Generalize branch references to HEAD

Author: Kobzol

.github/ISSUE_TEMPLATE/tracking_issue.md

@@ -50,7 +50,7 @@ for larger features an implementation could be broken up into multiple PRs.
 [stabilization-guide]: https://rustc-dev-guide.rust-lang.org/stabilization_guide.html#stabilization-pr
 [doc-guide]: https://rustc-dev-guide.rust-lang.org/stabilization_guide.html#documentation-prs
 [nightly-style-procedure]: https://github.com/rust-lang/style-team/blob/main/nightly-style-procedure.md 
-[Style Guide]: https://github.com/rust-lang/rust/tree/master/src/doc/style-guide
+[Style Guide]: https://github.com/rust-lang/rust/tree/HEAD/src/doc/style-guide
 
 ### Unresolved Questions
 <!--

.github/workflows/ci.yml

@@ -323,7 +323,7 @@ jobs:
       # If a some dependent job has failed, this exits with 1.
       - name: calculate the correct exit status
         run: jq --exit-status 'all(.result == "success" or .result == "skipped")' <<< '${{ toJson(needs) }}'
-      # Publish the toolstate if an auto build succeeds (just before push to master)
+      # Publish the toolstate if an auto build succeeds (just before push to the default branch)
       - name: publish toolstate
         run: src/ci/publish_toolstate.sh
         shell: bash

.github/workflows/post-merge.yml

@@ -1,4 +1,4 @@
-# Workflow that runs after a merge to master, analyses changes in test executions
+# Workflow that runs after a merge to the default branch, analyses changes in test executions
 # and posts the result to the merged PR.
 
 name: Post merge analysis

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -213,7 +213,7 @@ impl<'a> IntoIterator for LLVMFeature<'a> {
 ///
 /// Check the current rustc fork of LLVM in the repo at
 /// <https://github.com/rust-lang/llvm-project/>. The commit in use can be found via the
-/// `llvm-project` submodule in <https://github.com/rust-lang/rust/tree/master/src> Though note that
+/// `llvm-project` submodule in <https://github.com/rust-lang/rust/tree/HEAD/src> Though note that
 /// Rust can also be build with an external precompiled version of LLVM which might lead to failures
 /// if the oldest tested / supported LLVM version doesn't yet support the relevant intrinsics.
 pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFeature<'a>> {

compiler/rustc_middle/src/query/mod.rs

@@ -42,7 +42,7 @@
 //!   Only valid for queries returning `Result<_, ErrorGuaranteed>`.
 //!
 //! For the up-to-date list, see the `QueryModifiers` struct in
-//! [`rustc_macros/src/query.rs`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_macros/src/query.rs)
+//! [`rustc_macros/src/query.rs`](https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_macros/src/query.rs)
 //! and for more details in incremental compilation, see the
 //! [Query modifiers in incremental compilation](https://rustc-dev-guide.rust-lang.org/queries/incremental-compilation-in-detail.html#query-modifiers) section of the rustc-dev-guide.
 //!

library/core/src/intrinsics/mod.rs

@@ -5,16 +5,16 @@
 //! intrinsics via stable wrapper functions. Use these instead.
 //!
 //! These are the imports making intrinsics available to Rust code. The actual implementations live in the compiler.
-//! Some of these intrinsics are lowered to MIR in <https://github.com/rust-lang/rust/blob/master/compiler/rustc_mir_transform/src/lower_intrinsics.rs>.
-//! The remaining intrinsics are implemented for the LLVM backend in <https://github.com/rust-lang/rust/blob/master/compiler/rustc_codegen_ssa/src/mir/intrinsic.rs>
-//! and <https://github.com/rust-lang/rust/blob/master/compiler/rustc_codegen_llvm/src/intrinsic.rs>,
-//! and for const evaluation in <https://github.com/rust-lang/rust/blob/master/compiler/rustc_const_eval/src/interpret/intrinsics.rs>.
+//! Some of these intrinsics are lowered to MIR in <https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_mir_transform/src/lower_intrinsics.rs>.
+//! The remaining intrinsics are implemented for the LLVM backend in <https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_codegen_ssa/src/mir/intrinsic.rs>
+//! and <https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_codegen_llvm/src/intrinsic.rs>,
+//! and for const evaluation in <https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_const_eval/src/interpret/intrinsics.rs>.
 //!
 //! # Const intrinsics
 //!
 //! In order to make an intrinsic unstable usable at compile-time, copy the implementation from
 //! <https://github.com/rust-lang/miri/blob/master/src/intrinsics> to
-//! <https://github.com/rust-lang/rust/blob/master/compiler/rustc_const_eval/src/interpret/intrinsics.rs>
+//! <https://github.com/rust-lang/rust/blob/HEAD/compiler/rustc_const_eval/src/interpret/intrinsics.rs>
 //! and make the intrinsic declaration below a `const fn`. This should be done in coordination with
 //! wg-const-eval.
 //!

