| /* |
| * 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 "config.h" |
| |
| #include "git2/config.h" |
| #include "git2/sys/config.h" |
| |
| #include "array.h" |
| #include "buffer.h" |
| #include "config_backend.h" |
| #include "config_entries.h" |
| #include "config_parse.h" |
| #include "filebuf.h" |
| #include "regexp.h" |
| #include "sysdir.h" |
| #include "wildmatch.h" |
| |
| /* Max depth for [include] directives */ |
| #define MAX_INCLUDE_DEPTH 10 |
| |
| typedef struct config_file { |
| git_futils_filestamp stamp; |
| git_oid checksum; |
| char *path; |
| git_array_t(struct config_file) includes; |
| } config_file; |
| |
| typedef struct { |
| git_config_backend parent; |
| git_mutex values_mutex; |
| git_config_entries *entries; |
| const git_repository *repo; |
| git_config_level_t level; |
| |
| git_array_t(git_config_parser) readers; |
| |
| bool locked; |
| git_filebuf locked_buf; |
| git_buf locked_content; |
| |
| config_file file; |
| } config_file_backend; |
| |
| typedef struct { |
| const git_repository *repo; |
| config_file *file; |
| git_config_entries *entries; |
| git_config_level_t level; |
| unsigned int depth; |
| } config_file_parse_data; |
| |
| static int config_file_read(git_config_entries *entries, const git_repository *repo, config_file *file, git_config_level_t level, int depth); |
| static int config_file_read_buffer(git_config_entries *entries, const git_repository *repo, config_file *file, git_config_level_t level, int depth, const char *buf, size_t buflen); |
| static int config_file_write(config_file_backend *cfg, const char *orig_key, const char *key, const git_regexp *preg, const char *value); |
| static char *escape_value(const char *ptr); |
| |
| /** |
| * Take the current values map from the backend and increase its |
| * refcount. This is its own function to make sure we use the mutex to |
| * avoid the map pointer from changing under us. |
| */ |
| static int config_file_entries_take(git_config_entries **out, config_file_backend *b) |
| { |
| int error; |
| |
| if ((error = git_mutex_lock(&b->values_mutex)) < 0) { |
| git_error_set(GIT_ERROR_OS, "failed to lock config backend"); |
| return error; |
| } |
| |
| git_config_entries_incref(b->entries); |
| *out = b->entries; |
| |
| git_mutex_unlock(&b->values_mutex); |
| |
| return 0; |
| } |
| |
| static void config_file_clear(config_file *file) |
| { |
| config_file *include; |
| uint32_t i; |
| |
| if (file == NULL) |
| return; |
| |
| git_array_foreach(file->includes, i, include) { |
| config_file_clear(include); |
| } |
| git_array_clear(file->includes); |
| |
| git__free(file->path); |
| } |
| |
| static int config_file_open(git_config_backend *cfg, git_config_level_t level, const git_repository *repo) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| int res; |
| |
| b->level = level; |
| b->repo = repo; |
| |
| if ((res = git_config_entries_new(&b->entries)) < 0) |
| return res; |
| |
| if (!git_path_exists(b->file.path)) |
| return 0; |
| |
| /* |
| * git silently ignores configuration files that are not |
| * readable. We emulate that behavior. This is particularly |
| * important for sandboxed applications on macOS where the |
| * git configuration files may not be readable. |
| */ |
| if (p_access(b->file.path, R_OK) < 0) |
| return GIT_ENOTFOUND; |
| |
| if (res < 0 || (res = config_file_read(b->entries, repo, &b->file, level, 0)) < 0) { |
| git_config_entries_free(b->entries); |
| b->entries = NULL; |
| } |
| |
| return res; |
| } |
| |
| static int config_file_is_modified(int *modified, config_file *file) |
| { |
| config_file *include; |
| git_buf buf = GIT_BUF_INIT; |
| git_oid hash; |
| uint32_t i; |
| int error = 0; |
| |
| *modified = 0; |
| |
| if (!git_futils_filestamp_check(&file->stamp, file->path)) |
| goto check_includes; |
| |
| if ((error = git_futils_readbuffer(&buf, file->path)) < 0) |
| goto out; |
| |
| if ((error = git_hash_buf(&hash, buf.ptr, buf.size)) < 0) |
| goto out; |
| |
| if (!git_oid_equal(&hash, &file->checksum)) { |
| *modified = 1; |
| goto out; |
| } |
| |
| check_includes: |
| git_array_foreach(file->includes, i, include) { |
