/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* 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 "iterator.h"
#include "tree.h"
#include "ignore.h"
#include "buffer.h"
#include "git2/submodule.h"
#define ITERATOR_BASE_INIT(P,NAME_LC,NAME_UC) do { \
(P) = git__calloc(1, sizeof(NAME_LC ## _iterator)); \
GITERR_CHECK_ALLOC(P); \
(P)->base.type = GIT_ITERATOR_ ## NAME_UC; \
(P)->base.start = start ? git__strdup(start) : NULL; \
(P)->base.end = end ? git__strdup(end) : NULL; \
(P)->base.current = NAME_LC ## _iterator__current; \
(P)->base.at_end = NAME_LC ## _iterator__at_end; \
(P)->base.advance = NAME_LC ## _iterator__advance; \
(P)->base.seek = NAME_LC ## _iterator__seek; \
(P)->base.reset = NAME_LC ## _iterator__reset; \
(P)->base.free = NAME_LC ## _iterator__free; \
if ((start && !(P)->base.start) || (end && !(P)->base.end)) \
return -1; \
} while (0)
static int empty_iterator__no_item(
git_iterator *iter, const git_index_entry **entry)
{
GIT_UNUSED(iter);
*entry = NULL;
return 0;
}
static int empty_iterator__at_end(git_iterator *iter)
{
GIT_UNUSED(iter);
return 1;
}
static int empty_iterator__noop(git_iterator *iter)
{
GIT_UNUSED(iter);
return 0;
}
static int empty_iterator__seek(git_iterator *iter, const char *prefix)
{
GIT_UNUSED(iter);
GIT_UNUSED(prefix);
return -1;
}
static void empty_iterator__free(git_iterator *iter)
{
GIT_UNUSED(iter);
}
int git_iterator_for_nothing(git_iterator **iter)
{
git_iterator *i = git__calloc(1, sizeof(git_iterator));
GITERR_CHECK_ALLOC(i);
i->type = GIT_ITERATOR_EMPTY;
i->current = empty_iterator__no_item;
i->at_end = empty_iterator__at_end;
i->advance = empty_iterator__no_item;
i->seek = empty_iterator__seek;
i->reset = empty_iterator__noop;
i->free = empty_iterator__free;
*iter = i;
return 0;
}
typedef struct tree_iterator_frame tree_iterator_frame;
struct tree_iterator_frame {
tree_iterator_frame *next;
git_tree *tree;
char *start;
unsigned int index;
};
typedef struct {
git_iterator base;
git_repository *repo;
tree_iterator_frame *stack;
git_index_entry entry;
git_buf path;
bool path_has_filename;
} tree_iterator;
static const git_tree_entry *tree_iterator__tree_entry(tree_iterator *ti)
{
return (ti->stack == NULL) ? NULL :
git_tree_entry_byindex(ti->stack->tree, ti->stack->index);
}
static char *tree_iterator__current_filename(
tree_iterator *ti, const git_tree_entry *te)
{
if (!ti->path_has_filename) {
if (git_buf_joinpath(&ti->path, ti->path.ptr, te->filename) < 0)
return NULL;
ti->path_has_filename = true;
}
return ti->path.ptr;
}
static void tree_iterator__pop_frame(tree_iterator *ti)
{
tree_iterator_frame *tf = ti->stack;
ti->stack = tf->next;
if (ti->stack != NULL) /* don't free the initial tree */
git_tree_free(tf->tree);
git__free(tf);
}
static int tree_iterator__to_end(tree_iterator *ti)
{
while (ti->stack && ti->stack->next)
tree_iterator__pop_frame(ti);
if (ti->stack)
ti->stack->index = git_tree_entrycount(ti->stack->tree);
return 0;
}
static int tree_iterator__current(
git_iterator *self, const git_index_entry **entry)
{
tree_iterator *ti = (tree_iterator *)self;
const git_tree_entry *te = tree_iterator__tree_entry(ti);
if (entry)
*entry = NULL;
if (te == NULL)
return 0;
ti->entry.mode = te->attr;
