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--
-- _premake_main.lua
-- Script-side entry point for the main program logic.
-- Copyright (c) 2002-2011 Jason Perkins and the Premake project
--
local scriptfile = "premake4.lua"
local shorthelp = "Type 'premake4 --help' for help"
local versionhelp = "premake4 (Premake Build Script Generator) %s"
_WORKING_DIR = os.getcwd()
--
-- Inject a new target platform into each solution; called if the --platform
-- argument was specified on the command line.
--
local function injectplatform(platform)
if not platform then return true end
platform = premake.checkvalue(platform, premake.fields.platforms.allowed)
for sln in premake.solution.each() do
local platforms = sln.platforms or { }
-- an empty table is equivalent to a native build
if #platforms == 0 then
table.insert(platforms, "Native")
end
-- the solution must provide a native build in order to support this feature
if not table.contains(platforms, "Native") then
return false, sln.name .. " does not target native platform\nNative platform settings are required for the --platform feature."
end
-- add it to the end of the list, if it isn't in there already
if not table.contains(platforms, platform) then
table.insert(platforms, platform)
end
sln.platforms = platforms
end
return true
end
--
-- Script-side program entry point.
--
function _premake_main(scriptpath)
-- if running off the disk (in debug mode), load everything
-- listed in _manifest.lua; the list divisions make sure
-- everything gets initialized in the proper order.
if (scriptpath) then
local scripts = dofile(scriptpath .. "/_manifest.lua")
for _,v in ipairs(scripts) do
dofile(scriptpath .. "/" .. v)
end
end
-- Now that the scripts are loaded, I can use path.getabsolute() to properly
-- canonicalize the executable path.
_PREMAKE_COMMAND = path.getabsolute(_PREMAKE_COMMAND)
-- Set up the environment for the chosen action early, so side-effects
-- can be picked up by the scripts.
premake.action.set(_ACTION)
-- Seed the random number generator so actions don't have to do it themselves
math.randomseed(os.time())
-- If there is a project script available, run it to get the
-- project information, available options and actions, etc.
local fname = _OPTIONS["file"] or scriptfile
if (os.isfile(fname)) then
dofile(fname)
end
-- Process special options
if (_OPTIONS["version"]) then
printf(versionhelp, _PREMAKE_VERSION)
return 1
end
if (_OPTIONS["help"]) then
premake.showhelp()
return 1
end
-- If no action was specified, show a short help message
if (not _ACTION) then
print(shorthelp)
return 1
end
-- If there wasn't a project script I've got to bail now
if (not os.isfile(fname)) then
error("No Premake script ("..scriptfile..") found!", 2)
end
-- Validate the command-line arguments. This has to happen after the
-- script has run to allow for project-specific options
action = premake.action.current()
if (not action) then
error("Error: no such action '" .. _ACTION .. "'", 0)
end
ok, err = premake.option.validate(_OPTIONS)
if (not ok) then error("Error: " .. err, 0) end
-- Sanity check the current project setup
ok, err = premake.checktools()
if (not ok) then error("Error: " .. err, 0) end
-- If a platform was specified on the command line, inject it now
ok, err = injectplatform(_OPTIONS["platform"])
if (not ok) then error("Error: " .. err, 0) end
-- work-in-progress: build the configurations
print("Building configurations...")
premake.bake.buildconfigs()
ok, err = premake.checkprojects()
if (not ok) then error("Error: " .. err, 0) end
-- Hand over control to the action
printf("Running action '%s'...", action.trigger)
premake.action.call(action.trigger)
print("Done.")
return 0
end
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