From ef62452363de75240b21299e9f80b4851433faaa Mon Sep 17 00:00:00 2001
From: Jonathan Marler <johnnymarler@gmail.com>
Date: Tue, 22 Oct 2019 23:21:16 -0600
Subject: [PATCH] Handle TERM=dumb for stdout/stderr

---
 lib/std/fs/file.zig | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/std/fs/file.zig b/lib/std/fs/file.zig
index a9212d69d4..44992ff47d 100644
--- a/lib/std/fs/file.zig
+++ b/lib/std/fs/file.zig
@@ -177,7 +177,17 @@ pub const File = struct {
         if (windows.is_the_target) {
             return os.isCygwinPty(self.handle);
         }
-        return self.isTty();
+        if (self.isTty()) {
+            if (self.handle == os.STDOUT_FILENO or self.handle == os.STDERR_FILENO) {
+                // Use getenvC to workaround https://github.com/ziglang/zig/issues/3511
+                if (os.getenvC(c"TERM")) |term| {
+                    if (std.mem.eql(u8, term, "dumb"))
+                        return false;
+                }
+            }
+            return true;
+        }
+        return false;
     }
 
     pub const SeekError = os.SeekError;