handle DOWNLOAD_RUSTC in src/ci/run.sh

Signed-off-by: onur-ozkan <[email protected]>

Author: onur-ozkan

src/ci/run.sh

@@ -105,6 +105,11 @@ export RUST_RELEASE_CHANNEL=$(releaseChannel)
 RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=$RUST_RELEASE_CHANNEL"
 
 if [ "$DEPLOY$DEPLOY_ALT" = "1" ]; then
+  if [ "$DOWNLOAD_RUSTC" = 1 ]; then
+    echo "ERROR: "DOWNLOAD_RUSTC" should not be set in dist builders!" >&2
+    exit 1
+  fi
+
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-static-stdcpp"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.remap-debuginfo"
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --debuginfo-level-std=1"
@@ -139,6 +144,10 @@ else
     RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-assertions"
   fi
 
+  if [ "$DOWNLOAD_RUSTC" = 1 ]; then
+    RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.download-rustc=if-unchanged"
+  fi
+
   RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.verify-llvm-ir"
 
   # When running gcc backend tests, we need to install `libgccjit` and to not run llvm codegen