Various environment variables-related cleanup #220
Merged
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Support relative path in
CARGO_LLVM_COV_TARGET_DIR
.Add
LLVM_COV_FLAGS
/LLVM_PROFDATA_FLAGS
environment variables to pass additional flags to llvm-cov/llvm-profdata in a space-separated list.Deprecate
CARGO_LLVM_COV_FLAGS
/CARGO_LLVM_PROFDATA_FLAGS
environment variables instead ofLLVM_COV_FLAGS
/LLVM_PROFDATA_FLAGS
environment variables.Document environment variables that cargo-llvm-cov reads.