ci: remove buildkit support (#1667)

.travis.yml

@@ -1,6 +1,13 @@
 language: c
 os: linux
 dist: focal
+addons:
+  apt:
+    sources:
+      - sourceline: 'deb https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable'
+        key_url: 'https://download.docker.com/linux/ubuntu/gpg'
+    packages:
+    - docker-ce docker-ce-cli containerd.io docker-buildx-plugin
 services:
   - docker
 
@@ -59,11 +66,10 @@ before_install:
   - if [ -d "${HOME}/buildx-cache/.buildx-cache-${POLICY}_${PLATFORM}" ]; then cp -rlf ${HOME}/buildx-cache/.buildx-cache-${POLICY}_${PLATFORM} ./; fi
 
 install:
-  - uptime
-  - nproc
-  - free
-  - cat /proc/cpuinfo
-  - ./travisci-install-buildx.sh
+  - docker version
+  - docker buildx version
+  - docker buildx create --name builder-manylinux --driver docker-container --use
+  - docker buildx inspect --bootstrap --builder builder-manylinux 2>&1 | tee /dev/null
 
 script: |
   BUILD_STATUS=success
@@ -88,7 +94,3 @@ deploy:
   on:
     branch: main
     repo: pypa/manylinux
-
-after_script:
-  - if [ -f ${HOME}/dockerd-rootless.pid ]; then kill -15 $(cat ${HOME}/dockerd-rootless.pid); fi
-  - if [ -f /tmp/buildkitd.pid ]; then sudo kill -15 $(cat /tmp/buildkitd.pid); fi

build.sh

@@ -99,17 +99,6 @@ elif [ "${MANYLINUX_BUILD_FRONTEND}" == "docker-buildx" ]; then
 		--cache-from=type=local,src=$(pwd)/.buildx-cache-${POLICY}_${PLATFORM} \
 		--cache-to=type=local,dest=$(pwd)/.buildx-cache-staging-${POLICY}_${PLATFORM},mode=max \
 		${BUILD_ARGS_COMMON}
-elif [ "${MANYLINUX_BUILD_FRONTEND}" == "buildkit" ]; then
-	USE_LOCAL_CACHE=1
-	buildctl build \
-		--frontend=dockerfile.v0 \
-		--local context=./docker/ \
-		--local dockerfile=./docker/ \
-		--import-cache type=local,src=$(pwd)/.buildx-cache-${POLICY}_${PLATFORM} \
-		--export-cache type=local,dest=$(pwd)/.buildx-cache-staging-${POLICY}_${PLATFORM},mode=max \
-		--opt build-arg:POLICY=${POLICY} --opt build-arg:PLATFORM=${PLATFORM} --opt build-arg:BASEIMAGE=${BASEIMAGE} \
-		--opt "build-arg:DEVTOOLSET_ROOTPATH=${DEVTOOLSET_ROOTPATH}" --opt "build-arg:PREPEND_PATH=${PREPEND_PATH}" --opt "build-arg:LD_LIBRARY_PATH_ARG=${LD_LIBRARY_PATH_ARG}" \
-		--output type=docker,name=quay.io/pypa/${POLICY}_${PLATFORM}:${COMMIT_SHA} | docker load
 else
 	echo "Unsupported build frontend: '${MANYLINUX_BUILD_FRONTEND}'"
 	exit 1