Table of Contents

• About
  • Why?
  • Design
• Usage
• Development
  • Component Rationale
  • Local MongoDB
  • Documentation
• License

About

A simple command line wrapper for repeated runs, with metadata and lightweight tracking.

Why?

During development, a full interface to HPC oriented workflow engines like AiiDA, Fireworks, Jobflow, and the like is typically too heavy, and more importantly, the API is often not stable. That being said, this could also be used in conjunction with pychum and workflow runners like Snakemake to store

Design

File (gzip) Writer

This overrides the Log levels of Rust, so:

• TRACE is for additional information for the command, as written by bless
• INFO corresponds to stdout of the command
• ERROR corresponds to a bless error
• WARN corresponds to stderr of the command

MongoDB Writer

Only stderr and stdout of the command are stored in a .gz file which is added to the database as a binary blob, with additional metadata.

Usage

cargo build --release
MONGODB_URI="mongodb://localhost:27017/" ./target/release/bless --use-mongodb -- echo "bye"
# Then view it in mongosh
# or
./target/release/bless -- echo "bye"
zcat default_label*.gz

Development

Component Rationale

• Duct: For the gotchas
• Wild: For cross-platform globs
• Flate2: For compression
• UUID: For the unique IDs
• Fern: For log handling

Local MongoDB

Assuming pixi is used to get an instance of mongod.

pixi run mongod --dbpath $(pwd)/data/database
MONGODB_URI="mongodb://localhost:27017/" ./target/release/bless --use-mongodb -- $CMD_TO_RUN

I use npx mongosh for validating commands.

npx mongsh
use local
# Show all entries
db.commands.find()
# Suppress blob data
db.commands.find({}, { gzip_blob: 0 })
# Dangerous, drop all entries!
db.getCollectionNames().forEach(c=>db[c].drop())

Extracting run output

Since the .gzip is stored as binary data keyed to the entry, a small helper script is provided.

python scripts/get_db_gzip.py --db-name local --collection-name commands --query-field args --query-value orca.inp

Documentation

Readme

The readme can be constructed via:

./scripts/org_to_md.sh readme_src.org readme.md

metadata more generically.

License

MIT. However, this is an academic resource, so please cite as much as possible via:

• The Zenodo DOI for general use.
• TBD a publication