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|
#!/usr/bin/env bash
set -euo pipefail
REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
QUICK=no
DO_COMMIT=no
INSTALL_HOOK=no
DRY_RUN=no
usage() {
cat <<EOF
Sync live system state back into the dotfiles repo.
Usage: $0 [options]
-q, --quick non-interactive, minimal output (used by postsync hook)
-c, --commit git add -A && git commit after syncing
-h, --hook-install write /etc/portage/postsync.d hook (auto after each emerge)
-n, --dry-run show what would change without copying
--help show this help
EOF
}
while [[ $# -gt 0 ]]; do
case "$1" in
-q|--quick) QUICK=yes ;;
-c|--commit) DO_COMMIT=yes ;;
-h|--hook-install) INSTALL_HOOK=yes ;;
-n|--dry-run) DRY_RUN=yes ;;
--help) usage; exit 0 ;;
*) echo "unknown option: $1" >&2; usage >&2; exit 2 ;;
esac
shift
done
log() { printf '\033[1;32m[sync]\033[0m %s\n' "$*"; }
warn() { printf '\033[1;33m[warn]\033[0m %s\n' "$*"; }
root_cp() {
if [[ "$DRY_RUN" == "yes" ]]; then
log " would copy $1 -> $2"
return 0
fi
if [[ $EUID -eq 0 ]]; then
cp "$1" "$2"
elif cp "$1" "$2" 2>/dev/null; then
: # readable as current user — done
elif command -v sudo >/dev/null 2>&1; then
sudo cp "$1" "$2"
else
warn "need root to copy $1"
return 1
fi
}
rsync_portage() {
# -L: dereference symlinks so /etc/portage symlinks back into the repo
# are copied as content, never re-created as self-referencing symlinks.
# Broken symlinks are excluded (rsync -L aborts on dangling referents).
local exfile
exfile="$(mktemp)"
printf '.gitkeep\nmake.profile\n' > "$exfile"
find /etc/portage -type l ! -exec test -e {} \; -printf '%P\n' >> "$exfile"
local -a opts=(-aL --delete "--exclude-from=$exfile")
[[ "$DRY_RUN" == "yes" ]] && opts+=(-n)
log "portage /etc/portage -> repo/portage/etc/portage"
rsync "${opts[@]}" /etc/portage/ "$REPO_DIR/portage/etc/portage/"
rm -f "$exfile"
}
sync_portage() {
rsync_portage
if [[ -e /etc/portage/make.profile ]]; then
log "profile: $(readlink /etc/portage/make.profile)"
if [[ "$DRY_RUN" != "yes" ]]; then
printf '%s\n' "$(readlink /etc/portage/make.profile)" > "$REPO_DIR/portage/PROFILE"
else
log " would write: portage/PROFILE"
fi
fi
log "world /var/lib/portage/world -> repo"
if [[ -L /var/lib/portage/world ]] \
&& [[ "$(readlink -f /var/lib/portage/world)" == "$REPO_DIR/portage/var/lib/portage/world" ]]; then
log " already a symlink into the repo — no copy needed"
else
root_cp /var/lib/portage/world "$REPO_DIR/portage/var/lib/portage/world"
fi
if [[ -s /var/lib/portage/world_sets ]]; then
log "world_sets /var/lib/portage/world_sets -> repo"
root_cp /var/lib/portage/world_sets "$REPO_DIR/portage/var/lib/portage/world_sets"
fi
}
sync_system() {
log "fstab /etc/fstab -> repo/fstab/etc/fstab"
root_cp /etc/fstab "$REPO_DIR/fstab/etc/fstab"
if [[ -f /etc/greetd/config.toml ]]; then
log "greetd /etc/greetd/config.toml -> repo/config.toml"
root_cp /etc/greetd/config.toml "$REPO_DIR/config.toml"
fi
}
install_hook() {
local hook=/etc/portage/postsync.d/update-dotfiles
if [[ "$DRY_RUN" == "yes" ]]; then
log " would write: $hook"
return 0
fi
log "writing $hook"
if [[ $EUID -eq 0 ]]; then
mkdir -p /etc/portage/postsync.d
cat > "$hook" <<EOF
#!/usr/bin/env bash
# generated by update.sh --hook-install — keeps dotfiles fresh after each emerge
exec "$REPO_DIR/update.sh" --quick
EOF
chmod +x "$hook"
elif command -v sudo >/dev/null 2>&1; then
sudo tee "$hook" >/dev/null <<EOF
#!/usr/bin/env bash
# generated by update.sh --hook-install — keeps dotfiles fresh after each emerge
exec "$REPO_DIR/update.sh" --quick
EOF
sudo chmod +x "$hook"
else
warn "need root to write $hook"
fi
}
commit() {
cd "$REPO_DIR"
if [[ -n "$(git status --porcelain)" ]]; then
git add -A
git commit -q -m "sync system state: $(date '+%Y-%m-%d %H:%M')"
log "committed."
else
log "nothing to commit."
fi
}
main() {
if [[ "$DRY_RUN" == "yes" ]]; then
log "dry-run mode — showing changes, nothing written"
fi
sync_portage
sync_system
[[ "$INSTALL_HOOK" == "yes" ]] && install_hook
if [[ "$DO_COMMIT" == "yes" ]]; then
commit
elif [[ "$DRY_RUN" != "yes" && "$QUICK" != "yes" ]]; then
cd "$REPO_DIR"
if [[ -n "$(git status --porcelain)" ]]; then
warn "dotfiles changed — review and commit (or rerun with --commit)."
git status --short
else
log "repo is up to date."
fi
fi
}
main "$@"
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