This patch was originally sent by Andreas Klöckner in:
  id:200912141421.52561.li...@informa.tiker.net. It was then
  subsequently updated by Michal Sojka in:
  id:1264692317-9175-2-git-send-email-sojk...@fel.cvut.cz and then
  further improved again by Michal Sojka in:
  id:1265122868-12133-1-git-send-email-sojk...@fel.cvut.cz

  This is a rebase of the latest patch off of the current git HEAD.

. The differences from the original patch are:
  - Rebased off of current git HEAD
  - Folder name is taken from strings generated during travesal. It no
    longer uses glib nor it allocates additional memory to determine the
    base name. The same approach as in
    id:87fx8bygi7....@linux.vnet.ibm.com was used.
  - Removed unrelated change which was submitted separately as
    id:1264691584-8290-2-git-send-email-sojk...@fel.cvut.cz
  - Changed the comment describing database schema.

TODO (see Carl's email: id:87zl5k0w6s....@yoom.home.cworth.org):

  - Support hierarchical folders: this patch is only storing the final
    directory component. This should be hooked in differently with
    filename storage so the whole filename is indexed as text to
    provide arbitrary search phrases such as "folder:'foo/bar/baz'"
---
 lib/database.cc |   13 +++++++++----
 lib/notmuch.h   |    1 +
 notmuch-new.c   |   39 +++++++++++++++++++++++++++++++++++++--
 3 files changed, 47 insertions(+), 6 deletions(-)

diff --git a/lib/database.cc b/lib/database.cc
index c91e97c..6364623 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -84,9 +84,9 @@ typedef struct {
  *     MESSAGE_ID:     The unique ID of the mail mess (see "id" above)
  *
  * In addition, terms from the content of the message are added with
- * "from", "to", "attachment", and "subject" prefixes for use by the
- * user in searching. But the database doesn't really care itself
- * about any of these.
+ * "from", "to", "attachment", "subject" and "folder" prefixes for use
+ * by the user in searching. But the database doesn't really care
+ * itself about any of these.
  *
  * The data portion of a mail document is empty.
  *
@@ -155,7 +155,8 @@ prefix_t PROBABILISTIC_PREFIX[]= {
     { "from",                  "XFROM" },
     { "to",                    "XTO" },
     { "attachment",            "XATTACHMENT" },
-    { "subject",               "XSUBJECT"}
+    { "subject",               "XSUBJECT"},
+    { "folder",                "XFOLDER"}
 };
 
 int
@@ -1362,6 +1363,7 @@ _notmuch_database_link_message (notmuch_database_t 
*notmuch,
 notmuch_status_t
 notmuch_database_add_message (notmuch_database_t *notmuch,
                              const char *filename,
+                             const char *folder_name,
                              notmuch_message_t **message_ret)
 {
     notmuch_message_file_t *message_file;
@@ -1477,6 +1479,9 @@ notmuch_database_add_message (notmuch_database_t *notmuch,
            date = notmuch_message_file_get_header (message_file, "date");
            _notmuch_message_set_date (message, date);
 
+           if (folder_name != NULL)
+               _notmuch_message_gen_terms (message, "folder", folder_name);
+
            _notmuch_message_index_file (message, filename);
        } else {
            ret = NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID;
diff --git a/lib/notmuch.h b/lib/notmuch.h
index 88da078..ce81565 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -264,6 +264,7 @@ notmuch_database_get_directory (notmuch_database_t 
*database,
 notmuch_status_t
 notmuch_database_add_message (notmuch_database_t *database,
                              const char *filename,
+                             const char *folder_name,
                              notmuch_message_t **message);
 
 /* Remove a message from the given notmuch database.
diff --git a/notmuch-new.c b/notmuch-new.c
index 44b50aa..6ad3c09 100644
--- a/notmuch-new.c
+++ b/notmuch-new.c
@@ -21,6 +21,7 @@
 #include "notmuch-client.h"
 
 #include <unistd.h>
+#include <glib.h>
 
 typedef struct _filename_node {
     char *filename;
@@ -169,6 +170,35 @@ _entries_resemble_maildir (struct dirent **entries, int 
count)
     return 0;
 }
 
+static char*
+_get_folder_base_name(const char *path)
+{
+  gchar *full_folder_name = NULL;
+  gchar *folder_base_name = NULL;
+  
+  /* Find name of "folder" containing the email. */
+  full_folder_name = g_strdup(path);
+  while (1) {
+    folder_base_name = g_path_get_basename(full_folder_name);
+    
+    if (strcmp(folder_base_name, "cur") == 0
+       || strcmp(folder_base_name, "new") == 0) {
+      gchar *parent_name = g_path_get_dirname(full_folder_name);
+      g_free(full_folder_name);
+      full_folder_name = parent_name;
+    } else
+      break;
+  }
+  
+  g_free(full_folder_name);
+  
+  if (strcmp(folder_base_name, ".") == 0) {
+    g_free(folder_base_name);
+    folder_base_name = NULL;
+  }
+  return folder_base_name;
+}
+
 /* Examine 'path' recursively as follows:
  *
  *   o Ask the filesystem for the mtime of 'path' (fs_mtime)
@@ -222,6 +252,7 @@ add_files_recursive (notmuch_database_t *notmuch,
     notmuch_filenames_t *db_subdirs = NULL;
     struct stat st;
     notmuch_bool_t is_maildir, new_directory;
+    char *folder_base_name = NULL;
 
     if (stat (path, &st)) {
        fprintf (stderr, "Error reading directory %s: %s\n",
@@ -407,7 +438,10 @@ add_files_recursive (notmuch_database_t *notmuch,
            fflush (stdout);
        }
 
-       status = notmuch_database_add_message (notmuch, next, &message);
+       folder_base_name = _get_folder_base_name(path);
+       status = notmuch_database_add_message (notmuch, next,
+                                              folder_base_name,
+                                              &message);
        switch (status) {
        /* success */
        case NOTMUCH_STATUS_SUCCESS:
@@ -499,7 +533,8 @@ add_files_recursive (notmuch_database_t *notmuch,
        notmuch_filenames_destroy (db_files);
     if (directory)
        notmuch_directory_destroy (directory);
-
+    if (folder_base_name)
+       g_free(folder_base_name);
     return ret;
 }
 
-- 
1.7.0.4

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