--- /dev/null
+/*
+ * 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 "attr_file.h"
+
+#include "repository.h"
+#include "filebuf.h"
+#include "attrcache.h"
+#include "git2/blob.h"
+#include "git2/tree.h"
+#include "blob.h"
+#include "index.h"
+#include "wildmatch.h"
+#include <ctype.h>
+
+static void attr_file_free(git_attr_file *file)
+{
+ bool unlock = !git_mutex_lock(&file->lock);
+ git_attr_file__clear_rules(file, false);
+ git_pool_clear(&file->pool);
+ if (unlock)
+ git_mutex_unlock(&file->lock);
+ git_mutex_free(&file->lock);
+
+ git__memzero(file, sizeof(*file));
+ git__free(file);
+}
+
+int git_attr_file__new(
+ git_attr_file **out,
+ git_attr_file_entry *entry,
+ git_attr_file_source *source)
+{
+ git_attr_file *attrs = git__calloc(1, sizeof(git_attr_file));
+ GIT_ERROR_CHECK_ALLOC(attrs);
+
+ if (git_mutex_init(&attrs->lock) < 0) {
+ git_error_set(GIT_ERROR_OS, "failed to initialize lock");
+ goto on_error;
+ }
+
+ if (git_pool_init(&attrs->pool, 1) < 0)
+ goto on_error;
+
+ GIT_REFCOUNT_INC(attrs);
+ attrs->entry = entry;
+ memcpy(&attrs->source, source, sizeof(git_attr_file_source));
+ *out = attrs;
+ return 0;
+
+on_error:
+ git__free(attrs);
+ return -1;
+}
+
+int git_attr_file__clear_rules(git_attr_file *file, bool need_lock)
+{
+ unsigned int i;
+ git_attr_rule *rule;
+
+ if (need_lock && git_mutex_lock(&file->lock) < 0) {
+ git_error_set(GIT_ERROR_OS, "failed to lock attribute file");
+ return -1;
+ }
+
+ git_vector_foreach(&file->rules, i, rule)
+ git_attr_rule__free(rule);
+ git_vector_free(&file->rules);
+
+ if (need_lock)
+ git_mutex_unlock(&file->lock);
+
+ return 0;
+}
+
+void git_attr_file__free(git_attr_file *file)
+{
+ if (!file)
+ return;
+ GIT_REFCOUNT_DEC(file, attr_file_free);
+}
+
+static int attr_file_oid_from_index(
+ git_oid *oid, git_repository *repo, const char *path)
+{
+ int error;
+ git_index *idx;
+ size_t pos;
+ const git_index_entry *entry;
+
+ if ((error = git_repository_index__weakptr(&idx, repo)) < 0 ||
+ (error = git_index__find_pos(&pos, idx, path, 0, 0)) < 0)
+ return error;
+
+ if (!(entry = git_index_get_byindex(idx, pos)))
+ return GIT_ENOTFOUND;
+
+ *oid = entry->id;
+ return 0;
+}
+
+int git_attr_file__load(
+ git_attr_file **out,
+ git_repository *repo,
+ git_attr_session *attr_session,
+ git_attr_file_entry *entry,
+ git_attr_file_source *source,
+ git_attr_file_parser parser,
+ bool allow_macros)
+{
+ int error = 0;
+ git_commit *commit = NULL;
+ git_tree *tree = NULL;
+ git_tree_entry *tree_entry = NULL;
+ git_blob *blob = NULL;
+ git_str content = GIT_STR_INIT;
+ const char *content_str;
+ git_attr_file *file;
+ struct stat st;
+ bool nonexistent = false;
+ int bom_offset;
