merge rustup-toolchain into ./miri

Author: RalfJung

.github/workflows/ci.yml

@@ -67,9 +67,9 @@ jobs:
         shell: bash
         run: |
           if [[ ${{ github.event_name }} == 'schedule' ]]; then
-            ./rustup-toolchain HEAD --host ${{ matrix.host_target }}
+            ./miri toolchain HEAD --host ${{ matrix.host_target }}
           else
-            ./rustup-toolchain "" --host ${{ matrix.host_target }}
+            ./miri toolchain "" --host ${{ matrix.host_target }}
           fi
 
       - name: Show Rust version
@@ -118,7 +118,7 @@ jobs:
       - name: Install "master" toolchain
         shell: bash
         run: |
-          ./rustup-toolchain "" -c clippy
+          ./miri toolchain
 
       - name: Show Rust version
         run: |

.gitpod.yml

@@ -4,6 +4,6 @@ tasks:
   - before: echo "..."
     init: |
       cargo install rustup-toolchain-install-master
-      ./rustup-toolchain
+      ./miri toolchain
       ./miri build
-    command: echo "Run tests with ./miri test"
+    command: echo "Run tests with ./miri test"

CONTRIBUTING.md

@@ -23,13 +23,13 @@ tested against. Other versions will likely not work. After installing
 [`rustup-toolchain-install-master`], you can run the following command to
 install that exact version of rustc as a toolchain:
 ```
-./rustup-toolchain
+./miri toolchain
 ```
 This will set up a rustup toolchain called `miri` and set it as an override for
 the current directory.
 
 You can also create a `.auto-everything` file (contents don't matter, can be empty), which
-will cause any `./miri` command to automatically call `rustup-toolchain`, `clippy` and `rustfmt`
+will cause any `./miri` command to automatically call `./miri toolchain`, `clippy` and `rustfmt`
 for you. If you don't want all of these to happen, you can add individual `.auto-toolchain`,
 `.auto-clippy` and `.auto-fmt` files respectively.
 
@@ -132,7 +132,7 @@ development version of Miri using
 and then you can use it as if it was installed by `rustup`.  Make sure you use
 the same toolchain when calling `cargo miri` that you used when installing Miri!
 Usually this means you have to write `cargo +miri miri ...` to select the `miri`
-toolchain that was installed by `./rustup-toolchain`.
+toolchain that was installed by `./miri toolchain`.
 
 There's a test for the cargo wrapper in the `test-cargo-miri` directory; run
 `./run-test.py` in there to execute it. Like `./miri test`, this respects the
@@ -214,7 +214,7 @@ for changes in rustc. In both cases, `rustc-version` needs updating.
 
 To update the `rustc-version` file and install the latest rustc, you can run:
 ```
-./rustup-toolchain HEAD
+./miri toolchain HEAD
 ```
 
