support $NO_COLOR

http://no-color.org/
leahneukirchen · Jan 29, 2018 · 8f0ac7c · 8f0ac7c
1 parent a5dcf17
commit 8f0ac7c
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diff --git a/lr.1 b/lr.1
@@ -115,6 +115,9 @@ Don't enter directories.
 .It Fl G
 Colorize output to TTY.
 Use twice to force colorized output.
+If the environment variable
+.Ev NO_COLOR
+is set, colors are never used.
 .It Fl X
 Output OSC 8 hyperlinks to TTY.
 Use twice to force hyperlinks.

diff --git a/lr.c b/lr.c
@@ -2468,6 +2468,8 @@ main(int argc, char *argv[])
 		if (Xflag == 1)
 			Xflag = 0;
 	}
+	if (getenv("NO_COLOR"))
+		Gflag = 0;
 
 	analyze_format();
 	if (Uflag) {