term_app_color_depth

 term_app_color_depth() -> [status, msg, payload, meta]

Try to determine the suitable color depth to use.

Will first check COLORTERM environment variable to see if its value is "truecolor"; if yes then depth is 2**24 (24 bit).

Then will check COLOR_DEPTH environment variable and use that if defined.

Otherwise will check COLOR environment variable and use that as color depth if defined and the value looks like color depth (e.g. 256 or "24bit").

Otherwise will try to detect terminal emulation software and use the highest supported color depth of that terminal software.

Otherwise will default to 16.

This function is not exported.

No arguments.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

term_app_should_use_color

 term_app_should_use_color() -> [status, msg, payload, meta]

Try to determine whether colors should be used. First will check NO_COLOR environment variable and return false if it exists. Otherwise will check the COLOR environment variable and use it if it's defined. Otherwise will check the COLOR_DEPTH environment variable and if defined will use color when color depth is > 0. Otherwise will check if script is running interactively and when it is then will use color. Otherwise will not use color.

This function is not exported.

No arguments.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

COLOR

COLOR_DEPTH

COLORTERM

NO_COLOR