Change info gathering to proper db reads.

Running `xapian info` and parsing the output breaks way to easily, here
we instead just open the database file and look for ourselves.

1 files changed, 16 insertions, 0 deletions

diff --git a/mu4web/xapian.py b/mu4web/xapian.py
new file mode 100644
index 0000000..8aebf72
--- /dev/null
+++ b/mu4web/xapian.py
@@ -0,0 +1,16 @@
+import subprocess
+from typing import Optional
+
+def metadata_list(db, prefix: Optional[str] = None) -> list[str]:
+    cmdline = ['xapian-metadata', 'list', db]
+    if prefix:
+        cmdline.append(prefix)
+    cmd = subprocess.run(cmdline, capture_output=True, text=True)
+    return cmd.stdout.split('\n')
+
+
+def metadata_get(db, key: str) -> str:
+    cmd = subprocess.run(['xapian-metadata', 'get', db, key],
+                         capture_output=True, text=True)
+    return cmd.stdout.strip()
+