Support detached Gadi Pixi environments in PETSc builds - #516
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Replace the hard-coded .pixi environment path test with validation of the active hpc environment, project root, Conda prefix, and Python executable so detached environments on scratch are accepted safely. Prioritize the Pixi C++ runtime during Gadi configure and petsc4py builds for NumPy 2 compatibility, derive build concurrency from PBS_NCPUS instead of oversubscribing with 40 jobs, and update versioned PETSc architecture diagnostics. Also replace legacy which calls and resolve ShellCheck declaration warnings.
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Summary
hpcenvironments by validating the active environment name, project root, Conda prefix, and Python executable instead of requiring a hard-coded.pixi/envs/hpcpathPBS_NCPUS, with a safe login-shell fallback, instead of hard-coding 40 jobsThis is a focused cherry-pick of
c42b9b39fromfeature/mantle-convection-benchmarks; no mantle-convection implementation commits are included.Validation
bash -n petsc-custom/build-petsc.shgit diff --check upstream/development...HEADhpcprefix with the correct project rootPBS_NCPUS/scratch: NumPy 2.4.6, OpenMPI 4.1.7, PETSc 3.25.4, parallel h5py, and editable UW3 import successfully