58 lines
1.5 KiB
Perl
58 lines
1.5 KiB
Perl
Create ppx1, ppx2 and exe:
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- ppx1 is a regular ppx rewriter
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- ppx2 is also a ppx rewriter, preprocessed with ppx1
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- exe depends on ppx2
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$ mkdir -p project/ppx/ppx1 project/ppx/ppx2 project/exe
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$ cat > project/ppx/dune-project <<EOF
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> (lang dune 3.7)
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> (package (name the-ppx))
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> EOF
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$ cat > project/ppx/ppx1/dune <<EOF
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> (library
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> (name ppx1)
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> (public_name the-ppx.ppx1)
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> (kind ppx_rewriter)
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> (ppx.driver (main Ppx1.main)))
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> EOF
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$ cat > project/ppx/ppx1/ppx1.ml <<EOF
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> let main () =
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> let out = ref "" in
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> let args =
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> [ ("-o", Arg.Set_string out, "")
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> ; ("--impl", Arg.Set_string (ref ""), "")
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> ; ("--as-ppx", Arg.Set (ref false), "")
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> ; ("--cookie", Arg.Set (ref false), "")
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> ]
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> in
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> let anon _ = () in
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> Arg.parse (Arg.align args) anon "";
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> let out = open_out !out in
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> close_out out;
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> EOF
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$ cat > project/ppx/ppx2/dune <<EOF
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> (library
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> (name ppx2)
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> (public_name the-ppx.ppx2)
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> (preprocess (pps ppx1)) ; changing to the-ppx.ppx1 makes it work
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> (kind ppx_rewriter))
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> EOF
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$ cat > project/ppx/ppx2/ppx2.ml <<EOF
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> let main () = ()
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> EOF
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$ cat > project/dune-project <<EOF
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> (lang dune 3.7)
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> (package (name the-exe))
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> EOF
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$ cat > project/exe/dune <<EOF
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> (executable
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> (name the_exe)
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> (public_name the-exe)
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> (libraries the-ppx.ppx2))
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> EOF
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$ touch project/exe/the_exe.ml
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$ OCAMLPATH=$PWD/prefix/lib/:$OCAMLPATH dune build --root project ./exe/the_exe.exe
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Entering directory 'project'
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Leaving directory 'project'
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