| # Copyright: 2005 Gentoo Foundation |
| # Author(s): Brian Harring (ferringb@gentoo.org) |
| # License: GPL2 |
| # $Id$ |
| |
| from portage.cache import fs_template |
| from portage.cache import cache_errors |
| import errno, os, stat |
| from portage.cache.template import reconstruct_eclasses |
| # store the current key order *here*. |
| class database(fs_template.FsBased): |
| |
| autocommits = True |
| |
| def __init__(self, *args, **config): |
| super(database,self).__init__(*args, **config) |
| self.location = os.path.join(self.location, |
| self.label.lstrip(os.path.sep).rstrip(os.path.sep)) |
| write_keys = set(self._known_keys) |
| write_keys.add("_eclasses_") |
| self._write_keys = sorted(write_keys) |
| if not self.readonly and not os.path.exists(self.location): |
| self._ensure_dirs() |
| |
| def __getitem__(self, cpv): |
| fp = os.path.join(self.location, cpv) |
| try: |
| myf = open(fp, "r") |
| try: |
| d = self._parse_data(myf, cpv) |
| if "_mtime_" not in d: |
| """Backward compatibility with old cache that uses mtime |
| mangling.""" |
| d["_mtime_"] = long(os.fstat(myf.fileno()).st_mtime) |
| return d |
| finally: |
| myf.close() |
| except (IOError, OSError), e: |
| if e.errno != errno.ENOENT: |
| raise cache_errors.CacheCorruption(cpv, e) |
| raise KeyError(cpv) |
| |
| def _parse_data(self, data, cpv): |
| try: |
| d = dict(map(lambda x:x.rstrip("\n").split("=", 1), data)) |
| except ValueError, e: |
| # If a line is missing an "=", the split length is 1 instead of 2. |
| raise cache_errors.CacheCorruption(cpv, e) |
| if "_eclasses_" in d: |
| d["_eclasses_"] = reconstruct_eclasses(cpv, d["_eclasses_"]) |
| else: |
| d["_eclasses_"] = {} |
| return d |
| |
| for x in self._known_keys: |
| if x not in d: |
| d[x] = '' |
| |
| |
| return d |
| |
| |
| def _setitem(self, cpv, values): |
| # import pdb;pdb.set_trace() |
| s = cpv.rfind("/") |
| fp = os.path.join(self.location,cpv[:s],".update.%i.%s" % (os.getpid(), cpv[s+1:])) |
| try: myf=open(fp, "w") |
| except (IOError, OSError), e: |
| if errno.ENOENT == e.errno: |
| try: |
| self._ensure_dirs(cpv) |
| myf=open(fp,"w") |
| except (OSError, IOError),e: |
| raise cache_errors.CacheCorruption(cpv, e) |
| else: |
| raise cache_errors.CacheCorruption(cpv, e) |
| |
| try: |
| for k in self._write_keys: |
| v = values.get(k) |
| if not v: |
| continue |
| myf.write("%s=%s\n" % (k, v)) |
| finally: |
| myf.close() |
| self._ensure_access(fp, mtime=values["_mtime_"]) |
| |
| #update written. now we move it. |
| |
| new_fp = os.path.join(self.location,cpv) |
| try: os.rename(fp, new_fp) |
| except (OSError, IOError), e: |
| os.remove(fp) |
| raise cache_errors.CacheCorruption(cpv, e) |
| |
| |
| def _delitem(self, cpv): |
| # import pdb;pdb.set_trace() |
| try: |
| os.remove(os.path.join(self.location,cpv)) |
| except OSError, e: |
| if errno.ENOENT == e.errno: |
| raise KeyError(cpv) |
| else: |
| raise cache_errors.CacheCorruption(cpv, e) |
| |
| |
| def __contains__(self, cpv): |
| return os.path.exists(os.path.join(self.location, cpv)) |
| |
| |
| def __iter__(self): |
| """generator for walking the dir struct""" |
| dirs = [self.location] |
| len_base = len(self.location) |
| while len(dirs): |
| try: |
| dir_list = os.listdir(dirs[0]) |
| except OSError, e: |
| if e.errno != errno.ENOENT: |
| raise |
| del e |
| dirs.pop(0) |
| continue |
| for l in dir_list: |
| if l.endswith(".cpickle"): |
| continue |
| p = os.path.join(dirs[0],l) |
| st = os.lstat(p) |
| if stat.S_ISDIR(st.st_mode): |
| dirs.append(p) |
| continue |
| yield p[len_base+1:] |
| dirs.pop(0) |
| |