Excerpts from david.teller's message of Tue Sep 30 09:27:11 +0200 2008: > Hi everyone, > I'm trying to write a OCamlBuild plug-in to automatically generate > the .mli corresponding to a .mlpack (for documentation purposes). > > I've written a [rule] which lets me depend a .mli on the > corresponding .mlpack . From this .mlpack, I can obtain the list of > modules involved in the construction of the pack. Now, I only have to > 1. find the corresponding source .mli files > 2. find the corresponding .mli.depends files > 3. do a topological sort and create the destination .mli . > > Part 3 is no problem. On the other hand, I haven't been able to progress > much with parts 1 and 2. > > Part 2 requires waiting until the corresponding .mli.depends have been > created, but > * neither [~insert:`bottom] nor [~insert:(`after foo)] seem to help here > * attempting to [build] an ad-hoc list of files somehow extracted from > the mlpack only gives me dependency errors > * attempting [Solve.solve_target] doesn't seem to help any further.
If you need (depend) on files that you statically know then the ~deps argument
is fine (~deps:["%.mli.depends"; "%.mli"]). If you need files that you only
know dynamically then the 'build' argument function is for that purpose.
> As for part 1, it requires the ability to find which source .ml / .mli
> correspond to a given module. I can only assume OCamlBuild offers some
> kind of API for this purpose, because I'd rather avoid folding through
> the whole tree, resolving [include] directives myself to find a .ml or
> a .mli which may be the right file.
Yes the function is called expand_module it takes 3 arguments, the include
directories, the module name, the extensions.
Example: let include_dirs = Pathname.include_dirs_of (Pathname.dirname
mlpack)
in build (expand_module include_dirs module_name ["mli";
"mli.depends"])
Have a look to the ocamlbuild/ocaml_tools.ml file for a similar function
(import_mlypack).
--
Nicolas Pouillard aka Ertai
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