feat: Replace pendulum by home-made duration-to-words function

`pgcli` uses Pendulum to display the query execution time in words:

    > select pg_sleep(62)
    +----------+
    | pg_sleep |
    |----------|
    |          |
    +----------+
    SELECT 1
    Time: 62.066s (1 minute 2 seconds), executed in: 62.063s (1 minute 2 seconds)

Pendulum 3 (which has been released in December 2023 and is now
written in Rust) does not build on 32-bit architectures [1]. As such,
installing `pgcli` on such architectures fails. We could pin Pendulum
to version 2 (which was written in Python and builds "everywhere"),
but requiring a whole library and its own dependencies for such a
small feature seems unwarranted.

This commit thus removes the requirement on Pendulum and replaces it
by a simple "duration-to-words" function.

Fixes #1451.

[1] Upstream issue: https://github.com/sdispater/pendulum/issues/784

5 files changed, 52 insertions, 8 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 68a69acd..d9698ef4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,10 +67,6 @@ jobs:
 
             psql -h localhost -U postgres -p 6432 pgbouncer -c 'show help'
 
-      - name: Install beta version of pendulum
-        run: pip install pendulum==3.0.0b1
-        if: matrix.python-version == '3.12'
-
       - name: Install requirements
         run: |
           pip install -U pip setuptools
diff --git a/changelog.rst b/changelog.rst
index 9f0f573f..cb70bb8d 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -11,6 +11,7 @@ Bug fixes:
 * Fix display of "short host" in prompt (with `\h`) for IPv4 addresses ([issue 964](https://github.com/dbcli/pgcli/issues/964)).
 * Fix backwards display of NOTICEs from a Function ([issue 1443](https://github.com/dbcli/pgcli/issues/1443))
 * Fix psycopg errors when installing on Windows.  ([issue 1413](https://https://github.com/dbcli/pgcli/issues/1413))
+* Use a home-made function to display query duration instead of relying on a third-party library (the general behaviour does not change), which fixes the installation of `pgcli` on 32-bit architectures ([issue 1451](https://github.com/dbcli/pgcli/issues/1451))
 
 ==================
 4.0.1 (2023-10-30)
diff --git a/pgcli/main.py b/pgcli/main.py
index bbb1989d..cfa1c970 100644
--- a/pgcli/main.py
+++ b/pgcli/main.py
@@ -11,7 +11,6 @@ import logging
 import threading
 import shutil
 import functools
-import pendulum
 import datetime as dt
 import itertools
 import platform
@@ -800,9 +799,9 @@ class PGCli:
                         "Time: %0.03fs (%s), executed in: %0.03fs (%s)"
                         % (
                             query.total_time,
-                            pendulum.Duration(seconds=query.total_time).in_words(),
+                            duration_in_words(query.total_time),
                             query.execution_time,
-                            pendulum.Duration(seconds=query.execution_time).in_words(),
+                            duration_in_words(query.execution_time),
                         )
                     )
                 else:
@@ -1735,5 +1734,28 @@ def parse_service_info(service):
     return service_conf, service_file
 
 
+def duration_in_words(duration_in_seconds: float) -> str:
+    if not duration_in_seconds:
+        return "0 seconds"
+    components = []
+    hours, remainder = divmod(duration_in_seconds, 3600)
+    if hours > 1:
+        components.append(f"{hours} hours")
+    elif hours == 1:
+        components.append("1 hour")
+    minutes, seconds = divmod(remainder, 60)
+    if minutes > 1:
+        components.append(f"{minutes} minutes")
+    elif minutes == 1:
+        components.append("1 minute")
+    if seconds >= 2:
+        components.append(f"{int(seconds)} seconds")
+    elif seconds >= 1:
+        components.append("1 second")
+    elif seconds:
+        components.append(f"{round(seconds, 3)} second")
+    return " ".join(components)
+
+
 if __name__ == "__main__":
     cli()
diff --git a/setup.py b/setup.py
index f9dbc56a..640dca00 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,6 @@ install_requirements = [
     "psycopg-binary >= 3.0.14; sys_platform == 'win32'",
     "sqlparse >=0.3.0,<0.5",
     "configobj >= 5.0.6",
-    "pendulum>=2.1.0",
     "cli_helpers[styles] >= 2.2.1",
 ]
 
diff --git a/tests/test_main.py b/tests/test_main.py
index cbf20a6a..0aeba80e 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -11,6 +11,7 @@ except ImportError:
 
 from pgcli.main import (
     obfuscate_process_password,
+    duration_in_words,
     format_output,
     PGCli,
     OutputSettings,
@@ -488,3 +489,28 @@ def test_application_name_db_uri(tmpdir):
     mock_pgexecute.assert_called_with(
         "bar", "bar", "", "baz.com", "", "", application_name="cow"
     )
+
+
+@pytest.mark.parametrize(
+    "duration_in_seconds,words",
+    [
+        (0, "0 seconds"),
+        (0.0009, "0.001 second"),
+        (0.0005, "0.001 second"),
+        (0.0004, "0.0 second"),  # not perfect, but will do
+        (0.2, "0.2 second"),
+        (1, "1 second"),
+        (1.4, "1 second"),
+        (2, "2 seconds"),
+        (3.4, "3 seconds"),
+        (60, "1 minute"),
+        (61, "1 minute 1 second"),
+        (123, "2 minutes 3 seconds"),
+        (3600, "1 hour"),
+        (7235, "2 hours 35 seconds"),
+        (9005, "2 hours 30 minutes 5 seconds"),
+        (86401, "24 hours 1 second"),
+    ],
+)
+def test_duration_in_words(duration_in_seconds, words):
+    assert duration_in_words(duration_in_seconds) == words