155 lines
4.2 KiB
Lua
155 lines
4.2 KiB
Lua
--
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-- Embed the Lua scripts into src/host/scripts.c as static data buffers.
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-- I embed the actual scripts, rather than Lua bytecodes, because the
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-- bytecodes are not portable to different architectures, which causes
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-- issues in Mac OS X Universal builds.
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--
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local raw_sum = 0
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local trim_sum = 0
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local function loadScript(fname)
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dofile("scripts/luasrcdiet/LuaSrcDiet.lua")
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-- Let LuaSrcDiet do its job
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fname = path.getabsolute(fname)
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local s,l = get_slim_luasrc(fname)
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-- Now do some cleanup so we can write these out as C strings
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-- strip any CRs
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s = s:gsub("[\r]", "")
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-- escape backslashes
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s = s:gsub("\\", "\\\\")
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-- escape line feeds
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s = s:gsub("\n", "\\n")
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-- escape double quote marks
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s = s:gsub("\"", "\\\"")
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-- overall counters
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raw_sum = raw_sum + l:len()
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trim_sum = trim_sum + s:len()
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return s
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end
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local function appendScript(result, contents)
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-- break up large strings to fit in Visual Studio's string length limit
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local max = 4096
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local start = 1
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local len = contents:len()
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while start <= len do
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local n = len - start
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if n > max then n = max end
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local finish = start + n
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-- make sure I don't cut an escape sequence
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while contents:sub(finish, finish) == "\\" do
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finish = finish - 1
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end
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local s = contents:sub(start, finish)
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table.insert(result, "\t\"" .. s .. iif(finish < len, '"', '",'))
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start = finish + 1
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end
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table.insert(result, "")
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end
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-- Prepare the file header
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local result = {}
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table.insert(result, "/* Premake's Lua scripts, as static data buffers for release mode builds */")
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table.insert(result, "/* DO NOT EDIT - this file is autogenerated - see BUILD.txt */")
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table.insert(result, "/* To regenerate this file, run: premake5 embed */")
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table.insert(result, "")
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table.insert(result, '#include "premake.h"')
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table.insert(result, "")
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-- Find all of the _manifest.lua files within the project
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local mask = path.join(_MAIN_SCRIPT_DIR, "**/_manifest.lua")
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local manifests = os.matchfiles(mask)
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-- Generate an index of the script file names. Script names are stored
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-- relative to the directory containing the manifest, i.e. the main
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-- Xcode script, which is at $/modules/xcode/xcode.lua is stored as
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-- "xcode/xcode.lua".
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table.insert(result, "const char* builtin_scripts_index[] = {")
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for mi = 1, #manifests do
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local manifestName = manifests[mi]
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local manifestDir = path.getdirectory(manifestName)
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local baseDir = path.getdirectory(manifestDir)
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local files = dofile(manifests[mi])
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for fi = 1, #files do
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local filename = path.join(manifestDir, files[fi])
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filename = path.getrelative(baseDir, filename)
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table.insert(result, '\t"' .. filename .. '",')
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end
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end
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table.insert(result, '\t"src/_premake_main.lua",')
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table.insert(result, '\t"src/_manifest.lua",')
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table.insert(result, '\t"src/_modules.lua",')
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table.insert(result, "\tNULL")
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table.insert(result, "};")
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table.insert(result, "")
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-- Embed the actual script contents
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table.insert(result, "const char* builtin_scripts[] = {")
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for mi = 1, #manifests do
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local manifestName = manifests[mi]
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local manifestDir = path.getdirectory(manifestName)
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local files = dofile(manifests[mi])
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for fi = 1, #files do
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local filename = path.join(manifestDir, files[fi])
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local scr = loadScript(filename)
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appendScript(result, scr)
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end
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end
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appendScript(result, loadScript(path.join(_SCRIPT_DIR, "../src/_premake_main.lua")))
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appendScript(result, loadScript(path.join(_SCRIPT_DIR, "../src/_manifest.lua")))
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appendScript(result, loadScript(path.join(_SCRIPT_DIR, "../src/_modules.lua")))
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table.insert(result, "\tNULL")
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table.insert(result, "};")
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table.insert(result, "")
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-- Write it all out. Check against the current contents of scripts.c first,
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-- and only overwrite it if there are actual changes.
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result = table.concat(result, "\n")
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local scriptsFile = path.getabsolute(path.join(_SCRIPT_DIR, "../src/host/scripts.c"))
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local oldVersion
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local file = io.open(scriptsFile, "r")
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if file then
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oldVersion = file:read("*a")
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file:close()
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end
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if oldVersion ~= result then
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printf("Writing scripts.c (compressed %2.1f%%)", (trim_sum / raw_sum) * 100)
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file = io.open(scriptsFile, "w+b")
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file:write(result)
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file:close()
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end
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