distributedcomponents / verdi-runtime Goto Github PK

I've been following https://github.com/uwplse/verdi#Building instructions but command

 opam install verdi-runtime 

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
[ERROR] The compilation of verdi-runtime failed at
        "/Users/user/.opam/opam-init/hooks/sandbox.sh build ocaml pkg/pkg.ml build
        --pinned false".

#=== ERROR while compiling verdi-runtime.dev ==================================#
# context     2.0.3 | macos/x86_64 | ocaml-base-compiler.4.07.1 | http://opam-dev.distributedcomponents.net
# path        ~/.opam/default/.opam-switch/build/verdi-runtime.dev
# command     ~/.opam/opam-init/hooks/sandbox.sh build ocaml pkg/pkg.ml build --pinned false
# exit-code   1
# env-file    ~/.opam/log/verdi-runtime-13459-a71bb4.env
# output-file ~/.opam/log/verdi-runtime-13459-a71bb4.out
### output ###
# [...]
# ocamlfind ocamlopt -c -g -bin-annot -safe-string -package cheerios-runtime -package yojson -package ppx_deriving_yojson -package base64 -I src -o src/DebugShim.cmx src/DebugShim.ml
# + ocamlfind ocamlopt -c -g -bin-annot -safe-string -package cheerios-runtime -package yojson -package ppx_deriving_yojson -package base64 -I src -o src/DebugShim.cmx src/DebugShim.ml
# File "src/DebugShim.ml", line 100, characters 28-38:
# Error: Unbound module B64
# Command exited with code 2.
# pkg.ml: [ERROR] cmd ['ocamlbuild' '-use-ocamlfind' '-classic-display' '-j' '4' '-tag' 'debug'
#      '-build-dir' '_build' 'opam' 'pkg/META' 'CHANGES.md' 'LICENSE.md'
#      'README.md' 'src/Util.cmi' 'src/Opts.cmi' 'src/Daemon.cmi'
#      'src/Shim.cmi' 'src/DisklessShim.cmi' 'src/OrderedShim.cmi'
#      'src/UnorderedShim.cmi' 'src/DynamicShim.cmi' 'src/DiskOpShim.cmi'
#      'src/DebugShim.cmi' 'src/verdi_runtime.a' 'src/verdi_runtime.cma'
#      'src/verdi_runtime.cmxa' 'src/verdi_runtime.cmxs']: exited with 10



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><>  🐫
┌─ The following actions failed
│ λ build verdi-runtime dev
└─
╶─ No changes have been performe

is there any quick fix I can apply?

Current approaches to sending of TCP data in shims make one attempt to send everything at once, and gives up if that fails. A more reasonable approach is to keep trying to send until all is sent or a real error occurs.

More on this technique: https://beej.us/guide/bgnet/output/html/singlepage/bgnet.html#sendall

Everything should work even when string and bytes are considered different.

recv doesn't always return with the amount of data required; in this case, a shim should save incomplete data in a buffer and attempt to fill up the buffer when the socket becomes readable again.

More on this issue:

• https://beej.us/guide/bgnet/output/html/singlepage/bgnet.html#sonofdataencap
• https://stackoverflow.com/questions/4336612/handling-multiple-recv-calls-and-all-possible-scenarios

Version 2.3.0 and below of base64 are compatible, while versions above 3.0.0 are not. Probably some cross-compatible solution can be found.

OCaml allows setting sockets as non-blocking. Do this where reasonable, and handle the additional exceptions.

More on non-blocking sockets:

• https://stackoverflow.com/questions/39613902/ocaml-non-blocking-client-socket
• http://pleac.sourceforge.net/pleac_ocaml/sockets.html