Bug 1751331 - Use the mozbuild crate in gecko-profiler. r=canaltinova

Differential Revision: https://phabricator.services.mozilla.com/D136566

Cargo.lock

@@ -1874,6 +1874,7 @@ dependencies = [
  "bincode",
  "bindgen",
  "lazy_static",
+ "mozbuild",
  "profiler-macros",
  "serde",
 ]

tools/profiler/rust-api/Cargo.toml

@@ -9,10 +9,12 @@ profiler-macros = { path = "./macros" }
 lazy_static = "1"
 serde = { version = "1.0", features = ["derive"] }
 bincode = "1"
+mozbuild = "0.1"
 
 [build-dependencies]
 lazy_static = "1"
 bindgen = {version = "0.56", default-features = false}
+mozbuild = "0.1"
 
 [features]
 # This feature is being set by Gecko. If it's not set, all public functions and

tools/profiler/rust-api/build.rs

@@ -24,24 +24,16 @@ const BINDINGS_FILE: &str = "bindings.rs";
 lazy_static! {
     static ref BINDGEN_FLAGS: Vec<String> = {
         // Load build-specific config overrides.
-        let path = PathBuf::from(env::var_os("MOZ_TOPOBJDIR").unwrap())
-            .join("tools/profiler/rust-api/extra-bindgen-flags");
+        let path = mozbuild::TOPOBJDIR.join("tools/profiler/rust-api/extra-bindgen-flags");
         println!("cargo:rerun-if-changed={}", path.to_str().unwrap());
         fs::read_to_string(path).expect("Failed to read extra-bindgen-flags file")
             .split_whitespace()
             .map(std::borrow::ToOwned::to_owned)
             .collect()
     };
-    static ref DISTDIR_PATH: PathBuf = {
-        let path = PathBuf::from(env::var_os("MOZ_TOPOBJDIR").unwrap());
-        if !path.is_absolute() || !path.is_dir() {
-            panic!("MOZ_TOPOBJDIR must be an absolute directory, was: {}", path.display());
-        }
-        path.join("dist")
-    };
     static ref SEARCH_PATHS: Vec<PathBuf> = vec![
-        DISTDIR_PATH.join("include"),
-        DISTDIR_PATH.join("include/nspr"),
+        mozbuild::TOPOBJDIR.join("dist/include"),
+        mozbuild::TOPOBJDIR.join("dist/include/nspr"),
     ];
 }
 

tools/profiler/rust-api/src/gecko_bindings/profiling_categories.rs

@@ -8,9 +8,8 @@
 //! `mozglue/baseprofiler/generate_profiling_categories.py`, from
 //! 'mozglue/baseprofiler/core/profiling_categories.yaml`.
 
-include!(concat!(
-    env!("MOZ_TOPOBJDIR"),
-    "/tools/profiler/rust-api/src/gecko_bindings/profiling_categories.rs"
+include!(mozbuild::objdir_path!(
+    "tools/profiler/rust-api/src/gecko_bindings/profiling_categories.rs"
 ));
 
 /// Helper macro that returns the profiling category pair from either only