gistfile1.txt

#!/usr/bin/env lua

local arg = { ... }

local function read_file(filename)
   local result = {}
   local chunk, err
   if setfenv then -- Lua 5.1
      chunk, err = loadfile(filename)
      if chunk then
         setfenv(chunk, result)
         ran, err = pcall(chunk)
      end
   else -- Lua 5.2
      chunk, err = loadfile(filename, "t", result)
      if chunk then
         ran, err = pcall(chunk)
      end
   end
   return result
end

local rs = read_file(arg[1])

local vars = {
   PREFIX = "where you want to install "..rs.package,
   LIBDIR = "where you want to install "..rs.package.."'s C modules",
   LUADIR = "where you want to install "..rs.package.."'s Lua modules",
   LUA = "your Lua interpreter",
   LUA_INCDIR = "where your Lua headers live",
   LUA_LIBDIR = "where your Lua libraries live",
}

local function explain_variables(cmd)
   print("where")
   for var, expl in pairs(vars) do
      if cmd:match("%$%("..var.."%)") then
         print("   * $("..var..") is "..expl)
      end
   end
end

print("Announcing "..rs.package.." version "..rs.version:gsub("-[0-9]+$","").." - "..rs.description.summary)
print()
print(rs.description.detailed)
print()
if rs.dependencies and next(rs.dependencies) then
   print(rs.package.." depends on the following Lua packages:")
   for _, dep in ipairs(rs.dependencies) do
      print("* "..dep)
   end
   print()
end
if rs.description.homepage then
   print("More information at the website: ")
   print(rs.description.homepage)
   print()
end
print("The license of "..rs.package.." is "..rs.description.license..".")
print()
if rs.source.url:match("^http") then
   print("You can download the sources at the following URL:")
   print(rs.source.url)
   if rs.source.md5 then
      print("MD5: "..rs.source.md5)
   end
   print()
end
print(rs.package.." can be installed using LuaRocks:")
print()
print("   luarocks install "..rs.package:lower())
print()
if rs.build.type == "command" then
   print("Alternatively, you can build and install it using the following commands:")
   print()
   print("To build:")
   print("   "..rs.build.build_command)
   explain_variables(rs.build.build_command)
   print()
   print("To install:")
   print("   "..rs.build.install_command)
   explain_variables(rs.build.install_command)
   print()
elseif rs.build.type == "make" then
   print("Alternatively, you can build and install it using make:")
   print()
   print("To build:")
   print("   make "..table.concat(rs.build.build_variables or {}, " "))
   print()
   print("To install:")
   print("   make "..(rs.build.install_target or "install")..table.concat(rs.build.install_variables or {}, " "))
   print()
elseif rs.build.type == "builtin" then
   print("Alternatively, you can install by hand the following modules")
   print("to their proper places:")
   print()
   for mod, data in pairs(rs.build.modules) do
      if type(data) == "string" then
         print("* install "..data.." as the module `"..mod.."`")
      elseif type(data) == "table" then
         if type(data.sources) == "string" then
            print("* install "..data.sources.." as the module `"..mod.."`")
         elseif type(data.sources) == "table" then
            print("* compile "..table.concat(data.sources, ", ").." to the module `"..mod.."`")
         end
      end
   end
elseif rs.build.type == "none" then
   print("Alternatively, you can install by hand the following files")
   print("to their proper places:")
   print()
   if rs.build.install.lua then
      for name, file in pairs(rs.build.install.lua) do
         print("* install "..file.." as the module `"..name.."`")
      end
   end
   if rs.build.install.bin then
      for name, file in pairs(rs.build.install.bin) do
         print("* install "..file.." as the script `"..name.."`")
      end
   end
   print()
end
if rs.build.copy_directories and next(rs.build.copy_directories) then
   print("Also, copy the following directories from the source package")
   print("to the appropriate places in your system:")
   for _, dir in ipairs(rs.build.copy_directories) do
      print("   "..dir)
   end
end
print()