| if ((error = config_file_is_modified(modified, include)) < 0 || *modified) |
| goto out; |
| } |
| |
| out: |
| git_buf_dispose(&buf); |
| |
| return error; |
| } |
| |
| static int config_file_set_entries(git_config_backend *cfg, git_config_entries *entries) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *old = NULL; |
| config_file *include; |
| int error; |
| uint32_t i; |
| |
| if (b->parent.readonly) { |
| git_error_set(GIT_ERROR_CONFIG, "this backend is read-only"); |
| return -1; |
| } |
| |
| git_array_foreach(b->file.includes, i, include) |
| config_file_clear(include); |
| git_array_clear(b->file.includes); |
| |
| if ((error = git_mutex_lock(&b->values_mutex)) < 0) { |
| git_error_set(GIT_ERROR_OS, "failed to lock config backend"); |
| goto out; |
| } |
| |
| old = b->entries; |
| b->entries = entries; |
| |
| git_mutex_unlock(&b->values_mutex); |
| |
| out: |
| git_config_entries_free(old); |
| return error; |
| } |
| |
| static int config_file_refresh_from_buffer(git_config_backend *cfg, const char *buf, size_t buflen) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries = NULL; |
| int error; |
| |
| if ((error = git_config_entries_new(&entries)) < 0 || |
| (error = config_file_read_buffer(entries, b->repo, &b->file, |
| b->level, 0, buf, buflen)) < 0 || |
| (error = config_file_set_entries(cfg, entries)) < 0) |
| goto out; |
| |
| entries = NULL; |
| out: |
| git_config_entries_free(entries); |
| return error; |
| } |
| |
| static int config_file_refresh(git_config_backend *cfg) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries = NULL; |
| int error, modified; |
| |
| if (cfg->readonly) |
| return 0; |
| |
| if ((error = config_file_is_modified(&modified, &b->file)) < 0 && error != GIT_ENOTFOUND) |
| goto out; |
| |
| if (!modified) |
| return 0; |
| |
| if ((error = git_config_entries_new(&entries)) < 0 || |
| (error = config_file_read(entries, b->repo, &b->file, b->level, 0)) < 0 || |
| (error = config_file_set_entries(cfg, entries)) < 0) |
| goto out; |
| |
| entries = NULL; |
| out: |
| git_config_entries_free(entries); |
| |
| return (error == GIT_ENOTFOUND) ? 0 : error; |
| } |
| |
| static void config_file_free(git_config_backend *_backend) |
| { |
| config_file_backend *backend = GIT_CONTAINER_OF(_backend, config_file_backend, parent); |
| |
| if (backend == NULL) |
| return; |
| |
| config_file_clear(&backend->file); |
| git_config_entries_free(backend->entries); |
| git_mutex_free(&backend->values_mutex); |
| git__free(backend); |
| } |
| |
| static int config_file_iterator( |
| git_config_iterator **iter, |
| struct git_config_backend *backend) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(backend, config_file_backend, parent); |
| git_config_entries *dupped = NULL, *entries = NULL; |
| int error; |
| |
| if ((error = config_file_refresh(backend)) < 0 || |
| (error = config_file_entries_take(&entries, b)) < 0 || |
| (error = git_config_entries_dup(&dupped, entries)) < 0 || |
| (error = git_config_entries_iterator_new(iter, dupped)) < 0) |
| goto out; |
| |
| out: |
| /* Let iterator delete duplicated entries when it's done */ |
| git_config_entries_free(entries); |
| git_config_entries_free(dupped); |
| return error; |
| } |
| |
| static int config_file_snapshot(git_config_backend **out, git_config_backend *backend) |
| { |
| return git_config_backend_snapshot(out, backend); |
| } |
| |
| static int config_file_set(git_config_backend *cfg, const char *name, const char *value) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries; |
| git_config_entry *existing; |
| char *key, *esc_value = NULL; |
| int error; |
| |
| if ((error = git_config__normalize_name(name, &key)) < 0) |
| return error; |
| |
| if ((error = config_file_entries_take(&entries, b)) < 0) |
| return error; |
| |
| /* Check whether we'd be modifying an included or multivar key */ |
| if ((error = git_config_entries_get_unique(&existing, entries, key)) < 0) { |
| if (error != GIT_ENOTFOUND) |
| goto out; |
| error = 0; |
| } else if ((!existing->value && !value) || |
| (existing->value && value && !strcmp(existing->value, value))) { |
