The fish shell is amazing

441 points4
jonfw4 days ago

I used fish for a couple of years and really liked it. But I recently learned that I can configure ZSH to have all of the same auto-complete and plugins that I loved from fish. Now I have all of the creature comforts I like, with POSIX compliance

I found that while fish has better syntax than bash for most things, the hassles with incompatibility or unexpected behavior brought me much more trouble than BASH's syntax ever has

mattgreenrocks3 days ago

The best reason to choose fish over zsh is that everything works so well out of the box that you stop messing with it.

I haven’t tweaked my shell config in 7 or 8 months now.

This is a different mindset from the giant zsh configs, “plugin managers” and other junk that is wholly irrelevant to using the shell. You’d think that fish incorporating a lot of functionality that zsh has would manifest as bloating fish, but, IMO the reality is that zsh’s “bloat” is pushed into user configuration and the user is tasked with making it work.

pxc3 days ago

> The best reason to choose fish over zsh is that everything works so well out of the box that you stop messing with it.

I've found that sometimes the opposite can be true (in a good way!). At one workplace, I introduced Fish to some fellow developers who until then mostly saw using the command line as a strange, difficult, and unpleasant part of their jobs.

Once I got them started with Fish, they were happy enough with default interactive behaviors, convenient documentation, and simple scripting syntax that it encouraged them to do a little more scripting, and eventually to customize some of the aesthetic stuff by writing custom prompts!

It was pretty cool to see.

resonious3 days ago

Even less ergonomic shells like bash can work very well out of the box if you just train yourself to use them. If you train yourself to use bash without any plugins, you'll be strong on any machine without any config.

I went through a "distro hopping" phase at some point with Linux and ended up settling on a system with very little custom config. It's close to the defaults so I can work very comfortably even in a random server.

Of course this is not ideal. If you have a tool or set of config that you like, then you should use it. I've just found that the human brain can overcome bad UX quite well with a little effort ;)

II2II3 days ago

There are other benefits to your approach. Relatively little time is spent configuring software and it tends to be easier to copy over a handful of simple configuration files than to replicate a complex setup.

tekknik2 days ago

Put your configuration for stuff like this in a private github repo.

wyclif3 days ago

What I do on Linux is keep bash with a minimal config, and then have zsh with oh-my-zsh and all the other goodies. I used bash for a long time, so I don't get too confused by context switching.

bscphil3 days ago

> The best reason to choose fish over zsh is that everything works so well out of the box that you stop messing with it.

This is such an incredibly odd perspective to me. I use zsh and have not touched my shell config in years. Messing with configurations to get things working to your liking is a one time thing. I don't even use plugins.

On the other hand, if fish doesn't work to your liking out of the box, and for many people it does not, there's no "messing with it" that's possible. You are forced to give up and use something else. Your reason to choose fish is only a good reason if you already agree with every minute choice the developers made and refuse to let you adjust.

OJFord3 days ago

> On the other hand, if fish doesn't work to your liking out of the box, and for many people it does not, there's no "messing with it" that's possible.

What do you want to do that isn't possible? I also haven't messed with it in months if not more (fish in my case, not zsh) but years ago I messed with the prompt a lot to get it to my liking. (From a previous zsh config.) It was perfectly possible.

shakna3 days ago

> On the other hand, if fish doesn't work to your liking out of the box, and for many people it does not, there's no "messing with it" that's possible. You are forced to give up and use something else. Your reason to choose fish is only a good reason if you already agree with every minute choice the developers made and refuse to let you adjust.

Which part of fish makes this impossible? You can tweak the startup, the completions, the key bindings, the prompt, and so on.

NavinF3 days ago

Another issue with zsh plugins is that they are incredibly slow. Oh-my-zsh makes every terminal feel like it’s running on another machine over ssh

rubyist5eva3 days ago

Ditch omz and use Prezto with the Powerlevel10k prompt (just change the theme in the zpreztorc file to 'powerlevel10k' and restart your terminal), follow the initial prompts for setup, with "instant prompt" enabled and you'll never go back.

linsomniac3 days ago

Thank you for this, I had somehow stumbled across powerlevel10k years ago on my "fooling around" laptop and liked it but couldn't remember how I'd gotten there. Long time zsh user here, just last week started playing with oh-my-zsh to integrate into my main system's shell environment.

gjvc3 days ago

this is probably the git plugin doing a "git status" or similar. Check the "plugins" array in .zshrc

mattgreenrocks2 days ago

Hence, my issue with the "infinitely configurable" idea: once you add plugins to the mix, it feels like responsibility for the end user experience falls on no one, so the users end up shouldering that, and, worse, sometimes develop a Stockholm Syndrome for it.

For example, to me, it is _insane_ that in 2021 async prompts are not a completely solved problem. The shell should provide a mechanism to do so easily, rather than duct-taping thin veneers over syscalls via a scripting language.

tekknik2 days ago

But we have the same in the fish world (my prompt shows me which branch i’m on if my working dir is a git repo) and it’s not slow.

alerighi3 days ago

You don't need that much plugins at all. The only plugin that I use is gitstatus, and zsh-syntax-highlight, and both of them are avoidable without loosing features.

RMPR3 days ago

And that delay when it updates itself is just the worst

smohare3 days ago

This is the framework, not the plugins.

AlphaSite2 days ago

I use starship and it’s been pretty great and very fast.

pmarreck3 days ago

I thought there was something in, like, Powerman10k or something, which managed to avoid that issue?

kekebo3 days ago

You probably mean powerlevel10k[0], although that's mostly a replacement of powerlevel9k, which is only one of the (theming) plugins that oh-my-zsh commonly handles.

As for a replacement for oh-my-zsh itself, I had good experiences with zgen[1] but the fastest I've found is zim-fw[2] which produces acceptable start times for me[3].





favadi3 days ago

It sounds like oh-my-zsh issue, not Zsh.

canjobear3 days ago

I use fish. I haven’t tweaked my shell config in 9 years

tekknik2 days ago

Not to mention the speed of fish vs zsh launching is quite noticeable, zsh taking a second or so longer to launch

Lhiw3 days ago

I haven't touched my zsh config in years.

Omz != Zsh.

dietr1ch3 days ago

I moved from bash => zsh => fish. I wanted reasonable features on my shell, and fish was much faster and needed almost no plugins.

The fact that I can write a simple for loop without needing to look up how to do it by far beats the POSIX compatibility, if I need it I can still write a bash script, but when using the shell I don't need to recall where semicolons or `do`, brackets (and how many) go.

macromagnon3 days ago

Is it that hard to remember a bash for loop?

  for i in $(seq 1 10)
  do echo $i
Then you can just replace new lines with ; if writing a one liner.

  for i in $(seq 1 10); do echo $i; done
I guess it isn't as simple as python

  for i in range(10): print(i)
but it's pretty close aside from the variable binding.
shakna3 days ago

Bash has some subtleties around loops that can be frustrating, like the body of your loop _may_ actually be running in a subshell (common when iterating over a file), making it difficult to extract what you want from it.

bandie913 days ago

i bet it's the `cat file | while read …` loop what you are referring to, not any loop. but correct me.

alerighi3 days ago

In zsh you can avoid the do if you have a single instruction:

    for i in {1..10}; echo $i
to me is as clear as the python version. Very compact and useful for one liners.
ulam23 days ago

As someone dealing with new remote machines on a daily basis, I cannot fantasize about any other shell. Bash is pretty straightforward.

yesenadam3 days ago

  for i in {1..10}
tekknik2 days ago

And look at all of those finger bending symbols!

thibran3 days ago

> I moved from bash => zsh => fish

Did the same, but moved on.

