assert source_file_candidates fails

[a1exxd0]

Error found, asked to raise an issue

After running a bazel run :refresh_compile_commands I get:

"/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 626, in _get_files
    assert source_file_candidates, f"No source files found in compile args: {compile_action.arguments}.\nPlease file an issue with this information!"

My repository is publicly availaible here, branched at the point that causes the error. Reproduced by:

bazel build //... # the build works fine
bazel run :refresh_compile_commands

At this point I'm not too familiar with how this works, but happy to contribute a fix with a few pointers!

The error in full:

❯ bazel run :refresh_compile_commands
WARNING: Build options --features and --host_features have changed, discarding analysis cache (this can be expensive, see https://bazel.build/advanced/performance/iteration-speed).
INFO: Analyzed target //:refresh_compile_commands (2 packages loaded, 3176 targets configured).
INFO: Found 1 target...
Target //:refresh_compile_commands up-to-date:
  bazel-bin/refresh_compile_commands
  bazel-bin/refresh_compile_commands.check_python_version.py
  bazel-bin/refresh_compile_commands.py
INFO: Elapsed time: 1.266s, Critical Path: 0.52s
INFO: 4 processes: 9 action cache hit, 2 internal, 2 darwin-sandbox.
INFO: Build completed successfully, 4 total actions
INFO: Running command line: bazel-bin/refresh_compile_commands
>>> Analyzing commands used in //...
WARNING: Build options --features and --host_features have changed, discarding analysis cache (this can be expensive, see https://bazel.build/advanced/performance/iteration-speed).
Traceback (most recent call last):
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.check_python_version.py", line 15, in <module>
    refresh_compile_commands.main()
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 1416, in main
    compile_command_entries.extend(_get_commands(target, flags))
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 1278, in _get_commands
    yield from _convert_compile_commands(parsed_aquery_output)
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 1158, in _convert_compile_commands
    for source_files, header_files, compile_command_args in outputs:
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/external/rules_python++python+python_3_11_aarch64-apple-darwin/lib/python3.11/concurrent/futures/_base.py", line 619, in result_iterator
    yield _result_or_cancel(fs.pop())
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/external/rules_python++python+python_3_11_aarch64-apple-darwin/lib/python3.11/concurrent/futures/_base.py", line 317, in _result_or_cancel
    return fut.result(timeout)
           ^^^^^^^^^^^^^^^^^^^
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/external/rules_python++python+python_3_11_aarch64-apple-darwin/lib/python3.11/concurrent/futures/_base.py", line 449, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/external/rules_python++python+python_3_11_aarch64-apple-darwin/lib/python3.11/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/external/rules_python++python+python_3_11_aarch64-apple-darwin/lib/python3.11/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 1122, in _get_cpp_command_for_files
    source_files, header_files = _get_files(compile_action)
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/private/var/tmp/_bazel_alex/975cff4f4d663bb648ada73232e06de5/execroot/_main/bazel-out/darwin_arm64-fastbuild/bin/refresh_compile_commands.runfiles/_main/refresh_compile_commands.py", line 626, in _get_files
    assert source_file_candidates, f"No source files found in compile args: {compile_action.arguments}.\nPlease file an issue with this information!"
           ^^^^^^^^^^^^^^^^^^^^^^
AssertionError: No source files found in compile args: ['external/rules_cc++cc_configure_extension+local_config_cc/cc_wrapper.sh', '-xc++-header', '-fsyntax-only', '-U_FORTIFY_SOURCE', '-fstack-protector', '-Wall', '-Wthread-safety', '-Wself-assign', '-Wunused-but-set-parameter', '-Wno-free-nonheap-object', '-fcolor-diagnostics', '-fno-omit-frame-pointer', '-std=c++17', '-DBOOST_ALL_NO_LIB', '-DBOOST_ASIO_SEPARATE_COMPILATION', '-DBOOST_BEAST_SEPARATE_COMPILATION', '-mmacosx-version-min=13.3', '-MD', '-MF', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.beast+/_objs/boost.beast/beast.h.d', '-iquote', 'external/boost.beast+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.beast+', '-iquote', 'external/boost.asio+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.asio+', '-iquote', 'external/boost.align+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.align+', '-iquote', 'external/boost.assert+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.assert+', '-iquote', 'external/boost.config+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.config+', '-iquote', 'external/boost.core+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.core+', '-iquote', 'external/boost.static_assert+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.static_assert+', '-iquote', 'external/boost.throw_exception+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.throw_exception+', '-iquote', 'external/boost.context+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.context+', '-iquote', 'external/boost.mp11+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.mp11+', '-iquote', 'external/boost.pool+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.pool+', '-iquote', 'external/boost.integer+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.integer+', '-iquote', 'external/boost.type_traits+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.type_traits+', '-iquote', 'external/boost.winapi+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.winapi+', '-iquote', 'external/boost.predef+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.predef+', '-iquote', 'external/boost.smart_ptr+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.smart_ptr+', '-iquote', 'external/boost.date_time+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.date_time+', '-iquote', 'external/boost.algorithm+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.algorithm+', '-iquote', 'external/boost.array+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.array+', '-iquote', 'external/boost.bind+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.bind+', '-iquote', 'external/boost.concept_check+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.concept_check+', '-iquote', 'external/boost.preprocessor+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.preprocessor+', '-iquote', 'external/boost.exception+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.exception+', '-iquote', 'external/boost.tuple+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.tuple+', '-iquote', 'external/boost.function+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.function+', '-iquote', 'external/boost.iterator+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.iterator+', '-iquote', 'external/boost.detail+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.detail+', '-iquote', 'external/boost.fusion+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.fusion+', '-iquote', 'external/boost.container_hash+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.container_hash+', '-iquote', 'external/boost.describe+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.describe+', '-iquote', 'external/boost.function_types+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.function_types+', '-iquote', 'external/boost.mpl+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.mpl+', '-iquote', 'external/boost.utility+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.utility+', '-iquote', 'external/boost.io+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.io+', '-iquote', 'external/boost.functional+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.functional+', '-iquote', 'external/boost.typeof+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.typeof+', '-iquote', 'external/boost.optional+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.optional+', '-iquote', 'external/boost.range+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.range+', '-iquote', 