lua build scripts

[chaz/yoink] / build / compile.lua

diff --git a/build/compile.lua b/build/compile.lua
new file mode 100755 (executable)
index 0000000..31b20fd
--- /dev/null
+++ b/build/compile.lua
@@ -0,0 +1,62 @@
+#!/usr/bin/env lua
+
+--
+-- Yoink
+-- This script wraps around the compiler command to handle the creation of
+-- dependency files.  It works with new versions of GCC.
+--
+
+
+-- Get the next argument passed to the script.
+function shift()
+       var = arg[1]
+       table.remove(arg, 1)
+       arguments = string.format("%s %q", tostring(arguments), tostring(var))
+       return var
+end
+
+
+-- The compiler command is the first argument.
+compiler       = shift()
+arguments      = ""
+
+
+-- Consume each compiler argument, appending it to the arguments variable.
+while 0 < #arg do
+       local v = shift(arg)
+       if v == "-o" then product = shift(arg) end
+end
+if not product then print("No output file specified.") os.exit(1) end
+
+
+-- Now try the actual compile WITH dependency generation.
+if os.execute(compiler.." -MD"..arguments) ~= 0 then
+       -- Try it without dependency generation.
+       if os.execute(compiler..arguments) ~= 0 then
+               print("The compile failed.  :-(")
+               os.exit(1)
+       end
+       print("The compile succeeded without dependency generation.")
+       os.exit(0)
+end
+
+
+-- Remove the old dependency file.
+dep = product..".d"
+os.remove(dep)
+
+
+-- GCC outputs file.d for a product named file.o.
+gccdep = product:gsub("^.*/(.*)%.o$", "%1.d")
+tmpname = gccdep..".tmp"
+
+-- Fix up the dependency file with correct paths.
+if os.execute("test -f "..gccdep) == 0 and os.rename(gccdep, tmpname) then
+       os.execute(string.format("sed -e 's|.*:|%s %s:|' <%s >>%s", product, dep, tmpname, dep))
+       os.execute(string.format("sed -e 's/^.*://' -e 's/^ *//' -e 's/ *\\\\$//' -e 's/$/:/' <%s >>%s", tmpname, dep))
+       os.remove(tmpname)
+else
+       print("Couldn't find the dependency file at "..gccdep..".")
+       os.exit(1)
+end
+