feat: check for newer versions on PyPI

bench/cli.py

@@ -1,6 +1,6 @@
 import click
 import os, sys, logging, json, pwd, subprocess
-from bench.utils import is_root, PatchError, drop_privileges, get_env_cmd, get_cmd_output, get_frappe, log, is_dist_editable, find_parent_bench
+from bench.utils import is_root, PatchError, drop_privileges, get_env_cmd, get_cmd_output, get_frappe, log, is_dist_editable, find_parent_bench, check_latest_version
 from bench.app import get_apps
 from bench.config.common_site_config import get_config
 from bench.commands import bench_command
@@ -42,6 +42,7 @@ def cli():
 	else:
 		try:
 			# NOTE: this is the main bench command
+			check_latest_version()
 			bench_command()
 		except PatchError:
 			sys.exit(1)

bench/utils.py

@@ -21,6 +21,7 @@ from distutils.spawn import find_executable
 # imports - third party imports
 import click
 import requests
+from semantic_version import Version
 from six import iteritems
 from six.moves.urllib.parse import urlparse
 
@@ -80,6 +81,18 @@ def safe_decode(string, encoding = 'utf-8'):
 	return string
 
 
+def check_latest_version():
+	pypi_request = requests.get("https://pypi.org/pypi/frappe-bench/json")
+
+	if pypi_request.status_code == 200:
+		pypi_version_str = pypi_request.json().get('info').get('version')
+		pypi_version = Version(pypi_version_str)
+		local_version = Version(bench.__version__)
+
+		if pypi_version > local_version:
+			log("A newer version of bench is available: {0} → {1}".format(local_version, pypi_version))
+
+
 def get_frappe(bench_path='.'):
 	frappe = get_env_cmd('frappe', bench_path=bench_path)
 	if not os.path.exists(frappe):