i2pd 2.21.0 (new formula)

Closes #31772.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/i2pd.rb

@@ -0,0 +1,71 @@
+class I2pd < Formula
+  desc "Full-featured C++ implementation of I2P client"
+  homepage "https://i2pd.website/"
+  url "https://github.com/PurpleI2P/i2pd/archive/2.21.0.tar.gz"
+  sha256 "96c15cf7b51feacd5bb3f7032c7d961961325102574a1a4d6cb8dd794e906e5b"
+
+  depends_on "boost"
+  depends_on "miniupnpc"
+  depends_on "openssl@1.1"
+
+  needs :cxx11
+
+  def install
+    system "make", "install", "DEBUG=no", "HOMEBREW=1", "USE_UPNP=yes", "USE_AENSI=no", "USE_AVX=no", "PREFIX=#{prefix}"
+
+    # preinstall to prevent overwriting changed by user configs
+    confdir = etc/"i2pd"
+    rm_rf prefix/"etc"
+    confdir.install doc/"i2pd.conf", doc/"subscriptions.txt", doc/"tunnels.conf"
+  end
+
+  def post_install
+    # i2pd uses datadir from variable below. If that path not exists, create that directory and create symlinks to certificates and configs.
+    # Certificates can be updated between releases, so we must re-create symlinks to latest version of it on upgrade.
+    datadir = var/"lib/i2pd"
+    if datadir.exist?
+      rm datadir/"certificates"
+      datadir.install_symlink pkgshare/"certificates"
+    else
+      datadir.dirname.mkpath
+      datadir.install_symlink pkgshare/"certificates", etc/"i2pd/i2pd.conf", etc/"i2pd/subscriptions.txt", etc/"i2pd/tunnels.conf"
+    end
+
+    (var/"log/i2pd").mkpath
+  end
+
+  plist_options :manual => "i2pd"
+
+  def plist; <<~EOS
+    <?xml version="1.0" encoding="UTF-8"?>
+    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+    <plist version="1.0">
+    <dict>
+      <key>Label</key>
+      <string>#{plist_name}</string>
+      <key>RunAtLoad</key>
+      <true/>
+      <key>ProgramArguments</key>
+      <array>
+        <string>#{opt_bin}/i2pd</string>
+        <string>--datadir=#{var}/lib/i2pd</string>
+        <string>--conf=#{etc}/i2pd/i2pd.conf</string>
+        <string>--tunconf=#{etc}/i2pd/tunnels.conf</string>
+        <string>--log=file</string>
+        <string>--logfile=#{var}/log/i2pd/i2pd.log</string>
+        <string>--pidfile=#{var}/run/i2pd.pid</string>
+      </array>
+    </dict>
+    </plist>
+  EOS
+  end
+
+  test do
+    pid = fork do
+      exec "#{bin}/i2pd", "--datadir=#{testpath}", "--daemon"
+    end
+    sleep 5
+    Process.kill "TERM", pid
+    assert_predicate testpath/"router.keys", :exist?, "Failed to start i2pd"
+  end
+end