Update output streams so we can redirect stdout with only stats to a file.

Previously, input prompts (like username/pwd) were going to stdout, effectively
breaking the tool if used as directed in the instructions.

tools/gh_api.py

@@ -1,301 +1,303 b''
 """Functions for Github API requests."""
 from __future__ import print_function
 
 try:
     input = raw_input
 except NameError:
     pass
 
 import os
 import re
 import sys
 
 import requests
 import getpass
 import json
 
 try:
     import requests_cache
 except ImportError:
     print("cache not available, install `requests_cache` for caching.", file=sys.stderr)
 else:
     requests_cache.install_cache("gh_api", expire_after=3600)
 
 # Keyring stores passwords by a 'username', but we're not storing a username and
 # password
 fake_username = 'ipython_tools'
 
 class Obj(dict):
     """Dictionary with attribute access to names."""
     def __getattr__(self, name):
         try:
             return self[name]
         except KeyError:
             raise AttributeError(name)
 
     def __setattr__(self, name, val):
         self[name] = val
 
 token = None
 def get_auth_token():
     global token
 
     if token is not None:
         return token
 
     import keyring
     token = keyring.get_password('github', fake_username)
     if token is not None:
         return token
 
     print("Please enter your github username and password. These are not "
-           "stored, only used to get an oAuth token. You can revoke this at "
-           "any time on Github.")
-    user = input("Username: ")
-    pw = getpass.getpass("Password: ")
+          "stored, only used to get an oAuth token. You can revoke this at "
+          "any time on Github.\n"
+          "Username: ", file=sys.stderr, end='')
+    user = input('')
+    pw = getpass.getpass("Password: ", stream=sys.stderr)
 
     auth_request = {
       "scopes": [
         "public_repo",
         "gist"
       ],
       "note": "IPython tools",
       "note_url": "https://github.com/ipython/ipython/tree/master/tools",
     }
     response = requests.post('https://api.github.com/authorizations',
                             auth=(user, pw), data=json.dumps(auth_request))
-    if response.status_code == 401 and response.headers.get('X-GitHub-OTP') == 'required; sms':
-        print("Your login API resquest a SMS one time password")
-        sms_pw = getpass.getpass("SMS password: ")
+    if response.status_code == 401 and \
+       response.headers.get('X-GitHub-OTP') == 'required; sms':
+        print("Your login API resquest a SMS one time password", file=sys.stderr)
+        sms_pw = getpass.getpass("SMS password: ", stream=sys.stderr)
         response = requests.post('https://api.github.com/authorizations',
                             auth=(user, pw), 
                             data=json.dumps(auth_request),
                             headers={'X-GitHub-OTP':sms_pw})
     response.raise_for_status()
     token = json.loads(response.text)['token']
     keyring.set_password('github', fake_username, token)
     return token
 
 def make_auth_header():
     return {'Authorization': 'token ' + get_auth_token()}
 
 def post_issue_comment(project, num, body):
     url = 'https://api.github.com/repos/{project}/issues/{num}/comments'.format(project=project, num=num)
     payload = json.dumps({'body': body})
     requests.post(url, data=payload, headers=make_auth_header())
 
 def post_gist(content, description='', filename='file', auth=False):
     """Post some text to a Gist, and return the URL."""
     post_data = json.dumps({
       "description": description,
       "public": True,
       "files": {
         filename: {
           "content": content
         }
       }
     }).encode('utf-8')
 
     headers = make_auth_header() if auth else {}
     response = requests.post("https://api.github.com/gists", data=post_data, headers=headers)
     response.raise_for_status()
     response_data = json.loads(response.text)
     return response_data['html_url']
 
 def get_pull_request(project, num, auth=False):
     """get pull request info  by number
     """
     url = "https://api.github.com/repos/{project}/pulls/{num}".format(project=project, num=num)
     if auth:
         header = make_auth_header()
     else:
         header = None
     print("fetching %s" % url, file=sys.stderr)
     response = requests.get(url, headers=header)
     response.raise_for_status()
     return json.loads(response.text, object_hook=Obj)
 
 def get_pull_request_files(project, num, auth=False):
     """get list of files in a pull request"""
     url = "https://api.github.com/repos/{project}/pulls/{num}/files".format(project=project, num=num)
     if auth:
         header = make_auth_header()
     else:
         header = None
     return get_paged_request(url, headers=header)
 
 element_pat = re.compile(r'<(.+?)>')
 rel_pat = re.compile(r'rel=[\'"](\w+)[\'"]')
 
 def get_paged_request(url, headers=None, **params):
     """get a full list, handling APIv3's paging"""
     results = []
     params.setdefault("per_page", 100)
     while True:
         if '?' in url:
             params = None
             print("fetching %s" % url, file=sys.stderr)
         else:
             print("fetching %s with %s" % (url, params), file=sys.stderr)
         response = requests.get(url, headers=headers, params=params)
         response.raise_for_status()
         results.extend(response.json())
         if 'next' in response.links:
             url = response.links['next']['url']
         else:
             break
     return results
 
