lib: make folder: prefix literal

In xapian terms, convert folder: prefix from probabilistic to boolean
prefix, matching the paths, relative from the maildir root, of the
message files, ignoring the maildir new and cur leaf directories.

folder:foo matches all message files in foo, foo/new, and foo/cur.

folder:foo/new does *not* match message files in foo/new.

folder:"" matches all message files in the top level maildir and its
new and cur subdirectories.

This change constitutes a database change: bump the database version
and add database upgrade support for folder: terms. The upgrade also
adds path: terms.

Finally, fix the folder search test for literal folder: search, as
some of the folder: matching capabilities are lost in the
probabilistic to boolean prefix change.

1 files changed, 21 insertions, 3 deletions

diff --git a/test/T100-search-by-folder.sh b/test/T100-search-by-folder.sh
index 5cc2ca8d..a7f63dd1 100755
--- a/test/T100-search-by-folder.sh
+++ b/test/T100-search-by-folder.sh
@@ -3,6 +3,7 @@ test_description='"notmuch search" by folder: (with variations)'
 . ./test-lib.sh
 
 add_message '[dir]=bad' '[subject]="To the bone"'
+add_message '[dir]=.' '[subject]="Top level"'
 add_message '[dir]=bad/news' '[subject]="Bears"'
 mkdir -p "${MAIL_DIR}/duplicate/bad/news"
 cp "$gen_msg_filename" "${MAIL_DIR}/duplicate/bad/news"
@@ -12,29 +13,46 @@ add_message '[dir]=things/favorite' '[subject]="Raindrops, whiskers, kettles"'
 add_message '[dir]=things/bad' '[subject]="Bites, stings, sad feelings"'
 
 test_begin_subtest "Single-world folder: specification (multiple results)"
-output=$(notmuch search folder:bad | notmuch_search_sanitize)
+output=$(notmuch search folder:bad folder:bad/news folder:things/bad | notmuch_search_sanitize)
 test_expect_equal "$output" "thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; To the bone (inbox unread)
 thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Bears (inbox unread)
 thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Bites, stings, sad feelings (inbox unread)"
 
+test_begin_subtest "Top level folder"
+output=$(notmuch search folder:'""' | notmuch_search_sanitize)
+test_expect_equal "$output" "thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Top level (inbox unread)"
+
 test_begin_subtest "Two-word path to narrow results to one"
 output=$(notmuch search folder:bad/news | notmuch_search_sanitize)
 test_expect_equal "$output" "thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Bears (inbox unread)"
 
+test_begin_subtest "Folder search with --output=files"
+output=$(notmuch search --output=files folder:bad/news | notmuch_search_files_sanitize)
+test_expect_equal "$output" "MAIL_DIR/bad/news/msg-003
+MAIL_DIR/duplicate/bad/news/msg-003"
+
 test_begin_subtest "After removing duplicate instance of matching path"
 rm -r "${MAIL_DIR}/bad/news"
 notmuch new
 output=$(notmuch search folder:bad/news | notmuch_search_sanitize)
+test_expect_equal "$output" ""
+
+test_begin_subtest "Folder search with --output=files part #2"
+output=$(notmuch search --output=files folder:duplicate/bad/news | notmuch_search_files_sanitize)
+test_expect_equal "$output" "MAIL_DIR/duplicate/bad/news/msg-003"
+
+test_begin_subtest "After removing duplicate instance of matching path part #2"
+output=$(notmuch search folder:duplicate/bad/news | notmuch_search_sanitize)
 test_expect_equal "$output" "thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Bears (inbox unread)"
 
 test_begin_subtest "After rename, old path returns nothing"
 mv "${MAIL_DIR}/duplicate/bad/news" "${MAIL_DIR}/duplicate/bad/olds"
 notmuch new
-output=$(notmuch search folder:bad/news | notmuch_search_sanitize)
+output=$(notmuch search folder:duplicate/bad/news | notmuch_search_sanitize)
 test_expect_equal "$output" ""
 
 test_begin_subtest "After rename, new path returns result"
-output=$(notmuch search folder:bad/olds | notmuch_search_sanitize)
+output=$(notmuch search folder:duplicate/bad/olds | notmuch_search_sanitize)
 test_expect_equal "$output" "thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; Bears (inbox unread)"
 
 test_done