Add script to determine lib pkgs per year

kgryte · kgryte · commit de15a3fc397f · 2017-04-19T20:24:45.000-05:00
diff --git a/tools/git/scripts/lib_pkgs_per_year b/tools/git/scripts/lib_pkgs_per_year
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+#
+# Prints the approximate number of library packages per year.
+#
+# <year> <num_pkgs>
+
+# Determine root directory:
+root="$(git rev-parse --show-toplevel)"
+
+# Define the path to a utility to find when `package.json` files were added and deleted:
+pkg_json="${root}/tools/git/scripts/pkg_json_added_deleted"
+
+# * `pkg_json`
+#   - `package.json` additions and deletions.
+# * `awk '{}'`
+#   - Tabulate the yearly totals.
+# * `sort -k1n`
+#   - Sort the year numerically.
+# * `awk '{}'`
+#   - Format the output.
+"${pkg_json}" | awk '
+{
+	yr = $5
+}
+
+# Skip non-library `package.json`:
+$9 !~ /lib\/node_modules\/\@stdlib\// {
+	next
+}
+
+# Added a `package.json`:
+$8 == "A" {
+	pkgs[yr] += 1
+}
+
+# Deleted a `package.json`:
+$8 == "D" {
+	pkgs[yr] -= 1
+}
+
+END {
+	for (yr in pkgs) {
+		print yr OFS pkgs[yr]
+	}
+}
+' | sort -k1n | awk '{print $1 OFS $2}'