+ git_str_bom_t bom;
+ git_oid id;
+ git_object_size_t blobsize;
+
+ *out = NULL;
+
+ switch (source->type) {
+ case GIT_ATTR_FILE_SOURCE_MEMORY:
+ /* in-memory attribute file doesn't need data */
+ break;
+ case GIT_ATTR_FILE_SOURCE_INDEX: {
+ if ((error = attr_file_oid_from_index(&id, repo, entry->path)) < 0 ||
+ (error = git_blob_lookup(&blob, repo, &id)) < 0)
+ return error;
+
+ /* Do not assume that data straight from the ODB is NULL-terminated;
+ * copy the contents of a file to a buffer to work on */
+ blobsize = git_blob_rawsize(blob);
+
+ GIT_ERROR_CHECK_BLOBSIZE(blobsize);
+ git_str_put(&content, git_blob_rawcontent(blob), (size_t)blobsize);
+ break;
+ }
+ case GIT_ATTR_FILE_SOURCE_FILE: {
+ int fd = -1;
+
+ /* For open or read errors, pretend that we got ENOTFOUND. */
+ /* TODO: issue warning when warning API is available */
+
+ if (p_stat(entry->fullpath, &st) < 0 ||
+ S_ISDIR(st.st_mode) ||
+ (fd = git_futils_open_ro(entry->fullpath)) < 0 ||
+ (error = git_futils_readbuffer_fd(&content, fd, (size_t)st.st_size)) < 0)
+ nonexistent = true;
+
+ if (fd >= 0)
+ p_close(fd);
+
+ break;
+ }
+ case GIT_ATTR_FILE_SOURCE_HEAD:
+ case GIT_ATTR_FILE_SOURCE_COMMIT: {
+ if (source->type == GIT_ATTR_FILE_SOURCE_COMMIT) {
+ if ((error = git_commit_lookup(&commit, repo, source->commit_id)) < 0 ||
+ (error = git_commit_tree(&tree, commit)) < 0)
+ goto cleanup;
+ } else {
+ if ((error = git_repository_head_tree(&tree, repo)) < 0)
+ goto cleanup;
+ }
+
+ if ((error = git_tree_entry_bypath(&tree_entry, tree, entry->path)) < 0) {
+ /*
+ * If the attributes file does not exist, we can
+ * cache an empty file for this commit to prevent
+ * needless future lookups.
+ */
+ if (error == GIT_ENOTFOUND) {
+ error = 0;
+ break;
+ }
+
+ goto cleanup;
+ }
+
+ if ((error = git_blob_lookup(&blob, repo, git_tree_entry_id(tree_entry))) < 0)
+ goto cleanup;
+
+ /*
+ * Do not assume that data straight from the ODB is NULL-terminated;
+ * copy the contents of a file to a buffer to work on.
+ */
+ blobsize = git_blob_rawsize(blob);
+
+ GIT_ERROR_CHECK_BLOBSIZE(blobsize);
+ if ((error = git_str_put(&content,
+ git_blob_rawcontent(blob), (size_t)blobsize)) < 0)
+ goto cleanup;
+
+ break;
+ }
+ default:
+ git_error_set(GIT_ERROR_INVALID, "unknown file source %d", source->type);
+ return -1;
+ }
+
+ if ((error = git_attr_file__new(&file, entry, source)) < 0)
+ goto cleanup;
+
+ /* advance over a UTF8 BOM */
+ content_str = git_str_cstr(&content);
+ bom_offset = git_str_detect_bom(&bom, &content);
+
+ if (bom == GIT_STR_BOM_UTF8)
+ content_str += bom_offset;
+
+ /* store the key of the attr_reader; don't bother with cache
+ * invalidation during the same attr reader session.
