Capture the compilation options used by Flash Builder

mxmlc and compc have a -dump-config option to dump all settings to a file. Later, the settings in that file can be read back in with -load-config.

So, do this:

– In Flash Builder, do Project Properties
– Click the “Flex Compiler” tab
– In the “Additional compiler arguments” box, add “-dump-config full-path-to-output-file”. For example, on Windows, “-dump-config C:myconfig.xml”; on Mac, “-dump-config /Users/myname/myconfig.xml”. (If you use a relative path, the file will be put in some odd hard-to-find place.)
– Click OK. If Build Automatically is on, just clicking OK will cause the file to be built; if it is off, do a build now.
– Now that the settings have been dumped, go back to your project settings and remove the -dump-config option.
– Tweak the settings file as necessary (one thing you will almost certainly want to do is change true to false if your nightly build is supposed to do a release build), and use it in your nightly build script.

Please be aware that this only captures compiler settings; it doesn’t capture all the other little things that Flex Builder does for you, like compiling Flex library projects that your project depends on, copying non-embedded assets to the output directory, optimizing modules for the application, extracting RSLs, copying the HTML template, and so on.

From Mike Morearty’s blog: