ci: cross-compile with crafter-build instead of pmbootstrap chroots

The pmbootstrap approach needed the privileged pmos runner, which only
fp6-img can reach. This repo already had the right flow: make-sysroot.sh
+ crafter-build --target=aarch64-alpine-linux-musl + APKBUILD.binary —
unprivileged, so it runs in an alpine:edge container on the ordinary
arch-latest runner, and minutes instead of qemu-chroot hours. The test
suite runs natively; the aarch64 binaries are further exercised by
fp6-img's chroot 'make check' whenever an image builds.

APKBUILD.binary gains the pmOS integration payload the canonical aport
ships (systemd subpackage, enable preset, wants symlink, config-gated
drop-in, kde-modem-daemon skel override) — required before this pipeline
may publish a version users upgrade to, or the upgrade would strip those
files. pkgver now follows implementations/main.cpp (sed'd by the CI, and
bumped to 0.3.1 in the file).

packaging/APKBUILD.binary

@@ -1,12 +1,16 @@
 # SPDX-License-Identifier: GPL-3.0-only
 # SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
 # Maintainer: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
-# Interim packaging: wraps a crafter-build binary cross-compiled on a dev box
-# (see README "Cross-compiling") into a proper apk, so the daemon is
-# apk-managed on the phone while crafter-build itself isn't packaged for
-# Alpine yet. The source tarball is produced by packaging/make-bin-tarball.sh.
+# Binary packaging: wraps a crafter-build binary cross-compiled per the
+# README's "Cross-compiling" section into a proper apk — used by this repo's
+# package CI (packaging/build-package.sh, which also seds pkgver from
+# implementations/main.cpp) and runnable by hand. The source tarball is
+# produced by packaging/make-bin-tarball.sh; the desktop/preset files come
+# from packaging/aport/ (copy them next to this file). The package payload
+# must stay identical to packaging/aport/APKBUILD's, or an apk upgrade
+# across the two pipelines would add/strip files on users' phones.
 pkgname=imsd
-pkgver=0.3.0
+pkgver=0.3.1
 pkgrel=0
 pkgdesc="Userspace IMS/VoLTE daemon for mainline Linux phones"
 url="https://forgejo.catcrafts.net/Catcrafts/imsd"
@@ -19,8 +23,15 @@ depends="modemmanager libc++ opencore-amr vo-amrwbenc pipewire-tools"
 # which races imsd for the PDN and flaps it with a new prefix every ~2.5 min
 # (fp6 journal/ims.md s57) — the two IMS stacks cannot share one PDN
 provides="81voltd=$pkgver-r$pkgrel"
-options="!check"
-source="imsd-$pkgver.tar.gz"
+# no OpenRC service yet: the unit's PDN-bring-up/env-file sequencing is only
+# tested under systemd; an initd is welcome once someone can verify one
+subpackages="$pkgname-systemd"
+options="!check !tracedeps"
+source="
+	imsd-$pkgver.tar.gz
+	org.kde.modem.daemon.desktop
+	80-imsd.preset
+"
 
 package() {
     cd "$srcdir/imsd-$pkgver"
@@ -33,4 +44,26 @@ package() {
         "$pkgdir"/etc/xdg/autostart/imsd-dialerd.desktop
     install -Dm644 net.catcrafts.IMS1.conf \
         "$pkgdir"/usr/share/dbus-1/system.d/net.catcrafts.IMS1.conf
+    # the skel override hides kde-telephony's modem daemon autostart for the
+    # account created at install — imsd-dialerd owns those session bus names
+    install -Dm644 "$srcdir"/org.kde.modem.daemon.desktop \
+        "$pkgdir"/etc/skel/.config/autostart/org.kde.modem.daemon.desktop
+    # enabled by preset: the unit is a no-op until /etc/imsd.env exists, and
+    # VoLTE surviving reboots must not depend on a manual systemctl enable
+    install -Dm644 "$srcdir"/80-imsd.preset \
+        "$pkgdir"/usr/lib/systemd/system-preset/80-imsd.preset
+    mkdir -p "$pkgdir"/etc/systemd/system/multi-user.target.wants
+    ln -s /usr/lib/systemd/system/imsd.service \
+        "$pkgdir"/etc/systemd/system/multi-user.target.wants/imsd.service
+    # ...but only actually start once the carrier config exists, so
+    # unconfigured systems don't boot into a failing unit
+    mkdir -p "$pkgdir"/usr/lib/systemd/system/imsd.service.d
+    printf '[Unit]\nConditionPathExists=/etc/imsd.env\n' \
+        > "$pkgdir"/usr/lib/systemd/system/imsd.service.d/10-require-config.conf
+}
+
+systemd() {
+    install_if="$pkgname=$pkgver-r$pkgrel systemd"
+
+    amove usr/lib/systemd/system
 }

packaging/build-package.sh

@@ -1,115 +1,111 @@
 #!/bin/sh -eu
 # SPDX-License-Identifier: GPL-3.0-only
 # SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
-# CI package build: produce the imsd apk(s) for aarch64 from THIS checkout,
-# using packaging/aport/ (the canonical aport) and pmbootstrap's cross
-# chroots. Runs in CI inside an Alpine container on the privileged "pmos"
-# runner (qemu-user binfmt on the host for the aarch64 chroots); also
-# runnable in any Alpine environment with the same privileges
-# (IMSD_NO_CROSSDIRECT=1 for hosts where crossdirect's /native bridge
-# breaks — the build then runs qemu-only, slower, identical output).
+# CI package build: cross-compile imsd for aarch64 with crafter-build (the
+# README's "Cross-compiling" flow), run the test suite natively, and package
+# the result via packaging/APKBUILD.binary. Expects an x86_64 Alpine
+# environment with root — the workflow runs it in an alpine:edge job
+# container on an ordinary runner. Root only installs packages and hands off
+# to a scratch user: the sysroot is built with apk.static --usermode (which
+# refuses root) and abuild wants a user too.
 #
-# Built packages land in ~build/.local/var/pmbootstrap/packages/*/aarch64/;
-# the workflow's publish step uploads the imsd*.apk ones to the Forgejo
-# Alpine registry.
+# Built packages land in /home/build/.local/share/abuild/*/aarch64/imsd*.apk;
+# the workflow's publish step uploads them to the Forgejo Alpine registry.
 
 set -eu
 
-PMAPORTS_REPO=https://gitlab.postmarketos.org/postmarketOS/pmaports.git
+# The musl build of crafter-build (Crafter.Build CI's release-musl job):
+# this container is Alpine, and the glibc launcher cannot run on musl. v2 =
+# SSE4.2 baseline: the CI box is an Intel N5105 (no AVX). Overridable for
+# local rehearsals (file:// works).
+CRAFTER_URL=${CRAFTER_URL:-https://forgejo.catcrafts.net/Catcrafts/Crafter.Build/releases/download/latest/crafter-build-linux-x86_64-musl-v2.tar.gz}
+
 SRC=$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)
 
