---

#!/usr/bin/env bash

#####################
# Checks that every chart directory is named exactly like the `name:` field of
# its Chart.yaml, for the layout <root>/<chartDir>/Chart.yaml at any depth.
#
# The two must agree because helm names the packaged archive after the `name:`
# field, while the pipeline builds the path and the .tgz filename from the
# directory name - a mismatch only shows up as a missing file at `helm push`.
#
# Usage: ./validate-chart-names.sh [root ...]        (default root: .)
# Prints every mismatch and exits 1; exits 0 when everything agrees.
#####################

set -uo pipefail

roots=("$@")
[[ "${#roots[@]}" -gt 0 ]] || roots=(".")

# Top-level `name:` of a Chart.yaml. Only column-0 keys are considered, so the
# indented `- name:` entries under `dependencies:` are ignored. Strips CR (the
# charts are checked out with CRLF), inline comments and trailing blanks.
chart_name() {
  awk '
    /^name:/ {
      sub(/^name:[ \t]*/, "")
      sub(/\r$/, "")
      sub(/[ \t]+#.*$/, "")
      sub(/[ \t]+$/, "")
      print
      exit
    }
  ' "$1"
}

checked=0
bad=0

for root in "${roots[@]}"; do
  if [[ ! -d "$root" ]]; then
    echo "##[error] no such directory: $root" >&2
    bad=$((bad + 1))
    continue
  fi

  while IFS= read -r -d '' chartFile; do
    checked=$((checked + 1))

    dirName="$(basename "$(dirname "$chartFile")")"
    name="$(chart_name "$chartFile")"
    name="${name%\"}"; name="${name#\"}"
    name="${name%\'}"; name="${name#\'}"

    if [[ -z "$name" ]]; then
      echo "NO NAME   $chartFile"
      echo "          no top-level 'name:' field"
      bad=$((bad + 1))
    elif [[ "$name" != "$dirName" ]]; then
      echo "MISMATCH  $chartFile"
      echo "          directory: $dirName"
      echo "          name:      $name"
      bad=$((bad + 1))
    fi
  done < <(find "$root" -type f -name Chart.yaml -print0)
done

echo "checked $checked Chart.yaml file(s)"

if [[ "$bad" -ne 0 ]]; then
  echo "##[error] $bad chart(s) whose directory and name: disagree"
  exit 1
fi

echo "all chart directories match their name: field"