whoami

gn // get notes

Zero-dependency markdown notes, synced to WebDAV, GitHub, or Dropbox.

gn is a simple bash script that pulls a markdown note from cloud storage, opens it in $EDITOR, and pushes it back if you changed anything. Supports WebDAV (Koofr, Nextcloud, etc.), GitHub, and Dropbox. No git, no daemons, no heavy apps to install - just curl and a local folder.

↓ gn.sh - save to ~/bin/gn, chmod +x

Setup

Download gn.sh above and make it executable:

# move it somewhere on your PATH
mv gn.sh ~/bin/gn
chmod +x ~/bin/gn

Prepare your storage provider credentials:

Option A: Koofr Cloud Storage

Sign up free or log in at app.koofr.net.
Go to Account settings → Password and generate an App Password. The script needs this specific app-token, not your main web portal login password.

Option B: General WebDAV (Nextcloud, ownCloud, etc.)

Locate your service's primary WebDAV connection URL. (e.g., Nextcloud users can find this via Files → Files settings in the lower-left sidebar corner).
Ensure you have a dedicated App Password generated through your server's security settings panel for gn to use.

Option C: GitHub

GitHub Account: If you don't already have one, create an account.
Private Repository: Create a private repository (named gn, or anything you like) to hold your notes.
Personal Access Token: Generate a new Personal Access Token with the repo scope — this lets gn read and write files in your repository over the GitHub API. The setup menu will ask you to paste in your token, username, and repository name once; these are saved to your local config file.

🔗 GitHub PAT Token Docs 🔑 Direct Token Generation Link

Option D: Dropbox

Dropbox Account: If you don't already have one, create an account.
Create an App: Go to the Dropbox Developer Console and click Create App. Select Scoped access and choose the App folder option.
Set Permissions: Before finishing, click the Permissions tab of your new app. Check files.content.write and files.content.read, then click Submit.
Keys: Keep your app's App key and App secret handy from the settings tab. You'll also need to generate a long-lived refresh token via the OAuth flow below:

# 1. Open this URL (replace YOUR_APP_KEY) to authorise and get a one-time code:
https://www.dropbox.com/oauth2/authorize?client_id=YOUR_APP_KEY&response_type=code&token_access_type=offline

# 2. Exchange the code for a long-lived refresh token:
curl -s -X POST https://api.dropbox.com/oauth2/token \
  -d code=YOUR_AUTH_CODE \
  -d grant_type=authorization_code \
  -d client_id=YOUR_APP_KEY \
  -d client_secret=YOUR_APP_SECRET

Copy the refresh_token from the response — the setup menu will ask for it.

🔗 Dropbox OAuth Guide 🔑 Dropbox App Console

🔒 Privacy: Credentials are saved into ~/gn/gn.conf with chmod 600 permissions — only your local user can read the file.

Run the script. If no configuration file is found, it will run an interactive setup menu to choose your backend and configure credentials:

$ gn
No config found at ~/gn/gn.conf - let's set one up.
Select your provider:
1) Koofr (WebDAV)
2) Custom WebDAV Server
3) GitHub
4) Dropbox
Choice [1-4]: 3
GitHub Personal Access Token (input hidden):
GitHub username (repo owner): your-username
Repository name: gn
Save this config for future runs? [Y/n] Y

To clear or alter your configuration later, run gn -c to wipe gn.conf and re-run setup.

Usage

gn [options] [note]

Command	What it does
`gn`	Open (or create) default `note.md`
`gn ideas`	Open `ideas.md` - pulls, edits, pushes if changed
`gn -t`	Open today's note, `YYYY-MM-DD.md`
`gn -d ideas`	Delete a note, local and remote (with confirmation)
`gn -r old new`	Rename a note, local and remote (WebDAV `MOVE`)
`gn -s`	Sync (pull) all remote notes down to local directory
`gn -c`	Clear saved credentials and reconfigure
`gn -h`	Show help

Notes

Heads up Sync is last-write-wins. There's no merge or conflict detection - if you edit the same note from two machines without syncing in between, the second push overwrites the first.

Tip Notes are raw markdown files in your chosen storage backend, so you can read and edit them directly via a web browser or mobile app — e.g. Koofr, GitHub, or the Dropbox mobile app.

Source

The full script - copy it directly if you'd rather not download the file.

#!/usr/bin/env bash
# gn - get Notes
# A zero-dependency CLI tool to sync markdown notes via WebDAV, GitHub, or Dropbox.
# Web: gn-notes.pages.dev. Author: Barney Matthews. License: MIT

NOTES_DIR="$HOME/gn"
CONFIG_FILE="$NOTES_DIR/gn.conf"

mkdir -p "$NOTES_DIR"

for cmd in curl grep sed awk base64 tr; do
    command -v "$cmd" >/dev/null 2>&1 || { echo "Error: '$cmd' is required but not installed." >&2; exit 1; }
done

# --- Config ---
if [ -f "$CONFIG_FILE" ]; then
    chmod 600 "$CONFIG_FILE"
    while IFS='=' read -r key value; do
        key=$(echo "$key" | tr -d ' ')
        [ -z "$key" ] && continue
        case "$key" in \#*) continue ;; esac

        value=$(echo "$value" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' -e 's/[[:space:]]*#.*//')
        case "$value" in \'*\'|\"*\" ) value=$(echo "$value" | sed 's/^.\(.*\).$/\1/') ;; esac

        case "$key" in
            gn_USER)               gn_USER="$value" ;;
            gn_PASS)               gn_PASS="$value" ;;
            gn_PATH)               gn_PATH="$value" ;;
            gn_URL)                gn_URL="$value" ;;
            GIT_TOKEN)             GIT_TOKEN="$value" ;;
            GIT_OWNER)             GIT_OWNER="$value" ;;
            GIT_REPO)              GIT_REPO="$value" ;;
            GIT_API)               GIT_API="$value" ;;
            DROPBOX_APP_KEY)       DROPBOX_APP_KEY="$value" ;;
            DROPBOX_APP_SECRET)    DROPBOX_APP_SECRET="$value" ;;
            DROPBOX_REFRESH_TOKEN) DROPBOX_REFRESH_TOKEN="$value" ;;
            DROPBOX_PATH)          DROPBOX_PATH="$value" ;;
        esac
    done < "$CONFIG_FILE"
fi

# --- First-run / reconfigure setup ---
if [ -z "$gn_USER" ] && [ -z "$GIT_TOKEN" ] && [ -z "$DROPBOX_APP_KEY" ]; then
    echo "No config found at $CONFIG_FILE - let's set one up."
    echo "Select your provider:"
    echo "1) Koofr (WebDAV)"
    echo "2) Custom WebDAV Server"
    echo "3) GitHub"
    echo "4) Dropbox"
    printf "Choice [1-4]: "
    read -r provider_choice

    case "$provider_choice" in
        2)
            printf "WebDAV Server URL (e.g., https://example.com/remote.php/dav/files/user/): "
            read -r gn_URL
            printf "Username: "
            read -r gn_USER
            printf "App Password (input hidden): "
            stty -echo; read -r gn_PASS; stty echo; echo
            printf "Remote notes folder inside WebDAV [/notes]: "
            read -r gn_PATH
            gn_PATH="${gn_PATH:-/notes}"
            ;;
        3)
            printf "GitHub Personal Access Token (input hidden): "
            stty -echo; read -r GIT_TOKEN; stty echo; echo
            printf "GitHub username (repo owner): "
            read -r GIT_OWNER
            printf "Repository name: "
            read -r GIT_REPO
            ;;
        4)
            printf "Dropbox App Key: "
            read -r DROPBOX_APP_KEY
            printf "Dropbox App Secret (input hidden): "
            stty -echo; read -r DROPBOX_APP_SECRET; stty echo; echo
            printf "Dropbox Refresh Token (input hidden): "
            stty -echo; read -r DROPBOX_REFRESH_TOKEN; stty echo; echo
            printf "Remote notes folder in Dropbox [/notes]: "
            read -r DROPBOX_PATH
            DROPBOX_PATH="${DROPBOX_PATH:-/notes}"
            ;;
        *)
            gn_URL="https://app.koofr.net/dav/Koofr"
            printf "Koofr email/username: "
            read -r gn_USER
            printf "Koofr app password (input hidden): "
            stty -echo; read -r gn_PASS; stty echo; echo
            printf "Remote notes folder [/notes]: "
            read -r gn_PATH
            gn_PATH="${gn_PATH:-/notes}"
            ;;
    esac

