lmod 7.7.18 (new formula)

Closes #24305.

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

Formula/lmod.rb

@@ -0,0 +1,55 @@
+class Lmod < Formula
+  desc "Lua-based environment modules system to modify PATH variable"
+  homepage "https://www.tacc.utexas.edu/research-development/tacc-projects/lmod"
+  url "https://github.com/TACC/Lmod/archive/7.7.18.tar.gz"
+  sha256 "fe8905938d741fff02b7596b28fef26c311ffb807d27bdc1d83b185cc4d25fd7"
+
+  depends_on "lua"
+
+  resource "luafilesystem" do
+    url "https://github.com/keplerproject/luafilesystem/archive/v1_7_0_2.tar.gz"
+    sha256 "23b4883aeb4fb90b2d0f338659f33a631f9df7a7e67c54115775a77d4ac3cc59"
+  end
+
+  resource "luaposix" do
+    url "https://github.com/luaposix/luaposix/archive/v34.0.4.tar.gz"
+    sha256 "eb6e7322da3013bdb3d524f68df4f5510a2efd805c06bf7cc27be6611eab7483"
+  end
+
+  def install
+    luapath = libexec/"vendor"
+    ENV["LUA_PATH"] = "?.lua;" \
+                      "#{luapath}/share/lua/5.3/?.lua;" \
+                      "#{luapath}/share/lua/5.3/?/init.lua"
+    ENV["LUA_CPATH"] = "#{luapath}/lib/lua/5.3/?.so"
+
+    resources.each do |r|
+      r.stage do
+        system "luarocks", "make", "--tree=#{luapath}"
+      end
+    end
+
+    system "./configure", "--prefix=#{libexec}"
+    system "make", "install"
+    prefix.install_symlink "libexec/lmod/lmod" => "lmod"
+  end
+
+  def caveats
+    <<~EOS
+      To use LMod, you should add the init script to the shell you are using.
+
+      For example, the bash setup script is here: #{opt_prefix}/lmod/init/profile
+      and you can source it in your bash setup or link to it.
+
+      If you use fish, use #{opt_prefix}/lmod/init/fish, such as:
+        ln -s #{opt_prefix}/lmod/init/fish ~/.config/fish/conf.d/00_lmod.fish
+    EOS
+  end
+
+  test do
+    system "#{prefix}/lmod/init/sh"
+    output = shell_output("#{prefix}/lmod/libexec/spider #{prefix}/lmod/modulefiles/Core/")
+    assert_match "lmod", output
+    assert_match "settarg", output
+  end
+end