Added updated guile-hall file

Formula/guile-hall.rb

@@ -0,0 +1,45 @@
+class GuileHall < Formula
+  desc "Hall is a project manager for Guile modules and applications"
+  homepage "https://gitlab.com/a-sassmannshausen/guile-hall/"
+  url "https://gitlab.com/api/v4/projects/7016408/repository/archive?sha=cc0c9016220de42084f9b61f7353edeb62dbff82"
+  sha256 "997331e60cd009be93fd7d6d3dacaa4eec87499cd6345ee14602ae323318ae62"
+
+  depends_on "autoconf" => :build
+  depends_on "automake" => :build
+  depends_on "pkg-config" => :build
+  depends_on "texinfo" => :build
+  depends_on "guile"
+  depends_on "guile-lib"
+  depends_on "guile-config"
+
+  def install
+    ENV["GUILE_AUTO_COMPILE"] = "0"
+
+    # We need this so we can find other modules.
+    ENV["GUILE_LOAD_PATH"] = HOMEBREW_PREFIX/"share/guile/site/3.0"
+    ENV["GUILE_LOAD_COMPILED_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/site-ccache"
+    ENV["GUILE_SYSTEM_EXTENSIONS_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/extensions"
+
+    system "autoreconf", "-vif"
+    system "./configure", "--prefix=#{prefix}"
+    system "make", "install"
+  end
+
+  def caveats
+    <<~EOS
+      Remember to add the following to your .bashrc or equivalent in order to use this module:
+        export GUILE_LOAD_PATH="#{HOMEBREW_PREFIX}/share/guile/site/3.0"
+        export GUILE_LOAD_COMPILED_PATH="#{HOMEBREW_PREFIX}/lib/guile/3.0/site-ccache"
+        export GUILE_SYSTEM_EXTENSIONS_PATH="#{HOMEBREW_PREFIX}/lib/guile/3.0/extensions"
+    EOS
+  end
+
+  test do
+    ENV["GUILE_AUTO_COMPILE"] = "0"
+    ENV["GUILE_LOAD_PATH"] = HOMEBREW_PREFIX/"share/guile/site/3.0"
+    ENV["GUILE_LOAD_COMPILED_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/site-ccache"
+    ENV["GUILE_SYSTEM_EXTENSIONS_PATH"] = HOMEBREW_PREFIX/"lib/guile/3.0/extensions"
+
+    system "#{bin}/hall"
+  end
+end