build: add scripts to build macOS arm64 packages

.gitignore

@@ -15,3 +15,4 @@ env?
 /rel
 /wheels
 /packages
+/wheelhouse

scripts/build/build_macos_arm64.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+# Build psycopg2-binary wheel packages for Apple M1 (cpNNN-macosx_arm64)
+#
+# This script is designed to run on Scaleway Apple Silicon machines.
+#
+# The script cannot be run as sudo (installing brew fails), but requires sudo,
+# so it can pretty much only be executed by a sudo user as it is.
+
+set -euo pipefail
+set -x
+
+python_versions="3.8.10 3.9.13 3.10.5"
+postgres_version=14
+
+# Move to the root of the project
+dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "${dir}/../../"
+
+# Add /usr/local/bin to the path. It seems it's not, in non-interactive sessions
+if ! (echo $PATH | grep -q '/usr/local/bin'); then
+    export PATH=/usr/local/bin:$PATH
+fi
+
+# Install brew, if necessary. Otherwise just make sure it's in the path
+if [[ -x /opt/homebrew/bin/brew ]]; then
+    eval "$(/opt/homebrew/bin/brew shellenv)"
+else
+    command -v brew > /dev/null || (
+        # Not necessary: already installed
+        # xcode-select --install
+        NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL \
+            https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
+    )
+    eval "$(/opt/homebrew/bin/brew shellenv)"
+fi
+
+# Install PostgreSQL, if necessary
+command -v pg_config > /dev/null || (
+    brew install postgresql@${postgres_version}
+    brew services start postgresql
+)
+
+# Install the Python versions we want to build
+for ver3 in $python_versions; do
+    ver2=$(echo $ver3 | sed 's/\([^\.]*\)\(\.[^\.]*\)\(.*\)/\1\2/')
+    command -v python${ver2} > /dev/null || (
+        (cd /tmp &&
+            curl -fsSl -O \
+                https://www.python.org/ftp/python/${ver3}/python-${ver3}-macos11.pkg)
+        sudo installer -pkg /tmp/python-${ver3}-macos11.pkg -target /
+    )
+done
+
+# Create a virtualenv where to work
+if [[ ! -x .venv/bin/python ]]; then
+    python3 -m venv .venv
+fi
+
+source .venv/bin/activate
+pip install cibuildwheel
+
+# Build the binary packages
+export CIBW_PLATFORM=macos
+export CIBW_ARCHS=arm64
+export CIBW_BUILD='cp{38,39,310}-*'
+export CIBW_TEST_COMMAND='python -c "import tests; tests.unittest.main(defaultTest=\"tests.test_suite\")"'
+
+export PSYCOPG2_TESTDB=postgres
+export PYTHONPATH=$(pwd)
+
+# For some reason, cibuildwheel tests says that psycopg2 is already installed,
+# refuses to install, then promptly fails import. So, please, seriously,
+# install this thing.
+export PIP_FORCE_REINSTALL=1
+
+# Replace the package name
+sed -i .bak 's/^setup(name="psycopg2"/setup(name="psycopg2-binary"/' setup.py
+
+cibuildwheel

scripts/build/run_build_macos_arm64.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Build psycopg2-binary wheel packages for Apple M1 (cpNNN-macosx_arm64)
+#
+# This script is designed to run on a local machine: it will clone the repos
+# remotely and execute the `build_macos_arm64.sh` script remotely, then will
+# download the built packages. A tag to build must be specified.
+#
+# In order to run the script, the `m1` host must be specified in
+# `~/.ssh/config`; for instance:
+#
+#   Host m1
+#     User m1
+#     HostName 1.2.3.4
+
+set -euo pipefail
+# set -x
+
+tag=${1:-}
+
+if [[ ! "${tag}" ]]; then
+    echo "Usage: $0 TAG" >&2
+    exit 2
+fi
+
+rdir=psycobuild
+
+# Clone the repos
+ssh m1 rm -rf "${rdir}"
+ssh m1 git clone https://github.com/psycopg/psycopg2.git --branch ${tag} "${rdir}"
+
+# Allow sudoing without password, to allow brew to install
+ssh -t m1 bash -c \
+    'test -f /etc/sudoers.d/m1 || echo "m1 ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/m1'
+
+# Build the wheel packages
+ssh m1 "${rdir}/scripts/build/build_macos_arm64.sh"
+
+# Transfer the packages locally
+scp -r "m1:${rdir}/wheelhouse" .