Merge remote-tracking branch 'upstream/master'

Author: robertbastian

.github/ISSUE_TEMPLATE/bootstrap.md

@@ -0,0 +1,70 @@
+---
+name: Bootstrap (Rust Build System) Report
+about: Issues encountered on bootstrap build system
+labels: C-bug, T-bootstrap
+---
+
+<!--
+Thank you for submitting a bootstrap report! Please provide detailed information to help us reproduce and diagnose the issue.
+-->
+
+### Summary
+
+<!--
+Provide a brief description of the problem you are experiencing.
+-->
+
+### Command used
+
+```sh
+<command>
+```
+
+### Expected behaviour
+
+<!--
+Describe what you expected to happen.
+-->
+
+### Actual behaviour
+
+<!--
+Describe what actually happened.
+-->
+
+### Bootstrap configuration (config.toml)
+```toml
+<config>
+```
+
+### Operating system
+
+<!--
+e.g., Ubuntu 22.04, macOS 12, Windows 10
+-->
+
+### HEAD
+
+<!--
+Output of `git rev-parse HEAD` command, or content of the `git-commit-hash` file if using a tarball source.
+-->
+
+### Additional context
+<!--
+Include any other relevant information (e.g., if you have custom patches or modifications on the project).
+-->
+
+
+<!--
+Include the complete build log in the section below.
+Enable backtrace and verbose mode if possible for more detailed information e.g., with `RUST_BACKTRACE=1 ./x build -v`.
+-->
+<details><summary>Build Log</summary>
+<p>
+
+```txt
+<log>
+```
+
+</p>
+</details>

.github/ISSUE_TEMPLATE/tracking_issue.md

@@ -46,7 +46,7 @@ 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/master/nightly-style-procedure.md 
+[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
 
 ### Unresolved Questions

.github/pull_request_template.md

@@ -7,6 +7,6 @@ tracking issue or there are none, feel free to ignore this.
 This PR will get automatically assigned to a reviewer. In case you would like
 a specific user to review your work, you can assign it to them by using
 
-    r\? <reviewer name> (with the `\` removed)
+    r? <reviewer name>
 -->
 <!-- homu-ignore:end -->

.github/renovate.json5

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  // Let Renovatebot keep an opened issue that tracks our dependencies
+  "dependencyDashboard": true,
+  // Disable "normal" package updates
+  "enabledManagers": [],
+  // Update lockfiles once per week
+  "lockFileMaintenance": {
+    "enabled": true,
+    "schedule": [
+      "before 5am on Tuesday"
+    ]
+  }
+}

.github/workflows/ci.yml

@@ -2,7 +2,7 @@
 # and also on pushes to special branches (auto, try).
 #
 # The actual definition of the executed jobs is calculated by a Python
-# script located at src/ci/github-actions/calculate-job-matrix.py, which
+# script located at src/ci/github-actions/ci.py, which
 # uses job definition data from src/ci/github-actions/jobs.yml.
 # You should primarily modify the `jobs.yml` file if you want to modify
 # what jobs are executed in CI.
@@ -46,7 +46,7 @@ jobs:
   # If you want to modify CI jobs, take a look at src/ci/github-actions/jobs.yml.
   calculate_matrix:
     name: Calculate job matrix
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     outputs:
       jobs: ${{ steps.jobs.outputs.jobs }}
       run_type: ${{ steps.jobs.outputs.run_type }}
@@ -56,18 +56,18 @@ jobs:
       - name: Calculate the CI job matrix
         env:
           COMMIT_MESSAGE: ${{ github.event.head_commit.message }}
-        run: python3 src/ci/github-actions/calculate-job-matrix.py >> $GITHUB_OUTPUT
+        run: python3 src/ci/github-actions/ci.py calculate-job-matrix >> $GITHUB_OUTPUT
         id: jobs
   job:
-    name: ${{ matrix.name }}
+    name: ${{ matrix.full_name }}
     needs: [ calculate_matrix ]
     runs-on: "${{ matrix.os }}"
     defaults:
       run:
         shell: ${{ contains(matrix.os, 'windows') && 'msys2 {0}' || 'bash' }}
-    timeout-minutes: 240
+    timeout-minutes: 360
     env:
-      CI_JOB_NAME: ${{ matrix.image }}
+      CI_JOB_NAME: ${{ matrix.name }}
       CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
       # commit of PR sha or commit sha. `GITHUB_SHA` is not accurate for PRs.
       HEAD_SHA: ${{ github.event.pull_request.head.sha || github.sha }}
@@ -104,6 +104,14 @@ jobs:
         with:
           fetch-depth: 2
 
