Bash script to take a specific obsidian note and copy it along with images into hugo content

obsidian_to_hugo.sh

#!/bin/bash

set -x  # Enable debug mode

# Check if correct number of arguments are provided
if [ "$#" -ne 3 ]; then
    echo "Usage: $0 <obsidian_file> <hugo_content_dir> <hugo_post_name>"
    exit 1
fi

OBSIDIAN_FILE="$1"
HUGO_CONTENT_DIR="$2"
HUGO_POST_NAME="$3"

# Function to format title
format_title() {
    echo "$1" | sed 's/_/ /g; s/\b\(.\)/\u\1/g'
}

# Format the title
FORMATTED_TITLE=$(format_title "$HUGO_POST_NAME")

# Derive Hugo root directory from content directory
HUGO_ROOT_DIR="${HUGO_CONTENT_DIR%/content/*}"

# Get the absolute path of the Obsidian file and convert it to Windows path
OBSIDIAN_FILE_ABS=$(wslpath -w "$(readlink -f "$OBSIDIAN_FILE")")

# Check if Obsidian file exists
if [ ! -f "$OBSIDIAN_FILE" ]; then
    echo "Error: Obsidian file not found: $OBSIDIAN_FILE"
    exit 1
fi

# Create Hugo post directory
HUGO_POST_DIR="$HUGO_CONTENT_DIR/$HUGO_POST_NAME"
mkdir -p "$HUGO_POST_DIR"

# Function to find and use Hugo archetype
use_hugo_archetype() {
    local archetype_path="$HUGO_ROOT_DIR/archetypes/default.md"
    if [ -f "$archetype_path" ]; then
        echo "Using Hugo archetype: $archetype_path"
        cp "$archetype_path" "$HUGO_POST_DIR/index.md"
        
        # Replace placeholders in the archetype
        sed -i "s|title = \".*\"|title = \"$FORMATTED_TITLE\"|g" "$HUGO_POST_DIR/index.md"
        sed -i "s|date = \".*\"|date = \"$(date +"%Y-%m-%dT%H:%M:%S%z")\"|g" "$HUGO_POST_DIR/index.md"
        
        # Append Obsidian content to the archetype
        echo "" >> "$HUGO_POST_DIR/index.md"
        cat "$OBSIDIAN_FILE" >> "$HUGO_POST_DIR/index.md"
    else
        echo "Hugo archetype not found. Creating a basic front matter."
        echo "+++" > "$HUGO_POST_DIR/index.md"
        echo "title = \"$FORMATTED_TITLE\"" >> "$HUGO_POST_DIR/index.md"
        echo "date = \"$(date +"%Y-%m-%dT%H:%M:%S%z")\"" >> "$HUGO_POST_DIR/index.md"
        echo "author = \"Capone\"" >> "$HUGO_POST_DIR/index.md"
        echo "+++" >> "$HUGO_POST_DIR/index.md"
        echo "" >> "$HUGO_POST_DIR/index.md"
        cat "$OBSIDIAN_FILE" >> "$HUGO_POST_DIR/index.md"
    fi
}

# Use Hugo archetype
use_hugo_archetype

# Extract image references from the Markdown file
IMAGES=$(grep -oP '!\[\[.*?\]\]' "$HUGO_POST_DIR/index.md" | sed 's/!\[\[//;s/\]\]//')

# Function to find image in parent directory
find_image() {
    local parent_dir="$(dirname "$(wslpath -u "$OBSIDIAN_FILE_ABS")")"
    local grandparent_dir="$(dirname "$parent_dir")"
    local image_name="$1"
    
    echo "Searching for image: $image_name" >&2
    echo "In directory: $parent_dir" >&2
    echo "And in directory: $grandparent_dir" >&2
    
    if [ -f "$parent_dir/$image_name" ]; then
        echo "$parent_dir/$image_name"
    elif [ -f "$grandparent_dir/$image_name" ]; then
        echo "$grandparent_dir/$image_name"
    else
        echo ""
    fi
}

# Copy each referenced image and update links
while IFS= read -r IMG; do
    echo "Processing image: $IMG" >&2
    
    # Find the image in the parent directory
    IMG_PATH=$(find_image "$IMG")
    
    echo "Found image path: $IMG_PATH" >&2
    
    # Check if the image file exists
    if [ -n "$IMG_PATH" ] && [ -f "$IMG_PATH" ]; then
        # Copy image to Hugo static directory
        mkdir -p "$HUGO_ROOT_DIR/static/img"
        cp "$IMG_PATH" "$HUGO_ROOT_DIR/static/img/"
        echo "Copied: $IMG to $HUGO_ROOT_DIR/static/img/"
        
        # Replace Obsidian image syntax with Hugo shortcode in the Markdown file
        sed -i "s|!\[\[$IMG\]\]|{{< image src=\"/img/$IMG\" alt=\"$IMG\" position=\"center\" style=\"border-radius: 8px;\" >}}|g" "$HUGO_POST_DIR/index.md"
    else
        echo "Warning: Image not found: $IMG"
    fi
done <<< "$IMAGES"

# Convert any remaining Obsidian-style links to Hugo shortcode
sed -i 's/!\[\[\(.*\)\]\]/{{< image src="\/img\/\1" alt="\1" position="center" style="border-radius: 8px;" >}}/g' "$HUGO_POST_DIR/index.md"

echo "Post copied to Hugo directory: $HUGO_POST_DIR"
echo "Image references updated to Hugo shortcode format."
echo "Hugo root directory derived as: $HUGO_ROOT_DIR"