More work on xattr support

fs/base.py

@@ -36,6 +36,7 @@ error_msgs = {
     "GETSIZE_FAILED" :      "Unable to retrieve size of resource: %(path)s",
     "COPYFILE_FAILED" :     "Unable to copy file: %(path)s",
     "READ_FAILED" :         "Unable to read from file: %(path)s",
+    "XATTR_FAILED" :        "Unable to access extended-attribute: %(path)s",
 
     # NoSysPathError
     "NO_SYS_PATH" :     "No mapping to OS filesytem: %(path)s,",
@@ -621,10 +622,10 @@ class FS(object):
 
     def _get_attr_path(self, path):
         if self.isdir(path):
-            return pathjoin(path, '.dirattrs')
+            return pathjoin(path, '.dirxattrs')
         else:
             dir_path, file_path = pathsplit(path)
-            return pathjoin(path, '.attrs.'+file_path)
+            return pathjoin(dir_path, '.xattrs.'+file_path)
 
     def _get_attr_dict(self, path):
         attr_path = self._get_attr_path(path)
@@ -633,27 +634,38 @@ class FS(object):
         else:
             return {}
 
-
     def _set_attr_dict(self, path, attrs):
         attr_path = self._get_attr_path(path)
-        self.setcontents(path, self.pickle.dumps(attrs))
+        self.setcontents(self._get_attr_path(path), pickle.dumps(attrs))
 
-    def setattr(self, path, key, value):
+    def setxattr(self, path, key, value):
         attrs = self._get_attr_dict(path)
         attrs[key] = value
         self._set_attr_dict(path, attrs)
 
-    def getattr(self, path, key, default):
-        return self._get_attr_dict(path).get(key, default)
+    def getxattr(self, path, key, default):
+        attrs = self._get_attr_dict(path)
+        return attrs.get(key, default)
 
-    def removeattr(self, path, key):
-        attrs = self._get_attrs()
-        if path in self._get_attrs():
+    def removexattr(self, path, key):
+        attrs = self._get_attr_dict(path)
+        try:
             del attrs[key]
+        except KeyError:
+            pass
+        self._set_attr_dict(path, attrs)
 
-    def listattrs(self, path):
+    def listxattrs(self, path):
+        attrs = self._get_attr_dict(path)
         return self._get_attr_dict(path).keys()
 
+    def updatexattrs(self, path, update_dict):
+        d = self._get_attr_dict()
+        d.update( dict([(k, v) for k,v in update_dict.iteritems()]) )
+        self.set_attr_dict(self, path, d)
+
+    def getxattrs(self, path):
+        return dict( [(k, self.getxattr(path, k)) for k in self.listxattrs(path)] )
 
     def movedir(self, src, dst, overwrite=False, ignore_errors=False, chunk_size=16384):
         """Moves a directory from one location to another.

fs/osfs.py

@@ -3,6 +3,11 @@
 from base import *
 from helpers import *
 
+try:
+    import xattr
+except ImportError:
+    xattr = None
+
 class OSFS(FS):
 
     """The most basic of filesystems. Simply shadows the underlaying filesytem
@@ -171,39 +176,122 @@ class OSFS(FS):
         return stats.st_size
 
 
+    def setxattr(self, path, key, value):
+        self._lock.acquire()
+        try:
+            if xattr is None:
+                return FS.setxattr(self, path, key, value)
+            try:
+                xattr.xattr(self.getsyspath(path))[key]=value
+            except IOError, e:
+                if e.errno == 95:
+                    return FS.setxattr(self, path, key, value)
+                else:
+                    raise OperationFailedError('XATTR_FAILED', path, details=e)
+        finally:
+            self._lock.release()
 
