[PATCH 4/5] ref_format: add option to skip `\n` at eol

["Hariom Verma via GitGitGadget" <gitgitgadget@gmail.com>]

From: Hariom Verma <hariom18599@gmail.com>

We might always need a `\n` at end of line in the case of
`git for-each-ref`. But as we intend to use ref-filter's logic
in pretty, having an option to skip `\n` will be useful.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Heba Waly <heba.waly@gmail.com>
Signed-off-by: Hariom Verma <hariom18599@gmail.com>
---
 ref-filter.c | 3 ++-
 ref-filter.h | 4 +++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index bf7b70299b4..0e2fecbda4c 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -2410,7 +2410,8 @@ void show_ref_array_item(struct ref_array_item *info,
 	fwrite(final_buf.buf, 1, final_buf.len, stdout);
 	strbuf_release(&error_buf);
 	strbuf_release(&final_buf);
-	putchar('\n');
+	if(format->need_newline_at_eol)
+		putchar('\n');
 }
 
 void pretty_print_ref(const char *name, const struct object_id *oid,
diff --git a/ref-filter.h b/ref-filter.h
index 8ecc33cdfa5..410446dc412 100644
--- a/ref-filter.h
+++ b/ref-filter.h
@@ -81,11 +81,13 @@ struct ref_format {
 	int quote_style;
 	int use_color;
 
+	int need_newline_at_eol;
+
 	/* Internal state to ref-filter */
 	int need_color_reset_at_eol;
 };
 
-#define REF_FORMAT_INIT { NULL, 0, -1 }
+#define REF_FORMAT_INIT { NULL, 0, -1, 1 }
 
 /*  Macros for checking --merged and --no-merged options */
 #define _OPT_MERGED_NO_MERGED(option, filter, h) \
-- 
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