From dffe82b26ee2c456e47275fccb6112b9d160e717 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 26 Mar 2023 13:51:02 -0700
Subject: [PATCH] Perform build-time alerts in test suite using build-alert
 crate

---
 tests/features/Cargo.toml       |  4 +--
 tests/features/lib.rs           | 17 +++++++++-
 tests/features/macro/Cargo.toml | 16 ---------
 tests/features/macro/lib.rs     | 59 ---------------------------------
 4 files changed, 18 insertions(+), 78 deletions(-)
 delete mode 100644 tests/features/macro/Cargo.toml
 delete mode 100644 tests/features/macro/lib.rs

diff --git a/tests/features/Cargo.toml b/tests/features/Cargo.toml
index 22c719928f..7c9a937159 100644
--- a/tests/features/Cargo.toml
+++ b/tests/features/Cargo.toml
@@ -9,7 +9,7 @@ publish = false
 path = "lib.rs"
 
 [dependencies]
-syn-test-suite-feature-check = { path = "macro" }
+build-alert = "0.1"
 
 [features]
-all-features = ["syn-test-suite-feature-check/all-features"]
+all-features = []
diff --git a/tests/features/lib.rs b/tests/features/lib.rs
index 5aad327b8a..506b42cd72 100644
--- a/tests/features/lib.rs
+++ b/tests/features/lib.rs
@@ -1 +1,16 @@
-syn_test_suite_feature_check::check!();
+#[cfg(debug_assertions)]
+build_alert::yellow! {"
+NOTE:  use --release
+  Syn's test suite has some tests that run on every source file
+  and test case in the rust-lang/rust repo, which can be pretty
+  slow in debug mode. Consider running cargo test with `--release`
+  to speed things up.
+"}
+
+#[cfg(not(feature = "all-features"))]
+build_alert::red! {"
+ERROR:  use --all-features
+  Syn's test suite normally only works with all-features enabled.
+  Run again with `--all-features`, or run with `--features test`
+  to bypass this check.
+"}
diff --git a/tests/features/macro/Cargo.toml b/tests/features/macro/Cargo.toml
deleted file mode 100644
index 4d1f69161c..0000000000
--- a/tests/features/macro/Cargo.toml
+++ /dev/null
@@ -1,16 +0,0 @@
-[package]
-name = "syn-test-suite-feature-check"
-version = "0.0.0"
-authors = ["David Tolnay <dtolnay@gmail.com>"]
-edition = "2021"
-publish = false
-
-[lib]
-path = "lib.rs"
-proc-macro = true
-
-[dependencies]
-termcolor = "1"
-
-[features]
-all-features = []
diff --git a/tests/features/macro/lib.rs b/tests/features/macro/lib.rs
deleted file mode 100644
index 62f361626e..0000000000
--- a/tests/features/macro/lib.rs
+++ /dev/null
@@ -1,59 +0,0 @@
-#![allow(
-    clippy::let_underscore_untyped,
-    clippy::toplevel_ref_arg,
-    clippy::uninlined_format_args
-)]
-
-use proc_macro::TokenStream;
-use std::io::Write;
-use std::process;
-use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
-
-const DEBUG_NOTE: &str = ":  use --release
-  Syn's test suite has some tests that run on every source file
-  and test case in the rust-lang/rust repo, which can be pretty
-  slow in debug mode. Consider running cargo test with `--release`
-  to speed things up.";
-
-const FEATURES_ERROR: &str = ":  use --all-features
-  Syn's test suite normally only works with all-features enabled.
-  Run again with `--all-features`, or run with `--features test`
-  to bypass this check.";
-
-#[proc_macro]
-pub fn check(_input: TokenStream) -> TokenStream {
-    let ref mut stderr = StandardStream::stderr(ColorChoice::Auto);
-    let mut needs_newline = true;
-
-    if cfg!(debug_assertions) {
-        let yellow = ColorSpec::new().set_fg(Some(Color::Yellow)).clone();
-        let _ = writeln!(stderr);
-        let _ = stderr.set_color(yellow.clone().set_bold(true));
-        let _ = write!(stderr, "NOTE");
-        for line in DEBUG_NOTE.lines() {
-            let _ = stderr.set_color(&yellow);
-            let _ = writeln!(stderr, "{}", line);
-        }
-        let _ = stderr.reset();
-        let _ = writeln!(stderr);
-        needs_newline = false;
-    }
-
-    if cfg!(not(feature = "all-features")) {
-        let red = ColorSpec::new().set_fg(Some(Color::Red)).clone();
-        if needs_newline {
-            let _ = writeln!(stderr);
-        }
-        let _ = stderr.set_color(red.clone().set_bold(true));
-        let _ = write!(stderr, "ERROR");
-        for line in FEATURES_ERROR.lines() {
-            let _ = stderr.set_color(&red);
-            let _ = writeln!(stderr, "{}", line);
-        }
-        let _ = stderr.reset();
-        let _ = writeln!(stderr);
-        process::exit(1);
-    }
-
-    TokenStream::new()
-}