Now it is: bash => zsh => fish => nu

stevage3 days ago

What did you prefer about nu?

thibran3 days ago
ayushnix3 days ago

I don't get why people expect POSIX compliance from fish. Your interactive shell and your scripting shell can be, should be, and often are, different.

I use bash as my default user shell, fish as the default shell of my terminal emulator, and I write scripts for both POSIX sh (dash and busybox ash) and bash. I end up using three different shells with different purposes.

Sure, I could use zsh both as an interactive and scripting shell but I don't have the time or willingness to configure it when fish offers a nice out of the box experience. Not to mention that zsh shouldn't be used as a scripting shell in the first place.

alerighi3 days ago

Then you have to learn two languages. And switch from one to another when you need to do some scripting.

I don't write shell scripts a lot, I prefer to write python scripts (that are more maintainable and simple to write). But I write complex commands in the shell a lot, for example I may need to convert a bunch of images from one format to another, just use a for loop with imagemagik directly from the command line, then maybe a regex with sed to rename them, and done. It's not rare that I write commands that are more than 5 lines long.

With all the quirks of POSIX shell scripting languages (well in reality I use zsh that is nicer) they let you hack things together fast, and that makes them powerful.

ayushnix3 days ago

> Then you have to learn two languages.

Why would I need do to that?

> But I write complex commands in the shell a lot ... It's not rare that I write commands that are more than 5 lines long.

Ah, well, yeah, in that case, you might wanna stick to ZSH. I don't write complex commands on the shell. If it's more than 1 line long, I will make it a script. Multiple lines of commands with, or without, backward slash separators look ugly and unwieldy to me. A text editor like vim would do a far better job handling those 5 lines instead of an interactive shell.

renewiltord3 days ago
tekknik2 days ago

> Then you have to learn two languages. And switch from one to another when you need to do some scripting.

The more languages you know the more valuable you are. I prefer to only write golang but sometimes that leads to typescript, Makefiles and bash scripting as well.

pxc3 days ago

> Not to mention that zsh shouldn't be used as a scripting shell in the first place.

Why not? If I'm writing scripts for automating configuration on modern macOS, for example, where ZSH is installed by default, why not write ZSH scripts?

ayushnix3 days ago

> Why not? If I'm writing scripts for automating configuration on modern macOS, for example, where ZSH is installed by default, why not write ZSH scripts?

I guess there are two reasons

- if the script doesn't need arrays, POSIX sh (dash) scripts will be much faster than bash/zsh scripts

- if you do need arrays, bash is vastly more ubiquitous than any other shell on the planet right now (except POSIX sh). It's installed on almost all Linux distributions by default. I'm not gonna use a ZSH script because I'd have to install ZSH, which seems unnecessary. A good example is tomb, which is a ZSH script for encryption on Linux.

If you're sure that your scripts will always run on macOS, use POSIX sh if you don't need arrays and ZSH if you do need them.

DavideNL2 days ago

Good advice, thank you..

R0b0t13 days ago

It's more "why not write scripts?" Actually making use of a shell's control structures is code smell until we have far better shells than we currently do. They're optimized for user interaction, not necessarily anything else.

pxc3 days ago
xkgt3 days ago

I am a fish shell user, but for me the biggest drawback is that a lot of tools rely on updating bashrc as part of installation and some of them don't have an equivalent ``.

ayushnix3 days ago

> ... a lot of tools rely on updating bashrc as part of installation and some of them don't have an equivalent ``

such as?

waterhouse3 days ago
Aloha3 days ago

Exactly this.

I script in bash (though I'm super interested in oil), and use fish as my interactive shell, it's pinned to screen 0 in my screen session.

Macha3 days ago

Interestingly I moved from such a zsh setup to fish a couple of years back. Zsh with add-ons was noticeably slow compared to fish and syncing the config to all the devices I used.

ulzeraj3 days ago

ZSH plus oh-my-zsh cd’ing into a git repo with large LFS files will hang your shell even on very fast NVME storage.

adrusi3 days ago

You can get reasonable version control integration from zsh without any kind of wild oh-my-zsh config. Most distributed versions of zsh are compiled with vcs_info enabled.

    autoload -Uz vcs_info
    zstyle ':vcs_info:*' enable git hg
    zstyle ':vcs_info:*' check-for-changes true
    zstyle ':vcs_info:git*' formats "%{$fg[cyan]%}(%{$fg[green]%}%s %{$fg[blue]%}%r%{$fg[cyan]%}:%{$fg[green]%}%b%{$fg[yellow]%}%m%u%c%{$fg[cyan]%})%{$reset_color%} "

    setopt prompt_subst
    export PROMPT="%{$fg_bold[red]%}%n%{$reset_color$fg[white]%}@%{$fg_bold[green]%}%m%{$reset_color$fg[white]%}:%{$fg[cyan]%}%1~ \${vcs_info_msg_0_}%{$fg_bold[white]%}%(#.#.\$) %{$reset_color%}"
ivank3 days ago

I found that all I really wanted to show was the current branch, which I do with

tekknik2 days ago

You can do this in fish with a direct call to git branch, and it’s not slow and doesn’t require catting files:

  set -l git_branch (git branch 2>/dev/null | sed -n '/\* /s///p')
  if test -n "$git_branch"
    echo -n -s (set_color yellow) "<$git_branch>" (set_color normal) " "
xondono3 days ago

That’s the git plugin doing it’s thing. You can fix it in config but I admit is an annoying default.

wirthjason3 days ago

Any suggestions?

I’ve recent switched from vanilla bash to ZSH. I mainly use oh-my-zsh and Power10k. Once again the defaults without much customization.

animal_spirits3 days ago

My only plugins are zsh-autosuggestion ( zsh-syntax-highlighting ( and zsh fzf-tab ( its been wonderful using these plugins

anamexis3 days ago

I prefer prezto to oh-my-zsh for performance reasons.

Bayart3 days ago

Slimzsh[1] is a very nice default configuration. Just a slim prompt, fast-syntax-highlighting and some vanilla settings.

I keep a personal fork with a few added plugins (most notably zsh-autosuggestions and ssh-agent). No need for a plugin manager.

oh-my-zsh is way too bloated. But it's a nice repo if you're looking for plugins and aliases.


mattgreenrocks3 days ago

The popularity of OMZ with the performance issues and update nags really makes me wonder if people even notice or care about those two things.

wyclif3 days ago

If you use just a few plugins, it's really not that slow. But if you have a lot more, performance might become a real issue.

DeadAndHorny3 days ago

Better to use zgenom, it supports almost every plugins and faster.

disk03 days ago

zinit did wonders for my config, would highly recommend:

GhettoComputers3 days ago

I just start scripts in bash for compatibility at the beginning or use scripts that state it, avoid scripting as much as possible, and I spent a lot of wasted time with configuration of zsh to get most of the functionality of fish but never as good. What did you install?

progforlyfe3 days ago

Sadly this is the exact reason I switched away from it. I couldn't copy/paste in commands from coworkers or use common web projects (I'd have to either search for a fish replacement or convert it myself... Or just launch bash/zsh).

Really nice shell though, I hope it gets more traction.

jscheel4 days ago

This is my problem as well. I’ve been using fish for quite a long time, and I’m still frustrated by weird posix incompatibility.

dangus3 days ago

bass can be helpful for some of those posix issues:

Another random tip: python virtualenv generates a script that you should use instead of the plain activate script.

emptysongglass3 days ago

Bass has never worked for me, in any scenario. I'm curious to see how you use it. I have never successfully been able to feed it any bash script. At this point I suspect I'm either holding it wrong or it is a thing that is invoked as a thing that works without ever being used in earnest.

dangus3 days ago
Macha3 days ago
lovelyviking3 days ago

>I’m still frustrated by weird posix incompatibility.

