[manylinux2014] Split cpython build from build_base image

docker/Dockerfile

@@ -58,10 +58,8 @@ RUN export LIBXCRYPT_VERSION=4.4.17 && \
 
 
 FROM runtime_base AS build_base
-COPY build_scripts/*pubkey*.txt /build_scripts/
-COPY build_scripts/build.sh /build_scripts/
-COPY build_scripts/build_env.sh /build_scripts/
-RUN manylinux-entrypoint bash build_scripts/build.sh
+COPY build_scripts/install-build-packages.sh /build_scripts/
+RUN manylinux-entrypoint /build_scripts/install-build-packages.sh
 
 
 FROM build_base AS build_git
@@ -80,12 +78,18 @@ RUN export CMAKE_VERSION=3.18.3 && \
     manylinux-entrypoint /build_scripts/build-cmake.sh
 
 
+FROM build_base AS build_cpython
+COPY build_scripts/*pubkey*.txt /build_scripts/
+COPY build_scripts/build_env.sh /build_scripts/
+COPY build_scripts/build-cpython.sh /build_scripts/
+RUN manylinux-entrypoint /build_scripts/build-cpython.sh
+
+
 FROM runtime_base
-COPY --from=build_base /manylinux-rootfs /
 COPY --from=build_git /manylinux-rootfs /
 COPY --from=build_cmake /manylinux-rootfs /
-COPY --from=build_base /opt/_internal /opt/_internal/
-COPY build_scripts/build_utils.sh /build_scripts/build_utils.sh
+COPY --from=build_cpython /manylinux-rootfs /
+COPY --from=build_cpython /opt/_internal /opt/_internal/
 COPY build_scripts/finalize.sh /build_scripts/finalize.sh
 COPY build_scripts/python-tag-abi-tag.py /build_scripts/python-tag-abi-tag.py
 COPY build_scripts/ssl-check.py /build_scripts/ssl-check.py

docker/build_scripts/build.sh → docker/build_scripts/build-cpython.sh

@@ -11,14 +11,6 @@ source $MY_DIR/build_env.sh
 # Get build utilities
 source $MY_DIR/build_utils.sh
 
-# Dependencies for compiling Python that we want to remove from
-# the final image after compiling Python
-PYTHON_COMPILE_DEPS="zlib-devel bzip2-devel expat-devel ncurses-devel readline-devel tk-devel gdbm-devel libdb-devel libpcap-devel xz-devel openssl-devel keyutils-libs-devel krb5-devel libcom_err-devel libidn-devel curl-devel perl-devel libffi-devel kernel-devel"
-CMAKE_DEPS="openssl-devel zlib-devel libcurl-devel"
-
-# Development tools and libraries
-yum -y install ${PYTHON_COMPILE_DEPS} ${CMAKE_DEPS}
-
 # Install a more recent SQLite3
 curl -fsSLO $SQLITE_AUTOCONF_DOWNLOAD_URL/$SQLITE_AUTOCONF_ROOT.tar.gz
 check_sha256sum $SQLITE_AUTOCONF_ROOT.tar.gz $SQLITE_AUTOCONF_HASH

docker/build_scripts/install-build-packages.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# Top-level build script called from Dockerfile
+
+# Stop at any error, show all commands
+set -ex
+
+# Set build environment variables
+MY_DIR=$(dirname "${BASH_SOURCE[0]}")
+
+# Dependencies for compiling Python that we want to remove from
+# the final image after compiling Python
+PYTHON_COMPILE_DEPS="zlib-devel bzip2-devel expat-devel ncurses-devel readline-devel tk-devel gdbm-devel libdb-devel libpcap-devel xz-devel openssl-devel keyutils-libs-devel krb5-devel libcom_err-devel libidn-devel curl-devel perl-devel libffi-devel kernel-devel"
+CMAKE_DEPS="openssl-devel zlib-devel libcurl-devel"
+
+# Development tools and libraries
+yum -y install ${PYTHON_COMPILE_DEPS} ${CMAKE_DEPS}