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MochiOS Team
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Initial mochios repo: full source tree, pkgbuilds, archiso profile, and CI workflow
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‎.github/workflows/build.yml‎

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name: Build MochiOS ISO
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on:
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push:
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branches: [main, master]
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pull_request:
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branches: [main, master]
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workflow_dispatch:
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jobs:
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build:
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runs-on: ubuntu-latest
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container:
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image: archlinux:latest
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options: --privileged
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steps:
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- name: Checkout
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uses: actions/checkout@v4
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- name: Setup Arch Linux
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run: |
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pacman-key --init
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pacman-key --populate archlinux
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echo "Server = https://mirror.rackspace.com/archlinux/\$repo/os/\$arch" > /etc/pacman.d/mirrorlist
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pacman -Sy --noconfirm
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- name: Install build dependencies
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run: |
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pacman -S --needed --noconfirm \
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archiso \
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base-devel \
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sudo \
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go \
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python \
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python-urwid \
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squashfs-tools \
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dosfstools \
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mtools \
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openssl \
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zstd \
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fakeroot \
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debugedit
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- name: Create mochi user with passwordless sudo
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run: |
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useradd -m mochi
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echo "mochi ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
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chown -R mochi:mochi /home/mochi
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- name: Create GPG signing key
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run: |
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mkdir -p /home/mochi/.mochios-gnupg
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chmod 700 /home/mochi/.mochios-gnupg
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printf 'Key-Type: RSA\nKey-Length: 4096\nSubkey-Type: RSA\nSubkey-Length: 4096\nName-Real: MochiOS CI Signing Key\nName-Email: ci@mochios.dev\nExpire-Date: 0\n%%no-protection\n%%commit\n' | gpg --homedir /home/mochi/.mochios-gnupg --batch --gen-key
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mkdir -p repo/pubkey
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gpg --homedir /home/mochi/.mochios-gnupg --export --armor ci@mochios.dev > repo/pubkey/mochios-key.pub
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- name: Build packages
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run: |
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chmod +x build.sh
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# Override paths for CI (we're at /__w/mochios/mochios or similar)
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export MOCHIOS_DIR="$PWD"
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export REPO_DIR="$PWD/repo"
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export OUT_DIR="$PWD/out"
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export ISO_DIR="$PWD/archiso-mochios"
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export WORK_DIR="/tmp/mochios-work"
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export GNUPGHOME="/home/mochi/.mochios-gnupg"
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export SIGN_KEY="ci@mochios.dev"
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bash build.sh 2>&1
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- name: List ISO output
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run: |
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ls -lh out/*.iso 2>/dev/null || echo "No ISO found"
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ls -lh repo/os/x86_64/ 2>/dev/null || echo "No packages found"
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- name: Upload ISO artifact
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uses: actions/upload-artifact@v4
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with:
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name: mochios-iso
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path: out/*.iso
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retention-days: 30
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- name: Upload packages artifact
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uses: actions/upload-artifact@v4
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with:
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name: mochios-packages
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path: repo/os/x86_64/*.pkg.tar.zst
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retention-days: 30

‎.gitignore‎

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# Build outputs
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out/
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*.iso
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*.pkg.tar.zst
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*.sig
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pkg/
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src/
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# OS junk
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Thumbs.db
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.DS_Store
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# IDE
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.vscode/
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.idea/
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*.swp
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*.swo
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# Secrets
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privkey.pem
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**/privkey.pem
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*.key
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**/*.key
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# GPG
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.mochios-gnupg/
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# Temp
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/tmp/
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*.tmp
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# Generated tarballs (CI regenerates)
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pkgbuilds/mochi/*.tar.gz
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pkgbuilds/mochiinstall/*.tar.gz
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pkgbuilds/mochi-abroot/*.tar.gz
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pkgbuilds/mochios-defaults/*.tar.gz
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pkgbuilds/mochios-branding/*.tar.gz

