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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "pathspec.h"
#include "buf_text.h"
#include "attr_file.h"
/* what is the common non-wildcard prefix for all items in the pathspec */
char *git_pathspec_prefix(const git_strarray *pathspec)
{
git_buf prefix = GIT_BUF_INIT;
const char *scan;
if (!pathspec || !pathspec->count ||
git_buf_text_common_prefix(&prefix, pathspec) < 0)
return NULL;
/* diff prefix will only be leading non-wildcards */
for (scan = prefix.ptr; *scan; ++scan) {
if (git__iswildcard(*scan) &&
(scan == prefix.ptr || (*(scan - 1) != '\\')))
break;
}
git_buf_truncate(&prefix, scan - prefix.ptr);
if (prefix.size <= 0) {
git_buf_free(&prefix);
return NULL;
}
git_buf_text_unescape(&prefix);
return git_buf_detach(&prefix);
}
/* is there anything in the spec that needs to be filtered on */
bool git_pathspec_is_empty(const git_strarray *pathspec)
{
size_t i;
if (pathspec == NULL)
return true;
for (i = 0; i < pathspec->count; ++i) {
const char *str = pathspec->strings[i];
if (str && str[0])
return false;
}
return true;
}
/* build a vector of fnmatch patterns to evaluate efficiently */
int git_pathspec_init(
git_vector *vspec, const git_strarray *strspec, git_pool *strpool)
{
size_t i;
memset(vspec, 0, sizeof(*vspec));
if (git_pathspec_is_empty(strspec))
return 0;
if (git_vector_init(vspec, strspec->count, NULL) < 0)
return -1;
for (i = 0; i < strspec->count; ++i) {
int ret;
const char *pattern = strspec->strings[i];
git_attr_fnmatch *match = git__calloc(1, sizeof(git_attr_fnmatch));
if (!match)
return -1;
match->flags = GIT_ATTR_FNMATCH_ALLOWSPACE;
ret = git_attr_fnmatch__parse(match, strpool, NULL, &pattern);
if (ret == GIT_ENOTFOUND) {
git__free(match);
continue;
} else if (ret < 0)
return ret;
if (git_vector_insert(vspec, match) < 0)
return -1;
}
return 0;
}
/* free data from the pathspec vector */
void git_pathspec_free(git_vector *vspec)
{
git_attr_fnmatch *match;
unsigned int i;
git_vector_foreach(vspec, i, match) {
git__free(match);
vspec->contents[i] = NULL;
}
git_vector_free(vspec);
}
/* match a path against the vectorized pathspec */
bool git_pathspec_match_path(
git_vector *vspec,
const char *path,
bool disable_fnmatch,
bool casefold,
const char **matched_pathspec)
{
size_t i;
git_attr_fnmatch *match;
int fnmatch_flags = 0;
int (*use_strcmp)(const char *, const char *);
int (*use_strncmp)(const char *, const char *, size_t);
if (matched_pathspec)
*matched_pathspec = NULL;
if (!vspec || !vspec->length)
return true;
if (disable_fnmatch)
fnmatch_flags = -1;
else if (casefold)
fnmatch_flags = FNM_CASEFOLD;
if (casefold) {
use_strcmp = git__strcasecmp;
use_strncmp = git__strncasecmp;
} else {
use_strcmp = git__strcmp;
use_strncmp = git__strncmp;
}
git_vector_foreach(vspec, i, match) {
int result = (match->flags & GIT_ATTR_FNMATCH_MATCH_ALL) ? 0 : FNM_NOMATCH;
if (result == FNM_NOMATCH)
result = use_strcmp(match->pattern, path) ? FNM_NOMATCH : 0;
if (fnmatch_flags >= 0 && result == FNM_NOMATCH)
result = p_fnmatch(match->pattern, path, fnmatch_flags);
/* if we didn't match, look for exact dirname prefix match */
if (result == FNM_NOMATCH &&
(match->flags & GIT_ATTR_FNMATCH_HASWILD) == 0 &&
use_strncmp(path, match->pattern, match->length) == 0 &&
path[match->length] == '/')
result = 0;
if (result == 0) {
if (matched_pathspec)
*matched_pathspec = match->pattern;
return (match->flags & GIT_ATTR_FNMATCH_NEGATIVE) ? false : true;
}
}
return false;
}
int git_pathspec_context_init(
git_pathspec_context *ctxt, const git_strarray *paths)
{
int error = 0;
memset(ctxt, 0, sizeof(*ctxt));
ctxt->prefix = git_pathspec_prefix(paths);
if ((error = git_pool_init(&ctxt->pool, 1, 0)) < 0 ||
(error = git_pathspec_init(&ctxt->pathspec, paths, &ctxt->pool)) < 0)
git_pathspec_context_free(ctxt);
return error;
}
void git_pathspec_context_free(
git_pathspec_context *ctxt)
{
git__free(ctxt->prefix);
git_pathspec_free(&ctxt->pathspec);
git_pool_clear(&ctxt->pool);
memset(ctxt, 0, sizeof(*ctxt));
}
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