add(configuration): ability to store configuration in [tool:qgis-plugin-ci] section in plugin's metadata.txt

docs/configuration/options.md

@@ -7,6 +7,7 @@ The plugin must have a configuration, located at the top directory; it can be ei
 - a YAML file named `.qgis-plugin-ci`
 - an INI file named `setup.cfg` with a `[qgis-plugin-ci]` section
 - a TOML file (= your actual `pyproject.toml` file) with a `[tool.qgis-plugin-ci]` section.
+- a section `[tool:qgis-plugin-ci]` in the plugin's metadata.txt, but `plugin_path` at least has to defined in one of the above configuration files
 
 In the configuration, you should at least provide the following configuration:
 
@@ -65,3 +66,36 @@ plugin_path = "qgis_plugin_ci_testing"
 github_organization_slug = "opengisch"
 project_slug = "qgis-plugin-ci"
 ```
+
+### Combining minimal configuration with `metadata.txt`
+
+When the main configuration file only sets `plugin_path` (and optionally `changelog_path`), qgis-plugin-ci will look for a `[tool:qgis-plugin-ci]` section in  `{plugin_path}/metadata.txt` and merge any options found there. Values in the main config file always take precedence.
+
+This allows reducing the main config file to a single line:
+
+```yaml
+# .qgis-plugin-ci
+plugin_path: qtribu
+```
+
+With the remaining options in `qtribu/metadata.txt`:
+
+```ini
+[general]
+name=QTribu
+[...]
+
+[tool:qgis-plugin-ci]
+create_date = 2021-03-02
+github_organization_slug=geotribu
+project_slug=qtribu
+repository_url_raw = https://raw.githubusercontent.com/geotribu/qtribu/
+repository_plugin_id = 2733
+timezone=Europe/Paris
+```
+
+If `metadata.txt` is missing at the expected path, or if the `[tool:qgis-plugin-ci]` section is missing, a warning is emitted and qgis-plugin-ci continues with the minimal configuration.
+
+:::{note}
+The `[tool:qgis-plugin-ci]` section is already used by qgis-plugin-ci at packaging time to write runtime values (`commitNumber`, `commitSha1`, `dateTime`). Static configuration options and runtime-written keys can coexist in the same section.
+:::

docs/partials/_extra_plugin_metadata.md

@@ -17,4 +17,8 @@ commitSha1=
 dateTime=
 ```
 
+This same section can also hold **static configuration options**
+(e.g. `github_organization_slug`, `timezone`) when the main config file contains
+only `plugin_path`. See [Minimal configuration with `metadata.txt`](../configuration/options.md#combining-minimal-configuration-with-metadata-txt).
+
 :::

qgispluginci/parameters.py

@@ -153,6 +153,18 @@ def make_from(
         )
 
         def load_config(path_to_config_file: Path, file_name: str) -> dict[str, Any]:
+            """Load configuration from a file.
+
+            Args:
+                path_to_config_file (Path): path to the configuration file.
+                file_name (str): file name.
+
+            Raises:
+                configuration_not_found: if any proper configuration is found in the file.
+
+            Returns:
+                dict[str, Any]: configuration as dict
+            """
             if file_name == "setup.cfg":
                 config = configparser.ConfigParser()
                 config.read(path_to_config_file)
@@ -197,6 +209,39 @@ def explore_config() -> dict[str, Any]:
             config_dict = load_config(path_to_config_file, file_name)
         else:
             config_dict = explore_config()
+
+        # load config from metadata.txt
+        _extra_config_keys = {
+            k for k in config_dict if k not in ("plugin_path", "changelog_path")
+        }
+        if config_dict.get("plugin_path") and not _extra_config_keys:
+            _metadata_txt = Path(config_dict["plugin_path"]) / "metadata.txt"
+            if not _metadata_txt.is_file():
+                logger.warning(
+                    f"Config only defines 'plugin_path' but {_metadata_txt.resolve()} "
+                    "does not exist. Add a '[tool:qgis-plugin-ci]' section in "
+                    "metadata.txt to configure remaining options."
+                )
+            else:
+                _meta_cfg = configparser.ConfigParser()
+                _meta_cfg.read(_metadata_txt)
+                if not _meta_cfg.has_section("tool:qgis-plugin-ci"):
+                    logger.warning(
+                        f"No [tool:qgis-plugin-ci] section found in "
+                        f"{_metadata_txt.resolve()}. "
+                        "Add it to avoid keeping a separate config file."
+                    )
+                else:
+                    _meta_dict = dict(_meta_cfg.items("tool:qgis-plugin-ci"))
+                    config_dict = {
+                        **_meta_dict,
+                        **config_dict,
+                    }
+                    logger.info(
+                        f"Loaded config from {_metadata_txt.resolve()} "
+                        f"[tool:qgis-plugin-ci]: {_meta_dict}"
+                    )
+
         return cls(config_dict)
 
     def __init__(self, definition: dict[str, Any]):

test/test_parameters.py

@@ -1,6 +1,8 @@
 #! /usr/bin/env python
 
 # standard
+import os
+import tempfile
 import unittest
 from datetime import datetime
 from pathlib import Path
@@ -11,6 +13,24 @@
 