+ */
+ if (attr_session)
+ file->session_key = attr_session->key;
+
+ if (parser && (error = parser(repo, file, content_str, allow_macros)) < 0) {
+ git_attr_file__free(file);
+ goto cleanup;
+ }
+
+ /* write cache breakers */
+ if (nonexistent)
+ file->nonexistent = 1;
+ else if (source->type == GIT_ATTR_FILE_SOURCE_INDEX)
+ git_oid_cpy(&file->cache_data.oid, git_blob_id(blob));
+ else if (source->type == GIT_ATTR_FILE_SOURCE_HEAD)
+ git_oid_cpy(&file->cache_data.oid, git_tree_id(tree));
+ else if (source->type == GIT_ATTR_FILE_SOURCE_COMMIT)
+ git_oid_cpy(&file->cache_data.oid, git_tree_id(tree));
+ else if (source->type == GIT_ATTR_FILE_SOURCE_FILE)
+ git_futils_filestamp_set_from_stat(&file->cache_data.stamp, &st);
+ /* else always cacheable */
+
+ *out = file;
+
+cleanup:
+ git_blob_free(blob);
+ git_tree_entry_free(tree_entry);
+ git_tree_free(tree);
+ git_commit_free(commit);
+ git_str_dispose(&content);
+
+ return error;
+}
+
+int git_attr_file__out_of_date(
+ git_repository *repo,
+ git_attr_session *attr_session,
+ git_attr_file *file,
+ git_attr_file_source *source)
+{
+ if (!file)
+ return 1;
+
+ /* we are never out of date if we just created this data in the same
+ * attr_session; otherwise, nonexistent files must be invalidated
+ */
+ if (attr_session && attr_session->key == file->session_key)
+ return 0;
+ else if (file->nonexistent)
+ return 1;
+
+ switch (file->source.type) {
+ case GIT_ATTR_FILE_SOURCE_MEMORY:
+ return 0;
+
+ case GIT_ATTR_FILE_SOURCE_FILE:
+ return git_futils_filestamp_check(
+ &file->cache_data.stamp, file->entry->fullpath);
+
+ case GIT_ATTR_FILE_SOURCE_INDEX: {
+ int error;
+ git_oid id;
+
+ if ((error = attr_file_oid_from_index(
+ &id, repo, file->entry->path)) < 0)
+ return error;
+
+ return (git_oid__cmp(&file->cache_data.oid, &id) != 0);
+ }
+
+ case GIT_ATTR_FILE_SOURCE_HEAD: {
+ git_tree *tree = NULL;
+ int error = git_repository_head_tree(&tree, repo);
+
+ if (error < 0)
+ return error;
+
+ error = (git_oid__cmp(&file->cache_data.oid, git_tree_id(tree)) != 0);
+
+ git_tree_free(tree);
+ return error;
+ }
+
+ case GIT_ATTR_FILE_SOURCE_COMMIT: {
+ git_commit *commit = NULL;
+ git_tree *tree = NULL;
+ int error;
+
+ if ((error = git_commit_lookup(&commit, repo, source->commit_id)) < 0)
+ return error;
+
+ error = git_commit_tree(&tree, commit);
+ git_commit_free(commit);
+
+ if (error < 0)
+ return error;
+
+ error = (git_oid__cmp(&file->cache_data.oid, git_tree_id(tree)) != 0);
+
+ git_tree_free(tree);
+ return error;
+ }
+
+ default:
+ git_error_set(GIT_ERROR_INVALID, "invalid file type %d", file->source.type);
+ return -1;
+ }
+}
+
+static int sort_by_hash_and_name(const void *a_raw, const void *b_raw);
+static void git_attr_rule__clear(git_attr_rule *rule);
+static bool parse_optimized_patterns(
+ git_attr_fnmatch *spec,
+ git_pool *pool,
+ const char *pattern);
+
+int git_attr_file__parse_buffer(
+ git_repository *repo, git_attr_file *attrs, const char *data, bool allow_macros)
+{
+ const char *scan = data, *context = NULL;
+ git_attr_rule *rule = NULL;
+ int error = 0;
+
+ /* If subdir file path, convert context for file paths */
+ if (attrs->entry && git_fs_path_root(attrs->entry->path) < 0 &&
+ !git__suffixcmp(attrs->entry->path, "/" GIT_ATTR_FILE))
+ context = attrs->entry->path;
+
+ if (git_mutex_lock(&attrs->lock) < 0) {
+ git_error_set(GIT_ERROR_OS, "failed to lock attribute file");
+ return -1;
+ }
+
+ while (!error && *scan) {
+ /* Allocate rule if needed, otherwise re-use previous rule */
+ if (!rule) {
+ rule = git__calloc(1, sizeof(*rule));
