move build.rs and friends to pbs-buildcfg

with this the main crate won't be re-compiled every time a
*binary* is modified

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

pbs-buildcfg/Cargo.toml

@@ -4,5 +4,6 @@ version = "0.1.0"
 authors = ["Proxmox Support Team <support@proxmox.com>"]
 edition = "2018"
 description = "macros used for pbs related paths such as configdir and rundir"
+build = "build.rs"
 
 [dependencies]

pbs-buildcfg/build.rs

@@ -0,0 +1,24 @@
+// build.rs
+use std::env;
+use std::process::Command;
+
+fn main() {
+    let repoid = match env::var("REPOID") {
+        Ok(repoid) => repoid,
+        Err(_) => {
+            match Command::new("git")
+                .args(&["rev-parse", "HEAD"])
+                .output()
+            {
+                Ok(output) => {
+                    String::from_utf8(output.stdout).unwrap()
+                }
+                Err(err) => {
+                    panic!("git rev-parse failed: {}", err);
+                }
+            }
+        }
+    };
+
+    println!("cargo:rustc-env=REPOID={}", repoid);
+}

pbs-buildcfg/src/lib.rs

@@ -1,5 +1,15 @@
 //! Exports configuration data from the build system
 
+pub const PROXMOX_PKG_VERSION: &str =
+    concat!(
+        env!("CARGO_PKG_VERSION_MAJOR"),
+        ".",
+        env!("CARGO_PKG_VERSION_MINOR"),
+    );
+pub const PROXMOX_PKG_RELEASE: &str = env!("CARGO_PKG_VERSION_PATCH");
+pub const PROXMOX_PKG_REPOID: &str = env!("REPOID");
+
+
 /// The configured configuration directory
 pub const CONFIGDIR: &str = "/etc/proxmox-backup";
 pub const JS_DIR: &str = "/usr/share/javascript/proxmox-backup";