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git/progress.c

373 lines
9.1 KiB

/*
* Simple text-based progress display module for GIT
*
* Copyright (c) 2007 by Nicolas Pitre <nico@fluxnic.net>
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define GIT_TEST_PROGRESS_ONLY
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
#include "cache.h"
#include "gettext.h"
#include "progress.h"
#include "strbuf.h"
#include "trace.h"
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
#include "utf8.h"
#include "config.h"
#define TP_IDX_MAX 8
struct throughput {
off_t curr_total;
off_t prev_total;
uint64_t prev_ns;
unsigned int avg_bytes;
unsigned int avg_misecs;
unsigned int last_bytes[TP_IDX_MAX];
unsigned int last_misecs[TP_IDX_MAX];
unsigned int idx;
struct strbuf display;
};
struct progress {
const char *title;
uint64_t last_value;
uint64_t total;
unsigned last_percent;
unsigned delay;
unsigned sparse;
struct throughput *throughput;
uint64_t start_ns;
struct strbuf counters_sb;
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
int title_len;
int split;
};
static volatile sig_atomic_t progress_update;
Test the progress display 'progress.c' has seen a few fixes recently [1], and, unfortunately, some of those fixes required further fixes [2]. It seems it's time to have a few tests focusing on the subtleties of the progress display. Add the 'test-tool progress' subcommand to help testing the progress display, reading instructions from standard input and turning them into calls to the display_progress() and display_throughput() functions with the given parameters. The progress display is, however, critically dependent on timing, because it's only updated once every second or, if the toal is known in advance, every 1%, and there is the throughput rate as well. These make the progress display far too undeterministic for testing as-is. To address this, add a few testing-specific variables and functions to 'progress.c', allowing the the new test helper to: - Disable the triggered-every-second SIGALRM and set the 'progress_update' flag explicitly based in the input instructions. This way the progress line will be updated deterministically when the test wants it to be updated. - Specify the time elapsed since start_progress() to make the throughput rate calculations deterministic. Add the new test script 't0500-progress-display.sh' to check a few simple cases with and without throughput, and that a shorter progress line properly covers up the previously displayed line in different situations. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). [2] 1aed1a5f25 (progress: avoid empty line when breaking the progress line, 2019-05-19) Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
/*
* These are only intended for testing the progress output, i.e. exclusively
* for 'test-tool progress'.
*/
int progress_testing;
uint64_t progress_test_ns = 0;
void progress_test_force_update(void)
{
progress_update = 1;
}
static void progress_interval(int signum)
{
progress_update = 1;
}
static void set_progress_signal(void)
{
struct sigaction sa;
struct itimerval v;
Test the progress display 'progress.c' has seen a few fixes recently [1], and, unfortunately, some of those fixes required further fixes [2]. It seems it's time to have a few tests focusing on the subtleties of the progress display. Add the 'test-tool progress' subcommand to help testing the progress display, reading instructions from standard input and turning them into calls to the display_progress() and display_throughput() functions with the given parameters. The progress display is, however, critically dependent on timing, because it's only updated once every second or, if the toal is known in advance, every 1%, and there is the throughput rate as well. These make the progress display far too undeterministic for testing as-is. To address this, add a few testing-specific variables and functions to 'progress.c', allowing the the new test helper to: - Disable the triggered-every-second SIGALRM and set the 'progress_update' flag explicitly based in the input instructions. This way the progress line will be updated deterministically when the test wants it to be updated. - Specify the time elapsed since start_progress() to make the throughput rate calculations deterministic. Add the new test script 't0500-progress-display.sh' to check a few simple cases with and without throughput, and that a shorter progress line properly covers up the previously displayed line in different situations. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). [2] 1aed1a5f25 (progress: avoid empty line when breaking the progress line, 2019-05-19) Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
if (progress_testing)
return;
progress_update = 0;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = progress_interval;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGALRM, &sa, NULL);
v.it_interval.tv_sec = 1;
v.it_interval.tv_usec = 0;
v.it_value = v.it_interval;
setitimer(ITIMER_REAL, &v, NULL);
}
static void clear_progress_signal(void)
{
struct itimerval v = {{0,},};
Test the progress display 'progress.c' has seen a few fixes recently [1], and, unfortunately, some of those fixes required further fixes [2]. It seems it's time to have a few tests focusing on the subtleties of the progress display. Add the 'test-tool progress' subcommand to help testing the progress display, reading instructions from standard input and turning them into calls to the display_progress() and display_throughput() functions with the given parameters. The progress display is, however, critically dependent on timing, because it's only updated once every second or, if the toal is known in advance, every 1%, and there is the throughput rate as well. These make the progress display far too undeterministic for testing as-is. To address this, add a few testing-specific variables and functions to 'progress.c', allowing the the new test helper to: - Disable the triggered-every-second SIGALRM and set the 'progress_update' flag explicitly based in the input instructions. This way the progress line will be updated deterministically when the test wants it to be updated. - Specify the time elapsed since start_progress() to make the throughput rate calculations deterministic. Add the new test script 't0500-progress-display.sh' to check a few simple cases with and without throughput, and that a shorter progress line properly covers up the previously displayed line in different situations. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). [2] 1aed1a5f25 (progress: avoid empty line when breaking the progress line, 2019-05-19) Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
if (progress_testing)
return;
setitimer(ITIMER_REAL, &v, NULL);
signal(SIGALRM, SIG_IGN);
progress_update = 0;
}
static int is_foreground_fd(int fd)
{
int tpgrp = tcgetpgrp(fd);
return tpgrp < 0 || tpgrp == getpgid(0);
}
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;
Revert "progress: use term_clear_line()" This reverts commit 5b12e3123b (progress: use term_clear_line(), 2019-06-24), because covering up the entire last line while refreshing the progress line caused unexpected problems during 'git clone/fetch/push': $ git clone ssh://localhost/home/szeder/src/tmp/linux.git/ Cloning into 'linux'... remote: remote: remote: remote: Enumerating objects: 999295 The length of the progress bar line can shorten when it includes throughput and the unit changes, or when its length exceeds the width of the terminal and is broken into two lines. In these cases the previously displayed longer progress line should be covered up, because otherwise the leftover characters from the previous progress line make the output look weird [1]. term_clear_line() makes this quite simple, as it covers up the entire last line either by using an ANSI control sequence or by printing a terminal width worth of space characters, depending on whether the terminal is smart or dumb. Unfortunately, when accessing a remote repository via any non-local protocol the remote 'git receive-pack/upload-pack' processes can't possibly have any idea about the local terminal (smart of dumb? how wide?) their progress will end up on. Consequently, they assume the worst, i.e. standard-width dumb terminal, and print 80 spaces to cover up the previously displayed progress line. The local 'git clone/fetch/push' processes then display the remote's progress, including these coverup spaces, with the 'remote: ' prefix, resulting in a total line length of 88 characters. If the local terminal is narrower than that, then the coverup gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress line, but to the first column of its last line, resulting in those repeated 'remote: <many-spaces>' lines. By reverting 5b12e3123b (progress: use term_clear_line(), 2019-06-24) we won't cover up the entire last line, but go back to comparing the length of the current progress bar line with the previous one, and cover up as many characters as needed. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
int last_count_len = counters_sb->len;
if (progress->delay && (!progress_update || --progress->delay))
return;
progress->last_value = n;
tp = (progress->throughput) ? progress->throughput->display.buf : "";
if (progress->total) {
unsigned percent = n * 100 / progress->total;
if (percent != progress->last_percent || progress_update) {
progress->last_percent = percent;
strbuf_reset(counters_sb);
strbuf_addf(counters_sb,
"%3u%% (%"PRIuMAX"/%"PRIuMAX")%s", percent,
(uintmax_t)n, (uintmax_t)progress->total,
tp);
show_update = 1;
}
} else if (progress_update) {
strbuf_reset(counters_sb);
strbuf_addf(counters_sb, "%"PRIuMAX"%s", (uintmax_t)n, tp);
show_update = 1;
}
if (show_update) {
if (is_foreground_fd(fileno(stderr)) || done) {
const char *eol = done ? done : "\r";
Revert "progress: use term_clear_line()" This reverts commit 5b12e3123b (progress: use term_clear_line(), 2019-06-24), because covering up the entire last line while refreshing the progress line caused unexpected problems during 'git clone/fetch/push': $ git clone ssh://localhost/home/szeder/src/tmp/linux.git/ Cloning into 'linux'... remote: remote: remote: remote: Enumerating objects: 999295 The length of the progress bar line can shorten when it includes throughput and the unit changes, or when its length exceeds the width of the terminal and is broken into two lines. In these cases the previously displayed longer progress line should be covered up, because otherwise the leftover characters from the previous progress line make the output look weird [1]. term_clear_line() makes this quite simple, as it covers up the entire last line either by using an ANSI control sequence or by printing a terminal width worth of space characters, depending on whether the terminal is smart or dumb. Unfortunately, when accessing a remote repository via any non-local protocol the remote 'git receive-pack/upload-pack' processes can't possibly have any idea about the local terminal (smart of dumb? how wide?) their progress will end up on. Consequently, they assume the worst, i.e. standard-width dumb terminal, and print 80 spaces to cover up the previously displayed progress line. The local 'git clone/fetch/push' processes then display the remote's progress, including these coverup spaces, with the 'remote: ' prefix, resulting in a total line length of 88 characters. If the local terminal is narrower than that, then the coverup gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress line, but to the first column of its last line, resulting in those repeated 'remote: <many-spaces>' lines. By reverting 5b12e3123b (progress: use term_clear_line(), 2019-06-24) we won't cover up the entire last line, but go back to comparing the length of the current progress bar line with the previous one, and cover up as many characters as needed. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
size_t clear_len = counters_sb->len < last_count_len ?
