Kubernetes dependency stats

k8s-stats.sh

#!/usr/bin/env bash

# Graph at:
# https://docs.google.com/spreadsheets/d/1gtfXBuvBbS5OGHDX78Ax7I9ZKwNbn9l895Y6QlhhJGc/edit
#
# Results at:
# https://gist.github.com/liggitt/c85167509c56481c46c7bf602616041f

go install github.com/hhatto/gocloc/cmd/gocloc@latest
go install github.com/kubernetes-sigs/depstat@latest

output=$1
if [[ -z "${output}" ]]; then
  echo "Usage: k8s-stats.sh <outputfile>" >&2
  exit 1
fi

echo "Tag,Vendor files,Vendor LOC,Direct Deps,Transitive Deps,Total Deps" > ${output}

for i in $( seq 0 32 ); do
  tag=$(git tag --sort=v:refname | grep -E "v1[.]$i[.][0-9]+$" | tail -n 1)
  echo
  echo $tag
  
  git clean -dff > /dev/null
  git reset --hard HEAD > /dev/null
  git checkout -q $tag
  git clean -dff > /dev/null
  git reset --hard HEAD > /dev/null
  
  loc_output=$(
    cd vendor > /dev/null 2>&1 || cd Godeps > /dev/null 2>&1
    gocloc --include-lang=Go --output-type=json . | jq -r '"\(.total.files),\(.total.code)"'
  )

  dep_output=",,"
  if [ -f go.mod ]; then
    staging_dirs=$(ls staging/src/k8s.io | awk '{printf ",k8s.io/" $0}')
    dep_output=$(depstat stats -m "k8s.io/kubernetes${staging_dirs}" --json | jq -r '"\(.directDependencies),\(.transitiveDependencies),\(.totalDependencies)"')
  fi

  echo "${tag},${loc_output},${dep_output}"
  echo "${tag},${loc_output},${dep_output}" >> ${output}
done

stats.csv