Improve emoji support detection (#7775)

Co-authored-by: Agnieszka Gawrys <gawrysagnes@gmail.com>
parcel-bundler · Mar 11, 2022 · 8442c62 · 8442c62
1 parent 083e530
commit 8442c62
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Showing 2 changed files with 36 additions and 4 deletions.
diff --git a/packages/reporters/cli/src/emoji.js b/packages/reporters/cli/src/emoji.js
@@ -1,7 +1,23 @@
 // @flow strict-local
 
-const supportsEmoji =
-  process.platform !== 'win32' || process.env.TERM === 'xterm-256color';
+// From https://github.com/sindresorhus/is-unicode-supported/blob/8f123916d5c25a87c4f966dcc248b7ca5df2b4ca/index.js
+// This package is ESM-only so it has to be vendored
+function isUnicodeSupported() {
+  if (process.platform !== 'win32') {
+    return process.env.TERM !== 'linux'; // Linux console (kernel)
+  }
+
+  return (
+    Boolean(process.env.CI) ||
+    Boolean(process.env.WT_SESSION) || // Windows Terminal
+    process.env.ConEmuTask === '{cmd::Cmder}' || // ConEmu and cmder
+    process.env.TERM_PROGRAM === 'vscode' ||
+    process.env.TERM === 'xterm-256color' ||
+    process.env.TERM === 'alacritty'
+  );
+}
+
+const supportsEmoji = isUnicodeSupported();
 
 // Fallback symbols for Windows from https://en.wikipedia.org/wiki/Code_page_437
 export const progress: string = supportsEmoji ? '⏳' : '∞';

diff --git a/packages/utils/create-react-app/src/emoji.js b/packages/utils/create-react-app/src/emoji.js
@@ -1,7 +1,23 @@
 // @flow strict-local
 
-const supportsEmoji =
-  process.platform !== 'win32' || process.env.TERM === 'xterm-256color';
+// From https://github.com/sindresorhus/is-unicode-supported/blob/8f123916d5c25a87c4f966dcc248b7ca5df2b4ca/index.js
+// This package is ESM-only so it has to be vendored
+function isUnicodeSupported() {
+  if (process.platform !== 'win32') {
+    return process.env.TERM !== 'linux'; // Linux console (kernel)
+  }
+
+  return (
+    Boolean(process.env.CI) ||
+    Boolean(process.env.WT_SESSION) || // Windows Terminal
+    process.env.ConEmuTask === '{cmd::Cmder}' || // ConEmu and cmder
+    process.env.TERM_PROGRAM === 'vscode' ||
+    process.env.TERM === 'xterm-256color' ||
+    process.env.TERM === 'alacritty'
+  );
+}
+
+const supportsEmoji = isUnicodeSupported();
 
 // Fallback symbols for Windows from https://en.wikipedia.org/wiki/Code_page_437
 export const progress: string = supportsEmoji ? '⏳' : '∞';