+ GIT_ERROR_CHECK_ALLOC(rule);
+ } else
+ git_attr_rule__clear(rule);
+
+ rule->match.flags = GIT_ATTR_FNMATCH_ALLOWNEG | GIT_ATTR_FNMATCH_ALLOWMACRO;
+
+ /* Parse the next "pattern attr attr attr" line */
+ if ((error = git_attr_fnmatch__parse(&rule->match, &attrs->pool, context, &scan)) < 0 ||
+ (error = git_attr_assignment__parse(repo, &attrs->pool, &rule->assigns, &scan)) < 0)
+ {
+ if (error != GIT_ENOTFOUND)
+ goto out;
+ error = 0;
+ continue;
+ }
+
+ if (rule->match.flags & GIT_ATTR_FNMATCH_MACRO) {
+ /* TODO: warning if macro found in file below repo root */
+ if (!allow_macros)
+ continue;
+ if ((error = git_attr_cache__insert_macro(repo, rule)) < 0)
+ goto out;
+ } else if ((error = git_vector_insert(&attrs->rules, rule)) < 0)
+ goto out;
+
+ rule = NULL;
+ }
+
+out:
+ git_mutex_unlock(&attrs->lock);
+ git_attr_rule__free(rule);
+
+ return error;
+}
+
+uint32_t git_attr_file__name_hash(const char *name)
+{
+ uint32_t h = 5381;
+ int c;
+
+ GIT_ASSERT_ARG(name);
+
+ while ((c = (int)*name++) != 0)
+ h = ((h << 5) + h) + c;
+ return h;
+}
+
+int git_attr_file__lookup_one(
+ git_attr_file *file,
+ git_attr_path *path,
+ const char *attr,
+ const char **value)
+{
+ size_t i;
+ git_attr_name name;
+ git_attr_rule *rule;
+
+ *value = NULL;
+
+ name.name = attr;
+ name.name_hash = git_attr_file__name_hash(attr);
+
+ git_attr_file__foreach_matching_rule(file, path, i, rule) {
+ size_t pos;
+
+ if (!git_vector_bsearch(&pos, &rule->assigns, &name)) {
+ *value = ((git_attr_assignment *)
+ git_vector_get(&rule->assigns, pos))->value;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+int git_attr_file__load_standalone(git_attr_file **out, const char *path)
+{
+ git_str content = GIT_STR_INIT;
+ git_attr_file_source source = { GIT_ATTR_FILE_SOURCE_FILE };
+ git_attr_file *file = NULL;
+ int error;
+
+ if ((error = git_futils_readbuffer(&content, path)) < 0)
+ goto out;
+
+ /*
+ * Because the cache entry is allocated from the file's own pool, we
+ * don't have to free it - freeing file+pool will free cache entry, too.
+ */
+
+ if ((error = git_attr_file__new(&file, NULL, &source)) < 0 ||
+ (error = git_attr_file__parse_buffer(NULL, file, content.ptr, true)) < 0 ||
+ (error = git_attr_cache__alloc_file_entry(&file->entry, NULL, NULL, path, &file->pool)) < 0)
+ goto out;
+
+ *out = file;
+out:
+ if (error < 0)
+ git_attr_file__free(file);
+ git_str_dispose(&content);
+
+ return error;
+}
+
+bool git_attr_fnmatch__match(
+ git_attr_fnmatch *match,
+ git_attr_path *path)
+{
+ const char *relpath = path->path;
+ const char *filename;
+ int flags = 0;
+
+ /*
+ * If the rule was generated in a subdirectory, we must only
+ * use it for paths inside that directory. We can thus return
+ * a non-match if the prefixes don't match.
+ */
+ if (match->containing_dir) {
+ if (match->flags & GIT_ATTR_FNMATCH_ICASE) {
+ if (git__strncasecmp(path->path, match->containing_dir, match->containing_dir_length))
+ return 0;
+ } else {
+ if (git__prefixcmp(path->path, match->containing_dir))
+ return 0;
+ }
+
+ relpath += match->containing_dir_length;
+ }
+
+ if (match->flags & GIT_ATTR_FNMATCH_ICASE)
+ flags |= WM_CASEFOLD;
+
+ if (match->flags & GIT_ATTR_FNMATCH_FULLPATH) {
+ filename = relpath;
+ flags |= WM_PATHNAME;
+ } else {
+ filename = path->basename;
+ }
+
+ if ((match->flags & GIT_ATTR_FNMATCH_DIRECTORY) && !path->is_dir) {
+ bool samename;
+
+ /*
+ * for attribute checks or checks at the root of this match's
+ * containing_dir (or root of the repository if no containing_dir),
+ * do not match.