    printf "Save this config for future runs? [Y/n] "
    read -r save
    case "$save" in
        [Nn]|[Nn][Oo]) echo "Using credentials for this session only." ;;
        *)
            umask 077
            {
                if [ -n "$GIT_TOKEN" ]; then
                    printf 'GIT_TOKEN=%s\nGIT_OWNER=%s\nGIT_REPO=%s\n' "$GIT_TOKEN" "$GIT_OWNER" "$GIT_REPO"
                elif [ -n "$DROPBOX_APP_KEY" ]; then
                    cat <<EOF
DROPBOX_APP_KEY=$DROPBOX_APP_KEY
DROPBOX_APP_SECRET=$DROPBOX_APP_SECRET
DROPBOX_REFRESH_TOKEN=$DROPBOX_REFRESH_TOKEN
DROPBOX_PATH=$DROPBOX_PATH
EOF
                else
                    printf 'gn_URL=%s\ngn_USER=%s\ngn_PASS=%s\ngn_PATH=%s\n' "$gn_URL" "$gn_USER" "$gn_PASS" "$gn_PATH"
                fi
            } > "$CONFIG_FILE"
            chmod 600 "$CONFIG_FILE"
            echo "Saved to $CONFIG_FILE"
            ;;
    esac
fi

# --- Detect Sync Engine ---
SYNC_ENGINE=""
if [ -n "$GIT_TOKEN" ] && [ -n "$GIT_OWNER" ] && [ -n "$GIT_REPO" ]; then
    SYNC_ENGINE="GITHUB"
    GIT_API="${GIT_API:-https://api.github.com/repos/${GIT_OWNER}/${GIT_REPO}/contents}"
elif [ -n "$DROPBOX_APP_KEY" ] && [ -n "$DROPBOX_APP_SECRET" ] && [ -n "$DROPBOX_REFRESH_TOKEN" ]; then
    SYNC_ENGINE="DROPBOX"
    DROPBOX_PATH="${DROPBOX_PATH:-/notes}"
    DROPBOX_PATH="/${DROPBOX_PATH#/}"
    [ "$DROPBOX_PATH" = "//" ] && DROPBOX_PATH="/"
elif [ -n "$gn_USER" ] && [ -n "$gn_PASS" ] && [ -n "$gn_URL" ]; then
    SYNC_ENGINE="WEBDAV"
    gn_URL="${gn_URL%/}"
    gn_PATH="${gn_PATH:-/notes}"
    case "$gn_PATH" in /*) ;; *) gn_PATH="/$gn_PATH" ;; esac
    [ "$gn_PATH" = "//" ] && gn_PATH="/"
else
    echo "Error: gn.conf is incomplete. Provide WebDAV (gn_URL, gn_USER, gn_PASS)," >&2
    echo "GitHub (GIT_TOKEN, GIT_OWNER, GIT_REPO), or Dropbox (DROPBOX_APP_KEY," >&2
    echo "DROPBOX_APP_SECRET, DROPBOX_REFRESH_TOKEN) credentials." >&2
    exit 1
fi

