minamijoyo/hoge.rb

## hoge.rb
require "formula"
require_relative "lib/private_strategy"

class Hoge < Formula
  homepage "https://github.com/yourcompany/hoge"
  url "https://github.com/yourcompany/hoge/releases/download/v0.1.0/hoge_v0.1.0_darwin_amd64.tar.gz", :using => GitHubPrivateRepositoryReleaseDownloadStrategy
  sha256 "6de411ff3e4b1658a413dd6181fcXXXXXXXXXXXXXXXXXXXX"
  head "https://github.com/yourcompany/hoge.git"
  version "0.1.0"

  def install
    bin.install "hoge"
  end
end

## install.sh
brew tap yourcompany/tap git@github.com:yourcompany/homebrew-tap.git
export HOMEBREW_GITHUB_API_TOKEN=xxx
brew install hoge

## private_strategy.rb
# Save this file as `lib/private_strategy.rb`
# Add `require_relative "lib/private_strategy"` to your formula.
#
# This is based on the following, with minor fixes.
# https://github.com/Homebrew/brew/blob/193af1442f6b9a19fa71325160d0ee2889a1b6c9/Library/Homebrew/compat/download_strategy.rb#L48-L157

# BSD 2-Clause License
#
# Copyright (c) 2009-present, Homebrew contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# GitHubPrivateRepositoryDownloadStrategy downloads contents from GitHub
# Private Repository. To use it, add
# `:using => GitHubPrivateRepositoryDownloadStrategy` to the URL section of
# your formula. This download strategy uses GitHub access tokens (in the
# environment variables `HOMEBREW_GITHUB_API_TOKEN`) to sign the request.  This
# strategy is suitable for corporate use just like S3DownloadStrategy, because
# it lets you use a private GitHub repository for internal distribution.  It
# works with public one, but in that case simply use CurlDownloadStrategy.
class GitHubPrivateRepositoryDownloadStrategy < CurlDownloadStrategy
  require "utils/formatter"
  require "utils/github"

  def initialize(url, name, version, **meta)
    super
    parse_url_pattern
    set_github_token
  end

  def parse_url_pattern
    unless match = url.match(%r{https://github.com/([^/]+)/([^/]+)/(\S+)})
      raise CurlDownloadStrategyError, "Invalid url pattern for GitHub Repository."
    end

    _, @owner, @repo, @filepath = *match
  end

  def download_url
    "https://#{@github_token}@github.com/#{@owner}/#{@repo}/#{@filepath}"
  end

  private

  def _fetch(url:, resolved_url:)
    curl_download download_url, to: temporary_path
  end

  def set_github_token
    @github_token = ENV["HOMEBREW_GITHUB_API_TOKEN"]
    unless @github_token
      raise CurlDownloadStrategyError, "Environmental variable HOMEBREW_GITHUB_API_TOKEN is required."
    end

    validate_github_repository_access!
  end

  def validate_github_repository_access!
    # Test access to the repository
    GitHub.repository(@owner, @repo)
  rescue GitHub::HTTPNotFoundError
    # We only handle HTTPNotFoundError here,
    # becase AuthenticationFailedError is handled within util/github.
    message = <<~EOS
      HOMEBREW_GITHUB_API_TOKEN can not access the repository: #{@owner}/#{@repo}
      This token may not have permission to access the repository or the url of formula may be incorrect.
    EOS
    raise CurlDownloadStrategyError, message
  end
end

# GitHubPrivateRepositoryReleaseDownloadStrategy downloads tarballs from GitHub
# Release assets. To use it, add
# `:using => GitHubPrivateRepositoryReleaseDownloadStrategy` to the URL section of
# your formula. This download strategy uses GitHub access tokens (in the
# environment variables HOMEBREW_GITHUB_API_TOKEN) to sign the request.
class GitHubPrivateRepositoryReleaseDownloadStrategy < GitHubPrivateRepositoryDownloadStrategy
  def initialize(url, name, version, **meta)
    super
  end

  def parse_url_pattern
    url_pattern = %r{https://github.com/([^/]+)/([^/]+)/releases/download/([^/]+)/(\S+)}
    unless @url =~ url_pattern
      raise CurlDownloadStrategyError, "Invalid url pattern for GitHub Release."
    end

    _, @owner, @repo, @tag, @filename = *@url.match(url_pattern)
  end

  def download_url
    "https://#{@github_token}@api.github.com/repos/#{@owner}/#{@repo}/releases/assets/#{asset_id}"
  end

  private

  def _fetch(url:, resolved_url:)
    # HTTP request header `Accept: application/octet-stream` is required.
    # Without this, the GitHub API will respond with metadata, not binary.
    curl_download download_url, "--header", "Accept: application/octet-stream", to: temporary_path
  end

  def asset_id
    @asset_id ||= resolve_asset_id
  end

  def resolve_asset_id
    release_metadata = fetch_release_metadata
    assets = release_metadata["assets"].select { |a| a["name"] == @filename }
    raise CurlDownloadStrategyError, "Asset file not found." if assets.empty?

