Release 0.37.0

Wednesday, June 3, 2026

New features

Profile the slowest tests

The new --profile flag reports your slowest tests after a run, so you can find what to speed up. It prints the top 10 by default, configurable with BASHUNIT_PROFILE_COUNT (#678):

bashunit --profile tests/
# show the 20 slowest
BASHUNIT_PROFILE_COUNT=20 bashunit --profile tests/

Project config with .bashunitrc

Drop a .bashunitrc file at the root of your project to set defaults for everyone, no environment variables required. Keys map to the same BASHUNIT_* options and only apply when not already set, so command-line flags still win (#681):

# .bashunitrc
BASHUNIT_PARALLEL_RUN=true
BASHUNIT_SHOW_OUTPUT=true
BASHUNIT_PROFILE_COUNT=15

Failures point to file:line

Failure output now tells you exactly where the failing test lives, appending at <file>:<line> so you can jump straight to it from your editor or CI log (#680).

Killed tests explain why

When a test process is killed, bashunit now classifies the cause instead of reporting a bare non-zero exit. Timeouts, SIGINT, SIGKILL/out-of-memory and SIGTERM each get a clear message (#683).

Readable snapshot diffs without git

Snapshot mismatches previously relied on git diff for a readable comparison. When git is not available, bashunit now renders its own line-by-line diff, so snapshot failures stay readable in minimal environments (#679).

Performance

This release trims forks and polling from the hot path:

• Result helpers return through global slots, dropping a subshell fork per call (#662).
• generate_id and normalize_variable_name drop their grep/random_str forks (#663).
• The coverage-enabled flag is cached instead of re-checked on every line (#664).
• The parallel runner uses wait -n on Bash 4.3+ instead of polling for finished jobs (#667).
• Runtime-error detection collapses into a single case glob (#668).

Bug fixes

• --strict no longer enables Bash 3.0's broken pipefail (which wrongly reports failing pipelines as successful); pipefail is applied only on Bash >= 3.1.
• bashunit watch now forwards --filter and other flags to the underlying run (#682).
• learn and coverage use mktemp -d for their temporary directories.
• parallel::cleanup refuses to rm -rf any path outside */bashunit/parallel/*.

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See the full changelog for 0.37.0 on GitHub.