Find list of github repositories that contain a string

The Github web ui search tool, along with its paging, is not ideal for getting a list of repositories containing a given string. The following techniques can help.

The following examples show how to get a list of edx repositories containing the string "edx-drf-extensions".

Github API from Browser

Using the Github API from the browser searches public repos only. To search private repos you have access to, use one of the other techniques below.

In the browser, use a url like the following:
1. https://api.github.com/search/code?q=edx-drf-extensions+org:edx
2. https://api.github.com/search/code?q=REPLACE_WITH_SEARCH_TERM+org:edx
Copy the search output into the JSON field in https://jqplay.org/
Enter the following filter in jq-play:
```
.items[].repository.full_name
```

Github API from Command Line

From the command-line, use the following and you'll be prompted for your password:

curl --user "REPLACE_WITH_GITHUB_USERNAME" https://api.github.com/search/code?q=edx-drf-extensions+org:edx
curl --user "REPLACE_WITH_GITHUB_USERNAME" https://api.github.com/search/code?q=REPLACE_WITH_SEARCH_TERM+org:edx

Copy the search output into the JSON field in https://jqplay.org/
Enter the following filter in jq-play:
```
.items[].repository.full_name
```

Github API from Python

This script has the advantage of sorting and filtering results to the unique set of repositories.

In a virtualenv, pip install PyGithub:

# Also see https://pygithub.readthedocs.io/en/latest/introduction.html
pip install PyGithub

Use a simple script like the following:

#!/usr/bin/python
from github import Github

# Set this to a personal access token.
# - Select "repo" for the oauth scopes.
# See https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line/
g = Github('REPLACE_WITH_YOUR_ACCESS_TOKEN')

repositories = set()

# Note: Gets rate limited and fails if too many hits
content_files = g.search_code(query='org:edx edx-drf-extensions')
for content in content_files:
	repositories.add(content.repository.full_name)
	rate_limit = g.get_rate_limit()
	if rate_limit.search.remaining == 0:
		print('Rate limit on searching was reached.')
		break

for repo in sorted(repositories):
	print(repo)

rate_limit = g.get_rate_limit()
print('Search rate limit:')
print(rate_limit.search)