-# pmbootstrap refuses to run as root: install deps, then re-exec as a build
-# user with passwordless sudo (pmbootstrap escalates itself where needed).
+# clang cross-targets aarch64 natively and the target's libc++/glib come from
+# the sysroot; llvm-runtimes/libc++-dev/glib-dev here serve the NATIVE
+# test-suite run. build-base = Alpine's standard build environment (the one
+# abuild implies): binutils' ld/ar for clang's default link driver, gcc's
+# libgcc_s/crt objects the musl clang driver links against.
 if [ "$(id -u)" = 0 ]; then
-	apk add -q git sudo python3 py3-pip multipath-tools util-linux tar
-	# pmbootstrap pinned from git: Alpine's package is older. The pmOS
-	# gitlab hiccups under crawler load; a failure costs a retry, not the run
-	for _i in 1 2 3; do
-		pip install -q --break-system-packages \
-			git+https://gitlab.postmarketos.org/postmarketOS/pmbootstrap.git@3.11.1 \
-			&& break
-		if [ "$_i" = 3 ]; then
-			echo "pmbootstrap pip install failed after 3 attempts" >&2
-			exit 1
-		fi
-		echo "pmbootstrap pip install failed (attempt $_i/3), retrying in 15s..." >&2
-		sleep 15
-	done
-	# containers cannot modprobe; make pmbootstrap's 'sudo modprobe' a no-op
-	# (/usr/local/sbin precedes /sbin in sudo's secure_path)
-	mkdir -p /usr/local/sbin
-	printf '#!/bin/sh\nexit 0\n' > /usr/local/sbin/modprobe
-	chmod +x /usr/local/sbin/modprobe
+	apk add -q git curl tar clang lld llvm llvm-runtimes libc++-dev llvm-libunwind-dev glib-dev \
+		build-base abuild sudo
 	id build >/dev/null 2>&1 || adduser -D build
+	addgroup build abuild 2>/dev/null || true
 	echo 'build ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/build
-	# su scrubs the environment — carry the knobs that matter across it
-	exec su build -c "IMSD_NO_CROSSDIRECT='${IMSD_NO_CROSSDIRECT:-}' sh -eu '$SRC/packaging/build-package.sh'"
+	# abuild in cross mode strips with $CHOST-strip; llvm-strip handles any
+	# ELF arch, so give it that name
+	ln -sf "$(command -v llvm-strip)" /usr/local/bin/aarch64-alpine-linux-musl-strip
+	# the CI checkout arrives root-owned; crafter-build writes bin/ into it
+	chown -R build "$SRC"
+	# -l: a login shell, so HOME really is /home/build (abuild keys + output);
+	# it scrubs the environment, so carry the one knob that matters across
+	exec su -l build -c "CRAFTER_URL='${CRAFTER_URL:-}' sh -eu '$SRC/packaging/build-package.sh'"
 fi
 
-# the CI checkout is root-owned; let git read it as the build user
-git config --global --add safe.directory "$SRC"
-
-# git hosts occasionally hiccup; a clone failure costs a retry, not the run
-clone_retry() { # clone_retry <dest> <git clone args...>
-	_dest=$1; shift
-	for _i in 1 2 3; do
-		rm -rf "$_dest"
-		git clone "$@" "$_dest" && return 0
-		echo "git clone $_dest failed (attempt $_i/3), retrying in 10s..." >&2
-		sleep 10
-	done
-	echo "git clone $_dest failed after 3 attempts" >&2
-	return 1
-}
-
 retry() { # retry <description> <cmd...>
 	_desc=$1; shift
 	for _i in 1 2 3; do
 		"$@" && return 0
-		echo "$_desc failed (attempt $_i/3), retrying in 30s..." >&2
-		sleep 30
+		echo "$_desc failed (attempt $_i/3), retrying in 15s..." >&2
+		sleep 15
 	done
 	echo "$_desc failed after 3 attempts" >&2
 	return 1
 }
 
-# pmbootstrap swallows its subcommands' stderr into its own log; surface it
-# whenever this script dies so failures are diagnosable from CI output alone
-trap 'rc=$?; if [ $rc -ne 0 ]; then
-	echo "=== build-package.sh failed (exit $rc); pmbootstrap log tail ==="
-	tail -60 "$HOME/.local/var/pmbootstrap/log.txt" 2>/dev/null || true
-fi' EXIT
+# implementations/main.cpp is the version's single source of truth (same
+# derivation as make-bin-tarball.sh)
+VER=$(sed -n 's/.*char\* Version = "\(.*\)".*/\1/p' "$SRC/implementations/main.cpp")
+[ -n "$VER" ] || { echo "cannot read Version from implementations/main.cpp" >&2; exit 1; }
+echo ">> packaging imsd $VER"
 
