This implements support for NO_COLOR in test suites using AT_COLOR_TESTS to enable colour by default. NO_COLOR is an informal standard[1] way for users to express their preference to not use colours by default.
If NO_COLOR is set in the environment to anything other than the empty string, the default should be "no colour" (but the command-line --color option is expected to work as usual). [1] http://no-color.org * lib/autotest/general.m4 (AT_INIT): Respect user NO_COLOR setting to restrict enabling of ANSI colours by default. --- lib/autotest/general.m4 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/autotest/general.m4 b/lib/autotest/general.m4 index 6b4c3ae5..b5388da4 100644 --- a/lib/autotest/general.m4 +++ b/lib/autotest/general.m4 @@ -446,7 +446,9 @@ m4_define([_AT_FINISH], m4_divert_text([DEFAULTS], [ # Whether to enable colored test results. -at_color=m4_ifdef([AT_color], [AT_color], [no]) +m4_ifdef([AT_color], + [AS_CASE([$NO_COLOR], [''], [at_color=auto], [at_color=no])], + [at_color=no]) # As many question marks as there are digits in the last test group number. # Used to normalize the test group numbers so that 'ls' lists them in # numerical order. -- 2.45.2
