update `gh help formatting` with example to print issue label colors i.e. in `gh issue list`

[jatcs]

Describe the feature or problem you’d like to solve

I haven't been able to use the --template functions of autocolor or color to colorize a template output.

Particularly, I want to be able to modify the table output of gh issue list and keep the issue labels colorized, without having to manually map hex colors to ANSI strings, particularly because the hex color is already stored in the JSON output i.e. gh issue list --json labels

Example: gh issue list

If I wanted to remove the updated field, I might try:

gh issue list --json number,title,labels --template '{{range .}}{{printf "#%.0f %s" .number .title}}{{if .labels}} {{range $i, $label := .labels}}{{if $i}}, {{end}}{{printf "%s" $label.name}}{{end}}{{end}}{{"\n"}}{{end}}'

Naturally since color and autocolor only support ANSI strings like 'Red', 'Green', etc, adding | color $label.color fails to print the label colors.

Proposed solution

• Add an example to gh help formatting that shows how a user can create a template to print issue labels with their corresponding colors.

  • Here is an example where hexcolor could be replaced with syntax to handle applying the label color.

gh issue list --json labels --template \
  '{{range .}}{{printf "%s" | hexcolor .color}}{{end}}'

• This would help users apply their own filters i.e. using --jq, -S, while still viewing an output similar to gh issue list.

Additional context

Here is some information I found about how to apply colors in zsh, but I haven't been able to figure out how to apply this so that I can color my label output.

• https://unix.stackexchange.com/questions/665370/confused-on-colors-xterm-vs-zsh-how-to-set-xterm-without-breaking-zsh-colors