TypeError: 'set' object does not support indexing

[janisozaur]

Using 13e0a6ba0111b6b with Python 3.7.1 on a following (redacted, simplified, but roughly the same) compile_commands.json, I get following error:

$ json2cmake      
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
Traceback (most recent call last):
  File "/home/janisozaur/.local/bin/json2cmake", line 10, in <module>
    sys.exit(main())
  File "/home/janisozaur/.local/lib/python3.7/site-packages/json2cmake/__init__.py", line 223, in main
    database.write(args.outfile, name=args.name)
  File "/home/janisozaur/.local/lib/python3.7/site-packages/json2cmake/__init__.py", line 122, in write
    name = os.path.basename(os.path.commonprefix(files).rstrip("/_"))
  File "/usr/lib/python3.7/genericpath.py", line 76, in commonprefix
    if not isinstance(m[0], (list, tuple)):
TypeError: 'set' object does not support indexing

[
    {
        "arguments": [
            "/usr/bin/gcc",
            "-c",
            "-m64",
            "-fPIC",
            "-pipe",
            "-fno-strict-aliasing",
            "-Og",
            "-g",
            "-fno-omit-frame-pointer",
            "-I.",
            "-I../../include",
            "-o",
            "ccc.o",
            "../../../foo/bar_43/ccc.c"
        ],
        "directory": "/home/janisozaur/workspace/foo-build/bar_43",
        "file": "../../../foo/bar_43/ccc.c"
    },
    {
        "arguments": [
            "gcc",
            "-c",
            "-m64",
            "-I.",
            "-I../../include",
            "-fPIC",
            "-pipe",
            "-fno-strict-aliasing",
            "-Og",
            "-g",
            "-fno-omit-frame-pointer",
            "-o",
            "aaa.o",
            "../../../foo/bar_43/aaa.c"
        ],
        "directory": "/home/janisozaur/workspace/foo-build/bar_43",
        "file": "../../../foo/bar_43/aaa.c"
    },
    {
        "arguments": [
            "/usr/bin/gcc",
            "-c",
            "-m64",
            "-fPIC",
            "-pipe",
            "-fno-strict-aliasing",
            "-Og",
            "-g",
            "-fno-omit-frame-pointer",
            "-I.",
            "-I../../include",
            "-o",
            "bbb.o",
            "../../../foo/bar_43/bbb.c"
        ],
        "directory": "/home/janisozaur/workspace/foo-build/bar_43",
        "file": "../../../foo/bar_43/bbb.c"
    }
]

It looks like json2cmake is also looking for some git information, but in this case I built the project outside of the git clone.

[pvbouwel]

Encountered this as well.

Seems like the commonprefix (used at init.py:122) does not like the files that are submitted which is a set. Changing the line to:

            name = os.path.basename(os.path.commonprefix(list(files)).rstrip("/_"))

Avoids the error.

[ngbrown]

Closed by #32, but it has not been released to PyPI yet.