templates: fix --executable, source discovery for more langs, test refactoring #15292

thesamesam · 2025-11-23T20:23:39Z

While adding some test coverage as a followup to some earlier changes, I found some other issues:

--executable wasn't (ever) behaving as desired;
some languages needed fixes like the others from yesterday.

mesonbuild/templates/cudatemplates.py

mesonbuild/templates/cstemplates.py

mesonbuild/templates/cudatemplates.py

Use `itertools.product()` to reduce an indentation level or two, though we lose one again by changing to a function for fresh vs dirty. I plan on adding more to these tests and it makes it a bit more manageable. Best-viewed-with: --ignore-all-space

* In 1.7.1, the behaviour of --executable was to just ignore it. * After my recent 9104bb6, the behaviour was that we'd require, for --executable xyz, xyz.c to exist or we'd fail to generate. Neither are good! Instead, create the sample source file w/ the project name, but call the executable whatever the user passed with `--executable`. Bug: mesonbuild#15286

I missed this in 9104bb6 as we were only testing whitelisted languages for source file discovery. Tests now handle all of these by using the map we have in compilers, as we need to know the suffix to use for the invalid source files we inject. Note that for tests, we mix explicit --lang in some cases and not others, which we could probably do better with. For these 'must fail' tests, I've stuck with explicit `--lang` to make sure we're testing what we want, but the others are perhaps up for debate. Bug: mesonbuild#15286

thesamesam requested a review from jpakkane as a code owner November 23, 2025 20:23

thesamesam added the init label Nov 23, 2025

thesamesam marked this pull request as draft November 23, 2025 20:50

thesamesam force-pushed the sam-meson-init branch from 3ad05be to 30a8859 Compare November 23, 2025 21:33

thesamesam marked this pull request as ready for review November 23, 2025 21:33

thesamesam force-pushed the sam-meson-init branch from 30a8859 to 86adbf9 Compare November 23, 2025 21:42

thesamesam changed the title ~~templates: test refactoring; fix --executable~~ templates: fix --executable, source discovery for more langs, test refactoring Nov 23, 2025

thesamesam force-pushed the sam-meson-init branch from 86adbf9 to d34d87a Compare November 23, 2025 21:59