moved install config parsing logic to toml/install.rs

Author: Shourya742

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

@@ -486,16 +486,7 @@ impl Config {
         // Verbose flag is a good default for `rust.verbose-tests`.
         config.verbose_tests = config.is_verbose();
 
-        if let Some(install) = toml.install {
-            let Install { prefix, sysconfdir, docdir, bindir, libdir, mandir, datadir } = install;
-            config.prefix = prefix.map(PathBuf::from);
-            config.sysconfdir = sysconfdir.map(PathBuf::from);
-            config.datadir = datadir.map(PathBuf::from);
-            config.docdir = docdir.map(PathBuf::from);
-            set(&mut config.bindir, bindir.map(PathBuf::from));
-            config.libdir = libdir.map(PathBuf::from);
-            config.mandir = mandir.map(PathBuf::from);
-        }
+        config.apply_install_config(toml.install);
 
         config.llvm_assertions =
             toml.llvm.as_ref().is_some_and(|llvm| llvm.assertions.unwrap_or(false));

src/bootstrap/src/core/config/toml/install.rs

@@ -1,7 +1,8 @@
 use serde::{Deserialize, Deserializer};
 
+use crate::core::config::set;
 use crate::core::config::toml::{Merge, ReplaceOpt};
-use crate::{HashSet, PathBuf, define_config, exit};
+use crate::{Config, HashSet, PathBuf, define_config, exit};
 
 define_config! {
     /// TOML representation of various global install decisions.
@@ -15,3 +16,18 @@ define_config! {
         datadir: Option<String> = "datadir",
     }
 }
+
+impl Config {
+    pub fn apply_install_config(&mut self, toml_install: Option<Install>) {
+        if let Some(install) = toml_install {
+            let Install { prefix, sysconfdir, docdir, bindir, libdir, mandir, datadir } = install;
+            self.prefix = prefix.map(PathBuf::from);
+            self.sysconfdir = sysconfdir.map(PathBuf::from);
+            self.datadir = datadir.map(PathBuf::from);
+            self.docdir = docdir.map(PathBuf::from);
+            set(&mut self.bindir, bindir.map(PathBuf::from));
+            self.libdir = libdir.map(PathBuf::from);
+            self.mandir = mandir.map(PathBuf::from);
+        }
+    }
+}