[enhancement] Install using python: wget setup_frappe.py | python

install_scripts/setup_frappe.py

@@ -0,0 +1,138 @@
+# wget setup_frappe.py | python
+import os
+import sys
+import pwd
+import stat
+import subprocess
+from distutils.spawn import find_executable
+import string
+from random import choice
+
+def install_bench(args):
+	# pre-requisites for bench repo cloning
+	install_git()
+
+	# which user to use for bench repo cloning
+	user_password = add_user(args.user)
+
+	# clone bench repo!
+
+	# install pip
+
+	# install bench
+
+def install_python27():
+	version = (sys.version_info[0], sys.version_info[1])
+
+	if version == (2, 7):
+		return
+
+	print "Installing Python 2.7"
+
+	# install python 2.7
+	success = run_os_command({
+		"apt-get": "sudo apt-get install -y python2.7",
+		"yum": "sudo yum install -y python27",
+		"brew": "brew install python"
+	})
+
+	if not success:
+		could_not_install("Python 2.7")
+
+	# replace current python with python2.7
+	os.execvp("python2.7", ([] if is_sudo_user() else ["sudo"]) + ["python2.7", __file__] + sys.argv[1:])
+
+def install_git():
+	if find_executable("git"):
+		# git already installed
+		return
+
+	print "Installing Git"
+
+	success = run_os_command({
+		"apt-get": "sudo apt-get install -y git",
+		"yum": "sudo yum install -y git",
+		"brew": "brew install git"
+	})
+
+	if not success:
+		could_not_install("Git")
+
+def add_user(user):
+	if user=="root":
+		raise Exception("--user cannot be root")
+	elif not user:
+		raise Exception("Please pass --user USER. For example: --user frappe")
+
+	user_password = None
+
+	try:
+		pwd.getpwnam(user)
+
+	except KeyError:
+		# user does not exist
+		success = run_os_command({
+			"adduser": "sudo adduser --create-home {user}".format(user=user)
+		})
+
+		if not success:
+			raise Exception("Could not create user {0}. Please add the user manually.".format(user))
+
+		user_password = get_random_string()
+		subprocess.check_call(["chpasswd", "{user}:{password}".format(user=user, password=user_password)])
+
+	finally:
+
+		# give read and execute rights to "Others" for the user's folder
+		user_folder = get_user_folder(user)
+		user_folder_stat = os.stat(user_folder)
+		os.chmod(user_folder, user_folder_stat.st_mode | stat.S_IROTH)
+		os.chmod(user_folder, user_folder_stat.st_mode | stat.S_IXOTH)
+
+		return user_password
+
+def run_os_command(command_map):
+	"""command_map is a dictionary of {"executable": command}. For ex. {"apt-get": "sudo apt-get install -y python2.7"} """
+	success = False
+	for executable, command in command_map.items():
+		if find_executable(executable):
+			returncode = subprocess.check_call(command.split())
+			success = ( returncode == 0 )
+			break
+
+	return success
+
+def could_not_install(package):
+	raise Exception("Could not install {0}. Please install it manually.".format(package))
+
+def is_sudo_user():
+	return os.geteuid() == 0
+
+def get_user_folder(user):
+	return os.path.expanduser("~{user}".format(user=user))
+
+def get_random_string(length=16):
+	"""generate a random string"""
+	return ''.join([choice(string.letters + string.digits) for i in range(length)])
+
+def parse_commandline_args():
+	import argparse
+
+	parser = argparse.ArgumentParser(description='Frappe Installer')
+	parser.add_argument('--user', metavar='USER', dest='user', action='store',
+						help="System user which will be used to start various processes required by Frappe framework. If this user doesn't exist, it will be created.")
+
+	args = parser.parse_args()
+
+	return args
+
+if __name__ == "__main__":
+	try:
+		import argparse
+	except ImportError:
+		# install python2.7
+		install_python27()
+
+	args = parse_commandline_args()
+
+	install_bench(args)