Migrate from bsddb3 to berkeleydb

Following official documentation, move away from bsddb3 to berkeleydb.
https://www.jcea.es/programacion/pybsddb.htm

Main change: key and values are now bytes and not strings.

The code diff is really simple because all operations on keys/values is
done from elixir/data.py and that works fine with both bytes and
strings (it does explicit casting).

docker/Dockerfile

@@ -11,9 +11,8 @@ RUN \
 
 WORKDIR /build/
 
-# TODO switch to berkeleydb
 # NOTE wheel version MUST be sycnhronized with requirements.txt
-RUN pip wheel bsddb3==6.2.9
+RUN pip wheel berkeleydb==18.1.10
 
 FROM debian:bookworm
 
@@ -37,11 +36,11 @@ COPY . /usr/local/elixir/
 
 WORKDIR /usr/local/elixir/
 
-COPY --from=build /build/bsddb3-6.2.9-*.whl /tmp/build/
+COPY --from=build /build/berkeleydb-*.whl /tmp/build/
 
 RUN python3 -m venv venv && \
     . ./venv/bin/activate && \
-    pip install /tmp/build/bsddb3-6.2.9-*.whl && \
+    pip install /tmp/build/berkeleydb-*.whl && \
     pip install -r requirements.txt
 
 RUN mkdir -p /srv/elixir-data/

elixir/autocomplete.py

@@ -21,7 +21,7 @@
 import os
 import json
 from urllib import parse
-from bsddb3.db import DB_SET_RANGE
+from berkeleydb.db import DB_SET_RANGE
 import falcon
 
 from .lib import autoBytes, validFamily

elixir/data.py

@@ -18,7 +18,7 @@
 #  You should have received a copy of the GNU Affero General Public License
 #  along with Elixir.  If not, see <http://www.gnu.org/licenses/>.
 
-import bsddb3
+import berkeleydb
 import re
 from .lib import autoBytes
 import os
@@ -147,15 +147,15 @@ def pack(self):
 class BsdDB:
     def __init__(self, filename, readonly, contentType, shared=False):
         self.filename = filename
-        self.db = bsddb3.db.DB()
-        flags = bsddb3.db.DB_THREAD if shared else 0
+        self.db = berkeleydb.db.DB()
+        flags = berkeleydb.db.DB_THREAD if shared else 0
 
         if readonly:
-            flags |= bsddb3.db.DB_RDONLY
+            flags |= berkeleydb.db.DB_RDONLY
             self.db.open(filename, flags=flags)
         else:
-            flags |= bsddb3.db.DB_CREATE
-            self.db.open(filename, flags=flags, mode=0o644, dbtype=bsddb3.db.DB_BTREE)
+            flags |= berkeleydb.db.DB_CREATE
+            self.db.open(filename, flags=flags, mode=0o644, dbtype=berkeleydb.db.DB_BTREE)
         self.ctype = contentType
 
     def exists(self, key):

requirements.txt

@@ -5,7 +5,7 @@ Pygments~=2.18.0
 Falcon @ git+https://github.com/falconry/falcon.git@cbca63dc7739720eab856f48b32f9e782438be7a
 pytest==7.2.1
 
-# NOTE binary wheels of bsddb3 are not distributed - on Debian this may
+# NOTE binary wheels of berkeleydb are not distributed - on Debian this may
 # require installing build-essentials, python3-dev and libdb-dev
 # NOTE keep in sync with wheel version in the Dockerfile
-bsddb3==6.2.9
+berkeleydb==18.1.10