-# --- pmaports with our aport dropped in; source tarball from this checkout
-# (the Forgejo instance serves no source archives, so git-archive it)
-WORK=${IMSD_PKG_WORK:-$HOME/imsd-pkg-work}
-rm -rf "$WORK"
-mkdir -p "$WORK"
-clone_retry "$WORK/pmaports" -q --depth=1 "$PMAPORTS_REPO"
-mkdir -p "$WORK/pmaports/modem"
-cp -r "$SRC/packaging/aport" "$WORK/pmaports/modem/imsd"
-COMMIT=$(git -C "$SRC" rev-parse --short HEAD)
-git -C "$SRC" archive --prefix=imsd/ \
-	-o "$WORK/pmaports/modem/imsd/imsd-$COMMIT.tar.gz" HEAD
-sed -i "s/^_commit=.*/_commit=\"$COMMIT\"/" "$WORK/pmaports/modem/imsd/APKBUILD"
+# --- crafter-build: static launcher from the rolling release
+mkdir -p "$HOME/crafter-build"
+retry "fetch crafter-build" \
+	sh -c "curl -fsSL '$CRAFTER_URL' | tar -xz -C '$HOME/crafter-build'"
+PATH="$HOME/crafter-build/bin:$PATH"
+export CRAFTER_BUILD_HOME="$HOME/crafter-build/share/crafter-build"
 
-# --- configure pmbootstrap (config written directly; 'init' is interactive)
-WORKDIR="$HOME/.local/var/pmbootstrap"
-mkdir -p "$WORKDIR/cache_git"
-python3 -c "import pmb.config; print(pmb.config.work_version)" > "$WORKDIR/version"
-mkdir -p "$HOME/.config"
-cat > "$HOME/.config/pmbootstrap_v3.cfg" <<EOF
-[pmbootstrap]
-aports = $WORK/pmaports
-device = fairphone-fp6
-ui = console
-systemd = always
-EOF
+# --- aarch64 Alpine sysroot (unprivileged: apk.static --usermode)
+SYSROOT="$HOME/.cache/imsd/sysroot-aarch64-alpine"
+retry "make sysroot" "$SRC/packaging/make-sysroot.sh" "$SYSROOT"
 
-NOCROSS=${IMSD_NO_CROSSDIRECT:+--no-cross}
+# --- cross-compile the products; run the suites natively (same sources,
+# host arch — the aarch64 binaries are additionally exercised by fp6-img's
+# chroot `make check` whenever an image builds)
+cd "$SRC"
+XTARGET="--target=aarch64-alpine-linux-musl --sysroot=$SYSROOT --march=armv8-a --mtune=generic"
+crafter-build -- $XTARGET
+crafter-build -- --product=media $XTARGET
+crafter-build -- --product=dialerd $XTARGET
+crafter-build test
 
-pmbootstrap checksum imsd
-retry "build imsd" pmbootstrap $NOCROSS build --arch aarch64 imsd
+# --- bundle + package
+./packaging/make-bin-tarball.sh "$VER"
+
+PKG="$HOME/pkg"
+rm -rf "$PKG"
+mkdir -p "$PKG"
+cp "$SRC/packaging/APKBUILD.binary" "$PKG/APKBUILD"
+cp "$SRC/packaging/aport/org.kde.modem.daemon.desktop" \
+   "$SRC/packaging/aport/80-imsd.preset" "$PKG/"
+mv "imsd-$VER.tar.gz" "$PKG/"
+sed -i "s/^pkgver=.*/pkgver=$VER/" "$PKG/APKBUILD"
+# a throwaway signing key: phones trust the registry-signed APKINDEX, not
+# per-package keys (same situation as fp6-img's pmbootstrap-built packages).
+# abuild >= 3.18 keeps keys under ~/.config/abuild and output under
+# ~/.local/share/abuild (REPODEST default).
+abuild-keygen -a -n >/dev/null 2>&1
+sudo cp "$HOME"/.config/abuild/*.rsa.pub /etc/apk/keys/
+# CHOST puts abuild in cross mode so arch="aarch64" packages on this x86_64
+# host. -d skips dependency handling entirely: nothing compiles under abuild
+# (with -r, cross mode would try to install a nonexistent build-base-aarch64
+# plus the runtime depends); !tracedeps in the APKBUILD keeps abuild from
+# resolving the aarch64 ELF NEEDED entries against this x86_64 host.
+cd "$PKG"
+abuild checksum
+CHOST=aarch64 abuild -d
 
 echo "=== built packages ==="
-ls -la "$WORKDIR"/packages/*/aarch64/imsd*.apk
+ls -la "$HOME"/.local/share/abuild/*/aarch64/imsd*.apk