Remind to run trustsight before building AUR updates

Add a pacman hook that runs update-notify for each logged-in user with the timer active, and a path unit that users can point at their local repo databases to refresh after aur build.

.gitignore

@@ -0,0 +1 @@
+CLAUDE.md

PKGBUILD

@@ -2,33 +2,32 @@
 
 # Maintainer: Daniele Fucini <dfucini [at] gmail [dot] com>
 
-pkgname=update-notify-git
+pkgname=update-notify
-_pkgname=update-notify
+pkgver=3.7
-pkgdesc='Notify when updates are available'
-pkgver=0.0.1
 pkgrel=1
-url="https://github.com/Fuxino/${_pkgname}"
+pkgdesc='Notify when updates are available'
 arch=('any')
-license=('GPL3')
+url="https://git.shouldnt.work/fuxino/$pkgname"
+license=('GPL-3.0-or-later')
+depends=('pacman-contrib'
+         'libnotify')
 makedepends=('git')
-depends=('rsync')
+optdepends=('aurutils: to check AUR packages in the local repo for updates'
-source=(git+${url}.git?signed#branch=master)
+            'fwupd: to check for firmware updates'
+            'git-monitor: to check git repos for updates')
+source=("git+$url?signed#tag=$pkgver")
 validpgpkeys=('7E12BC1FF3B6EDB2CD8053EB981A2B2A3BBF5514')
-sha256sums=('SKIP')
+sha256sums=('89ffddcb3fc0b82fdaec61defb374127d720655c35f2157cfe0d543360df22ab')
-
-pkgver() 
-{  
-    cd ${_pkgname}
-    git describe --long --tags | sed 's/\([^-]*-g\)/r\1/;s/-/./g'
-}
-
-prepare()
-{
-    git -C ${srcdir}/${_pkgname} clean -dfx
-}
 
 package()
 {
-    cd ${srcdir}/${_pkgname}
+    cd "$srcdir"/"$pkgname"
-    install -Dm755 ${_pkgname} ${pkgdir}/usr/bin/${_pkgname}
+    install -Dm755 "$pkgname" "$pkgdir"/usr/bin/"$pkgname"
+    install -Dm644 "$pkgname".service "$pkgdir"/usr/lib/systemd/user/"$pkgname".service
+    install -Dm644 "$pkgname".timer "$pkgdir"/usr/lib/systemd/user/"$pkgname".timer
+    install -Dm644 "$pkgname".path "$pkgdir"/usr/lib/systemd/user/"$pkgname".path
+    install -Dm755 "$pkgname"-refresh "$pkgdir"/usr/lib/"$pkgname"/refresh
+    install -Dm644 "$pkgname".hook "$pkgdir"/usr/share/libalpm/hooks/"$pkgname".hook
+    install -Dm644 README.md "$pkgdir"/usr/share/doc/"$pkgname"/README.md
+    install -Dm644 config.example "$pkgdir"/usr/share/doc/"$pkgname"/config.example
 }

