A student Spark can be barebone: no git, no sudo, Apptainer only, and an
account that exports APPTAINER_TMPDIR=/scratch/$USER/... for a directory
that does not exist, so every image pull failed ("failed to create build
parent dir"). Students now run one line:
wget -qO- .../raw/branch/main/install.sh | bash
install.sh (wrapped in main() so a piped run cannot lose its tail):
- repairs APPTAINER_TMPDIR / APPTAINER_CACHEDIR (and SINGULARITY_*) that
point nowhere and records the choice in ~/quantcore/quantcore.env
- gets the code with git, or with git from a container (alpine/git) when
the machine has none; Gitea's archive download answers 502
- runs qc.sh install, imports --data FILE|URL or builds the data from
Yahoo, starts the services, runs the self-test, links ~/.local/bin/qc
- running it again updates: rebuild and restart only when the code changed
qc.sh:
- the same directory repair before every pull or build, with one helper
for all pulls and a clear message when a download fails
- health checks over bash's /dev/tcp when neither curl nor python3 exists
- instance logs found for domain accounts and shared network homes
- works when called through the ~/.local/bin/qc link; new commands
`upgrade` (runs install.sh) and `has-data`
- the virtualenv build copies the sources under QC_HOME, not $TMPDIR
Tested on a stripped-down machine (no git/curl/wget/python3, home
/home/name@edu.local, APPTAINER_TMPDIR on a missing /scratch): install,
start and self-test pass; `qc upgrade` rebuilt and restarted after a new
commit; `qc setup` built a data set inside the container.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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