log: teach "terminator" vs "separator" mode to "--pretty=format"

This attached patch introduces a single bit "use_terminator" in "struct
rev_info", which is normally false (i.e. most formats use separator
semantics) but by flipping it to true, you can ask for terminator
semantics just like oneline format does.

The function get_commit_format(), which is what parses "--pretty=" option,
now takes a pointer to "struct rev_info" and updates its commit_format and
use_terminator fields.  It used to return the value of type "enum
cmit_fmt", but all the callers assigned it to rev->commit_format.

There are only two cases the code turns use_terminator on.  Obviously, the
traditional oneline format (--pretty=oneline) is one of them, and the new
case is --pretty=tformat:... that acts like --pretty=format:... but flips
the bit on.

With this, "--pretty=tformat:%H %s" acts like --pretty=oneline.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/log-tree.c b/log-tree.c
index 9d5406160..8f5436b74 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -249,9 +249,9 @@ void show_log(struct rev_info *opt, const char *sep)
 	 *    not have an empty line between entries.
 	 */
 	extra = "";
-	if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
+	if (*sep != '\n' && opt->use_terminator)
 		extra = "\n";
-	if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
+	if (opt->shown_one && !opt->use_terminator)
 		putchar(opt->diffopt.line_termination);
 	opt->shown_one = 1;