git_oid_cpy(&ti->entry.oid, &te->oid);
ti->entry.path = tree_iterator__current_filename(ti, te);
if (ti->entry.path == NULL)
return -1;
if (ti->base.end && git__prefixcmp(ti->entry.path, ti->base.end) > 0)
return tree_iterator__to_end(ti);
if (entry)
*entry = &ti->entry;
return 0;
}
static int tree_iterator__at_end(git_iterator *self)
{
return (tree_iterator__tree_entry((tree_iterator *)self) == NULL);
}
static tree_iterator_frame *tree_iterator__alloc_frame(
git_tree *tree, char *start)
{
tree_iterator_frame *tf = git__calloc(1, sizeof(tree_iterator_frame));
if (!tf)
return NULL;
tf->tree = tree;
if (start && *start) {
tf->start = start;
tf->index = git_tree__prefix_position(tree, start);
}
return tf;
}
static int tree_iterator__expand_tree(tree_iterator *ti)
{
int error;
git_tree *subtree;
const git_tree_entry *te = tree_iterator__tree_entry(ti);
tree_iterator_frame *tf;
char *relpath;
while (te != NULL && git_tree_entry__is_tree(te)) {
if (git_buf_joinpath(&ti->path, ti->path.ptr, te->filename) < 0)
return -1;
/* check that we have not passed the range end */
if (ti->base.end != NULL &&
git__prefixcmp(ti->path.ptr, ti->base.end) > 0)
return tree_iterator__to_end(ti);
if ((error = git_tree_lookup(&subtree, ti->repo, &te->oid)) < 0)
return error;
relpath = NULL;
/* apply range start to new frame if relevant */
if (ti->stack->start &&
git__prefixcmp(ti->stack->start, te->filename) == 0)
{
size_t namelen = strlen(te->filename);
if (ti->stack->start[namelen] == '/')
relpath = ti->stack->start + namelen + 1;
}
if ((tf = tree_iterator__alloc_frame(subtree, relpath)) == NULL)
return -1;
tf->next = ti->stack;
ti->stack = tf;
te = tree_iterator__tree_entry(ti);
}
return 0;
}
static int tree_iterator__advance(
git_iterator *self, const git_index_entry **entry)
{
int error = 0;
tree_iterator *ti = (tree_iterator *)self;
const git_tree_entry *te = NULL;
if (entry != NULL)
*entry = NULL;
if (ti->path_has_filename) {
git_buf_rtruncate_at_char(&ti->path, '/');
ti->path_has_filename = false;
}
while (ti->stack != NULL) {
te = git_tree_entry_byindex(ti->stack->tree, ++ti->stack->index);
if (te != NULL)
break;
tree_iterator__pop_frame(ti);
git_buf_rtruncate_at_char(&ti->path, '/');
}
if (te && git_tree_entry__is_tree(te))
error = tree_iterator__expand_tree(ti);
if (!error)
error = tree_iterator__current(self, entry);
return error;
}
static int tree_iterator__seek(git_iterator *self, const char *prefix)
{
GIT_UNUSED(self);
GIT_UNUSED(prefix);
/* pop stack until matches prefix */
/* seek item in current frame matching prefix */
/* push stack which matches prefix */
return -1;
}
static void tree_iterator__free(git_iterator *self)
{
tree_iterator *ti = (tree_iterator *)self;
while (ti->stack != NULL)
tree_iterator__pop_frame(ti);
git_buf_free(&ti->path);
}
static int tree_iterator__reset(git_iterator *self)
{
tree_iterator *ti = (tree_iterator *)self;
while (ti->stack && ti->stack->next)
tree_iterator__pop_frame(ti);
if (ti->stack)
ti->stack->index =
git_tree__prefix_position(ti->stack->tree, ti->base.start);
git_buf_clear(&ti->path);
return tree_iterator__expand_tree(ti);
}
int git_iterator_for_tree_range(
git_iterator **iter,
git_repository *repo,
git_tree *tree,
const char *start,
const char *end)
{
