[3.6] backport #6503 (status line fix)#6556
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We want to enable the status line if and only if stderr is a tty. ANSI color usage was tweaked in 3.6.0 with ocaml#6340 to allow users to force colors. As status line activation actually depended on whether ANSI colors were enabled or not, this change had the side effect to always enable the status line even when ANSI colors were requested for something that's not a tty. Fix this by exposing a simple lazy wrapper of Unix.isatty to use instead of Ansi_color.stderr_supports_color. Signed-off-by: Antonin Décimo <antonin@tarides.com>
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We want to enable the status line if and only if stderr is a tty. ANSI
color usage was tweaked in 3.6.0 with #6340 to allow users to force
colors. As status line activation actually depended on whether ANSI
colors were enabled or not, this change had the side effect to always
enable the status line even when ANSI colors were requested for
something that's not a tty.
Fix this by exposing a simple lazy wrapper of Unix.isatty to use
instead of Ansi_color.stderr_supports_color.
Signed-off-by: Antonin Décimo antonin@tarides.com