Can you also share what are the most significant problems with posix incompatibility for you? Why is it a problem?

jscheel3 hours ago

Honestly, I think it’s just fighting years of muscle-memory more than anything. Not necessarily a valid complaint, I know.

mey3 days ago

The one I see is really, all of Linux vs OSX/MacOS. And which version of Bash is shipped by default.

Internally we have a boot strap run book developers/operations to bring up either Windows/WSL or MacOS to a consistent shell env.

preseinger3 days ago
bamboozled3 days ago

Same, I used oh-my-zsh, I mucked around and didn't use it for some years, but since re-installing it, I have to say it's one of the most useful and reliable software packages I know of.

I kind of forgot that even use it until I read your comment :)

saagarjha3 days ago

zsh is not POSIX compliant and never had a goal of being POSIX compliant. (Amusingly, I use bash and I can pretty much replace “zsh” in your claim with “bash” and have it apply to my usage-except in this case it would be true :P)

ch_1233 days ago

zsh has a POSIX compatibility mode, but it is not enabled by default. (You can see some details in the release notes:

binarysneaker3 days ago

Came here to say the same. The default zsh config in Kali has some pretty nice autocompletions, which I've borrowed and use on all my other systems.

max_3 days ago

It is understated how powerful and ergonomic ZSH is.

I hated Apple, but my opinion changed when I learned how to configure ZSH.

rainingmonkey4 days ago

POSIX compliance has never brought me any issues, if I want bash syntax I just use `bash -c COMMAND`. You can invoke bash scripts with `bash SCRIPT` or just add the bash shebang `#!/bin/bash` to the top of your script, set the executable bit and invoke directly.

ribit4 days ago

I really love fish and the philosophy behind it, especially the "configurability is the root of all evil" attitude. Makes for a well though out software that is a true pleasure to use.

ziml773 days ago

I love that philosophy too. If there's too many knobs to turn I'm going to constantly fiddle with them. The only things in my are calls to scripts to setup iTerm 2 integration and the Starship prompt.

thibran3 days ago

Most of it is nice, but declaring global variables with 'set -gx FOO 123" sucks. Same for "abbr --add g git", why can't it be just "abbr g git" or "set-global FOO 123"?

spoils192 days ago

Exactly. I know a lot of people will disagree but my advice to more junior guys is always get rid of the toys and learn the tools.

vasergen3 days ago

I like software where you don't need to spend hours or even days on configuration and it just works out of box. Unfortunately the different syntax is no go for me. I have a bunch of scripts which I can run on my local machine and remote interchangeably. Even if syntax is better I want to learn rather `one syntax` that work everywhere. But that is only one thing that prevents me from trying it.

jaredklewis3 days ago

Maybe it’s a personal quirk but all of my shell scripts have a shebang (#!) header anyway.

I’ve used fish as my shell for years and still have so far never written any shell scripts in fish. It may also be a nice scripting language, but I personally use it because it’s a fantastic interactive shell.

tomxor3 days ago

Mine even have a #!/usr/bin/env which I never shook due to going back and forth between Linux and FreeBSD at one point (bash isn't where you might expect).

I think i'd be up for trying out a new shell for my command line, it's rare I use shell specific syntax heavily for one liners... unless I just don't know it yet.

Hamuko3 days ago

Just add #!/usr/bin/env bash?

canjobear3 days ago

Just invoke your scripts with sh or bash

stevage3 days ago

I basically always do that anyway. I never get around to working them executable so I just do


Which is actually easier to type than


aembleton3 days ago

Especially as you can probably just type 'foo' followed by up arrow

j4hdufd83 days ago

Agreed. Wish there was a pretty shell like fish that used /bin/sh under the hood.

iamevn4 days ago

I've found fish to be absolutely wonderful for shell scripting. I can throw together a loop or a function with the sort of confidence I never could have in bash.

pxc2 days ago

Scripting in Fish is great in that even when you're still pretty new to Fish, you almost never have to think much about syntax or worry about quoting/word splitting behavior. It feels a little LISP-y, in a good way.

thrwyoilarticle3 days ago

Shells and scripting languages are different things. I don't care how good of a scripting language Powershell is, it's painful to use as a shell. I don't care that fish can't run sh scripts, I've never used it on a machine that didn't have sh. Can we stop judging oranges for their lack of crunch?

pxc3 days ago

Ideally you do want them to be the same, so that the skill of using one reinforces the skill of using the other, and you can begin to shape scripts out of your shell history.

Output redirection doesn't work right with Fish functions, which makes them unusable in certain kinds of scripts. Aside from that, though, Fish is perfectly pleasant for simple scripting. I use Fish for simple stuff and PowerShell for anything serious. Some day I'd like to use something like Elvish or Nushell for both, and use the same language as my interactive shell.

MaulingMonkey3 days ago

> Ideally you do want them to be the same, so that the skill of using one reinforces the skill of using the other,

I've used several dozen shells, script languages, and programming languages - and have needed to do within the context of a single job. What's one more? For an interactive shell I prioritize writeability, and for scripts I prioritize readability and maintainability. These are often at odds - not just in what I write, but in the syntax itself - and by making my shell and script the same, I make middling compromises resulting in a jack of all trades that is a master of none.

I disagree that this is "ideal".

> and you can begin to shape scripts out of your shell history.

It's been my experience that this is quite doable even when the scripting language has different syntax than your shell. Oh, sure, it's not as simple as Copy+Paste - but it's never that simple. Even simple shell scripts inevitably end up needing error checking, sanity checks, error messages, ...

buu7003 days ago

Agreed. I liked fish last time I tried it (probably over a decade ago), but bash scripting is what I'm familiar with and it's just so convenient in day-to-day usage to be able to throw out one-liners for mundane things and then have them permanently searchable in my history.

yourad_io3 days ago

I thought Ctrl+R was cool but in fish you are always in search mode! Start typing any part of your previous command and hit up arrow!

kaba03 days ago

Bash scripting and convenient is strange in the same sentence. Bash is an abomination that should not even exist. Like, even thinking about a line of bash code will have 3 bugs.

aembleton3 days ago

Have you just tried the following to run your bash one liners in fish?

  bash -c 'echo "hello"'
Replacing echo "hello" with your script.
buu7003 days ago
emersion3 days ago

It's pretty common to copy-paste POSIX sh one-liners, or `source` a simple script. fish makes this annoying to do.

CGamesPlay3 days ago

Actually, in the last few years this gripe has gone away, at least for me. Once they added proper support for `VAR=val cmd && othercmd`, I haven't run across any one-liners that didn't work in fish.

shepherdjerred3 days ago

I’ll trade the occasional minor annoyance for the day-to-day ease of use that fish provides

joshmanders3 days ago

The only issue I ran into this was when the one liners had subshell syntax $(cmd here), and all I had to do was convert $() to just ().

mattgreenrocks3 days ago

AFAIK that will be remedied in an upcoming release.

ryenus3 days ago

Indeed, the following should work with upcoming fish 3.4:

    echo "pwd: $(pwd)"
KptMarchewa3 days ago

bash -c "PASTE_HERE"

adrusi3 days ago

That's annoying when you have complex quoting in the pasted script, but you can always do

Works for everything unless the pasted commands set variables you want to use.
alerighi3 days ago

Because for you these are two distinct phases. But how many times you use a for loop for launching the same command multiple times? How many time you pass the output of the command as a parameter to another with $(command)? Or you use variable to save things?

