make rust-analyzer settings use dedicated directory

This avoids rust-analyzer having to wait for a build lock due to ./x
running other commands (and the other way around).

This was inspired by Helix settings.

Author: tshepang

src/bootstrap/src/core/build_steps/setup.rs

@@ -586,6 +586,7 @@ Select which editor you would like to set up [default: None]: ";
                 "b5dd299b93dca3ceeb9b335f929293cb3d4bf4977866fbe7ceeac2a8a9f99088",
                 "631c837b0e98ae35fd48b0e5f743b1ca60adadf2d0a2b23566ba25df372cf1a9",
                 "080955765db84bb6cbf178879f489c4e2369397626a6ecb3debedb94a9d0b3ce",
+                "be95b948c04bc0a2c6f4852a7cf52fdb5bedb1affc208942b8ef813a741dda4c",
             ],
             EditorKind::Helix => &[
                 "2d3069b8cf1b977e5d4023965eb6199597755e6c96c185ed5f2854f98b83d233",
@@ -607,12 +608,14 @@ Select which editor you would like to set up [default: None]: ";
                 "e53e9129ca5ee5dcbd6ec8b68c2d87376474eb154992deba3c6d9ab1703e0717",
                 "f954316090936c7e590c253ca9d524008375882fa13c5b41d7e2547a896ff893",
                 "701b73751efd7abd6487f2c79348dab698af7ac4427b79fa3d2087c867144b12",
+                "d1bc5c13ce84bba368aeb86a1c6c91e11c9050f3fa646ec970041f1bfa0764ee",
             ],
             EditorKind::Zed => &[
                 "bbce727c269d1bd0c98afef4d612eb4ce27aea3c3a8968c5f10b31affbc40b6c",
                 "a5380cf5dd9328731aecc5dfb240d16dac46ed272126b9728006151ef42f5909",
                 "2e96bf0d443852b12f016c8fc9840ab3d0a2b4fe0b0fb3a157e8d74d5e7e0e26",
                 "4fadd4c87389a601a27db0d3d74a142fa3a2e656ae78982e934dbe24bee32ad6",
+                "eadff223a5cf26a64989ebfcc7a82106f94bb921237b38c78a6aa5129f1e3edc",
             ],
         }
     }

src/etc/rust_analyzer_eglot.el

@@ -6,7 +6,9 @@
                                        :overrideCommand ["python3"
                                                          "x.py"
                                                          "check"
-                                                         "--json-output"])
+                                                         "--json-output"
+                                                         "--build-dir"
+                                                         "build/rust-analyzer"])
                  :linkedProjects ["Cargo.toml"
                                   "compiler/rustc_codegen_cranelift/Cargo.toml"
                                   "compiler/rustc_codegen_gcc/Cargo.toml"
@@ -23,7 +25,9 @@
                                                   :overrideCommand ["python3"
                                                                     "x.py"
                                                                     "check"
-                                                                    "--json-output"])
+                                                                    "--json-output"
+                                                                    "--build-dir"
+                                                                    "build/rust-analyzer"])
                                         :sysrootSrc "./library"
                                         :extraEnv (:RUSTC_BOOTSTRAP "1"))
                  :rustc ( :source "./Cargo.toml" )))))))

src/etc/rust_analyzer_settings.json

@@ -5,7 +5,9 @@
         "python3",
         "x.py",
         "check",
-        "--json-output"
+        "--json-output",
+        "--build-dir",
+        "build/rust-analyzer"
     ],
     "rust-analyzer.linkedProjects": [
         "Cargo.toml",
@@ -27,7 +29,9 @@
         "python3",
         "x.py",
         "check",
-        "--json-output"
+        "--json-output",
+        "--build-dir",
+        "build/rust-analyzer"
     ],
     "rust-analyzer.cargo.sysrootSrc": "./library",
     "rust-analyzer.rustc.source": "./Cargo.toml",

src/etc/rust_analyzer_zed.json

@@ -7,7 +7,14 @@
             "enable": true,
             "invocationLocation": "root",
             "invocationStrategy": "once",
-            "overrideCommand": ["python3", "x.py", "check", "--json-output"]
+            "overrideCommand": [
+              "python3",
+              "x.py",
+              "check",
+              "--json-output",
+              "--build-dir",
+              "build/rust-analyzer"
+            ]
           },
           "extraEnv": {
             "RUSTC_BOOTSTRAP": "1"
@@ -17,7 +24,14 @@
         "check": {
           "invocationLocation": "root",
           "invocationStrategy": "once",
-          "overrideCommand": ["python3", "x.py", "check", "--json-output"]
+          "overrideCommand": [
+            "python3",
+            "x.py",
+            "check",
+            "--json-output",
+            "--build-dir",
+            "build/rust-analyzer"
+          ]
         },
         "linkedProjects": [
           "Cargo.toml",