last_count_len - counters_sb->len + 1 :
0;
/* The "+ 2" accounts for the ": ". */
size_t progress_line_len = progress->title_len +
counters_sb->len + 2;
int cols = term_columns();
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
if (progress->split) {
Revert "progress: use term_clear_line()" This reverts commit 5b12e3123b (progress: use term_clear_line(), 2019-06-24), because covering up the entire last line while refreshing the progress line caused unexpected problems during 'git clone/fetch/push': $ git clone ssh://localhost/home/szeder/src/tmp/linux.git/ Cloning into 'linux'... remote: remote: remote: remote: Enumerating objects: 999295 The length of the progress bar line can shorten when it includes throughput and the unit changes, or when its length exceeds the width of the terminal and is broken into two lines. In these cases the previously displayed longer progress line should be covered up, because otherwise the leftover characters from the previous progress line make the output look weird [1]. term_clear_line() makes this quite simple, as it covers up the entire last line either by using an ANSI control sequence or by printing a terminal width worth of space characters, depending on whether the terminal is smart or dumb. Unfortunately, when accessing a remote repository via any non-local protocol the remote 'git receive-pack/upload-pack' processes can't possibly have any idea about the local terminal (smart of dumb? how wide?) their progress will end up on. Consequently, they assume the worst, i.e. standard-width dumb terminal, and print 80 spaces to cover up the previously displayed progress line. The local 'git clone/fetch/push' processes then display the remote's progress, including these coverup spaces, with the 'remote: ' prefix, resulting in a total line length of 88 characters. If the local terminal is narrower than that, then the coverup gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress line, but to the first column of its last line, resulting in those repeated 'remote: <many-spaces>' lines. By reverting 5b12e3123b (progress: use term_clear_line(), 2019-06-24) we won't cover up the entire last line, but go back to comparing the length of the current progress bar line with the previous one, and cover up as many characters as needed. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
fprintf(stderr, " %s%*s", counters_sb->buf,
(int) clear_len, eol);
} else if (!done && cols < progress_line_len) {
clear_len = progress->title_len + 1 < cols ?
