Am 27.05.2017 um 23:46 schrieb Jeff King:
> On Sat, May 27, 2017 at 06:57:08PM +0200, Ævar Arnfjörð Bjarmason wrote:
>
>> There's another test which breaks if we just s/gmtime/localtime/g. As
>> far as I can tell to make the non-local case work we'd need to do a
>> whole dance where we set the TZ variable to e.g. UTC$offset, then call
>> strftime(), then call it again. Maybe there's some way to just specify
>> the tz offset, but I didn't find any in a quick skimming of time.h.
>
> There isn't.
Right. We could handle %z internally, though. %Z would be harder (left
as an exercise for readers..).
First we'd have to undo 0a0416a3 (strbuf_expand: convert "%%" to "%"),
though, in order to give full control back to strbuf_expand callbacks.
2-pack patch:
--- >8 ---
builtin/cat-file.c | 5 +++++
convert.c | 1 +
daemon.c | 3 +++
date.c | 2 +-
ll-merge.c | 5 +++--
pretty.c | 3 +++
strbuf.c | 39 ++++++++++++++++++++++++++++++---------
strbuf.h | 11 +++++------
t/t6006-rev-list-format.sh | 12 ++++++++++++
9 files changed, 63 insertions(+), 18 deletions(-)
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 1890d7a639..9cf2e4291d 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -252,6 +252,11 @@ static size_t expand_format(struct strbuf *sb, const char
*start, void *data)
{
const char *end;
+ if (*start == '%') {
+ strbuf_addch(sb, '%');
+ return 1;
+ }
+
if (*start != '(')
return 0;
end = strchr(start + 1, ')');
diff --git a/convert.c b/convert.c
index 8d652bf27c..8336fff694 100644
--- a/convert.c
+++ b/convert.c
@@ -399,6 +399,7 @@ static int filter_buffer_or_fd(int in, int out, void *data)
struct strbuf path = STRBUF_INIT;
struct strbuf_expand_dict_entry dict[] = {
{ "f", NULL, },
+ { "%", "%" },
{ NULL, NULL, },
};
diff --git a/daemon.c b/daemon.c
index ac7181a483..191fac2716 100644
--- a/daemon.c
+++ b/daemon.c
@@ -148,6 +148,9 @@ static size_t expand_path(struct strbuf *sb, const char
*placeholder, void *ctx)
case 'D':
strbuf_addstr(sb, context->directory);
return 1;
+ case '%':
+ strbuf_addch(sb, '%');
+ return 1;
}
return 0;
}
diff --git a/date.c b/date.c
index 63fa99685e..d16a88eea5 100644
--- a/date.c
+++ b/date.c
@@ -246,7 +246,7 @@ const char *show_date(timestamp_t time, int tz, const
struct date_mode *mode)
month_names[tm->tm_mon], tm->tm_year + 1900,
tm->tm_hour, tm->tm_min, tm->tm_sec, tz);
else if (mode->type == DATE_STRFTIME)
- strbuf_addftime(&timebuf, mode->strftime_fmt, tm);
+ strbuf_addftime(&timebuf, mode->strftime_fmt, tm, tz);
else
strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d",
weekday_names[tm->tm_wday],
diff --git a/ll-merge.c b/ll-merge.c
index ac0d4a5d78..e6202c7397 100644
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -172,7 +172,7 @@ static int ll_ext_merge(const struct ll_merge_driver *fn,
{
char temp[4][50];
struct strbuf cmd = STRBUF_INIT;
- struct strbuf_expand_dict_entry dict[6];
+ struct strbuf_expand_dict_entry dict[7];
struct strbuf path_sq = STRBUF_INIT;
const char *args[] = { NULL, NULL };
int status, fd, i;
@@ -185,7 +185,8 @@ static int ll_ext_merge(const struct ll_merge_driver *fn,
dict[2].placeholder = "B"; dict[2].value = temp[2];
dict[3].placeholder = "L"; dict[3].value = temp[3];
dict[4].placeholder = "P"; dict[4].value = path_sq.buf;
- dict[5].placeholder = NULL; dict[5].value = NULL;
+ dict[5].placeholder = "%"; dict[5].value = "%";
+ dict[6].placeholder = NULL; dict[6].value = NULL;
if (fn->cmdline == NULL)
die("custom merge driver %s lacks command line.", fn->name);
diff --git a/pretty.c b/pretty.c
index 587d48371b..56872bfa25 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1428,6 +1428,9 @@ static size_t format_commit_item(struct strbuf *sb, /* in
UTF-8 */
} magic = NO_MAGIC;
switch (placeholder[0]) {
+ case '%':
+ strbuf_addch(sb, '%');
+ return 1;
case '-':
magic = DEL_LF_BEFORE_EMPTY;
break;
diff --git a/strbuf.c b/strbuf.c
index 00457940cf..206dff6037 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -309,12 +309,6 @@ void strbuf_expand(struct strbuf *sb, const char *format,
expand_fn_t fn,
break;
format = percent + 1;
- if (*format == '%') {
- strbuf_addch(sb, '%');
- format++;
- continue;
- }
-
consumed = fn(sb, format, context);
if (consumed)
format += consumed;
@@ -785,7 +779,28 @@ char *xstrfmt(const char *fmt, ...)
return ret;
}
-void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm)
+struct date_format_context {
+ int tz;
+};
+
+static size_t expand_date_format(struct strbuf *sb, const char *placeholder,
+ void *ctx)
+{
+ struct date_format_context *c = ctx;
+
+ switch (placeholder[0]) {
+ case '%':
+ strbuf_addstr(sb, "%%");
+ return 1;
+ case 'z':
+ strbuf_addf(sb, "%+05d", c->tz);
+ return 1;
+ }
+ return 0;
+}
+
+void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
+ int tz)
{
size_t hint = 128;
size_t len;
@@ -794,7 +809,10 @@ void strbuf_addftime(struct strbuf *sb, const char *fmt,
const struct tm *tm)
return;
strbuf_grow(sb, hint);
- len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
+ if (strstr(fmt, "%z"))
+ len = 0;
+ else
+ len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
if (!len) {
/*
@@ -805,7 +823,10 @@ void strbuf_addftime(struct strbuf *sb, const char *fmt,
const struct tm *tm)
* character before returning.
*/
struct strbuf munged_fmt = STRBUF_INIT;
- strbuf_addf(&munged_fmt, "%s ", fmt);
+ struct date_format_context ctx;
+ ctx.tz = tz;
+ strbuf_expand(&munged_fmt, fmt, expand_date_format, &ctx);
+ strbuf_addch(&munged_fmt, ' ');
while (!len) {
hint *= 2;
strbuf_grow(sb, hint);
diff --git a/strbuf.h b/strbuf.h
index 80047b1bb7..fc4c796a2b 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -281,10 +281,6 @@ extern void strbuf_adddup(struct strbuf *sb, size_t pos,
size_t len);
* the length of the placeholder recognized and `strbuf_expand()` skips
* over it.
*
- * The format `%%` is automatically expanded to a single `%` as a quoting
- * mechanism; callers do not need to handle the `%` placeholder themselves,
- * and the callback function will not be invoked for this placeholder.
- *
* All other characters (non-percent and not skipped ones) are copied
* verbatim to the strbuf. If the callback returned zero, meaning that the
* placeholder is unknown, then the percent sign is copied, too.
@@ -339,9 +335,12 @@ __attribute__((format (printf,2,0)))
extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
/**
- * Add the time specified by `tm`, as formatted by `strftime`.
+ * Add the time specified by `tm` and `tz`, as formatted by `strftime`.
+ * The time zone offset is specified like hhmm, so e.g. -600 means six
+ * hours west of Greenwich.
*/
-extern void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct
tm *tm);
+extern void strbuf_addftime(struct strbuf *sb, const char *fmt,
+ const struct tm *tm, int tz);
/**
* Read a given size of data from a FILE* pointer to the buffer.
diff --git a/t/t6006-rev-list-format.sh b/t/t6006-rev-list-format.sh
index a1dcdb81d7..dc0bed8d90 100755
--- a/t/t6006-rev-list-format.sh
+++ b/t/t6006-rev-list-format.sh
@@ -483,4 +483,16 @@ test_expect_success 'unused %G placeholders are passed
through' '
test_cmp expect actual
'
+test_expect_success 'date format "%F %T %z" is the same as iso' '
+ git log -1 --format="%ad" --date=iso >expect &&
+ git log -1 --format="%ad" --date="format:%F %T %z" >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'date format "%%z" expands to percent zed' '
+ echo "%z" >expect &&
+ git log -1 --format="%ad" --date="format:%%z" >actual &&
+ test_cmp expect actual
+'
+
test_done
