From: Linus Arver <linusa@xxxxxxxxxx>
Do not use *_DEFAULT as a suffix to the enums, because the word
"default" is overloaded. The following are two examples of the ambiguity
of the word "default":
(1) "Default" can mean using the "default" values that are hardcoded
in trailer.c as
default_conf_info.where = WHERE_END;
default_conf_info.if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
default_conf_info.if_missing = MISSING_ADD;
in ensure_configured(). These values are referred to as "the
default" in the docs for interpret-trailers. These defaults are used
if no "trailer.*" configurations are defined.
(2) "Default" can also mean the "trailer.*" configurations themselves,
because these configurations are used by "default" (ahead of the
hardcoded defaults in (1)) if no command line arguments are
provided.
In addition, the corresponding *_DEFAULT values are chosen when the user
provides the "--no-where", "--no-if-exists", or "--no-if-missing" flags
on the command line. These "--no-*" flags are used to clear previously
provided flags of the form "--where", "--if-exists", and "--if-missing".
Using these "--no-*" flags undoes the specifying of these flags (if
any), so using the word "UNSPECIFIED" is more natural here.
So instead of using "*_DEFAULT", use "*_UNSPECIFIED" because this
signals to the reader that the *_UNSPECIFIED value by itself carries no
meaning (it's a zero value and by itself does not "default" to anything,
necessitating the need to have some other way of getting to a useful
value).
Signed-off-by: Linus Arver <linusa@xxxxxxxxxx>
---
trailer.c | 17 ++++++++++-------
trailer.h | 6 +++---
2 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/trailer.c b/trailer.c
index 3b9ce199636..c49826decae 100644
--- a/trailer.c
+++ b/trailer.c
@@ -388,7 +388,7 @@ static void process_trailers_lists(struct list_head *head,
int trailer_set_where(enum trailer_where *item, const char *value)
{
if (!value)
- *item = WHERE_DEFAULT;
+ *item = WHERE_UNSPECIFIED;
else if (!strcasecmp("after", value))
*item = WHERE_AFTER;
else if (!strcasecmp("before", value))
@@ -405,7 +405,7 @@ int trailer_set_where(enum trailer_where *item, const char *value)
int trailer_set_if_exists(enum trailer_if_exists *item, const char *value)
{
if (!value)
- *item = EXISTS_DEFAULT;
+ *item = EXISTS_UNSPECIFIED;
else if (!strcasecmp("addIfDifferent", value))
*item = EXISTS_ADD_IF_DIFFERENT;
else if (!strcasecmp("addIfDifferentNeighbor", value))
@@ -424,7 +424,7 @@ int trailer_set_if_exists(enum trailer_if_exists *item, const char *value)
int trailer_set_if_missing(enum trailer_if_missing *item, const char *value)
{
if (!value)
- *item = MISSING_DEFAULT;
+ *item = MISSING_UNSPECIFIED;
else if (!strcasecmp("doNothing", value))
*item = MISSING_DO_NOTHING;
else if (!strcasecmp("add", value))
@@ -586,7 +586,10 @@ static void ensure_configured(void)
if (configured)
return;
- /* Default config must be setup first */
+ /*
+ * Default config must be setup first. These defaults are used if there
+ * are no "trailer.*" or "trailer.<token>.*" options configured.
+ */
default_conf_info.where = WHERE_END;
default_conf_info.if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
default_conf_info.if_missing = MISSING_ADD;
@@ -701,11 +704,11 @@ static void add_arg_item(struct list_head *arg_head, char *tok, char *val,
new_item->value = val;
duplicate_conf(&new_item->conf, conf);
if (new_trailer_item) {
- if (new_trailer_item->where != WHERE_DEFAULT)
+ if (new_trailer_item->where != WHERE_UNSPECIFIED)
new_item->conf.where = new_trailer_item->where;
- if (new_trailer_item->if_exists != EXISTS_DEFAULT)
+ if (new_trailer_item->if_exists != EXISTS_UNSPECIFIED)
new_item->conf.if_exists = new_trailer_item->if_exists;
- if (new_trailer_item->if_missing != MISSING_DEFAULT)
+ if (new_trailer_item->if_missing != MISSING_UNSPECIFIED)
new_item->conf.if_missing = new_trailer_item->if_missing;
}
list_add_tail(&new_item->list, arg_head);
diff --git a/trailer.h b/trailer.h
index db57e028650..924cf5405c6 100644
--- a/trailer.h
+++ b/trailer.h
@@ -5,14 +5,14 @@
#include "strbuf.h"
enum trailer_where {
- WHERE_DEFAULT,
+ WHERE_UNSPECIFIED,
WHERE_END,
WHERE_AFTER,
WHERE_BEFORE,
WHERE_START
};
enum trailer_if_exists {
- EXISTS_DEFAULT,
+ EXISTS_UNSPECIFIED,
EXISTS_ADD_IF_DIFFERENT_NEIGHBOR,
EXISTS_ADD_IF_DIFFERENT,
EXISTS_ADD,
@@ -20,7 +20,7 @@ enum trailer_if_exists {
EXISTS_DO_NOTHING
};
enum trailer_if_missing {
- MISSING_DEFAULT,
+ MISSING_UNSPECIFIED,
MISSING_ADD,
MISSING_DO_NOTHING
};
--
gitgitgadget
