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authorLibravatar SZEDER Gábor <szeder.dev@gmail.com>2019-04-12 21:45:14 +0200
committerLibravatar Junio C Hamano <gitster@pobox.com>2019-04-15 12:11:25 +0900
commit9f1fd84e15a8109f02867e369c747a1cbe766ba1 (patch)
treee953d5ac1898f40de1ca73495579a9c34ddf4842
parentprogress: assemble percentage and counters in a strbuf before printing (diff)
downloadtgif-9f1fd84e15a8109f02867e369c747a1cbe766ba1.tar.xz
progress: clear previous progress update dynamically
When the progress bar includes throughput, its length can shorten as the unit of display changes from KiB to MiB. To cover up remnants of the previous progress bar when such a change of units happens we always print three spaces at the end of the progress bar. Alas, covering only three characters is not quite enough: when both the total and the throughput happen to change units from KiB to MiB in the same update, then the progress bar's length is shortened by four characters (or maybe even more!): Receiving objects: 25% (2901/11603), 772.01 KiB | 733.00 KiB/s Receiving objects: 27% (3133/11603), 1.43 MiB | 1.16 MiB/s s and a stray 's' is left behind. So instead of hard-coding the three characters to cover, let's compare the length of the current progress bar with the previous one, and cover up as many characters as needed. Sure, it would be much simpler to just print more spaces at the end of the progress bar, but this approach is more future-proof, and it won't print extra spaces when none are needed, notably when the progress bar doesn't show throughput and thus never shrinks. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--progress.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/progress.c b/progress.c
index 564845a36b..949a2a576d 100644
--- a/progress.c
+++ b/progress.c
@@ -84,6 +84,7 @@ static void display(struct progress *progress, uint64_t n, const char *done)
const char *tp;
struct strbuf *counters_sb = &progress->counters_sb;
int show_update = 0;
+ int last_count_len = counters_sb->len;
if (progress->delay && (!progress_update || --progress->delay))
return;
@@ -110,10 +111,12 @@ static void display(struct progress *progress, uint64_t n, const char *done)
if (show_update) {
if (is_foreground_fd(fileno(stderr)) || done) {
- const char *eol = done ? done : " \r";
-
- fprintf(stderr, "%s: %s%s", progress->title,
- counters_sb->buf, eol);
+ const char *eol = done ? done : "\r";
+ size_t clear_len = counters_sb->len < last_count_len ?
+ last_count_len - counters_sb->len + 1 :
+ 0;
+ fprintf(stderr, "%s: %s%*s", progress->title,
+ counters_sb->buf, (int) clear_len, eol);
fflush(stderr);
}
progress_update = 0;