Initial version

build.rs

@@ -0,0 +1,42 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+
+    // By default cortex-m-rt expects memory.x, however this causes issues with workspaces as it
+    // will pick the first file that is found.
+    // In order to get around this we make a dummy memory.x file
+    File::create(out.join("memory.x")).unwrap();
+
+    // Use memory.x.in as a template for the actual memory.x
+    let memory = include_str!("memory.x.in")
+        .replace("{BOOTLOADER}", "BOOTLOADER")
+        .replace("{ACTIVE}", "FLASH");
+
+    // And then include it with a unique name
+    File::create(out.join("memory_app.x"))
+        .unwrap()
+        .write_all(memory.as_bytes())
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+    println!("cargo:rerun-if-changed=memory.x.in");
+
+    // And link with that one
+    println!("cargo:rustc-link-arg-bins=-Tmemory_app.x");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+
+    if let Ok(dotenv_path) = dotenvy::dotenv() {
+        println!("cargo:rerun-if-changed={}", dotenv_path.display());
+
+        for env_var in dotenvy::dotenv_iter().unwrap() {
+            let (key, value) = env_var.unwrap();
+            println!("cargo:rustc-env={key}={value}");
+        }
+    }
+}