    assets.first["id"]
  end

  def fetch_release_metadata
    release_url = "https://api.github.com/repos/#{@owner}/#{@repo}/releases/tags/#{@tag}"
    GitHub.open_api(release_url)
  end
end
	require "formula"
	require_relative "lib/private_strategy"

	class Hoge < Formula
	homepage "https://github.com/yourcompany/hoge"
	url "https://github.com/yourcompany/hoge/releases/download/v0.1.0/hoge_v0.1.0_darwin_amd64.tar.gz", :using => GitHubPrivateRepositoryReleaseDownloadStrategy
	sha256 "6de411ff3e4b1658a413dd6181fcXXXXXXXXXXXXXXXXXXXX"
	head "https://github.com/yourcompany/hoge.git"
	version "0.1.0"

	def install
	bin.install "hoge"
	end
	end
	brew tap yourcompany/tap git@github.com:yourcompany/homebrew-tap.git
	export HOMEBREW_GITHUB_API_TOKEN=xxx
	brew install hoge
	# Save this file as `lib/private_strategy.rb`
	# Add `require_relative "lib/private_strategy"` to your formula.
	#
	# This is based on the following, with minor fixes.
	# https://github.com/Homebrew/brew/blob/193af1442f6b9a19fa71325160d0ee2889a1b6c9/Library/Homebrew/compat/download_strategy.rb#L48-L157

	# BSD 2-Clause License
	#
	# Copyright (c) 2009-present, Homebrew contributors
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#
	# * Redistributions of source code must retain the above copyright notice, this
	# list of conditions and the following disclaimer.
	#
	# * Redistributions in binary form must reproduce the above copyright notice,
	# this list of conditions and the following disclaimer in the documentation
	# and/or other materials provided with the distribution.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	# GitHubPrivateRepositoryDownloadStrategy downloads contents from GitHub
	# Private Repository. To use it, add
	# `:using => GitHubPrivateRepositoryDownloadStrategy` to the URL section of
	# your formula. This download strategy uses GitHub access tokens (in the
	# environment variables `HOMEBREW_GITHUB_API_TOKEN`) to sign the request. This
	# strategy is suitable for corporate use just like S3DownloadStrategy, because
	# it lets you use a private GitHub repository for internal distribution. It
	# works with public one, but in that case simply use CurlDownloadStrategy.
	class GitHubPrivateRepositoryDownloadStrategy < CurlDownloadStrategy
	require "utils/formatter"
	require "utils/github"

	def initialize(url, name, version, **meta)
	super
	parse_url_pattern
	set_github_token
	end

	def parse_url_pattern
	unless match = url.match(%r{https://github.com/([^/]+)/([^/]+)/(\S+)})
	raise CurlDownloadStrategyError, "Invalid url pattern for GitHub Repository."
	end

	_, @owner, @repo, @filepath = *match
	end

	def download_url
	"https://#{@github_token}@github.com/#{@owner}/#{@repo}/#{@filepath}"
	end

	private

	def _fetch(url:, resolved_url:)
	curl_download download_url, to: temporary_path
	end

	def set_github_token
	@github_token = ENV["HOMEBREW_GITHUB_API_TOKEN"]
	unless @github_token
	raise CurlDownloadStrategyError, "Environmental variable HOMEBREW_GITHUB_API_TOKEN is required."
	end

	validate_github_repository_access!
	end

	def validate_github_repository_access!
	# Test access to the repository
	GitHub.repository(@owner, @repo)
	rescue GitHub::HTTPNotFoundError
	# We only handle HTTPNotFoundError here,
	# becase AuthenticationFailedError is handled within util/github.
	message = <<~EOS
	HOMEBREW_GITHUB_API_TOKEN can not access the repository: #{@owner}/#{@repo}
	This token may not have permission to access the repository or the url of formula may be incorrect.
	EOS
	raise CurlDownloadStrategyError, message
	end
	end

	# GitHubPrivateRepositoryReleaseDownloadStrategy downloads tarballs from GitHub
	# Release assets. To use it, add
	# `:using => GitHubPrivateRepositoryReleaseDownloadStrategy` to the URL section of
	# your formula. This download strategy uses GitHub access tokens (in the
	# environment variables HOMEBREW_GITHUB_API_TOKEN) to sign the request.
	class GitHubPrivateRepositoryReleaseDownloadStrategy < GitHubPrivateRepositoryDownloadStrategy
	def initialize(url, name, version, **meta)
	super
	end

	def parse_url_pattern
	url_pattern = %r{https://github.com/([^/]+)/([^/]+)/releases/download/([^/]+)/(\S+)}
	unless @url =~ url_pattern
	raise CurlDownloadStrategyError, "Invalid url pattern for GitHub Release."
	end

	_, @owner, @repo, @tag, @filename = *@url.match(url_pattern)
	end

	def download_url
	"https://#{@github_token}@api.github.com/repos/#{@owner}/#{@repo}/releases/assets/#{asset_id}"
	end

	private

	def _fetch(url:, resolved_url:)
	# HTTP request header `Accept: application/octet-stream` is required.
	# Without this, the GitHub API will respond with metadata, not binary.
	curl_download download_url, "--header", "Accept: application/octet-stream", to: temporary_path
	end

	def asset_id
	@asset_id \|\|= resolve_asset_id
	end

	def resolve_asset_id
	release_metadata = fetch_release_metadata
	assets = release_metadata["assets"].select { \|a\| a["name"] == @filename }
	raise CurlDownloadStrategyError, "Asset file not found." if assets.empty?

	assets.first["id"]
	end

	def fetch_release_metadata
	release_url = "https://api.github.com/repos/#{@owner}/#{@repo}/releases/tags/#{@tag}"
	GitHub.open_api(release_url)
	end
	end