| /* don't update if old and new values already match */ |
| error = 0; |
| goto out; |
| } |
| |
| /* No early returns due to sanity checks, let's write it out and refresh */ |
| if (value) { |
| esc_value = escape_value(value); |
| GIT_ERROR_CHECK_ALLOC(esc_value); |
| } |
| |
| if ((error = config_file_write(b, name, key, NULL, esc_value)) < 0) |
| goto out; |
| |
| out: |
| git_config_entries_free(entries); |
| git__free(esc_value); |
| git__free(key); |
| return error; |
| } |
| |
| /* release the map containing the entry as an equivalent to freeing it */ |
| static void config_file_entry_free(git_config_entry *entry) |
| { |
| git_config_entries *entries = (git_config_entries *) entry->payload; |
| git_config_entries_free(entries); |
| } |
| |
| /* |
| * Internal function that actually gets the value in string form |
| */ |
| static int config_file_get(git_config_backend *cfg, const char *key, git_config_entry **out) |
| { |
| config_file_backend *h = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries = NULL; |
| git_config_entry *entry; |
| int error = 0; |
| |
| if (!h->parent.readonly && ((error = config_file_refresh(cfg)) < 0)) |
| return error; |
| |
| if ((error = config_file_entries_take(&entries, h)) < 0) |
| return error; |
| |
| if ((error = (git_config_entries_get(&entry, entries, key))) < 0) { |
| git_config_entries_free(entries); |
| return error; |
| } |
| |
| entry->free = config_file_entry_free; |
| entry->payload = entries; |
| *out = entry; |
| |
| return 0; |
| } |
| |
| static int config_file_set_multivar( |
| git_config_backend *cfg, const char *name, const char *regexp, const char *value) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_regexp preg; |
| int result; |
| char *key; |
| |
| assert(regexp); |
| |
| if ((result = git_config__normalize_name(name, &key)) < 0) |
| return result; |
| |
| if ((result = git_regexp_compile(&preg, regexp, 0)) < 0) |
| goto out; |
| |
| /* If we do have it, set call config_file_write() and reload */ |
| if ((result = config_file_write(b, name, key, &preg, value)) < 0) |
| goto out; |
| |
| out: |
| git__free(key); |
| git_regexp_dispose(&preg); |
| |
| return result; |
| } |
| |
| static int config_file_delete(git_config_backend *cfg, const char *name) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries = NULL; |
| git_config_entry *entry; |
| char *key = NULL; |
| int error; |
| |
| if ((error = git_config__normalize_name(name, &key)) < 0) |
| goto out; |
| |
| if ((error = config_file_entries_take(&entries, b)) < 0) |
| goto out; |
| |
| /* Check whether we'd be modifying an included or multivar key */ |
| if ((error = git_config_entries_get_unique(&entry, entries, key)) < 0) { |
| if (error == GIT_ENOTFOUND) |
| git_error_set(GIT_ERROR_CONFIG, "could not find key '%s' to delete", name); |
| goto out; |
| } |
| |
| if ((error = config_file_write(b, name, entry->name, NULL, NULL)) < 0) |
| goto out; |
| |
| out: |
| git_config_entries_free(entries); |
| git__free(key); |
| return error; |
| } |
| |
| static int config_file_delete_multivar(git_config_backend *cfg, const char *name, const char *regexp) |
| { |
| config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent); |
| git_config_entries *entries = NULL; |
| git_config_entry *entry = NULL; |
| git_regexp preg = GIT_REGEX_INIT; |
| char *key = NULL; |
| int result; |
| |
| if ((result = git_config__normalize_name(name, &key)) < 0) |
| goto out; |
| |
| if ((result = config_file_entries_take(&entries, b)) < 0) |
| goto out; |
| |
| if ((result = git_config_entries_get(&entry, entries, key)) < 0) { |
| if (result == GIT_ENOTFOUND) |
| git_error_set(GIT_ERROR_CONFIG, "could not find key '%s' to delete", name); |
| goto out; |
| } |
| |
| if ((result = git_regexp_compile(&preg, regexp, 0)) < 0) |
| goto out; |
| |
| if ((result = config_file_write(b, name, key, &preg, NULL)) < 0) |
| goto out; |
| |
| out: |
| git_config_entries_free(entries); |
| git__free(key); |
| git_regexp_dispose(&preg); |
| return result; |
| } |
| |
| static int config_file_lock(git_config_backend *_cfg) |
| { |
| config_file_backend *cfg = GIT_CONTAINER_OF(_cfg, config_file_backend, parent); |
