postgresql_db: add support for directory format

[Andersson007]

SUMMARY

postgresql_db: add support for directory format

Fixes #83

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

postgresql_db

[Andersson007]

cc @tcraxs @kostiantyn-nemchenko

[Andersson007]

cc @andytom @landryb

[landryb]

i've manually backported the bits added to the 2.7.7+dfsg-1 version i'm using here, and successfully tested a dump/restore via a directory using this snippet:

- name: sync databases
  hosts: db
  tasks:
  - name: dump db
    postgresql_db:
      login_password: "{{ postgresql_roles['root']['pass'] }}"
      name: dict_reseaux
      state: dump
      target: /tmp/dict_reseaux.dir

  - name: restore db
    postgresql_db:
      login_password: "{{ postgresql_roles['root']['pass'] }}"
      name: dict_reseaux
      state: restore
      target: /tmp/dict_reseaux.dir
      target_opts: --clean --if-exists

thanks !!

[Andersson007]

@landryb thanks for testing!

[Andersson007]

Do other contributors / maintainers have any ideas?

[tcraxs]

LGTM

[Andersson007]

@landryb @tcraxs thanks for reviewing!