nix | Nix, the purely functional package manager | Functional Programming library
kandi X-RAY | nix Summary
kandi X-RAY | nix Summary
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
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QUESTION
I need my user environment configured with Python and the beancount module available. The way I'm currently doing this is to add this package to home.packages (I am using home-manager):
ANSWER
Answered 2022-Mar-29 at 15:46Please take a look at https://github.com/NixOS/nixpkgs/blob/master/doc/languages-frameworks/python.section.md#overriding-python-packages-overriding-python-packages on how to overwrite python packages.
Example overlay from my that I used a while back:
QUESTION
ANSWER
Answered 2022-Mar-23 at 13:47If you look at the file you can see that the code inside the macro libc_bitflags!. The definition of the macro is here. There you can see that the macro ::bitflags::bitflags! is called and that libc_bitflags almost redirects the full input to bitflags. You can read more about that crate here.
Now to your questions:
OFlagwill be after macro expansion a struct with a single attribute which is of typec_int:
QUESTION
I'm unable to automatically derive instances using DerivingVia on any type that uses types from optics-core like Prism'; the error I get from compiler is:
ANSWER
Answered 2022-Mar-15 at 23:46Generally speaking, profunctor optics (such as those used in the lens and optics packages) aren't directly coercible. Roughly speaking, the internal representation of a prism is something like:
QUESTION
Using the os/exec package, I want to run an external command on a *nix OS with another user instead of root. (The main process runs under root user).
The external command runs by go app. But my app can not read /proc/pid/smaps file, following error:
ANSWER
Answered 2022-Mar-05 at 17:54I test my code inside a docker container that doesn't have SYS_PTRACE capability. That's why the error shows. The error was gone when I added the SYS_PTRACE capability for that container.
QUESTION
How can I resolve this sysmalloc assertion:
main: malloc.c:2542: sysmalloc: Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.
Am I making some obvious memory related errors in the 2 functions Valgrind refers to (i.e. set_slice_array() and print_int())?
After doing some research, it seems that the error I'm seeing potentially could be caused by me overwriting some record (that malloc needs) on the heap of its past allocations. But I'm still learning the ropes of dynamic memory allocation in C, so I'm not sure how to resolve the issue(s).
Running my program through Valgrind, gives me the following info (and two hints about an "Invalid write" and an "Invalid read"):
...ANSWER
Answered 2022-Feb-21 at 10:55QUESTION
I want to create a Cabal project with the possibility to include multiple packages in the same project. When I read Cabal documentation, it says that one has to create a "cabal.project" file. Is this file created manually into the project root or is there a command to create it? The documentation says that all modifications shall be made in the "cabal.project.local" file. How this file is created? Does this mean that to create a cabal project with multiples packages one has to have a "cabal.project" file and a "cabal.project.local" file in the same project root? Thanks.
...ANSWER
Answered 2022-Feb-16 at 13:17Don't overthink this. A cabal.project file is mostly just listing some packages that you want to build together as a unit, instead of pulling them from Hackage. So yeah, simply create it manually.
What the docs mean by ‘all modifications shall be made in the "cabal.project.local" file’ is that the cabal.project should specify what is always needed to build the project (e.g. packages that simply aren't on Hackage at all, but are included in your repo either directly or as Git submodules), whereas if you just make some tweaks (e.g. experimentally testing out what needs to be changed so your package will compile with a new version of some 3rd-party dependency, which you've checked out locally before considering to file a pull request or to fork it into your own repo) then this should go in the cabal.project.local file. But honestly, you could as well make the changes in cabal.project and then simply not git add them†.
IMO all actually important information to make the package future-proof should reside in the packagename.cabal file and/or a stack.yaml file, not in cabal.project.
†The danger here is that it's easy to accidentally commit changes that were only meant to be local to already-VCS'd files. I always use git add -p so that I review any changes I'm adding, before committing.
QUESTION
for a university project I am testing the log4j vulnerability. To do this, I use a python server that connects to the java client by creating a reverse shell. Everything works except the output to server which is not displayed correctly. Specifically, the server shows the output of two previous inputs and I'm not understanding why. I'm new to python and java programming so I'm a little confused.
Initial project: https://github.com/KleekEthicalHacking/log4j-exploit I made some changes and added a python socket to handle the reverse shell.
PS: with netcat it seems to work fine but command with some space non work (ex: cd .. not work)
For run this project i use kali linux (python server) and ubuntu (java webapp). This code does not yet manage clients with windows os
poc.py + exploit class:
...ANSWER
Answered 2022-Feb-11 at 11:36Now works. I added time.sleep(0.2) after each sendall in rce.py
QUESTION
If I look at the outputs provided by the haskell.nix flake from a M1 computer, it starts building ghc-8.8.4 etc..
...ANSWER
Answered 2022-Feb-08 at 13:36haskell.nix depends heavily on what is commonly called "import from derivation" or IFD. These are expressions such as
QUESTION
I am trying to build my Rust crate as static lib to furter use it within Golang through FFI.
So far tried buch of different approaches regarding linking, but still having undefined reference kind error from final go binary:
ANSWER
Answered 2022-Jan-19 at 10:30The problem was in right flags for CGO. This is how header for CGO in main.go looks now
QUESTION
I have two Nix Flakes: One contains an application, and the other contains a plugin for that application. When I build the application with the plugin, I get the error
...ANSWER
Answered 2022-Jan-04 at 20:29The reason is that the file modules.txt generated as part of vendoring will contain the nix store path in the replace directive in this scenario. The vendor directory is a fixed output derivation and thus must not depend on any other derivations. This is violated by the reference in modules.txt.
This can only be fixed by copying the plugin's sources into the sources derivation – that way, the replace path can be relative and thus references no other nix store path.
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