Re-add codecov to get coverage reports

.github/workflows/coverage.yaml

@@ -1,40 +1,50 @@
-on:
-  push:
-    branches:
-      - '!trying'
-      - '!trying.tmp'
-      - '!staging'
-      - '!staging.tmp'
-
 name: Coverage
 
 env:
   RUST_BACKTRACE: 1
   RUSTFLAGS: "-Ccodegen-units=1 -Clink-dead-code -Coverflow-checks=off"
 
-jobs:
-  coverage:
-    name: Coverage
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: 1.63
-      - name: Install LLVM (Linux)
-        run: |
-          curl --proto '=https' --tlsv1.2 -sSf https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz -L -o llvm.tar.xz
-          mkdir -p /opt/llvm-10
-          tar xf llvm.tar.xz --strip-components=1 -C /opt/llvm-10
-          echo '/opt/llvm-10/bin' >> $GITHUB_PATH
-          echo 'LLVM_SYS_100_PREFIX=/opt/llvm-10' >> $GITHUB_ENV
-      - name: Generate Coverage Report
-        run: |
-          cargo install cargo-tarpaulin
-          cargo tarpaulin --forward --release -t120 --out Xml --ignore-tests --workspace --exclude wasmer-wasi-experimental-io-devices --exclude wasmer-c-api -- --skip traps:: --skip spec::linking --test-threads=1
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          file: ./cobertura.xml
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'master'
+      - 'staging'
+      - 'trying'
+    paths:
+      - 'lib/**'
+    tags:
+      # this is _not_ a regex, see: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet
+      - '[0-9]+.[0-9]+.[0-9]+*'
+  pull_request:
+    paths:
+      - 'lib/**'
+
+coverage:
+  runs-on: ubuntu-latest
+  env:
+    CARGO_TERM_COLOR: always
+  steps:
+    - uses: actions/checkout@v3
+    - name: Install Rust
+      run: rustup update stable
+    - name: Install LLVM (Linux)
+      run: |
+        curl --proto '=https' --tlsv1.2 -sSf https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-18.04.tar.xz -L -o llvm.tar.xz
+        mkdir -p /opt/llvm-10
+        tar xf llvm.tar.xz --strip-components=1 -C /opt/llvm-10
+        echo '/opt/llvm-10/bin' >> $GITHUB_PATH
+        echo 'LLVM_SYS_100_PREFIX=/opt/llvm-10' >> $GITHUB_ENV
+    - name: Install cargo-llvm-cov
+      uses: taiki-e/install-action@cargo-llvm-cov
+    - name: Generate code coverage
+      run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
+      env:
+        WAPM_DEV_TOKEN: ${{ secrets.WAPM_DEV_TOKEN }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        files: lcov.info
+        fail_ci_if_error: true
+