+ */
+ if (!(match->flags & GIT_ATTR_FNMATCH_IGNORE) ||
+ path->basename == relpath)
+ return false;
+
+ /* fail match if this is a file with same name as ignored folder */
+ samename = (match->flags & GIT_ATTR_FNMATCH_ICASE) ?
+ !strcasecmp(match->pattern, relpath) :
+ !strcmp(match->pattern, relpath);
+
+ if (samename)
+ return false;
+
+ return (wildmatch(match->pattern, relpath, flags) == WM_MATCH);
+ }
+
+ return (wildmatch(match->pattern, filename, flags) == WM_MATCH);
+}
+
+bool git_attr_rule__match(
+ git_attr_rule *rule,
+ git_attr_path *path)
+{
+ bool matched = git_attr_fnmatch__match(&rule->match, path);
+
+ if (rule->match.flags & GIT_ATTR_FNMATCH_NEGATIVE)
+ matched = !matched;
+
+ return matched;
+}
+
+git_attr_assignment *git_attr_rule__lookup_assignment(
+ git_attr_rule *rule, const char *name)
+{
+ size_t pos;
+ git_attr_name key;
+ key.name = name;
+ key.name_hash = git_attr_file__name_hash(name);
+
+ if (git_vector_bsearch(&pos, &rule->assigns, &key))
+ return NULL;
+
+ return git_vector_get(&rule->assigns, pos);
+}
+
+int git_attr_path__init(
+ git_attr_path *info,
+ const char *path,
+ const char *base,
+ git_dir_flag dir_flag)
+{
+ ssize_t root;
+
+ /* build full path as best we can */
+ git_str_init(&info->full, 0);
+
+ if (git_fs_path_join_unrooted(&info->full, path, base, &root) < 0)
+ return -1;
+
+ info->path = info->full.ptr + root;
+
+ /* remove trailing slashes */
+ while (info->full.size > 0) {
+ if (info->full.ptr[info->full.size - 1] != '/')
+ break;
+ info->full.size--;
+ }
+ info->full.ptr[info->full.size] = '\0';
+
+ /* skip leading slashes in path */
+ while (*info->path == '/')
+ info->path++;
+
+ /* find trailing basename component */
+ info->basename = strrchr(info->path, '/');
+ if (info->basename)
+ info->basename++;
+ if (!info->basename || !*info->basename)
+ info->basename = info->path;
+
+ switch (dir_flag)
+ {
+ case GIT_DIR_FLAG_FALSE:
+ info->is_dir = 0;
+ break;
+
+ case GIT_DIR_FLAG_TRUE:
+ info->is_dir = 1;
+ break;
+
+ case GIT_DIR_FLAG_UNKNOWN:
+ default:
+ info->is_dir = (int)git_fs_path_isdir(info->full.ptr);
+ break;
+ }
+
+ return 0;
+}
+
+void git_attr_path__free(git_attr_path *info)
+{
+ git_str_dispose(&info->full);
+ info->path = NULL;
+ info->basename = NULL;
+}
+
+/*
+ * From gitattributes(5):
+ *
+ * Patterns have the following format:
+ *
+ * - A blank line matches no files, so it can serve as a separator for
+ * readability.
+ *
+ * - A line starting with # serves as a comment.
+ *
+ * - An optional prefix ! which negates the pattern; any matching file
+ * excluded by a previous pattern will become included again. If a negated
+ * pattern matches, this will override lower precedence patterns sources.
+ *
+ * - If the pattern ends with a slash, it is removed for the purpose of the
+ * following description, but it would only find a match with a directory. In
+ * other words, foo/ will match a directory foo and paths underneath it, but
+ * will not match a regular file or a symbolic link foo (this is consistent
+ * with the way how pathspec works in general in git).
+ *
+ * - If the pattern does not contain a slash /, git treats it as a shell glob
+ * pattern and checks for a match against the pathname without leading
+ * directories.
+ *
+ * - Otherwise, git treats the pattern as a shell glob suitable for consumption
+ * by fnmatch(3) with the FNM_PATHNAME flag: wildcards in the pattern will
+ * not match a / in the pathname. For example, "Documentation/\*.html" matches
+ * "Documentation/git.html" but not "Documentation/ppc/ppc.html". A leading
+ * slash matches the beginning of the pathname; for example, "/\*.c" matches
+ * "cat-file.c" but not "mozilla-sha1/sha1.c".