'external/boost.conversion+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.conversion+', '-iquote', 'external/boost.regex+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.regex+', '-iquote', 'external/boost.unordered+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.unordered+', '-iquote', 'external/boost.lexical_cast+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.lexical_cast+', '-iquote', 'external/boost.container+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.container+', '-iquote', 'external/boost.intrusive+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.intrusive+', '-iquote', 'external/boost.move+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.move+', '-iquote', 'external/boost.numeric_conversion+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.numeric_conversion+', '-iquote', 'external/boost.tokenizer+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.tokenizer+', '-iquote', 'external/boost.system+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.system+', '-iquote', 'external/boost.variant2+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.variant2+', '-iquote', 'external/boost.endian+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.endian+', '-iquote', 'external/boost.logic+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.logic+', '-iquote', 'external/boost.static_string+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.static_string+', '-iquote', 'external/boost.type_index+', '-iquote', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.type_index+', '-isystem', 'external/boost.beast+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.beast+/include', '-isystem', 'external/boost.asio+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.asio+/include', '-isystem', 'external/boost.align+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.align+/include', '-isystem', 'external/boost.assert+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.assert+/include', '-isystem', 'external/boost.config+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.config+/include', '-isystem', 'external/boost.core+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.core+/include', '-isystem', 'external/boost.static_assert+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.static_assert+/include', '-isystem', 'external/boost.throw_exception+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.throw_exception+/include', '-isystem', 'external/boost.context+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.context+/include', '-isystem', 'external/boost.mp11+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.mp11+/include', '-isystem', 'external/boost.pool+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.pool+/include', '-isystem', 'external/boost.integer+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.integer+/include', '-isystem', 'external/boost.type_traits+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.type_traits+/include', '-isystem', 'external/boost.winapi+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.winapi+/include', '-isystem', 'external/boost.predef+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.predef+/include', '-isystem', 'external/boost.smart_ptr+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.smart_ptr+/include', '-isystem', 'external/boost.date_time+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.date_time+/include', '-isystem', 'external/boost.algorithm+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.algorithm+/include', '-isystem', 'external/boost.array+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.array+/include', '-isystem', 'external/boost.bind+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.bind+/include', '-isystem', 'external/boost.concept_check+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.concept_check+/include', '-isystem', 'external/boost.preprocessor+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.preprocessor+/include', '-isystem', 'external/boost.exception+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.exception+/include', '-isystem', 'external/boost.tuple+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.tuple+/include', '-isystem', 'external/boost.function+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.function+/include', '-isystem', 'external/boost.iterator+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.iterator+/include', '-isystem', 'external/boost.detail+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.detail+/include', '-isystem', 'external/boost.fusion+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.fusion+/include', '-isystem', 'external/boost.container_hash+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.container_hash+/include', '-isystem', 'external/boost.describe+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.describe+/include', '-isystem', 'external/boost.function_types+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.function_types+/include', '-isystem', 'external/boost.mpl+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.mpl+/include', '-isystem', 'external/boost.utility+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.utility+/include', '-isystem', 'external/boost.io+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.io+/include', '-isystem', 'external/boost.functional+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.functional+/include', '-isystem', 'external/boost.typeof+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.typeof+/include', '-isystem', 'external/boost.optional+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.optional+/include', '-isystem', 'external/boost.range+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.range+/include', '-isystem', 'external/boost.conversion+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.conversion+/include', '-isystem', 'external/boost.regex+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.regex+/include', '-isystem', 'external/boost.unordered+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.unordered+/include', '-isystem', 'external/boost.lexical_cast+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.lexical_cast+/include', '-isystem', 'external/boost.container+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.container+/include', '-isystem', 'external/boost.intrusive+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.intrusive+/include', '-isystem', 'external/boost.move+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.move+/include', '-isystem', 'external/boost.numeric_conversion+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.numeric_conversion+/include', '-isystem', 'external/boost.tokenizer+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.tokenizer+/include', '-isystem', 'external/boost.system+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.system+/include', '-isystem', 'external/boost.variant2+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.variant2+/include', '-isystem', 'external/boost.endian+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.endian+/include', '-isystem', 'external/boost.logic+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.logic+/include', '-isystem', 'external/boost.static_string+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.static_string+/include', '-isystem', 'external/boost.type_index+/include', '-isystem', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.type_index+/include', '-std=c++23', '-c', 'external/boost.beast+/include/boost/beast.hpp', '-o', 'bazel-out/darwin_arm64-fastbuild/bin/external/boost.beast+/_objs/boost.beast/beast.h.processed', '-no-canonical-prefixes', '-Wno-builtin-macro-redefined', '-D__DATE__="redacted"', '-D__TIMESTAMP__="redacted"', '-D__TIME__="redacted"'].
Please file an issue with this information!

[a1exxd0]

Could be because we should be skipping the boost precompile action? when we compile with -xc++-header there is no c++ source file, just the header itself

but by naming i presume the assert source_file_candidates is failing because the file being compiled is not a cpp file so there are no candidates (near to the end of the last command it mentions 'external/boost.beast+/include/boost/beast.hpp')

again i'd love to contribute a fix! let me know if that's possible :)