cols - progress->title_len - 1 : 0;
fprintf(stderr, "%s:%*s\n %s%s",
progress->title, (int) clear_len, "",
counters_sb->buf, eol);
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
progress->split = 1;
} else {
Revert "progress: use term_clear_line()" This reverts commit 5b12e3123b (progress: use term_clear_line(), 2019-06-24), because covering up the entire last line while refreshing the progress line caused unexpected problems during 'git clone/fetch/push': $ git clone ssh://localhost/home/szeder/src/tmp/linux.git/ Cloning into 'linux'... remote: remote: remote: remote: Enumerating objects: 999295 The length of the progress bar line can shorten when it includes throughput and the unit changes, or when its length exceeds the width of the terminal and is broken into two lines. In these cases the previously displayed longer progress line should be covered up, because otherwise the leftover characters from the previous progress line make the output look weird [1]. term_clear_line() makes this quite simple, as it covers up the entire last line either by using an ANSI control sequence or by printing a terminal width worth of space characters, depending on whether the terminal is smart or dumb. Unfortunately, when accessing a remote repository via any non-local protocol the remote 'git receive-pack/upload-pack' processes can't possibly have any idea about the local terminal (smart of dumb? how wide?) their progress will end up on. Consequently, they assume the worst, i.e. standard-width dumb terminal, and print 80 spaces to cover up the previously displayed progress line. The local 'git clone/fetch/push' processes then display the remote's progress, including these coverup spaces, with the 'remote: ' prefix, resulting in a total line length of 88 characters. If the local terminal is narrower than that, then the coverup gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress line, but to the first column of its last line, resulting in those repeated 'remote: <many-spaces>' lines. By reverting 5b12e3123b (progress: use term_clear_line(), 2019-06-24) we won't cover up the entire last line, but go back to comparing the length of the current progress bar line with the previous one, and cover up as many characters as needed. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
fprintf(stderr, "%s: %s%*s", progress->title,
counters_sb->buf, (int) clear_len, eol);
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
}
fflush(stderr);
}
progress_update = 0;
}
}
static void throughput_string(struct strbuf *buf, uint64_t total,
unsigned int rate)
{
strbuf_reset(buf);
strbuf_addstr(buf, ", ");
strbuf_humanise_bytes(buf, total);
strbuf_addstr(buf, " | ");
strbuf_humanise_rate(buf, rate * 1024);
}
Test the progress display 'progress.c' has seen a few fixes recently [1], and, unfortunately, some of those fixes required further fixes [2]. It seems it's time to have a few tests focusing on the subtleties of the progress display. Add the 'test-tool progress' subcommand to help testing the progress display, reading instructions from standard input and turning them into calls to the display_progress() and display_throughput() functions with the given parameters. The progress display is, however, critically dependent on timing, because it's only updated once every second or, if the toal is known in advance, every 1%, and there is the throughput rate as well. These make the progress display far too undeterministic for testing as-is. To address this, add a few testing-specific variables and functions to 'progress.c', allowing the the new test helper to: - Disable the triggered-every-second SIGALRM and set the 'progress_update' flag explicitly based in the input instructions. This way the progress line will be updated deterministically when the test wants it to be updated. - Specify the time elapsed since start_progress() to make the throughput rate calculations deterministic. Add the new test script 't0500-progress-display.sh' to check a few simple cases with and without throughput, and that a shorter progress line properly covers up the previously displayed line in different situations. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). [2] 1aed1a5f25 (progress: avoid empty line when breaking the progress line, 2019-05-19) Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
static uint64_t progress_getnanotime(struct progress *progress)
{
if (progress_testing)
return progress->start_ns + progress_test_ns;
else
return getnanotime();
}
void display_throughput(struct progress *progress, uint64_t total)
{
struct throughput *tp;
uint64_t now_ns;
unsigned int misecs, count, rate;
if (!progress)
return;
tp = progress->throughput;
Test the progress display 'progress.c' has seen a few fixes recently [1], and, unfortunately, some of those fixes required further fixes [2]. It seems it's time to have a few tests focusing on the subtleties of the progress display. Add the 'test-tool progress' subcommand to help testing the progress display, reading instructions from standard input and turning them into calls to the display_progress() and display_throughput() functions with the given parameters. The progress display is, however, critically dependent on timing, because it's only updated once every second or, if the toal is known in advance, every 1%, and there is the throughput rate as well. These make the progress display far too undeterministic for testing as-is. To address this, add a few testing-specific variables and functions to 'progress.c', allowing the the new test helper to: - Disable the triggered-every-second SIGALRM and set the 'progress_update' flag explicitly based in the input instructions. This way the progress line will be updated deterministically when the test wants it to be updated. - Specify the time elapsed since start_progress() to make the throughput rate calculations deterministic. Add the new test script 't0500-progress-display.sh' to check a few simple cases with and without throughput, and that a shorter progress line properly covers up the previously displayed line in different situations. [1] See commits 545dc345eb (progress: break too long progress bar lines, 2019-04-12) and 9f1fd84e15 (progress: clear previous progress update dynamically, 2019-04-12). [2] 1aed1a5f25 (progress: avoid empty line when breaking the progress line, 2019-05-19) Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
3 years ago
now_ns = progress_getnanotime(progress);
if (!tp) {
progress->throughput = CALLOC_ARRAY(tp, 1);
tp->prev_total = tp->curr_total = total;
tp->prev_ns = now_ns;
strbuf_init(&tp->display, 0);
return;
}
tp->curr_total = total;
/* only update throughput every 0.5 s */
if (now_ns - tp->prev_ns <= 500000000)
return;
/*
* We have x = bytes and y = nanosecs. We want z = KiB/s:
*
* z = (x / 1024) / (y / 1000000000)
* z = x / y * 1000000000 / 1024
* z = x / (y * 1024 / 1000000000)
* z = x / y'
*
* To simplify things we'll keep track of misecs, or 1024th of a sec
* obtained with:
*
* y' = y * 1024 / 1000000000
* y' = y * (2^10 / 2^42) * (2^42 / 1000000000)
* y' = y / 2^32 * 4398
* y' = (y * 4398) >> 32
*/
misecs = ((now_ns - tp->prev_ns) * 4398) >> 32;
count = total - tp->prev_total;
tp->prev_total = total;
tp->prev_ns = now_ns;
tp->avg_bytes += count;
tp->avg_misecs += misecs;
rate = tp->avg_bytes / tp->avg_misecs;
tp->avg_bytes -= tp->last_bytes[tp->idx];
tp->avg_misecs -= tp->last_misecs[tp->idx];
tp->last_bytes[tp->idx] = count;
tp->last_misecs[tp->idx] = misecs;
tp->idx = (tp->idx + 1) % TP_IDX_MAX;
throughput_string(&tp->display, total, rate);
if (progress->last_value != -1 && progress_update)
display(progress, progress->last_value, NULL);
}
void display_progress(struct progress *progress, uint64_t n)
{
if (progress)
display(progress, n, NULL);
}
static struct progress *start_progress_delay(const char *title, uint64_t total,
unsigned delay, unsigned sparse)
{
struct progress *progress = xmalloc(sizeof(*progress));
progress->title = title;
progress->total = total;
progress->last_value = -1;
progress->last_percent = -1;
progress->delay = delay;
progress->sparse = sparse;
progress->throughput = NULL;
progress->start_ns = getnanotime();
strbuf_init(&progress->counters_sb, 0);
progress: break too long progress bar lines Some of the recently added progress indicators have quite long titles, which might be even longer when translated to some languages, and when they are shown while operating on bigger repositories, then the progress bar grows longer than the default 80 column terminal width. When the progress bar exceeds the width of the terminal it gets line-wrapped, and after that the CR at the end doesn't return to the beginning of the progress bar, but to the first column of its last line. Consequently, the first line of the previously shown progress bar is not overwritten by the next, and we end up with a bunch of truncated progress bar lines scrolling past: $ LANG=es_ES.UTF-8 git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 2% (1599 Encontrando commits para commit graph entre los objetos empaquetados: 3% (1975 Encontrando commits para commit graph entre los objetos empaquetados: 4% (2633 Encontrando commits para commit graph entre los objetos empaquetados: 5% (3292 [...] Prevent this by breaking progress bars after the title once they exceed the width of the terminal, so the counter and optional percentage and throughput, i.e. all changing parts, are on the last line. Subsequent updates will from then on only refresh the changing parts, but not the title, and it will look like this: $ LANG=es_ES.UTF-8 ~/src/git/git commit-graph write Encontrando commits para commit graph entre los objetos empaquetados: 100% (6584502/6584502), listo. Calculando números de generación de commit graph: 100% (824705/824705), listo. Escribiendo commit graph en 4 pasos: 100% (3298820/3298820), listo. Note that the number of columns in the terminal is cached by term_columns(), so this might not kick in when it should when a terminal window is resized while the operation is running. Furthermore, this change won't help if the terminal is so narrow that the counters don't fit on one line, but I would put this in the "If it hurts, don't do it" box. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
4 years ago
progress->title_len = utf8_strwidth(title);
progress->split = 0;
set_progress_signal();
trace2_region_enter("progress", title, the_repository);
return progress;
}
static int get_default_delay(void)
{
static int delay_in_secs = -1;
if (delay_in_secs < 0)
delay_in_secs = git_env_ulong("GIT_PROGRESS_DELAY", 2);
return delay_in_secs;
}
struct progress *start_delayed_progress(const char *title, uint64_t total)
progress: simplify "delayed" progress API We used to expose the full power of the delayed progress API to the callers, so that they can specify, not just the message to show and expected total amount of work that is used to compute the percentage of work performed so far, the percent-threshold parameter P and the delay-seconds parameter N. The progress meter starts to show at N seconds into the operation only if we have not yet completed P per-cent of the total work. Most callers used either (0%, 2s) or (50%, 1s) as (P, N), but there are oddballs that chose more random-looking values like 95%. For a smoother workload, (50%, 1s) would allow us to start showing the progress meter earlier than (0%, 2s), while keeping the chance of not showing progress meter for long running operation the same as the latter. For a task that would take 2s or more to complete, it is likely that less than half of it would complete within the first second, if the workload is smooth. But for a spiky workload whose earlier part is easier, such a setting is likely to fail to show the progress meter entirely and (0%, 2s) is more appropriate. But that is merely a theory. Realistically, it is of dubious value to ask each codepath to carefully consider smoothness of their workload and specify their own setting by passing two extra parameters. Let's simplify the API by dropping both parameters and have everybody use (0%, 2s). Oh, by the way, the percent-threshold parameter and the structure member were consistently misspelled, which also is now fixed ;-) Helped-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
5 years ago
{
return start_progress_delay(title, total, get_default_delay(), 0);
progress: simplify "delayed" progress API We used to expose the full power of the delayed progress API to the callers, so that they can specify, not just the message to show and expected total amount of work that is used to compute the percentage of work performed so far, the percent-threshold parameter P and the delay-seconds parameter N. The progress meter starts to show at N seconds into the operation only if we have not yet completed P per-cent of the total work. Most callers used either (0%, 2s) or (50%, 1s) as (P, N), but there are oddballs that chose more random-looking values like 95%. For a smoother workload, (50%, 1s) would allow us to start showing the progress meter earlier than (0%, 2s), while keeping the chance of not showing progress meter for long running operation the same as the latter. For a task that would take 2s or more to complete, it is likely that less than half of it would complete within the first second, if the workload is smooth. But for a spiky workload whose earlier part is easier, such a setting is likely to fail to show the progress meter entirely and (0%, 2s) is more appropriate. But that is merely a theory. Realistically, it is of dubious value to ask each codepath to carefully consider smoothness of their workload and specify their own setting by passing two extra parameters. Let's simplify the API by dropping both parameters and have everybody use (0%, 2s). Oh, by the way, the percent-threshold parameter and the structure member were consistently misspelled, which also is now fixed ;-) Helped-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
5 years ago
}
struct progress *start_progress(const char *title, uint64_t total)
{
return start_progress_delay(title, total, 0, 0);
}
/*
* Here "sparse" means that the caller might use some sampling criteria to
* decide when to call display_progress() rather than calling it for every
* integer value in[0 .. total). In particular, the caller might not call
* display_progress() for the last value in the range.
*
* When "sparse" is set, stop_progress() will automatically force the done
* message to show 100%.
*/
struct progress *start_sparse_progress(const char *title, uint64_t total)
{
return start_progress_delay(title, total, 0, 1);
}
struct progress *start_delayed_sparse_progress(const char *title,
uint64_t total)
{
return start_progress_delay(title, total, get_default_delay(), 1);
}
static void finish_if_sparse(struct progress *progress)
{
if (progress->sparse &&
progress->last_value != progress->total)
display_progress(progress, progress->total);
}
static void force_last_update(struct progress *progress, const char *msg)
{
char *buf;
struct throughput *tp = progress->throughput;
if (tp) {
uint64_t now_ns = progress_getnanotime(progress);
unsigned int misecs, rate;
misecs = ((now_ns - progress->start_ns) * 4398) >> 32;
rate = tp->curr_total / (misecs ? misecs : 1);
throughput_string(&tp->display, tp->curr_total, rate);
}
progress_update = 1;
buf = xstrfmt(", %s.\n", msg);
display(progress, progress->last_value, buf);
free(buf);
}
static void log_trace2(struct progress *progress)
{
trace2_data_intmax("progress", the_repository, "total_objects",
progress->total);
if (progress->throughput)
trace2_data_intmax("progress", the_repository, "total_bytes",
progress->throughput->curr_total);
trace2_region_leave("progress", progress->title, the_repository);
}
void stop_progress_msg(struct progress **p_progress, const char *msg)
{
struct progress *progress;
if (!p_progress)
BUG("don't provide NULL to stop_progress_msg");
progress = *p_progress;
if (!progress)
return;
*p_progress = NULL;
finish_if_sparse(progress);
if (progress->last_value != -1)
force_last_update(progress, msg);
log_trace2(progress);
clear_progress_signal();
strbuf_release(&progress->counters_sb);
if (progress->throughput)
strbuf_release(&progress->throughput->display);
free(progress->throughput);
free(progress);
}