[PATCH 04/10] reply: Support --use-schema

[Austin Clements <amdragon@MIT.EDU>]

---
 man/man1/notmuch-reply.1 |   21 +++++++++++++++++++++
 notmuch-client.h         |    4 ++++
 notmuch-reply.c          |    3 +++
 3 files changed, 28 insertions(+)

diff --git a/man/man1/notmuch-reply.1 b/man/man1/notmuch-reply.1
index d264060..71ff569 100644
--- a/man/man1/notmuch-reply.1
+++ b/man/man1/notmuch-reply.1
@@ -52,6 +52,16 @@ to create a reply message intelligently.
 Only produces In\-Reply\-To, References, To, Cc, and Bcc headers.
 .RE
 .RE
+
+.RS
+.TP 4
+.BR \-\-use-schema=N
+
+Use the specified structured output schema version.  This is intended
+for programs that invoke \fBnotmuch\fR(1) internally.  If omitted, the
+latest supported version will be used.
+.RE
+
 .RS
 .TP 4
 .BR \-\-reply\-to= ( all | sender )
@@ -93,6 +103,17 @@ replying to multiple messages at once, but the JSON format does not.
 .RE
 .RE
 
+.SH EXIT STATUS
+
+This command supports the following special exit status codes
+
+.TP
+.B 20
+The requested schema version is too old.
+.TP
+.B 21
+The requested schema version is too new.
+
 .SH SEE ALSO
 
 \fBnotmuch\fR(1), \fBnotmuch-config\fR(1), \fBnotmuch-count\fR(1),
diff --git a/notmuch-client.h b/notmuch-client.h
index d931bbf..0eb6b36 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -144,6 +144,10 @@ chomp_newline (char *str)
 #define NOTMUCH_SCHEMA_SEARCH 1
 /* The minimum schema version supported by the "show" command. */
 #define NOTMUCH_SCHEMA_SHOW 1
+/* The minimum schema version supported by the "reply" command.  Reply
+ * uses show, so in general this must be >= NOTMUCH_SCHEMA_SHOW.
+ */
+#define NOTMUCH_SCHEMA_REPLY 1
 
 /* The schema version requested by the caller on the command line.  If
  * no schema version is requested, this should be set to
diff --git a/notmuch-reply.c b/notmuch-reply.c
index e60a264..059a412 100644
--- a/notmuch-reply.c
+++ b/notmuch-reply.c
@@ -724,6 +724,7 @@ notmuch_reply_command (void *ctx, int argc, char *argv[])
 				  { "json", FORMAT_JSON },
 				  { "headers-only", FORMAT_HEADERS_ONLY },
 				  { 0, 0 } } },
+	{ NOTMUCH_OPT_INT, &notmuch_schema_version, "use-schema", 0, 0 },
 	{ NOTMUCH_OPT_KEYWORD, &reply_all, "reply-to", 'r',
 	  (notmuch_keyword_t []){ { "all", TRUE },
 				  { "sender", FALSE },
@@ -745,6 +746,8 @@ notmuch_reply_command (void *ctx, int argc, char *argv[])
     else
 	reply_format_func = notmuch_reply_format_default;
 
+    notmuch_exit_if_unsupported_schema ("reply", NOTMUCH_SCHEMA_REPLY);
+
     config = notmuch_config_open (ctx, NULL, NULL);
     if (config == NULL)
 	return 1;
-- 
1.7.10.4