+ */
+
+/*
+ * Determine the length of trailing spaces. Escaped spaces do not count as
+ * trailing whitespace.
+ */
+static size_t trailing_space_length(const char *p, size_t len)
+{
+ size_t n, i;
+ for (n = len; n; n--) {
+ if (p[n-1] != ' ' && p[n-1] != '\t')
+ break;
+
+ /*
+ * Count escape-characters before space. In case where it's an
+ * even number of escape characters, then the escape char itself
+ * is escaped and the whitespace is an unescaped whitespace.
+ * Otherwise, the last escape char is not escaped and the
+ * whitespace in an escaped whitespace.
+ */
+ i = n;
+ while (i > 1 && p[i-2] == '\\')
+ i--;
+ if ((n - i) % 2)
+ break;
+ }
+ return len - n;
+}
+
+static size_t unescape_spaces(char *str)
+{
+ char *scan, *pos = str;
+ bool escaped = false;
+
+ if (!str)
+ return 0;
+
+ for (scan = str; *scan; scan++) {
+ if (!escaped && *scan == '\\') {
+ escaped = true;
+ continue;
+ }
+
+ /* Only insert the escape character for escaped non-spaces */
+ if (escaped && !git__isspace(*scan))
+ *pos++ = '\\';
+
+ *pos++ = *scan;
+ escaped = false;
+ }
+
+ if (pos != scan)
+ *pos = '\0';
+
+ return (pos - str);
+}
+
+/*
+ * This will return 0 if the spec was filled out,
+ * GIT_ENOTFOUND if the fnmatch does not require matching, or
+ * another error code there was an actual problem.
+ */
+int git_attr_fnmatch__parse(
+ git_attr_fnmatch *spec,
+ git_pool *pool,
+ const char *context,
+ const char **base)
+{
+ const char *pattern, *scan;
+ int slash_count, allow_space;
+ bool escaped;
+
+ GIT_ASSERT_ARG(spec);
+ GIT_ASSERT_ARG(base && *base);
+
+ if (parse_optimized_patterns(spec, pool, *base))
+ return 0;
+
+ spec->flags = (spec->flags & GIT_ATTR_FNMATCH__INCOMING);
+ allow_space = ((spec->flags & GIT_ATTR_FNMATCH_ALLOWSPACE) != 0);
+
+ pattern = *base;
+
+ while (!allow_space && git__isspace(*pattern))
+ pattern++;
+
+ if (!*pattern || *pattern == '#' || *pattern == '\n' ||
+ (*pattern == '\r' && *(pattern + 1) == '\n')) {
+ *base = git__next_line(pattern);
+ return GIT_ENOTFOUND;
+ }
+
+ if (*pattern == '[' && (spec->flags & GIT_ATTR_FNMATCH_ALLOWMACRO) != 0) {
+ if (strncmp(pattern, "[attr]", 6) == 0) {
+ spec->flags = spec->flags | GIT_ATTR_FNMATCH_MACRO;
+ pattern += 6;
+ }
+ /* else a character range like [a-e]* which is accepted */
+ }
+
+ if (*pattern == '!' && (spec->flags & GIT_ATTR_FNMATCH_ALLOWNEG) != 0) {
+ spec->flags = spec->flags | GIT_ATTR_FNMATCH_NEGATIVE;
+ pattern++;
+ }
+
+ slash_count = 0;
+ escaped = false;
+ /* Scan until a non-escaped whitespace. */
+ for (scan = pattern; *scan != '\0'; ++scan) {
+ char c = *scan;
+
+ if (c == '\\' && !escaped) {
+ escaped = true;
+ continue;
+ } else if (git__isspace(c) && !escaped) {
+ if (!allow_space || (c != ' ' && c != '\t' && c != '\r'))
+ break;
+ } else if (c == '/') {
+ spec->flags = spec->flags | GIT_ATTR_FNMATCH_FULLPATH;
+ slash_count++;
+
+ if (slash_count == 1 && pattern == scan)
+ pattern++;
+ } else if (git__iswildcard(c) && !escaped) {
+ /* remember if we see an unescaped wildcard in pattern */
+ spec->flags = spec->flags | GIT_ATTR_FNMATCH_HASWILD;
+ }
+
+ escaped = false;
+ }
+
+ *base = scan;
+
+ if ((spec->length = scan - pattern) == 0)
+ return GIT_ENOTFOUND;
+
+ /*
+ * Remove one trailing \r in case this is a CRLF delimited
+ * file, in the case of Icon\r\r\n, we still leave the first
+ * \r there to match against.
