#!/usr/bin/env ruby

require "net/https"

require "open3"

require "json"

require "digest/md5"

SLACK_WEBHOOK_URLS = [

File.read(File.expand_path("~git/config/slack-webhook-alerts")).chomp,

File.read(File.expand_path("~git/config/slack-webhook-commits")).chomp,

File.read(File.expand_path("~git/config/slack-webhook-ruby-jp")).chomp,

]

GRAVATAR_OVERRIDES = {

"nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e" => "https://avatars0.githubusercontent.com/u/21976",

"noreply@github.com" => "https://avatars1.githubusercontent.com/u/9919",

"nurse@users.noreply.github.com" => "https://avatars1.githubusercontent.com/u/13423",

"svn-admin@ruby-lang.org" => "https://avatars1.githubusercontent.com/u/29403229",

"svn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e" => "https://avatars1.githubusercontent.com/u/29403229",

"usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e" => "https://avatars2.githubusercontent.com/u/17790",

"usa@ruby-lang.org" => "https://avatars2.githubusercontent.com/u/17790",

"yui-knk@ruby-lang.org" => "https://avatars0.githubusercontent.com/u/5356517",

"znz@users.noreply.github.com" => "https://avatars3.githubusercontent.com/u/11857",

}

def escape(s)

s.gsub(/[&<>]/, "&" => "&amp;", "<" => "&lt;", ">" => "&gt;")

end

ARGV.each_slice(3) do |oldrev, newrev, refname|

out, = Open3.capture2("git", "rev-parse", "--symbolic", "--abbrev-ref", refname)

branch = out.strip

out, = Open3.capture2("git", "log", "--pretty=format:%H\n%h\n%cn\n%ce\n%ct\n%B", "--abbrev=10", "-z", "#{oldrev}..#{newrev}")

attachments = []

out.split("\0").reverse_each do |s|

sha, sha_abbr, committer, committeremail, committertime, body = s.split("\n", 6)

subject, body = body.split("\n", 2)

# Append notes content to `body` if it's notes

if refname.match(%r[\Arefs/notes/\w+\z])

# `--diff-filter=AM -M` to exclude rename by git's directory optimization

object = IO.popen(["git", "diff", "--diff-filter=AM", "-M", "--name-only", "#{sha}^..#{sha}"], &:read).chomp

if md = object.match(/\A(?<prefix>\h{2})\/?(?<rest>\h{38})\z/)

body = [body, IO.popen(["git", "notes", "show", md[:prefix] + md[:rest]], &:read)].join

end

end

gravatar = GRAVATAR_OVERRIDES.fetch(committeremail) do

"https://www.gravatar.com/avatar/#{ Digest::MD5.hexdigest(committeremail.downcase) }"

end

attachments << {

title: "#{ sha_abbr } (#{ branch }): #{ escape(subject) }",

title_link: "https://github.com/ruby/ruby/commit/#{ sha }",

text: escape((body || "").strip),

footer: committer,

footer_icon: gravatar,

ts: committertime.to_i,

color: '#24282D',

}

end

# 100 attachments cannot be exceeded. 20 is recommended. https://api.slack.com/docs/message-attachments

attachments.each_slice(20).each do |attachments_group|

payload = { attachments: attachments_group }

#Net::HTTP.post(

# URI.parse(SLACK_WEBHOOK_URL),

# JSON.generate(payload),

# "Content-Type" => "application/json"

#)

responses = SLACK_WEBHOOK_URLS.map do |url|

uri = URI.parse(url)

http = Net::HTTP.new(uri.host, uri.port)

http.use_ssl = true

http.start do

req = Net::HTTP::Post.new(uri.path)

req.set_form_data(payload: payload.to_json)

http.request(req)

end

end

results = responses.map { |resp| "#{resp.code} (#{resp.body})" }.join(', ')

puts "#{results} -- #{payload.to_json}"

end

end