saldl 31 (new formula)

Closes Homebrew/legacy-homebrew#45850.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/saldl.rb

@@ -0,0 +1,38 @@
+class Saldl < Formula
+  desc "CLI downloader optimized for speed and early preview."
+  homepage "https://saldl.github.io"
+  url "https://github.com/saldl/saldl/archive/v31.tar.gz"
+  sha256 "146a980ae2109a391c7a8ab6a1c525458db9bf18f3f0477731c9b876630078b4"
+  head "https://github.com/saldl/saldl.git", :shallow => false
+
+  depends_on "pkg-config" => :build
+  depends_on "asciidoc" => :build
+  depends_on "docbook-xsl" => :build
+  depends_on "libevent"
+
+  if MacOS.version <= :mavericks
+    # curl >= 7.42 is required
+    depends_on "curl"
+  else
+    depends_on "curl" => :optional
+  end
+
+  def install
+    # a2x/asciidoc needs this to build the man page successfully
+    ENV["XML_CATALOG_FILES"] = "#{etc}/xml/catalog"
+
+    args = ["--prefix=#{prefix}"]
+
+    # head uses git describe to acquire a version
+    args << "--saldl-version=v#{version}" unless build.head?
+
+    system "./waf", "configure", *args
+    system "./waf", "build"
+    system "./waf", "install"
+  end
+
+  test do
+    system "#{bin}/saldl", "http://brew.sh/index.html"
+    assert File.exist? "index.html"
+  end
+end