Prerequisites:

Before installing gn ensure your Github environment is set up.

Download gn

Download the automated installer or manually configure gn using the directions below.

#!/usr/bin/env bash

# --- Configuration ---
NOTES_DIR="$HOME/gn"

# --- Load Config ---
CONFIG_FILE="$NOTES_DIR/gn.conf"
if [ -f "$CONFIG_FILE" ]; then
    . "$CONFIG_FILE"
else
    echo "Error: No config found at $CONFIG_FILE"
    echo "Create it with:"
    echo "  GH_TOKEN=yourtoken"
    echo "  GH_OWNER=yourusername"
    echo "  GH_REPO=yourrepo"
    exit 1
fi

GH_API="https://api.github.com/repos/$GH_OWNER/$GH_REPO/contents"

mkdir -p "$NOTES_DIR"
cd "$NOTES_DIR" || { echo "Error: Could not access $NOTES_DIR"; exit 1; }

# --- Secure curl wrapper: token passed via tempfile, never exposed in ps ---
gh_curl() {
    local hdr
    hdr=$(mktemp)
    echo "Authorization: token $GH_TOKEN" > "$hdr"
    chmod 600 "$hdr"
    curl -s -H "@$hdr" "$@"
    local rc=$?
    rm -f "$hdr"
    return $rc
}

# --- GitHub API Sync Functions (used when git is not available) ---
pull_from_github() {
    local file="$1"
    local response content http_code
    response=$(gh_curl -w "\n%{http_code}" "$GH_API/$file")
    http_code=$(echo "$response" | tail -1)
    response=$(echo "$response" | head -n -1)
    if [ "$http_code" = "404" ]; then
        return 0
    fi
    if [ "$http_code" != "200" ]; then
        echo "Error: pull failed (HTTP $http_code). Check your token and repo name." >&2
        exit 1
    fi
    content=$(echo "$response" | grep '"content"' | sed 's/.*"content": *"\(.*\)".*/\1/' | tr -d '\\n')
    if [ -n "$content" ]; then
        echo "$content" | base64 -d > "$file" 2>/dev/null || echo "$content" | base64 -D > "$file"
    fi
}

push_to_github() {
    local file="$1"
    local sha content msg api_url sha_response push_response http_code
    api_url="$GH_API/$file"
    sha_response=$(gh_curl "$api_url")
    sha=$(echo "$sha_response" | grep '"sha"' | head -1 | sed 's/.*"sha": *"\([^"]*\)".*/\1/')
    content=$(base64 -w0 < "$file" 2>/dev/null || base64 < "$file")
    msg="Note update: $file on $(date '+%Y-%m-%d %H:%M:%S')"
    local sha_field=""
    [ -n "$sha" ] && sha_field=",\"sha\":\"$sha\""
    push_response=$(gh_curl -w "\n%{http_code}" -X PUT "$api_url" \
        -d "{\"message\":\"$msg\",\"content\":\"$content\"$sha_field}")
    http_code=$(echo "$push_response" | tail -1)
    if [ "$http_code" != "200" ] && [ "$http_code" != "201" ]; then
        echo "Error: push failed (HTTP $http_code). Your note was saved locally but not synced." >&2
        exit 1
    fi
}

# --- Help Text Function ---
show_help() {
    echo "Usage: gn [options] [note_name]"
    echo ""
    echo "Options:"
    echo "  -h        Show this help message"
    echo "  -l        List all notes in your notes directory"
    echo "  -g QUERY  Search for text across all notes (grep)"
    echo "  -t        Quickly open today's journal note (YYYY-MM-DD.md)"
    echo "  -d NOTE   Delete a note locally and from GitHub"
    echo "  -r OLD NEW  Rename a note locally and on GitHub"
    echo ""
    echo "Examples:"
    echo "  gn                  Opens index.md"
    echo "  gn log              Creates log.md"
    echo "  gn log              Opens log.md"
    echo "  gn work/todo        Opens work/todo.md"
    echo "  gn -g 'api key'     Searches all notes for the term 'api key'"
    echo "  gn -t               Creates a note named today's date"
    exit 0
}

# --- List Files Function ---
list_notes() {
    echo "Current Notes in $NOTES_DIR:"
    if [ -d "$NOTES_DIR" ]; then
        find . -type f -not -name "gn.conf" -not -path '*/.*' | sed 's|^\./||' | sort
    fi
    exit 0
}

# --- Search Inside Notes Function ---
search_notes() {
    echo "Searching for '$1' inside notes..."
    grep -Rin "$1" . --exclude-dir=".git" --exclude="gn.conf"
    exit 0
}

# --- Delete Note Function ---
delete_note() {
    local file="$1"
    if [[ "$file" != *.md ]]; then
        file="${file}.md"
    fi
    if [ ! -f "$NOTES_DIR/$file" ]; then
        echo "Error: '$file' not found locally."
        exit 1
    fi
    read -r -p "Delete '$file'? This cannot be undone. [y/N] " confirm
    [[ "$confirm" =~ ^[Yy]$ ]] || { echo "Aborted."; exit 0; }
    local sha api_url
    api_url="$GH_API/$file"
    sha=$(gh_curl "$api_url" | grep '"sha"' | head -1 | sed 's/.*"sha": *"\([^"]*\)".*/\1/')
    if [ -n "$sha" ]; then
        gh_curl -X DELETE "$api_url" \
            -d "{\"message\":\"Delete $file\",\"sha\":\"$sha\"}" > /dev/null
        echo "Deleted from GitHub."
    else
        echo "Warning: File not found on GitHub. Removing locally only."
    fi
    rm "$NOTES_DIR/$file"
    echo "Deleted '$file'."
    exit 0
}

