Swift: make extractor compilable with Swift 6

.gitattributes

@@ -86,4 +86,5 @@
 /misc/ripunzip/ripunzip-* filter=lfs diff=lfs merge=lfs -text
 
 # swift prebuilt resources
-/swift/third_party/resource-dir/*.zip filter=lfs diff=lfs merge=lfs -text
+/swift/third_party/resources/*.zip filter=lfs diff=lfs merge=lfs -text
+/swift/third_party/resources/*.tar.zst filter=lfs diff=lfs merge=lfs -text

.github/workflows/swift.yml

@@ -50,17 +50,10 @@ jobs:
       - uses: ./swift/actions/build-and-test
   build-and-test-linux:
     if: github.repository_owner == 'github'
-    runs-on: ubuntu-latest-xl
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - uses: ./swift/actions/build-and-test
-  qltests-linux:
-    if: github.repository_owner == 'github'
-    needs: build-and-test-linux
-    runs-on: ubuntu-latest-xl
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./swift/actions/run-ql-tests
   qltests-macos:
     if: ${{ github.repository_owner == 'github' && github.event_name == 'pull_request' }}
     needs: build-and-test-macos
@@ -109,3 +102,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/fetch-codeql
       - uses: ./swift/actions/database-upgrade-scripts
+  check-no-override:
+    if : github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - shell: bash
+        run: bazel test //swift/... --test_tag_filters=override --test_output=errors

MODULE.bazel

@@ -29,6 +29,7 @@ bazel_dep(name = "gazelle", version = "0.40.0")
 bazel_dep(name = "rules_dotnet", version = "0.17.4")
 bazel_dep(name = "googletest", version = "1.14.0.bcr.1")
 bazel_dep(name = "rules_rust", version = "0.52.2")
+bazel_dep(name = "zstd", version = "1.5.5.bcr.1")
 
 bazel_dep(name = "buildifier_prebuilt", version = "6.4.0", dev_dependency = True)
 
@@ -95,10 +96,12 @@ use_repo(
     swift_deps,
     "binlog",
     "picosha2",
-    "swift_prebuilt_darwin_x86_64",
-    "swift_prebuilt_linux",
-    "swift_toolchain_linux",
-    "swift_toolchain_macos",
+    "swift-prebuilt-linux",
+    "swift-prebuilt-linux-download-only",
+    "swift-prebuilt-macos",
+    "swift-prebuilt-macos-download-only",
+    "swift-resource-dir-linux",
+    "swift-resource-dir-macos",
 )
 
 node = use_extension("@rules_nodejs//nodejs:extensions.bzl", "node")
@@ -190,16 +193,6 @@ lfs_files(
     executable = True,
 )
 
-lfs_files(
-    name = "swift-resource-dir-linux",
-    srcs = ["//swift/third_party/resource-dir:resource-dir-linux.zip"],
-)
-
-lfs_files(
-    name = "swift-resource-dir-macos",
-    srcs = ["//swift/third_party/resource-dir:resource-dir-macos.zip"],
-)
-
 register_toolchains(
     "@nodejs_toolchains//:all",
 )

misc/bazel/lfs.bzl

@@ -77,6 +77,12 @@ def _download_lfs(repository_ctx):
         )
     repository_ctx.file("BUILD.bazel", build)
 
+    # this is for drop-in compatibility with `http_file`
+    repository_ctx.file(
+        "file/BUILD.bazel",
+        'alias(name = "file", actual = "//:%s", visibility = ["//visibility:public"])\n' % name,
+    )
+
 lfs_archive = repository_rule(
     doc = "Export the contents from an on-demand LFS archive. The corresponding path should be added to be ignored " +
           "in `.lfsconfig`.",

swift/BUILD.bazel

@@ -1,5 +1,4 @@
 load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup")
-load("//:defs.bzl", "codeql_platform")
 load(
     "//misc/bazel:pkg.bzl",
     "codeql_pack",
@@ -81,7 +80,7 @@ codeql_pack(
     zips = select({
         "@platforms//os:windows": {},
         "//conditions:default": {
-            "//swift/third_party/resource-dir": "resource-dir/{CODEQL_PLATFORM}",
+            "//swift/third_party/resources:dir": "resource-dir/{CODEQL_PLATFORM}",
         },
     }),
 )
@@ -90,29 +89,3 @@ alias(
     name = "create-extractor-pack",
     actual = ":swift-installer",
 )
-
-# TODO: following rules are for internal repo backward compatibility only
-alias(
-    name = "extractor-pack-generic",
-    actual = "swift-generic",
-    visibility = ["//visibility:public"],
-)
-
-pkg_filegroup(
-    name = "resource-dir",
-    srcs = select({
-        "@platforms//os:linux": ["@swift_toolchain_linux//:resource-dir-files"],
-        "@platforms//os:macos": ["@swift_toolchain_macos//:resource-dir-files"],
-        "@platforms//os:windows": [],
-    }),
-    prefix = "resource-dir/" + codeql_platform,
-)
-
-pkg_filegroup(
-    name = "extractor-pack-arch",
-    srcs = [
-        ":resource-dir",
-        ":swift-arch",
-    ],
-    visibility = ["//visibility:public"],
-)

swift/README.md

@@ -113,3 +113,8 @@ In particular for breakpoints to work you might need to setup the following remo
 ### Thread safety
 
 The extractor is single-threaded, and there was no effort to make anything in it thread-safe.
+
+### Updating the swift compiler version
+
+This can only be done with access to the internal repository at the moment. Some (incomplete) instructions are
+found [here](third_party/resources/updating.md).

swift/actions/build-and-test/action.yml

@@ -58,7 +58,7 @@ runs:
       if: ${{ github.event_name == 'pull_request' }}
       shell: bash
       run: |
-        bazel test //swift/...
+        bazel test //swift/... --test_tag_filters=-override --test_output=errors
     - name: Evict bazel cache
       if: ${{ github.event_name != 'pull_request' }}
       shell: bash