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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Failed to generate compile_commands.json","articleBody":"I ran the command `bazel run @hedron_compile_commands//:refresh_all` on the latest commit (https://github.com/j2kun/mlir-tutorial/commit/bf40cc273cfa3b7f1ebbd53af7a5536f7276c349), and it failed to generate the `compile_commands.json` file. If I go back one commit, the `compile_commands.json` file is generated successfully.\n\nThe error when running the `bazel run` command at commit bf40cc27 is as follows:\n\n```\nINFO: Analyzed target @@hedron_compile_commands+//:refresh_all (4 packages loaded, 2013 targets configured).\nINFO: Found 1 target...\nTarget @@hedron_compile_commands+//:refresh_all up-to-date:\n  bazel-bin/external/hedron_compile_commands+/refresh_all\n  bazel-bin/external/hedron_compile_commands+/refresh_all.check_python_version.py\n  bazel-bin/external/hedron_compile_commands+/refresh_all.py\nINFO: Elapsed time: 1.648s, Critical Path: 0.38s\nINFO: 9 processes: 7 internal, 2 linux-sandbox.\nINFO: Build completed successfully, 9 total actions\nINFO: Running command line: bazel-bin/external/hedron_compile_commands+/refresh_all\n\u003e\u003e\u003e Automatically added entries to .git/info/exclude to gitignore generated output.\n\u003e\u003e\u003e Automatically added //external workspace link:\n    This link makes it easy for you--and for build tooling--to see the external dependencies you bring in. It also makes your source tree have the same directory structure as the build sandbox.\n    It's a win/win: It's easier for you to browse the code you use, and it eliminates whole categories of edge cases for build tooling.\n\u003e\u003e\u003e Analyzing commands used in @//...\nWARNING: Build options --features and --host_features have changed, discarding analysis cache (this can be expensive, see https://bazel.build/advanced/performance/iteration-speed).\n\u003e\u003e\u003e A source file you compile doesn't (yet) exist: bazel-out/k8-dbg/bin/external/+_repo_rules+llvm-project/clang/clang-driver.cpp\n    It's probably a generated file, and you haven't yet run a build to generate it.\n    That's OK; your code doesn't even have to compile for this tool to work.\n    If you can, though, you might want to run a build of your code with --keep_going.\n        That way everything possible is generated, browsable and indexed for autocomplete.\n    However, if you have *already* built your code, and generated the missing file...\n        Please make sure you're supplying this tool with the same flags you use to build.\n        You can either use a refresh_compile_commands rule or the special -- syntax. Please see the README.\n        [Supplying flags normally won't work. That just causes this tool to be built with those flags.]\n    Continuing gracefully...\nTraceback (most recent call last):\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/_main/../hedron_compile_commands+/refresh_all.check_python_version.py\", line 15, in \u003cmodule\u003e\n    refresh_all.main()\n    ~~~~~~~~~~~~~~~~^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/hedron_compile_commands+/refresh_all.py\", line 1420, in main\n    compile_command_entries.extend(_get_commands(target, flags))\n    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/hedron_compile_commands+/refresh_all.py\", line 1282, in _get_commands\n    yield from _convert_compile_commands(parsed_aquery_output)\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/hedron_compile_commands+/refresh_all.py\", line 1162, in _convert_compile_commands\n    for source_files, header_files, compile_command_args in outputs:\n                                                            ^^^^^^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/external/rules_python++python+python_3_13_x86_64-unknown-linux-gnu/lib/python3.13/concurrent/futures/_base.py\", line 619, in result_iterator\n    yield _result_or_cancel(fs.pop())\n          ~~~~~~~~~~~~~~~~~^^^^^^^^^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/external/rules_python++python+python_3_13_x86_64-unknown-linux-gnu/lib/python3.13/concurrent/futures/_base.py\", line 317, in _result_or_cancel\n    return fut.result(timeout)\n           ~~~~~~~~~~^^^^^^^^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/external/rules_python++python+python_3_13_x86_64-unknown-linux-gnu/lib/python3.13/concurrent/futures/_base.py\", line 449, in result\n    return self.__get_result()\n           ~~~~~~~~~~~~~~~~~^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/external/rules_python++python+python_3_13_x86_64-unknown-linux-gnu/lib/python3.13/concurrent/futures/_base.py\", line 401, in __get_result\n    raise self._exception\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/external/rules_python++python+python_3_13_x86_64-unknown-linux-gnu/lib/python3.13/concurrent/futures/thread.py\", line 59, in run\n    result = self.fn(*self.args, **self.kwargs)\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/hedron_compile_commands+/refresh_all.py\", line 1126, in _get_cpp_command_for_files\n    source_files, header_files = _get_files(compile_action)\n                                 ~~~~~~~~~~^^^^^^^^^^^^^^^^\n  File \"/home/oulongwu/.cache/bazel/_bazel_oulongwu/5ea27db1debab93ecb57f96e7870f4b6/execroot/_main/bazel-out/k8-dbg/bin/external/hedron_compile_commands+/refresh_all.runfiles/hedron_compile_commands+/refresh_all.py\", line 624, in _get_files\n    assert source_file_candidates, f\"No source files found in compile args: {compile_action.arguments}.\\nPlease file an issue with this information!\"\n           ^^^^^^^^^^^^^^^^^^^^^^\nAssertionError: 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', '-Wunused-but-set-parameter', '-Wno-free-nonheap-object', '-fno-omit-frame-pointer', '-g', '-std=c++17', '-MD', '-MF', 'bazel-out/k8-dbg/bin/external/abseil-cpp+/absl/base/_objs/base/call_once.h.d', '-iquote', 'external/abseil-cpp+', '-iquote', 'bazel-out/k8-dbg/bin/external/abseil-cpp+', '-fdiagnostics-color=always', '-std=c++17', '-Wall', '-Wextra', '-Wcast-qual', '-Wconversion-null', '-Wformat-security', '-Wmissing-declarations', '-Wnon-virtual-dtor', '-Woverlength-strings', '-Wpointer-arith', '-Wundef', '-Wunused-local-typedefs', '-Wunused-result', '-Wvarargs', '-Wvla', '-Wwrite-strings', '-DNOMINMAX', '-c', 'external/abseil-cpp+/absl/base/call_once.h', '-o', 'bazel-out/k8-dbg/bin/external/abseil-cpp+/absl/base/_objs/base/call_once.h.processed', '-Wno-builtin-macro-redefined', '-D__DATE__=\"redacted\"', '-D__TIMESTAMP__=\"redacted\"', '-D__TIME__=\"redacted\"'].\nPlease file an issue with this information!\n```","author":{"url":"https://github.com/xulongwu4","@type":"Person","name":"xulongwu4"},"datePublished":"2026-03-26T20:08:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/53/mlir-tutorial/issues/53"}