tmp-postgres

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Create temporary postgres instances

tmp-postgres 최신버젼 다운로드

최종 버전 다운로드 (.zip)

// repository documentation

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# tmp-postgres

`tmp-postgres` provides functions for creating a temporary `postgres` instance.
By default it will create a temporary data directory and
a temporary directory for a UNIX domain socket for `postgres` to listen on.

Here is an example using the exception-safe 'with' function:

```haskell
with $ \db -> bracket
  (connectPostgreSQL (toConnectionString db))
  close $
  \conn -> execute_ conn "CREATE TABLE foo (id int)"
```

To extend or override the defaults use `withConfig` (or `startConfig`).

`tmp-postgres` ultimately calls `initdb` (optionally) , `postgres` and
`createdb` (optionally).

All of the command line, environment variables and configuration files
that are generated by default for the respective executables can be
extended.

In general `tmp-postgres` is useful if you want a clean temporary
`postgres` and do not want to worry about clashing with an existing
postgres instance (or needing to ensure `postgres` is already running).

Here are some different use cases for `tmp-postgres` and their respective
configurations:

* The default 'with' and 'start' functions can be used to make a sandboxed
temporary database for testing.
* By disabling `initdb` one could run a temporary
isolated postgres on a base backup to test a migration.
* By using the 'stopPostgres' and 'withRestart' functions one can test
backup strategies.

WARNING!!
Ubuntu's PostgreSQL installation does not put `initdb` on the `PATH`. We need to add it manually.
The necessary binaries are in the `/usr/lib/postgresql/VERSION/bin/` directory, and should be added to the `PATH`

> echo "export PATH=$PATH:/usr/lib/postgresql/VERSION/bin/" >> /home/ubuntu/.bashrc

# Installation

## macOS
```
$ brew install postgres
$ stack install tmp-postgres
```

## Ubuntu

Ubuntu's PostgreSQL installation does not put `initdb` on the PATH. We need to add it manually.

```
$ sudo apt-get install postgresql-VERSION
$ echo "export PATH=$PATH:/usr/lib/postgresql/VERSION/bin/" >> /home/ubuntu/.bashrc
$ stack install tmp-postgres
```

## GitHub Actions

Assuming you are using one of the standard workflow containers, simply add workflow steps which install postgresql as above.  For example,

``` yaml
jobs:
  build:
    runs-on: ubuntu-18.04
    steps:
      - name: "Install postgresql"
        run: "sudo apt-get update && sudo apt-get install postgresql-10"

# ...

- name: "Run test"
        run: |
          export PATH=$PATH:/usr/lib/postgresql/10/bin
          stack test
```

tmp-postgres

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