 
 class TestParameters(unittest.TestCase):
+    # -- helpers ----------------------------------------------------------
+
+    @staticmethod
+    def _minimal_metadata(plugin_dir: Path) -> None:
+        """Write a valid metadata.txt with all mandatory fields."""
+        (plugin_dir / "metadata.txt").write_text(
+            data="[general]\n"
+            "name=Quicui\n"
+            "about=Lorem ipsum GIS ergo sum\n"
+            "description=Test plugin\n"
+            "qgisMinimumVersion=3.44.10\n"
+            "author=Former Esri repentant\n"
+            "homepage=https://opengisch.github.io/qgis-plugin-ci/\n"
+            "tracker=https://github.com/opengisch/qgis-plugin-ci/issues\n"
+            "repository=https://github.com/opengisch/qgis-plugin-ci\n",
+            encoding="UTF-8",
+        )
+
     def test_changelog_parameters(self):
         """Test parameters for changelog command."""
         # For the changelog command, the configuration file is optional.
@@ -46,3 +66,88 @@ def test_plugin_repo_url_from_config(self):
         self.assertEqual(
             "https://opengisch.github.io/qgis-plugin-ci/", parameters.plugin_repo_url
         )
+
+    def test_metadata_txt_ci_section_merged_when_plugin_path_only(self):
+        """[tool:qgis-plugin-ci] from metadata.txt is merged when config only defines plugin_path."""
+        original_dir = Path.cwd()
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            try:
+                os.chdir(tmp_dir)
+                plugin_dir = Path(tmp_dir) / "my_plugin"
+                plugin_dir.mkdir()
+                self._minimal_metadata(plugin_dir)
+                # Append [tool:qgis-plugin-ci] section
+                with (plugin_dir / "metadata.txt").open("a") as fh:
+                    fh.write(
+                        "\n[tool:qgis-plugin-ci]\n"
+                        "github_organization_slug=my_org\n"
+                        "project_slug=my_project\n"
+                        "timezone=Europe/Paris\n"
+                    )
+                config_file = Path(tmp_dir) / ".qgis-plugin-ci"
+                config_file.write_text("plugin_path: my_plugin\n")
+
+                parameters = Parameters.make_from(path_to_config_file=config_file)
+
+                self.assertEqual("my_org", parameters.github_organization_slug)
+                self.assertEqual("my_project", parameters.project_slug)
+                self.assertEqual("Europe/Paris", parameters.timezone)
+            finally:
+                os.chdir(original_dir)
+
+    def test_missing_ci_section_in_metadata_txt_logs_warning(self):
+        """A warning is logged when metadata.txt exists but has no [tool:qgis-plugin-ci] section."""
+        original_dir = Path.cwd()
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            try:
+                os.chdir(tmp_dir)
+                plugin_dir = Path(tmp_dir) / "my_plugin"
+                plugin_dir.mkdir()
+                self._minimal_metadata(plugin_dir)
+                config_file = Path(tmp_dir) / ".qgis-plugin-ci"
+                config_file.write_text("plugin_path: my_plugin\n")
+
+                with self.assertLogs("qgispluginci.parameters", level="WARNING") as cm:
+                    Parameters.make_from(path_to_config_file=config_file)
+
+                self.assertTrue(
+                    any("tool:qgis-plugin-ci" in msg for msg in cm.output),
+                    "Expected a warning mentioning [tool:qgis-plugin-ci]",
+                )
+            finally:
+                os.chdir(original_dir)
+
+    def test_missing_metadata_txt_logs_warning(self):
+        """A warning is logged when metadata.txt itself is absent."""
+        original_dir = Path.cwd()
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            try:
+                os.chdir(tmp_dir)
+                config_file = Path(tmp_dir) / ".qgis-plugin-ci"
+                config_file.write_text("plugin_path: ghost_plugin\n")
+
+                with self.assertLogs("qgispluginci.parameters", level="WARNING") as cm:
+                    with self.assertRaises(FileNotFoundError):
+                        Parameters.make_from(path_to_config_file=config_file)
+
+                self.assertTrue(
+                    any(
+                        "ghost_plugin" in msg and "metadata.txt" in msg
+                        for msg in cm.output
+                    ),
+                    "Expected a warning mentioning the missing metadata.txt path",
+                )
+            finally:
+                os.chdir(original_dir)
+
+    def test_metadata_txt_not_checked_when_config_has_extra_keys(self):
+        """metadata.txt is not consulted when the config file has more than plugin_path."""
+        # Fixture has github_organization_slug in addition to plugin_path → new block must NOT trigger.
+        # If it were triggered and merged a metadata.txt section with conflicting values,
+        # the assertion below would still pass (config file takes priority), but any warning
+        # log would betray the wrong code path.
+        with self.assertNoLogs("qgispluginci.parameters", level="WARNING"):
+            parameters = Parameters.make_from(
+                path_to_config_file=Path("test/fixtures/.qgis-plugin-ci")
+            )
+        self.assertEqual("opengisch", parameters.github_organization_slug)