Added simple task to enter db console using your already configured d…

…atabase. Fixes #516 (#592)

src/avram/tasks/db/console.cr

@@ -0,0 +1,42 @@
+class Db::Console < LuckyCli::Task
+  summary "Access PostgreSQL console"
+
+  def help_message
+    <<-TEXT
+    #{summary}
+
+    Enters the postgres REPL. Check config/database.cr
+    for database configuration.
+
+    Examples:
+
+      lucky db.console
+
+    TEXT
+  end
+
+  def call
+    puts banner_message
+    system("psql #{Avram::Migrator::Runner.credentials.url_without_query_params}")
+  end
+
+  private def banner_message
+    String.build do |str|
+      str << banner_header
+      str << banner_help
+    end
+  end
+
+  private def banner_header
+    <<-MESSAGE.colorize(:green)
+    Entering PSQL for #{Avram::Migrator::Runner.db_name}
+
+    MESSAGE
+  end
+
+  private def banner_help
+    <<-MESSAGE.colorize.dim
+    Type '\\q' or 'exit' to leave
+    MESSAGE
+  end
+end