Add bors to CI (#1684)

This Pull Request updates some of our CI config and adds config for bors.


It changes the following:

- remove `cargo check` from CI (`cargo test` should be enough)
- change back to `cargo tarpaulin` on Linux to get coverage information 
- simplify some of the CI steps' names
- add workflow for bors

##### Working with bors

It's setup so that we need 2 approvals before we can merge like we discussed in Discord.

After the second approval we can write a comment with `bors r+` so that the merge is tested.

bors will only run if `test`, `rustfmt`, `clippy`, `examples` and `doc` are all running error free in the PR's branch. It will then run them again in a `staging` branch that is the equivalent of merging the PR on `main`.

Another option we can consider is `up_to_date_approvals`, so that new commits make previous approvals not count.

The bors reference can be found here: https://bors.tech/documentation/

.github/workflows/bors.yml

@@ -0,0 +1,181 @@
+name: bors
+
+on:
+  push:
+    branches:
+      - staging
+      - trying
+
+jobs:
+  test_on_linux:
+    name: Tests on Linux
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: |
+            target
+            ~/.cargo/git
+            ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-test-${{ hashFiles('**/Cargo.lock') }}
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -v
+  test_vm_on_linux:
+    name: Tests on Linux with vm enabled
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: |
+            target
+            ~/.cargo/git
+            ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-test-${{ hashFiles('**/Cargo.lock') }}
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: ---package Boa --lib --features=vm -- vm --nocapture
+
+  test_on_windows:
+    name: Tests on Windows
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: target
+          key: ${{ runner.os }}-cargo-test-${{ hashFiles('**/Cargo.lock') }}
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -v
+
+  test_on_macos:
+    name: Tests on MacOS
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -v
+
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+          components: rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+          components: clippy
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: |
+            target
+            ~/.cargo/git
+            ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-clippy-${{ hashFiles('**/Cargo.lock') }}
+      - uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- --verbose
+
+  examples:
+    name: Examples
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: |
+            target
+            ~/.cargo/git
+            ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-examples-${{ hashFiles('**/Cargo.lock') }}
+      - name: Build examples
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --examples -v
+      - name: Run example classes
+        uses: actions-rs/cargo@v1
+        with:
+          command: run
+          args: --example classes
+
+  doc:
+    name: Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: actions-rs/toolchain@v1.0.7
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+      - name: Cache cargo
+        uses: actions/cache@v2.1.6
+        with:
+          path: |
+            target
+            ~/.cargo/git
+            ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-doc-${{ hashFiles('**/Cargo.lock') }}
+      - name: Generate documentation
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: -v --document-private-items

.github/workflows/rust.yml

@@ -9,66 +9,8 @@ on:
 name: Continuous integration
 
 jobs:
-  check_on_linux:
-    name: Check on Linux
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2.3.5
-      - uses: actions-rs/toolchain@v1.0.7
-        with:
-          toolchain: stable
-          override: true
-          profile: minimal
-      - name: Cache cargo
-        uses: actions/cache@v2.1.6
-        with:
-          path: |
-            target
-            ~/.cargo/git
-            ~/.cargo/registry
-          key: ${{ runner.os }}-cargo-check-${{ hashFiles('**/Cargo.lock') }}
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: -v
-
-  check_on_windows:
-    name: Check on Windows
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v2.3.5
-      - uses: actions-rs/toolchain@v1.0.7
-        with:
-          toolchain: stable
-          override: true
-          profile: minimal
-      - name: Cache cargo build
-        uses: actions/cache@v2.1.6
-        with:
-          path: target
-          key: ${{ runner.os }}-cargo-check-${{ hashFiles('**/Cargo.lock') }}
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: -v
-
-  check_on_macos:
-    name: Check on MacOS
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v2.3.5
-      - uses: actions-rs/toolchain@v1.0.7
-        with:
-          toolchain: stable
-          override: true
-          profile: minimal
-      - uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: -v
-
   test_on_linux:
-    name: Test Suite on Linux
+    name: Tests on Linux
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.5
@@ -85,19 +27,14 @@ jobs:
             ~/.cargo/git
             ~/.cargo/registry
           key: ${{ runner.os }}-cargo-test-${{ hashFiles('**/Cargo.lock') }}
-      - uses: actions-rs/cargo@v1
+      - name: Run cargo-tarpaulin
+        uses: actions-rs/tarpaulin@v0.1
         with:
-          command: test
-          args: -v
-      # Waiting for https://github.com/rust-lang/cargo/pull/9229 to land
-      # - name: Run cargo-tarpaulin
-      #   uses: actions-rs/tarpaulin@v0.1
-      #   with:
-      #     args: --ignore-tests
-      # - name: Upload to codecov.io
-      #   uses: codecov/codecov-action@v1
+          args: --ignore-tests
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v1
   test_vm_on_linux:
-    name: Test VM on Linux
+    name: Tests on Linux with vm enabled
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.5
@@ -120,7 +57,7 @@ jobs:
           args: ---package Boa --lib --features=vm -- vm --nocapture
 
   test_on_windows:
-    name: Test Suite on Windows
+    name: Tests on Windows
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v2.3.5
@@ -140,7 +77,7 @@ jobs:
           args: -v
 
   test_on_macos:
-    name: Test Suite on MacOS
+    name: Tests on MacOS
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2.3.5
@@ -224,7 +161,7 @@ jobs:
           args: --example classes
 
   doc:
-    name: Documentation check
+    name: Documentation
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.5

bors.toml

@@ -0,0 +1,26 @@
+# docs https://bors.tech/documentation/
+status = [
+	"Tests on Linux",
+	"Tests on Linux with vm enabled",
+	"Tests on Windows",
+	"Tests on MacOS",
+	"Rustfmt",
+	"Clippy",
+	"Examples",
+	"Documentation",
+]
+pr_status = [
+	"Tests on Linux",
+	"Tests on Linux with vm enabled",
+	"Tests on Windows",
+	"Tests on MacOS",
+	"Rustfmt",
+	"Clippy",
+	"Examples",
+	"Documentation",
+]
+block_labels = [ "blocked" ]
+required_approvals = 2
+delete_merged_branches = true
+use_squash_merge = true
+update_base_for_deletes = true