# --- Rename Note Function ---
rename_note() {
    local old_name="$1"
    local new_name="$2"
    if [[ "$old_name" != *.md ]]; then
        old_name="${old_name}.md"
    fi
    if [[ "$new_name" != *.md ]]; then
        new_name="${new_name}.md"
    fi
    if [ ! -f "$NOTES_DIR/$old_name" ]; then
        echo "Error: '$old_name' not found locally."
        exit 1
    fi
    if [ -f "$NOTES_DIR/$new_name" ]; then
        echo "Error: '$new_name' already exists."
        exit 1
    fi
    local sha old_api_url new_api_url content
    old_api_url="$GH_API/$old_name"
    new_api_url="$GH_API/$new_name"
    sha=$(gh_curl "$old_api_url" | grep '"sha"' | head -1 | sed 's/.*"sha": *"\([^"]*\)".*/\1/')
    content=$(base64 -w0 < "$NOTES_DIR/$old_name" 2>/dev/null || base64 < "$NOTES_DIR/$old_name")
    # Create new file on GitHub
    gh_curl -X PUT "$new_api_url" \
        -d "{\"message\":\"Rename $old_name to $new_name\",\"content\":\"$content\"}" > /dev/null
    # Delete old file on GitHub
    if [ -n "$sha" ]; then
        gh_curl -X DELETE "$old_api_url" \
            -d "{\"message\":\"Rename $old_name to $new_name\",\"sha\":\"$sha\"}" > /dev/null
    fi
    mv "$NOTES_DIR/$old_name" "$NOTES_DIR/$new_name"
    echo "Renamed '$old_name' to '$new_name'."
    exit 0
}

# --- Parse Flags ---
while getopts "hlg:td:r:" opt; do
    case ${opt} in
        h ) show_help ;;
        l ) list_notes ;;
        g ) search_notes "$OPTARG" ;;
        t ) NOTE_NAME=$(date '+%Y-%m-%d') ;;
        d ) delete_note "$OPTARG" ;;
        r ) rename_note "$OPTARG" "${@:$OPTIND:1}" ;;
        \? ) show_help ;;
    esac
done
shift $((OPTIND -1))

# If -t wasn't passed, get note name from command line arguments
if [ -z "$NOTE_NAME" ]; then
    NOTE_NAME="${1:-index}"
fi

if [[ "$NOTE_NAME" == "gn.conf" ]]; then
    echo "Error: Protection rule triggered. Cannot edit configuration file via gn script loop."
    exit 1
fi

if [[ "$NOTE_NAME" != *.md ]]; then
    NOTE_NAME="${NOTE_NAME}.md"
fi

NOTE_DIR_PATH=$(dirname "$NOTE_NAME")
if [ "$NOTE_DIR_PATH" != "." ]; then
    mkdir -p "$NOTE_DIR_PATH"
fi

# --- Sync From Cloud ---
echo "Fetching latest cloud updates..."
pull_from_github "$NOTE_NAME"

# --- Open the Editor ---
${EDITOR:-nano} "$NOTE_NAME"

# --- Sync Back to GitHub ---
echo "Syncing changes to GitHub..."
push_to_github "$NOTE_NAME"
echo "Sync complete!"

Manual Installation

If you prefer not to use the automated install.sh script, follow these steps to configure gn manually:

mkdir -p ~/gn
nano ~/gn/gn.conf
chmod 600 ~/gn/gn.conf

GH_TOKEN=ghp_yourpersonalaccesstoken
GH_OWNER=GITHUB-USERNAME
GH_REPO=gn

chmod +x gn.sh
sudo cp gn.sh /usr/local/bin/gn

gn                  # Opens your main index.md
gn daily-log        # Creates/Opens daily-log.md
gn work/reminders   # Creates work/ directory and opens reminders.md
gn -h               # Displays help page
gn -l               # Lists all your notes
gn -g "todo"        # Finds text matching "todo" inside any note
gn -t               # Opens today's automated scratchpad entry
gn -d daily-log     # Deletes daily-log.md locally and from GitHub
gn -r old new       # Renames old.md to new.md locally and on GitHub

Setting Up a Second Computer

Your notes live in GitHub and sync via the API, so there's nothing to clone. Just create the directory, drop in your config file, and install the script.

mkdir -p ~/gn
nano ~/gn/gn.conf
chmod 600 ~/gn/gn.conf

GH_TOKEN=ghp_yourpersonalaccesstoken
GH_OWNER=GITHUB-USERNAME
GH_REPO=gn

chmod +x gn.sh
sudo cp gn.sh /usr/local/bin/gn

Editing Notes in the Browser

If you're on a machine without a terminal - or just want a quick edit from any browser - you can use github.dev, a full VS Code instance that runs entirely in the browser and commits directly to your repo.

https://github.dev/YOUR-USERNAME/gn