cli-guidelines
bubblewrap
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about 1 month ago | about 1 month ago | |
CSS | C | |
Creative Commons Attribution Share Alike 4.0 | GNU General Public License v3.0 or later |
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cli-guidelines
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Ask HN: What are some command line utilites that have great UX?
I can't think of any cli tools with great UX :( usually the important tools have lots of obtuse commands, and the small neat tools only have a couple trivial options.
But here's some guidelines as you make your own tool: https://clig.dev/
I always appreciate tools with examples and a good help text. Also the ability to pipe with stdin/stdout if possible.
- Ask HN: Where to read about terminal UIs?
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Ask HN: Do you read Secrets from Environment Variables
The Command Line Interface Guidelines [1] says:
> Do not read secrets from environment variables
> Secrets should only be accepted via credential files, pipes, `AF_UNIX` sockets, secret management services, or another IPC mechanism
Which one of these do you use? On github it seems common for projects to use environment variables for secrets.
[1] https://clig.dev/#environment-variables
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Command Line Interface Guidelines
Seems they took a small step back from their previous "don't bother with man pages" stance. Now it's "Consider providing man pages."
I still find it a rather shocking order of priority, honestly.
https://clig.dev/#documentation
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Ask HN: Best way to do scoped commands in a CLI app
- E. `blah project foo --edit`
Wondering if there was any guidance on this from the UNIX people. Perhaps scoping should be done using the file system. `cd path/to/project && blah edit`. Like git does with `git --cwd=path/to/project`. Maybe a virtual FS could even be used. Then you wouldn't have to continuously type in the scope with each command. Interesting thinking about how to maintain state in the terminal...thinking about how Python's virtual env bin/activate modifies the shell.
Found an interesting guide here: https://clig.dev/
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CLI user experience case study
Capturing these guidelines is one of the primary reasons that https://clig.dev/ exists.
bubblewrap
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Docker, Linux, Security. Kinda.
As an example we will look at man 1 bwrap. Bubblewrap allows us to sandbox an application, not too dissimilar to docker. Flatpaks use bubblewrap as part of their sandbox. Bubblewrap can optionally take in a list of syscalls to filter. The filter is expressed as a BPF(Berkley Packet Filter program - remember when I said docker gives you a friendlier interface to seccomp?) program. Below is a short program that defines a BPF program that can be passed to an application using bwrap that lets us log all the sycalls the application makes to syslog.
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I Use Nix on macOS
Nothing nix specific but you may be interested in https://github.com/containers/bubblewrap
- I reduced the size of my Docker image by 40% – Dockerizing shell scripts
- Exploring Podman: A More Secure Docker Alternative
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Using GitLab Kubernetes Runners to Build Melange Packages
Recently, I came across Chainguard and wrote the article How to build Docker Images with Melange and Apko. As a fervent supporter of Kubernetes and GitLab CI, I was eager to experiment with building images using Melange in this particular setup. GitLab's shared Runners work seamlessly with Bubblewrap, eliminating the need for additional configurations. This post is intended for enthusiasts like myself, interested in hosting their own Kubernetes Runners and leveraging the Kubernetes Runner Type of Melange.
- how strong is the steam (runtime) sandbox for games?
- Server-side sandboxing: Containers and seccomp
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A Study of Malicious Code in PyPI Ecosystem
```
This is basically manually invoking what Flatpak does:
https://github.com/containers/bubblewrap
This is also useful for more than just security. E.G., you can test how your app would behave on a fresh install by masking your user configuration files. I personally also have a tool that uses it to basically bundle all dependencies from an entire Linux distribution in order to make highly portable AppImages— Been meaning to post that, will get around to it eventually maybe.
The flags above should hide your user data (`--tmpfs`), disable network access (`--unshare-all`), hide/virtualize devices and OS state (`--dev` and `--proc`), and make the rest of the root filesystem read-only (`--ro-bind`— Including the insecure X11 socket in `/tmp`, which you might want to expose for GUI apps).
Check them against `bwrap --help`; I might have omitted one or two more things you'd need.
- Bubblewrap – Low-level unprivileged sandboxing tool used by Flatpak
What are some alternatives?
redox - Mirror of https://gitlab.redox-os.org/redox-os/redox
firejail - Linux namespaces and seccomp-bpf sandbox
nodejs-cli-apps-best-practices - The largest Node.js CLI Apps best practices list ✨
flatpak - Linux application sandboxing and distribution framework
typer - Typer, build great CLIs. Easy to code. Based on Python type hints.
flathub - Issue tracker and new submissions
argparse-benchmarks-rs - Collected benchmarks for arg parsing crates written in Rust [Moved to: https://github.com/rosetta-rs/argparse-rosetta-rs]
nsjail - A lightweight process isolation tool that utilizes Linux namespaces, cgroups, rlimits and seccomp-bpf syscall filters, leveraging the Kafel BPF language for enhanced security.
picocli - Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
distrobox - Use any linux distribution inside your terminal. Enable both backward and forward compatibility with software and freedom to use whatever distribution you’re more comfortable with. Mirror available at: https://gitlab.com/89luca89/distrobox
cligen - Nim library to infer/generate command-line-interfaces / option / argument parsing; Docs at
multipass - Multipass orchestrates virtual Ubuntu instances