Bug 2927604: Unable to build Premake with Visual Studio

1 files changed, 46 insertions, 19 deletions

diff --git a/scripts/embed.lua b/scripts/embed.lua
index d84ca33..ddb5ba4 100644
--- a/scripts/embed.lua
+++ b/scripts/embed.lua
@@ -5,7 +5,7 @@
 -- issues in Mac OS X Universal builds.
 --
 
-	local function embedfile(out, fname)
+	local function stripfile(fname)
 		local f = io.open(fname)
 		local s = f:read("*a")
 		f:close()
@@ -34,29 +34,56 @@
 		-- escape double quote marks
 		s = s:gsub("\"", "\\\"")
 		
+		return s
+	end
+
+
+	local function writeline(out, s)
 		out:write("\t\"")
 		out:write(s)
 		out:write("\",\n")
 	end
+	
+	
+	local function writefile(out, fname, contents)
+		-- cut smaller than max, so I don't wind up with tiny strings at end of files
+		local cut = 8192
+		local max = 9216
+
+		-- 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 = cut end
+			writeline(out, contents:sub(start, start + n))
+			start = start + n + 1
+		end		
+
+		writeline(out, "EOF:" .. fname)
+	end
 
 
 	function doembed()
-			-- load the manifest of script files
-			scripts = dofile("src/_manifest.lua")
-			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)
-				s = embedfile(out, "src/"..fn)
-			end
-			
-			out:write("\t0\n};\n");		
-			out:close()
+		-- 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