This one triggers only when git-pack-objects is called with 
--all-progress and --stdout which is the combination used by
git-push.

Signed-off-by: Nicolas Pitre <nico@cam.org>
---
 builtin-pack-objects.c |    2 +-
 csum-file.c            |    8 ++++++++
 csum-file.h            |    4 ++++
 3 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 52a26a2..25ec65d 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -606,7 +606,7 @@ static void write_pack_file(void)
 		char *pack_tmp_name = NULL;
 
 		if (pack_to_stdout) {
-			f = sha1fd(1, "<stdout>");
+			f = sha1fd_throughput(1, "<stdout>", progress_state);
 		} else {
 			char tmpname[PATH_MAX];
 			int fd;
diff --git a/csum-file.c b/csum-file.c
index 9929991..3729e73 100644
--- a/csum-file.c
+++ b/csum-file.c
@@ -8,6 +8,7 @@
  * able to verify hasn't been messed with afterwards.
  */
 #include "cache.h"
+#include "progress.h"
 #include "csum-file.h"
 
 static void sha1flush(struct sha1file *f, unsigned int count)
@@ -17,6 +18,7 @@ static void sha1flush(struct sha1file *f, unsigned int count)
 	for (;;) {
 		int ret = xwrite(f->fd, buf, count);
 		if (ret > 0) {
+			display_throughput(f->tp, ret);
 			buf = (char *) buf + ret;
 			count -= ret;
 			if (count)
@@ -80,6 +82,11 @@ int sha1write(struct sha1file *f, void *buf, unsigned int count)
 
 struct sha1file *sha1fd(int fd, const char *name)
 {
+	return sha1fd_throughput(fd, name, NULL);
+}
+
+struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp)
+{
 	struct sha1file *f;
 	unsigned len;
 
@@ -94,6 +101,7 @@ struct sha1file *sha1fd(int fd, const char *name)
 	f->fd = fd;
 	f->error = 0;
 	f->offset = 0;
+	f->tp = tp;
 	f->do_crc = 0;
 	SHA1_Init(&f->ctx);
 	return f;
diff --git a/csum-file.h b/csum-file.h
index c3c792f..4d1b231 100644
--- a/csum-file.h
+++ b/csum-file.h
@@ -1,11 +1,14 @@
 #ifndef CSUM_FILE_H
 #define CSUM_FILE_H
 
+struct progress;
+
 /* A SHA1-protected file */
 struct sha1file {
 	int fd, error;
 	unsigned int offset, namelen;
 	SHA_CTX ctx;
+	struct progress *tp;
 	char name[PATH_MAX];
 	int do_crc;
 	uint32_t crc32;
@@ -13,6 +16,7 @@ struct sha1file {
 };
 
 extern struct sha1file *sha1fd(int fd, const char *name);
+extern struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp);
 extern int sha1close(struct sha1file *, unsigned char *, int);
 extern int sha1write(struct sha1file *, void *, unsigned int);
 extern void crc32_begin(struct sha1file *);

-
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