# --- Dropbox Auth Init ---
if [ "$SYNC_ENGINE" = "DROPBOX" ]; then
    dropbox_refresh() {
        local resp pfile
        pfile=$(mktemp); chmod 600 "$pfile"
        cat <<EOF > "$pfile"
grant_type=refresh_token&refresh_token=${DROPBOX_REFRESH_TOKEN}&client_id=${DROPBOX_APP_KEY}&client_secret=${DROPBOX_APP_SECRET}
EOF
        resp=$(curl -s -X POST "https://api.dropbox.com/oauth2/token" --data-binary "@$pfile")
        rm -f "$pfile"
        DROPBOX_ACCESS_TOKEN=$(echo "$resp" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="access_token") {print $(i+2); exit}}')
        [ -z "$DROPBOX_ACCESS_TOKEN" ] && { echo "Error: Dropbox token refresh failed: $resp" >&2; exit 1; }
    }
    dropbox_refresh
fi

EDITOR="${EDITOR:-nano}"

# --- Helpers ---
show_help() {
    local remote_info
    case "$SYNC_ENGINE" in
        GITHUB)  remote_info="GitHub: ${GIT_OWNER}/${GIT_REPO}" ;;
        DROPBOX) remote_info="Dropbox: ${DROPBOX_PATH}" ;;
        *)       remote_info="WebDAV: ${gn_URL}${gn_PATH}" ;;
    esac
    cat <<EOF
Usage: gn [options] [note]

  -h          Show this help
  -t          Open today's note (YYYY-MM-DD)
  -d NOTE     Delete a note (local + remote)
  -r OLD NEW  Rename a note (local + remote)
  -s          Sync (pull) all remote notes down to local directory
  -c          Clear saved credentials and reconfigure

Engine: $SYNC_ENGINE
Remote: $remote_info
EOF
    exit 0
}

api_curl() {
    local hdr rc
    if [ "$SYNC_ENGINE" = "WEBDAV" ]; then
        local nf host
        host=$(echo "$gn_URL" | awk -F/ Kishor '{print $3}')
        nf=$(mktemp); chmod 600 "$nf"
        printf 'machine %s\nlogin %s\npassword %s\n' "$host" "$gn_USER" "$gn_PASS" > "$nf"
        curl -s --netrc-file "$nf" "$@"; rc=$?
        rm -f "$nf"; return $rc
    else
        hdr=$(mktemp); chmod 600 "$hdr"
        if [ "$SYNC_ENGINE" = "GITHUB" ]; then
            echo "Authorization: token $GIT_TOKEN" > "$hdr"
        else
            echo "Authorization: Bearer $DROPBOX_ACCESS_TOKEN" > "$hdr"
        fi
        curl -s -H "@$hdr" "$@"; rc=$?
        rm -f "$hdr"; return $rc
    fi
}

urlenc() {
    local s="$1" out="" c i
    for (( i=0; i<${#s}; i++ )); do
        c="${s:$i:1}"
        case "$c" in
            [a-zA-Z0-9./_-]) out+="$c" ;;
            *) out+=$(printf '%%%02X' "'$c") ;;
        esac
    done
    echo "$out"
}

urldec() {
    echo "$1" | awk '{
        gsub(/\+/, " ");
        while (match($0, /%[0-9a-fA-F]{2}/)) {
            hex = substr($0, RSTART+1, 2);
            dec = 0;
            for (i=1; i<=2; i++) {
                c = substr(hex, i, 1);
                if (c ~ /[A-F]/) { dec = dec * 16 + (index("ABCDEF", c) + 9) }
                else if (c ~ /[a-f]/) { dec = dec * 16 + (index("abcdef", c) + 9) }
                else { dec = dec * 16 + c }
            }
            printf "%s%c", substr($0, 1, RSTART-1), dec;
            $0 = substr($0, RSTART+RLENGTH);
        }
        print $0;
    }'
}

