Edit last record in EDITOR (option -w) if id=-1.

This is a convenience feature. If the user is using a keyboard shortcut to add
a selected link as bookmark from the DE, he may want to edit it shortly. The -1
index enables him to open the last bookmark added without using option `-p -1`.

README.md

@@ -160,7 +160,8 @@ GENERAL OPTIONS:
                            - otherwise refresh all titles
       -w, --write [editor|index]
                            open editor to edit a fresh bookmark
-                           to update by index, EDITOR must be set
+                           edit last bookmark, if index=-1
+                           to specify index, EDITOR must be set
       -d, --delete [...]   remove bookmarks from DB
                            accepts indices or a single range
                            if no arguments:

buku.1

@@ -105,7 +105,7 @@ Edit a bookmark in
 .I editor
 before adding it. To edit and update an existing bookmark, the
 .I index
-should be passed. However, in this case the environment variable EDITOR must be set.
+should be passed. However, in this case the environment variable EDITOR must be set. The last record is opened in EDITOR if index=-1.
 .TP
 .BI \-d " " \--delete " [...]"
 Delete bookmarks. Accepts space-separated list of indices (e.g. 5 6 23 4 110 45) or a single hyphenated range (e.g. 100-200). Note that range and list don't work together. Deletes search results when combined with search options, if no arguments.

buku.py

@@ -1160,6 +1160,7 @@ class BukuDb:
         ----------
         index : int
             DB index of the record.
+            Last record, if index is -1.
         immutable : int, optional
             Diable title fetch from web if 1. Default is -1.
 
@@ -1174,6 +1175,13 @@ class BukuDb:
             logerr('EDITOR must be set to use index with -w')
             return False
 
+        if (index == -1):
+            # Edit the last records
+            index = self.get_max_id()
+            if index == -1:
+                logerr('Empty database')
+                return False
+
         rec = self.get_rec_by_id(index)
         if not rec:
             logerr('No matching index %d', index)
@@ -3846,7 +3854,8 @@ POSITIONAL ARGUMENTS:
                          - otherwise refresh all titles
     -w, --write [editor|index]
                          open editor to edit a fresh bookmark
-                         to update by index, EDITOR must be set
+                         edit last bookmark, if index=-1
+                         to specify index, EDITOR must be set
     -d, --delete [...]   remove bookmarks from DB
                          accepts indices or a single range
                          if no arguments: