Access in Go to MySQL via a defaults_file.
If using the MySQL command line utilities such as mysql or
mysqladmin you can provide a defaults-file option which stores
the credentials of the MySQL server you want to connect to. If no
specific defaults file is mentioned these utilities look in ~/.my.cnf
for this file.
The Go sql interface does not support this functionality yet it can be quite convenient as it avoids the need to explicitly provide credentials.
This small module fills in that gap by providing a function to allow you
to connect to MySQL using a specified defaults-file, or using the
~/.my.cnf if you do not specify a defaults-file path.
There is also a function BuildDSN which allows you to build up a Go dsn for MySQL using various string to string map components such as host, user, password, port or socket, and thus removing the need to figure out the Go specific DSN format.
Both these functions are used by pstop to simplify the connectivity and have been split off from it as they may be useful for other programs that connect to MySQL.
Usage:
import (
...
"database/sql"
_ "github.com/go-sql-driver/mysql"
"github.com/sjmudd/mysql_defaults_file"
...
)
// open the connection to the database using the default defaults-file.
dbh, err = mysql_defaults_file.OpenUsingDefaultsFile("mysql", "", "performance_schema")
The errors you get back will be the same as calling sql.Open( "mysql",..... ).
BSD 2-Clause License
Feedback and patches welcome.
Simon J Mudd sjmudd@pobox.com