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Copy pathattr.c
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544 lines (431 loc) · 12 KB
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#include "common.h"
#include "repository.h"
#include "sysdir.h"
#include "config.h"
#include "attr_file.h"
#include "ignore.h"
#include "git2/oid.h"
#include <ctype.h>
GIT__USE_STRMAP
const char *git_attr__true = "[internal]__TRUE__";
const char *git_attr__false = "[internal]__FALSE__";
const char *git_attr__unset = "[internal]__UNSET__";
git_attr_t git_attr_value(const char *attr)
{
if (attr == NULL || attr == git_attr__unset)
return GIT_ATTR_UNSPECIFIED_T;
if (attr == git_attr__true)
return GIT_ATTR_TRUE_T;
if (attr == git_attr__false)
return GIT_ATTR_FALSE_T;
return GIT_ATTR_VALUE_T;
}
static int collect_attr_files(
git_repository *repo,
git_attr_session *attr_session,
uint32_t flags,
const char *path,
git_vector *files);
static void release_attr_files(git_vector *files);
int git_attr_get(
const char **value,
git_repository *repo,
uint32_t flags,
const char *pathname,
const char *name)
{
int error;
git_attr_path path;
git_vector files = GIT_VECTOR_INIT;
size_t i, j;
git_attr_file *file;
git_attr_name attr;
git_attr_rule *rule;
assert(value && repo && name);
*value = NULL;
if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), GIT_DIR_FLAG_UNKNOWN) < 0)
return -1;
if ((error = collect_attr_files(repo, NULL, flags, pathname, &files)) < 0)
goto cleanup;
memset(&attr, 0, sizeof(attr));
attr.name = name;
attr.name_hash = git_attr_file__name_hash(name);
git_vector_foreach(&files, i, file) {
git_attr_file__foreach_matching_rule(file, &path, j, rule) {
size_t pos;
if (!git_vector_bsearch(&pos, &rule->assigns, &attr)) {
*value = ((git_attr_assignment *)git_vector_get(
&rule->assigns, pos))->value;
goto cleanup;
}
}
}
cleanup:
release_attr_files(&files);
git_attr_path__free(&path);
return error;
}
typedef struct {
git_attr_name name;
git_attr_assignment *found;
} attr_get_many_info;
int git_attr_get_many_with_session(
const char **values,
git_repository *repo,
git_attr_session *attr_session,
uint32_t flags,
const char *pathname,
size_t num_attr,
const char **names)
{
int error;
git_attr_path path;
git_vector files = GIT_VECTOR_INIT;
size_t i, j, k;
git_attr_file *file;
git_attr_rule *rule;
attr_get_many_info *info = NULL;
size_t num_found = 0;
if (!num_attr)
return 0;
assert(values && repo && names);
if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), GIT_DIR_FLAG_UNKNOWN) < 0)
return -1;
if ((error = collect_attr_files(repo, attr_session, flags, pathname, &files)) < 0)
goto cleanup;
info = git__calloc(num_attr, sizeof(attr_get_many_info));
GITERR_CHECK_ALLOC(info);
git_vector_foreach(&files, i, file) {
git_attr_file__foreach_matching_rule(file, &path, j, rule) {
for (k = 0; k < num_attr; k++) {
size_t pos;
if (info[k].found != NULL) /* already found assignment */
continue;
if (!info[k].name.name) {
info[k].name.name = names[k];
info[k].name.name_hash = git_attr_file__name_hash(names[k]);
}
if (!git_vector_bsearch(&pos, &rule->assigns, &info[k].name)) {
info[k].found = (git_attr_assignment *)
git_vector_get(&rule->assigns, pos);
values[k] = info[k].found->value;
if (++num_found == num_attr)
goto cleanup;
}
}
}
}
for (k = 0; k < num_attr; k++) {
if (!info[k].found)
values[k] = NULL;
}
cleanup:
release_attr_files(&files);
git_attr_path__free(&path);
git__free(info);
return error;
}
int git_attr_get_many(
const char **values,
git_repository *repo,
uint32_t flags,
const char *pathname,
size_t num_attr,
const char **names)
{
return git_attr_get_many_with_session(
values, repo, NULL, flags, pathname, num_attr, names);
}
int git_attr_foreach(
git_repository *repo,
uint32_t flags,
const char *pathname,
int (*callback)(const char *name, const char *value, void *payload),
void *payload)
{
int error;
git_attr_path path;
git_vector files = GIT_VECTOR_INIT;
size_t i, j, k;