get_file_hash() {
    if command -v md5sum >/dev/null 2>&1; then md5sum "$1" 2>/dev/null | awk '{print $1}'
    elif command -v shasum >/dev/null 2>&1; then shasum "$1" 2>/dev/null | awk '{print $1}'
    elif command -v md5 >/dev/null 2>&1; then md5 -q "$1" 2>/dev/null || md5 "$1" 2>/dev/null | awk '{print $1}'
    else ls -ln "$1" 2>/dev/null | awk '{print $5,$6,$7,$8}'
    fi
}

remote_url() { echo "${gn_URL}$(urlenc "${gn_PATH}/$1")"; }

remote_mkdir() {
    local dir="$1" path="" part parts target
    if [ -z "$dir" ] || [ "$dir" = "." ]; then target="$gn_PATH"; else target="$gn_PATH/$dir"; fi
    IFS='/' read -ra parts <<< "$target"
    for part in "${parts[@]}"; do
        [ -z "$part" ] && continue
        path="$path/$part"
        api_curl -X MKCOL "${gn_URL}$(urlenc "$path")" -o /dev/null
    done
}

pull_note() {
    local file="$1"

    if [ "$SYNC_ENGINE" = "GITHUB" ]; then
        local url resp http_code content REPLY
        url="${GIT_API}/$file"
        resp=$(api_curl -w "\n%{http_code}" "$url")
        http_code="${resp##*$'\n'}"
        REPLY="${resp%$'\n'*}"
        [ "$http_code" = "404" ] && return 0
        [ "$http_code" != "200" ] && { echo "Error: Pull failed (HTTP $http_code): $REPLY" >&2; exit 1; }
        content=$(echo "$REPLY" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="content") {print $(i+2); exit}}' | tr -d '\\ n[:space:]"')
        [ -n "$content" ] && [ "$content" != "null" ] && {
            echo "$content" | base64 -d > "$file" 2>/dev/null \
                || echo "$content" | base64 -D > "$file" 2>/dev/null
        }

    elif [ "$SYNC_ENGINE" = "DROPBOX" ]; then
        local path arg http_code
        path=$(printf '%s/%s' "$DROPBOX_PATH" "$file" | sed 's#//*#/#g')
        arg=$(printf '{"path":"%s"}' "$path")
        http_code=$(api_curl -o "$file.tmp" -w "%{http_code}" -X POST \
            "https://content.dropboxapi.com/2/files/download" \
            -H "Dropbox-API-Arg: $arg")
        case "$http_code" in
            200) mv "$file.tmp" "$file" ;;
            409) rm -f "$file.tmp" ;;
            *)   rm -f "$file.tmp"; echo "Error: Dropbox pull failed (HTTP $http_code)." >&2; exit 1 ;;
        esac

    else
        local url http_code
        url=$(remote_url "$file")
        http_code=$(api_curl -w "%{http_code}" -o "$file" "$url")
        case "$http_code" in
            200) ;;
            404) rm -f "$file" ;;
            *) echo "Error: Pull failed (HTTP $http_code)." >&2; exit 1 ;;
        esac
    fi
}

push_note() {
    local file="$1"

    if [ "$SYNC_ENGINE" = "GITHUB" ]; then
        local url sha sha_resp http_code content msg pfile REPLY
        msg="gn: update $file $(date '+%Y-%m-%d %H:%M:%S')"
        url="${GIT_API}/$file"
        content=$(base64 -w0 < "$file" 2>/dev/null || base64 < "$file" | tr -d '\n')
        pfile=$(mktemp); chmod 600 "$pfile"
        sha_resp=$(api_curl -s "$url")
        sha=$(echo "$sha_resp" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="sha") {print $(i+2); exit}}')
        if [ -n "$sha" ]; then
            printf '{"message":"%s","content":"%s","sha":"%s","branch":"main"}' \
                "$msg" "$content" "$sha" > "$pfile"
        else
            printf '{"message":"%s","content":"%s","branch":"main"}' \
                "$msg" "$content" > "$pfile"
        fi
        resp=$(api_curl -w "\n%{http_code}" -X PUT -H "Content-Type: application/json" --data-binary "@$pfile" "$url")
        rm -f "$pfile"
        http_code="${resp##*$'\n'}"
        REPLY="${resp%$'\n'*}"
        [[ "$http_code" =~ ^(200|201)$ ]] || { echo "Error: Push failed (HTTP $http_code): $REPLY" >&2; exit 1; }