Beside very basic usage, a shell is really a REPL for a scripting language. You can type commands but also you can do most advanced things (and that is what makes shell powerful). For example I maybe have to convert all the video files in a directory, and then upload them to a server, I can easily do that with a for loop in the shell, without creating a script.

And since you use both the shell to type commands and to write effectively scripts as in a REPL, that means that you have to learn another completely different programming language, the fish language (of course I assume that you already know POSIX scripting), and not only that, it's probably the case that only on your computer you have fish but it's not installed on every other system, so when you are using another computer (a server, a computer of a coworker that you are helping, etc) you will make mistakes because you confuse the fish syntax with the one of POSIX shell.

Yes, it's true that bash extends POSIX, and zsh too and it's not even compatible 100% with bash, but the differences are in things that it's rare that you will use in a basic script, and all these shells can understand POSIX syntax. A for loop it's the same in sh, bash and zsh (there is a shorter syntax in zsh, but the base one is the same), while it's completely different in fish.

smoldesu3 days ago

Yeah, I hear a lot of people throw shade at fish and then act equally surprised when I don't run my scripts with it. Much like Bash, Perl, Python or even ZSH by some respects, fish is just another tool in my toolbox. It so happens to be the one I default to though, which for some reason sends people flying off the handle.

ChrisSD3 days ago

Eh. Tbh I'm find both powershell and unixy shells have their advantages and warts. I'm not sure either is "better". Maybe I'm just not a fan of shells in general.

sandreas3 days ago

Don't forget that if you use #!/bin/sh in POSIX compatible scripts, you can configure /bin/sh to symlink dash shell instead of bash or zsh. Dash will run scripts way faster (up to 4x) because it is less feature blown...

This is the reason, why I try to prevent using bash/zsh exclusive features in my daily use scripts.

nvllsvm3 days ago

I use `#!/usr/bin/env sh` in my scripts to avoid having to overwrite a systems defualt /bin/sh and whatever issues that can result in. Instead, I have ~/.local/bin in PATH with dash symlinked to ~/.local/bin/sh

assbuttbuttass4 days ago

Fish really shines in interactive use, like being able to write fish_vi_key_bindings, and that setting is preserved after restarting fish. Or using funced and funcsave to modify helper scripts, or abbr -s ...

I'm not sure I've ever opened my fish config file, but I'm still able to customize it easily

kbd4 days ago

As another commenter pointed out, while Fish has some nice out-of-the-box features, they’re all achievable in Zsh with a few lines of plugins. And did you know Zsh has a short for loop? Along with fantastic plugins like fzf-tab, I don’t see a reason to use anything else right now.

Though, I’m keeping a very interested eye on Nu shell. They’re doing a lot of stuff right, and I expect it will become a very useful scripting language in its own right even when not used full-time as a shell.

legutierr4 days ago

A recent demo of Nushell given a couple of weeks ago:

ghostly_s3 days ago

Oh wow...finally someone is bringing the great ideas of Powershell to unix. Can't wait to see how this turns out.

michaelcampbell3 days ago

> great ideas of Powershell to unix

Now-If-They-Could-Improve the Syntax To-Make-It-Usable.

nojito3 days ago

At least it's consistent. Verb-Noun

pxc3 days ago

You can run PowerShell on Unix already, but imo it is too slow for interactive use. Getting it to act like a Fish makes it very, very slow

exyi3 days ago
Aloha3 days ago

I can't imagine it being any slower then it already is out of the box.

user-the-name4 days ago

zsh has this absolutely ridiculous case of feature shyness. It has tons of great features, which it goes to great lengths to hide from you for some indecipherable reason.

opk3 days ago

The reason is to preserve compatibility for everyone's configuration that they carefully built up over decades. It's quite hard to change things to enable some new thing without annoying many users. The last time that was tried was in the '90s and there are still zsh developers around who experienced the fallout. I value the fact that my shell doesn't change on me without warning like many GUI desktop environments.

In recent years the existence of frameworks like oh-my-zsh has contributed further to this situation because it has separated the detailed configuration from the base zsh project. It's a pity omz doesn't enable more really. Many things it does are not really useful unless you take the time to actually learn them. A lot of plugins just define aliases but if you don't know what they are, they just sit there unused.

user-the-name3 days ago

Well, yeah, this is the problem. Throw new users under the bus in favour of old users.

meribold3 days ago

I'm usually happy to put some effort into configuration upfront as a new user if it buys me the peace of mind that I won't be thrown under the bus later. OTOH, I recall some classmates being unaware that Vim supports syntax highlighting because the version that was installed on our lab computers didn't enable it by default (this was about five years ago), which also seems like a regrettable outcome.

sprash4 days ago

Many of the features are also achievable with pure bash with (

pxc2 days ago seems pretty cool. The path hacking it does on readlink doesn't work right and causes the CNF handler to launch on NixOS.

I guess it does the PATH hacking based on whether the system is GNU or not so that it can get `realpath`/`readlink -f`-like behavior even on systems that don't natively have that because they include *BSD coreutils.

That might not behave as expected (and is unnecessary) on my macOS systems, either, since I like to keep GNU coreutils (with no `g` prefixes on the executable names) on my PATH there (heresy, I know).

It's also noticeably slower, to the point that there's a bit of jitter as I type.

It's pretty cool, though. If it's any better after I patch the readlink PATH hacking out, maybe I'll configure it for bash on my systems.

gogoyubari3 days ago

I find it amusing when people are discussing all these new shells and features, yet everytime I see someone letting them know they can do these exact same things in bash, there's absolute silence. It's not the first time I see being recommended here with no reactions from the community whatsoever. As for fish, I've used it for a few weeks. Not having POSIX compatibility and GNU readline shortcuts made work much, much harder.

pxc2 days ago

> Not having [...] GNU readline shortcuts made work much, much harder.

That's weird. Fish has all of the GNU readline shortcuts OOTB and has for as long as I can remember

nerdponx4 days ago

Zsh has become an indispensable power tool for me. I am interested in other shells (especially PowerShell), but Zsh is now embedded deep in my brain, next to Vim and Python, and I doubt I will ever seriously migrate away.

That said: what do you like about Nu shell specifically?

kbd3 days ago

> what do you like about Nu shell specifically?

A whole bunch of things:

1. abandonment of POSIX shell syntax. We can do better. I'm happy with Zsh being POSIX-compatible, and that will always be there.

2. a focus on structured data. Nu basically has hierarchical dataframes built-in, along with lots of facilities for their manipulation. There have been a few other attempts at this but the benefits are obvious. Rather than figuring out how to `awk` your way through whatever text output a command generates, command output in Nu is structured and everything can be handled in orthogonal ways.

3. modern conveniences built-in, like syntax highlighting, and AFAIK they want to include features like "do something when you cd into a directory" that we currently need more tools for (i.e. direnv, which I highly recommend!)

4. serious technology. The people behind it are experts and JT has been showing off ( the engine that enables trivially parallelizable loops. No more need for `xargs`.

5. I hesitate to mention "made in Rust" as a feature, but using a modern language for core infrastructure does matter.

kbd3 days ago

I'll put it this way: Nu shell seems perfectly supportive of my philosophy that a shell is basically a REPL for a computer, and they're taking the ergonomics of an interactive REPL along with the programming language that powers that REPL seriously.

