Tokio-postgres support for service file and environment variables.

Connection string parsing with support for service file and a subset of psql environment variables.

Environment variables

• PGSERVICE - Name of the postgres service used for connection params.
• PGSYSCONFDIR - Location of the service files.
• PGSERVICEFILE - Name of the service file.
• PGHOST - behaves the same as the host connection parameter.
• PGPORT - behaves the same as the port connection parameter.
• PGDATABASE - behaves the same as the dbname connection parameter.
• PGUSER - behaves the same as the user connection parameter.
• PGOPTIONS - behaves the same as the options parameter.
• PGAPPNAME - behaves the same as the application_name connection parameter.
• PGCONNECT_TIMEOUT - behaves the same as the connect_timeout connection parameter.
• PGPASSFILE - Specifies the name of the file used to store password.

Passfile support

Passfile is actually supported only on linux platform

Example

``` use pgclientconfig::load_config;

let config = load_config(Some("service=myservice")).unwrap(); println!("{config:#?}"); ```

Precedence rules

• Environment variables are always evaluated with the least precedence.
• Parameters passed in the connection string always take precedence.

See also

• Pg service file
• Pg pass file