add cargo env workaround

Author: MabezDev

esp-config/src/generate.rs

@@ -76,6 +76,7 @@ pub fn generate_config(
  // only rebuild if build.rs changed. Otherwise Cargo will rebuild if any
  // other file changed.
  println!("cargo:rerun-if-changed=build.rs");
+ env_change_work_around();
 
  // ensure that the prefix is `SCREAMING_SNAKE_CASE`
  let prefix = format!("{}_", screaming_snake_case(prefix));
@@ -94,6 +95,35 @@ pub fn generate_config(
  configs
 }
 
+// A work-around for https://github.com/rust-lang/cargo/issues/10358
+// This can be removed when https://github.com/rust-lang/cargo/pull/14058 is merged.
+// Unlikely to work on projects in workspaces
+fn env_change_work_around() {
+ let mut out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
+
+ // We clean out_dir by removing all trailing directories, until it ends with
+ // target
+ while !out_dir.ends_with("target") {
+ if !out_dir.pop() {
+ // We ran out of directories...
+ return;
+ }
+ }
+ out_dir.pop();
+
+ let dotcargo = out_dir.join(".cargo/");
+ if dotcargo.exists() {
+ println!(
+ "cargo:rerun-if-changed={}",
+ dotcargo.clone().join("config.toml").to_str().unwrap()
+ );
+ println!(
+ "cargo:rerun-if-changed={}",
+ dotcargo.clone().join("config").to_str().unwrap()
+ );
+ }
+}
+
 fn emit_configuration(
  prefix: &str,
  configs: &HashMap<String, Value>,