| int error; |
| |
| if ((error = git_filebuf_open(&cfg->locked_buf, cfg->file.path, 0, GIT_CONFIG_FILE_MODE)) < 0) |
| return error; |
| |
| error = git_futils_readbuffer(&cfg->locked_content, cfg->file.path); |
| if (error < 0 && error != GIT_ENOTFOUND) { |
| git_filebuf_cleanup(&cfg->locked_buf); |
| return error; |
| } |
| |
| cfg->locked = true; |
| return 0; |
| |
| } |
| |
| static int config_file_unlock(git_config_backend *_cfg, int success) |
| { |
| config_file_backend *cfg = GIT_CONTAINER_OF(_cfg, config_file_backend, parent); |
| int error = 0; |
| |
| if (success) { |
| git_filebuf_write(&cfg->locked_buf, cfg->locked_content.ptr, cfg->locked_content.size); |
| error = git_filebuf_commit(&cfg->locked_buf); |
| } |
| |
| git_filebuf_cleanup(&cfg->locked_buf); |
| git_buf_dispose(&cfg->locked_content); |
| cfg->locked = false; |
| |
| return error; |
| } |
| |
| int git_config_backend_from_file(git_config_backend **out, const char *path) |
| { |
| config_file_backend *backend; |
| |
| backend = git__calloc(1, sizeof(config_file_backend)); |
| GIT_ERROR_CHECK_ALLOC(backend); |
| |
| backend->parent.version = GIT_CONFIG_BACKEND_VERSION; |
| git_mutex_init(&backend->values_mutex); |
| |
| backend->file.path = git__strdup(path); |
| GIT_ERROR_CHECK_ALLOC(backend->file.path); |
| git_array_init(backend->file.includes); |
| |
| backend->parent.open = config_file_open; |
| backend->parent.get = config_file_get; |
| backend->parent.set = config_file_set; |
| backend->parent.set_multivar = config_file_set_multivar; |
| backend->parent.del = config_file_delete; |
| backend->parent.del_multivar = config_file_delete_multivar; |
| backend->parent.iterator = config_file_iterator; |
| backend->parent.snapshot = config_file_snapshot; |
| backend->parent.lock = config_file_lock; |
| backend->parent.unlock = config_file_unlock; |
| backend->parent.free = config_file_free; |
| |
| *out = (git_config_backend *)backend; |
| |
| return 0; |
| } |
| |
| static int included_path(git_buf *out, const char *dir, const char *path) |
| { |
| /* From the user's home */ |
| if (path[0] == '~' && path[1] == '/') |
| return git_sysdir_expand_global_file(out, &path[1]); |
| |
| return git_path_join_unrooted(out, path, dir, NULL); |
| } |
| |
| /* Escape the values to write them to the file */ |
| static char *escape_value(const char *ptr) |
| { |
| git_buf buf; |
| size_t len; |
| const char *esc; |
| |
| assert(ptr); |
| |
| len = strlen(ptr); |
| if (!len) |
| return git__calloc(1, sizeof(char)); |
| |
| if (git_buf_init(&buf, len) < 0) |
| return NULL; |
| |
| while (*ptr != '\0') { |
| if ((esc = strchr(git_config_escaped, *ptr)) != NULL) { |
| git_buf_putc(&buf, '\\'); |
| git_buf_putc(&buf, git_config_escapes[esc - git_config_escaped]); |
| } else { |
| git_buf_putc(&buf, *ptr); |
| } |
| ptr++; |
| } |
| |
| if (git_buf_oom(&buf)) |
| return NULL; |
| |
| return git_buf_detach(&buf); |
| } |
| |
| static int parse_include(config_file_parse_data *parse_data, const char *file) |
| { |
| config_file *include; |
| git_buf path = GIT_BUF_INIT; |
| char *dir; |
| int result; |
| |
| if (!file) |
| return 0; |
| |
| if ((result = git_path_dirname_r(&path, parse_data->file->path)) < 0) |
| return result; |
| |
| dir = git_buf_detach(&path); |
| result = included_path(&path, dir, file); |
| git__free(dir); |
| |
| if (result < 0) |
| return result; |
| |
| include = git_array_alloc(parse_data->file->includes); |
| GIT_ERROR_CHECK_ALLOC(include); |
| memset(include, 0, sizeof(*include)); |
| git_array_init(include->includes); |
| include->path = git_buf_detach(&path); |
| |
| result = config_file_read(parse_data->entries, parse_data->repo, include, |
| parse_data->level, parse_data->depth+1); |
| |
| if (result == GIT_ENOTFOUND) { |
| git_error_clear(); |
| result = 0; |
| } |
| |
| return result; |
| } |
| |
| static int do_match_gitdir( |
| int *matches, |
| const git_repository *repo, |
| const char *cfg_file, |
| const char *condition, |
| bool case_insensitive) |
| { |
| git_buf pattern = GIT_BUF_INIT, gitdir = GIT_BUF_INIT; |
| int error; |
| |
| if (condition[0] == '.' && git_path_is_dirsep(condition[1])) { |
| git_path_dirname_r(&pattern, cfg_file); |
| git_buf_joinpath(&pattern, pattern.ptr, condition + 2); |
| } else if (condition[0] == '~' && git_path_is_dirsep(condition[1])) |
| git_sysdir_expand_global_file(&pattern, condition + 1); |
| else if (!git_path_is_absolute(condition)) |
| git_buf_joinpath(&pattern, "**", condition); |
| else |
| git_buf_sets(&pattern, condition); |
| |
| if (git_path_is_dirsep(condition[strlen(condition) - 1])) |
| git_buf_puts(&pattern, "**"); |
| |
| if (git_buf_oom(&pattern)) { |
| error = -1; |
| goto out; |
| } |
| |
| if ((error = git_repository_item_path(&gitdir, repo, GIT_REPOSITORY_ITEM_GITDIR)) < 0) |
| goto out; |
| |
| if (git_path_is_dirsep(gitdir.ptr[gitdir.size - 1])) |
| git_buf_truncate(&gitdir, gitdir.size - 1); |
| |
| *matches = wildmatch(pattern.ptr, gitdir.ptr, |
| WM_PATHNAME | (case_insensitive ? WM_CASEFOLD : 0)) == WM_MATCH; |
| out: |
| git_buf_dispose(&pattern); |
| git_buf_dispose(&gitdir); |
| return error; |
| } |
| |
| static int conditional_match_gitdir( |
| int *matches, |
| const git_repository *repo, |
| const char *cfg_file, |
| const char *value) |
| { |
| return do_match_gitdir(matches, repo, cfg_file, value, false); |
| } |
| |
| static int conditional_match_gitdir_i( |
| int *matches, |
| const git_repository *repo, |
| const char *cfg_file, |
| const char *value) |
| { |
| return do_match_gitdir(matches, repo, cfg_file, value, true); |
| } |
| |
| static int conditional_match_onbranch( |
| int *matches, |
| const git_repository *repo, |
| const char *cfg_file, |
| const char *condition) |
| { |
| git_buf reference = GIT_BUF_INIT, buf = GIT_BUF_INIT; |
| int error; |
| |
| GIT_UNUSED(cfg_file); |
| |
| /* |
| * NOTE: you cannot use `git_repository_head` here. Looking up the |
| * HEAD reference will create the ODB, which causes us to read the |
| * repo's config for keys like core.precomposeUnicode. As we're |
| * just parsing the config right now, though, this would result in |
| * an endless recursion. |
| */ |
| |
| if ((error = git_buf_joinpath(&buf, git_repository_path(repo), GIT_HEAD_FILE)) < 0 || |
| (error = git_futils_readbuffer(&reference, buf.ptr)) < 0) |
| goto out; |
| git_buf_rtrim(&reference); |
| |
| if (git__strncmp(reference.ptr, GIT_SYMREF, strlen(GIT_SYMREF))) |
| goto out; |
| git_buf_consume(&reference, reference.ptr + strlen(GIT_SYMREF)); |
| |
| if (git__strncmp(reference.ptr, GIT_REFS_HEADS_DIR, strlen(GIT_REFS_HEADS_DIR))) |
| goto out; |
| git_buf_consume(&reference, reference.ptr + strlen(GIT_REFS_HEADS_DIR)); |
| |
| /* |
| * If the condition ends with a '/', then we should treat it as if |
| * it had '**' appended. |
| */ |
| if ((error = git_buf_sets(&buf, condition)) < 0) |
| goto out; |
| if (git_path_is_dirsep(condition[strlen(condition) - 1]) && |
| (error = git_buf_puts(&buf, "**")) < 0) |
| goto out; |
| |
| *matches = wildmatch(buf.ptr, reference.ptr, WM_PATHNAME) == WM_MATCH; |
| out: |
| git_buf_dispose(&reference); |
| git_buf_dispose(&buf); |
| |
| return error; |
| |
| } |
| |
| static const struct { |
| const char *prefix; |
| int (*matches)(int *matches, const git_repository *repo, const char *cfg, const char *value); |
| } conditions[] = { |
| { "gitdir:", conditional_match_gitdir }, |
| { "gitdir/i:", conditional_match_gitdir_i }, |
| { "onbranch:", conditional_match_onbranch } |
| }; |
| |
| static int parse_conditional_include(config_file_parse_data *parse_data, const char *section, const char *file) |
| { |
| char *condition; |
| size_t i; |
| int error = 0, matches; |
| |
| if (!parse_data->repo || !file) |
| return 0; |
| |
| condition = git__substrdup(section + strlen("includeIf."), |
| strlen(section) - strlen("includeIf.") - strlen(".path")); |
| |
| for (i = 0; i < ARRAY_SIZE(conditions); i++) { |
| if (git__prefixcmp(condition, conditions[i].prefix)) |
| continue; |
| |
| if ((error = conditions[i].matches(&matches, |
| parse_data->repo, |
| parse_data->file->path, |
| condition + strlen(conditions[i].prefix))) < 0) |
| break; |
| |
| if (matches) |
| error = parse_include(parse_data, file); |
| |
| break; |
