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merge-ort: record stage and auxiliary info for every path

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Create a helper function, setup_path_info(), which can be used to record
all the information we want in a merged_info or conflict_info.  While
there is currently only one caller of this new function, and some of its
particular parameters are fixed, future callers of this function will be
added later.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2020-12-13 08:04:16 +00:00 committed by Junio C Hamano
parent 34e557af54
commit 98bf984167
1 changed files with 90 additions and 7 deletions
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97
merge-ort.c
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@ -185,6 +185,26 @@ struct conflict_info {
unsigned match_mask:3;
};
/*
* For the next three macros, see warning for conflict_info.merged.
*
* In each of the below, mi is a struct merged_info*, and ci was defined
* as a struct conflict_info* (but we need to verify ci isn't actually
* pointed at a struct merged_info*).
*
* INITIALIZE_CI: Assign ci to mi but only if it's safe; set to NULL otherwise.
* VERIFY_CI: Ensure that something we assigned to a conflict_info* is one.
* ASSIGN_AND_VERIFY_CI: Similar to VERIFY_CI but do assignment first.
*/
#define INITIALIZE_CI(ci, mi) do { \
(ci) = (!(mi) || (mi)->clean) ? NULL : (struct conflict_info *)(mi); \
} while (0)
#define VERIFY_CI(ci) assert(ci && !ci->merged.clean);
#define ASSIGN_AND_VERIFY_CI(ci, mi) do { \
(ci) = (struct conflict_info *)(mi); \
assert((ci) && !(mi)->clean); \
} while (0)
static int err(struct merge_options *opt, const char *err, ...)
{
va_list params;
@ -201,6 +221,65 @@ static int err(struct merge_options *opt, const char *err, ...)
return -1;
}
static void setup_path_info(struct merge_options *opt,
struct string_list_item *result,
const char *current_dir_name,
int current_dir_name_len,
char *fullpath, /* we'll take over ownership */
struct name_entry *names,
struct name_entry *merged_version,
unsigned is_null, /* boolean */
unsigned df_conflict, /* boolean */
unsigned filemask,
unsigned dirmask,
int resolved /* boolean */)
{
/* result->util is void*, so mi is a convenience typed variable */
struct merged_info *mi;
assert(!is_null || resolved);
assert(!df_conflict || !resolved); /* df_conflict implies !resolved */
assert(resolved == (merged_version != NULL));
mi = xcalloc(1, resolved ? sizeof(struct merged_info) :
sizeof(struct conflict_info));
mi->directory_name = current_dir_name;
mi->basename_offset = current_dir_name_len;
mi->clean = !!resolved;
if (resolved) {
mi->result.mode = merged_version->mode;
oidcpy(&mi->result.oid, &merged_version->oid);
mi->is_null = !!is_null;
} else {
int i;
struct conflict_info *ci;
ASSIGN_AND_VERIFY_CI(ci, mi);
for (i = MERGE_BASE; i <= MERGE_SIDE2; i++) {
ci->pathnames[i] = fullpath;
ci->stages[i].mode = names[i].mode;
oidcpy(&ci->stages[i].oid, &names[i].oid);
}
ci->filemask = filemask;
ci->dirmask = dirmask;
ci->df_conflict = !!df_conflict;
if (dirmask)
/*
* Assume is_null for now, but if we have entries
* under the directory then when it is complete in
* write_completed_directory() it'll update this.
* Also, for D/F conflicts, we have to handle the
* directory first, then clear this bit and process
* the file to see how it is handled -- that occurs
* near the top of process_entry().
*/
mi->is_null = 1;
}
strmap_put(&opt->priv->paths, fullpath, mi);
result->string = fullpath;
result->util = mi;
}
static int collect_merge_info_callback(int n,
unsigned long mask,
unsigned long dirmask,
@ -215,10 +294,12 @@ static int collect_merge_info_callback(int n,
*/
struct merge_options *opt = info->data;
struct merge_options_internal *opti = opt->priv;
struct conflict_info *ci;
struct string_list_item pi; /* Path Info */
struct conflict_info *ci; /* typed alias to pi.util (which is void*) */
struct name_entry *p;
size_t len;
char *fullpath;
const char *dirname = opti->current_dir_name;
unsigned filemask = mask & ~dirmask;
unsigned match_mask = 0; /* will be updated below */
unsigned mbase_null = !(mask & 1);
@ -287,13 +368,15 @@ static int collect_merge_info_callback(int n,
make_traverse_path(fullpath, len + 1, info, p->path, p->pathlen);
/*
* TODO: record information about the path other than all zeros,
* so we can resolve later in process_entries.
* Record information about the path so we can resolve later in
* process_entries.
*/
ci = xcalloc(1, sizeof(struct conflict_info));
ci->df_conflict = df_conflict;
setup_path_info(opt, &pi, dirname, info->pathlen, fullpath,
names, NULL, 0, df_conflict, filemask, dirmask, 0);
ci = pi.util;
VERIFY_CI(ci);
ci->match_mask = match_mask;
strmap_put(&opti->paths, fullpath, ci);
/* If dirmask, recurse into subdirectories */
if (dirmask) {
@ -337,7 +420,7 @@ static int collect_merge_info_callback(int n,
}
original_dir_name = opti->current_dir_name;
opti->current_dir_name = fullpath;
opti->current_dir_name = pi.string;
ret = traverse_trees(NULL, 3, t, &newinfo);
opti->current_dir_name = original_dir_name;