get_contributors.sh

#!/usr/bin/env bash

# Get a list of all contributors that contributed in some way
# either by directly opening a PR, or by participating in issues.
#
# This script is a helper to fill out the "Contributors" chapter.
# It'll only spit out the names and an user must add them to the book.
#
# This script takes two arguments:
#   - `username`: Your github username used to authenticate the GitHub API
#   - `token`: A github Personal Access Token used to authenticate the GitHub API

set -euo pipefail

# Check if there are `username` and `token` arguments
if [ $# -eq 0 ]
then
  user="$(git config github.user)"
  token="$(git config github.oauth-token)"
elif [ $# -eq 2 ]
then
  user="$1"
  token="$2"
else
  user=""
  token=""
fi

if [ "$user" == "" -o "$token" == "" ]
then
  echo "github token required. The token is normally loaded from"
  echo "git config (github.user, github.oauth-token), but you can"
  echo "also use as follows:"
  echo ""
  echo "Usage: $0 <username> <token>"
  exit 1
fi

# Check if a command is available, otherwise exit.
function check_bin() {
  if ! command -v $1 &> /dev/null
  then
    echo "'$1' is not installed, but required to run this script."
    exit 1
  fi
}

check_bin curl
check_bin jq

function get_issue_numbers() {
  local result="$(curl -s -u $user:$token -H "Accept: application/vnd.github.v3+json" \
    "https://api.github.com/repos/rust-lang/wg-async/issues?state=all&labels=$1&per_page=100" \
    | jq '.[].number')"

  if [ "$(echo $result | wc -w)" -ge 100 ];
  then
    echo "Found 100 results for $1. Due to GitHub's paging limits, there might be some issues that are missing"
  fi
  echo $result
}

# Get a list of users that participated in issues.
function issue_contributors() {
  local numbers="$(get_issue_numbers status-quo-story-ideas) $(get_issue_numbers shiny-future)"
  local numbers="$(echo $numbers | sort | uniq)"

  for num in $numbers; do
    curl -s -u $user:$token -H "Accept: application/vnd.github.v3+json" \
      https://api.github.com/repos/rust-lang/wg-async/issues/$num/comments | jq -r \
      '.[] | "[" + .user.login + "](" + .user.html_url + ")"'
  done | sort | uniq
}

# Get a list of direct code contributors
function code_contributors() {
  curl -s -u $user:$token -H "Accept: application/vnd.github.v3+json" \
    "https://api.github.com/repos/rust-lang/wg-async/contributors?per_page=100" | jq -r \
    '.[] | "[" + .login + "](" + .html_url + ")"' | sort | uniq
}

echo "Issue contributors"
issue_contributors

echo

echo "Code contributors"
code_contributors