Auto merge of #124360 - matthiaskrgr:rollup-k6bffhd, r=matthiaskrgr

Rollup of 3 pull requests

Successful merges:

 - #124257 (Rewrite the `no-input-file.stderr` test in Rust and support diff)
 - #124324 (Minor AST cleanups)
 - #124327 (CI: implement job skipping in Python matrix calculation)

r? `@ghost`
`@rustbot` modify labels: rollup

.github/workflows/ci.yml

@@ -88,96 +88,70 @@ jobs:
         run: "echo \"[CI_PR_NUMBER=$num]\""
         env:
           num: "${{ github.event.number }}"
-        if: "success() && !env.SKIP_JOB && github.event_name == 'pull_request'"
+        if: "success() && github.event_name == 'pull_request'"
       - name: add extra environment variables
         run: src/ci/scripts/setup-environment.sh
         env:
           EXTRA_VARIABLES: "${{ toJson(matrix.env) }}"
-        if: success() && !env.SKIP_JOB
-      - name: decide whether to skip this job
-        run: src/ci/scripts/should-skip-this.sh
-        if: success() && !env.SKIP_JOB
       - name: ensure the channel matches the target branch
         run: src/ci/scripts/verify-channel.sh
-        if: success() && !env.SKIP_JOB
       - name: collect CPU statistics
         run: src/ci/scripts/collect-cpu-stats.sh
-        if: success() && !env.SKIP_JOB
       - name: show the current environment
         run: src/ci/scripts/dump-environment.sh
-        if: success() && !env.SKIP_JOB
       - name: install awscli
         run: src/ci/scripts/install-awscli.sh
-        if: success() && !env.SKIP_JOB
       - name: install sccache
         run: src/ci/scripts/install-sccache.sh
-        if: success() && !env.SKIP_JOB
       - name: select Xcode
         run: src/ci/scripts/select-xcode.sh
-        if: success() && !env.SKIP_JOB
       - name: install clang
         run: src/ci/scripts/install-clang.sh
-        if: success() && !env.SKIP_JOB
       - name: install tidy
         run: src/ci/scripts/install-tidy.sh
-        if: success() && !env.SKIP_JOB
       - name: install WIX
         run: src/ci/scripts/install-wix.sh
-        if: success() && !env.SKIP_JOB
       - name: disable git crlf conversion
         run: src/ci/scripts/disable-git-crlf-conversion.sh
-        if: success() && !env.SKIP_JOB
       - name: checkout submodules
         run: src/ci/scripts/checkout-submodules.sh
-        if: success() && !env.SKIP_JOB
       - name: install MSYS2
         run: src/ci/scripts/install-msys2.sh
-        if: success() && !env.SKIP_JOB
       - name: install MinGW
         run: src/ci/scripts/install-mingw.sh
-        if: success() && !env.SKIP_JOB
       - name: install ninja
         run: src/ci/scripts/install-ninja.sh
-        if: success() && !env.SKIP_JOB
       - name: enable ipv6 on Docker
         run: src/ci/scripts/enable-docker-ipv6.sh
-        if: success() && !env.SKIP_JOB
       - name: disable git crlf conversion
         run: src/ci/scripts/disable-git-crlf-conversion.sh
-        if: success() && !env.SKIP_JOB
       - name: ensure line endings are correct
         run: src/ci/scripts/verify-line-endings.sh
-        if: success() && !env.SKIP_JOB
       - name: ensure backported commits are in upstream branches
         run: src/ci/scripts/verify-backported-commits.sh
-        if: success() && !env.SKIP_JOB
       - name: ensure the stable version number is correct
         run: src/ci/scripts/verify-stable-version-number.sh
-        if: success() && !env.SKIP_JOB
       - name: run the build
         run: src/ci/scripts/run-build-from-ci.sh 2>&1
         env:
           AWS_ACCESS_KEY_ID: "${{ env.CACHES_AWS_ACCESS_KEY_ID }}"
           AWS_SECRET_ACCESS_KEY: "${{ secrets[format('AWS_SECRET_ACCESS_KEY_{0}', env.CACHES_AWS_ACCESS_KEY_ID)] }}"
           TOOLSTATE_REPO_ACCESS_TOKEN: "${{ secrets.TOOLSTATE_REPO_ACCESS_TOKEN }}"
-        if: success() && !env.SKIP_JOB
       - name: create github artifacts
         run: src/ci/scripts/create-doc-artifacts.sh
-        if: success() && !env.SKIP_JOB
       - name: upload artifacts to github
         uses: actions/upload-artifact@v4
         with:
           name: "${{ env.DOC_ARTIFACT_NAME }}"
           path: obj/artifacts/doc
           if-no-files-found: ignore
           retention-days: 5
-        if: success() && !env.SKIP_JOB
       - name: upload artifacts to S3
         run: src/ci/scripts/upload-artifacts.sh
         env:
           AWS_ACCESS_KEY_ID: "${{ env.ARTIFACTS_AWS_ACCESS_KEY_ID }}"
           AWS_SECRET_ACCESS_KEY: "${{ secrets[format('AWS_SECRET_ACCESS_KEY_{0}', env.ARTIFACTS_AWS_ACCESS_KEY_ID)] }}"
-        if: "success() && !env.SKIP_JOB && (github.event_name == 'push' || env.DEPLOY == '1' || env.DEPLOY_ALT == '1')"
+        if: "success() && (github.event_name == 'push' || env.DEPLOY == '1' || env.DEPLOY_ALT == '1')"
   master:
     name: master
     runs-on: ubuntu-latest
@@ -202,7 +176,6 @@ jobs:
         shell: bash
         env:
           TOOLSTATE_REPO_ACCESS_TOKEN: "${{ secrets.TOOLSTATE_REPO_ACCESS_TOKEN }}"
-        if: success() && !env.SKIP_JOB
   try-success:
     needs:
       - job

