AUTOUPDATE

#!/usr/bin/env bash
#
# ─────────────────────────────────────────────────────────────────────────────
#  IMPORTANT – ONE-TIME SETUP REQUIRED (PER USER)
#
#  Each user that runs this script (manually or via cron) must explicitly
#  mark the repository directory as trusted, due to Git security protections
#  introduced in Git 2.35+ ("dubious ownership" checks).
#
#  Run ONCE as the user that will execute this script:
#
#      git config --global --add safe.directory /path/to/repo
#
#  Example:
#      git config --global --add safe.directory /home/$USER/repo_name
#
# ─────────────────────────────────────────────────────────────────────────────
#

set -e

# -----------------------------
# Detect user and home directory dynamically
# -----------------------------
RUN_USER="$(id -un)"
RUN_HOME="$(getent passwd "$RUN_USER" | cut -d: -f6)"
: "${RUN_HOME:=$HOME}"

# -----------------------------
# Log file setup
# -----------------------------
LOGFILE="$RUN_HOME/logs/cron-jobs.log"
mkdir -p "$(dirname "$LOGFILE")"

# -----------------------------
# TTY-aware logging
# -----------------------------
if [[ -t 1 ]]; then
    # Interactive: show output + log
    exec > >(tee -a "$LOGFILE") 2>&1
else
    # Cron: log only
    exec >>"$LOGFILE" 2>&1
fi

# -----------------------------
# Git safety for cron
# -----------------------------
export HOME="$RUN_HOME"
export USER="$RUN_USER"
export GIT_PAGER=cat

# -----------------------------
# Directory name for log prefix
# -----------------------------
SCRIPT_DIR_NAME="$(basename "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)")"

log() {
    echo "$SCRIPT_DIR_NAME [$(date '+%Y-%m-%d %H:%M:%S')] $*"
}

# -----------------------------
# Prevent overlapping runs (per user + repo)
# -----------------------------
LOCKFILE="/tmp/${SCRIPT_DIR_NAME}-${RUN_USER}.lock"
exec 9>"$LOCKFILE" || exit 1
flock -n 9 || exit 0

# -----------------------------
# Change to repo directory
# -----------------------------
cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1

# -----------------------------
# Prefix Git output reliably
# -----------------------------
git_prefixed() {
    # Usage: git_prefixed git <args>
    "$@" 2>&1 | while IFS= read -r line; do
        echo "$SCRIPT_DIR_NAME [$(date '+%Y-%m-%d %H:%M:%S')] $line"
    done
}

# -----------------------------
# Begin auto-update
# -----------------------------
log "AUTOUPDATE started (user=$RUN_USER)"

git_prefixed git pull --ff-only

if [[ -n $(git status --porcelain) ]]; then
    log "Changes found. Committing and pushing..."
    git add -A
    git_prefixed git commit -m "Updated $(date +%Y-%m-%d)"
    git_prefixed git push
    log "Changes pushed successfully"
else
    log "No changes found. Skip pushing."
fi

log "AUTOUPDATE finished"