[PATCH 3/4] fast-import: add option command

[Sverre Rabbelier <srabbelier@gmail.com>]

This allows the frontend to specify any of the supported options as
long as no non-option command has been given. This way the
user does not have to include any frontend-specific options, but
instead she can rely on the frontend to tell fast-import what it
needs.
---

    This is a lot simpler from the previous version as we can now
    reuse parse_one_option from 1/4.

 fast-import.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/fast-import.c b/fast-import.c
index 17d57ab..2ec804d 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -348,6 +348,7 @@ static struct recent_command *rc_free;
 static unsigned int cmd_save = 100;
 static uintmax_t next_mark;
 static struct strbuf new_data = STRBUF_INIT;
+static int seen_non_option_command;
 
 static void write_branch_report(FILE *rpt, struct branch *b)
 {
@@ -1663,6 +1664,10 @@ static int read_next_command(void)
 			if (stdin_eof)
 				return EOF;
 
+			if (!seen_non_option_command
+				&& prefixcmp(command_buf.buf, "option "))
+				seen_non_option_command = 1;
+
 			rc = rc_free;
 			if (rc)
 				rc_free = rc->next;
@@ -2460,6 +2465,16 @@ static void parse_one_option(const char *option)
     }
 }
 
+static void parse_option(void)
+{
+    char* option = command_buf.buf + 7;
+
+	if (seen_non_option_command)
+		die("Got option command '%s' after non-option command", option);
+
+    parse_one_option(option);
+}
+
 static int git_pack_config(const char *k, const char *v, void *cb)
 {
 	if (!strcmp(k, "pack.depth")) {
@@ -2534,6 +2549,8 @@ int main(int argc, const char **argv)
 			parse_checkpoint();
 		else if (!prefixcmp(command_buf.buf, "progress "))
 			parse_progress();
+		else if (!prefixcmp(command_buf.buf, "option "))
+			parse_option();
 		else
 			die("Unsupported command: %s", command_buf.buf);
 	}
-- 
1.6.4.16.g72c66.dirty