has16m is false but terminal supports Truecolor about supports-color HOT 16 CLOSED

@Delta456 https://blog.sindresorhus.com/issue-bumping-e3b9740e2a0

from supports-color.

Right now, no. Terminals don't expose anything that identifies them having 16m colors, unfortunately.

@sindresorhus we should make more progress on that.

from supports-color.

We could hard-code it if gnome-terminal exposes its name somehow.

@bokub What's the output of running echo $TERM_PROGRAM?

from supports-color.

$TERM_PROGRAM is empty, $TERM is xterm-256color, unfortunately.

However, the command ps -p$PPID returns the following:

  PID TTY          TIME CMD
 3798 ?        00:00:13 gnome-terminal-

You could check if the result of the command contains gnome-terminal.

What if I always force level 3 in my code ? Can it impact users who only support 256 colors ?

Were you answering this question when you said 'Right now, no' @Qix- ? Is it a good idea or not to force level 3 ?

from supports-color.

What if I always force level 3 in my code ? Can it impact users who only support 256 colors ?

Yeah don't do that. It'll cause a lot of issues for users that don't have the new codes - the best case is that they won't see any color, worst case is they get output [38;2;185;2;217mlike this.

from supports-color.

However, the command ps -p$PPID returns the following:

We can't spawn a child process. That's too expensive.

from supports-color.

What does echo $VTE_VERSION and echo $COLORTERM (this one doesn't work in later versions of gnome-terminal) give you?

from supports-color.

$VTE_VERSION is 4205
$COLORTERM is undefined

from supports-color.

@kevva I can't immediately find any docs on VTE_VERSION - what is it?

from supports-color.

It's set by gnome-terminal and shows the vte version. We can probably use that flag to detect gnome-terminal.

from supports-color.

Is there a corresponding version we can use to more accurately detect the level of support? Or just the existence of the variable?

from supports-color.

Just the existence I think. I'm not aware of any other program setting it.

from supports-color.

@bokub Can you open an issue on the gnome-terminal issue tracker asking them to implement $TERM_PROGRAM and $TERM_PROGRAM_VERSION?

from supports-color.

Is this issue fixed now?

from supports-color.

I am sorry if I bumped it but I think we can use node-cpp for the system api to detect it.

from supports-color.

There's no way we're bringing in a native module to supports-color, sorry.

Unless the terminal emulator exposes a way for us to detect the truecolor support (since traditional ways such as terminfo have not evolved to keep up) there's nothing actionable we can do.

We've not heard back in over a year so I'm going to close this since there's nothing (currently) actionable.

from supports-color.