#!/usr/bin/bash

set -euo pipefail

# Dependency: https://mikefarah.gitbook.io/yq/

# Clone from https://github.com/gohugoio/hugoDocs/ and checkout the tag of your
# hugo version
# Path to <hugoDocsDir>/content/en/
hugo_docs_path="$1"

cd "$hugo_docs_path"

add_tag() {
  local tagname fname
  tagname="$1"
  fname="$2"

  # Tags file format: https://vimhelp.org/tagsrch.txt.html#ctags
  printf "%s\t%s\t2\n" "$tagname" "$hugo_docs_path/$fname"
}

add_methods() {
  local f title

  for f in methods/*/*md; do
    if [ "$(basename "$f")" = _index.md ]; then
      continue
    fi

    title="$(yq --front-matter extract .title "$f")"
    add_tag "$title" "$f"

  done
}

add_funcs() {
  local f halias

  for f in functions/*/*md; do
    if [ "$(basename "$f")" = _index.md ]; then
      continue
    fi

    add_tag "$(basename "${f%.md}")" "$f"

    halias="$(yq --front-matter extract .params.functions_and_methods.aliases "$f" |
      grep -v -F -e null -e '[]' -e ',')" # Remove invalid/missing/multiple aliases

    if [ -n "$halias" ]; then
      halias="${halias:1:${#halias}-2}"
      add_tag "$halias" "$f"
    fi
  done
}

add_methods
add_funcs