| } |
| |
| git__free(condition); |
| return error; |
| } |
| |
| static int read_on_variable( |
| git_config_parser *reader, |
| const char *current_section, |
| const char *var_name, |
| const char *var_value, |
| const char *line, |
| size_t line_len, |
| void *data) |
| { |
| config_file_parse_data *parse_data = (config_file_parse_data *)data; |
| git_buf buf = GIT_BUF_INIT; |
| git_config_entry *entry; |
| const char *c; |
| int result = 0; |
| |
| GIT_UNUSED(reader); |
| GIT_UNUSED(line); |
| GIT_UNUSED(line_len); |
| |
| if (current_section) { |
| /* TODO: Once warnings lang, we should likely warn |
| * here. Git appears to warn in most cases if it sees |
| * un-namespaced config options. |
| */ |
| git_buf_puts(&buf, current_section); |
| git_buf_putc(&buf, '.'); |
| } |
| |
| for (c = var_name; *c; c++) |
| git_buf_putc(&buf, git__tolower(*c)); |
| |
| if (git_buf_oom(&buf)) |
| return -1; |
| |
| entry = git__calloc(1, sizeof(git_config_entry)); |
| GIT_ERROR_CHECK_ALLOC(entry); |
| entry->name = git_buf_detach(&buf); |
| entry->value = var_value ? git__strdup(var_value) : NULL; |
| entry->level = parse_data->level; |
| entry->include_depth = parse_data->depth; |
| |
| if ((result = git_config_entries_append(parse_data->entries, entry)) < 0) |
| return result; |
| |
| result = 0; |
| |
| /* Add or append the new config option */ |
| if (!git__strcmp(entry->name, "include.path")) |
| result = parse_include(parse_data, entry->value); |
| else if (!git__prefixcmp(entry->name, "includeif.") && |
| !git__suffixcmp(entry->name, ".path")) |
| result = parse_conditional_include(parse_data, entry->name, entry->value); |
| |
| return result; |
| } |
| |
| static int config_file_read_buffer( |
| git_config_entries *entries, |
| const git_repository *repo, |
| config_file *file, |
| git_config_level_t level, |
| int depth, |
| const char *buf, |
| size_t buflen) |
| { |
| config_file_parse_data parse_data; |
| git_config_parser reader; |
| int error; |
| |
| if (depth >= MAX_INCLUDE_DEPTH) { |
| git_error_set(GIT_ERROR_CONFIG, "maximum config include depth reached"); |
| return -1; |
| } |
| |
| /* Initialize the reading position */ |
| reader.path = file->path; |
| git_parse_ctx_init(&reader.ctx, buf, buflen); |
| |
| /* If the file is empty, there's nothing for us to do */ |
| if (!reader.ctx.content || *reader.ctx.content == '\0') { |
| error = 0; |
| goto out; |
| } |
| |
| parse_data.repo = repo; |
| parse_data.file = file; |
| parse_data.entries = entries; |
| parse_data.level = level; |
| parse_data.depth = depth; |
| |
| error = git_config_parse(&reader, NULL, read_on_variable, NULL, NULL, &parse_data); |
| |
| out: |
| return error; |
| } |
| |
| static int config_file_read( |
| git_config_entries *entries, |
| const git_repository *repo, |
| config_file *file, |
| git_config_level_t level, |
| int depth) |
| { |
| git_buf contents = GIT_BUF_INIT; |
| struct stat st; |
| int error; |
| |
| if (p_stat(file->path, &st) < 0) { |
| error = git_path_set_error(errno, file->path, "stat"); |
| goto out; |
| } |
| |
| if ((error = git_futils_readbuffer(&contents, file->path)) < 0) |
| goto out; |
| |
| git_futils_filestamp_set_from_stat(&file->stamp, &st); |
| if ((error = git_hash_buf(&file->checksum, contents.ptr, contents.size)) < 0) |
| goto out; |
| |
| if ((error = config_file_read_buffer(entries, repo, file, level, depth, |
| contents.ptr, contents.size)) < 0) |
| goto out; |
| |
| out: |
| git_buf_dispose(&contents); |
| return error; |
| } |
| |
| static int write_section(git_buf *fbuf, const char *key) |
| { |
| int result; |
| const char *dot; |
| git_buf buf = GIT_BUF_INIT; |
| |
| /* All of this just for [section "subsection"] */ |
| dot = strchr(key, '.'); |
| git_buf_putc(&buf, '['); |
| if (dot == NULL) { |
| git_buf_puts(&buf, key); |
| } else { |
| char *escaped; |
| git_buf_put(&buf, key, dot - key); |
| escaped = escape_value(dot + 1); |
| GIT_ERROR_CHECK_ALLOC(escaped); |
| git_buf_printf(&buf, " \"%s\"", escaped); |
| git__free(escaped); |
| } |
| git_buf_puts(&buf, "]\n"); |
| |
| if (git_buf_oom(&buf)) |
| return -1; |
| |
