Temporary edit external crates that your project depends on

Related tags

Cryptography rust cargo developer-tools
Overview

rhack

Version info

You want to quickly put a sneaky macro kind of like dbg! into external crates to find out how some internal data structure works? If so rhack is for you!

rhack makes it easier to edit external crates code that your project depends on.

Usage

Let's say you want to modify the reqwest crate.

[dependencies]
reqwest = "0.11"

Run the following:

$ rhack edit reqwest

This will make a copy of the crate into $HOME/.rhack/reqwest-0.11.1 and add its path to the [patch] section in your Cargo.toml whose path is automatically detected:

[patch.crates-io]
reqwest = { path = "/home/you/.rhack/reqwest-0.11.1" }

Now your package uses the locally checked out copy instead of one from crates.io. You can now open the files (typically by leveraging the "Jump to Definition" feature) and then feel free to modify the source code.

Undoing

Simply run the undo command then you can undo all of the changes to your Cargo.toml:

$ rhack undo

Keep in mind that this command doesn't remove any copy of crates.

Settings

It uses $HOME/.rhack as the destination to copy the source code of the external crates by default. You can change it by setting and exposing the $RHACK_DIR environment variable.

Installation

For MacOS, Linux, and Windows, prebuilt binaries are available through here.

Debian/Ubuntu

wget https://github.com/nakabonne/rhack/releases/download/v0.1.0/rhack_linux_amd64.deb
apt install ./rhack_linux_amd64.deb

Arch Linux

An AUR package is available.

yay rhack

Cargo

cargo install rhack

From source

git clone https://github.com/nakabonne/rhack.git
cargo build --release
sudo install -m755 target/release/rhack /usr/local/bin/rhack

If you want to generate the man page, you can install it with scdoc.

sudo mkdir -p /usr/local/share/man/man1
scdoc < rhack.1.scd > rhack.1
sudo install -m644 rhack.1 /usr/local/share/man/man1/rhack.1

Acknowledgements

This tool is highly inspired by gohack. It clearly stimulated an incentive to creation. A big "thank you!" goes out to them.

Comments
  • Update to clap v3 (and other dependencies as well)

    Update to clap v3 (and other dependencies as well)

    Recently a lot of tools broke for me when I had to reinstall them via cargo install. Interestingly that install command doesn't respect the lock file per default.

    Nevertheless we want our dependencies up to date, esp when on beta branches and breaking changes. I hope clap doesn't break more before the final release.

    Here the changes were fairly simple.

    Additionally:

    • cargo update everything
    • fix issues for updates (mainly toml_edit changes)
    • apply cargo clippy recommendations

    Reference: https://github.com/clap-rs/clap/blob/master/CHANGELOG.md#305---2022-01-05

    opened by asaaki 2
  • feat: use the workspace manifest root

    feat: use the workspace manifest root

    When using cargo locate-project, specify the --workspace option. This will provide a different result when within a workspace, providing the path to the top-level Cargo.toml file instead of the one for the workspace member. Patch changes to workspace member TOML files will not alter builds and will display a warning instead.

    For projects that do not use workspaces, the output of this command is identical to the previous version.

    opened by alexander-jackson 1
  • chore: enable colored help screen

    chore: enable colored help screen

    Probably personal preference, but I find it easier if commands have colored help as it is easier to distinguish the different sections of the help screen. People who do not want colors in CLIs almost always have NO_COLOR set anyway, so this won't affect those people, as clap follows the no color specification: https://no-color.org/

    opened by mainrs 1
  • Add a man page and mention AUR repo

    Add a man page and mention AUR repo

    I love the tool so I added some more docs and packaged it for Arch users at https://aur.archlinux.org/packages/rhack/

    rhack-man

    The file rhack.1.scd is in scdoc format, which is a more human readable format for these documents than TROFF.

    I also added a tiny Makefile so users don't have to figure out how to generate the man page themselves, and can install them together.

    The normal cargo build workflow is of course unchanged.

    This will need a small update to the release GitHub action, but I can't easily test it from this PR.

    opened by bradfier 0
  • Perhaps consider renaming it to cargo-hack?

    Perhaps consider renaming it to cargo-hack?

    Seeing as it deals with cargo more than rust and the usage of the term cargo is even encouraged for such things? This would hopefully let me just issue cargo hack and get done with things :). Small thing but I think it might matter

    opened by asdf8dfafjk 4
Owner
Ryo Nakao
Hej!
Ryo Nakao
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