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treewide: rename 'struct exclude' to 'struct path_pattern'

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The first consumer of pattern-matching filenames was the
.gitignore feature. In that context, storing a list of patterns
as a list of 'struct exclude' items makes sense. However, the
sparse-checkout feature then adopted these structures and methods,
but with the opposite meaning: these patterns match the files
that should be included!

It would be clearer to rename this entire library as a "pattern
matching" library, and the callers apply exclusion/inclusion
logic accordingly based on their needs.

This commit renames 'struct exclude' to 'struct path_pattern'
and renames several variable names to match. 'struct pattern'
was already taken by attr.c, and this more completely describes
that the patterns are specific to file paths.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2019-09-03 11:04:55 -07:00
committed by Junio C Hamano
parent 90d21f9ebf
commit ab8db61390
3 changed files with 80 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

115
dir.c
View File

@ -602,27 +602,27 @@ void parse_exclude_pattern(const char **pattern,
void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *el, int srcpos)
{
struct exclude *x;
struct path_pattern *pattern;
int patternlen;
unsigned flags;
int nowildcardlen;
parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
if (flags & EXC_FLAG_MUSTBEDIR) {
FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
FLEXPTR_ALLOC_MEM(pattern, pattern, string, patternlen);
} else {
x = xmalloc(sizeof(*x));
x->pattern = string;
pattern = xmalloc(sizeof(*pattern));
pattern->pattern = string;
}
x->patternlen = patternlen;
x->nowildcardlen = nowildcardlen;
x->base = base;
x->baselen = baselen;
x->flags = flags;
x->srcpos = srcpos;
ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
el->excludes[el->nr++] = x;
x->el = el;
pattern->patternlen = patternlen;
pattern->nowildcardlen = nowildcardlen;
pattern->base = base;
pattern->baselen = baselen;
pattern->flags = flags;
pattern->srcpos = srcpos;
ALLOC_GROW(el->patterns, el->nr + 1, el->alloc);
el->patterns[el->nr++] = pattern;
pattern->el = el;
}
static int read_skip_worktree_file_from_index(const struct index_state *istate,
@ -651,8 +651,8 @@ void clear_exclude_list(struct exclude_list *el)
int i;
for (i = 0; i < el->nr; i++)
free(el->excludes[i]);
free(el->excludes);
free(el->patterns[i]);
free(el->patterns);
free(el->filebuf);
memset(el, 0, sizeof(*el));
@ -1021,51 +1021,54 @@ int match_pathname(const char *pathname, int pathlen,
* any, determines the fate. Returns the exclude_list element which
* matched, or NULL for undecided.
*/
static struct exclude *last_exclude_matching_from_list(const char *pathname,
static struct path_pattern *last_exclude_matching_from_list(const char *pathname,
int pathlen,
const char *basename,
int *dtype,
struct exclude_list *el,
struct index_state *istate)
{
struct exclude *exc = NULL; /* undecided */
struct path_pattern *res = NULL; /* undecided */
int i;
if (!el->nr)
return NULL; /* undefined */
for (i = el->nr - 1; 0 <= i; i--) {
struct exclude *x = el->excludes[i];
const char *exclude = x->pattern;
int prefix = x->nowildcardlen;
struct path_pattern *pattern = el->patterns[i];
const char *exclude = pattern->pattern;
int prefix = pattern->nowildcardlen;
if (x->flags & EXC_FLAG_MUSTBEDIR) {
if (pattern->flags & EXC_FLAG_MUSTBEDIR) {
if (*dtype == DT_UNKNOWN)
*dtype = get_dtype(NULL, istate, pathname, pathlen);
if (*dtype != DT_DIR)
continue;
}
if (x->flags & EXC_FLAG_NODIR) {
if (pattern->flags & EXC_FLAG_NODIR) {
if (match_basename(basename,
pathlen - (basename - pathname),
exclude, prefix, x->patternlen,
x->flags)) {
exc = x;
exclude, prefix, pattern->patternlen,
pattern->flags)) {
res = pattern;
break;
}
continue;
}
assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
assert(pattern->baselen == 0 ||
pattern->base[pattern->baselen - 1] == '/');
if (match_pathname(pathname, pathlen,
x->base, x->baselen ? x->baselen - 1 : 0,
exclude, prefix, x->patternlen, x->flags)) {
exc = x;
pattern->base,
