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dmc_corona_boot.lua
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dmc_corona_boot.lua
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--====================================================================--
-- dmc_library_boot.lua
--
-- utility to read in dmc_library configuration file
--
-- by David McCuskey
-- Documentation:
--====================================================================--
--[[
Copyright (C) 2013-2014 David McCuskey. All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in the
Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so, subject to the
following conditions:
The above copyright notice and this permission notice shall be included in all copies
or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
--]]
--====================================================================--
-- DMC Corona Library : DMC Corona Boot
--====================================================================--
-- Semantic Versioning Specification: http://semver.org/
local VERSION = "1.3.0"
--====================================================================--
-- Imports
local ok, json = pcall( require, 'json' )
if not ok then json = nil end
--====================================================================--
-- Setup Support
--====================================================================--
local Utils = {} -- make copying from dmc_utils easier
function Utils.extend( fromTable, toTable )
function _extend( fT, tT )
for k,v in pairs( fT ) do
if type( fT[ k ] ) == "table" and
type( tT[ k ] ) == "table" then
tT[ k ] = _extend( fT[ k ], tT[ k ] )
elseif type( fT[ k ] ) == "table" then
tT[ k ] = _extend( fT[ k ], {} )
else
tT[ k ] = v
end
end
return tT
end
return _extend( fromTable, toTable )
end
-- split string up in parts, using separator
-- returns array of pieces
function Utils.split( str, sep )
if sep == nil then
sep = "%s"
end
t={} ; i=1
for str in string.gmatch( str, "([^"..sep.."]+)") do
t[i] = str
i = i + 1
end
return t
end
local platform_name = system.getInfo( 'platformName' )
function Utils.getSystemSeparator()
if platform_name == 'Win' then
return '\\'
else
return '/'
end
end
function Utils.sysPathToRequirePath( sys_path )
-- print( "sysPathToRequirePath", sys_path)
local sys_tbl = Utils.split( sys_path, Utils.getSystemSeparator() )
-- clean off any dots
for i=#sys_tbl, 1, -1 do
if sys_tbl[i]=='.' then
table.remove( sys_tbl, i )
end
end
return table.concat( sys_tbl, '.' )
end
--== Start lua_files copies ==--
local File = {}
--====================================================================--
--== readFile() ==--
function File.readFile( file_path, options )
-- print( "File.readFile", file_path )
assert( type(file_path)=='string', "file path is not string" )
assert( #file_path>0 )
options = options or {}
options.lines = options.lines == nil and true or options.lines
--==--
local fh, contents
fh = assert( io.open(file_path, 'r') )
if options.lines == false then
-- read contents in one big string
contents = fh:read( '*all' )
else
-- read all contents of file into a table
contents = {}
for line in fh:lines() do
table.insert( contents, line )
end
end
io.close( fh )
return contents
end
function File.readFileLines( file_path, options )
options = options or {}
options.lines = true
return File.readFile( file_path, options )
end
function File.readFileContents( file_path, options )
options = options or {}
options.lines = false
return File.readFile( file_path, options )
end
--====================================================================--
--== read/write JSONFile() ==--
function File.convertLuaToJson( lua_data )
assert( type(lua_data)=='table' )
--==--
return json.encode( lua_data )
end
function File.convertJsonToLua( json_str )
assert( type(json_str)=='string' )
assert( #json_str > 0 )
--==--
local data = json.decode( json_str )
assert( data~=nil, "Error reading JSON file, probably malformed data" )
return data
end
--====================================================================--
--== readConfigFile() ==--
function File.getLineType( line )
-- print( "File.getLineType", #line, line )
assert( type(line)=='string' )
--==--
local is_section, is_key = false, false
if #line > 0 then
is_section = ( string.find( line, '%[%w', 1, false ) == 1 )
is_key = ( string.find( line, '%w', 1, false ) == 1 )
end
return is_section, is_key
end
function File.processSectionLine( line )
-- print( "File.processSectionLine", line )
assert( type(line)=='string' )
assert( #line > 0 )
--==--
local key = line:match( "%[([%w_]+)%]" )
return string.lower( key ) -- use only lowercase inside of module
end
function File.processKeyLine( line )
-- print( "File.processKeyLine", line )
assert( type(line)=='string' )
assert( #line > 0 )
--==--
-- split up line
local raw_key, raw_val = line:match( "([%w_:]+)%s*=%s*(.+)" )
-- split up key parts
local keys = {}
for k in string.gmatch( raw_key, "([^:]+)") do
table.insert( keys, #keys+1, k )
end
