initial-dev, ready to test

jupyter_lab_config.py

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+import logging
+import platform
+
+from itertools import product
+from os import environ
+from pathlib import Path
+
+# generated if you run `jupyter lab --generate-config`, used for additional configuration
+DEFAULT_CONFIG_FILE = Path.home() / ".jupyter/jupyter_lab_config.py"
+
+# user's home will be the root path of jupyter's file explorer
+c.ServerApp.root_dir = str(Path.home())
+
+# find a chromium-based browser on the system to use. 
+if platform.system() == "Windows":
+    # prefers Microsoft Edge on Windows
+    cmds = (
+        "Microsoft/Edge/Application/msedge.exe",
+        "Google/Chrome/Application/chrome.exe",
+    )
+    path_elements = map(Path, (environ["ProgramFiles"], environ["ProgramFiles(x86)"]))
+
+elif platform.system() == "Linux":
+    # prefers Google Chrome on Linux due to popularity of the browser
+    cmds = ("google-chrome", "microsoft-edge", "brave", "chromium")
+    path_elements = map(Path, environ["PATH"].split(":"))
+
+elif platform.system() == "Darwin":
+    # also prefers Google Chrome on MacOS due to popularity of the browser
+    cmds = ("Contents/MacOS/Google Chrome", "Contents/MacOS/Microsoft Edge")
+    path_elements = [Path(f"/Applications/{Path(cmd).name}.app") for cmd in cmds]
+
+# use the first chromium-based browser found as the browser to run Jupyter in app mode
+for cmd, path_element in product(cmds, path_elements):
+    browser = path_element / cmd
+    if browser.exists():
+        c.ServerApp.browser = (
+            f'"{browser}" --start-maximized --profile-directory=Default --app=%s'
+        )
+        break
+else:
+    logging.getLogger(__name__).warning(
+        "No Chromium-based browser was found on this system, therefore Jupyter will run "
+        + "in a new tab of the system-default browser"
+    )
+
+# read and exec default config file for additional config/overrides
+if DEFAULT_CONFIG_FILE.exists():
+    with open(DEFAULT_CONFIG_FILE, "r") as config_file:
+        exec(config_file.read())