int error;
tree_iterator *ti;
if (tree == NULL)
return git_iterator_for_nothing(iter);
ITERATOR_BASE_INIT(ti, tree, TREE);
ti->repo = repo;
ti->stack = tree_iterator__alloc_frame(tree, ti->base.start);
if ((error = tree_iterator__expand_tree(ti)) < 0)
git_iterator_free((git_iterator *)ti);
else
*iter = (git_iterator *)ti;
return error;
}
typedef struct {
git_iterator base;
git_index *index;
unsigned int current;
} index_iterator;
static int index_iterator__current(
git_iterator *self, const git_index_entry **entry)
{
index_iterator *ii = (index_iterator *)self;
git_index_entry *ie = git_index_get(ii->index, ii->current);
if (ie != NULL &&
ii->base.end != NULL &&
git__prefixcmp(ie->path, ii->base.end) > 0)
{
ii->current = git_index_entrycount(ii->index);
ie = NULL;
}
if (entry)
*entry = ie;
return 0;
}
static int index_iterator__at_end(git_iterator *self)
{
index_iterator *ii = (index_iterator *)self;
return (ii->current >= git_index_entrycount(ii->index));
}
static int index_iterator__advance(
git_iterator *self, const git_index_entry **entry)
{
index_iterator *ii = (index_iterator *)self;
if (ii->current < git_index_entrycount(ii->index))
ii->current++;
return index_iterator__current(self, entry);
}
static int index_iterator__seek(git_iterator *self, const char *prefix)
{
GIT_UNUSED(self);
GIT_UNUSED(prefix);
/* find last item before prefix */
return -1;
}
static int index_iterator__reset(git_iterator *self)
{
index_iterator *ii = (index_iterator *)self;
ii->current = 0;
return 0;
}
static void index_iterator__free(git_iterator *self)
{
index_iterator *ii = (index_iterator *)self;
git_index_free(ii->index);
ii->index = NULL;
}
int git_iterator_for_index_range(
git_iterator **iter,
git_repository *repo,
const char *start,
const char *end)
{
int error;
index_iterator *ii;
ITERATOR_BASE_INIT(ii, index, INDEX);
if ((error = git_repository_index(&ii->index, repo)) < 0)
git__free(ii);
else {
ii->current = start ? git_index__prefix_position(ii->index, start) : 0;
*iter = (git_iterator *)ii;
}
return error;
}
typedef struct workdir_iterator_frame workdir_iterator_frame;
struct workdir_iterator_frame {
workdir_iterator_frame *next;
git_vector entries;
unsigned int index;
char *start;
};
typedef struct {
git_iterator base;
git_repository *repo;
size_t root_len;
workdir_iterator_frame *stack;
git_ignores ignores;
git_index_entry entry;
git_buf path;
int is_ignored;
} workdir_iterator;
static workdir_iterator_frame *workdir_iterator__alloc_frame(void)
{
workdir_iterator_frame *wf = git__calloc(1, sizeof(workdir_iterator_frame));
if (wf == NULL)
return NULL;
if (git_vector_init(&wf->entries, 0, git_path_with_stat_cmp) != 0) {
git__free(wf);
return NULL;
}
return wf;
}
static void workdir_iterator__free_frame(workdir_iterator_frame *wf)
{
unsigned int i;
git_path_with_stat *path;
git_vector_foreach(&wf->entries, i, path)
git__free(path);
git_vector_free(&wf->entries);
git__free(wf);
}
static int workdir_iterator__update_entry(workdir_iterator *wi);
static int workdir_iterator__entry_cmp(const void *prefix, const void *item)
{
const git_path_with_stat *ps = item;
return git__prefixcmp((const char *)prefix, ps->path);
}
static int workdir_iterator__expand_dir(workdir_iterator *wi)
{
int error;
