feat: you have to install openfst manually

openfst.rb

@@ -0,0 +1,63 @@
+class Openfst < Formula
+  desc "Library for weighted finite-state transducers"
+  homepage "https://www.openfst.org/twiki/bin/view/FST/WebHome"
+  url "https://openfst.org/twiki/pub/FST/FstDownload/openfst-1.8.3.tar.gz"
+  sha256 "077714159d5cf3e38a80b6c6656d3ccc2c8b8b6c50bb41bb65c5fec10796bf53"
+  license "Apache-2.0"
+
+  livecheck do
+    url "https://www.openfst.org/twiki/bin/view/FST/FstDownload"
+    regex(/href=.*?openfst[._-]v?(\d+(?:\.\d+)+)\.t/i)
+  end
+
+  # bottle do
+  #   sha256 cellar: :any,                 arm64_sequoia:  "5d174e442429bca62cb5efef625032721a5c6987e18ade3078e88091df31d921"
+  #   sha256 cellar: :any,                 arm64_sonoma:   "3a0436dfb645f06b824d626e1b8e10c47b782b7134c6ac04d5f4ee4df106db22"
+  #   sha256 cellar: :any,                 arm64_ventura:  "76a0f9e9075766f227495fe513ce756167b62d3c6fd326399bbe259ba493b6ee"
+  #   sha256 cellar: :any,                 arm64_monterey: "45aa8f4f880ea7e84b9aa4463f892d25b41b00cfb684aeb81efa94088e18d4c2"
+  #   sha256 cellar: :any,                 sonoma:         "9cc3657fddcd253c2e69e870a90978776f0356fab021338dcaad3c4c2837c20e"
+  #   sha256 cellar: :any,                 ventura:        "918bf970528321b4b385c8e08f57d9a45b530428bac2b0e74a474e5434fa1f03"
+  #   sha256 cellar: :any,                 monterey:       "62b9fbfe4dd8e058825ae75a682f922844c4f3dae90d956e5e9e0192496d33ae"
+  #   sha256 cellar: :any_skip_relocation, x86_64_linux:   "18b293aa36b18f6c227da97b39f8389accdf0f02a6b5801b197d062a473407fa"
+  # end
+
+  fails_with gcc: "5" # for C++17
+
+  def install
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}",
+                          "--enable-fsts",
+                          "--enable-compress",
+                          "--enable-grm",
+                          "--enable-special"
+    system "make"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"text.fst").write <<~EOS
+      0 1 a x .5
+      0 1 b y 1.5
+      1 2 c z 2.5
+      2 3.5
+    EOS
+
+    (testpath/"isyms.txt").write <<~EOS
+      <eps> 0
+      a 1
+      b 2
+      c 3
+    EOS
+
+    (testpath/"osyms.txt").write <<~EOS
+      <eps> 0
+      x 1
+      y 2
+      z 3
+    EOS
+
+    system bin/"fstcompile", "--isymbols=isyms.txt", "--osymbols=osyms.txt", "text.fst", "binary.fst"
+    assert_predicate testpath/"binary.fst", :exist?
+  end
+end