-- process key and value
local key_name, key_type = unpack( keys )
key_name = File.processKeyName( key_name )
key_type = File.processKeyType( key_type )
-- get final value
if not key_type or type(key_type)~='string' then
key_value = File.castTo_string( raw_val )
else
local method = 'castTo_'..key_type
if File[ method ] then
key_value = File[method]( raw_val )
end
end
return key_name, key_value
end
function File.processKeyName( name )
-- print( "File.processKeyName", name )
assert( type(name)=='string' )
assert( #name > 0 )
--==--
return string.lower( name ) -- use only lowercase inside of module
end
function File.processKeyType( name )
-- print( "File.processKeyType", name )
--==--
if type(name)=='string' then
name = string.lower( name ) -- use only lowercase inside of module
end
return name
end
function File.castTo_bool( value )
assert( value=='true' or value == 'false' )
--==--
if value == 'true' then return true
else return false end
end
function File.castTo_file( value )
return File.castTo_string( value )
end
function File.castTo_int( value )
assert( type(value)=='string' )
--==--
return tonumber( value )
end
function File.castTo_json( value )
assert( type(value)=='string' )
--==--
return File.convertJsonToLua( value )
end
function File.castTo_path( value )
assert( type(value)=='string' )
--==--
return string.gsub( value, '[/\\]', "." )
end
function File.castTo_string( value )
assert( type(value)~='nil' or type(value)~='table' )
return tostring( value )
end
function File.parseFileLines( lines, options )
-- print( "parseFileLines", #lines )
assert( options.default_section ~= nil )
--==--
local curr_section = options.default_section
local config_data = {}
config_data[ curr_section ]={}
for _, line in ipairs( lines ) do
local is_section, is_key = File.getLineType( line )
-- print( line, is_section, is_key )
if is_section then
curr_section = File.processSectionLine( line )
if not config_data[ curr_section ] then
config_data[ curr_section ]={}
end
elseif is_key then
local key, val = File.processKeyLine( line )
config_data[ curr_section ][key] = val
end
end
return config_data
end
-- @param file_path string full path to file
--
function File.readConfigFile( file_path, options )
-- print( "File.readConfigFile", file_path )
options = options or {}
options.default_section = options.default_section or File.DEFAULT_CONFIG_SECTION
--==--
return File.parseFileLines( File.readFileLines( file_path ), options )
end
--== End lua_files copies ==--
--====================================================================--
-- Setup DMC Corona Library Config
--====================================================================--
-- This is standard code to bootstrap the dmc-corona-library
-- it looks for a configuration file to read
local DMC_CORONA_CONFIG_FILE = 'dmc_corona.cfg'
local DMC_CORONA_DEFAULT_SECTION = 'dmc_corona'
local dmc_lib_data, dmc_lib_info
-- no module has yet tried to read in a config file
if _G.__dmc_corona == nil then
local file_path, config_data
file_path = system.pathForFile( DMC_CORONA_CONFIG_FILE, system.ResourceDirectory )
if file_path ~= nil then
config_data = File.readConfigFile( file_path, { default_section=DMC_CORONA_DEFAULT_SECTION } )
end
-- create/store config data
_G.__dmc_corona = config_data or {}
dmc_lib_data = _G.__dmc_corona
-- create/setup library default
dmc_lib_data.dmc_corona = dmc_lib_data.dmc_corona or {}
dmc_lib_info = dmc_lib_data.dmc_corona
end
-- fix the way that Corona loads files
-- the package.path/Lua Loaders don't obey
if _G.__dmc_require == nil then
-- setup structure
_G.__dmc_require = {
paths={},
require=_G.require -- original require method
}
_G.require = function( module_name )
-- print( "dmc_require: ", module_name )
assert( type(module_name)=='string', "dmc_require: expected string module name" )
--==--
local resource_path = system.pathForFile( system.ResourceDirectory ) or ""
local _paths = _G.__dmc_require.paths
local _require = _G.__dmc_require.require
local lua_paths = Utils.extend( _paths, {} )
table.insert( lua_paths, 1, '' ) -- add search at root-level
local err_tbl = {}
local library = nil
local idx = 1
repeat
local mod_path = lua_paths[idx]
local path = ( mod_path=='' and mod_path or mod_path..'.' ) .. module_name
local has_module, result = pcall( _require, path )
if has_module then
library = result
else
if string.find( result, '^error loading module' ) then
print( result )
error( result, 2 )
else
table.insert( err_tbl, resource_path..'/'..mod_path )
table.insert( err_tbl, result )
end
end
idx=idx+1
until library or idx > #lua_paths
if not library then
table.insert( err_tbl, 1, "module '".. module_name.."' not found in archive:" )
-- print( table.concat( err_tbl, '\n' ) )
error( table.concat( err_tbl, '\n' ), 2 )
end
return library
end
end
-- enhance lua search path
if dmc_lib_info.lua_path then
local dmc_paths = _G.__dmc_require.paths
local path_info = dmc_lib_info.lua_path
for i=#path_info, 1, -1 do
dmc_paths[i] = Utils.sysPathToRequirePath( path_info[i] )
end
end