git_attr_file *file;
git_attr_rule *rule;
git_attr_assignment *assign;
git_strmap *seen = NULL;
assert(repo && callback);
if (git_attr_path__init(&path, pathname, git_repository_workdir(repo), GIT_DIR_FLAG_UNKNOWN) < 0)
return -1;
if ((error = collect_attr_files(repo, NULL, flags, pathname, &files)) < 0 ||
(error = git_strmap_alloc(&seen)) < 0)
goto cleanup;
git_vector_foreach(&files, i, file) {
git_attr_file__foreach_matching_rule(file, &path, j, rule) {
git_vector_foreach(&rule->assigns, k, assign) {
/* skip if higher priority assignment was already seen */
if (git_strmap_exists(seen, assign->name))
continue;
git_strmap_insert(seen, assign->name, assign, error);
if (error < 0)
goto cleanup;
error = callback(assign->name, assign->value, payload);
if (error) {
giterr_set_after_callback(error);
goto cleanup;
}
}
}
}
cleanup:
git_strmap_free(seen);
release_attr_files(&files);
git_attr_path__free(&path);
return error;
}
static int preload_attr_file(
git_repository *repo,
git_attr_session *attr_session,
git_attr_file_source source,
const char *base,
const char *file)
{
int error;
git_attr_file *preload = NULL;
if (!file)
return 0;
if (!(error = git_attr_cache__get(
&preload, repo, attr_session, source, base, file, git_attr_file__parse_buffer)))
git_attr_file__free(preload);
return error;
}
static int system_attr_file(
git_buf *out,
git_attr_session *attr_session)
{
int error;
if (!attr_session) {
error = git_sysdir_find_system_file(out, GIT_ATTR_FILE_SYSTEM);
if (error == GIT_ENOTFOUND)
giterr_clear();
return error;
}
if (!attr_session->init_sysdir) {
error = git_sysdir_find_system_file(&attr_session->sysdir, GIT_ATTR_FILE_SYSTEM);
if (error == GIT_ENOTFOUND)
giterr_clear();
else if (error)
return error;
attr_session->init_sysdir = 1;
}
if (attr_session->sysdir.size == 0)
return GIT_ENOTFOUND;
/* We can safely provide a git_buf with no allocation (asize == 0) to
* a consumer. This allows them to treat this as a regular `git_buf`,
* but their call to `git_buf_free` will not attempt to free it.
*/
git_buf_attach_notowned(
out, attr_session->sysdir.ptr, attr_session->sysdir.size);
return 0;
}
static int attr_setup(git_repository *repo, git_attr_session *attr_session)
{
int error = 0;
const char *workdir = git_repository_workdir(repo);
git_index *idx = NULL;
git_buf sys = GIT_BUF_INIT;
if (attr_session && attr_session->init_setup)
return 0;
if ((error = git_attr_cache__init(repo)) < 0)
return error;
/* preload attribute files that could contain macros so the
* definitions will be available for later file parsing
*/
error = system_attr_file(&sys, attr_session);
if (error == 0)
error = preload_attr_file(
repo, attr_session, GIT_ATTR_FILE__FROM_FILE, NULL, sys.ptr);
if (error != GIT_ENOTFOUND)
return error;
git_buf_free(&sys);
if ((error = preload_attr_file(
repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
NULL, git_repository_attr_cache(repo)->cfg_attr_file)) < 0)
return error;
if ((error = preload_attr_file(
repo, attr_session, GIT_ATTR_FILE__FROM_FILE,
git_repository_path(repo), GIT_ATTR_FILE_INREPO)) < 0)
return error;
if (workdir != NULL &&
(error = preload_attr_file(
repo, attr_session, GIT_ATTR_FILE__FROM_FILE, workdir, GIT_ATTR_FILE)) < 0)
return error;
if ((error = git_repository_index__weakptr(&idx, repo)) < 0 ||
(error = preload_attr_file(
repo, attr_session, GIT_ATTR_FILE__FROM_INDEX, NULL, GIT_ATTR_FILE)) < 0)
return error;
if (attr_session)
attr_session->init_setup = 1;
return error;
}
int git_attr_add_macro(
git_repository *repo,
const char *name,
const char *values)
{
int error;
git_attr_rule *macro = NULL;
git_pool *pool;
if ((error = git_attr_cache__init(repo)) < 0)
return error;
macro = git__calloc(1, sizeof(git_attr_rule));
GITERR_CHECK_ALLOC(macro);
pool = &git_repository_attr_cache(repo)->pool;
macro->match.pattern = git_pool_strdup(pool, name);
GITERR_CHECK_ALLOC(macro->match.pattern);
macro->match.length = strlen(macro->match.pattern);