-if __name__ == "__main__":
-
-    osfs = OSFS("~/projects")
-
-
-    for p in osfs.walk("tagging-trunk", search='depth'):
-        print p
-
-    import browsewin
-    browsewin.browse(osfs)
-
-    print_fs(osfs)
-
-    #print osfs.listdir("/projects/fs")
-
-    #sub_fs = osfs.open_dir("projects/")
-
-    #print sub_fs
+    def getxattr(self, path, key, default=None):
+        self._lock.acquire()
+        try:
+            if xattr is None:
+                return FS.getxattr(self, path, key, default)
+            try:
+                return xattr.xattr(self.getsyspath(path)).get(key)
+            except IOError, e:
+                if e.errno == 95:
+                    return FS.getxattr(self, path, key, default)
+                else:
+                    raise OperationFailedError('XATTR_FAILED', path, details=e)
+        finally:
+            self._lock.release()
 
-    #sub_fs.open('test.txt')
+    def removexattr(self, path, key):
+        self._lock.acquire()
+        try:
+            if xattr is None:
+                return FS.removexattr(self, path, key)
+            try:
+                del xattr.xattr(self.getsyspath(path))[key]
+            except KeyError:
+                pass
+            except IOError, e:
+                if e.errono == 95:
+                    return FS.removexattr(self, path, key)
+                else:
+                    raise OperationFailedError('XATTR_FAILED', path, details=e)
+        finally:
+            self._lock.release()
 
-    #print sub_fs.listdir(dirs_only=True)
-    #print sub_fs.listdir()
-    #print_fs(sub_fs, max_levels=2)
+    def listxattrs(self, path):
+        self._lock.acquire()
+        try:
+            if xattr is None:
+                return FS.listxattrs(self, path)
+            try:
+                return xattr.xattr(self.getsyspath(path)).keys()
+            except IOError, e:
+                if errono == 95:
+                    return FS.listxattrs(self, path)
+                else:
+                    raise OperationFailedError('XATTR_FAILED', path, details=e)
+        finally:
+            self._lock.release()
 
-    #for f in osfs.listdir():
-    #    print f
 
-    #print osfs.listdir('projects', dirs_only=True, wildcard="d*")
 
-    #print_fs(osfs, 'projects/')
+if __name__ == "__main__":
 
-    print pathjoin('/', 'a')
 
-    print pathjoin('a/b/c', '../../e/f')
+    osfs = OSFS('testfs')
+
+
+
+
+    #a = xattr.xattr('/home/will/projects/pyfilesystem/fs/testfs/test.txt')
+    #a['user.comment'] = 'world'
+
+    #print xattr.xattr('/home/will/projects/pyfilesystem/fs/testfs/test.txt').keys()
+
+    print osfs.listxattrs('test.txt')
+    osfs.removexattr('test.txt', 'user.foo')
+    #print osfs.listxattrs('test.txt')
+    osfs.setxattr('test.txt', 'user.foo', 'bar')
+    print osfs.getxattr('test.txt', 'user.foo')
+    print osfs.listxattrs('test.txt')
+    print osfs.getxattrs('test.txt')
+
+    #
+    #osfs = OSFS("~/projects")
+    #
+    #
+    ##for p in osfs.walk("tagging-trunk", search='depth'):
+    ##    print p
+    #
+    #import browsewin
+    #browsewin.browse(osfs)
+    #
+    #print_fs(osfs)
+    #
+    ##print osfs.listdir("/projects/fs")
+    #
+    ##sub_fs = osfs.open_dir("projects/")
+    #
+    ##print sub_fs
+    #
+    ##sub_fs.open('test.txt')
+    #
+    ##print sub_fs.listdir(dirs_only=True)
+    ##print sub_fs.listdir()
+    ##print_fs(sub_fs, max_levels=2)
+    #
+    ##for f in osfs.listdir():
+    ##    print f
+    #
+    ##print osfs.listdir('projects', dirs_only=True, wildcard="d*")
+    #
+    ##print_fs(osfs, 'projects/')
+    #
+    #print pathjoin('/', 'a')
+    #
+    #print pathjoin('a/b/c', '../../e/f')