    elif [ "$SYNC_ENGINE" = "DROPBOX" ]; then
        local path arg resp http_code REPLY
        path=$(printf '%s/%s' "$DROPBOX_PATH" "$file" | sed 's#//*#/#g')
        arg=$(printf '{"path":"%s","mode":"overwrite","autorename":false,"mute":true}' "$path")
        resp=$(api_curl -w "\n%{http_code}" -X POST \
            "https://content.dropboxapi.com/2/files/upload" \
            -H "Dropbox-API-Arg: $arg" \
            -H "Content-Type: application/octet-stream" \
            --data-binary "@$file")
        http_code="${resp##*$'\n'}"
        REPLY="${resp%$'\n'*}"
        [ "$http_code" = "200" ] || { echo "Error: Dropbox push failed (HTTP $http_code): $REPLY" >&2; exit 1; }

    else
        local url http_code dir
        dir=$(dirname "$file")
        remote_mkdir "$dir"
        url=$(remote_url "$file")
        http_code=$(api_curl -w "%{http_code}" -o /dev/null -X PUT --data-binary "@$file" "$url")
        case "$http_code" in
            200|201|204) ;;
            *) echo "Error: Push failed (HTTP $http_code)." >&2; exit 1 ;;
        esac
    fi
}

remote_delete() {
    local file="$1" msg="${2:-gn: delete $1}"

    if [ "$SYNC_ENGINE" = "GITHUB" ]; then
        local url sha sha_resp http_code resp pfile REPLY
        url="${GIT_API}/$file"
        pfile=$(mktemp); chmod 600 "$pfile"
        sha_resp=$(api_curl -s "$url")
        sha=$(echo "$sha_resp" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="sha") {print $(i+2); exit}}')
        if [ -z "$sha" ]; then rm -f "$pfile"; return 0; fi
        printf '{"message":"%s","sha":"%s","branch":"main"}\x27; "$msg" "$sha" > "$pfile"
        resp=$(api_curl -w "\n%{http_code}" -X DELETE -H "Content-Type: application/json" --data-binary "@$pfile" "$url")
        rm -f "$pfile"
        http_code="${resp##*$'\n'}"
        [[ "$http_code" =~ ^(200|204)$ ]] || echo "Warning: Remote delete failed (HTTP $http_code)." >&2

    elif [ "$SYNC_ENGINE" = "DROPBOX" ]; then
        local path arg resp http_code
        path=$(printf '%s/%s' "$DROPBOX_PATH" "$file" | sed 's#//*#/#g')
        arg=$(printf '{"path":"%s"}' "$path")
        resp=$(api_curl -w "\n%{http_code}" -X POST \
            -H "Content-Type: application/json" --data-binary "$arg" \
            "https://api.dropboxapi.com/2/files/delete_v2")
        http_code="${resp##*$'\n'}"
        [[ "$http_code" =~ ^(200|409)$ ]] || echo "Warning: Dropbox delete failed (HTTP $http_code)." >&2

    else
        local url http_code
        url=$(remote_url "$file")
        http_code=$(api_curl -w "%{http_code}" -o /dev/null -X DELETE "$url")
        case "$http_code" in 200|204|404) ;; *) echo "Warning: Remote delete failed (HTTP $http_code)." >&2 ;; esac
    fi
}

remote_rename() {
    local old="$1" new="$2"

