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Copy pathiterator.c
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513 lines (420 loc) · 12.5 KB
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/*
* 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"
typedef struct tree_iterator_frame tree_iterator_frame;
struct tree_iterator_frame {
tree_iterator_frame *next;
git_tree *tree;
unsigned int index;
};
typedef struct {
git_iterator base;
git_repository *repo;
tree_iterator_frame *stack;
git_index_entry entry;
git_buf path;
} 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 int tree_iterator__current(
git_iterator *self, const git_index_entry **entry)
{
int error;
tree_iterator *ti = (tree_iterator *)self;
const git_tree_entry *te = tree_iterator__tree_entry(ti);
*entry = NULL;
if (te == NULL)
return GIT_SUCCESS;
ti->entry.mode = te->attr;
git_oid_cpy(&ti->entry.oid, &te->oid);
error = git_buf_joinpath(&ti->path, ti->path.ptr, te->filename);
if (error < GIT_SUCCESS)
return error;
ti->entry.path = ti->path.ptr;
*entry = &ti->entry;
return GIT_SUCCESS;
}
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)
{
tree_iterator_frame *tf = git__calloc(1, sizeof(tree_iterator_frame));
tf->tree = tree;
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;
while (te != NULL && entry_is_tree(te)) {
error = git_tree_lookup(&subtree, ti->repo, &te->oid);
if (error != GIT_SUCCESS)
return error;
if ((tf = tree_iterator__alloc_frame(subtree)) == NULL)
return GIT_ENOMEM;
tf->next = ti->stack;
ti->stack = tf;
error = git_buf_joinpath(&ti->path, ti->path.ptr, te->filename);
if (error < GIT_SUCCESS)
return error;
te = tree_iterator__tree_entry(ti);
}
return GIT_SUCCESS;
}
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__advance(
git_iterator *self, const git_index_entry **entry)
{
int error = GIT_SUCCESS;
tree_iterator *ti = (tree_iterator *)self;
const git_tree_entry *te = NULL;
if (entry != NULL)
*entry = NULL;
while (ti->stack != NULL) {
/* remove old entry filename */
git_buf_rtruncate_at_char(&ti->path, '/');
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 && entry_is_tree(te))
error = tree_iterator__expand_tree(ti);
if (error == GIT_SUCCESS && entry != NULL)
error = tree_iterator__current(self, entry);
return error;
}
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 = 0;
return tree_iterator__expand_tree(ti);
}
int git_iterator_for_tree(
git_repository *repo, git_tree *tree, git_iterator **iter)
{
int error;
tree_iterator *ti = git__calloc(1, sizeof(tree_iterator));
if (!ti)
return GIT_ENOMEM;
ti->base.type = GIT_ITERATOR_TREE;
ti->base.current = tree_iterator__current;
ti->base.at_end = tree_iterator__at_end;
ti->base.advance = tree_iterator__advance;
ti->base.reset = tree_iterator__reset;
ti->base.free = tree_iterator__free;
ti->repo = repo;
ti->stack = tree_iterator__alloc_frame(tree);
if ((error = tree_iterator__expand_tree(ti)) < GIT_SUCCESS)
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;
*entry = git_index_get(ii->index, ii->current);
return GIT_SUCCESS;
}
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++;
if (entry)
*entry = git_index_get(ii->index, ii->current);
return GIT_SUCCESS;
}
static int index_iterator__reset(git_iterator *self)
{
index_iterator *ii = (index_iterator *)self;
ii->current = 0;
return GIT_SUCCESS;
}
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(git_repository *repo, git_iterator **iter)
{
int error;
index_iterator *ii = git__calloc(1, sizeof(index_iterator));
if (!ii)
return GIT_ENOMEM;
ii->base.type = GIT_ITERATOR_INDEX;
ii->base.current = index_iterator__current;
ii->base.at_end = index_iterator__at_end;
ii->base.advance = index_iterator__advance;
ii->base.reset = index_iterator__reset;
ii->base.free = index_iterator__free;
