Integrate with the team repo (#267)

* initialize dotenv during tests to pick up env vars

* disable scraping if the envvar is omitted

* put the team configuration behind a rwlock

* switch from raw hyper to reqwest

* allow loading teams from an URL updated every 5 minutes

* import users into the database when missing

* fix wrong github access token on ci

Author: pietroalbini

.travis.yml

@@ -18,7 +18,7 @@ addons:
 install:
 - export RUST_LOG=debug,hyper=info,rustc=error,cargo=error,jobserver=error
 - export GITHUB_WEBHOOK_SECRETS=none
-- export GITHUB_ACCESS_TOKEN=none
+- export GITHUB_ACCESS_TOKEN=
 - export GITHUB_SCRAPE_INTERVAL=6000
 - export GITHUB_USER_AGENT=none-agent-with-left-beef
 - export POST_COMMENTS=false

CONTRIBUTING.md

@@ -76,7 +76,7 @@ Note that you can configure the Rocket web server using environment variables li
 * `GITHUB_USER_AGENT`: the UA string to send to GitHub (they request that you send your GitHub username or the app name you registered for the client ID)
 * `GITHUB_WEBHOOK_SECRETS`: a comma-delimited string of the secrets used for any ingestion webhooks. The webhook handler will attempt to validate any POST'd webhook against each secret until it either finds a matching one or runs out.
 * `RUST_LOG`: the logging configuration for [env_logger](https://crates.io/crates/env_logger). If you're unfamiliar, you can read about it in the documentation linked on crates.io. If it's not defined, logging will default to `info!()` and above.
-* `GITHUB_SCRAPE_INTERVAL`: time (in minutes) to wait in between GitHub scrapes
+* `GITHUB_SCRAPE_INTERVAL`: time (in minutes) to wait in between GitHub scrapes (scraping is disabled if this environment variable is omitted)
 * `POST_COMMENTS`: whether to post RFC bot comments on issues -- either `true` or `false`. Be very careful setting to true when testing -- it will post comments using whatever account is associated with the GitHub API key you provide.
 
 ## Database