+ */
+ if (pattern[spec->length - 1] == '\r')
+ if (--spec->length == 0)
+ return GIT_ENOTFOUND;
+
+ /* Remove trailing spaces. */
+ spec->length -= trailing_space_length(pattern, spec->length);
+
+ if (spec->length == 0)
+ return GIT_ENOTFOUND;
+
+ if (pattern[spec->length - 1] == '/') {
+ spec->length--;
+ spec->flags = spec->flags | GIT_ATTR_FNMATCH_DIRECTORY;
+ if (--slash_count <= 0)
+ spec->flags = spec->flags & ~GIT_ATTR_FNMATCH_FULLPATH;
+ }
+
+ if (context) {
+ char *slash = strrchr(context, '/');
+ size_t len;
+ if (slash) {
+ /* include the slash for easier matching */
+ len = slash - context + 1;
+ spec->containing_dir = git_pool_strndup(pool, context, len);
+ spec->containing_dir_length = len;
+ }
+ }
+
+ spec->pattern = git_pool_strndup(pool, pattern, spec->length);
+
+ if (!spec->pattern) {
+ *base = git__next_line(pattern);
+ return -1;
+ } else {
+ /* strip '\' that might have been used for internal whitespace */
+ spec->length = unescape_spaces(spec->pattern);
+ }
+
+ return 0;
+}
+
+static bool parse_optimized_patterns(
+ git_attr_fnmatch *spec,
+ git_pool *pool,
+ const char *pattern)
+{
+ if (!pattern[1] && (pattern[0] == '*' || pattern[0] == '.')) {
+ spec->flags = GIT_ATTR_FNMATCH_MATCH_ALL;
+ spec->pattern = git_pool_strndup(pool, pattern, 1);
+ spec->length = 1;
+
+ return true;
+ }
+
+ return false;
+}
+
+static int sort_by_hash_and_name(const void *a_raw, const void *b_raw)
+{
+ const git_attr_name *a = a_raw;
+ const git_attr_name *b = b_raw;
+
+ if (b->name_hash < a->name_hash)
+ return 1;
+ else if (b->name_hash > a->name_hash)
+ return -1;
+ else
+ return strcmp(b->name, a->name);
+}
+
+static void git_attr_assignment__free(git_attr_assignment *assign)
+{
+ /* name and value are stored in a git_pool associated with the
+ * git_attr_file, so they do not need to be freed here
+ */
+ assign->name = NULL;
+ assign->value = NULL;
+ git__free(assign);
+}
+
+static int merge_assignments(void **old_raw, void *new_raw)
+{
+ git_attr_assignment **old = (git_attr_assignment **)old_raw;
+ git_attr_assignment *new = (git_attr_assignment *)new_raw;
+
+ GIT_REFCOUNT_DEC(*old, git_attr_assignment__free);
+ *old = new;
+ return GIT_EEXISTS;
+}
+
+int git_attr_assignment__parse(
+ git_repository *repo,
+ git_pool *pool,
+ git_vector *assigns,
+ const char **base)
+{
+ int error;
+ const char *scan = *base;
+ git_attr_assignment *assign = NULL;
+
+ GIT_ASSERT_ARG(assigns && !assigns->length);
+
+ git_vector_set_cmp(assigns, sort_by_hash_and_name);
+
+ while (*scan && *scan != '\n') {
+ const char *name_start, *value_start;
+
+ /* skip leading blanks */
+ while (git__isspace(*scan) && *scan != '\n') scan++;
+
+ /* allocate assign if needed */
+ if (!assign) {
+ assign = git__calloc(1, sizeof(git_attr_assignment));
+ GIT_ERROR_CHECK_ALLOC(assign);
+ GIT_REFCOUNT_INC(assign);
+ }
+
+ assign->name_hash = 5381;
+ assign->value = git_attr__true;
+
+ /* look for magic name prefixes */
+ if (*scan == '-') {
+ assign->value = git_attr__false;
+ scan++;
+ } else if (*scan == '!') {
