# pg-embed
[](http://crates.io/crates/pg-embed)
[](https://docs.rs/pg-embed)
[](http://crates.io/crates/pg-embed)
[](https://github.com/faokunega/pg-embed/blob/master/LICENSE)
Run a Postgresql database locally on Linux, MacOS or Windows as part of another Rust application or test.
The currently supported async runtime for **pg-embed** is [tokio](https://crates.io/crates/tokio).
Support for [async-std](https://crates.io/crates/async-std) and [actix](https://crates.io/crates/actix) is planned
and will be available soon.
# Usage
- Add pg-embed to your Cargo.toml
*Library without sqlx migration support*
```toml
# Cargo.toml
[dependencies]
pg-embed = { version = "0.4", default-features = false, features = ["rt_tokio"] }
```
*Library with sqlx migration support*
```toml
# Cargo.toml
[dependencies]
pg-embed = "0.4"
```
A postgresql instance can be created using<br/>
**[PgEmbed]( postgres::PgEmbed )::new([PgSettings]( postgres::PgSettings ), [FetchSettings]( fetch::FetchSettings ))**
# Examples
```
use pg_embed::postgres::{PgEmbed, PgSettings};
use pg_embed::fetch;
use pg_embed::fetch::{OperationSystem, Architecture, FetchSettings, PG_V13};
use std::time::Duration;
/// Postgresql settings
let pg_settings = PgSettings{
/// Where to store the postgresql executables
executables_dir: "data/postgres".to_string(),
/// Where to store the postgresql database
database_dir: "data/db".to_string(),
port: 5432,
user: "postgres".to_string(),
password: "password".to_string(),
/// authentication method
auth_method: PgAuthMethod::Plain,
/// If persistent is false clean up files and directories on drop, otherwise keep them
persistent: false,
start_timeout: Duration::from_secs(15),
/// If migration sql scripts need to be run, the directory containing those scripts can be
/// specified here with `Some(path_to_dir), otherwise `None` to run no migrations.
/// To enable migrations view the **Usage** section for details
migration_dir: None,
};
/// Postgresql binaries download settings
let fetch_settings = FetchSettings{
host: "https://repo1.maven.org".to_string(),
operating_system: OperationSystem::Darwin,
architecture: Architecture::Amd64,
version: PG_V13
};
/// Create a new instance
let mut pg = PgEmbed::new(pg_settings, fetch_settings);
/// async block only to show that these methods need to be executed in an async context
async {
/// Download, unpack, create password file and database cluster
pg.setup().await;
/// start postgresql database
pg.start_db().await;
/// create a new database
/// to enable migrations view the **Usage** section for details
pg.create_database("database_name").await;
/// drop a new database
/// to enable migrations view [Usage] for details
/// to enable migrations view the **Usage** section for details
pg.drop_database("database_name").await;
/// check database existence
/// to enable migrations view [Usage] for details
/// to enable migrations view the **Usage** section for details
pg.database_exists("database_name").await;
/// run migration sql scripts
/// to enable migrations view [Usage] for details
/// to enable migrations view the **Usage** section for details
pg.migrate("database_name").await;
};
/// get the base postgresql uri
/// `postgres://{username}:{password}@localhost:{port}`
let pg_uri: &str = &pg.db_uri;
/// get a postgresql database uri
/// `postgres://{username}:{password}@localhost:{port}/{specified_database_name}`
let pg_db_uri: String = pg.full_db_uri("database_name");
/// stop postgresql database
pg.stop_db();
```
## Recent Breaking Changes
pg-embed follows semantic versioning, so breaking changes should only happen upon major version bumps. The only exception to this rule is breaking changes that happen due to implementation that was deemed to be a bug, security concerns, or it can be reasonably proved to affect no code. For the full details, see [CHANGELOG.md](https://github.com/faokunega/pg-embed/blob/master/CHANGELOG.md).
## License
pg-embed is licensed under the MIT license. Please read the [LICENSE-MIT](https://github.com/faokunega/pg-embed/blob/master/LICENSE) file in this repository for more information.
# Notes
Reliant on the great work being done by [zonkyio/embedded-postgres-binaries](https://github.com/zonkyio/embedded-postgres-binaries) in order to fetch precompiled binaries from [Maven](https://mvnrepository.com/artifact/io.zonky.test.postgres/embedded-postgres-binaries-bom).