| /* |
| * GIT - The information manager from hell |
| * |
| * Copyright (C) Linus Torvalds, 2005 |
| * Copyright (C) Johannes Schindelin, 2005 |
| * |
| */ |
| #include "cache.h" |
| #include "exec_cmd.h" |
| |
| #define MAXNAME (256) |
| |
| static FILE *config_file; |
| static const char *config_file_name; |
| static int config_linenr; |
| static int config_file_eof; |
| static int zlib_compression_seen; |
| |
| const char *config_exclusive_filename = NULL; |
| |
| static int get_next_char(void) |
| { |
| int c; |
| FILE *f; |
| |
| c = '\n'; |
| if ((f = config_file) != NULL) { |
| c = fgetc(f); |
| if (c == '\r') { |
| /* DOS like systems */ |
| c = fgetc(f); |
| if (c != '\n') { |
| ungetc(c, f); |
| c = '\r'; |
| } |
| } |
| if (c == '\n') |
| config_linenr++; |
| if (c == EOF) { |
| config_file_eof = 1; |
| c = '\n'; |
| } |
| } |
| return c; |
| } |
| |
| static char *parse_value(void) |
| { |
| static char value[1024]; |
| int quote = 0, comment = 0, len = 0, space = 0; |
| |
| for (;;) { |
| int c = get_next_char(); |
| if (len >= sizeof(value) - 1) |
| return NULL; |
| if (c == '\n') { |
| if (quote) |
| return NULL; |
| value[len] = 0; |
| return value; |
| } |
| if (comment) |
| continue; |
| if (isspace(c) && !quote) { |
| if (len) |
| space++; |
| continue; |
| } |
| if (!quote) { |
| if (c == ';' || c == '#') { |
| comment = 1; |
| continue; |
| } |
| } |
| for (; space; space--) |
| value[len++] = ' '; |
| if (c == '\\') { |
| c = get_next_char(); |
| switch (c) { |
| case '\n': |
| continue; |
| case 't': |
| c = '\t'; |
| break; |
| case 'b': |
| c = '\b'; |
| break; |
| case 'n': |
| c = '\n'; |
| break; |
| /* Some characters escape as themselves */ |
| case '\\': case '"': |
| break; |
| /* Reject unknown escape sequences */ |
| default: |
| return NULL; |
| } |
| value[len++] = c; |
| continue; |
| } |
| if (c == '"') { |
| quote = 1-quote; |
| continue; |
| } |
| value[len++] = c; |
| } |
| } |
| |
| static inline int iskeychar(int c) |
| { |
| return isalnum(c) || c == '-'; |
| } |
| |
| static int get_value(config_fn_t fn, void *data, char *name, unsigned int len) |
| { |
| int c; |
| char *value; |
| |
| /* Get the full name */ |
| for (;;) { |
| c = get_next_char(); |
| if (config_file_eof) |
| break; |
| if (!iskeychar(c)) |
| break; |
| name[len++] = tolower(c); |
| if (len >= MAXNAME) |
| return -1; |
| } |
| name[len] = 0; |
| while (c == ' ' || c == '\t') |
| c = get_next_char(); |
| |
| value = NULL; |
| if (c != '\n') { |
| if (c != '=') |
| return -1; |
| value = parse_value(); |
| if (!value) |
| return -1; |
| } |
| return fn(name, value, data); |
| } |
| |
| static int get_extended_base_var(char *name, int baselen, int c) |
| { |
| do { |
| if (c == '\n') |
| return -1; |
| c = get_next_char(); |
| } while (isspace(c)); |
| |
| /* We require the format to be '[base "extension"]' */ |
| if (c != '"') |
| return -1; |
| name[baselen++] = '.'; |
| |
| for (;;) { |
| int c = get_next_char(); |
| if (c == '\n') |
| return -1; |
| if (c == '"') |
| break; |
| if (c == '\\') { |
| c = get_next_char(); |
| if (c == '\n') |
| return -1; |
| } |
| name[baselen++] = c; |
| if (baselen > MAXNAME / 2) |
| return -1; |
| } |
| |
| /* Final ']' */ |
| if (get_next_char() != ']') |
| return -1; |
| return baselen; |
| } |
| |
| static int get_base_var(char *name) |
| { |
| int baselen = 0; |
| |
| for (;;) { |
| int c = get_next_char(); |
| if (config_file_eof) |
| return -1; |
| if (c == ']') |
| return baselen; |
| if (isspace(c)) |
| return get_extended_base_var(name, baselen, c); |
| if (!iskeychar(c) && c != '.') |
| return -1; |