The thing is, there's currently NOTHING GOOD for "shell scripting". Shell sucks (yes it does), so for anything more than very short things I'd rather write Python. But Python sucks for shell-like things, parallelization, it has slow startup, and you also can't do things like put environment variables into your session or change the working directory, so you often wind up writing shims (eg. Broot's br alias -

Yes I've looked at Xonsh but maybe the additional syntax is offputting to me. Like, I wouldn't use it as a shell over Zsh (how's Xonsh's fzf support? I don't know, but I know everything's going to support Zsh), and I dunno if I want to use its syntax extensions over just Python. Though It's always on my list of things to re-explore, and maybe it'll click one day. But it being based in Python makes it feel slow (I wrote my prompt in Zig to get it to be fast...)

This is relevant to mention: I wrote a small Python library ( that's basically a DSL for subprocesses, so it tries to make it more convenient to do shell-like things. I find it preferable to shell or Python alone most of the time. Here's an example of its use in my script that creates a new Python project:

I haven't figured out a convenient way to implement shell piping well with Python's pipe operator, or pass through interactive output directly (so things that "update" the display, like poetry and npm don't behave the same as they do interactively) so it's still .9 status, but it works really well for what it is, and you can always write "regular Python" along with it.

Anyway, Nu seems to be an attempt to put a "real" programming language REPL in my shell, from people who have serious language experience, so I'm hopeful it'll be great.

enriquto3 days ago

> A whole bunch of things:

I appreciate the clarity of your message... curiously enough all the things that you mention I see them as anti-features of nushell (except the first one)

1. Posix shell is clunky has its limitations but there's nothing really flawed about it. It is nice to have non-posix shells, though; in that I agree with you.

2. I hate hate hate the very concept of dataframes. They seem like a useless over-engineering. Plain tabular data is a perfect, and the columns of a table are always named 1, 2, 3. The whole point of abstraction is that you do not care about the meaning of the columns of your table, and the programs (like the lovely awk) that deal with these columns do not care either. There's nothing more "orthogonal" than that: filters that do not understand the data but can filter it anyway.

3. syntax highlighting is a very personal issue; in my case I prefer my terminal not to look like a christmas tree.

4. xargs is one of my favorite tools (alongside gnu make and gnu parallel) and there's nothing "unserious" about it. The happiest moments in my programming life are when I get to use these tools. Not using xargs sounds like a nightmare!

5. Rust is definitely an anti-feature to me: it's like a language that was built by picking the worst features of many already ugly languages. I would not really care in what language the shell is written, but I'd rather have it written in saner, "unsafe" languages.

duckerude3 days ago
nerdponx3 days ago

I strongly disagree about data frames. I am a data scientist professionally, and I think the data frame is one of the most important programming abstractions I use.

GrinningFool4 days ago

Thanks for that, fzf-tab was the last missing piece in my setup.

kbd3 days ago

Nice. Yeah it works great. I have an extensive set of git aliases. Yesterday I was merging a branch with `gmn` (`git merge --no-ff`, which is actually an alias to `g mn`, where `g` is an alias to git of course) and it gave me a fuzzy find of my branches through all the aliases.

Edit: also things like `kill`. `kill [tab]` gives you a fuzzy-find list of all your processes so it's way faster to use than ps | grep.

rainingmonkey4 days ago

> while Fish has some nice out-of-the-box features, they’re all achievable in Zsh with a few lines of plugins.

The point of fish is that there is no configuration required.

You don't have to learn to configure it, you don't have to be part of "the community" to learn which plugins to use, you'll be able to sit in front of any fish prompt and have it work as expected without having to move dotfiles around.

kbd3 days ago

That's a cool argument for Fish for beginners. When you spend thousands of hours in a shell that doesn't matter as much. I don't see any benefit for someone who has Zsh set up well, but yes you do have to google once how to configure auto-completion and so on.

ViViDboarder3 days ago

Probably little for anyone who has any shell “set up well”. Just if they are tired of spending time tweaking things and would rather more capable out of the box experiences so they can benefit from features added to the core shell without hunting for plugins.

I use Fish, however I also use Vim and do the plugin hunt there. I enjoy it, but I’m glad to not be doing it for both my environments.

kbd3 days ago

Comparing the "plugin hunt" between vim and zsh is a bit much. I use three for Zsh, just syntax highlighting, autosuggestions, and fzf-tab. I don't use a Zsh plugin manager.

bscphil3 days ago

> The point of fish is that there is no configuration required.

I think it would be more accurate to say that the point of fish is that there is no configuration allowed. If you don't like the out of the box configuration, I would say configuration is still required, but it's unfortunately not available. If you happen to like every single decision the developers made, then I admit having no configuration does mean you end up with a simpler, faster, more maintainable shell.

preseinger3 days ago

> If you don't like the out of the box configuration,

Then either decide to like it -- humans are adaptable, this is possible -- or don't use the thing. Both outcomes are acceptable. A hammer doesn't need to have a configurable grip and head and claw in order to be a good tool.

bscphil2 days ago
pxc2 days ago

Fish isn't that extreme. There's a fair bit of configuration allowed. The devs are just judicious about adding toggles.

You can configure scripting to run at various times, and there are even plugin frameworks for Fish. It just doesn't have toggles for things like language features in the way that ZSH does.

esyir3 days ago

I think this really shows the two schools of thought, and this is reflected in the attitude towards linux too.

A: Linux is amazing, I can configure everything the exact way I want.

B: Linux sucks, I need to mess around with configurations for hours before I get something usable.

A lot of us just want something that works out of the box with amazing defaults. Others want something that can be tuned to their exact preferences. However, configurability comes with it's own costs too.

desireco423 days ago

It is typical HN that everyone is talking about Zsh and how it isn't so bad. And you know what, I used it for a while long time ago, and it is great. I even had config I could transport to another machine when I need.

All that can't be compared with fish out of the box, which is why I am using fish, it will be 10 or so years now. When I say use, I mean that, I just use it, I don't spend time learning it's obscure features, creating scripts etc, no, just use it.

I have alias list that I use to make myself productive and it goes along with me to a new machine. Very slim and simple configuration. That and Vim, but that is another story.

vorticalbox3 days ago

where does one put an alias ?

i have a collection of them in my .zshrc that i would love to use.

iamevn3 days ago

they're just functions so they end up in files in ~/.config/fish/functions/

  $ alias foo bar

  $ function foo --wraps bar --description 'alias foo=bar'
    bar $argv
these two are basically equivalent. you'll need to

  $ funcsave foo
to make it persist. this will write into that functions folder.

there's also abbreviations like

  $ abbr --add ll ls -lh
which expand as you type. ll won't end up in your history because it's expanded before that.
tryptophan3 days ago

Abbreviations are actually brilliant! So much better than aliases. Long live fish.

yourad_io3 days ago

One of my favorite features. I counted then recently - over 100.

The killer feature over aliases is that a) you can edit them and b) you can define them instantaneously.

Did you type `git diff --cached` one time to many? Up arrow -> Ctrl+a -> "abbr gdc " <enter>

Bam. `gdc<space|enter>` now expands to that. It's there forever. And that's how you end up with 100+ abbreviations.

fouronnes34 days ago

I started a new job recently, and I've been thinking about terminals and shells. I love a well configured modern env, but I can't be bothered spending the literal HOURS you need to setup everything... zsh, zsh plugins, fzf, fzf plugins, fd, dot bare, patched fonts, 24 bit terminal color, temrinal color theme, binutils color theme, powerline, diff-so-fancy... I get that the devil is in the details, but come on, can I just have a single "terminal environnement distribution" with sensible defaults and that's it. Something like SpaceMacs/SpaceVim but for all that. I don't want to spend the time configuring and maintaining this wonderful pile of obsolete-and-yet-somehow-still-the-best-we-got technology.

the_duke3 days ago

That's exactly why I use fish.