    if [ "$SYNC_ENGINE" = "GITHUB" ] || [ "$SYNC_ENGINE" = "DROPBOX" ]; then
        cp "$NOTES_DIR/$old" "$NOTES_DIR/$new"
        push_note "$new"
        remote_delete "$old" "gn: rename $old to $new"
        rm -f "$NOTES_DIR/$new"
    else
        local src dst http_code dir
        dir=$(dirname "$new")
        remote_mkdir "$dir"
        src=$(remote_url "$old")
        dst=$(remote_url "$new")
        http_code=$(api_curl -w "%{http_code}" -o /dev/null -X MOVE -H "Destination: $dst" -H "Overwrite: F" "$src")
        case "$http_code" in 201|204|412|404) ;; *) echo "Warning: Remote rename failed (HTTP $http_code)." >&2 ;; esac
    fi
}

delete_note() {
    local file="$1"
    case "$file" in *.md) ;; *) file="${file}.md" ;; esac
    [ -f "$NOTES_DIR/$file" ] || { echo "Error: '$file' not found."; exit 1; }
    printf "Delete '%s'? This cannot be undone. [y/N] " "$file"
    read -r confirm
    case "$confirm" in [Yy]|[Yy][Ee][Ss]) ;; *) echo "Aborted."; exit 0 ;; esac
    remote_delete "$file" "gn: delete $file"
    rm "$NOTES_DIR/$file"
    echo "Deleted '$file'."
    exit 0
}

rename_note() {
    local old="$1" new="$2"
    case "$old" in *.md) ;; *) old="${old}.md" ;; esac
    case "$new" in *.md) ;; *) new="${new}.md" ;; esac
    [ -f "$NOTES_DIR/$old" ] || { echo "Error: '$old' not found."; exit 1; }
    [ -f "$NOTES_DIR/$new" ] && { echo "Error: '$new' already exists."; exit 1; }
    remote_rename "$old" "$new"
    [ "$(dirname "$new")" != "." ] && mkdir -p "$NOTES_DIR/$(dirname "$new")"
    mv "$NOTES_DIR/$old" "$NOTES_DIR/$new"
    echo "Renamed '$old' to '$new'."
    exit 0
}

sync_all_remote() {
    echo "Fetching remote file list... [$SYNC_ENGINE]"

    if [ "$SYNC_ENGINE" = "GITHUB" ]; then
        local resp http_code REPLY paths path
        resp=$(api_curl -w "\n%{http_code}" "${GIT_API}")
        http_code="${resp##*$'\n'}"
        REPLY="${resp%$'\n'*}"
        [ "$http_code" != "200" ] && { echo "Error: Could not list remote files (HTTP $http_code)." >&2; exit 1; }
        paths=$(echo "$REPLY" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="name") print $(i+2)}' | grep '\.md$')
        echo "$paths" | while IFS= read -r path; do
            [ -z "$path" ] && continue
            echo "Syncing: $path"
            (cd "$NOTES_DIR" && pull_note "$path")
        done

    elif [ "$SYNC_ENGINE" = "DROPBOX" ]; then
        local resp http_code REPLY arg paths path
        arg=$(printf '{"path":"%s","recursive":true}' "$DROPBOX_PATH")
        resp=$(api_curl -w "\n%{http_code}" -X POST \
            -H "Content-Type: application/json" --data-binary "$arg" \
            "https://api.dropboxapi.com/2/files/list_folder")
        http_code="${resp##*$'\n'}"
        REPLY="${resp%$'\n'*}"
        [ "$http_code" != "200" ] && { echo "Error: Could not list remote files (HTTP $http_code)." >&2; exit 1; }
        paths=$(echo "$REPLY" | awk -F'"' '{for(i=1;i<=NF;i++) if($i=="path_display") print $(i+2)}' | grep '\.md$')
        echo "$paths" | while IFS= read -r path; do
            [ -z "$path" ] && continue
            rel_path=$(echo "$path" | sed "s|^$DROPBOX_PATH/||" | sed 's|^/||')
            echo "Syncing: $rel_path"
            dir=$(dirname "$rel_path")
            [ "$dir" != "." ] && mkdir -p "$NOTES_DIR/$dir"
            (cd "$NOTES_DIR" && pull_note "$rel_path")
        done

