From: Eric Sunshine <sunshine@xxxxxxxxxxxxxx> Although the macOS Terminal.app is "xterm"-compatible, its corresponding "terminfo" entries -- such as "xterm", "xterm-256color", and "xterm-new"[1] -- neglect to mention capabilities which Terminal.app actually supports (such as "dim text"). This oversight on Apple's part ends up penalizing users of "good citizen" console programs which consult "terminfo" to tailor their output based upon reported terminal capabilities (as opposed to programs which assume that the terminal supports ANSI codes). The same problem is present in other Apple "terminfo" entries, such as "nsterm"[2], with which macOS Terminal.app may be configured. Sidestep this Apple problem by imbuing get_colors() with specific knowledge of capabilities common to "xterm" and "nsterm", rather than trusting "terminfo" to report them correctly. Although hard-coding such knowledge is ugly, "xterm" support is nearly ubiquitous these days, and Git itself sets precedence by assuming support for ANSI color codes. For other terminal types, fall back to querying "terminfo" via `tput` as usual. FOOTNOTES [1] iTerm2 FAQ suggests "xterm-new": https://iterm2.com/faq.html [2] Neovim documentation recommends terminal type "nsterm" with Terminal.app: https://neovim.io/doc/user/term.html#terminfo Signed-off-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx> --- t/chainlint.pl | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/t/chainlint.pl b/t/chainlint.pl index 7972c5bbe6f..0ee5cc36437 100755 --- a/t/chainlint.pl +++ b/t/chainlint.pl @@ -653,21 +653,32 @@ my @NOCOLORS = (bold => '', rev => '', reset => '', blue => '', green => '', red my %COLORS = (); sub get_colors { return \%COLORS if %COLORS; - if (exists($ENV{NO_COLOR}) || - system("tput sgr0 >/dev/null 2>&1") != 0 || - system("tput bold >/dev/null 2>&1") != 0 || - system("tput rev >/dev/null 2>&1") != 0 || - system("tput setaf 1 >/dev/null 2>&1") != 0) { + if (exists($ENV{NO_COLOR})) { %COLORS = @NOCOLORS; return \%COLORS; } - %COLORS = (bold => `tput bold`, - rev => `tput rev`, - reset => `tput sgr0`, - blue => `tput setaf 4`, - green => `tput setaf 2`, - red => `tput setaf 1`); - chomp(%COLORS); + if ($ENV{TERM} =~ /xterm|xterm-\d+color|xterm-new|xterm-direct|nsterm|nsterm-\d+color|nsterm-direct/) { + %COLORS = (bold => "\e[1m", + rev => "\e[7m", + reset => "\e[0m", + blue => "\e[34m", + green => "\e[32m", + red => "\e[31m"); + return \%COLORS; + } + if (system("tput sgr0 >/dev/null 2>&1") == 0 && + system("tput bold >/dev/null 2>&1") == 0 && + system("tput rev >/dev/null 2>&1") == 0 && + system("tput setaf 1 >/dev/null 2>&1") == 0) { + %COLORS = (bold => `tput bold`, + rev => `tput rev`, + reset => `tput sgr0`, + blue => `tput setaf 4`, + green => `tput setaf 2`, + red => `tput setaf 1`); + return \%COLORS; + } + %COLORS = @NOCOLORS; return \%COLORS; } -- gitgitgadget
