auto generate zenoh version in header from version.txt (#800)

* auto generate zenoh version in header from version.txt

* copy version.txt to build directory

CMakeLists.txt

@@ -114,6 +114,7 @@ function(configure_cargo_toml cargo_toml_dir CARGO_PROJECT_VERSION CARGO_LIB_NAM
 			${CMAKE_CURRENT_SOURCE_DIR}/cbindgen.toml
 			${CMAKE_CURRENT_SOURCE_DIR}/Cargo.lock
 			${CMAKE_CURRENT_SOURCE_DIR}/rust-toolchain.toml
+			${CMAKE_CURRENT_SOURCE_DIR}/version.txt
 			DESTINATION ${cargo_toml_dir})
 		file(COPY
 			${CMAKE_CURRENT_SOURCE_DIR}/include/zenoh.h

build.rs

@@ -276,15 +276,6 @@ fn cargo_target_dir() -> PathBuf {
 }
 
 fn configure() {
-    let content = format!(
-        r#"#pragma once
-#define TARGET_ARCH_{}
-"#,
-        std::env::var("CARGO_CFG_TARGET_ARCH")
-            .unwrap()
-            .to_uppercase()
-    );
-
     let mut file = std::fs::File::options()
         .write(true)
         .truncate(true)
@@ -293,7 +284,38 @@ fn configure() {
         .open("include/zenoh_configure.h")
         .unwrap();
     file.lock_exclusive().unwrap();
-    file.write_all(content.as_bytes()).unwrap();
+
+    let version = std::fs::read_to_string("version.txt").unwrap();
+    let version = version.trim();
+    let version_parts: Vec<&str> = version.split('.').collect();
+    let major = version_parts[0];
+    let minor = version_parts[1];
+    let patch = version_parts[2];
+    let tweak = version_parts[3];
+    file.write_all(
+        format!(
+            r#"#pragma once
+#define ZENOH_C "{}"
+#define ZENOH_C_MAJOR {}
+#define ZENOH_C_MINOR {}
+#define ZENOH_C_PATCH {}
+#define ZENOH_C_TWEAK {}
+
+#define TARGET_ARCH_{}
+"#,
+            version,
+            major,
+            minor,
+            patch,
+            tweak,
+            std::env::var("CARGO_CFG_TARGET_ARCH")
+                .unwrap()
+                .to_uppercase()
+        )
+        .as_bytes(),
+    )
+    .unwrap();
+
     for (rust_feature, c_feature) in RUST_TO_C_FEATURES.entries() {
         if test_feature(rust_feature) {
             file.write_all(format!("#define {}\n", c_feature).as_bytes())

include/zenoh.h

@@ -10,12 +10,6 @@
 extern "C" {
 #endif
 
-#define ZENOH_C "0.7.2.0"
-#define ZENOH_C_MAJOR 0
-#define ZENOH_C_MINOR 7
-#define ZENOH_C_PATCH 2
-#define ZENOH_C_TWEAK 0
-
 #ifdef _MSC_VER
 #define ALIGN(n) __declspec(align(n))
 #else