Add ui extensions commands

Following commads are added: generate, list, deploy, delete.
They will help the user to manage his ui extensions.

CLI Spinner class is implemented to indicate the action of the user.

Extension generator is class which inherits
generator abstract class and
give the ability to copy existing template from
the file system, of the user, and populate it
with the data, given by the user.

Prompt and PromptLauncher classes are
build on top of python click lib to give
the ability to validate and collect
the data from the user.
Signed-off-by: Nikola Vladimirov Iliev <nvladimirovi@vmware.com>

Author: Nikola Vladimirov Iliev

.gitignore

@@ -60,6 +60,7 @@ docs/_build/
 target/
 
 .idea/
+.vscode/
 
 docs/.bundle
 docs/_site

.travis.yml

@@ -6,6 +6,7 @@ python:
 install:
   - pip install git+https://github.com/vmware/pyvcloud.git
   - pip install -r requirements.txt
+  - pip install -e .
   - python setup.py install
   - pip install tox
 

tests/run-tests.sh

@@ -6,3 +6,4 @@ D=`dirname $0`
 $D/tenant-onboard.sh
 $D/tenant-operations.sh
 $D/cleanup.sh
+$D/ui-ext-test.sh

tests/ui-ext-test.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -e
+
+VCD="C:\Users\nvladimirovi\AppData\Roaming\Python\Python36\Scripts\vcd.exe"
+VCD_UI_EXT_ABS_PATH=D:/test-py-cli/ui_plugin
+VCD_HOST=bos1-vcd-sp-static-198-58.eng.vmware.com
+VCD_ORG=System
+VCD_USER=administrator
+VCD_PASSWORD='********'
+
+# $VCD login $VCD_HOST $VCD_ORG $VCD_USER --password $VCD_PASSWORD
+
+$VCD version
+
+echo 'This should deploy ui extension'
+$VCD uiext deploy --path $VCD_UI_EXT_ABS_PATH  -p -pr
+echo 'This should list all ui extensions'
+$VCD uiext list
+echo 'This should delete all ui extensions'
+$VCD uiext delete -a
+echo 'This list command should print "There are no UI Extensions..." in the command line'
+$VCD uiext list

utilities/__init__.py

@@ -0,0 +1 @@
+from utilities.colors import Colors

utilities/colors.py

@@ -0,0 +1,12 @@
+from enum import Enum
+
+Colors = Enum('Colors', {
+    'HEADER': '\033[95m',
+    'OKBLUE': '\033[94m',
+    'OKGREEN': '\033[92m',
+    'WARNING': '\033[93m',
+    'FAIL': '\033[91m',
+    'ENDC': '\033[0m',
+    'BOLD': '\033[1m',
+    'UNDERLINE': '\033[4m'
+})

utilities/ui_ext/cli_spinners/__init__.py

@@ -0,0 +1 @@
+from utilities.ui_ext.cli_spinners.cli_spinner import CliSpinner

utilities/ui_ext/cli_spinners/cli_spinner.py

@@ -0,0 +1,158 @@
+import threading
+import time
+import sys
+from enum import Enum
+
+Spinners = Enum('Spinners', {
+    "line": {
+        "interval": 130,
+        "frames": [
+            "-",
+            "\\",
+            "|",
+            "/"
+        ]
+    },
+    "dots": {
+        "interval": 500,
+        "frames": [
+            ".",
+            "..",
+            "..."
+        ]
+    }
+})
+
+
+def backspace(n):
+    # print((b'\x08').decode(), end='')     # use \x08 char to go back
+    print('\r', end='')
+
+
+class CliSpinner:
+    """CliSpinner library.
+    Attributes
+    ----------
+    CLEAR_LINE : str
+        Code to clear the line
+    """
+    CLEAR_LINE = '\033[K'
+
+    def __init__(self, text=None, spinner='dots', placement='left',
+                 stream=sys.stdout):
+        """Constructs the CliSpinner object.
+        Parameters
+        ----------
+        text : str, optional
+            Text to display while spinning.
+        spinner : str|dict, optional
+            String or dictionary representing spinner. String can be one
+            of 2 spinners supported.
+        placement: str, optional
+            Side of the text to place the spinner on. Can be `left` or `right`.
+            Defaults to `left`.
+        stream : io, optional
+            Output.
+        """
+        self._spinner = Spinners[spinner].value
+        self.text = text
+        self._stop_spinner = None
+        self._interval = self._spinner['interval']
+        self._stream = stream
+        self._frame_index = 0
+        self._placement = placement
+
+    def clear(self):
+        """Clears the line and returns cursor to the start.
+        of line
+        Returns
+        -------
+        self
+        """
+        self._stream.write('\r')
+        self._stream.write(self.CLEAR_LINE)
+
+        return self
+
+    def _frame(self):
+        """Builds and returns the frame to be rendered
+        Returns
+        -------
+        frame
+        """
+        frame = self._spinner['frames'][self._frame_index]
+        self._frame_index += 1
+
+        if self._frame_index == len(self._spinner['frames']):
+            self._frame_index = 0
+
+        return frame
+
+    def _render_frame(self):
+        """Renders the frame on the line after clearing it.
+        """
+        frame = self._frame()
+
+        if self.text is not None:
+            output = u'{0} {1}'.format(*[
+                (self.text, frame)
+                if self._placement == 'right' else
+                (frame, self.text)
+            ][0])
+        else:
+            output = '{0}'.format(frame)
+        self._stream.write(output)
+        backspace(len(output))
+
+    def _render(self):
+        """Runs the render until thread flag is set.
+        Returns
+        -------
+        self
+        """
+        while not self._stop_spinner.is_set():
+            self._render_frame()
+            time.sleep(0.001 * self._interval)
+
+        return self
+
+    def start(self, text=None):
+        """Starts the spinner on a separate thread.
+        Parameters
+        ----------
+        text : None, optional
+            Text to be used alongside spinner
+        Returns
+        -------
+        self
+        """
+        if text is not None:
+            self.text = text
+
+        self._stop_spinner = threading.Event()
+        self._spinner_thread = threading.Thread(target=self._render)
+        self._spinner_thread.setDaemon(True)
+        self._render_frame()
+        self._spinner_id = self._spinner_thread.name
+        self._spinner_thread.start()
+        
+        return self
+
+    def stop(self, message=None):
+        """Stops the spinner and clears the line.
+        Returns
+        -------
+        self
+        """
+        if self._spinner_thread:
+            self._stop_spinner.set()
+            self._spinner_thread.join()
+
+        self._frame_index = 0
+        self._spinner_id = None
+        self.clear()
+
+        if message is not None:
+            print(message)
+
+        return self

utilities/ui_ext/ext_generator/__init__.py

@@ -0,0 +1,2 @@
+from utilities.ui_ext.ext_generator.generator import Generator
+from utilities.ui_ext.ext_generator.ext_generator import ExtGenerator