+      # Free up disk space on Linux by removing preinstalled components that
+      # we do not need. We do this to enable some of the less resource
+      # intensive jobs to run on free runners, which however also have
+      # less disk space.
+      - name: free up disk space
+        uses: jlumbroso/free-disk-space@54081f138730dfa15788a46383842cd2f914a1be
+        if: matrix.free_disk
+
       # Rust Log Analyzer can't currently detect the PR number of a GitHub
       # Actions build on its own, so a hint in the log message is needed to
       # point it in the right direction.
@@ -122,6 +130,9 @@ jobs:
           # which then uses log commands to actually set them.
           EXTRA_VARIABLES: ${{ toJson(matrix.env) }}
 
+      - name: setup upstream remote
+        run: src/ci/scripts/setup-upstream-remote.sh
+
       - name: ensure the channel matches the target branch
         run: src/ci/scripts/verify-channel.sh
 
@@ -191,6 +202,11 @@ jobs:
       - name: create github artifacts
         run: src/ci/scripts/create-doc-artifacts.sh
 
+      - name: print disk usage
+        run: |
+          echo "disk usage:"
+          df -h
+
       - name: upload artifacts to github
         uses: actions/upload-artifact@v4
         with:
@@ -217,16 +233,17 @@ jobs:
         env:
           DATADOG_SITE: datadoghq.com
           DATADOG_API_KEY: ${{ secrets.DATADOG_API_KEY }}
-          DD_GITHUB_JOB_NAME: ${{ matrix.name }}
+          DD_GITHUB_JOB_NAME: ${{ matrix.full_name }}
         run: |
-          npm install -g @datadog/datadog-ci@^2.x.x
-          python3 src/ci/scripts/upload-build-metrics.py build/cpu-usage.csv
+          cd src/ci
+          npm ci
+          python3 scripts/upload-build-metrics.py ../../build/cpu-usage.csv
 
   # This job isused to tell bors the final status of the build, as there is no practical way to detect
   # when a workflow is successful listening to webhooks only in our current bors implementation (homu).
   outcome:
     name: bors build finished
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     needs: [ calculate_matrix, job ]
     # !cancelled() executes the job regardless of whether the previous jobs passed or failed
     if: ${{ !cancelled() && contains(fromJSON('["auto", "try"]'), needs.calculate_matrix.outputs.run_type) }}

.github/workflows/dependencies.yml

@@ -27,7 +27,7 @@ jobs:
   not-waiting-on-bors:
     if: github.repository_owner == 'rust-lang'
     name: skip if S-waiting-on-bors
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -47,7 +47,7 @@ jobs:
     if: github.repository_owner == 'rust-lang'
     name: update dependencies
     needs: not-waiting-on-bors
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: checkout the source code
         uses: actions/checkout@v4
@@ -94,7 +94,7 @@ jobs:
     if: github.repository_owner == 'rust-lang'
     name: amend PR
     needs: update
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     permissions:
       contents: write
       pull-requests: write

