Language parser installations

[noah-de]

First of all, I would like to thank you for providing this excellent open source tool. I have found the Docker quickstart to be quite compelling.
I installed with opam install cca which provides the diffast command but not the language modules.

$ diffast samples/c/0/airo.c samples/c/1/airo.c 
[diffast][WARNING][file search] module not found: "Mcpp.cmxs"
[diffast][WARNING][file search] conf file not found: "ccx.conf.xml"
[diffast][WARNING][Astml] conf for parser "ccx" not found
[diffast][WARNING][file search] module not found: "Mcpp.cmxs"
[diffast][WARNING][file search] module not found: "Mcpp.cmxs"
[diffast][WARNING][file search] module not found: "Mcpp.cmxs"
[diffast][ERROR] "/home/user/.cca/cache/af/af42b4557cbcda1c4b4ffcbbfaf17544/src.ast": no such file or directory

The parser was built with make from within the ./src/ directory.
The problem appears that the cmx files are not found.
Those files are in the source code (/src/ast/analyzing/langs/) but the make process is not finding them.

....
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_dtd, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_tree_parser, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_types, and its interface was not compiled with -opaque
ocamlfind ocamlopt -package pxp,volt -syntax camlp4o -I ../../../../util -I ../../../../ast/analyzing/common -I ../../../../otreediff -I ../../../../ast/analyzing/engine -O3 -g -c label.ml
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_event, and its interface was not compiled with -opaque
ocamlfind ocamlopt -package pxp,volt -syntax camlp4o -I ../../../../util -I ../../../../ast/analyzing/common -I ../../../../otreediff -I ../../../../ast/analyzing/engine -O3 -g -c tree.ml
ocamlfind ocamlopt -package pxp,volt -syntax camlp4o -I ../../../../util -I ../../../../ast/analyzing/common -I ../../../../otreediff -I ../../../../ast/analyzing/engine -O3 -g -c fact.ml
ocamlfind ocamlopt -package pxp,volt -syntax camlp4o -I ../../../../util -I ../../../../ast/analyzing/common -I ../../../../otreediff -I ../../../../ast/analyzing/engine -O3 -g -c lib_base.ml
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_dtd, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_ev_parser, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_event, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_tree_parser, and its interface was not compiled with -opaque
File "_none_", line 1:
Warning 58 [no-cmx-file]: no cmx file was found in path for module Pxp_types, and its interface was not compiled with -opaque
....

Can you please help me to understand (and overcome) this problem? I have tried serveral Debian based operating systems and OCaml versions (>= 4.14.1), as indicated in the other issue (#42).
I would be glad to contribute to this project, and write accessible documentation once I have a better grasp of how things work.
Thank you!

[codinuum]

Thank you for reporting. We will look into it.

[codinuum]

It is likely caused by recent changes of mirage packaging.
We have pushed an urgent workaround b42334f .

[noah-de]

Thank you!
Unfortunately, the issue persists even after checking out the latest changes from the develop branch.

$ make distclean
$ git checkout develop
$ git log
$ make
$ diffast samples/java/0/Test.java samples/java/1/Test.java
[diffast][WARNING][file search] module not found: "Mjava.cmxs"
[diffast][ERROR] parser for ".java" not found

Is there a way that I can just copy the file from ./src/ast/analyzing/langs/java/Mjava.cmxs to the correct location?
Thank you!

[codinuum]

Where is your diffast? It searches relative path ../../modules for lang modules.

$ $(dirname $(dirname $(which diffast)))/modules/

Or the following may work.

$ ./src/ast/analyzing/bin/diffast samples/java/0/Test.java samples/java/1/Test.java