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Questions tagged [dune]

Official documentation for Dune is available here: https://dune.readthedocs.io/en/latest/index.html

30 questions
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How to add a library dependency in a dune project that manages the .opam file without an intermediate build error?

dune will generate and update a project's .opam file when you run dune build, letting you just manage the project's dependencies in dune-project. However, this seems to require an awkward step when adding a new dependency. The only sequence of…
Jake
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Including subpackages using dune (no implementation provided for modules, but modules are in dune file)

While compiling a project with dune that uses the fmt and logs packages , I ended up getting this weird error File "_none_", line 1: Error: No implementations provided for the following modules: Fmt_cli referenced from…
tbrugere
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Generating executable .ml test cases from a glob of plaintext files using dune

I'm in the process of writing a test suite for some lexing/parsing and it would be much cleaner if I could drop test input/output files in a directory and have dune generate OCaml test cases for each of these during a step in compilation. I figured…
s1gtrap
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unbound module Base

I am following this tutorial for OCaml when I try to write this program in a file and then compile and execute with dune. open Base open Stdio let rec read_and_accumulate accum = let line = In_channel.input_line In_channel.stdin in match line…
Kronos
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Ocaml: Load an external library from Git in my dune project using opam

I have my main dune project, which includes an implementation for a small parser library. Ideally, I would like to put the parser library into a different package and just depend on that in my main dune project somehow. The way I would do this in…
Prophet
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How to solve this SQL error varbinary = varchar(42)

I am trying to learn something new, might I know what is the error message mean? I tried to change the code in below, then work fine. What is the difference between them?
AnsonChan
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How do I install ocamlfind first properly before other opam packages without root permissions?

I was trying to install some coq packages with opam but have this hack: # coq-equations seems to rely on ocamlfind for it's build, but doesn't # list it as a dependency, so opam sometimes tries to install # coq-equations before ocamlfind. Splitting…
Charlie Parker
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Does dune support glob patterns for libraries?

Background I'm trying to expose two dune libraries from the same directory - one for some interfaces, and the other for their implementations. For example, let's say I have the following sources: foo_api.ml module type Foo = sig val foo:…
Trent Small
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Error installation with some OCaml packages

I am trying to install some Ocaml packages but for some reason I am having some errors with installing dune, ocamlbuild, and ocamlfind. By running sudo opam install ocamlfind ounit utop dune qcheck, the following error came up: [ERROR] The…
hnsvhns
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SQL/DUNE ANALYTICS query for all erc-20 holders on specific date

I was wondering if there was a way to query all addresses holding an erc-20 token on a specific date i.e. wallet address of all wallets holding $LINK on May 1st, 2019. If I'm correct using "evt_transfer" is only showing wallets that bought or sold…
maharishi444
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Dividing two SQL queries

I am not super familiar with SQL queries, but I am trying to divide the results of two queries, ex. # of users with at least $x / total # of users, and I keep running into an error. Here is the code: SELECT x.number / y.number FROM ( SELECT…
Alex
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dune-ocaml : No implementations provided for the following modules:

I tried to compile an OCaml code with Dune but got the following error: Error: No implementations provided for the following modules: CallccBp referenced from bin/.CallccTest.eobjs/native/dune__exe__CallccTest.cmx by executing the command : $ dune…
MMY MMY
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Unable to install OCaml on macOS Mac M1

I had installed merlin 6 months ago to be able to compile Ocaml and I had no problems. I have recently upgraded to update everything but it was impossible to make the package work. When I try to reinstall it I get this error message (opam install -y…
ThéoS
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Using dune in OCaml, does promote overwrite manual changes?

The nice thing about Rust and generated code, is that it can live in the target directory and rust-analyzer makes it easy to go and see what's there. But in OCaml, with dune, if I have a rule to generate some code, for example: (rule (target…
David 天宇 Wong
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How to cast uint256 to varchar in DuneSQL?

How to cast uint256 to varchar in DuneSQL? Here is an example query Here is an output Error: Line 36:11: Cannot cast array(uint256) to uint256 at line 36, position 11 [Execution ID: 01H8J5X9M7BKXB59N0ZFYS4F7J] #dune
xinbenlv
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