The default setup is pretty much perfect for what I want. My only additions are fzf for history search, a bunch of aliases and Starship for informative status lines.

jkelleyrtp3 days ago

I use Powerlevel10k + ohmyzsh + Fira code + and the first google entry to "make zsh like fish". Usually takes me about 10 minutes to get set up in a new environment.

mongol3 days ago

I agree with you here. I am like a terminal nomad, I have of course my own computer but there are so many other computers I log in to over the course of my career. They usually have bash and I have learned to just like that. I don't want to maintain one habit for my pet computer, and another when I am a nomad.

colelyman3 days ago

Have you tried ? It is the closest thing to SpaceMacs/SpaceVim for ZSH that I know of.

anamexis3 days ago

If oh my zsh is Spacemacs, then prezto is Doom Emacs:

pm903 days ago

This is why most people have a dotfiles repo in their GitHub.

BugsJustFindMe3 days ago

> most people have a dotfiles repo

Most people do not have a dotfiles repo.

Aloha3 days ago

Most people do not even have a github.

Barrin923 days ago

it's not such a trivial thing even if you manage dotfiles because a lot of things still break between different environments, different operating systems, don't work with new releases, rely on some folder structure that changes, etc, it still requires fiddling.

Of course you can get even more involved and manage your dotfiles with ansible or something but the advantage of a tool like fish is that it's almost perfectly usable out of the box. More config files will always increase the chance for things breaking.

stevage3 days ago

Or in my case, my Dropbox.

peakaboo3 days ago

Just synk your dot files with your config and a readme for what you need to install. Getting my shell up on a new computer is very fast because of this approach.

ilaksh3 days ago

I stopped using patched fonts because of that. And I never felt like 24 bit terminal colors was necessary. You can just install fish and then the fisher plugin manager and then install a theme/prompt plugin.

stardenburden4 days ago

> my grandma was afraid of Linux, until I showed her that fish can autocomplete

Unknown user on discord

rgoulter4 days ago

Not restricted to fish shell, but I can further recommend as a prompt, and using fzf to search through command history.

pletnes4 days ago

Fzf can search virtually anything, since you can pipe output into/through it. It’s fantastic.

cbzehner4 days ago

I used Fish for several years before switching over to nushell a few weeks ago.

Nushell takes the ideas behind Fish even further by incorporating types other than strings and adding more built-in functionality that’s useful for your average command-line user.

I doubt I’ll go back but both are great! Highly recommend Fish and Nushell!

bobbylarrybobby4 days ago

Does nushell have the same kind of autocomplete? That’s what really keeps me using fish

pxc3 days ago

No, at least not out of the box, on Nushell 0.39.0.

Just tried it and there's no

  - out-of-order tab completion
  - preview with left/right arrow completion
  - case-insensitive/smart-case completion
dirkg3 days ago

I've gone down the rabbit hole with zshrc/bashrc customization, there are endless options and gists and pages and its a never ending rabbit hole.

In the end I realized a well configured toolkit is enough for 99.99% of people, and there are an endless number of those as well. I use zsh-quickstart-kit which is updated often and has good speed and amazing features. You get all the fish features AFAIK and more with no risk of scripts breaking and it was a 1min install.

For non devs who don't need to script I'd recommend fish and there are distros that default to it now.

Ultimatt3 days ago

Is no one going to comment on for *.pdf assumes no spaces in filenames for the BASH example to be correct, what about Fish?

pxc3 days ago

Fish doesn't do automatic word splitting on variable substitutions like bash does. Like ZSH (afaik), Fish doesn't require you to religiously surround every variable substitution in double quotation marks in case the contents have a space.

gnubison2 days ago

Globs work correctly in Bash (not “BASH”), even with spaces in filenames. Yes, you need to quote most variable substitutions[0], but globs are fine.

[0]: except in the RHS of a variable assignment or after the ‘case’ keyword

moonchild3 days ago

I do not know about fish, but it behaves correctly in zsh.

beermonster3 days ago

Is there anyone who can provide a simple summary for bash v zsh vs fish? Maybe I’m lazy but I’ve just stuck with bash for.. well since ever. Maybe it’s time to try something new but then if it ain’t broke… anyway would be interested in what things it does that I never knew I needed or things which just make life simpler/easier.

emilecantin3 days ago

Autocomplete is much better. For example, just typing "y" displays "arn start" in gray _after_ my cursor. I can then refine my command, or use right-arrow to accept the suggestion.

And this is just one example; fish is full of small usability touches like that.

If you need to run a bash script, `bash` still works

notfed3 days ago

Zsh does this too...but you have to configure zsh-autosuggestions.

The difference is that fish does this of the box with no configuration.

mikojan3 days ago

Of course you could always just do ctrl+r and cycle through and refine suggestions in bash

pxc3 days ago

The Fish suggestion the GP is describing isn't based on history, although it also autocompletes from commands in your history that way. That's part of the baseline autocompletion functionality of the whole shell, for all command names, local files, etc.

yourad_io3 days ago

Expanding on the local file competition: this is even context aware in some cases!

If you have four files starting with "A", one of which ends in .gz, typing "gunzip A" will suggest the .gz file.

Likewise for things like "git add" - as soon as you type an identifiable prefix to a changed file it will be suggested (eg if you only have one changed file in src/ it will suggest that when you type git add src)

vermaden3 days ago

If you would like to add all these FISH things to ZSH:

- highlighting and displaying last suggested command execution from history

- file/dir highlighting

- commands coloring and stuff

Then check 'UPDATE 1' from here:

I can not use FISH as it does not honor the POSIX syntax for loops and stuff and I often type 'for' and 'while' POSIX loops at command line so I use ZSH. Besides that FISH is really nice shell.


oakmad3 days ago

Anyone else read that as “The fish smell is amazing”?

zepearl3 days ago

I just did - and then I opened the article and kept reading...

> I’ve been lurking the fish smell for a couple of years now (and the nushell but it is another story for another time). Not so long ago, I decided to try it, and it’s simply… amazing.

..., had a "wtf"-moment (I thought that "nushell" was some kind of clam - my mothertongue is italian), then I read what followed so I started over paying more attention to what was written. I had to laugh :))

emersion3 days ago

> You can configure your shell using a web interface! Just run fish_config

As much as I like the fish shell, I really consider this an anti-feature. A TUI application to configure the shell would make much more sense. The terminal emulator is your platform, not the Web.

jvolkman3 days ago

The web configurator is a practical feature. I just tried it and it seems to work pretty well.

