From 481a74eda7d004ec4a9992834d098fc0280d2a36 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Wed, 27 Jan 2021 14:21:05 +0100
Subject: Export `CARGO` for proc. macros

---
 crates/project_model/src/build_data.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'crates/project_model')

diff --git a/crates/project_model/src/build_data.rs b/crates/project_model/src/build_data.rs
index cf32995e0..3ff347e2c 100644
--- a/crates/project_model/src/build_data.rs
+++ b/crates/project_model/src/build_data.rs
@@ -175,7 +175,7 @@ fn is_dylib(path: &Path) -> bool {
 /// Should be synced with <https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-sets-for-crates>
 fn inject_cargo_env(package: &cargo_metadata::Package, env: &mut Vec<(String, String)>) {
     // FIXME: Missing variables:
-    // CARGO, CARGO_PKG_HOMEPAGE, CARGO_CRATE_NAME, CARGO_BIN_NAME, CARGO_BIN_EXE_<name>
+    // CARGO_PKG_HOMEPAGE, CARGO_CRATE_NAME, CARGO_BIN_NAME, CARGO_BIN_EXE_<name>
 
     let mut manifest_dir = package.manifest_path.clone();
     manifest_dir.pop();
@@ -183,6 +183,9 @@ fn inject_cargo_env(package: &cargo_metadata::Package, env: &mut Vec<(String, St
         env.push(("CARGO_MANIFEST_DIR".into(), cargo_manifest_dir.into()));
     }
 
+    // Not always right, but works for common cases.
+    env.push(("CARGO".into(), "cargo".into()));
+
     env.push(("CARGO_PKG_VERSION".into(), package.version.to_string()));
     env.push(("CARGO_PKG_VERSION_MAJOR".into(), package.version.major.to_string()));
     env.push(("CARGO_PKG_VERSION_MINOR".into(), package.version.minor.to_string()));
-- 
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