Switch Zephyr nightly workflow to self-hosted runner

.github/workflows/zephyr-nightly.yml

@@ -1,7 +1,8 @@
 name: Zephyr Nightly with ELD
 
 on:
-  # pull_request: {} # Uncomment only to test this WF file update.
+  # FIXME: recomment
+  pull_request: {} # Uncomment only to test this WF file update.
   schedule:
     - cron: '0 9 * * *'
   workflow_dispatch:
@@ -12,7 +13,7 @@ permissions:
 jobs:
   zephyr-build-and-test:
     if: github.repository == 'qualcomm/eld' || github.event_name == 'workflow_dispatch'
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     env:
       ZEPHYR_WORKSPACE: ${{ github.workspace }}/zephyrproject
 
@@ -22,30 +23,16 @@ jobs:
         with:
           path: llvm-project/llvm/tools/eld
 
-      - name: Record pre-build entry
-        if: github.event_name == 'schedule'
-        uses: ./llvm-project/llvm/tools/eld/.github/workflows/BuildStatusDataRecorder
-        with:
-          enabled: true
-          project: "llvm-project/llvm/tools/eld"
-          stage: "pre-"
-          workflow-name: "zephyr"
-          record-mode: "record"
-          status: "fail"
-          run-id: ${{github.run_id}}
-          arch-name: "riscv32"
-          branch-name: "main"
-
-      - name: Install dependencies
+      - name: Clean workspace
         run: |
-          export DEBIAN_FRONTEND=noninteractive
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends \
-            libc++-dev libc++abi-dev libclang-rt-20-dev \
-            git cmake ninja-build gperf dfu-util device-tree-compiler wget \
-            python3-dev python3-pip python3-setuptools python3-tk python3-venv python3-wheel xz-utils \
-            file make gcc gcc-multilib g++-multilib libsdl2-dev libmagic1 qemu-system-riscv32
+          rm -rf ${{ env.ZEPHYR_WORKSPACE }}
+          rm -rf ${{ github.workspace }}/zephyr-sdk-*
+          rm -rf ${{ github.workspace }}/.cmake
 
+      - name: Set up Zephyr workspace
+        env:
+          HOME: ${{ github.workspace }}
+        run: |
           python3 -m venv ${{ env.ZEPHYR_WORKSPACE }}/.venv
           . ${{ env.ZEPHYR_WORKSPACE }}/.venv/bin/activate
           python -m pip install -U pip
@@ -65,42 +52,69 @@ jobs:
         run: |
           echo "ZEPHYR_VENV=${{ env.ZEPHYR_WORKSPACE }}/.venv" >> $GITHUB_ENV
 
-      - name: Install Zephyr SDK
+      # FIXME: remove once wget issue is understood
+      - name: Debug wget
+        run: |
+          echo "=== wget version ==="
+          wget --version 2>&1 | head -3
+          echo ""
+          echo "=== wget verbose download test ==="
+          wget -v -O /dev/null --max-redirect=5 \
+            "https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v1.0.0/toolchain_gnu_linux-x86_64_riscv64-zephyr-elf.tar.xz" \
+            2>&1 | head -30 || true
+          echo ""
+          echo "=== wget with -N (as setup.sh uses) ==="
+          cd /tmp
+          wget -q --show-progress -N \
+            "https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v1.0.0/toolchain_gnu_linux-x86_64_riscv64-zephyr-elf.tar.xz" \
+            2>&1 | head -10 || echo "EXIT CODE: $?"
+          rm -f /tmp/toolchain_gnu_linux-x86_64_riscv64-zephyr-elf.tar.xz
+
+      - name: Install Zephyr SDK and RISC-V toolchain
+        env:
+          HOME: ${{ github.workspace }}
         run: |
-          cd ${{ env.ZEPHYR_WORKSPACE }}
           . ${{ env.ZEPHYR_WORKSPACE }}/.venv/bin/activate
-          west sdk install -t riscv64-zephyr-elf
 
-      - name: Install RISC-V toolchain payload
-        run: |
+          # Install minimal SDK (this works fine)
+          cd ${{ env.ZEPHYR_WORKSPACE }}
+          west sdk install
+
           SDK_DIR=$(ls -d "$HOME"/zephyr-sdk-* 2>/dev/null | head -n 1)
           if [ -z "$SDK_DIR" ]; then
             echo "Failed to locate Zephyr SDK under $HOME"
             ls -la "$HOME" || true
             exit 1
           fi
-          cd "$SDK_DIR"
-          ./setup.sh -t riscv64-zephyr-elf
 
