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#!/usr/bin/env bash

#

# Computes the mean commit interval (in seconds).

#

# References:

#

# * Kolassa, Carsten, Dirk Riehle, and Michel A. Salim. 2013. "The Empirical Commit Frequency Distribution of Open Source Projects." In *Proceedings of the 9th International Symposium on Open Collaboration*, 18:1–:8. WikiSym '13. New York, NY, USA: ACM. doi:[10.1145/2491055.2491073](http://dx.doi.org/10.1145/2491055.2491073).

# Determine root directory:

root="$(git rev-parse --show-toplevel)"

# Define the path to a utility to compute commit intervals:

commit_intervals="${root}/tools/git/scripts/commit_intervals"

# Define the path to a utility to compute the arithmetic mean:

mean="${root}/tools/awk/mean.awk"

# * `commit_intervals`

# - Compute commit intervals.

# * `mean`

# - Compute the mean.

"${commit_intervals}" | "${mean}"