docs: add code metrics scripts

scripts/stats-assemble.sh

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+#!/bin/bash
+
+DIR=$(dirname "$0")
+
+# CSV header corresponding to lines in the metrics
+echo "Commit,Version,Date,TS,JS,TS%,lib,test,Dependencies,window,Directives,Components"
+
+# Check out each tagged version and run metrics
+# Skip v6.x, it had lots of dependencies checked in
+for TAG in $(git tag | grep -v 'v6'); do
+    git checkout -q "$TAG"
+    DATE=$(git show --no-patch --format=%cs)
+    # Output as CSV rows
+    "$DIR"/fe-stats-get.sh -q | paste -sd , -
+done

scripts/stats-get.sh

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+#!/bin/bash
+
+# Add `-q` to skip labels
+while getopts "q" flag; do
+    case $flag in
+    q) OPT_QUIET=1 ;;
+    esac
+done
+
+function label() {
+    # Say label unless -q was given
+    [ -z $OPT_QUIET ] && echo -ne "$1:\t"
+    # Say value if present
+    [ -n "$2" ] && echo $2
+}
+
+WC_JS=$(find app -type f -name '*.js' | xargs wc -l --total=only)
+WC_TS=$(find app -type f -name '*.ts' | xargs wc -l --total=only)
+TS_RATIO=$(node -pe "Math.round($WC_TS / ($WC_TS + $WC_JS) * 100)")
+
+# TODO The git commands output control chars, and they bork the label strings
+label "Commit hash"
+git show --no-patch --format="%h"
+
+label "Tag"
+git tag --points-at HEAD | grep "^v"
+
+label "Date"
+git show --no-patch --format=%cs
+
+label "TypeScript lines of code" $WC_TS
+label "JavaScript lines of code" $WC_JS
+label "Ratio of TypeScript" $TS_RATIO%
+
+label "Size of repo (KB)"
+git ls-files | xargs du --apparent-size -c | tail -n1 | cut -f1
+
+label "Size of lib/ (KB)"
+du --apparent-size -s app/lib/ | cut -f1
+
+label "Test lines of code"
+find test/ -type f | xargs wc -l --total=only
+
+label "Direct dependencies"
+cat package.json | jq '.dependencies * .devDependencies | keys | length'
+
+label "Assignments to \`window\`"
+grep -roE 'window\.\w+ =' app/scripts/ | grep -v window.location | wc -l
+
+label "AngularJS directives"
+grep -r .directive\( app/scripts/ | wc -l
+
+label "AngularJS components"
+grep -r .component\( app/scripts/ | wc -l