README.md

@@ -0,0 +1,110 @@
+# update-notify
+
+Desktop notifications for pending updates on Arch Linux.
+
+update-notify runs on a systemd user timer and checks:
+
+- **Repo updates**, using `checkupdates` from pacman-contrib.
+- **AUR updates** for packages in a local aurutils repository (`aur repo -u`).
+- **Custom kernel rebuilds**: when a stock kernel (e.g. `linux-lts`) has a newer version than your custom build of it (e.g. `linux-lts-custom`).
+
+It sends one notification, and only when its content changes since the last one:
+
+- Update counts are shown once the total number of updates reaches a threshold (default 30). Reminders for `git-monitor` and pending firmware updates (`fwupdmgr`) are added when those tools are installed, and one to run `trustsight` before building pending AUR updates.
+- Kernel rebuild reminders are always shown, even below the threshold.
+
+## Requirements
+
+- `pacman-contrib`
+- `libnotify` and a running notification daemon
+
+Optional:
+
+- `aurutils`: check AUR packages in the local repository
+- `fwupd`: check for firmware updates
+- `git-monitor`: remind to check git packages
+- `trustsight`: remind to vet AUR updates before building them
+
+## Installation
+
+Build and install the package with the included PKGBUILD:
+
+```
+makepkg -si
+```
+
+Or, with aurutils, build it into your local repository with `aur build` and install it with pacman.
+
+Then enable the timer:
+
+```
+systemctl --user enable --now update-notify.timer
+```
+
+The timer runs 5 minutes after boot, then every 6 hours.
+
+A pacman hook also runs update-notify after every pacman transaction, for each logged-in user whose timer is active, so the notification and the status bar file are current right after an upgrade.
+
+### Refresh after building packages
+
+Building into a local repository (`aur build`, `aur sync`) doesn't run pacman, so the hook can't catch it. To run update-notify whenever a repository changes, add the repository files to watch to `update-notify.path`:
+
+```
+systemctl --user edit update-notify.path
+```
+
+```
+[Path]
+PathChanged=/home/aur-local/aur-local.db.tar.gz.sig
+PathChanged=/home/custom-pkgs/custom-pkgs.db.tar.gz.sig
+```
+
+Watch the `.db.tar.gz.sig` file for signed repositories, or `.db.tar.gz` for unsigned ones (`.db` is a symlink). Then enable it:
+
+```
+systemctl --user enable --now update-notify.path
+```
+
+## Usage
+
+```
+update-notify [threshold]
+```
+
+`threshold` is the minimum number of updates (repo + AUR) before update counts are shown. It overrides the `THRESHOLD` setting below.
+
+## Configuration
+
+Settings are read from `$XDG_CONFIG_HOME/update-notify/config` (default `~/.config/update-notify/config`), a bash file that is sourced by the script. All settings are optional:
+
+- `THRESHOLD`: minimum number of updates before update counts are shown (default 30).
+- `AUR_REPO`: name of the local aurutils repository (default `aur-local`).
+- `KERNELS`: maps each stock kernel package to its custom build (default: `linux`, `linux-lts` and `linux-zen` to `<name>-custom`). Kernels where either package isn't installed are skipped. Set `KERNELS=()` to disable the kernel check.
+
+A commented sample config is installed with the package. To start from it:
+
+```
+mkdir -p ~/.config/update-notify
+cp /usr/share/doc/update-notify/config.example ~/.config/update-notify/config
+```
+
+Kernel versions are compared without `pkgrel`, so a stock packaging-only update doesn't trigger a rebuild reminder. A custom build already in the local repository but not installed yet counts as up to date.
+
+The content of the last notification is stored in `$XDG_STATE_HOME/update-notify` (default `~/.local/state/update-notify`). Delete it to get the current notification again.
+
+## Status bars
+
+Each run also writes the pending updates to `$XDG_STATE_HOME/update-notify/pending`, whether or not the threshold is reached, for status bars such as xmobar to read:
+
+```
+threshold 30
+repo <pkg> <newver>
+aur <pkg> <newver>
+kernel <custom-pkg> <stock-ver>
+```
+
+The file reflects the last run, which the pacman hook and `update-notify.path` keep close to current. To keep a bar current in between, drop entries whose installed version (`pacman -Q`) is no longer older than `newver`, or, for `kernel` lines, whose custom build has caught up with `stock-ver` (ignoring `pkgrel`). This only reads local data, so it's cheap to run often.
+
+## License
+
+GPL-3.0-or-later. See [LICENSE](LICENSE).

config.example

@@ -0,0 +1,19 @@
+# update-notify configuration, sourced as bash.
+# Copy to ~/.config/update-notify/config and uncomment what you want to change.
+# The values shown are the defaults.
+
+# Minimum number of updates (repo + AUR) before update counts are shown.
+# The command-line argument takes precedence.
+#THRESHOLD=30
+
+# Name of the local aurutils repository.
+#AUR_REPO="aur-local"
+
+# Stock kernel package -> your custom build of it. Replaces the whole list;
+# kernels where either package isn't installed are skipped.
+# Set KERNELS=() to disable the kernel check.
+#KERNELS=(
+#    [linux]="linux-custom"
+#    [linux-lts]="linux-lts-custom"
+#    [linux-zen]="linux-zen-custom"
+#)

