Document ci_config.json has_provides key

Author: bgilbert

README.md

@@ -59,7 +59,8 @@ name and the value is a dictionary containing with the following keys:
 | `debian_packages`       | (Optional) List of extra packages that will be installed on Debian-like CI runners. Dependencies that can be provided by other wraps should not be added here because it's better to test that fallbacks work. When running `tools/sanity_checks.py` locally, this list will be printed but not installed. |
 | `msys_packages`         | (Optional) List of extra packages that will be installed on MSYS CI runners.                                                                                                                                                                                                                         |
 | `python_packages`       | (Optional) List of extra Python packages that will be installed on all CI runners.                                                                                                                                                                                                                   |
-| `fatal_warnings`        | (Optional) If set to `false` removes --fatal-meson-warning. Use this only when there is no other way to fix the warning.                                                                                                                                                                             |
+| `fatal_warnings`        | (Optional) If set to `false` removes `--fatal-meson-warnings`. Use this only when there is no other way to fix the warning.                                                                                                                                                                             |
+| `has_provides`          | (Optional) If set to `false`, the project will not be expected to declare any dependency or program names, e.g. for projects that only provide plugins for another project.                                                                                                                          |
 | `skip_dependency_check` | (Optional) List of platform-specific dependency names that are not always provided by the project.                                                                                                                                                                                                   |
 | `skip_program_check`    | (Optional) List of platform-specific program names that are not always provided by the project.                                                                                                                                                                                                      |
 | `test_options`          | (Optional) List of arguments that will be passed to `meson test` command (e.g. `--timeout-multiplier`, `--no-suite`).                                                                                                                                                                                |

tools/sanity_checks.py

@@ -175,6 +175,7 @@ class CiConfigProject(T.TypedDict, total=False):
         msys_packages: list[str]
         python_packages: list[str]
         fatal_warnings: bool
+        has_provides: bool
         skip_dependency_check: list[str]
         skip_program_check: list[str]
         test_options: list[str]