livebook server: Add --open-new flag (#529)

* livebook server: Add `--open-new` flag

* Update lib/livebook_cli/server.ex

Co-authored-by: Jonatan Kłosko <jonatanklosko@gmail.com>

* Update lib/livebook_cli/server.ex

* Update changelog

Co-authored-by: Jonatan Kłosko <jonatanklosko@gmail.com>

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Introduced file system abstraction and an S3 support ([#492](https://github.com/livebook-dev/livebook/pull/492))
 - Added support for configuring file systems using env variables ([#498](https://github.com/livebook-dev/livebook/pull/498))
 - Added a keyboard shortcut for triggering on-hover docs ([#508](https://github.com/livebook-dev/livebook/pull/508))
+- Added `--open-new` CLI flag to `livebook server` ([#529](https://github.com/livebook-dev/livebook/pull/529))
 
 ### Changed
 

lib/livebook_cli/server.ex

@@ -33,6 +33,7 @@ defmodule LivebookCLI.Server do
       --no-token           Disable token authentication, enabled by default
                            If LIVEBOOK_PASSWORD is set, it takes precedence over token auth
       --open               Open browser window pointing to the application
+      --open-new           Open browser window pointing to a new notebook
       -p, --port           The port to start the web application on, defaults to 8080
       --root-path          The root path to use for file selection
       --sname              Set a short name for the app distributed node
@@ -58,6 +59,14 @@ defmodule LivebookCLI.Server do
           browser_open(LivebookWeb.Endpoint.access_url())
         end
 
+        if opts[:open_new] do
+          LivebookWeb.Endpoint.access_url()
+          |> URI.parse()
+          |> Map.update!(:path, &((&1 || "/") <> "explore/notebooks/new"))
+          |> URI.to_string()
+          |> browser_open()
+        end
+
         Process.sleep(:infinity)
 
       :error ->
@@ -92,6 +101,7 @@ defmodule LivebookCLI.Server do
     ip: :string,
     name: :string,
     open: :boolean,
+    open_new: :boolean,
     port: :integer,
     root_path: :string,
     sname: :string,