ci/release: Use LLVM from Rust CI, support macOS and Linux ARM

Reflect the changes made to the test CI workflows, including:

- Usage of LLVM from Rust CI.
- Support for macOS and Linux ARM.

Add the disk usage reports as well.

To make sure that the job does not regress, execute it in a "dry run"
mode for each pull request.

Author: vadorovsky

.github/actions/report-disk-usage/action.yml

@@ -0,0 +1,28 @@
+name: Report disk usage
+description: Print disk usage for key directories on the runner
+runs:
+  using: composite
+  steps:
+    - name: Report disk usage
+      shell: bash
+      run: |
+        set -euo pipefail
+
+        printf "\n== Filesystems ==\n"
+        df -h
+
+        report_dir() {
+          local dir="$1"
+          local depth="$2"
+
+          [[ -d "$dir" ]] || return
+
+          printf "\n== %s ==\n" "$dir"
+          sudo -n du -x -h --max-depth="$depth" "$dir" 2>/dev/null | sort -h -r | head -n 20
+        }
+
+        report_dir "${{ github.workspace }}" 2
+        report_dir "$HOME/.cargo" 2
+        report_dir "$HOME/.rustup" 1
+        report_dir /tmp 1
+        report_dir /var/cache/apt/archives 1

.github/workflows/ci.yml

@@ -335,24 +335,4 @@ jobs:
 
       - name: Report disk usage
         if: ${{ always() }}
-        run: |
-          set -euo pipefail
-
-          printf "\n== Filesystems ==\n"
-          df -h
-
-          report_dir() {
-            local dir="$1"
-            local depth="$2"
-
-            [[ -d "$dir" ]] || return
-
-            printf "\n== %s ==\n" "$dir"
-            sudo -n du -x -h --max-depth="$depth" "$dir" 2>/dev/null | sort -h -r | head -n 20
-          }
-
-          report_dir "${{ github.workspace }}" 2
-          report_dir "$HOME/.cargo" 2
-          report_dir "$HOME/.rustup" 1
-          report_dir /tmp 1
-          report_dir /var/cache/apt/archives 1
+        uses: ./.github/actions/report-disk-usage

.github/workflows/release.yml

@@ -1,6 +1,8 @@
 name: Release
 
 on:
+  pull_request:
+
   release:
     types: [published]
 
@@ -9,28 +11,45 @@ jobs:
     uses: ./.github/workflows/llvm.yml
 
   upload-bins:
-    # TODO: Build for macos someday.
-    runs-on: ubuntu-22.04
-    needs: llvm
+    runs-on: ${{ matrix.platform.os }}
+    strategy:
+      matrix:
+        platform:
+          - os: macos-latest
+            target: aarch64-apple-darwin
+          - os: macos-15-intel
+            target: x86_64-apple-darwin
+          - os: ubuntu-22.04
+            target: x86_64-unknown-linux-musl
+            extra-features: deps-link-static
+          - os: ubuntu-22.04-arm
+            target: aarch64-unknown-linux-musl
+            extra-features: deps-link-static
+    env:
+      RUST_CI_LLVM_INSTALL_DIR: /tmp/rustc-llvm
     steps:
-      - name: Restore LLVM
-        uses: actions/cache/restore@v4
-        with:
-          path: llvm-install
-          key: ${{ needs.llvm.outputs.cache-key }}
-          fail-on-cache-miss: true
-
-      - name: Add LLVM to PATH
-        run: |
-          echo "${{ github.workspace }}/llvm-install/bin" >> $GITHUB_PATH
-          echo "$PATH"
-
       - uses: actions/checkout@v5
       - uses: Swatinem/rust-cache@v2
 
+      - name: Install LLVM from Rust CI
+        run: |
+          set -euxo pipefail
+          sudo mkdir -p $RUST_CI_LLVM_INSTALL_DIR
+          rustc_date="$(curl -s https://static.rust-lang.org/dist/channel-rust-nightly-date.txt)"
+          rustc_sha="$(curl -s "https://static.rust-lang.org/dist/$rustc_date/channel-rust-nightly-git-commit-hash.txt")"
+          wget -q -O - "https://ci-artifacts.rust-lang.org/rustc-builds/$rustc_sha/rust-dev-nightly-${{ matrix.platform.target }}.tar.xz" | \
+            sudo tar -xJ --strip-components 2 -C $RUST_CI_LLVM_INSTALL_DIR
+          echo "${RUST_CI_LLVM_INSTALL_DIR}/bin" >> $GITHUB_PATH
+
       - uses: taiki-e/upload-rust-binary-action@v1
         with:
           bin: bpf-linker
-          features: llvm-link-static
+          features: llvm-21,llvm-link-static,${{ matrix.platform.extra-features }}
+          no-default-features: true
+          dry-run: ${{ github.event_name != 'release' }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Report disk usage
+        if: ${{ always() }}
+        uses: ./.github/actions/report-disk-usage