| if (baselen > MAXNAME / 2) |
| return -1; |
| name[baselen++] = tolower(c); |
| } |
| } |
| |
| static int git_parse_file(config_fn_t fn, void *data) |
| { |
| int comment = 0; |
| int baselen = 0; |
| static char var[MAXNAME]; |
| |
| /* U+FEFF Byte Order Mark in UTF8 */ |
| static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf"; |
| const unsigned char *bomptr = utf8_bom; |
| |
| for (;;) { |
| int c = get_next_char(); |
| if (bomptr && *bomptr) { |
| /* We are at the file beginning; skip UTF8-encoded BOM |
| * if present. Sane editors won't put this in on their |
| * own, but e.g. Windows Notepad will do it happily. */ |
| if ((unsigned char) c == *bomptr) { |
| bomptr++; |
| continue; |
| } else { |
| /* Do not tolerate partial BOM. */ |
| if (bomptr != utf8_bom) |
| break; |
| /* No BOM at file beginning. Cool. */ |
| bomptr = NULL; |
| } |
| } |
| if (c == '\n') { |
| if (config_file_eof) |
| return 0; |
| comment = 0; |
| continue; |
| } |
| if (comment || isspace(c)) |
| continue; |
| if (c == '#' || c == ';') { |
| comment = 1; |
| continue; |
| } |
| if (c == '[') { |
| baselen = get_base_var(var); |
| if (baselen <= 0) |
| break; |
| var[baselen++] = '.'; |
| var[baselen] = 0; |
| continue; |
| } |
| if (!isalpha(c)) |
| break; |
| var[baselen] = tolower(c); |
| if (get_value(fn, data, var, baselen+1) < 0) |
| break; |
| } |
| die("bad config file line %d in %s", config_linenr, config_file_name); |
| } |
| |
| static int parse_unit_factor(const char *end, unsigned long *val) |
| { |
| if (!*end) |
| return 1; |
| else if (!strcasecmp(end, "k")) { |
| *val *= 1024; |
| return 1; |
| } |
| else if (!strcasecmp(end, "m")) { |
| *val *= 1024 * 1024; |
| return 1; |
| } |
| else if (!strcasecmp(end, "g")) { |
| *val *= 1024 * 1024 * 1024; |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int git_parse_long(const char *value, long *ret) |
| { |
| if (value && *value) { |
| char *end; |
| long val = strtol(value, &end, 0); |
| unsigned long factor = 1; |
| if (!parse_unit_factor(end, &factor)) |
| return 0; |
| *ret = val * factor; |
| return 1; |
| } |
| return 0; |
| } |
| |
| int git_parse_ulong(const char *value, unsigned long *ret) |
| { |
| if (value && *value) { |
| char *end; |
| unsigned long val = strtoul(value, &end, 0); |
| if (!parse_unit_factor(end, &val)) |
| return 0; |
| *ret = val; |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void die_bad_config(const char *name) |
| { |
| if (config_file_name) |
| die("bad config value for '%s' in %s", name, config_file_name); |
| die("bad config value for '%s'", name); |
| } |
| |
| int git_config_int(const char *name, const char *value) |
| { |
| long ret = 0; |
| if (!git_parse_long(value, &ret)) |
| die_bad_config(name); |
| return ret; |
| } |
| |
| unsigned long git_config_ulong(const char *name, const char *value) |
| { |
| unsigned long ret; |
| if (!git_parse_ulong(value, &ret)) |
| die_bad_config(name); |
| return ret; |
| } |
| |
| int git_config_bool_or_int(const char *name, const char *value, int *is_bool) |
| { |
| *is_bool = 1; |
| if (!value) |
| return 1; |
| if (!*value) |
| return 0; |
| if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on")) |
| return 1; |
| if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off")) |
| return 0; |
| *is_bool = 0; |
| return git_config_int(name, value); |
| } |
| |
| int git_config_bool(const char *name, const char *value) |
| { |
| int discard; |
| return !!git_config_bool_or_int(name, value, &discard); |
| } |
| |
| int git_config_string(const char **dest, const char *var, const char *value) |
| { |
| if (!value) |