Cargo.lock

@@ -3343,6 +3343,7 @@ version = "0.0.0"
 dependencies = [
  "object 0.34.0",
  "regex",
+ "similar",
  "wasmparser",
 ]
 
@@ -5138,6 +5139,12 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "similar"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa42c91313f1d05da9b26f267f931cf178d4aba455b4c4622dd7355eb80c6640"
+
 [[package]]
 name = "siphasher"
 version = "0.3.11"

compiler/rustc_ast/src/ast.rs

@@ -2786,6 +2786,7 @@ pub enum AttrKind {
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct NormalAttr {
     pub item: AttrItem,
+    // Tokens for the full attribute, e.g. `#[foo]`, `#![bar]`.
     pub tokens: Option<LazyAttrTokenStream>,
 }
 
@@ -2802,6 +2803,7 @@ impl NormalAttr {
 pub struct AttrItem {
     pub path: Path,
     pub args: AttrArgs,
+    // Tokens for the meta item, e.g. just the `foo` within `#[foo]` or `#![foo]`.
     pub tokens: Option<LazyAttrTokenStream>,
 }
 

compiler/rustc_ast/src/attr/mod.rs

@@ -298,7 +298,10 @@ impl MetaItem {
     }
 
     pub fn value_str(&self) -> Option<Symbol> {
-        self.kind.value_str()
+        match &self.kind {
+            MetaItemKind::NameValue(v) => v.kind.str(),
+            _ => None,
+        }
     }
 
     fn from_tokens<'a, I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItem>
@@ -362,13 +365,6 @@ impl MetaItem {
 }
 
 impl MetaItemKind {
-    pub fn value_str(&self) -> Option<Symbol> {
-        match self {
-            MetaItemKind::NameValue(v) => v.kind.str(),
-            _ => None,
-        }
-    }
-
     fn list_from_tokens(tokens: TokenStream) -> Option<ThinVec<NestedMetaItem>> {
         let mut tokens = tokens.trees().peekable();
         let mut result = ThinVec::new();
@@ -468,8 +464,9 @@ impl NestedMetaItem {
         self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
     }
 
-    /// Returns a name and single literal value tuple of the `MetaItem`.
-    pub fn name_value_literal(&self) -> Option<(Symbol, &MetaItemLit)> {
+    /// If it's a singleton list of the form `foo(lit)`, returns the `foo` and
+    /// the `lit`.
+    pub fn singleton_lit_list(&self) -> Option<(Symbol, &MetaItemLit)> {
         self.meta_item().and_then(|meta_item| {
             meta_item.meta_item_list().and_then(|meta_item_list| {
                 if meta_item_list.len() == 1