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CI: one recipe at a time on every platform (temporarily, rattler-build#2898) #162

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Merged
Tobias-Fischer merged 1 commit into from
Oct 25, 2026
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CI: one recipe at a time on every platform (temporarily, rattler-build#2898) #162

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6 changes: 5 additions & 1 deletion tools/robostack.py
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Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,11 @@ def run_tee(cmd: list[str], cwd: Path) -> tuple[int, bytes]:

# a build job's recipes side by side, with a shared jobserver keeping them at the runner's
# cores in total; Windows has no jobserver, and was no faster with two (#154)
PARALLEL_BUILDS = "1" if sys.platform == "win32" else f"3:{os.cpu_count()}"
# Temporarily one at a time everywhere: rattler-build 0.77 gives two variants of a recipe
# started in the same second the same build directory, and they fail ("Path ... already
# exists", prefix-dev/rattler-build#2898, e.g. beluga's hdf5 variants). Back to
# f"3:{os.cpu_count()}" off Windows once prefix-dev/rattler-build#2899 is released.
PARALLEL_BUILDS = "1"


def build_ci_parallel(distro: str, recipes: list[str], args: list[str], cwd: Path) -> int:
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