workdir_iterator_frame *wf = workdir_iterator__alloc_frame();
GITERR_CHECK_ALLOC(wf);
error = git_path_dirload_with_stat(wi->path.ptr, wi->root_len, &wf->entries);
if (error < 0 || wf->entries.length == 0) {
workdir_iterator__free_frame(wf);
return GIT_ENOTFOUND;
}
git_vector_sort(&wf->entries);
if (!wi->stack)
wf->start = wi->base.start;
else if (wi->stack->start &&
git__prefixcmp(wi->stack->start, wi->path.ptr + wi->root_len) == 0)
wf->start = wi->stack->start;
if (wf->start)
git_vector_bsearch3(
&wf->index, &wf->entries, workdir_iterator__entry_cmp, wf->start);
wf->next = wi->stack;
wi->stack = wf;
/* only push new ignores if this is not top level directory */
if (wi->stack->next != NULL) {
ssize_t slash_pos = git_buf_rfind_next(&wi->path, '/');
(void)git_ignore__push_dir(&wi->ignores, &wi->path.ptr[slash_pos + 1]);
}
return workdir_iterator__update_entry(wi);
}
static int workdir_iterator__current(
git_iterator *self, const git_index_entry **entry)
{
workdir_iterator *wi = (workdir_iterator *)self;
*entry = (wi->entry.path == NULL) ? NULL : &wi->entry;
return 0;
}
static int workdir_iterator__at_end(git_iterator *self)
{
return (((workdir_iterator *)self)->entry.path == NULL);
}
static int workdir_iterator__advance(
git_iterator *self, const git_index_entry **entry)
{
int error;
workdir_iterator *wi = (workdir_iterator *)self;
workdir_iterator_frame *wf;
git_path_with_stat *next;
if (entry != NULL)
*entry = NULL;
if (wi->entry.path == NULL)
return 0;
while ((wf = wi->stack) != NULL) {
next = git_vector_get(&wf->entries, ++wf->index);
if (next != NULL) {
if (strcmp(next->path, DOT_GIT "/") == 0)
continue;
/* else found a good entry */
break;
}
/* pop workdir directory stack */
wi->stack = wf->next;
workdir_iterator__free_frame(wf);
git_ignore__pop_dir(&wi->ignores);
if (wi->stack == NULL) {
memset(&wi->entry, 0, sizeof(wi->entry));
return 0;
}
}
error = workdir_iterator__update_entry(wi);
if (!error && entry != NULL)
error = workdir_iterator__current(self, entry);
return error;
}
static int workdir_iterator__seek(git_iterator *self, const char *prefix)
{
GIT_UNUSED(self);
GIT_UNUSED(prefix);
/* pop stack until matching prefix */
/* find prefix item in current frame */
/* push subdirectories as deep as possible while matching */
return 0;
}
static int workdir_iterator__reset(git_iterator *self)
{
workdir_iterator *wi = (workdir_iterator *)self;
while (wi->stack != NULL && wi->stack->next != NULL) {
workdir_iterator_frame *wf = wi->stack;
wi->stack = wf->next;
workdir_iterator__free_frame(wf);
git_ignore__pop_dir(&wi->ignores);
}
if (wi->stack)
wi->stack->index = 0;
return 0;
}
static void workdir_iterator__free(git_iterator *self)
{
workdir_iterator *wi = (workdir_iterator *)self;
while (wi->stack != NULL) {
workdir_iterator_frame *wf = wi->stack;
wi->stack = wf->next;
workdir_iterator__free_frame(wf);
}
git_ignore__free(&wi->ignores);
git_buf_free(&wi->path);
}
static int workdir_iterator__update_entry(workdir_iterator *wi)
{
git_path_with_stat *ps = git_vector_get(&wi->stack->entries, wi->stack->index);
git_buf_truncate(&wi->path, wi->root_len);
memset(&wi->entry, 0, sizeof(wi->entry));
if (!ps)
return 0;
if (git_buf_put(&wi->path, ps->path, ps->path_len) < 0)
