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from __future__ import print_function
import re
import shutil
import string
from importlib import import_module
from os.path import join, exists, abspath
from shutil import copytree, ignore_patterns
import scrapy
from scrapy.commands import ScrapyCommand
from scrapy.utils.template import render_templatefile, string_camelcase
from scrapy.exceptions import UsageError
TEMPLATES_PATH = join(scrapy.__path__[0], 'templates', 'project')
TEMPLATES_TO_RENDER = (
('scrapy.cfg',),
('${project_name}', 'settings.py.tmpl'),
('${project_name}', 'items.py.tmpl'),
('${project_name}', 'pipelines.py.tmpl'),
)
IGNORE = ignore_patterns('*.pyc', '.svn')
class Command(ScrapyCommand):
requires_project = False
def syntax(self):
return "<project_name>"
def short_desc(self):
return "Create new project"
def _is_valid_name(self, project_name):
def _module_exists(module_name):
try:
import_module(module_name)
return True
except ImportError:
return False
if not re.search(r'^[_a-zA-Z]\w*$', project_name):
print('Error: Project names must begin with a letter and contain'\
' only\nletters, numbers and underscores')
elif exists(project_name):
print('Error: Directory %r already exists' % project_name)
elif _module_exists(project_name):
print('Error: Module %r already exists' % project_name)
else:
return True
return False
def run(self, args, opts):
if len(args) != 1:
raise UsageError()
project_name = args[0]
if not self._is_valid_name(project_name):
self.exitcode = 1
return
moduletpl = join(TEMPLATES_PATH, 'module')
copytree(moduletpl, join(project_name, project_name), ignore=IGNORE)
shutil.copy(join(TEMPLATES_PATH, 'scrapy.cfg'), project_name)
for paths in TEMPLATES_TO_RENDER:
path = join(*paths)
tplfile = join(project_name,
string.Template(path).substitute(project_name=project_name))
render_templatefile(tplfile, project_name=project_name,
ProjectName=string_camelcase(project_name))
print("New Scrapy project %r created in:" % project_name)
print(" %s\n" % abspath(project_name))
print("You can start your first spider with:")
print(" cd %s" % project_name)
print(" scrapy genspider example example.com")
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