }}}} -f run_clippy={run_clippy}"
+    ))
+    .if_condition(Expression::new(
+        "failure() && github.event_name == 'pull_request' && github.actor != 'zed-zippy[bot]'",
+    ))
+    .add_env(("GITHUB_TOKEN", vars::GITHUB_TOKEN))
+}