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Richard SmithandJon Ross-Perkins
66caff2c26
Instead of crashing when run outside of `bazel`, make the toolchain's `file_test` binary work properly when no test-specific environment variables are set. This makes it a lot easier to run `file_test` under a debugger. There are two main changes here: - Don't crash if `$TEST_TMPDIR` is unset. Instead, fall back to LLVM's temporary directory (typically `$TMPDIR`). We already did this in some places in tests. We now do it in more places. - Don't fall back to a target label of `<target>` in the reproduction commands if `$TEST_TARGET` is unset, because this causes all the tests to fail because their output doesn't match the expected output due to a differing bazel run command. Instead explicitly specify the target from the `FileTestBase`-derived class. Infrastructure for this has been added generally, but only rolled out to the toolchain `file_test` binary for now. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>