Improved Buildroot CI build speed by providing precompiled Buildroot images. (#332)

Signed-off-by: RICCIARDI-Adrien <adrien.ricciardi@hotmail.fr>

1 files changed, 17 insertions, 58 deletions

diff --git a/.github/workflows/buildroot.yaml b/.github/workflows/buildroot.yaml
index 3429d17..a131f94 100644
--- a/.github/workflows/buildroot.yaml
+++ b/.github/workflows/buildroot.yaml
@@ -3,70 +3,29 @@ on: [push, pull_request]
 
 jobs:
   buildroot:
-    runs-on: ubuntu-latest
+    name: Buildroot
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         defconfig_name: [qemu_x86_defconfig, qemu_x86_64_defconfig, raspberrypi4_defconfig, raspberrypi4_64_defconfig, qemu_ppc64le_pseries_defconfig, qemu_mips32r2_malta_defconfig, qemu_mips64_malta_defconfig]
         libc_name: [glibc, uclibc, musl]
+    env:
+      PPP_CI_VERSION: v1.0
+      BUILDROOT_DIRECTORY_NAME: buildroot-${{ matrix.defconfig_name }}-${{ matrix.libc_name }}
     steps:
-      - name: Checkout Buildroot sources
-        run: git clone --depth=1 --branch=2021.02.3 https://git.busybox.net/buildroot
-      - name: Select latest PPP version
-        working-directory: buildroot/package/pppd
+      - name: Retrieve prebuilt Buildroot image...
+        working-directory: /home/runner
         run: |
-          # Allow package to build when musl libc is selected
-          sed -i '/depends on !BR2_TOOLCHAIN_USES_MUSL/d' Config.in
-          # Upstream version always needs OpenSSL
-          sed -i '/select BR2_PACKAGE_OPENSSL/c\\select BR2_PACKAGE_OPENSSL' Config.in
-          # Do not check for package hash, so there is no need to compute it
-          rm pppd.hash
-          # Buildroot patch is already applied upstream
-          rm -f 0001-pppd-Fix-bounds-check.patch
-          # Get package sources from head of master branch
-          sed -i "/PPPD_VERSION =/c\\PPPD_VERSION = ${GITHUB_SHA}" pppd.mk
-          sed -i '/PPPD_SITE =/c\\PPPD_SITE = https://github.com/ppp-project/ppp' pppd.mk
-          sed -i '9iPPPD_SITE_METHOD = git' pppd.mk
-          # Tell Buildroot to run autoreconf.sh
-          sed -i '16iPPPD_AUTORECONF = YES' pppd.mk
-          # Filters feature needs libpcap
-          sed -i '17iPPPD_DEPENDENCIES = libpcap openssl' pppd.mk
-          # Enable verbose build commands and force OpenSSL directory, otherwise the host system one might be used instead of Buildroot one
-          sed -i '18iPPPD_CONF_OPTS = --disable-silent-rules --with-openssl="$(STAGING_DIR)/usr"' pppd.mk
-          # Do not install build artifacts to staging directory
-          sed -i 's/PPPD_INSTALL_STAGING = YES/PPPD_INSTALL_STAGING = NO/' pppd.mk
-          # Delete custom configuration tool, it is now automatically handled by Buildroot
-          sed -i '/PPPD_CONFIGURE_CMDS/,+4d' pppd.mk
-          # Delete custom build rule, it is now generated by Autotools
-          sed -i '/define PPPD_BUILD_CMDS/,+4d' pppd.mk
-          # Delete custom installation to target rule, it is now generated by Autotools
-          sed -i '/define PPPD_INSTALL_TARGET_CMDS/,+27d' pppd.mk
-          # Delete custom staging installation rule as PPP does not need to be installed to staging in this CI
-          sed -i '/define PPPD_INSTALL_STAGING_CMDS/,+3d' pppd.mk
-          # Tell Buildroot that this package uses Autotools
-          sed -i 's/$(eval $(generic-package))/$(eval $(autotools-package))/' pppd.mk
-      - name: Enable PPP build
-        working-directory: buildroot
+          wget https://github.com/ppp-project/ppp-ci/releases/download/${{ env.PPP_CI_VERSION }}/${{ env.BUILDROOT_DIRECTORY_NAME }}.tar.zst
+          tar -xf ${{ env.BUILDROOT_DIRECTORY_NAME }}.tar.zst
+      - name: Select latest PPP upstream version
+        working-directory: /home/runner/${{ env.BUILDROOT_DIRECTORY_NAME }}/package/pppd
         run: |
-          # Enable all Buildroot PPP options as everything is built by upstream build system
-          echo "BR2_PACKAGE_PPPD=y" >> configs/${{ matrix.defconfig_name }}
-          echo "BR2_PACKAGE_PPPD_FILTER=y" >> configs/${{ matrix.defconfig_name }}
-          echo "BR2_PACKAGE_PPPD_RADIUS=y" >> configs/${{ matrix.defconfig_name }}
-          echo "BR2_PACKAGE_PPPD_OVERWRITE_RESOLV_CONF=y" >> configs/${{ matrix.defconfig_name }}
-      - name: Select glibc
-        if: ${{ matrix.libc_name == 'glibc' }}
-        working-directory: buildroot
-        run: echo "BR2_TOOLCHAIN_BUILDROOT_GLIBC=y" >> configs/${{ matrix.defconfig_name }}
-      - name: Select uClibc
-        if: ${{ matrix.libc_name == 'uclibc' }}
-        working-directory: buildroot
-        run: echo "BR2_TOOLCHAIN_BUILDROOT_UCLIBC=y" >> configs/${{ matrix.defconfig_name }}
-      - name: Select musl
-        if: ${{ matrix.libc_name == 'musl' }}
-        working-directory: buildroot
-        run: echo "BR2_TOOLCHAIN_BUILDROOT_MUSL=y" >> configs/${{ matrix.defconfig_name }}
-      - name: Configure Buildroot
-        working-directory: buildroot
-        run: make ${{ matrix.defconfig_name }}
+          # Get package sources from head of current branch
+          sed -i "/PPPD_VERSION =/c\\PPPD_VERSION = ${GITHUB_SHA}" pppd.mk
+      - name: Trigger a PPP package rebuild
+        working-directory: /home/runner/${{ env.BUILDROOT_DIRECTORY_NAME }}/output/build
+        run: rm -rf pppd*
       - name: Build
-        working-directory: buildroot
+        working-directory: /home/runner/${{ env.BUILDROOT_DIRECTORY_NAME }}
         run: make