update-notify

@@ -1,16 +1,196 @@
 #!/bin/bash
+set -u
 
-if [ "$#" -eq 1 ]; then
+# ---------------------------------------------------------------------------
-    threshold=$1
+# Config: defaults, overridden by the config file, then by the argument
+# ---------------------------------------------------------------------------
+THRESHOLD=30
+AUR_REPO="aur-local"
+# stock kernel package -> your custom build of it
+declare -A KERNELS=(
+    [linux]="linux-custom"
+    [linux-lts]="linux-lts-custom"
+    [linux-zen]="linux-zen-custom"
+)
+config_file="${XDG_CONFIG_HOME:-$HOME/.config}/update-notify/config"
+state_dir="${XDG_STATE_HOME:-$HOME/.local/state}/update-notify"
+
+if [[ -r $config_file ]]; then
+    # shellcheck source=/dev/null
+    source "$config_file"
+fi
+THRESHOLD=${1:-$THRESHOLD}
+
+[[ $THRESHOLD =~ ^[0-9]+$ ]] || { echo "Threshold must be a number" >&2; exit 1; }
+THRESHOLD=$((10#$THRESHOLD))  # force base 10, so e.g. "08" isn't read as octal
+mkdir -p "$state_dir"
+
+# notify-send from cron/systemd needs the session bus address
+export DBUS_SESSION_BUS_ADDRESS="${DBUS_SESSION_BUS_ADDRESS:-unix:path=/run/user/$(id -u)/bus}"
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+# Send a notification only if its body changed since last time for this key.
+notify_once() {
+    local key=$1 title=$2 body=$3
+    local file="$state_dir/$key"
+    if [[ -f $file && $(<"$file") == "$body" ]]; then
+        return 0
+    fi
+    notify-send "$title" "$body" && printf '%s' "$body" > "$file"
+}
+
+# Forget a key so the next occurrence notifies again.
+clear_state() {
+    rm -f "$state_dir/$1"
+}
+
+# If $1 has a pending update, print its new version and return 0.
+# checkupdates lines look like: "pkgname oldver -> newver"
+pending_version() {
+    local pkg=$1 item new
+    for item in "${arch_list[@]}"; do
+        if [[ $item == "$pkg "* ]]; then
+            read -r _ _ _ new <<< "$item"
+            printf '%s\n' "$new"
+            return 0
+        fi
+    done
+    return 1
+}
+
+# Newest known version of $1: the pending version if an update is queued,
+# otherwise the installed version. Returns 1 if the package isn't installed.
+latest_version() {
+    local pkg=$1 ver
+    if ver=$(pending_version "$pkg"); then
+        printf '%s\n' "$ver"
+    elif ver=$(pacman -Q "$pkg" 2>/dev/null); then
+        printf '%s\n' "${ver#* }"
+    else
+        return 1
+    fi
+}
+
+# ---------------------------------------------------------------------------
+# Gather updates
+# ---------------------------------------------------------------------------
+
+# Fetch checkupdates once. Exit codes: 0 = updates, 2 = none, 1 = error.
+checkupdates_out=$(checkupdates 2>/dev/null)
+checkupdates_rc=$?
+if (( checkupdates_rc == 1 )); then
+    # Bail out without touching the state, so the next good run doesn't re-notify
+    echo "checkupdates failed (network or sync problem?)" >&2
+    exit 1
+fi
+
+arch_list=()
+if [[ -n $checkupdates_out ]]; then
+    mapfile -t arch_list <<< "$checkupdates_out"
+fi
+arch_updates=${#arch_list[@]}
+
+aur_list=()
+if command -v aur >/dev/null 2>&1; then
+    if aur_out=$(aur repo -u -d "$AUR_REPO"); then
+        [[ -n $aur_out ]] && mapfile -t aur_list <<< "$aur_out"
+    else
+        echo "aur repo -u failed, AUR updates not counted" >&2
+    fi
+fi
+aur_updates=${#aur_list[@]}
+updates=$((arch_updates + aur_updates))
+
+# ---------------------------------------------------------------------------
+# Kernel check: the stock kernel updated, but your custom build didn't
+# ---------------------------------------------------------------------------
+kernel_lines=()
+kernel_pending=()
+for stock_pkg in "${!KERNELS[@]}"; do
+    custom_pkg=${KERNELS[$stock_pkg]}
+
+    # Skip kernels where either package isn't installed
+    if ! stock_ver=$(latest_version "$stock_pkg") || ! custom_ver=$(latest_version "$custom_pkg"); then
+        continue
+    fi
+
+    # Flag the kernel while the stock one is newer than the newest custom build
+    # (installed, or already built into your repo but not yet installed).
+    # pkgrel is ignored: a stock packaging-only bump doesn't need a rebuild.
+    if (( $(vercmp "${stock_ver%-*}" "${custom_ver%-*}") > 0 )); then
+        kernel_lines+=("Rebuild $custom_pkg ($stock_pkg $stock_ver)")
+        kernel_pending+=("$custom_pkg $stock_ver")
+    fi
+done
+
+# ---------------------------------------------------------------------------
+# Pending list for status bars, one "<source> <pkg> <newver>" per line
+# ---------------------------------------------------------------------------
+{
+    printf 'threshold %s\n' "$THRESHOLD"
+    for item in "${arch_list[@]}"; do
+        read -r pkg _ _ new <<< "$item"
+        printf 'repo %s %s\n' "$pkg" "$new"
+    done
+    for item in "${aur_list[@]}"; do
+        read -r pkg _ _ new <<< "$item"
+        printf 'aur %s %s\n' "$pkg" "$new"
+    done
+    for item in "${kernel_pending[@]}"; do
+        printf 'kernel %s\n' "$item"
+    done
+} > "$state_dir/pending.tmp" && mv "$state_dir/pending.tmp" "$state_dir/pending"  # readers never see a partial file
+
+# ---------------------------------------------------------------------------
+# Build a single notification
+#   - kernel rebuild lines are always included
+#   - update counts and reminders only when the threshold is reached
+# ---------------------------------------------------------------------------
+over_threshold=0
+(( updates >= THRESHOLD )) && over_threshold=1
+
+parts=()
+if (( over_threshold )); then
+    parts+=("Arch: $arch_updates, AUR: $aur_updates")
+fi
+parts+=("${kernel_lines[@]}")
+
+if (( over_threshold )); then
+    reminders=()
+
+    # Always remind about git packages if git-monitor is installed
+    if command -v git-monitor >/dev/null 2>&1; then
+        reminders+=("git-monitor")
+    fi
+
+    # Firmware: only mention it when updates actually exist.
+    # fwupdmgr get-updates exits 0 when updates are available, 2 when there are none.
+    # --no-metadata-check avoids prompting/refreshing; the fwupd-refresh timer keeps metadata fresh.
+    if command -v fwupdmgr >/dev/null 2>&1; then
+        if timeout 30 fwupdmgr get-updates --no-metadata-check </dev/null >/dev/null 2>&1; then
+            reminders+=("fwupdmgr (firmware updates available)")
+        fi
+    fi
+
+    # Vet AUR changes before building them
+    if (( aur_updates )) && command -v trustsight >/dev/null 2>&1; then
+        parts+=("Before aur sync: trustsight review --repo $AUR_REPO")
+    fi
+
+    if (( ${#reminders[@]} )); then
+        printf -v list '%s, ' "${reminders[@]}"
+        parts+=("Also check: ${list%, }")
+    fi
+fi
+
+if (( ${#parts[@]} )); then
+    title="Updates available"
+    (( over_threshold )) || title="Kernel update available"
+    printf -v body '%s\n' "${parts[@]}"
+    notify_once "updates" "$title" "${body%$'\n'}"
 else
-    threshold=30
+    clear_state "updates"
-fi
-
-arch_updates=$(checkupdates | wc -l)
-aur_updates=$(aur repo -u | wc -l)
-
-updates=$(($arch_updates + $aur_updates))
-
-if [ "$updates" -ge "$threshold" ]; then
-    notify-send "Updates available" "Arch: $arch_updates, AUR: $aur_updates"
 fi