return -1;
if (wi->base.end &&
git__prefixcmp(wi->path.ptr + wi->root_len, wi->base.end) > 0)
return 0;
wi->entry.path = ps->path;
/* skip over .git directory */
if (strcmp(ps->path, DOT_GIT "/") == 0)
return workdir_iterator__advance((git_iterator *)wi, NULL);
/* if there is an error processing the entry, treat as ignored */
wi->is_ignored = 1;
git_index__init_entry_from_stat(&ps->st, &wi->entry);
/* need different mode here to keep directories during iteration */
wi->entry.mode = git_futils_canonical_mode(ps->st.st_mode);
/* if this is a file type we don't handle, treat as ignored */
if (wi->entry.mode == 0)
return 0;
/* okay, we are far enough along to look up real ignore rule */
if (git_ignore__lookup(&wi->ignores, wi->entry.path, &wi->is_ignored) < 0)
return 0; /* if error, ignore it and ignore file */
/* detect submodules */
if (S_ISDIR(wi->entry.mode)) {
bool is_submodule = git_path_contains(&wi->path, DOT_GIT);
/* if there is no .git, still check submodules data */
if (!is_submodule) {
int res = git_submodule_lookup(NULL, wi->repo, wi->entry.path);
is_submodule = (res == 0);
if (res == GIT_ENOTFOUND)
giterr_clear();
}
/* if submodule, mark as GITLINK and remove trailing slash */
if (is_submodule) {
size_t len = strlen(wi->entry.path);
assert(wi->entry.path[len - 1] == '/');
wi->entry.path[len - 1] = '\0';
wi->entry.mode = S_IFGITLINK;
}
}
return 0;
}
int git_iterator_for_workdir_range(
git_iterator **iter,
git_repository *repo,
const char *start,
const char *end)
{
int error;
workdir_iterator *wi;
if (git_repository_is_bare(repo)) {
giterr_set(GITERR_INVALID,
"Cannot scan working directory for bare repo");
return -1;
}
ITERATOR_BASE_INIT(wi, workdir, WORKDIR);
wi->repo = repo;
if (git_buf_sets(&wi->path, git_repository_workdir(repo)) < 0 ||
git_path_to_dir(&wi->path) < 0 ||
git_ignore__for_path(repo, "", &wi->ignores) < 0)
{
git__free(wi);
return -1;
}
wi->root_len = wi->path.size;
if ((error = workdir_iterator__expand_dir(wi)) < 0)
git_iterator_free((git_iterator *)wi);
else
*iter = (git_iterator *)wi;
return error;
}
int git_iterator_current_tree_entry(
git_iterator *iter, const git_tree_entry **tree_entry)
{
*tree_entry = (iter->type != GIT_ITERATOR_TREE) ? NULL :
tree_iterator__tree_entry((tree_iterator *)iter);
return 0;
}
int git_iterator_current_is_ignored(git_iterator *iter)
{
return (iter->type != GIT_ITERATOR_WORKDIR) ? 0 :
((workdir_iterator *)iter)->is_ignored;
}
int git_iterator_advance_into_directory(
git_iterator *iter, const git_index_entry **entry)
{
workdir_iterator *wi = (workdir_iterator *)iter;
if (iter->type == GIT_ITERATOR_WORKDIR &&
wi->entry.path &&
S_ISDIR(wi->entry.mode) &&
!S_ISGITLINK(wi->entry.mode))
{
if (workdir_iterator__expand_dir(wi) < 0)
/* if error loading or if empty, skip the directory. */
return workdir_iterator__advance(iter, entry);
}
return entry ? git_iterator_current(iter, entry) : 0;
}
int git_iterator_cmp(
git_iterator *iter, const char *path_prefix)
{
const git_index_entry *entry;
/* a "done" iterator is after every prefix */
if (git_iterator_current(iter, &entry) < 0 ||
entry == NULL)
return 1;
/* a NULL prefix is after any valid iterator */
if (!path_prefix)
return -1;
return git__prefixcmp(entry->path, path_prefix);
}