‎abroot.sh‎

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#!/bin/bash
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# abroot - A/B root atomic update manager for mochios
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# manages two root subvolumes (root_a, root_b) on btrfs
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set -euo pipefail
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CONF="${CONF:-/etc/abroot.conf}"
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if [ -f "$CONF" ]; then
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source "$CONF"
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fi
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ROOT_PART="${ROOT_PART:-/dev/mapper/mochios-root}"
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BTRFS_MOUNT="${BTRFS_MOUNT:-/mnt/btrfs}"
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ACTIVE_ROOT="${ACTIVE_ROOT:-root_a}"
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NEXT_ROOT="${NEXT_ROOT:-root_b}"
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mount_btrfs() {
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if ! mountpoint -q "$BTRFS_MOUNT"; then
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mkdir -p "$BTRFS_MOUNT"
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mount "$ROOT_PART" "$BTRFS_MOUNT"
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fi
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}
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mount_chroot() {
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local target="$1"
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mkdir -p "$target"
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mount --bind "$BTRFS_MOUNT/$NEXT_ROOT" "$target"
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mount --bind /dev "$target/dev"
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mount --bind /proc "$target/proc"
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mount --bind /sys "$target/sys"
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if mountpoint -q /boot 2>/dev/null; then
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mkdir -p "$target/boot"
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mount --bind /boot "$target/boot"
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fi
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}
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umount_chroot() {
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local target="$1"
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umount "$target/dev" 2>/dev/null || true
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umount "$target/proc" 2>/dev/null || true
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umount "$target/sys" 2>/dev/null || true
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umount "$target/boot" 2>/dev/null || true
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umount "$target" 2>/dev/null || true
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}
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status() {
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mount_btrfs
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echo "active: $ACTIVE_ROOT"
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echo "next: $NEXT_ROOT"
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echo "---"
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btrfs subvolume list "$BTRFS_MOUNT" 2>/dev/null || true
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echo "---"
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ls "$BTRFS_MOUNT/snapshots/" 2>/dev/null || echo "no snapshots"
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}
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deploy() {
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mount_btrfs
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local snapshot="$BTRFS_MOUNT/snapshots/$(date +%Y%m%d_%H%M%S)_$ACTIVE_ROOT"
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mkdir -p "$BTRFS_MOUNT/snapshots"
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echo "creating snapshot: $(basename "$snapshot")"
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btrfs subvolume snapshot -r "$BTRFS_MOUNT/$ACTIVE_ROOT" "$snapshot"
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echo "updating $NEXT_ROOT..."
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btrfs subvolume delete "$BTRFS_MOUNT/$NEXT_ROOT" 2>/dev/null || true
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btrfs subvolume snapshot "$BTRFS_MOUNT/$ACTIVE_ROOT" "$BTRFS_MOUNT/$NEXT_ROOT"
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local target="/mnt/next"
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mount_chroot "$target"
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echo "running pacman in $NEXT_ROOT..."
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if [ $# -eq 0 ]; then
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arch-chroot "$target" pacman --noconfirm -Syu
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else
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arch-chroot "$target" pacman --noconfirm -S "$@"
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fi
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umount_chroot "$target"
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echo "update deployed to $NEXT_ROOT"
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echo "reboot and select $NEXT_ROOT to apply"
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}
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rollback() {
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mount_btrfs
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local latest
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latest=$(ls -t "$BTRFS_MOUNT/snapshots/" 2>/dev/null | head -1)
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if [ -z "$latest" ]; then
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echo "no snapshots found"
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exit 1
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fi
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echo "rolling back to: $latest"
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echo "WARNING: this will DELETE the current $ACTIVE_ROOT subvolume"
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if [ "${1:--}" != "-f" ] && [ "${1:--}" != "--force" ]; then
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read -rp "are you sure? [y/N] " confirm
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case "$confirm" in
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[yY]*) ;;
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*) echo "rollback cancelled"; exit 1 ;;
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esac
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fi
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btrfs subvolume delete "$BTRFS_MOUNT/$ACTIVE_ROOT"
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btrfs subvolume snapshot "$BTRFS_MOUNT/snapshots/$latest" "$BTRFS_MOUNT/$ACTIVE_ROOT"
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echo "rolled back to $latest"
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}
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case "${1:-status}" in
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status)
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status
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;;
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deploy)
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shift
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deploy "$@"
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;;
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rollback)
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shift
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rollback "$@"
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;;
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list-snapshots|snapshot)
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mount_btrfs
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echo "snapshots:"
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ls -lt "$BTRFS_MOUNT/snapshots/" 2>/dev/null || echo "no snapshots"
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;;
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*)
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echo "usage: abroot {status|deploy|rollback|snapshot}"
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exit 1
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;;
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esac

‎airootfs/etc/mkinitcpio.conf.d/mochios.conf‎

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# mochios mkinitcpio preset
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MODULES=(ata_piix ahci nvme)
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HOOKS=(base udev autodetect modconf kms keyboard keymap consolefont block encrypt filesystems fsck)

‎airootfs/etc/mochios-release‎

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MOCHIOS_BUILD_ID="rolling"
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MOCHIOS_BUILD_DATE="$(date +%Y-%m-%d)"
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MOCHIOS_VERSION="0.1.0"

‎airootfs/etc/sddm.conf.d/autologin.conf‎

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[Autologin]
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User=mochi
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Session=plasma.desktop

‎airootfs/etc/sddm.conf.d/mochios.conf‎

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[Theme]
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Current=mochios

‎airootfs/etc/sudoers.d/10-mochi-live‎

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# mochi user passwordless sudo for live environment
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mochi ALL=(ALL:ALL) NOPASSWD: ALL

‎airootfs/home/mochi/.config/autostart/mochi-wallpaper.desktop‎

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[Desktop Entry]
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Type=Application
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Name=MochiOS Wallpaper
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Comment=Set MochiOS wallpaper
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Exec=mochi-wallpaper light
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Terminal=false
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X-KDE-autostart-phase=2
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NoDisplay=true

‎airootfs/home/mochi/.config/autostart/mochiinstall.desktop‎

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[Desktop Entry]
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Type=Application
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Name=MochiOS Installer
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Comment=Install MochiOS to your system
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Exec=konsole -e mochiinstall
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Terminal=false
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Categories=System;
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X-KDE-autostart-phase=2
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X-KDE-autostart-after=panel
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