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config: add --fixed-value option, un-implemented

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The 'git config' builtin takes a 'value-pattern' parameter for several
actions. This can cause confusion when expecting exact value matches
instead of regex matches, especially when the input string contains
metacharacters. While callers can escape the patterns themselves, it
would be more friendly to allow an argument to disable the pattern
matching in favor of an exact string match.

Add a new '--fixed-value' option that does not currently change the
behavior. The implementation will be filled in by later changes for
each appropriate action. For now, check and test that --fixed-value
will abort the command when included with an incompatible action or
without a 'value-pattern' argument.

The name '--fixed-value' was chosen over something simpler like
'--fixed' because some commands allow regular expressions on the
key in addition to the value.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2020-11-25 22:12:53 +00:00
committed by Junio C Hamano
parent d15671943e
commit fda43942d7
3 changed files with 73 additions and 7 deletions
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36
builtin/config.c
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@ -34,6 +34,7 @@ static int respect_includes_opt = -1;
static struct config_options config_options;
static int show_origin;
static int show_scope;
static int fixed_value;
#define ACTION_GET (1<<0)
#define ACTION_GET_ALL (1<<1)
@ -144,6 +145,7 @@ static struct option builtin_config_options[] = {
OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
OPT_BOOL(0, "fixed-value", &fixed_value, N_("use string equality when comparing values to 'value-pattern'")),
OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
@ -766,6 +768,40 @@ int cmd_config(int argc, const char **argv, const char *prefix)
usage_builtin_config();
}
/* check usage of --fixed-value */
if (fixed_value) {
int allowed_usage = 0;
switch (actions) {
/* git config --get <name> <value-pattern> */
case ACTION_GET:
/* git config --get-all <name> <value-pattern> */
case ACTION_GET_ALL:
/* git config --get-regexp <name-pattern> <value-pattern> */
case ACTION_GET_REGEXP:
/* git config --unset <name> <value-pattern> */
case ACTION_UNSET:
/* git config --unset-all <name> <value-pattern> */
case ACTION_UNSET_ALL:
allowed_usage = argc > 1 && !!argv[1];
break;
/* git config <name> <value> <value-pattern> */
case ACTION_SET_ALL:
/* git config --replace-all <name> <value> <value-pattern> */
case ACTION_REPLACE_ALL:
allowed_usage = argc > 2 && !!argv[2];
break;
/* other options don't allow --fixed-value */
}
if (!allowed_usage) {
error(_("--fixed-value only applies with 'value-pattern'"));
usage_builtin_config();
}
}
if (actions & PAGING_ACTIONS)
setup_auto_pager("config", 1);