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author_commit_intervals
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executable file
·34 lines (33 loc) · 924 Bytes
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#!/usr/bin/env bash
#
# Prints author commit intervals (in seconds).
#
# <interval> <author_first_name> <author_last_name>
#
# 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).
# * `git log`
# - Show the commit timestamp and author for each commit.
# * `sort -n`
# - Sort in numeric order.
# * `awk '{}'`
# - Compute the interval since the last commit,
git log --format=format:"%at %aN" --reverse | sort -n | awk '
{
ts = $1
first = $2
if (NF == 2) {
last = "(null)"
} else {
last = $3
}
key = first OFS last
if (key in prev) {
print (ts - prev[key]) OFS key
prev[key] = ts
} else {
prev[key] = ts
}
}
'