66 lines
2.2 KiB
Python
Executable File
66 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python
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import os, sys, shutil, pathlib
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from fuse import FUSE, FuseOSError, Operations
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class FilterFS(Operations):
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def __init__(self, source, cache):
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self.source = source
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self.cache = cache
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def _original(self, path):
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print(path)
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p = os.path.join(self.source, path.lstrip('/'))
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if os.path.islink(p):
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rl = os.readlink(p)
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if rl.startswith('/!/'):
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cached_output = os.path.join(self.cache, path.lstrip('/'))
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if not os.path.exists(cached_output):
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rl = rl[3:]
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d = os.path.dirname(p)
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# begin hack
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old_cwd = os.getcwd()
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os.chdir(d)
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os.system(rl)
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os.chdir(old_cwd)
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pathlib.Path(os.path.dirname(cached_output)).mkdir(parents = True, exist_ok = True)
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shutil.move(os.path.join(d, 'out'), cached_output)
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# end hack
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p = cached_output
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return p
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# directory
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def readdir(self, path, fh):
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yield '.'
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yield '..'
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if os.path.isdir(self._original(path)):
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for d in os.listdir(self._original(path)):
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yield d
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# directory, file etc.
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def getattr(self, path, file_handle = None):
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st = os.lstat(self._original(path))
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return {
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'st_mode': st.st_mode, # 0o100775 file, 0o40775 dir
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#'st_ino': 42,
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#'st_dev': 123,
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'st_nlink': st.st_nlink,
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'st_uid': st.st_uid,
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'st_gid': st.st_gid,
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'st_size': st.st_size,
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'st_atime': st.st_atime,
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'st_mtime': st.st_mtime,
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'st_ctime': st.st_ctime,
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}
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# file
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def open(self, path, flags):
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return os.open(self._original(path), flags)
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def read(self, path, length, offset, file_handle):
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os.lseek(file_handle, offset, os.SEEK_SET)
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return os.read(file_handle, length)
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def main(source, cache, mountpoint):
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FUSE(FilterFS(source, cache), mountpoint, nothreads=True, foreground=True)
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if __name__ == '__main__':
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main(sys.argv[1], sys.argv[2], sys.argv[3]) |