Webhook git pull watcher Shell script

git_pull_watcher.sh

#!/bin/bash

TRIGGER_FILE="/var/www/example.com/triggers/git_pull_trigger"
LOG_FILE="/var/log/git_pull_watcher.log"
REPO_PATH="/var/www/example.com"

log() {
    echo "$(date): $1" >> "$LOG_FILE"
}

do_git_pull() {
    log "Attempting git pull in $REPO_PATH"

    cd "$REPO_PATH" || {
        log "Error: Could not change to directory $REPO_PATH"
        return 1
    }

    git rev-parse --is-inside-work-tree > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        log "Error: Not a git repository or command failed"
        return 1
    fi

    pull_output=$(git pull origin master 2>&1)
    log "Pull output: $pull_output"

    if echo "$pull_output" | grep -q "Already up to date"; then
        log "Repository is already up to date"
    elif echo "$pull_output" | grep -q "Updating"; then
        log "Changes pulled successfully"
    else
        log "Error during git pull: $pull_output"
        return 1
    fi

    return 0
}

log "Script started"

while true; do
    if [ -f "$TRIGGER_FILE" ]; then
        log "Trigger file found"
        if do_git_pull; then
            log "Git pull executed successfully"
        else
            log "Git pull failed"
        fi
        rm "$TRIGGER_FILE"
        log "Trigger file removed"
    fi
    sleep 5
done