src/bootstrap/src/lib.rs

@@ -1611,7 +1611,7 @@ impl Build {
         // If available, we read the beta revision from that file.
         // This only happens when building from a source tarball when Git should not be used.
         let count = extract_beta_rev_from_file(self.src.join("version")).unwrap_or_else(|| {
-            // Figure out how many merge commits happened since we branched off master.
+            // Figure out how many merge commits happened since we branched off main.
             // That's our beta number!
             // (Note that we use a `..` range, not the `...` symmetric difference.)
             helpers::git(Some(&self.src))

src/ci/github-actions/jobs.yml

@@ -162,7 +162,7 @@ optional:
       IMAGE: pr-check-1
     <<: *job-linux-4c
 
-# Main CI jobs that have to be green to merge a commit into master.
+# Main CI jobs that have to be green to merge a commit into the default branch.
 #
 # These jobs automatically inherit envs.auto, to avoid repeating it in each job
 # definition.

src/ci/run.sh

@@ -106,7 +106,7 @@ fi
 
 # Always set the release channel for bootstrap; this is normally not important (i.e., only dist
 # builds would seem to matter) but in practice bootstrap wants to know whether we're targeting
-# master, beta, or stable with a build to determine whether to run some checks (notably toolstate).
+# main, beta, or stable with a build to determine whether to run some checks (notably toolstate).
 export RUST_RELEASE_CHANNEL=$(releaseChannel)
 RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --release-channel=$RUST_RELEASE_CHANNEL"
 

src/doc/rustc-dev-guide/src/appendix/code-index.md

@@ -12,7 +12,7 @@ Item            |  Kind    | Short description           | Chapter            |
 `rustc_hir::Crate` | struct | A more abstract, compiler-friendly form of a crate's AST | [The Hir] | [compiler/rustc_hir/src/hir.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/struct.Crate.html)
 `DefId` | struct | One of four types of HIR node identifiers | [Identifiers in the HIR] | [compiler/rustc_hir/src/def_id.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.DefId.html)
 `Diag` | struct | A struct for a compiler diagnostic, such as an error or lint | [Emitting Diagnostics] | [compiler/rustc_errors/src/diagnostic.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_errors/struct.Diag.html)
-`DocContext` | struct | A state container used by rustdoc when crawling through a crate to gather its documentation | [Rustdoc] | [src/librustdoc/core.rs](https://github.com/rust-lang/rust/blob/master/src/librustdoc/core.rs)
+`DocContext` | struct | A state container used by rustdoc when crawling through a crate to gather its documentation | [Rustdoc] | [src/librustdoc/core.rs](https://github.com/rust-lang/rust/blob/HEAD/src/librustdoc/core.rs)
 `HirId` | struct | One of four types of HIR node identifiers | [Identifiers in the HIR] | [compiler/rustc_hir_id/src/lib.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/struct.HirId.html)
 `Lexer` | struct | This is the lexer used during parsing. It consumes characters from the raw source code being compiled and produces a series of tokens for use by the rest of the parser | [The parser] |  [compiler/rustc_parse/src/lexer/mod.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_parse/lexer/struct.Lexer.html)
 `NodeId` | struct | One of four types of HIR node identifiers. Being phased out | [Identifiers in the HIR] | [compiler/rustc_ast/src/ast.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_ast/node_id/struct.NodeId.html)