Custom syntax highlight on pattern/regex?

[johnalotoski]

Is there a way to syntax highlight a user defined pattern in a special way?

Example: Custom highlight regex ^rm -rf.* with bright red background, white foreground in ble.sh?

Similar example in zsh, link

[akinomyoga]

I'm sorry for my late reply. I missed your post since I was busy that week.

There is currently no easy interface to configure highlighting patterns. In principle, you could implement a custom layer as shell functions (ble/highlight/layer:<LAYER>/* with <LAYER> being the name of the new layer). The details of implementing a layer is described in a code comment, but it's written in Japanese (so please use machine translations if you are really interested). I think the implementation of the region layer can be referenced as an example.

Maybe, when I have time, I can implement a new layer that offers a simple interface for configuring highlighting by patterns.

[johnalotoski]

I'm sorry for my late reply. I missed your post since I was busy that week.
There is currently no easy interface to configure highlighting patterns. In principle, you could implement a custom layer as shell functions (ble/highlight/layer:/* with being the name of the new layer). The details of implementing a layer is described in a code comment, but it's written in Japanese (so please use machine translations if you are really interested). I think the implementation of the region layer can be referenced as an example.

Thank you for the information, I'll look into that.

Maybe, when I have time, I can implement a new layer that offers a simple interface for configuring highlighting by patterns.

That would be awesome!

[akinomyoga]

Maybe, when I have time, I can implement a new layer that offers a simple interface for configuring highlighting by patterns.

I have implemented a new layer class in contrib/layer/pattern.bash. You can update ble.sh by running ble-update in a ble session, and e.g. write the following settings in blerc:

ble-import layer/pattern

# Create a layer with the name "pattern1".
# The patterns in this layer are by default interpreted as regular expressions.
ble/highlight/layer:{pattern}/declare pattern1
ble/highlight/layer:{pattern}/register pattern1 'rm -rf [^;&|]*' 'fg=white,bold,bg=red'    # add a pattern in a regular expression
ble/array#insert-after _ble_highlight_layer_list syntax pattern1    # register the layer "pattern1" to the layer list.

# Create another layer with the name "pattern2".
# The argument "glob" specifies that the patterns in this layer should be treated as glob patterns.
ble/highlight/layer:{pattern}/declare pattern2 glob
ble/highlight/layer:{pattern}/register pattern2 "$USER" 'fg=blue,bold'
ble/highlight/layer:{pattern}/register pattern2 "$HOSTNAME" 'fg=green,bold'    # one can add multiple patterns in a pattern layer
ble/highlight/layer:{pattern}/register pattern2 '[0-9]+' 'bg=216,fg=black'
ble/array#insert-after _ble_highlight_layer_list pattern1 pattern2

Detailed descriptions on the functions can be found in the beginning comment of contrib/layer/pattern.bash.

[johnalotoski]

Awesome, thank you very much!
This is great!