[PATCH v3 3/5] cli: add --format=text0 to notmuch search

[Jani Nikula]

Add new format text0, which is otherwise the same as text, but use the
null character as separator instead of the newline character. This is
similar to find(1) -print0 option, and works together with the
xargs(1) -0 option.
---
 notmuch-search.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/notmuch-search.c b/notmuch-search.c
index 6218622..627962b 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -305,8 +305,12 @@ notmuch_search_command (void *ctx, int argc, char *argv[])
     int exclude = EXCLUDE_TRUE;
     unsigned int i;

-    enum { NOTMUCH_FORMAT_JSON, NOTMUCH_FORMAT_TEXT, NOTMUCH_FORMAT_SEXP }
-       format_sel = NOTMUCH_FORMAT_TEXT;
+    enum {
+       NOTMUCH_FORMAT_JSON,
+       NOTMUCH_FORMAT_TEXT,
+       NOTMUCH_FORMAT_TEXT0,
+       NOTMUCH_FORMAT_SEXP
+    } format_sel = NOTMUCH_FORMAT_TEXT;

     notmuch_opt_desc_t options[] = {
        { NOTMUCH_OPT_KEYWORD, &sort, "sort", 's',
@@ -317,6 +321,7 @@ notmuch_search_command (void *ctx, int argc, char *argv[])
          (notmuch_keyword_t []){ { "json", NOTMUCH_FORMAT_JSON },
                                  { "sexp", NOTMUCH_FORMAT_SEXP },
                                  { "text", NOTMUCH_FORMAT_TEXT },
+                                 { "text0", NOTMUCH_FORMAT_TEXT0 },
                                  { 0, 0 } } },
        { NOTMUCH_OPT_KEYWORD, &output, "output", 'o',
          (notmuch_keyword_t []){ { "summary", OUTPUT_SUMMARY },
@@ -345,6 +350,13 @@ notmuch_search_command (void *ctx, int argc, char *argv[])
     case NOTMUCH_FORMAT_TEXT:
        format = sprinter_text_create (ctx, stdout);
        break;
+    case NOTMUCH_FORMAT_TEXT0:
+       if (output == OUTPUT_SUMMARY) {
+           fprintf (stderr, "Error: --format=text0 is not compatible with 
--output=summary.\n");
+           return 1;
+       }
+       format = sprinter_text0_create (ctx, stdout);
+       break;
     case NOTMUCH_FORMAT_JSON:
        format = sprinter_json_create (ctx, stdout);
        break;
-- 
1.7.10.4