Refactor kernel configuration and build steps in Makefile CI

Author: andrewmcwatters

.github/workflows/makefile.yml

@@ -40,25 +40,13 @@ jobs:
       run: sudo apt-get install -y libelf-dev
 
     # https://docs.kernel.org/admin-guide/README.html#build-directory-for-the-kernel
-    # https://docs.kernel.org/admin-guide/README.html#configuring-the-kernel
-    - name: Configure the kernel
+    - name: Configure and build the kernel
       if: steps.cache-kernel.outputs.cache-hit != 'true'
       run: |
         cd ${{ env.VERSION }}
-        make defconfig
-
-    # https://docs.kernel.org/admin-guide/README.html#compiling-the-kernel
-    - name: Compile the kernel
-      if: steps.cache-kernel.outputs.cache-hit != 'true'
-      run: |
-        cd ${{ env.VERSION }}
-        make
-
-    - name: Build root filesystem
-      run: |
-        mkdir -p iso/boot
-        pwd
-        ls -l
+        make O=${{ github.workspace }}/iso/boot menuconfig
+        make O=${{ github.workspace }}/iso/boot
+        sudo make O=${{ github.workspace }}/iso/boot modules_install install
 
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html
     # https://docs.kernel.org/filesystems/ramfs-rootfs-initramfs.html#contents-of-initramfs
@@ -78,13 +66,6 @@ jobs:
         gcc -static hello.c -o initramfs/init
         (cd initramfs; find . | cpio -o -H newc | gzip) > iso/boot/initramfs.cpio.gz
 
-    - name: Install the kernel
-      run: |
-        cd ${{ env.VERSION }}
-        install $(make -s image_name) ../iso/boot/vmlinuz
-        install System.map ../iso/boot/System.map
-        install .config ../iso/boot/config
-
     # https://www.gnu.org/software/grub/manual/grub/html_node/Making-a-GRUB-bootable-CD_002dROM.html
     - name: Make a GRUB bootable CD-ROM
       run: |