fix(runtime): disable console color for non tty stdout (#13782)

8 files changed, 32 insertions, 2 deletions

diff --git a/cli/main.rs b/cli/main.rs
index d1f521a81..1bbc839e8 100644
--- a/cli/main.rs
+++ b/cli/main.rs
@@ -156,6 +156,7 @@ fn create_web_worker_callback(ps: ProcState) -> Arc<CreateWebWorkerCb> {
         enable_testing_features: ps.flags.enable_testing_features,
         location: Some(args.main_module.clone()),
         no_color: !colors::use_color(),
+        is_tty: colors::is_tty(),
         runtime_version: version::deno(),
         ts_version: version::TYPESCRIPT.to_string(),
         unstable: ps.flags.unstable,
@@ -256,6 +257,7 @@ pub fn create_main_worker(
       enable_testing_features: ps.flags.enable_testing_features,
       location: ps.flags.location.clone(),
       no_color: !colors::use_color(),
+      is_tty: colors::is_tty(),
       runtime_version: version::deno(),
       ts_version: version::TYPESCRIPT.to_string(),
       unstable: ps.flags.unstable,
diff --git a/cli/standalone.rs b/cli/standalone.rs
index bd7bef8ac..bea29f263 100644
--- a/cli/standalone.rs
+++ b/cli/standalone.rs
@@ -276,6 +276,7 @@ pub async fn run(
       enable_testing_features: false,
       location: metadata.location,
       no_color: !colors::use_color(),
+      is_tty: colors::is_tty(),
       runtime_version: version::deno(),
       ts_version: version::TYPESCRIPT.to_string(),
       unstable: metadata.unstable,
diff --git a/cli/tests/unit/tty_color_test.ts b/cli/tests/unit/tty_color_test.ts
new file mode 100644
index 000000000..d64c278bf
--- /dev/null
+++ b/cli/tests/unit/tty_color_test.ts
@@ -0,0 +1,14 @@
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+import { assertEquals } from "./test_util.ts";
+
+// Note tests for Deno.setRaw is in integration tests.
+
+Deno.test({ permissions: { run: true } }, async function noColorIfNotTty() {
+  const p = Deno.run({
+    cmd: [Deno.execPath(), "eval", "console.log(1)"],
+    stdout: "piped",
+  });
+  const output = new TextDecoder().decode(await p.output());
+  assertEquals(output, "1\n");
+  p.close();
+});
diff --git a/runtime/colors.rs b/runtime/colors.rs
index f2dbf22bd..196e522e4 100644
--- a/runtime/colors.rs
+++ b/runtime/colors.rs
@@ -1,5 +1,6 @@
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
 
+use atty;
 use once_cell::sync::Lazy;
 use std::fmt;
 use std::io::Write;
@@ -12,6 +13,12 @@ use termcolor::{BufferWriter, ColorChoice};
 static NO_COLOR: Lazy<bool> =
   Lazy::new(|| std::env::var_os("NO_COLOR").is_some());
 
+static IS_TTY: Lazy<bool> = Lazy::new(|| atty::is(atty::Stream::Stdout));
+
+pub fn is_tty() -> bool {
+  *IS_TTY
+}
+
 pub fn use_color() -> bool {
   !(*NO_COLOR)
 }
diff --git a/runtime/examples/hello_runtime.rs b/runtime/examples/hello_runtime.rs
index e74920c34..0a0d6fe23 100644
--- a/runtime/examples/hello_runtime.rs
+++ b/runtime/examples/hello_runtime.rs
@@ -35,6 +35,7 @@ async fn main() -> Result<(), AnyError> {
       enable_testing_features: false,
       location: None,
       no_color: false,
+      is_tty: false,
       runtime_version: "x".to_string(),
       ts_version: "x".to_string(),
       unstable: false,
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index fb5de250c..a0f059603 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -574,13 +574,14 @@ delete Object.prototype.__proto__;
       args,
       location: locationHref,
       noColor,
+      isTty,
       pid,
       ppid,
       unstableFlag,
       cpuCount,
     } = runtimeOptions;
 
-    colors.setNoColor(noColor);
+    colors.setNoColor(noColor || !isTty);
     if (locationHref != null) {
       location.setLocationHref(locationHref);
     }
@@ -666,12 +667,13 @@ delete Object.prototype.__proto__;
       unstableFlag,
       pid,
       noColor,
+      isTty,
       args,
       location: locationHref,
       cpuCount,
     } = runtimeOptions;
 
-    colors.setNoColor(noColor);
+    colors.setNoColor(noColor || !isTty);
     location.setLocationHref(locationHref);
     numCpus = cpuCount;
     registerErrors();
diff --git a/runtime/worker.rs b/runtime/worker.rs
index 1e31b84dc..b3f7b2350 100644
--- a/runtime/worker.rs
+++ b/runtime/worker.rs
@@ -360,6 +360,7 @@ mod tests {
         enable_testing_features: false,
         location: None,
         no_color: true,
+        is_tty: false,
         runtime_version: "x".to_string(),
         ts_version: "x".to_string(),
         unstable: false,
diff --git a/runtime/worker_bootstrap.rs b/runtime/worker_bootstrap.rs
index 9bd519d73..05bde731f 100644
--- a/runtime/worker_bootstrap.rs
+++ b/runtime/worker_bootstrap.rs
@@ -15,6 +15,7 @@ pub struct BootstrapOptions {
   pub location: Option<ModuleSpecifier>,
   /// Sets `Deno.noColor` in JS runtime.
   pub no_color: bool,
+  pub is_tty: bool,
   /// Sets `Deno.version.deno` in JS runtime.
   pub runtime_version: String,
   /// Sets `Deno.version.typescript` in JS runtime.
@@ -33,6 +34,7 @@ impl BootstrapOptions {
       "denoVersion": self.runtime_version,
       "location": self.location,
       "noColor": self.no_color,
+      "isTty": self.is_tty,
       "tsVersion": self.ts_version,
       "unstableFlag": self.unstable,
       // Web worker only