| return config_error_nonbool(var); |
| *dest = xstrdup(value); |
| return 0; |
| } |
| |
| static int git_default_core_config(const char *var, const char *value) |
| { |
| /* This needs a better name */ |
| if (!strcmp(var, "core.filemode")) { |
| trust_executable_bit = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "core.trustctime")) { |
| trust_ctime = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.quotepath")) { |
| quote_path_fully = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.symlinks")) { |
| has_symlinks = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.ignorecase")) { |
| ignore_case = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.bare")) { |
| is_bare_repository_cfg = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.ignorestat")) { |
| assume_unchanged = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.prefersymlinkrefs")) { |
| prefer_symlink_refs = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.logallrefupdates")) { |
| log_all_ref_updates = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.warnambiguousrefs")) { |
| warn_ambiguous_refs = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.loosecompression")) { |
| int level = git_config_int(var, value); |
| if (level == -1) |
| level = Z_DEFAULT_COMPRESSION; |
| else if (level < 0 || level > Z_BEST_COMPRESSION) |
| die("bad zlib compression level %d", level); |
| zlib_compression_level = level; |
| zlib_compression_seen = 1; |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.compression")) { |
| int level = git_config_int(var, value); |
| if (level == -1) |
| level = Z_DEFAULT_COMPRESSION; |
| else if (level < 0 || level > Z_BEST_COMPRESSION) |
| die("bad zlib compression level %d", level); |
| core_compression_level = level; |
| core_compression_seen = 1; |
| if (!zlib_compression_seen) |
| zlib_compression_level = level; |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.packedgitwindowsize")) { |
| int pgsz_x2 = getpagesize() * 2; |
| packed_git_window_size = git_config_int(var, value); |
| |
| /* This value must be multiple of (pagesize * 2) */ |
| packed_git_window_size /= pgsz_x2; |
| if (packed_git_window_size < 1) |
| packed_git_window_size = 1; |
| packed_git_window_size *= pgsz_x2; |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.packedgitlimit")) { |
| packed_git_limit = git_config_int(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.deltabasecachelimit")) { |
| delta_base_cache_limit = git_config_int(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.autocrlf")) { |
| if (value && !strcasecmp(value, "input")) { |
| auto_crlf = -1; |
| return 0; |
| } |
| auto_crlf = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.safecrlf")) { |
| if (value && !strcasecmp(value, "warn")) { |
| safe_crlf = SAFE_CRLF_WARN; |
| return 0; |
| } |
| safe_crlf = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.pager")) |
| return git_config_string(&pager_program, var, value); |
| |
| if (!strcmp(var, "core.editor")) |
| return git_config_string(&editor_program, var, value); |
| |
| if (!strcmp(var, "core.excludesfile")) |
| return git_config_string(&excludes_file, var, value); |
| |
| if (!strcmp(var, "core.whitespace")) { |
| if (!value) |
| return config_error_nonbool(var); |
| whitespace_rule_cfg = parse_whitespace_rule(value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.fsyncobjectfiles")) { |
| fsync_object_files = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.preloadindex")) { |
| core_preload_index = git_config_bool(var, value); |
| return 0; |
| } |
| |
| if (!strcmp(var, "core.createobject")) { |