But you're in luck; looks like the next version will have everything also configurable via text:

pxc3 days ago

That's a CLI, not a TUI, but it is awesome that they've now made the CLI configuration worflow feature-complete!

octet13 days ago

Wondering how it would function after being passed through

dang3 days ago

Ok, let's do this. Past related threads:

Fish shell - - May 2021 (118 comments)

Fish Shell 3.2 - - March 2021 (128 comments)

Fish is not operational on a VT220 terminal (2015) - - Dec 2020 (113 comments)

New Features in the Fish Shell - - Sept 2020 (138 comments)

Dolphins learn from their peers to use empty shells to catch fish - - June 2020 (8 comments) (<-- just kidding)

Fish: A command line shell for the 90s - - Oct 2019 (83 comments)

Fish shell 3.0 - - Dec 2018 (220 comments)

Fish: A user-friendly command line shell for macOS, Linux, etc - - Dec 2017 (204 comments)

Fish (Shell) for a Week - - May 2017 (2 comments)

The fish shell is awesome - - April 2017 (7 comments)

Fish Shell Design Principles - - Feb 2016 (71 comments)

Fish shell 2.2 - - July 2015 (70 comments)

Fish shell - - May 2015 (182 comments)

FISH Shell: A dynamic shell - - Dec 2014 (3 comments)

Fish shell 2.1 - - Oct 2013 (151 comments)

fish shell - - Aug 2013 (75 comments)

Fish shell 2.0 - - May 2013 (175 comments)

Fish 2.0 shell beta - - April 2013 (56 comments)

Fish: Finally, a command line shell for the 90s - - June 2012 (146 comments)

Fish sucks (but your shell sucks more) - - Dec 2010 (60 comments)

Fish - The friendly interactive shell - - Sept 2009 (16 comments)

Fish Shell: A User-Friendly Shell or Like a Heavily Customized zsh - - Sept 2009 (8 comments)

xvf223 days ago

I seriously hope you have automation to pull these in! Thanks!

pxc3 days ago

Fish is wonderful! I'm glad it gets this repeated attention :D

craigkerstiens3 days ago

Strongly agreed here, it really just works. Sure you can get the same with zsh but the hours of my life I've spent tweaking and tuning zsh I'd happily give back because fish is good enough.

When we built our CLI for Crunchy Bridge it was a couple lines to add tab completion to the CLI when running in Fish (, love that when building such tooling giving a better end user experience was so simple.

lolski2 days ago

I've been a Fish user for 10 years!

One key thing I like from Fish is their command history feature, where you can use the up/down to move backward/forward the history.

I can't find a way to get this to work in ZSH I don't like having to CTRL+R for going backward (how do you even go forward, I can't remember :D)

pmarreck3 days ago

I'd rather have a more powerful shell that uses a functional style yet preserves many shell semantics we're all familiar with (like XS, , except maintained!) than an easier-to-use shell

DavideNL3 days ago

Can anyone recommend a "sane zsh defaults" config that I can download and just works with approximately the same features as fish?

(Without having to first learn/spend time about howto setup and configure plugins etc.)

garciasn3 days ago

More and more often, I am getting the following error:

Malware and Phishing

This site is blocked because it is a known security threat. Please contact your network administrator to gain access.

My assumption this is because I have Xfinity Business Class and it's blocking the site. But why would I be seeing this so often on a site linked from HN?

cpach3 days ago

It could be that the web filter in question has no info about the site, and therefore gives it an unfavourable score.

You might want to reach out to Xfinity support, or bypass their filter using a VPN or proxy.

vorticalbox3 days ago

maybe the .xyz domain?

dirkg3 days ago

Is fish usable for a web/nodejs developer working with the usual libs in the JS ecosystem such as React/Webpack as well as usual github projects?

By that I mean any scripts included in these projects. I have seen only a few scripts though.

vander_elst3 days ago

Vi mode was not good enough: first thing I do in a new shell is `set -o vi` and then try to do simple things: replace parts of words, copy/paste, search history. Fish in my experience was way worse than zsh and bash. Maybe things changed in the meantime?

xhevahir3 days ago

Can anyone explain why getting similar functionality in zsh is such a PITA? Every time I've tried to get smart-autocomplete history stuff working in it I've given up. Is it because the community is much more fragmented?

jrm43 days ago

Specific question for anyone who's gone from bash to fish (and maybe back) -- Does the "only splitting on newlines" mess you up? I've just been in bash so long that I feel like this will get me?

yourad_io3 days ago

You mean not splitting on spaces?

No, never, ever bit me.

faho3 days ago

Speaking with my fish developer hat on:

The only common case where we find that splitting on spaces is actually needed is pkg-config and related tools, because that prints flags to be passed to the compiler, and it does it with spaces so it looks nicer and copy-pasteable:

    $ pkg-config --libs gio-2.0
    -lgio-2.0 -lgobject-2.0 -lglib-2.0
(ideally, it would simply use newlines here, which bash et al would also split on)

Typically, the easy workaround is `string split " "`:

    > somecommand (pkg-config --libs gio-2.0 | string split " ")
Otherwise, this is quite rare in practice. Most unix tools already operate on a line-by-line basis, which allows them to be easily greppable.
kall3 days ago

I love fish. On any host, if I can just get fish running, I feel 100% at home. I don‘t need a single bit of customization on it.

err4nt3 days ago

I've been happy with Fish shell for years!

Yes, I could fiddle and twiddle with settings and configure a nicer shell, but Fish on its default settings on any OS just makes things smooth and easy!

londons_explore3 days ago

> You can configure your shell using a web interface!

Think about that for a while.

mro_name3 days ago

indeed, IMO the biggest downside – the (python-)heavy underpinnings.

jzer0cool3 days ago

Could someone explain more the video demo? It ran the python interpreter which disappeared, but I didn't quite catch the meaning of this.

aembleton3 days ago

It demonstrates the colour coding that fish gives to indicate if the command is valid (blue) or invalid (red). The video starts off with some other shell that doesn't do this and then runs the same commands again in fish.

slifin3 days ago

Fish is so good I think I'm using shellder and some other bits

But I just use it as a way to run commands, and I use dynamic languages to create scripts just not bash..

als03 days ago

> when you type something invalid it’s red, blue when not

Does anyone know how to do something like this with Bash?

uncomputation3 days ago

I really liked fish when I used it but unfortunately the non-compliance with other shells is just too much hassle given the feature set (autocomplete is cool but I always know when I have python3 vs python4), like not being able to just copy paste “export VAR=…” from the web like I have been my whole life.

jeppesen-io3 days ago

I wish I could use fish, but I can't leave the fancy auto complete of kubectl and git

EdwardDiego3 days ago

Fish does git autocomplete out of the box, and there's a Fisher plugin for kubectl autocomplete. Works great.

BeetleB3 days ago

xonsh is also worth a try. I've been using it for a few years now.

donio3 days ago

zsh has a short form for for loops too:

    for i in *.pdf; echo $i
Shorter than the fish version. Does that mean that it's a better shell then?
aquajet3 days ago

Is there a reason fish isn't posix compliant? From my experience (which is rudimentary tbf) there are only detriments due to the lack of sh scripts not working out of the box.

akho3 days ago

The reason is that POSIX shells are ugly and stupid, and fish syntax fixes (some of the) fundamental errors made in Bourne shell. Things like "${args[@]}" and other quoting and array-expansion syntaxes should not exist. Subshells are difficult and surprising. Weird keywords (esac) are weird.

Note how Plan 9 rc is also not POSIX.

Shell scripts have shebangs and work.

yourad_io3 days ago

> Shell scripts have shebangs and work.

Exactly this - I feel like it is a common misconception.

Even without shebang? `bash` -> done.

Writing a personal utility for myself? Unless it is dead simple I'll go with fish. It'll work with spaces in file names by default, I won't need `while < read`, etc.

Writing anything I need to distribute? sh or bash

I've been using fish for years and years and never once have I thought "oh man I wish this was POSIX" because POSIX was always 3 key strokes away if I really needed it: `sh<CR>` (which, I did not, unless I had to write a portable script and needed a repl)

peterhil3 days ago

Have you tried Oil Shell?

sigmonsays3 days ago

I've got way too many years of bash under my belt to invest in another shell. I gave oil shell a solid look and decided to not use it. While that may sound wrong, I dont see oil shell having enough features that are different enough to sway people over. I can't think of the saying here, but essentially its not disruptive in the shell space.

Also, it's just shell. By the time I end up with a complicated shell script, i've rewritten it in go, python, etc.