 Now edit Miri until `./miri test` passes, and submit a PR. Generally, it is
@@ -297,7 +297,7 @@ We assume we start on an up-to-date master branch in the Miri repo.
 # Fetch and merge rustc side of the history. Takes ca 5 min the first time.
 ./miri rustc-pull
 # Update toolchain reference and apply formatting.
-./rustup-toolchain HEAD && ./miri fmt
+./miri toolchain HEAD && ./miri fmt
 git commit -am "rustup"
 ```
 

README.md

@@ -419,9 +419,9 @@ Some native rustc `-Z` flags are also very relevant for Miri:
 
 Moreover, Miri recognizes some environment variables:
 
-* `MIRI_AUTO_OPS` indicates whether the automatic execution of rustfmt, clippy and rustup-toolchain
-  should be skipped. If it is set to any value, they are skipped. This is used for avoiding
-  infinite recursion in `./miri` and to allow automated IDE actions to avoid the auto ops.
+* `MIRI_AUTO_OPS` indicates whether the automatic execution of rustfmt, clippy and toolchain setup
+  should be skipped. If it is set to any value, they are skipped. This is used for avoiding infinite
+  recursion in `./miri` and to allow automated IDE actions to avoid the auto ops.
 * `MIRI_LOG`, `MIRI_BACKTRACE` control logging and backtrace printing during
   Miri executions, also [see "Testing the Miri driver" in `CONTRIBUTING.md`][testing-miri].
 * `MIRIFLAGS` (recognized by `cargo miri` and the test suite) defines extra

miri

@@ -51,6 +51,13 @@ in the Rust fork of the given user to upstream. It will also pull a copy of the
 rustc history into the Miri repo, unless you set the RUSTC_GIT env var to an
 existing clone of the rustc repo.
 
+./miri toolchain <commit> <flags>:
+Update and activate the rustup toolchain 'miri'. If no commit is given, updates
+to the commit given in the `rust-version` file. If the commit is `HEAD`, updates
+to the latest upstream rustc commit.
+`rustup-toolchain-install-master` must be installed for this to work. Any extra
+flags are passed to `rustup-toolchain-install-master`.
+
   ENVIRONMENT VARIABLES
 
 MIRI_SYSROOT:
@@ -75,6 +82,42 @@ JOSH_FILTER=":at_commit=75dd959a3a40eb5b4574f8d2e23aa6efbeb33573[:prefix=src/too
 
 ## Early commands, that don't do auto-things and don't want the environment-altering things happening below.
 case "$COMMAND" in
+toolchain)
+    cd "$MIRIDIR"
+    # Make sure rustup-toolchain-install-master is installed.
+    if ! which rustup-toolchain-install-master >/dev/null; then
+        echo "Please install rustup-toolchain-install-master by running 'cargo install rustup-toolchain-install-master'"
+        exit 1
+    fi
+    # Determine new commit.
+    if [[ "$1" == "" ]]; then
+        NEW_COMMIT=$(cat rust-version)
+    elif [[ "$1" == "HEAD" ]]; then
+        NEW_COMMIT=$(git ls-remote https://github.com/rust-lang/rust/ HEAD | cut -f 1)
+    else
+        NEW_COMMIT="$1"
+    fi
+    echo "$NEW_COMMIT" > rust-version
+    shift || true # don't fail if shifting fails because no commit was given
+    # Check if we already are at that commit.
+    CUR_COMMIT=$(rustc +miri --version -v 2>/dev/null | grep "^commit-hash: " | cut -d " " -f 2)
+    if [[ "$CUR_COMMIT" == "$NEW_COMMIT" ]]; then
+        echo "miri toolchain is already at commit $CUR_COMMIT."
+        rustup override set miri
+        exit 0
+    fi
+    # Install and setup new toolchain.
+    rustup toolchain uninstall miri
+    rustup-toolchain-install-master -n miri -c cargo -c rust-src -c rustc-dev -c llvm-tools -c rustfmt -c clippy "$@" -- "$NEW_COMMIT"
+    rustup override set miri
+    # Cleanup.
+    cargo clean
+    # Call 'cargo metadata' on the sources in case that changes the lockfile
+    # (which fails under some setups when it is done from inside vscode).
+    cargo metadata --format-version 1 --manifest-path "$(rustc --print sysroot)/lib/rustlib/rustc-src/rust/compiler/rustc/Cargo.toml" >/dev/null
+    # Done!
+    exit 0
+    ;;
 rustc-pull)
     cd "$MIRIDIR"
     git fetch http://localhost:8000/rust-lang/rust.git$JOSH_FILTER.git master
@@ -145,7 +188,7 @@ if [ -z "$MIRI_AUTO_OPS" ]; then
     # Run this first, so that the toolchain doesn't change after
     # other code has run.
     if [ -f "$MIRIDIR/.auto-everything" ] || [ -f "$MIRIDIR/.auto-toolchain" ] ; then
-        (cd "$MIRIDIR" && ./rustup-toolchain)
+        $0 toolchain
     fi
 
     if [ -f "$MIRIDIR/.auto-everything" ] || [ -f "$MIRIDIR/.auto-fmt" ] ; then

rust-version

@@ -1 +1 @@
-85d089b41e2a0c0f07ab34f6c5a7c451389f25e6
+607878d069267e1402ad792c9331b426e4c6d0f9