| result = git_buf_put(fbuf, git_buf_cstr(&buf), buf.size); |
| git_buf_dispose(&buf); |
| |
| return result; |
| } |
| |
| static const char *quotes_for_value(const char *value) |
| { |
| const char *ptr; |
| |
| if (value[0] == ' ' || value[0] == '\0') |
| return "\""; |
| |
| for (ptr = value; *ptr; ++ptr) { |
| if (*ptr == ';' || *ptr == '#') |
| return "\""; |
| } |
| |
| if (ptr[-1] == ' ') |
| return "\""; |
| |
| return ""; |
| } |
| |
| struct write_data { |
| git_buf *buf; |
| git_buf buffered_comment; |
| unsigned int in_section : 1, |
| preg_replaced : 1; |
| const char *orig_section; |
| const char *section; |
| const char *orig_name; |
| const char *name; |
| const git_regexp *preg; |
| const char *value; |
| }; |
| |
| static int write_line_to(git_buf *buf, const char *line, size_t line_len) |
| { |
| int result = git_buf_put(buf, line, line_len); |
| |
| if (!result && line_len && line[line_len-1] != '\n') |
| result = git_buf_printf(buf, "\n"); |
| |
| return result; |
| } |
| |
| static int write_line(struct write_data *write_data, const char *line, size_t line_len) |
| { |
| return write_line_to(write_data->buf, line, line_len); |
| } |
| |
| static int write_value(struct write_data *write_data) |
| { |
| const char *q; |
| int result; |
| |
| q = quotes_for_value(write_data->value); |
| result = git_buf_printf(write_data->buf, |
| "\t%s = %s%s%s\n", write_data->orig_name, q, write_data->value, q); |
| |
| /* If we are updating a single name/value, we're done. Setting `value` |
| * to `NULL` will prevent us from trying to write it again later (in |
| * `write_on_section`) if we see the same section repeated. |
| */ |
| if (!write_data->preg) |
| write_data->value = NULL; |
| |
| return result; |
| } |
| |
| static int write_on_section( |
| git_config_parser *reader, |
| const char *current_section, |
| const char *line, |
| size_t line_len, |
| void *data) |
| { |
| struct write_data *write_data = (struct write_data *)data; |
| int result = 0; |
| |
| GIT_UNUSED(reader); |
| |
| /* If we were previously in the correct section (but aren't anymore) |
| * and haven't written our value (for a simple name/value set, not |
| * a multivar), then append it to the end of the section before writing |
| * the new one. |
| */ |
| if (write_data->in_section && !write_data->preg && write_data->value) |
| result = write_value(write_data); |
| |
| write_data->in_section = strcmp(current_section, write_data->section) == 0; |
| |
| /* |
| * If there were comments just before this section, dump them as well. |
| */ |
| if (!result) { |
| result = git_buf_put(write_data->buf, write_data->buffered_comment.ptr, write_data->buffered_comment.size); |
| git_buf_clear(&write_data->buffered_comment); |
| } |
| |
| if (!result) |
| result = write_line(write_data, line, line_len); |
| |
| return result; |
| } |
| |
| static int write_on_variable( |
| git_config_parser *reader, |
| const char *current_section, |
| const char *var_name, |
| const char *var_value, |
| const char *line, |
| size_t line_len, |
| void *data) |
| { |
| struct write_data *write_data = (struct write_data *)data; |
| bool has_matched = false; |
| int error; |
| |
| GIT_UNUSED(reader); |
| GIT_UNUSED(current_section); |
| |
| /* |
| * If there were comments just before this variable, let's dump them as well. |
| */ |
| if ((error = git_buf_put(write_data->buf, write_data->buffered_comment.ptr, write_data->buffered_comment.size)) < 0) |
| return error; |
| |
| git_buf_clear(&write_data->buffered_comment); |
| |
| /* See if we are to update this name/value pair; first examine name */ |
| if (write_data->in_section && |
| strcasecmp(write_data->name, var_name) == 0) |
| has_matched = true; |
| |
| /* If we have a regex to match the value, see if it matches */ |
| if (has_matched && write_data->preg != NULL) |
| has_matched = (git_regexp_match(write_data->preg, var_value) == 0); |
| |
| /* If this isn't the name/value we're looking for, simply dump the |
| * existing data back out and continue on. |
| */ |
| if (!has_matched) |
| return write_line(write_data, line, line_len); |
| |
| write_data->preg_replaced = 1; |
| |