This is just my two cents, if I see more people talking about and using oil shell, I may reconsider.

opk3 days ago

I've not tried for a while but just getting that to even compile was a nightmare. It seemed to be a fork of the Python 2 code base. They've done the right thing by having a POSIX compatible layer but I completely disagree with their idea of what is wrong with the existing Bourne syntax and needs changing. An interactive shell needs to keep special characters to a minimum and stick to commands as the basic unit on which things are built. Zsh is already able to correct many of the worst elements of the Bourne syntax.

jordiburgos3 days ago

Not for me, it breaks the .sh scripts and have to be rewritten.

boudin3 days ago

You don't need to rewrite any script as long as your scripts have the correct shebang, those scripts works perfectly.

I would strongly not advise to make it the default shell though as this can lead to issues. The way I use it is to have bash as my main shell but my .bashrc starting fish if it's not started explicitly from bash: (it's a trick form arch wiki)

if [[ $(ps --no-header --pid=$PPID --format=cmd) != "fish" ]] then exec fish fi

I've been using fish for a long time with this setup and never encountered an issue.

pxc3 days ago

> I would strongly not advise to make it the default shell though as this can lead to issues.

I've heard this a lot, but I've been using Fish as my login shell for many years, and it's really not a problem

I think maybe some vim plugins call out to your $SHELL or something, but assume that it's bash-like? but I've never run into a serious issue with just using Fish as my login shell

boudin3 days ago

I don't remember the root cause as it was a while ago now, but in my case I couldn't login on a TTY because of that.

pxc3 days ago
2pEXgD0fZ5cF3 days ago

> it breaks the .sh scripts

What? No it doesn't. Shebang exists for a reason, and you should ALWAYS use it anyway, fish or not.

dimator3 days ago

It's not intended to run .sh scripts though. This is line saying python breaks .pl scripts.

ayushnix3 days ago

I can't think of a single reason why you'd need to rewrite your POSIX sh or bash scripts to be able to use Fish. The `#!/bin/sh` shebang is there for a reason.

binarysneaker3 days ago

+1. What's the point of a great shell, if I can't run the millions (!!) of existing scripts without refactoring them?! Zsh does the autocompletion just as well, so I'll stick with that.

thrwyoilarticle3 days ago

Here's how you run POSIX code inside a fish shell:

nojito4 days ago

Fish is good, but most shells pale in comparison to powershell unfortunately.

pxc3 days ago

PowerShell is definitely way more capable a scripting language, but it pales in comparison to Fish when it comes to speed, ease, and pleasantness of interactive use.

There's a new generation of shells on the rise which look up to both Fish and PowerShell as models of different virtues they want to embody. A lot of them are already usable, and some day a few of them will be killer apps for developers and sysadmins

nojito3 days ago

Nothing is speedier, easier, or more interactive than Get-Help in Powershell.

Using other shells is like living in the stone age. I don't know why people would do that to themselves.

pxc3 days ago

Get-Help is pretty good, but I don't like several things about it:

1. You have to go out of your way to fetch the full help pages on a given PowerShell installation (they're not stored locally by default).

2. Even after you fetch the full help, not all of it is actually included in the Get-Help output (IIRC examples), so you often need to use `Get-Help -Online`, which opens a separate application (browser) and that sucks

3. Inside the terminal, there's little to no special formatting or syntax highlighting, unlike what you get with a good `man` pager

4. Get-Help output (unlike `man` output as configured on most distros) is not paged by default.

`man` could be better, and I don't really vibe with `info`, but Get-Help isn't that great imo. The actual content of the help is quite good, and it's nice that it includes examples, but the same is true of most man pages.

laumars3 days ago

Loads of shells have an equivalent to Get-Help

tourist2d3 days ago

A one liner in bash is an essay in powershell

philipswood3 days ago

PowerShell: Maybe the learning curve is steep or something, but the times I've had to use it I disliked it.

I want to like it. It's goals and purposes seem to be in the right place, but....


revscat3 days ago

> Smart tab completion not only for the commands but for the arguments as well, and it apparently does that by parsing man pages.

And it does this every time you spawn a shell. So if you have set your login shell to fish, then every time you launch a shell it loads all the fish plugins like this one, and that slows it down. And you can’t turn it off, or couldn’t the last time I checked around a year ago. Insult to injury? The PR where this was requested was closed by the devs as “wontfix”.

This, and it’s lack of POSIX compatibility, made me switch back to zsh.

faho3 days ago

>And it does this every time you spawn a shell.

It does not. The completion generation is on first start and whenever you run `fish_update_completions`.

(note that the importance of man parsing is often quite overstated, it only gets you so far, all the advanced completion stuff is hand-written)

Source: I'm a fish dev.

pxc3 days ago

On NixOS, we generate the completions on behalf of users at install time, so they never have to see a slow startup at all. Fish makes it easy to do! Thanks :D

pxc3 days ago

> So if you have set your login shell to fish, then every time you launch a shell it loads all the fish plugins like this one, and that slows it down

Fish completions and functions are lazy-loaded, so this doesn't happen unless you write your config to force it to happen.

Fish also provides you with functions you can use to check whether a shell instance is a login shell, is interactive, or is just being invoked as (part of a) script. If you do have some heavy-duty stuff you want to run on startup for your login shell or your interactive shells, you can do that selectively and keep Fish startup for other purposes fast.

ilaksh3 days ago

I have been using fish for years. I don't have those issues because I just leave the default as bash and run the fish command manually when I log in. Then if I have some incompatibility (pretty rare) I can just type 'exit'.

iamevn3 days ago

do you have fish_update_completions somewhere that runs when you start a shell? maybe ~/.config/fish/

pvaldes4 days ago

> fish is not POSIX compliant, don’t expect your previous scripts to work at all

Extend, embrace, extinguish?...

fiedzia4 days ago

All your existing scripts will continue to work just fine. #!/usr/bin/bash

unixhero4 days ago

Yeah, I mean they have the hashbang.

junon4 days ago

Fish is not a company, either. Also, competing standards is not an example of EEE.

purerandomness4 days ago

fish never claimed to be POSIX compliant to begin with, so no. There never was an 'extend' step.

pvaldes4 days ago

But seems to want us to replace the old reliable shell with it (Or this is what I understand). I see a lot of people reinventing the wheel in Linux and trying to appeal the new users. What you have in the end is normally worse than the standard ones. Is just dissecting Linux in a lot of smaller particles and smaller rooms.

So thanks, but not thanks. Not to me.

Wouldn't be much more practical to use all of those talent and ideas to help to improve the extant bash shell instead?

woodruffw4 days ago

There are lots of "old reliable shells" that are POSIX incompatible. (t)csh[1] is the first family that comes to mind.

The EEE analogy is more applicable to GNU Bash anyways: it extended the POSIX sh baseline with a bunch of GNUisms that a lot of "POSIX" sh scripts now unintentionally use.


adrian_b3 days ago
oblio3 days ago

> Wouldn't be much more practical to use all of those talent and ideas to help to improve the extant bash shell instead?

Yeah, good luck with that.

It's a garbage pile of code that creates an interpreter with piles upon piles of undefined behavior that random scripts out there in the world rely on.

I don't even think it was a working CI setup.

I'd be super glad to be proven wrong, maybe things have changed in the meantime.

Shared4044 days ago

Sometimes to improve on old ideas or develop new ones you need to start over.

See plan9, RedoxOS, TempleOS, Gemini, etc.

None of these are currently in a position to gain dominance, but they all explore a space that couldn't be explored starting with a prior code base.