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update-index: add --show-index-version

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"git update-index --index-version N" is used to set the index format
version to a specific version, but there was no way to query the
current version used in the on-disk index file.

Teach the command a new "--show-index-version" option, and also
teach the "--index-version N" option to report what the version was
when run with the "--verbose" option.

Helped-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2023-09-12 12:32:34 -07:00
parent 764b2330db
commit 606e088d5d
3 changed files with 49 additions and 7 deletions
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19
builtin/update-index.c
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@ -1089,6 +1089,8 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
resolve_undo_clear_callback),
OPT_INTEGER(0, "index-version", &preferred_index_format,
N_("write index in this format")),
OPT_SET_INT(0, "show-index-version", &preferred_index_format,
N_("report on-disk index format version"), -1),
OPT_BOOL(0, "split-index", &split_index,
N_("enable or disable split index")),
OPT_BOOL(0, "untracked-cache", &untracked_cache,
@ -1181,15 +1183,20 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
if (preferred_index_format) {
if (preferred_index_format < INDEX_FORMAT_LB ||
INDEX_FORMAT_UB < preferred_index_format)
if (preferred_index_format < 0) {
printf(_("%d\n"), the_index.version);
} else if (preferred_index_format < INDEX_FORMAT_LB ||
INDEX_FORMAT_UB < preferred_index_format) {
die("index-version %d not in range: %d..%d",
preferred_index_format,
INDEX_FORMAT_LB, INDEX_FORMAT_UB);
if (the_index.version != preferred_index_format)
the_index.cache_changed |= SOMETHING_CHANGED;
the_index.version = preferred_index_format;
} else {
if (the_index.version != preferred_index_format)
the_index.cache_changed |= SOMETHING_CHANGED;
report(_("index-version: was %d, set to %d"),
the_index.version, preferred_index_format);
the_index.version = preferred_index_format;
}
}
if (read_from_stdin) {