#include "git2/ignore.h"

#include "ignore.h"

#include "path.h"

#include "config.h"

#define GIT_IGNORE_INTERNAL "[internal]exclude"

#define GIT_IGNORE_FILE_INREPO "info/exclude"

#define GIT_IGNORE_FILE ".gitignore"

#define GIT_IGNORE_DEFAULT_RULES ".\n..\n.git\n"

static int parse_ignore_file(

git_repository *repo, void *parsedata, const char *buffer, git_attr_file *ignores)

{

int error = 0;

git_attr_fnmatch *match = NULL;

const char *scan = NULL;

char *context = NULL;

bool ignore_case = false;

git_config *cfg = NULL;

int val;

/* Prefer to have the caller pass in a git_ignores as the parsedata object.

if (parsedata != NULL) {

ignore_case = ((git_ignores *)parsedata)->ignore_case;

} else {

if ((error = git_repository_config(&cfg, repo)) < 0)

return error;

if (git_config_get_bool(&val, cfg, "core.ignorecase") == 0)

ignore_case = (val != 0);

git_config_free(cfg);

}

if (ignores->key && git__suffixcmp(ignores->key, "/" GIT_IGNORE_FILE) == 0) {

context = ignores->key + 2;

context[strlen(context) - strlen(GIT_IGNORE_FILE)] = '\0';

}

scan = buffer;

while (!error && *scan) {

if (!match) {

match = git__calloc(1, sizeof(*match));

GITERR_CHECK_ALLOC(match);

}

match->flags = GIT_ATTR_FNMATCH_ALLOWSPACE;

if (!(error = git_attr_fnmatch__parse(

match, ignores->pool, context, &scan)))

{

match->flags |= GIT_ATTR_FNMATCH_IGNORE;

if (ignore_case)

match->flags |= GIT_ATTR_FNMATCH_ICASE;

scan = git__next_line(scan);

error = git_vector_insert(&ignores->rules, match);

}

if (error != 0) {

git__free(match->pattern);

match->pattern = NULL;

if (error == GIT_ENOTFOUND)

error = 0;

} else {

match = NULL; /* vector now "owns" the match */

}

}

git__free(match);

/* restore file path used for context */

if (context)

context[strlen(context)] = '.'; /* first char of GIT_IGNORE_FILE */

return error;

}

#define push_ignore_file(R,IGN,S,B,F) \

git_attr_cache__push_file((R),(B),(F),GIT_ATTR_FILE_FROM_FILE,parse_ignore_file,(IGN),(S))

static int push_one_ignore(void *ref, git_buf *path)

{

git_ignores *ign = (git_ignores *)ref;

return push_ignore_file(ign->repo, ign, &ign->ign_path, path->ptr, GIT_IGNORE_FILE);

}

static int get_internal_ignores(git_attr_file **ign, git_repository *repo)

{

int error;

if (!(error = git_attr_cache__init(repo)))

error = git_attr_cache__internal_file(repo, GIT_IGNORE_INTERNAL, ign);

if (!error && !(*ign)->rules.length)

error = parse_ignore_file(repo, NULL, GIT_IGNORE_DEFAULT_RULES, *ign);

return error;

}

int git_ignore__for_path(

git_repository *repo,

const char *path,

git_ignores *ignores)

{

int error = 0;

const char *workdir = git_repository_workdir(repo);

git_config *cfg = NULL;

int val;

assert(ignores);

ignores->repo = repo;

git_buf_init(&ignores->dir, 0);

ignores->ign_internal = NULL;

/* Set the ignore_case flag appropriately */

if ((error = git_repository_config(&cfg, repo)) < 0)

goto cleanup;

if (git_config_get_bool(&val, cfg, "core.ignorecase") == 0)

ignores->ignore_case = (val != 0);

else

ignores->ignore_case = 0;

git_config_free(cfg);

if ((error = git_vector_init(&ignores->ign_path, 8, NULL)) < 0 ||

(error = git_vector_init(&ignores->ign_global, 2, NULL)) < 0 ||

(error = git_attr_cache__init(repo)) < 0)

goto cleanup;

/* given a unrooted path in a non-bare repo, resolve it */

if (workdir && git_path_root(path) < 0)

error = git_path_find_dir(&ignores->dir, path, workdir);

else

error = git_buf_sets(&ignores->dir, path);

if (error < 0)

goto cleanup;

/* set up internals */

error = get_internal_ignores(&ignores->ign_internal, repo);

if (error < 0)

goto cleanup;

/* load .gitignore up the path */

if (workdir != NULL) {

error = git_path_walk_up(

&ignores->dir, workdir, push_one_ignore, ignores);

if (error < 0)

goto cleanup;

}

/* load .git/info/exclude */

error = push_ignore_file(repo, ignores, &ignores->ign_global,

git_repository_path(repo), GIT_IGNORE_FILE_INREPO);

if (error < 0)

goto cleanup;

