1 files changed, 37 insertions, 0 deletions

diff --git a/.github/ci/build-xtensa.sh b/.github/ci/build-xtensa.sh
new file mode 100755
index 000000000..a13391c82
--- /dev/null
+++ b/.github/ci/build-xtensa.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+## on push branch~=gh-readonly-queue/main/.*
+## on pull_request
+
+set -euo pipefail
+
+export RUSTUP_HOME=/ci/cache/rustup
+export CARGO_HOME=/ci/cache/cargo
+export CARGO_TARGET_DIR=/ci/cache/target
+
+# needed for "dumb HTTP" transport support
+# used when pointing stm32-metapac to a CI-built one.
+export CARGO_NET_GIT_FETCH_WITH_CLI=true
+
+cargo install espup
+/ci/cache/cargo/bin/espup install
+
+# Restore lockfiles
+if [ -f /ci/cache/lockfiles.tar ]; then
+    echo Restoring lockfiles...
+    tar xf /ci/cache/lockfiles.tar
+fi
+
+hashtime restore /ci/cache/filetime.json || true
+hashtime save /ci/cache/filetime.json
+
+mkdir .cargo
+cat > .cargo/config.toml<< EOF
+[unstable]
+build-std = ["alloc", "core"]
+EOF
+
+./ci-xtensa.sh
+
+# Save lockfiles
+echo Saving lockfiles...
+find . -type f -name Cargo.lock -exec tar -cf /ci/cache/lockfiles.tar '{}' \+