Homebrew 配方(Formula)核心部分:
1. url
& sha256
-
用途: 指定软件包的下载地址和校验和,用于确保下载文件的完整性。
-
示例 :
url "https://example.com/download/tool-1.0.0.tar.gz" sha256 "3bcbdbb9a50cc6ff38f5d3214b6bfa929c7e35b8966f1c994b601d70b5cf9a9f"
2. depends_on
-
用途: 指定软件包的依赖项,包括 Homebrew 其他配方或系统库。确保在安装前已经安装这些依赖项。
-
示例 :
depends_on "openssl"
3. install
-
用途: 这是配方的核心部分,定义了如何编译和安装软件包。通常包括配置、编译和安装命令。
-
示例 :
def install system "./configure", "--prefix=#{prefix}" system "make", "install" end
4. test
-
用途 : 定义安装后用于验证软件包是否正常工作的测试代码。这个部分在用户运行
brew test
时执行,确保软件包功能正常。 -
示例 :
test do assert_match "Tool version 1.0.0", shell_output("#{bin}/tool --version") end
以macos安装openssl 为例子:
这个类定义了 Homebrew 用来安装 OpenSSL 3.3.1 的配方
class OpensslAT3 < Formula
desc "Cryptography and SSL/TLS Toolkit" # 描述这个工具包的用途
homepage "https://openssl-library.org" # OpenSSL 的主页
url "https://github.com/openssl/openssl/releases/download/openssl-3.3.1/openssl-3.3.1.tar.gz" # OpenSSL 3.3.1 的下载地址
mirror "http://fresh-center.net/linux/misc/openssl-3.3.1.tar.gz" # 备用下载地址
sha256 "777cd596284c883375a2a7a11bf5d2786fc5413255efab20c50d6ffe6d020b7e" # 文件的校验值,用于验证下载是否正确
license "Apache-2.0" # OpenSSL 使用的许可证
# 这部分用于检查 OpenSSL 是否有新的版本
livecheck do
url "https://openssl-library.org/source/"
regex(/href=.*?openssl[._-]v?(3(?:\.\d+)+)\.t/i)
end
# 下面定义了 Homebrew 如何为不同的操作系统构建和安装 OpenSSL
bottle do
rebuild 1
sha256 arm64_sonoma: "f0dc71fe6bb0ce1618acd7c4a68dcaf5d725bd2beb2b703c1992e8ba91b5c7c7"
sha256 arm64_ventura: "b39924b6b665832c7dcb46e99a5e257ca3e932313c528086631769933c78d9a0"
sha256 arm64_monterey: "4cde73aab115e6c814c8a98488c742a622f26ee8d7b2cfb422b69eccbde8148f"
sha256 sonoma: "5bf5e00bd262cb450490fad19b167cb684dfe8ba9c4f3dfa079871f437cac84a"
sha256 ventura: "c3148aa9a81e9cd5e05f6171a9febdbe2de43a9ce1d9b8dc58bf041ce112c7fc"
sha256 monterey: "f18b36971ea359ccc7d69b5b4a7ab22ccf363c45a51417d984301700c1c73fdf"
sha256 x86_64_linux: "63d76975c55730b4f46dd00ed325de913e8319b7fa6dae1e03eb11cc86514c7a"
end
# 依赖项部分:定义了 OpenSSL 需要的依赖包
depends_on "ca-certificates" # 需要的证书管理工具
# 如果在 Linux 上,则需要 Perl 的几个模块
on_linux do
resource "Test::Harness" do
url "https://cpan.metacpan.org/authors/id/L/LE/LEONT/Test-Harness-3.48.tar.gz"
mirror "http://cpan.metacpan.org/authors/id/L/LE/LEONT/Test-Harness-3.48.tar.gz"
sha256 "e73ff89c81c1a53f6baeef6816841b89d3384403ad97422a7da9d1eeb20ef9c5"
end
resource "Test::More" do
url "https://cpan.metacpan.org/authors/id/E/EX/EXODIST/Test-Simple-1.302198.tar.gz"
mirror "http://cpan.metacpan.org/authors/id/E/EX/EXODIST/Test-Simple-1.302198.tar.gz"
sha256 "1dc07bcffd23e49983433c948de3e3f377e6e849ad7fe3432c717fa782024faa"
end
resource "ExtUtils::MakeMaker" do
url "https://cpan.metacpan.org/authors/id/B/BI/BINGOS/ExtUtils-MakeMaker-7.70.tar.gz"
mirror "http://cpan.metacpan.org/authors/id/B/BI/BINGOS/ExtUtils-MakeMaker-7.70.tar.gz"
sha256 "f108bd46420d2f00d242825f865b0f68851084924924f92261d684c49e3e7a74"
end
end
# 这些命令将处理安装时的符号链接
link_overwrite "bin/c_rehash", "bin/openssl", "include/openssl/*"
link_overwrite "lib/libcrypto*", "lib/libssl*"
link_overwrite "lib/pkgconfig/libcrypto.pc", "lib/pkgconfig/libssl.pc", "lib/pkgconfig/openssl.pc"
link_overwrite "share/doc/openssl/*", "share/man/man*/*ssl"
# 这个方法定义了 Homebrew 运行 `./config` 时使用的参数
def configure_args
args = %W[
--prefix=#{prefix}
--openssldir=#{openssldir}
--libdir=lib
no-ssl3
no-ssl3-method
no-zlib
]
on_linux do
args += (ENV.cflags || "").split
args += (ENV.cppflags || "").split
args += (ENV.ldflags || "").split
end
args
end
# 这部分是在 macOS 和 Linux 上指定的额外配置参数
def install
if OS.linux?
