New doctest parameter allows us to disable documentation testing

There are some issues with documentation tests, see
taiki-e/cargo-llvm-cov#2 and
rust-lang/rust#79417

README.md

@@ -45,6 +45,7 @@ jobs:
 - `output_type`: output type, one of `html`, `text`, `json` or `lcov`.
 - `output_path`: output path.
 - `test_args`: arguments to pass to the test - `--nocapture` for example.
+- `doctest`: if `true` (the default) the documentation tests are also run.
 
 
 If neither `output_type` and `output_path` are defined, the action by

action.yml

@@ -16,6 +16,9 @@ inputs:
     default: ''
   test_args:
     description: Arguments to pass to the test
+  doctest:
+    description: Run documentation testing; true or false
+    default: true
 outputs:
   report:
     description: Name of report file, for compatibility with rust-grcov

entrypoint

@@ -25,6 +25,8 @@ if [ -n "$INPUT_OUTPUT_TYPE" ]; then
     OUTPUT_ARGS+=( "--$INPUT_OUTPUT_TYPE" )
 fi
 
+DOCTEST="${INPUT_DOCTEST:-true}"
+
 if [ -n "$INPUT_OUTPUT_PATH" ]; then
     OUTPUT_PATH="$INPUT_OUTPUT_PATH"
     OUTPUT_ARGS+=( --output-path "$OUTPUT_PATH" )
@@ -51,9 +53,16 @@ RUSTDOCFLAGS="$RUSTFLAGS"
 RUST_BACKTRACE=1
 
 cargo llvm-cov --workspace clean
+
+# Run regular test:
 cargo llvm-cov --workspace --all-features --no-fail-fast --no-report -- "${TEST_ARGS[@]}"
-cargo llvm-cov --workspace --all-features --no-fail-fast --no-report --doc -- "${TEST_ARGS[@]}"
+if [ "$DOCTEST" = "true" ]; then
+   # Run doc tests:
+   cargo llvm-cov --workspace --all-features --no-fail-fast --no-report --doc -- "${TEST_ARGS[@]}"
+fi
+# Generate report including doc tests:
 cargo llvm-cov --no-run --doctests "${OUTPUT_ARGS[@]}"
+# Print summary including doc tests:
 cargo llvm-cov --no-run --doctests
 
 if [ -n "$OUTPUT_PATH" ]; then