Implement UI prototypes on top of the Gtk/Tickit libraries.

Also add CLI wrapper for spawning/connecting to nvim instances.

Author: tarruda

neovim/ui/__init__.py

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+"""Neovim remote UI prototypes."""

neovim/ui/cli.py

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+"""CLI for accessing the gtk/tickit UIs implemented by this package."""
+import shlex
+
+import click
+
+from .ui_bridge import UIBridge
+from .. import attach
+
+
+@click.command(context_settings=dict(allow_extra_args=True))
+@click.option('--prog')
+@click.option('--gui', '-g', default=False, is_flag=True)
+@click.option('--listen', '-l')
+@click.option('--connect', '-c')
+@click.option('--profile',
+              default='disable',
+              type=click.Choice(['ncalls', 'tottime', 'percall', 'cumtime',
+                                 'name', 'disable']))
+@click.pass_context
+def main(ctx, prog, gui, listen, connect, profile):
+    """Entry point."""
+    address = connect or listen
+
+    if address:
+        import re
+        p = re.compile(r'^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\:\d{1,5})?$')
+
+        if p.match(address):
+            args = ('tcp',)
+            kwargs = {'address': address}
+        else:
+            args = ('socket',)
+            kwargs = {'path': address}
+
+    if connect:
+        # connect to existing instance listening on address
+        nvim = attach(*args, **kwargs)
+    elif listen:
+        # spawn detached instance listening on address and connect to it
+        import os
+        import time
+        from subprocess import Popen
+        os.environ['NVIM_LISTEN_ADDRESS'] = address
+        nvim_argv = shlex.split(prog or 'nvim -T abstract_ui') + ctx.args
+        # spawn the nvim with stdio redirected to /dev/null.
+        dnull = open(os.devnull)
+        p = Popen(nvim_argv, stdin=dnull, stdout=dnull, stderr=dnull)
+        dnull.close()
+        while p.poll() or p.returncode is None:
+            try:
+                nvim = attach(*args, **kwargs)
+                break
+            except IOError:
+                # socket not ready yet
+                time.sleep(0.050)
+    else:
+        # spawn embedded instance
+        nvim_argv = shlex.split(prog or 'nvim --embed') + ctx.args
+        nvim = attach('child', argv=nvim_argv)
+
+    if gui:
+        from .gtk_ui import GtkUI
+        ui = GtkUI()
+    else:
+        from .tickit_ui import TickitUI
+        ui = TickitUI()
+    bridge = UIBridge()
+    bridge.connect(nvim, ui, profile if profile != 'disable' else None)
+
+
+if __name__ == '__main__':
+    main()