gist-sync

#!/bin/bash

# gist-sync - Push file changes to GitHub Gist immediately
# Usage: gist-sync <file> [gist-id]

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Function to print colored messages
info() { echo -e "${BLUE}ℹ${NC} $1"; }
success() { echo -e "${GREEN}✅${NC} $1"; }
error() { echo -e "${RED}❌${NC} $1"; }
warn() { echo -e "${YELLOW}⚠${NC} $1"; }

# Check if gh CLI is installed
if ! command -v gh &> /dev/null; then
    error "GitHub CLI (gh) is not installed"
    echo ""
    echo "Install it with:"
    echo "  macOS:   brew install gh"
    echo "  Linux:   https://github.com/cli/cli#installation"
    echo ""
    echo "After installation, run: gh auth login"
    exit 1
fi

# Check if authenticated
if ! gh auth status &> /dev/null; then
    error "Not authenticated with GitHub"
    echo ""
    echo "Run: gh auth login"
    exit 1
fi

# Parse arguments
FILE_PATH="$1"
GIST_ID="$2"

if [ -z "$FILE_PATH" ]; then
    error "No file specified"
    echo ""
    echo "Usage: gist-sync <file> [gist-id]"
    echo ""
    echo "Examples:"
    echo "  gist-sync myfile.txt                    # Create new gist"
    echo "  gist-sync myfile.txt abc123def456       # Update existing gist"
    echo "  gist-sync myfile.txt --watch            # Watch and auto-sync"
    exit 1
fi

# Check if file exists
if [ ! -f "$FILE_PATH" ]; then
    error "File not found: $FILE_PATH"
    exit 1
fi

# Get absolute path and filename
FILE_ABS=$(cd "$(dirname "$FILE_PATH")" && pwd)/$(basename "$FILE_PATH")
FILE_NAME=$(basename "$FILE_PATH")

# Function to sync file to gist
sync_to_gist() {
    local file="$1"
    local gist_id="$2"
    
    if [ -z "$gist_id" ]; then
        # Create new gist
        info "Creating new gist for $FILE_NAME..."
        RESULT=$(gh gist create "$file" --public 2>&1)
        
        if [ $? -eq 0 ]; then
            GIST_URL=$(echo "$RESULT" | grep -o 'https://gist.github.com/[a-zA-Z0-9/]*')
            GIST_ID=$(basename "$GIST_URL")
            success "Gist created: $GIST_URL"
            
            # Save gist ID for future use
            echo "$GIST_ID" > "${file}.gist-id"
            info "Gist ID saved to ${FILE_NAME}.gist-id"
            echo "$GIST_ID"
        else
            error "Failed to create gist"
            echo "$RESULT"
            return 1
        fi
    else
        # Update existing gist
        info "Updating gist $gist_id..."
        if gh gist edit "$gist_id" "$file" 2>&1; then
            success "Gist updated: https://gist.github.com/$gist_id"
        else
            error "Failed to update gist"
            return 1
        fi
    fi
}

# Handle watch mode
if [ "$GIST_ID" = "--watch" ]; then
    # Check for saved gist ID
    if [ -f "${FILE_ABS}.gist-id" ]; then
        GIST_ID=$(cat "${FILE_ABS}.gist-id")
        info "Using saved gist ID: $GIST_ID"
    else
        # Create new gist first
        GIST_ID=$(sync_to_gist "$FILE_ABS" "")
    fi
    
    # Check if fswatch is installed
    if ! command -v fswatch &> /dev/null; then
        error "fswatch is not installed (required for --watch mode)"
        echo ""
        echo "Install it with: brew install fswatch"
        exit 1
    fi
    
    info "👀 Watching $FILE_NAME for changes... (Ctrl+C to stop)"
    echo ""
    
    # Watch for changes
    fswatch -o "$FILE_ABS" | while read -r change; do
        echo "$(date '+%Y-%m-%d %H:%M:%S') - Change detected"
        sync_to_gist "$FILE_ABS" "$GIST_ID"
        echo ""
    done
else
    # Check for saved gist ID if not provided
    if [ -z "$GIST_ID" ] && [ -f "${FILE_ABS}.gist-id" ]; then
        GIST_ID=$(cat "${FILE_ABS}.gist-id")
        info "Using saved gist ID: $GIST_ID"
    fi
    
    # Single sync
    sync_to_gist "$FILE_ABS" "$GIST_ID"
fi