    else
        local base_encoded_path xml_response raw_paths path dec_path rel_path dir
        base_encoded_path=$(urlenc "$gn_PATH")
        xml_response=$(api_curl -X PROPFIND -H "Depth: 1" -H "Content-Type: text/xml" "${gn_URL}${base_encoded_path}")
        if [ -z "$xml_response" ]; then
            echo "Error: Could not retrieve remote file list." >&2; exit 1
        fi
        raw_paths=$(echo "$xml_response" | tr -d '\n\r' | sed -E 's/<\/[^>]*href>//g' | sed -E 's/<[^>]*href>/\n/g' | grep -v '^[[:space:]]*$')
        echo "$raw_paths" | while IFS= read -r path; do
            [ -z "$path" ] && continue
            dec_path=$(urldec "$path")
            case "$dec_path" in
                *"$gn_PATH"*.*.md)
                    rel_path=$(echo "$dec_path" | sed "s|.*$gn_PATH||" | sed 's|^/||')
                    echo "Syncing: $rel_path"
                    dir=$(dirname "$rel_path")
                    [ "$dir" != "." ] && mkdir -p "$NOTES_DIR/$dir"
                    (cd "$NOTES_DIR" && pull_note "$rel_path")
                    ;;
            esac
        done
    fi

    echo "Sync complete."
    exit 0
}

reconfigure() {
    rm -f "$CONFIG_FILE"
    echo "Saved config cleared. Run gn again to set up new credentials."
    exit 0
}

# --- Entry Point ---
if [ "$1" = "-r" ]; then
    [ -z "$2" ] || [ -z "$3" ] && { echo "Usage: gn -r OLD NEW"; exit 1; }
    rename_note "$2" "$3"
fi

ACTION_RUN=0
while getopts "htcd:s" opt; do
    case $opt in
        h) show_help ;;
        t) NOTE_NAME=$(date '+%Y-%m-%d') ;;
        c) ACTION_RUN=1; reconfigure ;;
        d) ACTION_RUN=1; delete_note "$OPTARG" ;;
        s) ACTION_RUN=1; sync_all_remote ;;
        *) show_help ;;
    esac
done
[ "$ACTION_RUN" -eq 1 ] && exit 0
shift $((OPTIND - 1))

[ -z "$NOTE_NAME" ] && NOTE_NAME="${1:-note}\x27
if [ "$NOTE_NAME" = "gn.conf" ] || [ "$NOTE_NAME" = "gn.sh" ]; then
    echo "Error: Cannot open runtime files via gn."
    exit 1
fi

case "$NOTE_NAME" in *.md) ;; *) NOTE_NAME="${NOTE_NAME}.md" ;; esac

cd "$NOTES_DIR" || { echo "Error: Cannot access $NOTES_DIR"; exit 1; }
[ "$(dirname "$NOTE_NAME")" != "." ] && mkdir -p "$(dirname "$NOTE_NAME")"

echo "Fetching... [$SYNC_ENGINE]"
pull_note "$NOTE_NAME"

PRE_SHA=$(get_file_hash "$NOTE_NAME")
$EDITOR "$NOTE_NAME"

[ -f "$NOTE_NAME" ] || { echo "Note not saved. Cancelled."; exit 0; }

POST_SHA=$(get_file_hash "$NOTE_NAME")
if [ "$PRE_SHA" = "$POST_SHA" ]; then
    echo "No changes. Sync skipped."
else
    echo "Pushing... [$SYNC_ENGINE]"
    push_note "$NOTE_NAME"
    echo "Done."
fi