If you use zsh, there is zsh syntax highlighting plugin. For bash, a cursory search gave me ble.sh which looks interesting. And as other threads have mentioned, fish shell has this built in, but beware fish shell syntax works drastically differently from other POSIX shells
beware fish shell syntax works drastically differently from other POSIX shells
Come on, that’s scaremongering :)
On interactive, day-to-day use, fish syntax is basically the same as bash or any other shell: you type your commands, hit enter and the command is run. Only when it comes to scripting (or writing complex one-liners, or copy-pasting stuff from the web) are there appreciable differences. In those cases, until one is accustomed to fish, running the command/script in bash is still an option.
Let me be 100% clear: yes, fish will complain if a wildcard doesn’t expand to anything, and there are other minor things that may impact typical interactive use. I’m just saying there is basically zero learning curve if you want to try fish and that you can just fire up bash if you hit a wall in a moment when you can’t afford to investigate because you need stuff done.
If I had to say, the most hassle with fish is that people assume you are running POSIX shell and so you have to know how to adapt instructions to your shell. For example, someone may say “add expor SOME_VAR=some_value to your .bashrc” and you need to be able to translate that to fish. Also, there is very specific software (in my system, it’s just sdkman, an utility that manages which java development tools are installed/available in a shell session) that only works in POSIX shells and needs some adapter for fish.
Having to adapt to shells is exactly why I don’t like to use radical shells like fish or nushell. I don’t want to feel too comfortable with them, because if I do, I would probably regret it when I’m stuck in situations that doesn’t have the correct shell. SSH into a new server or Raspberry Pi that has DNS issue, for example, which actually happened to me more than once. The DNS is already troublesome, and I don’t want shell unfamiliarity to become another headache
Well, it’s not like by learning fish you’ll automatically forget bash :) but I do agree that you should learn bash first, then plain sh and only after those go explore other shells.
I love how “radical shells” sounds! :)
I’ll be honest, I use bash and the only benefit using ble.sh has over zsh, is that vi(m) mode is better than zsh. For example, more complex commands like di" (delete inside ") don’t work in zsh, but work in bash with ble.sh. Also, I found ble.sh far more complicated and took me a while to get it configured. Even now, some completions, especially tab completion, isn’t as good in bash as in zsh. In fact, the only issues I had with zsh compared to ble.sh were vi mode related. More specifically, the aforementioned lack of advanced vi(m) mode commands, and the limited support for showing the current vi mode in the prompt, for example for Visual mode (Normal and Insert mode seem to be the only ones to work).
So if you need advanced vi(m) mode, get ble.sh configured. Otherwise, go for zsh.
What you are looking for is called Syntax Highlight. Are you asking this for the terminal? I think this is a property of the shell. Fish has it builtin and for ZSH, there is a plugin: https://github.com/zsh-users/zsh-syntax-highlighting I don’t know if its possible with Bash.
Tried it out and it works! Thanks!
Yeah, I used to use that before. But its slower for me. So now I use fish for interactions
Yeah, it’s slow. I use it currently (because of better vi mode support) but plan to switch back to zsh.
Yes, I am looking for a syntax highlighter for the terminal. The one I use is called Kitty.
It would make sense for the terminal to handle syntax highlighting since that would match how editors work. But the convention is that the shell handles highlighting, not the terminal. You can check which shell you are running with the command,
$ echo $SHELLIt’s done that way because the shell is a running program that is capable of telling the terminal which colors to show (by mixing color escape sequences into text). Compare that to code in an editor which is text, not a running program so the only option is for the editor to handle highlighting[1]. Editors need syntax files to configure highlighting for all the different programming languages, while terminals don’t need this because the shell tells them what colors to show.
[1] setting aside the “semantic highlighting” LSP capability - that was invented long after syntax highlighting conventions were established
Fish shell
You can change the used shell in the configs. At least for Alacritty, when I used it (dont care, it was still kinda broken, I just use Konsole)
Interesting, I never heard of setting your shell in the emulator config. I just used ‘chsh’ once when I setup the install.
Yeah please dont use chsh.
Zsh may work, dash (which is a faster, smaller reimplementation of bash) may work.
But fish absolutely doesnt.
Just because you want to have a nice writing experience, that doesnt mean your whole OS needs a different shell.
I will experiment with dash though. Ubuntu uses it as the root shell, so it is really well tested.
What do you mean by won’t work? chsh is not changing the shell of the entire OS, it’s changing your users login shell. Unless you’ve done something to make your login break without bash, this is completely fine. Using chsh is even how the Fish docs recommend setting it as your default.
What Ubuntu did isnt about login shells, they replaced /bin/sh with dash, meaning any scripts that try to use sh will instead use dash.
Thanks for the heads up.
please dont use chsh
doesnt mean your whole OS needs a different shell
chsh just changes the shell when you log in to a shell. all the other shells are still available and usable. any script starting tieh
will still run with bash, even if you’re using zsh or fish.Yes bash scripts still work, but I heard there may be other things that randomly break.
Many things use
for example, which often is a link to bash, but may not work anymore.chsh does not modify /bin/sh
Maybe you’re thinking of a certain video from a certain YouTuber who linked /bin/sh to fish?
Haha no didnt think of that? Hm, I dont know why it would be an issue then. POSIX compliant shells should be no problem, but I wouldnt do it for fish
It will never matter what your login shell, unless you have bash specific scripts in your login.
chsh -s /bin/fish $(whoami)is fine.
adjust the knobs on your terminal until the shade of green or yellow is pleasing
Fish
I suggest trying this one for Zsh, over the more common one: https://github.com/zdharma-continuum/fast-syntax-highlighting
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zsh-syntax-highlighting
There’s also a fork called fast-syntax-highlighting, I use it.
Powershell does this on Windows. May also work on Linux?
Yes: https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-linux
Should you choose to install it, it will bring the total of people running powershell on linux to one :)
(I’m kidding, of course, more or less)
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Never used powershell (thanks heavens, I’ve not touched windows since windows 7). Is it similar to nushell?
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Yes! Zsh-syntax-highlighting is a starting point to look at. You can also use fish shell
