Unix crossbuild scripts and docs (#2326)

* can build now with cargo cross

platform/crossbuild/README.md

@@ -0,0 +1,40 @@
+# Cross-building things using cargo cross
+
+Here be dragons.
+
+1. Get a drink. You'l need it.
+2. Install [cargo-cross](https://github.com/cross-rs/cross)
+3. Drink the drink.
+
+## Building Ubuntu 20.04 things
+
+Make sure you're including `--release` because reasons.
+
+```shell
+CROSS_CONFIG=platform/crossbuild/ubuntu-20.04/Cross.toml \
+    cross build --target aarch64-unknown-linux-gnu \
+        --bin kanidm_unixd \
+        --bin kanidm_unixd_tasks \
+        --bin kanidm_ssh_authorizedkeys \
+        --bin kanidm-unix \
+        --release
+```
+
+Things will end up in `./target/aarch64-unknown-linux-gnu/release/`
+
+## Building Ubuntu 22.04 things
+
+Make sure you're including `--release` because reasons.
+
+```shell
+CROSS_CONFIG=platform/crossbuild/ubuntu-22.04/Cross.toml \
+    cross build --target aarch64-unknown-linux-gnu \
+        --bin kanidm_unixd \
+        --bin kanidm_unixd_tasks \
+        --bin kanidm_ssh_authorizedkeys \
+        --bin kanidm-unix \
+        --release
+
+```
+
+Things will end up in `./target/aarch64-unknown-linux-gnu/release/`

platform/crossbuild/build.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+set -e
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 target_os"
+    if [ -d ./platform ]; then
+        echo "Options:"
+        find platform/crossbuild -type d -maxdepth 1 -mindepth 1 | awk -F'/' '{print $NF}' | sort
+    fi
+    exit 1
+fi
+
+if [ ! -d "platform/crossbuild/$1" ]; then
+    echo "Could not find platform/crossbuild/$1"
+    exit 1
+fi
+
+TARGET_DIR="./target/$1"
+
+echo "Recreating then building to ${TARGET_DIR}"
+rm -rf "${TARGET_DIR}"
+mkdir -p "${TARGET_DIR}"
+
+CROSS_CONFIG="platform/crossbuild/${1}/Cross.toml" \
+    cross build --target aarch64-unknown-linux-gnu \
+        --bin kanidm_unixd \
+        --bin kanidm_unixd_tasks \
+        --bin kanidm_ssh_authorizedkeys \
+        --bin kanidm-unix \
+        --release
+
+find "./target/aarch64-unknown-linux-gnu/release/" -maxdepth 1 \
+    -type f -not -name '*.d' \
+    -name 'kanidm*' \
+    -exec mv "{}" "${TARGET_DIR}/" \;
+# find "${TARGET_DIR}" -name '*.d' -delete
+
+echo "Contents of ${TARGET_DIR}"
+find "${TARGET_DIR}" -type f

platform/crossbuild/ubuntu-20.04/Cross.toml

@@ -0,0 +1,18 @@
+[build.env]
+
+
+[target.aarch64-unknown-linux-gnu]
+dockerfile = "platform/crossbuild/ubuntu-20.04/Dockerfile"
+pre-build = [
+    "TZ=UTC ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone",
+
+    "apt-get update && apt-get install --assume-yes libssl-dev build-essential",
+
+    # "sed 's/^deb http/deb [arch=amd64] http/' -i '/etc/apt/sources.list'",
+    # "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy main restricted universe multiverse' >> /etc/apt/sources.list",
+    # "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-updates main restricted universe multiverse' >> /etc/apt/sources.list",
+    # "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-backports main restricted universe multiverse' >> /etc/apt/sources.list",do
+
+    "dpkg --add-architecture $CROSS_DEB_ARCH",
+    "apt-get update && apt-get install --assume-yes libssl-dev:$CROSS_DEB_ARCH  libpam0g-dev:$CROSS_DEB_ARCH libudev-dev:$CROSS_DEB_ARCH pkg-config:$CROSS_DEB_ARCH",
+]

platform/crossbuild/ubuntu-20.04/Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:20.04
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install --assume-yes --no-install-recommends \
+    g++-aarch64-linux-gnu \
+    libc6-dev-arm64-cross
+
+ENV CROSS_TOOLCHAIN_PREFIX=aarch64-linux-gnu-
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    AR_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"ar \
+    CC_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    CXX_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"g++ \
+    RUST_TEST_THREADS=1 \
+    PKG_CONFIG_PATH="/usr/lib/aarch64-linux-gnu/pkgconfig/:${PKG_CONFIG_PATH}"