update-notify-refresh

@@ -0,0 +1,10 @@
+#!/bin/bash
+# Run update-notify for every logged-in user whose timer is active (called by the pacman hook as root)
+systemctl list-units --plain --no-legend --state=running 'user@*.service' |
+while read -r unit _; do
+    uid=${unit#user@}
+    uid=${uid%.service}
+    user=$(id -nu "$uid") || continue
+    systemctl --user -M "$user@" is-active --quiet update-notify.timer || continue
+    systemctl --user -M "$user@" start --no-block update-notify.service
+done

update-notify.hook

@@ -0,0 +1,11 @@
+[Trigger]
+Operation = Install
+Operation = Upgrade
+Operation = Remove
+Type = Package
+Target = *
+
+[Action]
+Description = Refreshing update-notify...
+When = PostTransaction
+Exec = /usr/lib/update-notify/refresh

update-notify.path

@@ -0,0 +1,10 @@
+[Unit]
+Description=Run update-notify when a local repository changes
+
+# Add the repository files to watch with: systemctl --user edit update-notify.path
+# e.g. PathChanged=/home/aur-local/aur-local.db.tar.gz.sig
+[Path]
+Unit=update-notify.service
+
+[Install]
+WantedBy=default.target

update-notify.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=Notify if updates are available
+
+[Service]
+ExecStart=/usr/bin/update-notify
+Type=oneshot

update-notify.timer

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run update-notify every 6 hours
+
+[Timer]
+OnBootSec=5min
+OnUnitActiveSec=6h
+
+[Install]
+WantedBy=timers.target