Add script to compute the number of additions per day

kgryte · kgryte · commit a9e5ac75f1da · 2016-10-18T00:00:32.000-07:00
diff --git a/tools/git/scripts/additions_per_day b/tools/git/scripts/additions_per_day
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# Prints the number of additions per day.
+
+# Determine root directory:
+root="$(git rev-parse --show-toplevel)"
+
+# Define the path to a utility to generate commit short stats:
+shortstats="${root}/tools/git/scripts/shortstats"
+
+# * `shortstats`
+#   - Get summary statistics for each commit.
+# * `awk '{}'`
+#   - Tabulate the daily totals.
+# * `sort -n`
+#   - Sort in numeric order.
+# * `perl -pe ''`
+#   - Convert each Unix timestamp to a date string.
+# * `awk '{}'`
+#   - Format the output.
+"${shortstats}" | awk '
+BEGIN {
+	scalar = 60 * 60 * 24
+}
+{
+	# Round a Unix timestamp to the nearest day:
+	ts = int($1/scalar) * scalar
+
+	# Update daily totals:
+	lines[ts] += $5
+}
+END {
+	for ( ts in lines ) {
+		print ts OFS lines[ts]
+	}
+}
+' | sort -n | perl -pe 's/(\d+)/gmtime($1)/e' | awk '{print $6 OFS $2 OFS $3 OFS $5}'