ii->current = 0;
if ((error = git_repository_index(&ii->index, repo)) < GIT_SUCCESS)
git__free(ii);
else
*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;
};
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 wf;
if (git_vector_init(&wf->entries, 0, git_path_with_stat_cmp) != GIT_SUCCESS) {
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__expand_dir(workdir_iterator *wi)
{
int error;
workdir_iterator_frame *wf = workdir_iterator__alloc_frame();
if (wf == NULL)
return GIT_ENOMEM;
error = git_path_dirload_with_stat(wi->path.ptr, wi->root_len, &wf->entries);
if (error < GIT_SUCCESS || wf->entries.length == 0) {
workdir_iterator__free_frame(wf);
return GIT_ENOTFOUND;
}
git_vector_sort(&wf->entries);
wf->next = wi->stack;
wi->stack = wf;
/* only push new ignores if this is not top level directory */
if (wi->stack->next != NULL) {
int 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 GIT_SUCCESS;
}
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 GIT_SUCCESS;
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 GIT_SUCCESS;
}
}
error = workdir_iterator__update_entry(wi);
if (error == GIT_SUCCESS && entry != NULL)
error = workdir_iterator__current(self, entry);
return error;
}
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 GIT_SUCCESS;
}
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)
{
int error;
git_path_with_stat *ps = git_vector_get(&wi->stack->entries, wi->stack->index);
git_buf_truncate(&wi->path, wi->root_len);
error = git_buf_put(&wi->path, ps->path, ps->path_len);
if (error < GIT_SUCCESS)
return error;
memset(&wi->entry, 0, sizeof(wi->entry));
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;
/* TODO: remove shared code for struct stat conversion with index.c */
wi->entry.ctime.seconds = (git_time_t)ps->st.st_ctime;
wi->entry.mtime.seconds = (git_time_t)ps->st.st_mtime;
wi->entry.dev = ps->st.st_rdev;
wi->entry.ino = ps->st.st_ino;
wi->entry.mode = git_futils_canonical_mode(ps->st.st_mode);
wi->entry.uid = ps->st.st_uid;
wi->entry.gid = ps->st.st_gid;
wi->entry.file_size = ps->st.st_size;
/* if this is a file type we don't handle, treat as ignored */
if (wi->entry.mode == 0)
return GIT_SUCCESS;
/* okay, we are far enough along to look up real ignore rule */
error = git_ignore__lookup(&wi->ignores, wi->entry.path, &wi->is_ignored);
if (error != GIT_SUCCESS)
return GIT_SUCCESS;
/* detect submodules */
if (S_ISDIR(wi->entry.mode) &&
git_path_contains(&wi->path, DOT_GIT) == GIT_SUCCESS)
wi->entry.mode = S_IFGITLINK;
return GIT_SUCCESS;
}
int git_iterator_for_workdir(git_repository *repo, git_iterator **iter)
{
int error;
workdir_iterator *wi = git__calloc(1, sizeof(workdir_iterator));
if (!wi)
return GIT_ENOMEM;
wi->base.type = GIT_ITERATOR_WORKDIR;
wi->base.current = workdir_iterator__current;
wi->base.at_end = workdir_iterator__at_end;
wi->base.advance = workdir_iterator__advance;
wi->base.reset = workdir_iterator__reset;
wi->base.free = workdir_iterator__free;
wi->repo = repo;
error = git_buf_sets(&wi->path, git_repository_workdir(repo));
if (error == GIT_SUCCESS)
error = git_path_to_dir(&wi->path);
if (error == GIT_SUCCESS)
error = git_ignore__for_path(repo, "", &wi->ignores);
if (error != GIT_SUCCESS) {
git__free(wi);
return error;
}
wi->root_len = wi->path.size;
if ((error = workdir_iterator__expand_dir(wi)) < GIT_SUCCESS)
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 GIT_SUCCESS;
}
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))
{
if (workdir_iterator__expand_dir(wi) < GIT_SUCCESS)
/* if error loading or if empty, skip the directory. */
return workdir_iterator__advance(iter, entry);
}
return entry ? git_iterator_current(iter, entry) : GIT_SUCCESS;
}
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