[auto-toolstate] Upload the toolstate result to an external git repository, and removes BuildExpectation

.travis.yml

@@ -179,13 +179,26 @@ matrix:
     - env: IMAGE=x86_64-gnu-incremental
       if: branch = auto
 
+    - stage: publish toolstate
+      if: branch = master AND type = push
+      before_install: []
+      install: []
+      cache: false
+      sudo: false
+      script:
+        MESSAGE_FILE=$(mktemp -t msg.XXXXXX);
+        . src/ci/docker/x86_64-gnu-tools/repo.sh;
+        commit_toolstate_change "$MESSAGE_FILE" "$TRAVIS_BUILD_DIR/src/tools/publish_toolstate.py" "$(git rev-parse HEAD)" "$(git log --format=%s -n1 HEAD)" "$MESSAGE_FILE"
+
 env:
   global:
     - SCCACHE_BUCKET=rust-lang-ci-sccache2
     - SCCACHE_REGION=us-west-1
     - AWS_ACCESS_KEY_ID=AKIAJAMV3QAMMA6AXHFQ
     # AWS_SECRET_ACCESS_KEY=...
     - secure: "j96XxTVOSUf4s4r4htIxn/fvIa5DWbMgLqWl7r8z2QfgUwscmkMXAwXuFNc7s7bGTpV/+CgDiMFFM6BAFLGKutytIF6oA02s9b+usQYnM0th7YQ2AIgm9GtMTJCJp4AoyfFmh8F2faUICBZlfVLUJ34udHEe35vOklix+0k4WDo="
+    # TOOLSTATE_REPO_ACCESS_TOKEN=...
+    - secure: "cFh8thThqEJLC98XKI5pfqflUzOlxsYPRW20AWRaYOOgYHPTiGWypTXiPbGSKaeAXTZoOA+DpQtEmefc0U6lt9dHc7a/MIaK6isFurjlnKYiLOeTruzyu1z7PWCeZ/jKXsU2RK/88DBtlNwfMdaMIeuKj14IVfpepPPL71ETbuk="
 
 before_install:
   - zcat $HOME/docker/rust-ci.tar.gz | docker load || true

CONTRIBUTING.md

@@ -369,26 +369,29 @@ Currently building Rust will also build the following external projects:
 
 * [clippy](https://github.com/rust-lang-nursery/rust-clippy)
 * [miri](https://github.com/solson/miri)
+* [rustfmt](https://github.com/rust-lang-nursery/rustfmt)
+* [rls](https://github.com/rust-lang-nursery/rls/)
 
-If your changes break one of these projects, you need to fix them by opening
-a pull request against the broken project asking to put the fix on a branch.
-Then you can disable the tool building via `src/tools/toolstate.toml`.
-Once the branch containing your fix is likely to be merged, you can point
-the affected submodule at this branch.
+We allow breakage of these tools in the nightly channel. Maintainers of these
+projects will be notified of the breakages and should fix them as soon as
+possible.
 
-Don't forget to also add your changes with
+After the external is fixed, one could add the changes with
 
-```
+```sh
 git add path/to/submodule
 ```
 
 outside the submodule.
 
-In order to prepare your PR, you can run the build locally by doing
+In order to prepare your tool-fixing PR, you can run the build locally by doing
 `./x.py build src/tools/TOOL`. If you will be editing the sources
 there, you may wish to set `submodules = false` in the `config.toml`
 to prevent `x.py` from resetting to the original branch.
 
+Breakage is not allowed in the beta and stable channels, and must be addressed
+before the PR is merged.
+
 #### Breaking Tools Built With The Compiler
 [breaking-tools-built-with-the-compiler]: #breaking-tools-built-with-the-compiler
 
@@ -406,12 +409,12 @@ tests.
 That means that, in the default state, you can't update the compiler without first
 fixing rustfmt, rls and the other tools that the compiler builds.
 
-Luckily, a feature was [added to Rust's build](https://github.com/rust-lang/rust/pull/45243)
-to make all of this easy to handle. The idea is that you mark the tools as "broken",
+Luckily, a feature was [added to Rust's build](https://github.com/rust-lang/rust/issues/45861)
+to make all of this easy to handle. The idea is that we allow these tools to be "broken",
 so that the rust-lang/rust build passes without trying to build them, then land the change
 in the compiler, wait for a nightly, and go update the tools that you broke. Once you're done
-and the tools are working again, you go back in the compiler and change the tools back
-from "broken".
+and the tools are working again, you go back in the compiler and update the tools
+so they can be distributed again.
 
 This should avoid a bunch of synchronization dances and is also much easier on contributors as
 there's no need to block on rls/rustfmt/other tools changes going upstream.
@@ -430,15 +433,10 @@ Here are those same steps in detail:
 4. (optional) Maintainers of these submodules will **not** merge the PR. The PR can't be
    merged because CI will be broken. You'll want to write a message on the PR referencing
    your change, and how the PR should be merged once your change makes it into a nightly.
-5. Update `src/tools/toolstate.toml` to indicate that the tool in question is "broken",
-   that will disable building it on CI. See the documentation in that file for the exact
-   configuration values you can use.
-6. Commit the changes to `src/tools/toolstate.toml`, **do not update submodules in your commit**,
-   and then update the PR you have for rust-lang/rust.
-7. Wait for your PR to merge.
-8. Wait for a nightly
-9. (optional) Help land your PR on the upstream repository now that your changes are in nightly.
-10. (optional) Send a PR to rust-lang/rust updating the submodule, reverting `src/tools/toolstate.toml` back to a "building" or "testing" state.
+5. Wait for your PR to merge.
+6. Wait for a nightly
+7. (optional) Help land your PR on the upstream repository now that your changes are in nightly.
+8. (optional) Send a PR to rust-lang/rust updating the submodule.
 
 #### Updating submodules
 [updating-submodules]: #updating-submodules

appveyor.yml

@@ -5,6 +5,8 @@ environment:
   AWS_SECRET_ACCESS_KEY:
     secure: 7Y+JiquYedOAgnUU26uL0DPzrxmTtR+qIwG6rNKSuWDffqU3vVZxbGXim9QpTO80
   SCCACHE_DIGEST: f808afabb4a4eb1d7112bcb3fa6be03b61e93412890c88e177c667eb37f46353d7ec294e559b16f9f4b5e894f2185fe7670a0df15fd064889ecbd80f0c34166c
+  TOOLSTATE_REPO_ACCESS_TOKEN:
+    secure: PTZiSxJMVUZ0VnMR5i13E4OagbXfglj7pcskDQiKufVrDm13mLoI0vDJAEM35+bY
 
   # By default schannel checks revocation of certificates unlike some other SSL
   # backends, but we've historically had problems on CI where a revocation
@@ -27,8 +29,8 @@ environment:
 
   # MSVC tools tests
   - MSYS_BITS: 64
-    SCRIPT: src/ci/docker/x86_64-gnu-tools/checktools.sh x.py toolstates.json
-    RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --save-toolstates=toolstates.json
+    SCRIPT: src/ci/docker/x86_64-gnu-tools/checktools.sh x.py /tmp/toolstates.json windows
+    RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --save-toolstates=/tmp/toolstates.json --enable-test-miri
 
   # 32/64-bit MinGW builds.
   #