platform/crossbuild/ubuntu-22.04/Cross.toml

@@ -0,0 +1,17 @@
+[build.env]
+
+[target.aarch64-unknown-linux-gnu]
+dockerfile = "platform/crossbuild/ubuntu-22.04/Dockerfile"
+pre-build = [
+    "TZ=UTC ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone",
+
+    "apt-get update && apt-get install --assume-yes rsync libssl-dev build-essential",
+
+    "sed 's/^deb http/deb [arch=amd64] http/' -i '/etc/apt/sources.list'",
+    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy main restricted universe multiverse' >> /etc/apt/sources.list",
+    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-updates main restricted universe multiverse' >> /etc/apt/sources.list",
+    "echo 'deb [arch=arm64] http://au.archive.ubuntu.com/pub/ubuntu/ports jammy-backports main restricted universe multiverse' >> /etc/apt/sources.list",
+
+    "dpkg --add-architecture $CROSS_DEB_ARCH",
+    "apt-get update && apt-get install --assume-yes libssl-dev:$CROSS_DEB_ARCH  libpam0g-dev:$CROSS_DEB_ARCH libudev-dev:$CROSS_DEB_ARCH pkg-config:$CROSS_DEB_ARCH",
+]

platform/crossbuild/ubuntu-22.04/Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:22.04
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install --assume-yes --no-install-recommends \
+    g++-aarch64-linux-gnu \
+    libc6-dev-arm64-cross
+
+ENV CROSS_TOOLCHAIN_PREFIX=aarch64-linux-gnu-
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    AR_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"ar \
+    CC_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    CXX_aarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"g++ \
+    RUST_TEST_THREADS=1 \
+    PKG_CONFIG_PATH="/usr/lib/aarch64-linux-gnu/pkgconfig/:${PKG_CONFIG_PATH}"

platform/debian/Makefile

@@ -1,3 +1,6 @@
+ARCH ?= $(dpkg --print-architecture)
+
+
 .DEFAULT: help
 
 .PHONY: help
@@ -7,17 +10,17 @@ help:
 .PHONY: debs/kanidm
 debs/kanidm: ## Build the Kanidm CLI package - make sure you set the environment variable KANIDM_BUILD_PROFILE
 debs/kanidm:
-	bash ./platform/debian/build_kanidm.sh kanidm
+	ARCH=$(ARCH) bash ./platform/debian/build_kanidm.sh kanidm
 
 .PHONY: debs/kanidmd
 debs/kanidmd: ## Build the Kanidmd package - make sure you set the environment variable KANIDM_BUILD_PROFILE
 debs/kanidmd:
-	bash ./platform/debian/build_kanidm.sh kanidmd
+	ARCH=$(ARCH) bash ./platform/debian/build_kanidm.sh kanidmd
 
 .PHONY: debs/kanidm-unixd
 debs/kanidm-unixd: ## Build the Kanidm UNIX tools package (PAM/NSS, unixd and related tools) - make sure you set the environment variable KANIDM_BUILD_PROFILE
 debs/kanidm-unixd:
-	bash ./platform/debian/build_kanidm.sh kanidm-unixd
+	ARCH=$(ARCH) bash ./platform/debian/build_kanidm.sh kanidm-unixd
 
 .PHONY: debs/all
 debs/all: ## Build all the .deb packages - make sure you set the environment variable KANIDM_BUILD_PROFILE

platform/debian/build_kanidm.sh

@@ -4,6 +4,17 @@
 
 set -e
 
+if [ -z "${ARCH}" ]; then
+    ARCH="$(dpkg --print-architecture)"
+fi
+
+if [ "${ARCH}" -ne "$(dpkg --print-architecture)" ]; then
+    echo "${ARCH} -ne $(dpkg --print-architecture), cross-compiling!"
+    export PKG_CONFIG_ALLOW_CROSS=1
+
+fi
+
+
 if [ -z "$1" ]; then
     PACKAGE="kanidm"
 else

platform/debian/kanidm-unixd/rules

@@ -25,6 +25,7 @@ override_dh_auto_clean:
 override_dh_autoreconf:
 
 override_dh_auto_build:
+	# this runs "make -- release/${PACKAGE} release/kanidm-ssh"
 	KANIDM_BUILD_PROFILE=release_suse_generic dh_auto_build -- release/${PACKAGE} release/kanidm-ssh
 
 override_dh_auto_test:

unix_integration/Cargo.toml

@@ -77,7 +77,15 @@ serde_json = { workspace = true }
 sketching = { workspace = true }
 
 toml = { workspace = true }
-tokio = { workspace = true, features = ["rt", "fs", "macros", "sync", "time", "net", "io-util"] }
+tokio = { workspace = true, features = [
+    "rt",
+    "fs",
+    "macros",
+    "sync",
+    "time",
+    "net",
+    "io-util",
+] }
 tokio-util = { workspace = true, features = ["codec"] }
 tracing = { workspace = true }
 uuid = { workspace = true }