feat(color-support): Making exception on isTTY for PM2 process manager.

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Change log
 
+## 3.1.0 (2024-04-10)
+
+- feat: add detection of color support when using PM2 process manager
+
 ## 3.0.3 (2024-04-09)
 
 - chore: add rollup-plugin-cleanup to remove comments from d.ts file for dist, that save yet 3 KB

src/color-support.js

@@ -121,7 +121,9 @@ export const getColorSpace = (mockThis) => {
   // when Next.JS runtime is `edge`, process.stdout is undefined, but colors output is supported
   // runtime values supported colors: `nodejs`, `edge`, `experimental-edge`
   const isNextJS = (env.NEXT_RUNTIME || '').indexOf('edge') > -1;
-  const isTTY = isNextJS || (isDeno ? Deno.isatty(1) : stdout && 'isTTY' in stdout);
+  // PM2 does not set process.stdout.isTTY, but colors may be supported (depends on actual terminal)
+  const isPM2 = 'PM2_HOME' in env && 'pm_id' in env;
+  const isTTY = isNextJS || isPM2 || (isDeno ? Deno.isatty(1) : stdout && 'isTTY' in stdout);
 
   if (isForceDisabled) return SPACE_MONO;
 

test/unit.test.js

@@ -646,6 +646,42 @@ describe('Node.JS different env', () => {
     const expected = SPACE_TRUE_COLORS;
     expect(received).toEqual(expected);
   });
+
+  test(`PM2: no isTTY but COLORTERM: 'truecolor'`, () => {
+    const received = colorSpace({
+      process: {
+        env: {
+          PM2_HOME: "/var/www/",
+          pm_id: "1",
+          COLORTERM: 'truecolor'
+        },
+        argv: [],
+        stdout: {},
+        stderr: {},
+      },
+
+    });
+    const expected = SPACE_TRUE_COLORS;
+    expect(received).toEqual(expected);
+  });
+
+  test(`PM2: no isTTY and unsupported terminal`, () => {
+    const received = colorSpace({
+      process: {
+        env: {
+          PM2_HOME: "/var/www/",
+          pm_id: "1",
+          TERM: 'dumb'
+        },
+        argv: [],
+        stdout: {},
+        stderr: {},
+      },
+
+    });
+    const expected = SPACE_MONO;
+    expect(received).toEqual(expected);
+  });
 });
 
 // Deno