 def get_pulls_list(project, auth=False, **params):
     """get pull request list"""
     params.setdefault("state", "closed")
     url = "https://api.github.com/repos/{project}/pulls".format(project=project)
     if auth:
         headers = make_auth_header()
     else:
         headers = None
     pages = get_paged_request(url, headers=headers, **params)
     return pages
 
 def get_issues_list(project, auth=False, **params):
     """get issues list"""
     params.setdefault("state", "closed")
     url = "https://api.github.com/repos/{project}/issues".format(project=project)
     if auth:
         headers = make_auth_header()
     else:
         headers = None
     pages = get_paged_request(url, headers=headers, **params)
     return pages
 
 def get_milestones(project, auth=False, **params):
     params.setdefault('state', 'all')
     url = "https://api.github.com/repos/{project}/milestones".format(project=project)
     if auth:
         headers = make_auth_header()
     else:
         headers = None
     milestones = get_paged_request(url, headers=headers, **params)
     return milestones
 
 def get_milestone_id(project, milestone, auth=False, **params):
     milestones = get_milestones(project, auth=auth, **params)
     for mstone in milestones:
         if mstone['title'] == milestone:
             return mstone['number']
     else:
         raise ValueError("milestone %s not found" % milestone)
 
 def is_pull_request(issue):
     """Return True if the given issue is a pull request."""
     return bool(issue.get('pull_request', {}).get('html_url', None))
 
 def get_authors(pr):
     print("getting authors for #%i" % pr['number'], file=sys.stderr)
     h = make_auth_header()
     r = requests.get(pr['commits_url'], headers=h)
     r.raise_for_status()
     commits = r.json()
     authors = []
     for commit in commits:
         author = commit['commit']['author']
         authors.append("%s <%s>" % (author['name'], author['email']))
     return authors
 
 # encode_multipart_formdata is from urllib3.filepost
 # The only change is to iter_fields, to enforce S3's required key ordering
 
 def iter_fields(fields):
     fields = fields.copy()
     for key in ('key', 'acl', 'Filename', 'success_action_status', 'AWSAccessKeyId',
         'Policy', 'Signature', 'Content-Type', 'file'):
         yield (key, fields.pop(key))
     for (k,v) in fields.items():
         yield k,v
 
 def encode_multipart_formdata(fields, boundary=None):
     """
     Encode a dictionary of ``fields`` using the multipart/form-data mime format.
 
     :param fields:
         Dictionary of fields or list of (key, value) field tuples.  The key is
         treated as the field name, and the value as the body of the form-data
         bytes. If the value is a tuple of two elements, then the first element
         is treated as the filename of the form-data section.
 
         Field names and filenames must be unicode.
 
     :param boundary:
         If not specified, then a random boundary will be generated using
         :func:`mimetools.choose_boundary`.
     """
     # copy requests imports in here:
     from io import BytesIO
     from requests.packages.urllib3.filepost import (
         choose_boundary, six, writer, b, get_content_type
     )
     body = BytesIO()
     if boundary is None:
         boundary = choose_boundary()
 
     for fieldname, value in iter_fields(fields):
         body.write(b('--%s\r\n' % (boundary)))
 
         if isinstance(value, tuple):
             filename, data = value
             writer(body).write('Content-Disposition: form-data; name="%s"; '
                                'filename="%s"\r\n' % (fieldname, filename))
             body.write(b('Content-Type: %s\r\n\r\n' %
                        (get_content_type(filename))))
         else:
             data = value
             writer(body).write('Content-Disposition: form-data; name="%s"\r\n'
                                % (fieldname))
             body.write(b'Content-Type: text/plain\r\n\r\n')
 
         if isinstance(data, int):
             data = str(data)  # Backwards compatibility
         if isinstance(data, six.text_type):
             writer(body).write(data)
         else:
             body.write(data)
 
         body.write(b'\r\n')
 
     body.write(b('--%s--\r\n' % (boundary)))
 
     content_type = b('multipart/form-data; boundary=%s' % boundary)
 
     return body.getvalue(), content_type
 
 
 def post_download(project, filename, name=None, description=""):
     """Upload a file to the GitHub downloads area"""
     if name is None:
         name = os.path.basename(filename)
     with open(filename, 'rb') as f:
         filedata = f.read()
 
     url = "https://api.github.com/repos/{project}/downloads".format(project=project)
 
     payload = json.dumps(dict(name=name, size=len(filedata),
                     description=description))
     response = requests.post(url, data=payload, headers=make_auth_header())
     response.raise_for_status()
     reply = json.loads(response.content)
     s3_url = reply['s3_url']
 
     fields = dict(
         key=reply['path'],
         acl=reply['acl'],
         success_action_status=201,
         Filename=reply['name'],
         AWSAccessKeyId=reply['accesskeyid'],
         Policy=reply['policy'],
         Signature=reply['signature'],
         file=(reply['name'], filedata),
     )
     fields['Content-Type'] = reply['mime_type']
     data, content_type = encode_multipart_formdata(fields)
     s3r = requests.post(s3_url, data=data, headers={'Content-Type': content_type})
     return s3r