.github/workflows/ghcr.yml

@@ -0,0 +1,68 @@
+# Mirror DockerHub images used by the Rust project to ghcr.io.
+# Images are available at https://github.com/orgs/rust-lang/packages.
+#
+# In some CI jobs, we pull images from ghcr.io instead of Docker Hub because
+# Docker Hub has a rate limit, while ghcr.io doesn't.
+# Those images are pushed to ghcr.io by this job.
+#
+# Note that authenticating to DockerHub or other registries isn't possible
+# for PR jobs, because forks can't access secrets.
+# That's why we use ghcr.io: it has no rate limit and it doesn't require authentication.
+
+name: GHCR image mirroring
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Run daily at midnight UTC
+    - cron: '0 0 * * *'
+
+jobs:
+  mirror:
+    name: DockerHub mirror
+    runs-on: ubuntu-24.04
+    if: github.repository == 'rust-lang/rust'
+    permissions:
+      # Needed to write to the ghcr.io registry
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Log in to registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin
+
+      # Download crane in the current directory.
+      # We use crane because it copies the docker image for all the architectures available in
+      # DockerHub for the image.
+      # Learn more about crane at
+      # https://github.com/google/go-containerregistry/blob/main/cmd/crane/README.md
+      - name: Download crane
+        run: |
+          curl -sL "https://github.com/google/go-containerregistry/releases/download/${VERSION}/go-containerregistry_${OS}_${ARCH}.tar.gz" | tar -xzf -
+        env:
+          VERSION: v0.20.2
+          OS: Linux
+          ARCH: x86_64
+
+      - name: Mirror DockerHub
+        run: |
+          # List of DockerHub images to mirror to ghcr.io
+          images=(
+            # Mirrored because used by the mingw-check-tidy, which doesn't cache Docker images
+            "ubuntu:22.04"
+            # Mirrored because used by all linux CI jobs, including mingw-check-tidy
+            "moby/buildkit:buildx-stable-1"
+          )
+
+          # Mirror each image from DockerHub to ghcr.io
+          for img in "${images[@]}"; do
+            echo "Mirroring ${img}..."
+            # Remove namespace from the image if any.
+            # E.g. "moby/buildkit:buildx-stable-1" becomes "buildkit:buildx-stable-1"
+            dest_image=$(echo "${img}" | cut -d'/' -f2-)
+            ./crane copy \
+              "docker.io/${img}" \
+              "ghcr.io/${{ github.repository_owner }}/${dest_image}"
+          done

.gitignore

@@ -46,8 +46,7 @@ no_llvm_build
 /inst/
 /llvm/
 /mingw-build/
-build/
-!/compiler/rustc_mir_build/src/build/
+/build
 /build-rust-analyzer/
 /dist/
 /unicode-downloads
@@ -57,6 +56,8 @@ build/
 /src/tools/x/target
 # Created by default with `src/ci/docker/run.sh`
 /obj/
+# Created by nix dev shell / .envrc
+src/tools/nix-dev-shell/flake.lock
 
 ## ICE reports
 rustc-ice-*.txt
@@ -87,12 +88,12 @@ package.json
 tests/rustdoc-gui/src/**.lock
 
 ## direnv
-.envrc
-.direnv/
+/.envrc
+/.direnv/
 
 ## nix
-flake.nix
+/flake.nix
 flake.lock
-default.nix
+/default.nix
 
 # Before adding new lines, see the comment at the top.

.gitmodules

@@ -22,18 +22,14 @@
 	path = library/stdarch
 	url = https://github.com/rust-lang/stdarch.git
 	shallow = true
-[submodule "src/doc/rustc-dev-guide"]
-	path = src/doc/rustc-dev-guide
-	url = https://github.com/rust-lang/rustc-dev-guide.git
-	shallow = true
 [submodule "src/doc/edition-guide"]
 	path = src/doc/edition-guide
 	url = https://github.com/rust-lang/edition-guide.git
 	shallow = true
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/19.1-2024-09-17
+	branch = rustc/19.1-2024-12-03
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book