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CI: macos-26 + verified Metal for Bazel IPA #6

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Aug 3, 2026
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CI: macos-26 + verified Metal for Bazel IPA #6

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36 changes: 19 additions & 17 deletions .github/workflows/build.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,8 @@ permissions:

jobs:
build:
name: Build IPA (xcode-27)
runs-on: xcode-27
name: Build IPA (macos-26)
runs-on: macos-26
timeout-minutes: 360

env:
Expand Down Expand Up @@ -65,25 +65,27 @@ jobs:
- name: Select Xcode
run: |
set -euo pipefail
if [ -d /Applications/Xcode_27.0.app ]; then
sudo xcode-select -s /Applications/Xcode_27.0.app
elif [ -d /Applications/Xcode.app ]; then
sudo xcode-select -s /Applications/Xcode.app
else
XCODE_VERSION="$(python3 -c 'import json; print(json.load(open("versions.json"))["xcode"])')"
DEVELOPER_DIR="/Applications/Xcode_${XCODE_VERSION}.app/Contents/Developer"
if [ ! -d "$DEVELOPER_DIR" ]; then
CANDIDATE="$(ls -d /Applications/Xcode_26*.app 2>/dev/null | sort -V | tail -1 || true)"
[ -n "$CANDIDATE" ] || { echo "::error::No Xcode found"; exit 1; }
DEVELOPER_DIR="${CANDIDATE}/Contents/Developer"
fi
sudo xcode-select -s "$DEVELOPER_DIR"
# Prefer versions.json (26.2). Xcode 27 preview runners often download Metal
# but xcrun still cannot find `metal` for Bazel MetalCompile.
XCODE_VERSION="$(python3 -c 'import json; print(json.load(open("versions.json"))["xcode"])')"
DEVELOPER_DIR="/Applications/Xcode_${XCODE_VERSION}.app/Contents/Developer"
if [ ! -d "$DEVELOPER_DIR" ]; then
CANDIDATE="$(ls -d /Applications/Xcode_26*.app 2>/dev/null | sort -V | tail -1 || true)"
[ -n "$CANDIDATE" ] || { echo "::error::No Xcode 26.x found"; exit 1; }
DEVELOPER_DIR="${CANDIDATE}/Contents/Developer"
echo "::warning::using $(basename "$CANDIDATE") instead of ${XCODE_VERSION}"
fi
sudo xcode-select -s "$DEVELOPER_DIR"
xcodebuild -version

# Same as decoder-dev/PrivateMusic2 — Xcode 27 runners ship without Metal by default.
# PrivateMusic-style Metal install + xcrun cache reset (Bazel calls `xcrun metal`).
- name: Prepare Metal toolchain
run: sudo xcodebuild -downloadComponent MetalToolchain || true
run: |
set -euo pipefail
sudo xcodebuild -downloadComponent MetalToolchain
rm -f "$(getconf DARWIN_USER_TEMP_DIR)/xcrun_db" || true
xcrun -f metal
xcrun metal -v

- name: Free disk space
run: |
Expand Down
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