ENV.prepend_create_path "PERL5LIB", buildpath/"lib/perl5"
ENV.prepend_path "PATH", buildpath/"bin"
%w[ExtUtils::MakeMaker Test::Harness Test::More].each do |r|
resource(r).stage do
system "perl", "Makefile.PL", "INSTALL_BASE=#{buildpath}"
system "make", "PERL5LIB=#{ENV["PERL5LIB"]}", "CC=#{ENV.cc}"
system "make", "install"
end
end
end
# 在配置和编译之前,删除干扰 OpenSSL 构建的环境变量
ENV.delete("OPENSSL_LOCAL_CONFIG_DIR")
# 设置 Perl 的路径,确保 OpenSSL 构建脚本不会因为 Perl 的路径变化而中断
ENV["PERL"] = Formula["perl"].opt_bin/"perl" if which("perl") == Formula["perl"].opt_bin/"perl"
# 指定架构相关的编译选项
arch_args = []
if OS.mac?
arch_args += %W[darwin64-#{Hardware::CPU.arch}-cc enable-ec_nistp_64_gcc_128]
elsif Hardware::CPU.intel?
arch_args << (Hardware::CPU.is_64_bit? ? "linux-x86_64" : "linux-elf")
elsif Hardware::CPU.arm?
arch_args << (Hardware::CPU.is_64_bit? ? "linux-aarch64" : "linux-armv4")
end
# 创建安装目录并运行配置脚本
openssldir.mkpath
system "perl", "./Configure", *(configure_args + arch_args)
# 编译并安装
system "make"
system "make", "install", "MANDIR=#{man}", "MANSUFFIX=ssl"
# 运行测试
system "make", "test", "TESTS=-test_afalg"
# 防止 `brew` 删除 `certs` 和 `private` 目录
touch %w[certs private].map { |subdir| openssldir/subdir/".keepme" }
end
# 定义 OpenSSL 的配置目录
def openssldir
etc/"openssl@3"
end
# 安装完成后的额外步骤
def post_install
rm(openssldir/"cert.pem") if (openssldir/"cert.pem").exist?
openssldir.install_symlink Formula["ca-certificates"].pkgetc/"cert.pem"
end
# 安装后输出的注意事项
def caveats
<<~EOS
A CA file has been bootstrapped using certificates from the system
keychain. To add additional certificates, place .pem files in
#{openssldir}/certs
and run
#{opt_bin}/c_rehash
EOS
end
# 测试部分:验证 OpenSSL 是否正确安装和工作
test do
# 确保必要的配置文件存在
assert_predicate pkgetc/"openssl.cnf", :exist?,
"OpenSSL requires the .cnf file for some functionality"
# 检查 OpenSSL 本身是否按预期工作
(testpath/"testfile.txt").write("This is a test file")
expected_checksum = "e2d0fe1585a63ec6009c8016ff8dda8b17719a637405a4e23c0ff81339148249"
system bin/"openssl", "dgst", "-sha256", "-out", "checksum.txt", "testfile.txt"
open("checksum.txt") do |f|
checksum = f.read(100).split("=").last.strip
assert_equal checksum, expected_checksum
end
end
end
1. 配置文件下载和解压
通过配方文件的开头部分,我们知道需要下载 OpenSSL 源代码并解压:
url "https://github.com/openssl/openssl/releases/download/openssl-3.3.1/openssl-3.3.1.tar.gz"
对应的手动步骤:
curl -O https://www.openssl.org/source/openssl-3.3.1.tar.gz
tar xzfv openssl-3.3.1.tar.gz
cd openssl-3.3.1
2. 配置编译选项
配方中的 configure_args
部分和 arch_args
部分提供了编译时的配置选项:
def configure_args
args = %W[
--prefix=#{prefix}
--openssldir=#{openssldir}
--libdir=lib
no-ssl3
no-ssl3-method
no-zlib
]
end
if OS.mac?
arch_args += %W[darwin64-#{Hardware::CPU.arch}-cc enable-ec_nistp_64_gcc_128]
对应的手动步骤:
./config \
--prefix=/usr/local/Cellar/openssl@3/3.3.1 \
--openssldir=/usr/local/openssl@3 \
--libdir=lib \
no-ssl3 \
no-ssl3-method \
no-zlib \
darwin64-x86_64-cc \
enable-ec_nistp_64_gcc_128
3. 编译和安装
从 install
方法中可以看到实际的编译和安装过程:
system "make"
system "make", "install", "MANDIR=#{man}", "MANSUFFIX=ssl"
对应的手动步骤:
make
make install MANDIR=/usr/local/Cellar/openssl@3/3.3.1/share/man MANSUFFIX=ssl
4. 测试和清理
虽然通常手动安装不需要执行所有测试,但如果你想确保安装无误,可以参考配方中的测试步骤:
system "make", "test", "TESTS=-test_afalg"
对应的手动步骤:
make test