fix: set msrv and gate incompat feature

Author: demosdemon

Cargo.toml

@@ -15,6 +15,7 @@ readme = "README.md"
 keywords = ["git", "git-remote", "codecommit"]
 categories = ["command-line-utilities", "development-tools"]
 publish = true
+rust-version = "1.85.0"
 
 [workspace.lints.rust]
 let_underscore_drop = "warn"

crates/git-remote-codecommit/Cargo.toml

@@ -11,10 +11,15 @@ readme.workspace = true
 keywords.workspace = true
 categories.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lints]
 workspace = true
 
+[features]
+default = []
+debug-probe = [] ## msrv: 1.87.0
+
 [dependencies]
 anyhow = "1.0.86"
 aws-config = "1.5.3"

crates/git-remote-codecommit/build.rs

@@ -8,7 +8,9 @@
 //! very new but replaces the manually implemented `BoolExt` trait.
 
 use std::ffi::OsString;
+#[cfg(feature = "debug-probe")]
 use std::fmt;
+#[cfg(feature = "debug-probe")]
 use std::fmt::Write;
 use std::fs;
 use std::io::ErrorKind;
@@ -125,7 +127,9 @@ fn compile_probe(rustc_bootstrap: bool) -> bool {
         }
     }
 
+    #[cfg(feature = "debug-probe")]
     let debug = rustc_probe_debug();
+    #[cfg(feature = "debug-probe")]
     if debug {
         let mut msg = String::new();
         write_command(&mut msg, &cmd).expect("write to string does not fail");
@@ -141,10 +145,14 @@ fn compile_probe(rustc_bootstrap: bool) -> bool {
     // Clean up to avoid leaving nondeterministic absolute paths in the dep-info
     // file in OUT_DIR, which causes nonreproducible builds in build systems
     // that treat the entire OUT_DIR as an artifact.
+    #[cfg(feature = "debug-probe")]
     if !debug {
         rmrf(&out_subdir);
     }
 
+    #[cfg(not(feature = "debug-probe"))]
+    rmrf(&out_subdir);
+
     success
 }
 
@@ -198,6 +206,7 @@ fn rustc_command() -> Command {
     }
 }
 
+#[cfg(feature = "debug-probe")]
 fn rustc_probe_debug() -> bool {
     fn is_falsy(mut s: OsString) -> bool {
         if s.len() <= 5 {
@@ -216,6 +225,7 @@ fn rustc_probe_debug() -> bool {
     }
 }
 
+#[cfg(feature = "debug-probe")]
 fn write_command(out: &mut impl Write, cmd: &Command) -> fmt::Result {
     writeln!(out, "Running RUSTC command:")?;
     if let Some(cwd) = cmd.get_current_dir() {