switch coverage from tarpaulin to llvm-cov

tests/coverage.sh

@@ -1,29 +1,61 @@
 #!/bin/bash -e
 #
-# script to run projects tests and report code coverage
-#
-# uses tarpaulin (https://crates.io/crates/cargo-tarpaulin)
-#
-# other coverage solutions exist but all require rust nightly and the project
-# does not build with nightly at the moment
-
-# install tarpaulin if missing
-cargo tarpaulin --help >/dev/null 2>&1 || cargo install cargo-tarpaulin
-
-# run tests
-# --skip-clean to avoid re-building everything each time
-cargo tarpaulin \
-    --count \
-    --line \
-    --locked \
-    --skip-clean \
-    --ignore-tests \
-    --exclude-files rgb-lib-ffi/ \
-    --exclude-files tests/ \
-    --exclude-files src/wallet/test/ \
-    --out Html \
-        -- \
-        --test-threads=1
-
-# open the html test report in the default browser
-xdg-open tarpaulin-report.html
+# script to run project tests and report code coverage
+# uses llvm-cov (https://github.com/taiki-e/cargo-llvm-cov)
+
+LLVM_COV_OPTS=""
+CARGO_TEST_OPTS=""
+
+_die() {
+    echo "err $*"
+    exit 1
+}
+
+_tit() {
+    echo
+    echo "========================================"
+    echo "$@"
+    echo "========================================"
+}
+
+help() {
+    echo "$NAME [-h|--help] [-t|--test] [--no-clean]"
+    echo ""
+    echo "options:"
+    echo "    -h --help     show this help message"
+    echo "    -t --test     only run these test(s)"
+    echo "       --no-clean don't cleanup before the run"
+}
+
+# cmdline arguments
+while [ -n "$1" ]; do
+    case $1 in
+        -h|--help)
+            help
+            exit 0
+            ;;
+        -t|--test)
+            CARGO_TEST_OPTS="-- $2"
+            shift
+            ;;
+        --no-clean)
+            LLVM_COV_OPTS="$1"
+            ;;
+        *)
+            help
+            _die "unsupported argument \"$1\""
+            ;;
+    esac
+    shift
+done
+
+_tit "installing requirements"
+rustup component add llvm-tools-preview
+cargo install cargo-llvm-cov
+
+_tit "generating coverage report"
+# shellcheck disable=2086
+cargo llvm-cov --html $LLVM_COV_OPTS $CARGO_TEST_OPTS
+
+## show html report location
+echo "generated html report: target/llvm-cov/html/index.html"