+ assign->value = git_attr__unset; /* explicit unspecified state */
+ scan++;
+ } else if (*scan == '#') /* comment rest of line */
+ break;
+
+ /* find the name */
+ name_start = scan;
+ while (*scan && !git__isspace(*scan) && *scan != '=') {
+ assign->name_hash =
+ ((assign->name_hash << 5) + assign->name_hash) + *scan;
+ scan++;
+ }
+ if (scan == name_start) {
+ /* must have found lone prefix (" - ") or leading = ("=foo")
+ * or end of buffer -- advance until whitespace and continue
+ */
+ while (*scan && !git__isspace(*scan)) scan++;
+ continue;
+ }
+
+ /* allocate permanent storage for name */
+ assign->name = git_pool_strndup(pool, name_start, scan - name_start);
+ GIT_ERROR_CHECK_ALLOC(assign->name);
+
+ /* if there is an equals sign, find the value */
+ if (*scan == '=') {
+ for (value_start = ++scan; *scan && !git__isspace(*scan); ++scan);
+
+ /* if we found a value, allocate permanent storage for it */
+ if (scan > value_start) {
+ assign->value = git_pool_strndup(pool, value_start, scan - value_start);
+ GIT_ERROR_CHECK_ALLOC(assign->value);
+ }
+ }
+
+ /* expand macros (if given a repo with a macro cache) */
+ if (repo != NULL && assign->value == git_attr__true) {
+ git_attr_rule *macro =
+ git_attr_cache__lookup_macro(repo, assign->name);
+
+ if (macro != NULL) {
+ unsigned int i;
+ git_attr_assignment *massign;
+
+ git_vector_foreach(¯o->assigns, i, massign) {
+ GIT_REFCOUNT_INC(massign);
+
+ error = git_vector_insert_sorted(
+ assigns, massign, &merge_assignments);
+ if (error < 0 && error != GIT_EEXISTS) {
+ git_attr_assignment__free(assign);
+ return error;
+ }
+ }
+ }
+ }
+
+ /* insert allocated assign into vector */
+ error = git_vector_insert_sorted(assigns, assign, &merge_assignments);
+ if (error < 0 && error != GIT_EEXISTS)
+ return error;
+
+ /* clear assign since it is now "owned" by the vector */
+ assign = NULL;
+ }
+
+ if (assign != NULL)
+ git_attr_assignment__free(assign);
+
+ *base = git__next_line(scan);
+
+ return (assigns->length == 0) ? GIT_ENOTFOUND : 0;
+}
+
+static void git_attr_rule__clear(git_attr_rule *rule)
+{
+ unsigned int i;
+ git_attr_assignment *assign;
+
+ if (!rule)
+ return;
+
+ if (!(rule->match.flags & GIT_ATTR_FNMATCH_IGNORE)) {
+ git_vector_foreach(&rule->assigns, i, assign)
+ GIT_REFCOUNT_DEC(assign, git_attr_assignment__free);
+ git_vector_free(&rule->assigns);
+ }
+
+ /* match.pattern is stored in a git_pool, so no need to free */
+ rule->match.pattern = NULL;
+ rule->match.length = 0;
+}
+
+void git_attr_rule__free(git_attr_rule *rule)
+{
+ git_attr_rule__clear(rule);
+ git__free(rule);
+}
+
+int git_attr_session__init(git_attr_session *session, git_repository *repo)
+{
+ GIT_ASSERT_ARG(repo);
+
+ memset(session, 0, sizeof(*session));
+ session->key = git_atomic32_inc(&repo->attr_session_key);
+
+ return 0;
+}
+
+void git_attr_session__free(git_attr_session *session)
+{
+ if (!session)
+ return;
+
+ git_str_dispose(&session->sysdir);
+ git_str_dispose(&session->tmp);
+
+ memset(session, 0, sizeof(git_attr_session));
+}
projects / libgit2.git / blobdiff