num_colors() incorrectly reports 256 in RStudio Terminal

[rossellhayes]

Even when setting forget = TRUE, num_colors() incorrectly reports 256 in the RStudio Terminal. Calling show_ansi_colors() reveals that the true number is much lower.

[gaborcsardi]

What's your OS? What's your RStudio version? What's crayon's version?

What's the output of

crayon:::detect_tty_colors()

What's the output of

system("tput colors 2>/dev/null", intern = TRUE)

[rossellhayes]

Sorry, that was really bad GitHub etiquette on my part.

I'm running RStudio 1.4.1106 on Windows 10 build 19042. This is R 4.0.5 and crayon 1.4.1.

Both crayon:::detect_tty_colors() and system("tput colors 2>/dev/null", intern = TRUE) return 256 in RStudio's terminal.

I ran through num_ansi_colors() with debugging and none of the if statements were true. This meant it went to the last condition, running detect_tty_colors(). In detect_tty_colors(), the condition os_type() == "windows" && win10_build() >= 16257 was true, which returns a hardcoded 256L.

Here's the session info:

Session info

# - Session info ---------------------------------------------------------------
#  setting  value
#  version  R version 4.0.5 (2021-03-31)
#  os       Windows 10 x64
#  system   x86_64, mingw32
#  ui       RTerm
#  language (EN)
#  collate  English_United States.1252
#  ctype    English_United States.1252
#  tz       America/Los_Angeles
#  date     2021-04-24
# 
# - Packages -------------------------------------------------------------------
#  package     * version date       lib source
#  cli           2.4.0   2021-04-05 [1] standard (@2.4.0)
#  crayon      * 1.4.1   2021-02-08 [1] CRAN (R 4.0.5)
#  glue          1.4.2   2020-08-27 [1] CRAN (R 4.0.3)
#  rlang         0.4.10  2020-12-30 [1] CRAN (R 4.0.5)
#  sessioninfo   1.1.1   2018-11-05 [1] CRAN (R 4.0.0)
#  withr         2.4.1   2021-01-26 [1] standard (@2.4.1)
# 
# [1] C:/Users/Alex/Documents/R/win-library/4.0
# [2] C:/Program Files/R/R-4.0.5/library

[gaborcsardi]

What's your shell in the terminal? CMD or PowerShell?