Rollup merge of rust-lang#137147 - Shourya742:2025-02-16-support-exclude-in-config.toml, r=onur-ozkan

Add exclude to config.toml

Closes: rust-lang#35678

r? `````@onur-ozkan`````

Author: tgross35

config.example.toml

@@ -425,6 +425,10 @@
 # a specific version.
 #ccache = false
 
+# List of paths to exclude from the build and test processes. 
+# For example, exclude = ["tests/ui", "src/tools/tidy"].
+#exclude = []
+
 # =============================================================================
 # General install configuration options
 # =============================================================================

src/bootstrap/src/core/config/config.rs

@@ -942,6 +942,7 @@ define_config! {
         jobs: Option<u32> = "jobs",
         compiletest_diff_tool: Option<String> = "compiletest-diff-tool",
         ccache: Option<StringOrBool> = "ccache",
+        exclude: Option<Vec<PathBuf>> = "exclude",
     }
 }
 
@@ -1372,22 +1373,6 @@ impl Config {
             "flags.exclude" = ?flags.exclude
         );
 
-        config.skip = flags
-            .skip
-            .into_iter()
-            .chain(flags.exclude)
-            .map(|p| {
-                // Never return top-level path here as it would break `--skip`
-                // logic on rustc's internal test framework which is utilized
-                // by compiletest.
-                if cfg!(windows) {
-                    PathBuf::from(p.to_str().unwrap().replace('/', "\\"))
-                } else {
-                    p
-                }
-            })
-            .collect();
-
         #[cfg(feature = "tracing")]
         span!(
             target: "CONFIG_HANDLING",
@@ -1632,8 +1617,29 @@ impl Config {
             jobs,
             compiletest_diff_tool,
             mut ccache,
+            exclude,
         } = toml.build.unwrap_or_default();
 
+        let mut paths: Vec<PathBuf> = flags.skip.into_iter().chain(flags.exclude).collect();
+
+        if let Some(exclude) = exclude {
+            paths.extend(exclude);
+        }
+
+        config.skip = paths
+            .into_iter()
+            .map(|p| {
+                // Never return top-level path here as it would break `--skip`
+                // logic on rustc's internal test framework which is utilized
+                // by compiletest.
+                if cfg!(windows) {
+                    PathBuf::from(p.to_str().unwrap().replace('/', "\\"))
+                } else {
+                    p
+                }
+            })
+            .collect();
+
         config.jobs = Some(threads_from_config(flags.jobs.unwrap_or(jobs.unwrap_or(0))));
 
         if let Some(file_build) = build {

src/bootstrap/src/core/config/tests.rs

@@ -515,3 +515,17 @@ fn test_explicit_stage() {
     assert!(!config.explicit_stage_from_config);
     assert!(!config.is_explicit_stage());
 }
+
+#[test]
+fn test_exclude() {
+    let config = parse("build.exclude=[\"test/codegen\"]");
+
+    let first_excluded = config
+        .skip
+        .first()
+        .expect("Expected at least one excluded path")
+        .to_str()
+        .expect("Failed to convert excluded path to string");
+
+    assert_eq!(first_excluded, "test/codegen");
+}

src/bootstrap/src/utils/change_tracker.rs

@@ -365,4 +365,9 @@ pub const CONFIG_CHANGE_HISTORY: &[ChangeInfo] = &[
         severity: ChangeSeverity::Info,
         summary: "`rust.channel` now supports \"auto-detect\" to load the channel from `src/ci/channel`",
     },
+    ChangeInfo {
+        change_id: 137147,
+        severity: ChangeSeverity::Info,
+        summary: "New option `build.exclude` that adds support for excluding test.",
+    },
 ];