meson: regenerate config-list.h when Documentation changes
The Meson-based build doesn't know when to rebuild config-list.h, so the header is sometimes stale.
For example, an old build directory might have config-list.h from before 4173df51 (submodule: introduce extensions.submodulePathConfig, 2026-01-12), which added submodule..gitdir to the list. Without it, t9902-completion.sh fails. Regenerating the config-list.h artifact from sources fixes the artifact and the test.
Teach the meson build to depend on the Documentation files that generate-configlist.sh reads by having it an additional output as a list of dependency files, since Meson does not have (or want) builtin support for globbing like Make. We assume that if a user adds a new file under Documentation/config then they will also edit one of the existing files to include that new file, and that will trigger a rebuild.
Also mark the generator script as a dependency.
Combining the following commands helps debug dependencies:
ninja -C <builddir> -t deps config-list.h
ninja -C <builddir> -t browse config-list.hThe former lists all the dependencies discovered from our output ".d" file (the config documentation) and the latter shows the dependency on the script itself, among other useful edges in the dependency graph.
Helped-by: Patrick Steinhardt ps@pks.im Helped-by: Phillip Wood phillip.wood@dunelm.org.uk Signed-off-by: D. Ben Knoble ben.knoble+github@gmail.com