Addigcparameter1

[DiegoDAF]

Description

Like in psql command, where you can use -c/--command to run a single command (SQL or internal) and exit, I added the same behavior to pgcli.

Some screenshots:

Tests:

(pgcli.dev) daf@d:tests$ ## particularmente este
/home/daf/scripts/pgcli/pgcli.dev/.venv/bin/behave features/command_option.feature
USING RUNNER: behave.runner:Runner
package root: /home/daf/scripts/pgcli/pgcli.dev
fixture dir: /home/daf/scripts/pgcli/pgcli.dev/tests/features/fixture_data
Created connection: {}.
Created connection: {}.
Pgbouncer is not available.
reading fixture data: /home/daf/scripts/pgcli/pgcli.dev/tests/features/fixture_data/
--- os.environ changed values: ---
BEHAVE_WARN="moderate"
COLUMNS="100"
COVERAGE_PROCESS_START="/home/daf/scripts/pgcli/pgcli.dev/.coveragerc"
EDITOR="ex"
LINES="100"
PGDATABASE="pgcli_behave_tests_3_10_17"
PGSERVICEFILE="/home/daf/scripts/pgcli/pgcli.dev/tests/features/fixture_data/mock_pg_service.conf"
PROMPT_TOOLKIT_NO_CPR="1"
VISUAL="ex"
XDG_CONFIG_HOME="/tmp/pgcli_home__5nyw4bu"
--------------------
Feature: run the cli with -c/--command option, # features/command_option.feature:1
  execute a single command,
  and exit
  Scenario: run pgcli with -c and a SQL query           # features/command_option.feature:5
    When we run pgcli with -c "SELECT 1 as test_column" # features/steps/command_option.py:9 0.355s
    Then we see the query result                        # features/steps/command_option.py:63 0.000s
    And pgcli exits successfully                        # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with --command and a SQL query              # features/command_option.feature:10
    When we run pgcli with --command "SELECT 'hello' as greeting" # features/steps/command_option.py:36 0.355s
    Then we see the query result                                  # features/steps/command_option.py:63 0.000s
    And pgcli exits successfully                                  # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with -c and a special command  # features/command_option.feature:15
    When we run pgcli with -c "\dt"                  # features/steps/command_option.py:9 0.372s
    Then we see the command output                   # features/steps/command_option.py:88 0.000s
    And pgcli exits successfully                     # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with -c and an invalid query                           # features/command_option.feature:20
    When we run pgcli with -c "SELECT invalid_column FROM nonexistent_table" # features/steps/command_option.py:9 0.363s
    Then we see an error message                                             # features/steps/command_option.py:97 0.000s
    And pgcli exits successfully                                             # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with -c and multiple statements  # features/command_option.feature:25
    When we run pgcli with -c "SELECT 1; SELECT 2"     # features/steps/command_option.py:9 0.364s
    Then we see both query results                     # features/steps/command_option.py:78 0.000s
    And pgcli exits successfully                       # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with multiple -c options  # features/command_option.feature:30
    When we run pgcli with multiple -c options  # features/steps/command_option.py:126 0.358s
    Then we see all command outputs             # features/steps/command_option.py:183 0.000s
    And pgcli exits successfully                # features/steps/command_option.py:108 0.000s

  Scenario: run pgcli with mixed -c and --command options  # features/command_option.feature:35
    When we run pgcli with mixed -c and --command          # features/steps/command_option.py:155 0.397s
    Then we see all command outputs                        # features/steps/command_option.py:183 0.000s
    And pgcli exits successfully                           # features/steps/command_option.py:108 0.000s

1 feature passed, 0 failed, 0 skipped
7 scenarios passed, 0 failed, 0 skipped
21 steps passed, 0 failed, 0 skipped
Took 0min 2.565s

pyTests: 2667 passed, 1 xfailed, 1 xpassed in 27.88s

Checklist

• I've added this contribution to the changelog.rst.
• I've added my name to the AUTHORS file (or it's already there).

• I installed pre-commit hooks (pip install pre-commit && pre-commit install).
• Please squash merge this pull request (uncheck if you'd like us to merge as multiple commits)