-          PICOLIBC_SYSROOT=${SDK_DIR}/riscv64-zephyr-elf/picolibc
-          PICOLIBC_LIB_DIR=${PICOLIBC_SYSROOT}/riscv64-zephyr-elf/lib/rv32imac_zicsr_zifencei/ilp32
-          GCC_INSTALL_DIR=${PICOLIBC_SYSROOT}/lib/gcc/riscv64-zephyr-elf/12.2.0
+          # setup.sh -t fails on self-hosted runners; download toolchain manually
+          SDK_VERSION=$(basename "$SDK_DIR" | sed 's/zephyr-sdk-//')
+          TOOLCHAIN_URL="https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v${SDK_VERSION}/toolchain_gnu_linux-x86_64_riscv64-zephyr-elf.tar.xz"
+          echo "Downloading $TOOLCHAIN_URL"
+          curl -L "$TOOLCHAIN_URL" -o /tmp/riscv64-toolchain.tar.xz
+          tar xf /tmp/riscv64-toolchain.tar.xz -C "$SDK_DIR"
+          rm /tmp/riscv64-toolchain.tar.xz
 
-          if [ ! -d "$PICOLIBC_SYSROOT" ]; then
-            echo "Failed to locate picolibc sysroot: $PICOLIBC_SYSROOT"
-            find "${SDK_DIR}/riscv64-zephyr-elf" -maxdepth 2 -type d || true
-            exit 1
-          fi
-
-          if [ ! -d "$PICOLIBC_LIB_DIR" ]; then
-            echo "Failed to locate picolibc multilib dir: $PICOLIBC_LIB_DIR"
-            find "${PICOLIBC_SYSROOT}/riscv64-zephyr-elf/lib" -maxdepth 4 -type d || true
-            exit 1
-          fi
-
-          if [ ! -d "$GCC_INSTALL_DIR" ]; then
-            echo "Failed to locate gcc install dir: $GCC_INSTALL_DIR"
-            find "${PICOLIBC_SYSROOT}/lib/gcc/riscv64-zephyr-elf" -maxdepth 3 -type d || true
+          # Register SDK
+          cd "$SDK_DIR"
+          ./setup.sh -h
+
+          TOOLCHAIN_DIR=$SDK_DIR/gnu/riscv64-zephyr-elf
+          PICOLIBC_SYSROOT=${TOOLCHAIN_DIR}/riscv64-zephyr-elf
+          PICOLIBC_LIB_DIR=${PICOLIBC_SYSROOT}/lib/rv32imac_zicsr_zifencei/ilp32
+          GCC_INSTALL_DIR=$(ls -d "${TOOLCHAIN_DIR}/lib/gcc/riscv64-zephyr-elf"/* 2>/dev/null | head -n 1)
+
+          for DIR in "$TOOLCHAIN_DIR" "$PICOLIBC_SYSROOT" "$PICOLIBC_LIB_DIR"; do
+            if [ ! -d "$DIR" ]; then
+              echo "ERROR: directory not found: $DIR"
+              find "$SDK_DIR" -maxdepth 5 -type d || true
+              exit 1
+            fi
+          done
+
+          if [ -z "$GCC_INSTALL_DIR" ] || [ ! -d "$GCC_INSTALL_DIR" ]; then
+            echo "ERROR: gcc install dir not found under: ${TOOLCHAIN_DIR}/lib/gcc/"
+            find "$TOOLCHAIN_DIR/lib/gcc" -maxdepth 3 -type d || true
             exit 1
           fi
 
@@ -156,7 +170,6 @@ jobs:
           ./scripts/twister -W -p qemu_riscv32 \
             --inline-logs \
             --timestamps \
-            -j 2 \
             -v \
             -x ZEPHYR_SDK_INSTALL_DIR=${{ env.ELD_SDK_DIR }} \
             -x ZEPHYR_TOOLCHAIN_VARIANT=llvm \
@@ -202,3 +215,10 @@ jobs:
           run-id: ${{github.run_id}}
           arch-name: "riscv32"
           branch-name: "main"
+
+      - name: Clean workspace
+        if: always()
+        run: |
+          rm -rf ${{ env.ZEPHYR_WORKSPACE }}
+          rm -rf ${{ github.workspace }}/zephyr-sdk-*
+          rm -rf ${{ github.workspace }}/.cmake