Instance (libpq) environment

Command pglift instance env gives access to the libpq environment for target instance.

$ pglift instance env 14/main
PATH=/usr/lib/postgresql/14/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
PGDATA=/home/dba/.local/share/pglift/srv/pgsql/14/main/data
PGHOST=/home/dba/.local/share/pglift/run/postgresql
PGPASSFILE=/home/dba/.pgpass
PGPORT=5456
PGUSER=postgres
PSQLRC=/home/dba/.local/share/pglift/srv/pgsql/14/main/data/.psqlrc
PSQL_HISTORY=/home/dba/.local/share/pglift/srv/pgsql/14/main/data/.psql_history

This can be used in shell scripts. For instance:

#!/bin/sh
export $(pglift instance env main)
psql -d db -c 'select 1'
pg_dump -d db > db.sql