python samples: scripts to compute a file udi and list non-indexed files

src/python/samples/rclfileudi.py

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+#!/usr/bin/python3
+# Copyright (C) 2020 J.F.Dockes
+#
+# License: GPL 2.1
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the
+# Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+import hashlib
+import base64
+import sys
+
+# The following 2 methods replicate the file UDI computation in fileudi.cpp:
+# process a file path so that it is usable (short enough) for use as a Xapian
+# term. We truncate and replace the truncated part by its md5 hash.
+def pathHash(path, maxlen):
+    HASHLEN = 22
+    if len(path) <= maxlen:
+        return path
+    digest = hashlib.md5(path[maxlen-HASHLEN:]).digest()
+    adigest = base64.b64encode(digest)
+    adigest = adigest[:-2]
+    return path[:maxlen-HASHLEN] + adigest
+
+def make_udi(path, ipath=b""):
+    PATHHASHLEN = 150
+    path +=  b"|"
+    path += ipath
+    return pathHash(path, PATHHASHLEN)
+
+
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print("Usage: rclfilestatus.py <outfile>", file=sys.stderr)
+        sys.exit(1)
+
+    fnout = sys.argv[1]
+    fout = open(fnout, "wb")
+
+    for line in sys.stdin.buffer:
+        path = line.rstrip(b"\n")
+        udi = make_udi(path)
+        fout.write(udi + b"\n")
+
+    fout.close()

src/python/samples/rclnotindexed.py

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+#!/usr/bin/python3
+# Copyright (C) 2020 J.F.Dockes
+#
+# License: GPL 2.1
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the
+# Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import sys
+import hashlib
+import base64
+
+import xapian
+import rclconfig
+
+
+# The following 2 methods replicate the file UDI computation in fileudi.cpp:
+# process a file path so that it is usable (short enough) for use as a Xapian
+# term. We truncate and replace the truncated part by its md5 hash.
+def pathHash(path, maxlen):
+    HASHLEN = 22
+    if len(path) <= maxlen:
+        return path
+    digest = hashlib.md5(path[maxlen-HASHLEN:]).digest()
+    adigest = base64.b64encode(digest)
+    adigest = adigest[:-2]
+    return path[:maxlen-HASHLEN] + adigest
+
+def make_udi(path, ipath=b""):
+    PATHHASHLEN = 150
+    path +=  b"|"
+    path += ipath
+    return pathHash(path, PATHHASHLEN)
+
+# Return xapian posting list contents as Python list
+def get_postlist(xdb, term):
+    ret = list()
+    for posting in xdb.postlist(term):
+        ret.append(posting.docid)
+    return ret
+
+if __name__ == '__main__':
+    if len(sys.argv) != 1:
+        print("Usage: rclnotindexed", file=sys.stderr)
+        print(" reads paths on stdin", file=sys.stderr)
+        sys.exit(1)
+
+    config = rclconfig.RclConfig()
+    dbdir = config.getDbDir()
+    xdb = xapian.Database(dbdir)
+
+    for line in sys.stdin.buffer:
+        path = line.rstrip(b"\n")
+        udi = make_udi(path)
+        term = b"Q" + udi
+        postlist = get_postlist(xdb, term)
+        if len(postlist) == 0:
+            sys.stdout.buffer.write(path + b"\n")
+        elif len(postlist) > 1:
+            sys.stdout.buffer.write("!! Multiple document entries for: " +
+                                        path + b"\n")
+            sys.exit(1)