| /* If value is NULL, we are deleting this value; write nothing. */ |
| if (!write_data->value) |
| return 0; |
| |
| return write_value(write_data); |
| } |
| |
| static int write_on_comment(git_config_parser *reader, const char *line, size_t line_len, void *data) |
| { |
| struct write_data *write_data; |
| |
| GIT_UNUSED(reader); |
| |
| write_data = (struct write_data *)data; |
| return write_line_to(&write_data->buffered_comment, line, line_len); |
| } |
| |
| static int write_on_eof( |
| git_config_parser *reader, const char *current_section, void *data) |
| { |
| struct write_data *write_data = (struct write_data *)data; |
| int result = 0; |
| |
| GIT_UNUSED(reader); |
| |
| /* |
| * If we've buffered comments when reaching EOF, make sure to dump them. |
| */ |
| if ((result = git_buf_put(write_data->buf, write_data->buffered_comment.ptr, write_data->buffered_comment.size)) < 0) |
| return result; |
| |
| /* If we are at the EOF and have not written our value (again, for a |
| * simple name/value set, not a multivar) then we have never seen the |
| * section in question and should create a new section and write the |
| * value. |
| */ |
| if ((!write_data->preg || !write_data->preg_replaced) && write_data->value) { |
| /* write the section header unless we're already in it */ |
| if (!current_section || strcmp(current_section, write_data->section)) |
| result = write_section(write_data->buf, write_data->orig_section); |
| |
| if (!result) |
| result = write_value(write_data); |
| } |
| |
| return result; |
| } |
| |
| /* |
| * This is pretty much the parsing, except we write out anything we don't have |
| */ |
| static int config_file_write(config_file_backend *cfg, const char *orig_key, const char *key, const git_regexp *preg, const char* value) |
| |
| { |
| char *orig_section = NULL, *section = NULL, *orig_name, *name, *ldot; |
| git_buf buf = GIT_BUF_INIT, contents = GIT_BUF_INIT; |
| git_config_parser parser = GIT_CONFIG_PARSER_INIT; |
| git_filebuf file = GIT_FILEBUF_INIT; |
| struct write_data write_data; |
| int error; |
| |
| memset(&write_data, 0, sizeof(write_data)); |
| |
| if (cfg->locked) { |
| error = git_buf_puts(&contents, git_buf_cstr(&cfg->locked_content) == NULL ? "" : git_buf_cstr(&cfg->locked_content)); |
| } else { |
| if ((error = git_filebuf_open(&file, cfg->file.path, GIT_FILEBUF_HASH_CONTENTS, |
| GIT_CONFIG_FILE_MODE)) < 0) |
| goto done; |
| |
| /* We need to read in our own config file */ |
| error = git_futils_readbuffer(&contents, cfg->file.path); |
| } |
| if (error < 0 && error != GIT_ENOTFOUND) |
| goto done; |
| |
| if ((git_config_parser_init(&parser, cfg->file.path, contents.ptr, contents.size)) < 0) |
| goto done; |
| |
| ldot = strrchr(key, '.'); |
| name = ldot + 1; |
| section = git__strndup(key, ldot - key); |
| GIT_ERROR_CHECK_ALLOC(section); |
| |
| ldot = strrchr(orig_key, '.'); |
| orig_name = ldot + 1; |
| orig_section = git__strndup(orig_key, ldot - orig_key); |
| GIT_ERROR_CHECK_ALLOC(orig_section); |
| |
| write_data.buf = &buf; |
| write_data.orig_section = orig_section; |
| write_data.section = section; |
| write_data.orig_name = orig_name; |
| write_data.name = name; |
| write_data.preg = preg; |
| write_data.value = value; |
| |
| if ((error = git_config_parse(&parser, write_on_section, write_on_variable, |
| write_on_comment, write_on_eof, &write_data)) < 0) |
| goto done; |
| |
| if (cfg->locked) { |
| size_t len = buf.asize; |
| /* Update our copy with the modified contents */ |
| git_buf_dispose(&cfg->locked_content); |
| git_buf_attach(&cfg->locked_content, git_buf_detach(&buf), len); |
| } else { |
| git_filebuf_write(&file, git_buf_cstr(&buf), git_buf_len(&buf)); |
| |
| if ((error = git_filebuf_commit(&file)) < 0) |
| goto done; |
| |
| if ((error = config_file_refresh_from_buffer(&cfg->parent, buf.ptr, buf.size)) < 0) |
| goto done; |
| } |
| |
| done: |
| git__free(section); |
| git__free(orig_section); |
| git_buf_dispose(&write_data.buffered_comment); |
| git_buf_dispose(&buf); |
| git_buf_dispose(&contents); |
| git_filebuf_cleanup(&file); |
| git_config_parser_dispose(&parser); |
| |
| return error; |
| } |