/* load core.excludesfile */

if (git_repository_attr_cache(repo)->cfg_excl_file != NULL)

error = push_ignore_file(repo, ignores, &ignores->ign_global, NULL,

git_repository_attr_cache(repo)->cfg_excl_file);

cleanup:

if (error < 0)

git_ignore__free(ignores);

return error;

}

int git_ignore__push_dir(git_ignores *ign, const char *dir)

{

if (git_buf_joinpath(&ign->dir, ign->dir.ptr, dir) < 0)

return -1;

else

return push_ignore_file(

ign->repo, ign, &ign->ign_path, ign->dir.ptr, GIT_IGNORE_FILE);

}

int git_ignore__pop_dir(git_ignores *ign)

{

if (ign->ign_path.length > 0) {

git_attr_file *file = git_vector_last(&ign->ign_path);

if (git__suffixcmp(ign->dir.ptr, file->key + 2) == 0)

git_vector_pop(&ign->ign_path);

git_buf_rtruncate_at_char(&ign->dir, '/');

}

return 0;

}

void git_ignore__free(git_ignores *ignores)

{

/* don't need to free ignores->ign_internal since it is in cache */

git_vector_free(&ignores->ign_path);

git_vector_free(&ignores->ign_global);

git_buf_free(&ignores->dir);

}

static bool ignore_lookup_in_rules(

git_vector *rules, git_attr_path *path, int *ignored)

{

size_t j;

git_attr_fnmatch *match;

git_vector_rforeach(rules, j, match) {

if (git_attr_fnmatch__match(match, path)) {

*ignored = ((match->flags & GIT_ATTR_FNMATCH_NEGATIVE) == 0);

return true;

}

}

return false;

}

int git_ignore__lookup(

git_ignores *ignores, const char *pathname, int *ignored)

{

unsigned int i;

git_attr_file *file;

git_attr_path path;

if (git_attr_path__init(

&path, pathname, git_repository_workdir(ignores->repo)) < 0)

return -1;

/* first process builtins - success means path was found */

if (ignore_lookup_in_rules(

&ignores->ign_internal->rules, &path, ignored))

goto cleanup;

/* next process files in the path */

git_vector_foreach(&ignores->ign_path, i, file) {

if (ignore_lookup_in_rules(&file->rules, &path, ignored))

goto cleanup;

}

/* last process global ignores */

git_vector_foreach(&ignores->ign_global, i, file) {

if (ignore_lookup_in_rules(&file->rules, &path, ignored))

goto cleanup;

}

*ignored = 0;

cleanup:

git_attr_path__free(&path);

return 0;

}

int git_ignore_add_rule(

git_repository *repo,

const char *rules)

{

int error;

git_attr_file *ign_internal;

if (!(error = get_internal_ignores(&ign_internal, repo)))

error = parse_ignore_file(repo, NULL, rules, ign_internal);

return error;

}

int git_ignore_clear_internal_rules(

git_repository *repo)

{

int error;

git_attr_file *ign_internal;

if (!(error = get_internal_ignores(&ign_internal, repo))) {

git_attr_file__clear_rules(ign_internal);

return parse_ignore_file(

repo, NULL, GIT_IGNORE_DEFAULT_RULES, ign_internal);

}

return error;

}

int git_ignore_path_is_ignored(

int *ignored,

git_repository *repo,

const char *pathname)

{

int error;

const char *workdir;

git_attr_path path;

char *tail, *end;

bool full_is_dir;

git_ignores ignores;

unsigned int i;

git_attr_file *file;

assert(ignored && pathname);

workdir = repo ? git_repository_workdir(repo) : NULL;

if ((error = git_attr_path__init(&path, pathname, workdir)) < 0)

return error;

tail = path.path;

end = &path.full.ptr[path.full.size];

full_is_dir = path.is_dir;

while (1) {

/* advance to next component of path */

path.basename = tail;

while (tail < end && *tail != '/') tail++;

*tail = '\0';

path.full.size = (tail - path.full.ptr);

path.is_dir = (tail == end) ? full_is_dir : true;

/* update ignores for new path fragment */

if (path.basename == path.path)

error = git_ignore__for_path(repo, path.path, &ignores);

else

error = git_ignore__push_dir(&ignores, path.basename);

if (error < 0)

break;

/* first process builtins - success means path was found */

if (ignore_lookup_in_rules(

&ignores.ign_internal->rules, &path, ignored))

goto cleanup;

/* next process files in the path */

git_vector_foreach(&ignores.ign_path, i, file) {

if (ignore_lookup_in_rules(&file->rules, &path, ignored))

goto cleanup;

}

/* last process global ignores */

git_vector_foreach(&ignores.ign_global, i, file) {

if (ignore_lookup_in_rules(&file->rules, &path, ignored))

goto cleanup;

}

/* if we found no rules before reaching the end, we're done */

if (tail == end)

break;

/* reinstate divider in path */

*tail = '/';

while (*tail == '/') tail++;

}

*ignored = 0;

cleanup:

git_attr_path__free(&path);

git_ignore__free(&ignores);

return error;

}