Set up a file logger

Get a file path from the `LOG_FILE` environment variable and use it for
log output.

Call `database::get_database_connection()` and log the error if it
fails.

Worried about exiting early from the FastCGI program, as DreamHost says
this causes problems
(https://help.dreamhost.com/hc/en-us/articles/217298967). But I don't
see how the program can continue without a database connection.

Return a `Result` from `main()` because it's easier to use the `?`
operator for errors that happen before logging is initialised.

1 files changed, 3 insertions, 2 deletions

diff --git a/license-generator/src/lib.rs b/license-generator/src/lib.rs
index e129d17..4dd726d 100644
--- a/license-generator/src/lib.rs
+++ b/license-generator/src/lib.rs
@@ -1,10 +1,11 @@
 #[macro_use]
 extern crate error_chain;
+extern crate log;
 extern crate mysql;
 extern crate rand;
 extern crate sha1;
 
 
-mod database;
-mod errors;
+pub mod database;
+pub mod errors;
 mod purchaser;