Adding build script, further debug info

README.md

@@ -232,3 +232,13 @@ Bootloader USB interface.
 ```
 dfu-util -a 0 -s 0x08000000:leave --download booster.bin
 ```
+
+# Generating Releases
+
+When a release is ready, `develop` must be merged into `master`.
+
+The corresponding merge commit is then tagged with the version in the form of `vX.Y.Z`, where X, Y,
+and Z are the semantic version major, minor, and patch versions. The tag must be pushed using `git
+push origin vX.Y.Z`. This will automatically trigger CI to generate the release.
+
+After the tag is generated, `master` must be merged back into `develop`.

build.rs

@@ -0,0 +1,40 @@
+//! Booster NGFW build script
+//!
+//! # Copyright
+//! Copyright (C) 2020 QUARTIQ GmbH - All Rights Reserved
+//! Unauthorized usage, editing, or copying is strictly prohibited.
+//! Proprietary and confidential.
+//!
+//! # Note
+//! This build script is run immediately before the build is completed and is used to inject
+//! environment variables into the build.
+use std::process::Command;
+
+fn main() {
+    // Inject the git revision into an environment variable for compilation.
+    let output = Command::new("git")
+        .args(&["rev-parse", "HEAD"])
+        .output()
+        .unwrap();
+    let revision = String::from_utf8(output.stdout).unwrap();
+    println!("cargo:rustc-env=GIT_REVISION={}", revision);
+
+    let output = Command::new("git")
+        .args(&["describe", "--tags"])
+        .output()
+        .unwrap();
+    let version = String::from_utf8(output.stdout).unwrap();
+    println!("cargo:rustc-env=VERSION={}", version);
+
+    // Collect all of the enabled features and inject them as an environment variable.
+    let mut features: Vec<String> = Vec::new();
+    for (key, _) in std::env::vars() {
+        let strings: Vec<&str> = key.split("CARGO_FEATURE_").collect();
+        if strings.len() > 1 {
+            println!("{}", strings[1]);
+            features.push(String::from(strings[1]));
+        }
+    }
+
+    println!("cargo:rustc-env=ALL_FEATURES={}", features.join(", "));
+}

src/serial_terminal.rs

@@ -173,6 +173,18 @@ impl SerialTerminal {
                     // Reading the panic message above clears the panic message, so similarly, we
                     // should also clear the watchdog once read.
                     platform::clear_reset_flags();
+
+                    self.write("Git revision: ".as_bytes());
+                    self.write(env!("GIT_REVISION").as_bytes());
+                    self.write("\n".as_bytes());
+
+                    self.write("Features: ".as_bytes());
+                    self.write(env!("ALL_FEATURES").as_bytes());
+                    self.write("\n".as_bytes());
+
+                    self.write("Version: ".as_bytes());
+                    self.write(env!("VERSION").as_bytes());
+                    self.write("\n".as_bytes());
                 }
 
                 Request::WriteIpAddress(prop, addr) => match prop {