27079234648

Committed 07 Jun 2026 01:30AM UTC coverage: 92.791% (+0.01%) from 92.78%

Build # 27079234648

Build Type

push

github

Committed by

web-flow

Commit Message

Compose a Process out of multiple sequential subprocesses (#23400)

It is sometimes useful to run multiple processes in a single
Process invocation. 

For example, when creating a pex from a venv repository,
we need to ensure the venv repository exists, and the 
only reliable way to do so in the presence of remote caching/
remote execution is to run the venv creation process 
in the same Process as the pex invocation.

This change introduces a bit of useful plumbing to make
this easy: A `CompositeProcess` holds multiple
`Subprocess` instances, and invokes them sequentially
via a bash command.

Coverage Stats

169 of 176 new or added lines in 3 files covered. (96.02%)

3 existing lines in 1 file now uncovered.

93106 of 100339 relevant lines covered (92.79%)

4.01 hits per line

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93.27

/src/python/pants/engine/composite_process.py

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