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--
-- Embed the Lua scripts into src/host/scripts.c as static data buffers.
-- I embed the actual scripts, rather than Lua bytecodes, because the
-- bytecodes are not portable to different architectures, which causes
-- issues in Mac OS X Universal builds.
--
local function stripfile(fname)
local f = io.open(fname)
local s = assert(f:read("*a"))
f:close()
-- strip tabs
s = s:gsub("[\t]", "")
-- strip any CRs
s = s:gsub("[\r]", "")
-- strip out block comments
s = s:gsub("[^\"']%-%-%[%[.-%]%]", "")
s = s:gsub("[^\"']%-%-%[=%[.-%]=%]", "")
s = s:gsub("[^\"']%-%-%[==%[.-%]==%]", "")
-- strip out inline comments
s = s:gsub("\n%-%-[^\n]*", "\n")
-- escape backslashes
s = s:gsub("\\", "\\\\")
-- strip duplicate line feeds
s = s:gsub("\n+", "\n")
-- strip out leading comments
s = s:gsub("^%-%-[^\n]*\n", "")
-- escape line feeds
s = s:gsub("\n", "\\n")
-- escape double quote marks
s = s:gsub("\"", "\\\"")
return s
end
local function writeline(out, s, continues)
out:write("\t\"")
out:write(s)
out:write(iif(continues, "\"\n", "\",\n"))
end
local function writefile(out, fname, contents)
local max = 1024
out:write("\t/* " .. fname .. " */\n")
-- break up large strings to fit in Visual Studio's string length limit
local start = 1
local len = contents:len()
while start <= len do
local n = len - start
if n > max then n = max end
local finish = start + n
-- make sure I don't cut an escape sequence
while contents:sub(finish, finish) == "\\" do
finish = finish - 1
end
writeline(out, contents:sub(start, finish), finish < len)
start = finish + 1
end
out:write("\n")
end
function doembed()
-- load the manifest of script files
scripts = dofile("src/_manifest.lua")
-- main script always goes at the end
table.insert(scripts, "_premake_main.lua")
-- open scripts.c and write the file header
local out = io.open("src/host/scripts.c", "w+b")
out:write("/* Premake's Lua scripts, as static data buffers for release mode builds */\n")
out:write("/* DO NOT EDIT - this file is autogenerated - see BUILD.txt */\n")
out:write("/* To regenerate this file, run: premake4 embed */ \n\n")
out:write("const char* builtin_scripts[] = {\n")
for i,fn in ipairs(scripts) do
print(fn)
local s = stripfile("src/" .. fn)
writefile(out, fn, s)
end
out:write("\t0\n};\n");
out:close()
end
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