feat(core): Add NX_DEFAULT_OUTPUT_STYLE env var

Allows setting a default output style instead of having to include it on every command

Closes #27490

Author: avens19

astro-docs/src/content/docs/reference/environment-variables.mdoc

@@ -18,6 +18,7 @@ The following environment variables are ones that you can set to change the beha
 | `NX_CACHE_PROJECT_GRAPH`           | boolean        | If set to `false`, disables the project graph cache. Most useful when developing a plugin that modifies the project graph.                                                                                                          |
 | `NX_DAEMON`                        | boolean        | If set to `false`, disables the Nx daemon process. Disable the daemon to print `console.log` statements in plugin code you are developing.                                                                                          |
 | `NX_DEFAULT_PROJECT`               | string         | The default project used for commands which require a project. e.g. `nx build`, `nx g component`, etc.                                                                                                                              |
+| `NX_DEFAULT_OUTPUT_STYLE`          | string         | The default output style to use when running tasks. Can be overridden on the command line with `--outputStyle`.                                                                                                                     |
 | `NX_HEAD`                          | string         | The default head branch to use when calculating the affected projects. Can be overridden on the command line with `--head`.                                                                                                         |
 | `NX_PERF_LOGGING`                  | boolean        | If set to `true`, will print debug information useful for profiling executors and Nx itself                                                                                                                                         |
 | `NX_PROFILE`                       | string         | Prepend `NX_PROFILE=profile.json` before running targets with Nx to generate a file that be [loaded in Chrome dev tools](/docs/troubleshooting/performance-profiling) to visualize the performance of Nx across multiple processes. |

packages/nx/src/command-line/yargs-utils/shared-options.spec.ts

@@ -100,6 +100,22 @@ describe('shared-options', () => {
         }
       ));
 
+    it('should use NX_DEFAULT_OUTPUT_STYLE if not set', () =>
+      withEnvironmentVariables(
+        {
+          NX_TUI: false,
+          CI: 'false',
+          NX_TUI_SKIP_CAPABILITY_CHECK: 'true',
+          NX_DEFAULT_OUTPUT_STYLE: 'stream-without-prefixes',
+        },
+        () => {
+          const command = withOutputStyleOption(argv);
+          const result = command.parseSync([]);
+          expect(result.outputStyle).toEqual('stream-without-prefixes');
+        }
+      )
+    );
+
     it('should set NX_TUI if using not set', () =>
       withEnvironmentVariables(
         {

packages/nx/src/command-line/yargs-utils/shared-options.ts

@@ -324,6 +324,14 @@ export function withOutputStyleOption<T>(
       choices,
     })
     .middleware([
+      (args) => {
+        if (
+          !args.outputStyle && 
+          process.env.NX_DEFAULT_OUTPUT_STYLE && 
+          choices.includes(process.env.NX_DEFAULT_OUTPUT_STYLE as OutputStyle)) {
+            args.outputStyle = process.env.NX_DEFAULT_OUTPUT_STYLE;
+        }
+      },
       (args) => {
         const useTui = shouldUseTui(readNxJson(), args as NxArgs);
         if (useTui) {