1

I have a command that spews json to stdout like so:

foo inf --db

{
    "Name": "A rose by any any other",
    "Config": {
        "DBHost": "abc.efg.us-east-1.rds.amazonaws.com",
        "DBName": "bsghshsgh",
        "DBUser": "bshshs",
        "DBPassword": "secret"
    }
}

I'd like to echo the contents of DBPasswod to the screen and then execute a pgsql command with the other paramaters like so. So far I can concatenate a string to send to stdout like so:

foo inf --db | jq '"password: " + .Config.DBPassword + "; psql -h " + .Config.DBHost + " -U " + .Config.DBUser + " " + .Config.DBName'

How do I just echo the password to stdout and execute the pgsql command?

2

Your JSON is malformed. Also, you should probably reconsider the sanity of this approach. But if you insist to do it this way, you might try something like this:

foo inf --db | \
    jq -r '.Config | .DBPassword, .DBHost, .DBUser, .DBName' | \
    {
        read -r PGPASSWORD
        read -r host
        read -r user
        read -r db

        psql -h "$host" -U "$user" "$db"                
    }

(cf. libpq-envars for PGPASSWORD).

  • Well Ubuntu isn't respecting $PGPASSWORD, or any of the other variable, but otherwise this basically works. – Justin Dearing Nov 16 '16 at 15:44

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