macro->match.flags = GIT_ATTR_FNMATCH_MACRO;
error = git_attr_assignment__parse(repo, pool, ¯o->assigns, &values);
if (!error)
error = git_attr_cache__insert_macro(repo, macro);
if (error < 0)
git_attr_rule__free(macro);
return error;
}
typedef struct {
git_repository *repo;
git_attr_session *attr_session;
uint32_t flags;
const char *workdir;
git_index *index;
git_vector *files;
} attr_walk_up_info;
static int attr_decide_sources(
uint32_t flags, bool has_wd, bool has_index, git_attr_file_source *srcs)
{
int count = 0;
switch (flags & 0x03) {
case GIT_ATTR_CHECK_FILE_THEN_INDEX:
if (has_wd)
srcs[count++] = GIT_ATTR_FILE__FROM_FILE;
if (has_index)
srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
break;
case GIT_ATTR_CHECK_INDEX_THEN_FILE:
if (has_index)
srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
if (has_wd)
srcs[count++] = GIT_ATTR_FILE__FROM_FILE;
break;
case GIT_ATTR_CHECK_INDEX_ONLY:
if (has_index)
srcs[count++] = GIT_ATTR_FILE__FROM_INDEX;
break;
}
return count;
}
static int push_attr_file(
git_repository *repo,
git_attr_session *attr_session,
git_vector *list,
git_attr_file_source source,
const char *base,
const char *filename)
{
int error = 0;
git_attr_file *file = NULL;
error = git_attr_cache__get(&file, repo, attr_session,
source, base, filename, git_attr_file__parse_buffer);
if (error < 0)
return error;
if (file != NULL) {
if ((error = git_vector_insert(list, file)) < 0)
git_attr_file__free(file);
}
return error;
}
static int push_one_attr(void *ref, const char *path)
{
int error = 0, n_src, i;
attr_walk_up_info *info = (attr_walk_up_info *)ref;
git_attr_file_source src[2];
n_src = attr_decide_sources(
info->flags, info->workdir != NULL, info->index != NULL, src);
for (i = 0; !error && i < n_src; ++i)
error = push_attr_file(info->repo, info->attr_session,
info->files, src[i], path, GIT_ATTR_FILE);
return error;
}
static void release_attr_files(git_vector *files)
{
size_t i;
git_attr_file *file;
git_vector_foreach(files, i, file) {
git_attr_file__free(file);
files->contents[i] = NULL;
}
git_vector_free(files);
}
static int collect_attr_files(
git_repository *repo,
git_attr_session *attr_session,
uint32_t flags,
const char *path,
git_vector *files)
{
int error = 0;
git_buf dir = GIT_BUF_INIT;
const char *workdir = git_repository_workdir(repo);
attr_walk_up_info info = { NULL };
if ((error = attr_setup(repo, attr_session)) < 0)
return error;
/* Resolve path in a non-bare repo */
if (workdir != NULL)
error = git_path_find_dir(&dir, path, workdir);
else
error = git_path_dirname_r(&dir, path);
if (error < 0)
goto cleanup;
/* in precendence order highest to lowest:
* - $GIT_DIR/info/attributes
* - path components with .gitattributes
* - config core.attributesfile
* - $GIT_PREFIX/etc/gitattributes
*/
error = push_attr_file(
repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
git_repository_path(repo), GIT_ATTR_FILE_INREPO);
if (error < 0)
goto cleanup;
info.repo = repo;
info.attr_session = attr_session;
info.flags = flags;
info.workdir = workdir;
if (git_repository_index__weakptr(&info.index, repo) < 0)
giterr_clear(); /* no error even if there is no index */
info.files = files;
if (!strcmp(dir.ptr, "."))
error = push_one_attr(&info, "");
else
error = git_path_walk_up(&dir, workdir, push_one_attr, &info);
if (error < 0)
goto cleanup;
if (git_repository_attr_cache(repo)->cfg_attr_file != NULL) {
error = push_attr_file(
repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
NULL, git_repository_attr_cache(repo)->cfg_attr_file);
if (error < 0)
goto cleanup;
}
if ((flags & GIT_ATTR_CHECK_NO_SYSTEM) == 0) {
error = system_attr_file(&dir, attr_session);
if (!error)
error = push_attr_file(
repo, attr_session, files, GIT_ATTR_FILE__FROM_FILE,
NULL, dir.ptr);
else if (error == GIT_ENOTFOUND)
error = 0;
}
cleanup:
if (error < 0)
release_attr_files(files);
git_buf_free(&dir);
return error;
}
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