Detect and allow older nightlies

1 files changed, 51 insertions, 0 deletions

diff --git a/embassy-executor/build_common.rs b/embassy-executor/build_common.rs
index 4f24e6d37..af6bb0618 100644
--- a/embassy-executor/build_common.rs
+++ b/embassy-executor/build_common.rs
@@ -92,3 +92,54 @@ pub fn set_target_cfgs(cfgs: &mut CfgSet) {
 
     cfgs.set("has_fpu", target.ends_with("-eabihf"));
 }
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub struct CompilerDate {
+    year: u16,
+    month: u8,
+    day: u8,
+}
+
+impl CompilerDate {
+    fn parse(date: &str) -> Option<Self> {
+        let mut parts = date.split('-');
+        let year = parts.next()?.parse().ok()?;
+        let month = parts.next()?.parse().ok()?;
+        let day = parts.next()?.parse().ok()?;
+        Some(Self { year, month, day })
+    }
+}
+
+impl PartialEq<&str> for CompilerDate {
+    fn eq(&self, other: &&str) -> bool {
+        let Some(other) = Self::parse(other) else {
+            return false;
+        };
+        self.eq(&other)
+    }
+}
+
+impl PartialOrd<&str> for CompilerDate {
+    fn partial_cmp(&self, other: &&str) -> Option<std::cmp::Ordering> {
+        Self::parse(other).map(|other| self.cmp(&other))
+    }
+}
+
+pub struct CompilerInfo {
+    #[allow(unused)]
+    pub version: rustc_version::Version,
+    pub channel: rustc_version::Channel,
+    pub commit_date: Option<CompilerDate>,
+}
+
+pub fn compiler_info() -> Option<CompilerInfo> {
+    let Ok(meta) = rustc_version::version_meta() else {
+        return None;
+    };
+
+    Some(CompilerInfo {
+        version: meta.semver,
+        channel: meta.channel,
+        commit_date: meta.commit_date.as_deref().and_then(CompilerDate::parse),
+    })
+}