1 files changed, 133 insertions, 0 deletions

diff --git a/src/luarocks/command_line.lua b/src/luarocks/command_line.lua
new file mode 100644
index 00000000..b3020284
--- /dev/null
+++ b/src/luarocks/command_line.lua
@@ -0,0 +1,133 @@
+
+program_version = "1.0"
+
+--- Functions for command-line scripts.
+module("luarocks.command_line", package.seeall)
+
+local util = require("luarocks.util")
+local cfg = require("luarocks.cfg")
+local fs = require("luarocks.fs")
+
+--- Display an error message and exit.
+-- @param message string: The error message.
+local function die(message)
+   assert(type(message) == "string")
+
+   local ok, err = pcall(util.run_scheduled_functions)
+   if not ok then
+      print("\nLuaRocks "..program_version.." internal bug (please report at luarocks-developers@lists.luaforge.net):\n"..err)
+   end
+   print("\nError: "..message)
+   os.exit(1)
+end
+
+--- Main command-line processor.
+-- Parses input arguments and calls the appropriate driver function
+-- to execute the action requested on the command-line, forwarding
+-- to it any additional arguments passed by the user.
+-- Uses the global table "commands", which contains
+-- the loaded modules representing commands.
+-- @param ... string: Arguments given on the command-line.
+function run_command(...)
+   local args = {...}
+   local cmdline_vars = {}
+   for i = #args, 1, -1 do
+      local arg = args[i]
+      if arg:match("^[^-][^=]*=") then
+         local var, val = arg:match("^([A-Z_][A-Z0-9_]*)=(.*)")
+         if val then
+            cmdline_vars[var] = val
+            table.remove(args, i)
+         else
+            die("Invalid assignment: "..arg)
+         end
+      end
+   end
+   local nonflags = { util.parse_flags(unpack(args)) }
+   local flags = table.remove(nonflags, 1)
+   
+   if flags["to"] then
+      if flags["to"] == true then
+         die("Argument error: use --to=<path>")
+      end
+      local root_dir = fs.absolute_name(flags["to"])
+      cfg.root_dir = root_dir
+      cfg.rocks_dir = root_dir.."/rocks"
+      cfg.scripts_dir = root_dir.."/bin"
+   else
+      local trees = cfg.rocks_trees
+      for i = #trees, 1, -1 do
+         local tree = trees[i]
+         if fs.make_dir(tree) and fs.is_writable(tree) then
+            cfg.root_dir = tree
+            cfg.rocks_dir = tree.."/rocks"
+            cfg.scripts_dir = rawget(cfg, "scripts_dir") or tree.."/bin"
+            break
+         end
+      end
+   end
+
+   cfg.root_dir = cfg.root_dir:gsub("/+$", "")
+   cfg.rocks_dir = cfg.rocks_dir:gsub("/+$", "")
+   cfg.scripts_dir = cfg.scripts_dir:gsub("/+$", "")
+   
+   cfg.variables.ROCKS_TREE = cfg.root_dir
+   cfg.variables.SCRIPTS_DIR = cfg.scripts_dir
+
+   if flags["from"] then
+      if flags["from"] == true then
+         die("Argument error: use --from=<url>")
+      end
+      local protocol, path = fs.split_url(flags["from"])
+      table.insert(cfg.rocks_servers, 1, protocol.."://"..path)
+   end
+   
+   if flags["only-from"] then
+      if flags["only-from"] == true then
+         die("Argument error: use --only-from=<url>")
+      end
+      cfg.rocks_servers = { flags["only-from"] }
+   end
+   
+   local command
+   
+   if flags["version"] then
+      print(program_name.." "..program_version)
+      print(program_description)
+      print()
+      os.exit(0)
+   elseif flags["help"] or #nonflags == 0 then
+      command = "help"
+      args = nonflags
+   else
+      command = nonflags[1]
+      for i, arg in ipairs(args) do
+         if arg == command then
+            table.remove(args, i)
+            break
+         end
+      end
+   end
+   
+   if command ~= "help" then
+      for k, v in pairs(cmdline_vars) do
+         cfg.variables[k] = v
+      end
+   end
+   
+   command = command:gsub("-", "_")
+   if commands[command] then
+      local xp, ok, err = xpcall(function() return commands[command].run(unpack(args)) end, function(err)
+         die(debug.traceback("LuaRocks "..program_version
+            .." bug (please report at luarocks-developers@lists.luaforge.net).\n"
+            ..err, 2))
+      end)
+      if xp and (not ok) then
+         die(err)
+      end
+   else
+      die("Unknown command: "..command)
+   end
+   
+   util.run_scheduled_functions()
+end