pattern->baselen ? pattern->baselen - 1 : 0,
exclude, prefix, pattern->patternlen,
pattern->flags)) {
res = pattern;
break;
}
}
return exc;
return res;
}
/*
@ -1076,30 +1079,30 @@ int is_excluded_from_list(const char *pathname,
int pathlen, const char *basename, int *dtype,
struct exclude_list *el, struct index_state *istate)
{
struct exclude *exclude;
exclude = last_exclude_matching_from_list(pathname, pathlen, basename,
struct path_pattern *pattern;
pattern = last_exclude_matching_from_list(pathname, pathlen, basename,
dtype, el, istate);
if (exclude)
return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
if (pattern)
return pattern->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
return -1; /* undecided */
}
static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
struct index_state *istate,
const char *pathname, int pathlen, const char *basename,
int *dtype_p)
static struct path_pattern *last_exclude_matching_from_lists(
struct dir_struct *dir, struct index_state *istate,
const char *pathname, int pathlen,
const char *basename, int *dtype_p)
{
int i, j;
struct exclude_list_group *group;
struct exclude *exclude;
struct path_pattern *pattern;
for (i = EXC_CMDL; i <= EXC_FILE; i++) {
group = &dir->exclude_list_group[i];
for (j = group->nr - 1; j >= 0; j--) {
exclude = last_exclude_matching_from_list(
pattern = last_exclude_matching_from_list(
pathname, pathlen, basename, dtype_p,
&group->el[j], istate);
if (exclude)
return exclude;
if (pattern)
return pattern;
}
}
return NULL;
@ -1132,7 +1135,7 @@ static void prep_exclude(struct dir_struct *dir,
break;
el = &group->el[dir->exclude_stack->exclude_ix];
dir->exclude_stack = stk->prev;
dir->exclude = NULL;
dir->pattern = NULL;
free((char *)el->src); /* see strbuf_detach() below */
clear_exclude_list(el);
free(stk);
@ -1140,7 +1143,7 @@ static void prep_exclude(struct dir_struct *dir,
}
/* Skip traversing into sub directories if the parent is excluded */
if (dir->exclude)
if (dir->pattern)
return;
/*
@ -1189,15 +1192,15 @@ static void prep_exclude(struct dir_struct *dir,
if (stk->baselen) {
int dt = DT_DIR;
dir->basebuf.buf[stk->baselen - 1] = 0;
dir->exclude = last_exclude_matching_from_lists(dir,
dir->pattern = last_exclude_matching_from_lists(dir,
istate,
dir->basebuf.buf, stk->baselen - 1,
dir->basebuf.buf + current, &dt);
dir->basebuf.buf[stk->baselen - 1] = '/';
if (dir->exclude &&
dir->exclude->flags & EXC_FLAG_NEGATIVE)
dir->exclude = NULL;
if (dir->exclude) {
if (dir->pattern &&
dir->pattern->flags & EXC_FLAG_NEGATIVE)
dir->pattern = NULL;
if (dir->pattern) {
dir->exclude_stack = stk;
return;
}
@ -1223,7 +1226,7 @@ static void prep_exclude(struct dir_struct *dir,
/*
* dir->basebuf gets reused by the traversal, but we
* need fname to remain unchanged to ensure the src
* member of each struct exclude correctly
* member of each struct path_pattern correctly
* back-references its source file. Other invocations
* of add_exclude_list provide stable strings, so we
* strbuf_detach() and free() here in the caller.
@ -1266,7 +1269,7 @@ static void prep_exclude(struct dir_struct *dir,
* Returns the exclude_list element which matched, or NULL for
* undecided.
*/
struct exclude *last_exclude_matching(struct dir_struct *dir,
struct path_pattern *last_exclude_matching(struct dir_struct *dir,
struct index_state *istate,
const char *pathname,
int *dtype_p)
@ -1277,8 +1280,8 @@ struct exclude *last_exclude_matching(struct dir_struct *dir,
prep_exclude(dir, istate, pathname, basename-pathname);
if (dir->exclude)
return dir->exclude;
if (dir->pattern)
return dir->pattern;
return last_exclude_matching_from_lists(dir, istate, pathname, pathlen,
basename, dtype_p);
@ -1292,10 +1295,10 @@ struct exclude *last_exclude_matching(struct dir_struct *dir,
int is_excluded(struct dir_struct *dir, struct index_state *istate,
const char *pathname, int *dtype_p)
{
struct exclude *exclude =
struct path_pattern *pattern =
last_exclude_matching(dir, istate, pathname, dtype_p);
if (exclude)
return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
if (pattern)
return pattern->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
return 0;
}