adding a new script with in_disk_env var

scripts/coverage-in-disk.sh

@@ -0,0 +1,129 @@
+#!/usr/bin/env bash
+#
+# Runs all tests and collects code coverage
+#
+# Warning: this process is a little slow
+#
+
+if ! command -v grcov; then
+  echo "Error: grcov not found.  Try |cargo install grcov|"
+  exit 1
+fi
+
+if [[ ! "$(grcov --version)" =~ 0.8.[0-9] ]]; then
+  echo Error: Required grcov version not installed
+
+  echo "Installed version: $(grcov --version)"
+  exit 1
+fi
+
+set -e
+cd "$(dirname "$0")/.."
+source ci/_
+
+cargo="$(readlink -f "./cargo")"
+
+: "${CI_COMMIT:=local}"
+reportName="lcov-${CI_COMMIT:0:9}"
+
+if [[ -z $1 ]]; then
+  packages=(--lib --all --exclude solana-local-cluster)
+else
+  packages=("$@")
+fi
+
+coverageFlags=()
+coverageFlags+=(-Zprofile)               # Enable coverage
+coverageFlags+=("-Aincomplete_features") # Supress warnings due to frozen abi, which is harmless for it
+if [[ $(uname) != Darwin ]]; then        # macOS skipped due to https://github.com/rust-lang/rust/issues/63047
+  coverageFlags+=("-Clink-dead-code")    # Dead code should appear red in the report
+fi
+coverageFlags+=("-Ccodegen-units=1")     # Disable code generation parallelism which is unsupported under -Zprofile (see [rustc issue #51705]).
+coverageFlags+=("-Cinline-threshold=0")  # Disable inlining, which complicates control flow.
+coverageFlags+=("-Copt-level=0")
+coverageFlags+=("-Coverflow-checks=off") # Disable overflow checks, which create unnecessary branches.
+
+export RUSTFLAGS="${coverageFlags[*]} $RUSTFLAGS"
+export CARGO_INCREMENTAL=0
+export RUST_BACKTRACE=1
+export RUST_MIN_STACK=8388608
+export SOLANA_TEST_ACCOUNTS_INDEX_MEMORY_LIMIT_MB=10000 
+
+echo "--- remove old coverage results"
+if [[ -d target/cov ]]; then
+  find target/cov -type f -name '*.gcda' -delete
+fi
+rm -rf target/cov/$reportName
+mkdir -p target/cov
+
+# Mark the base time for a clean room dir
+touch target/cov/before-test
+
+# Force rebuild of possibly-cached proc macro crates and build.rs because
+# we always want stable coverage for them
+# Don't support odd file names in our repo ever
+if [[ -n $CI || -z $1 ]]; then
+  # shellcheck disable=SC2046
+  touch \
+    $(git ls-files :**/build.rs) \
+    $(git grep -l "proc-macro.*true" :**/Cargo.toml | sed 's|Cargo.toml|src/lib.rs|')
+fi
+
+# limit jobs to 4gb/thread
+JOBS=$(grep MemTotal /proc/meminfo | awk '{printf "%.0f", ($2 / (4 * 1024 * 1024))}')
+NPROC=$(nproc)
+JOBS=$((JOBS>NPROC ? NPROC : JOBS))
+
+RUST_LOG=solana=trace _ "$cargo" nightly test --jobs "$JOBS" --target-dir target/cov --no-run "${packages[@]}"
+if RUST_LOG=solana=trace _ "$cargo" nightly test --jobs "$JOBS" --target-dir target/cov "${packages[@]}" 2> target/cov/coverage-stderr.log; then
+  test_status=0
+else
+  test_status=$?
+  echo "Failed: $test_status"
+  echo "^^^ +++"
+  if [[ -n $CI ]]; then
+    exit $test_status
+  fi
+fi
+touch target/cov/after-test
+
+echo "--- grcov"
+
+# Create a clean room dir only with updated gcda/gcno files for this run,
+# because our cached target dir is full of other builds' coverage files
+rm -rf target/cov/tmp
+mkdir -p target/cov/tmp
+
+# Can't use a simpler construct under the condition of SC2044 and bash 3
+# (macOS's default). See: https://github.com/koalaman/shellcheck/wiki/SC2044
+find target/cov -type f -name '*.gcda' -newer target/cov/before-test ! -newer target/cov/after-test -print0 |
+  (while IFS= read -r -d '' gcda_file; do
+    gcno_file="${gcda_file%.gcda}.gcno"
+    ln -sf "../../../$gcda_file" "target/cov/tmp/$(basename "$gcda_file")"
+    ln -sf "../../../$gcno_file" "target/cov/tmp/$(basename "$gcno_file")"
+  done)
+
+(
+  grcov_args=(
+    target/cov/tmp
+    --llvm
+    --ignore \*.cargo\*
+    --ignore \*build.rs
+    --ignore bench-tps\*
+    --ignore upload-perf\*
+    --ignore bench-streamer\*
+    --ignore local-cluster\*
+  )
+
+  set -x
+  grcov "${grcov_args[@]}" -t html -o target/cov/$reportName
+  grcov "${grcov_args[@]}" -t lcov -o target/cov/lcov.info
+
+  cd target/cov
+  tar zcf report.tar.gz $reportName
+)
+
+ls -l target/cov/$reportName/index.html
+ln -sfT $reportName target/cov/LATEST
+
+exit $test_status