| if (!strcmp(value, "rename")) |
| object_creation_mode = OBJECT_CREATION_USES_RENAMES; |
| else if (!strcmp(value, "link")) |
| object_creation_mode = OBJECT_CREATION_USES_HARDLINKS; |
| else |
| die("Invalid mode for object creation: %s", value); |
| return 0; |
| } |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| static int git_default_user_config(const char *var, const char *value) |
| { |
| if (!strcmp(var, "user.name")) { |
| if (!value) |
| return config_error_nonbool(var); |
| strlcpy(git_default_name, value, sizeof(git_default_name)); |
| if (git_default_email[0]) |
| user_ident_explicitly_given = 1; |
| return 0; |
| } |
| |
| if (!strcmp(var, "user.email")) { |
| if (!value) |
| return config_error_nonbool(var); |
| strlcpy(git_default_email, value, sizeof(git_default_email)); |
| if (git_default_name[0]) |
| user_ident_explicitly_given = 1; |
| return 0; |
| } |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| static int git_default_i18n_config(const char *var, const char *value) |
| { |
| if (!strcmp(var, "i18n.commitencoding")) |
| return git_config_string(&git_commit_encoding, var, value); |
| |
| if (!strcmp(var, "i18n.logoutputencoding")) |
| return git_config_string(&git_log_output_encoding, var, value); |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| static int git_default_branch_config(const char *var, const char *value) |
| { |
| if (!strcmp(var, "branch.autosetupmerge")) { |
| if (value && !strcasecmp(value, "always")) { |
| git_branch_track = BRANCH_TRACK_ALWAYS; |
| return 0; |
| } |
| git_branch_track = git_config_bool(var, value); |
| return 0; |
| } |
| if (!strcmp(var, "branch.autosetuprebase")) { |
| if (!value) |
| return config_error_nonbool(var); |
| else if (!strcmp(value, "never")) |
| autorebase = AUTOREBASE_NEVER; |
| else if (!strcmp(value, "local")) |
| autorebase = AUTOREBASE_LOCAL; |
| else if (!strcmp(value, "remote")) |
| autorebase = AUTOREBASE_REMOTE; |
| else if (!strcmp(value, "always")) |
| autorebase = AUTOREBASE_ALWAYS; |
| else |
| return error("Malformed value for %s", var); |
| return 0; |
| } |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| static int git_default_push_config(const char *var, const char *value) |
| { |
| if (!strcmp(var, "push.default")) { |
| if (!value) |
| return config_error_nonbool(var); |
| else if (!strcmp(value, "nothing")) |
| push_default = PUSH_DEFAULT_NOTHING; |
| else if (!strcmp(value, "matching")) |
| push_default = PUSH_DEFAULT_MATCHING; |
| else if (!strcmp(value, "tracking")) |
| push_default = PUSH_DEFAULT_TRACKING; |
| else if (!strcmp(value, "current")) |
| push_default = PUSH_DEFAULT_CURRENT; |
| else { |
| error("Malformed value for %s: %s", var, value); |
| return error("Must be one of nothing, matching, " |
| "tracking or current."); |
| } |
| return 0; |
| } |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| static int git_default_mailmap_config(const char *var, const char *value) |
| { |
| if (!strcmp(var, "mailmap.file")) |
| return git_config_string(&git_mailmap_file, var, value); |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| int git_default_config(const char *var, const char *value, void *dummy) |
| { |
| if (!prefixcmp(var, "core.")) |
| return git_default_core_config(var, value); |
| |
| if (!prefixcmp(var, "user.")) |
| return git_default_user_config(var, value); |
| |
| if (!prefixcmp(var, "i18n.")) |
| return git_default_i18n_config(var, value); |
| |
| if (!prefixcmp(var, "branch.")) |
| return git_default_branch_config(var, value); |
| |
| if (!prefixcmp(var, "push.")) |
| return git_default_push_config(var, value); |
| |
| if (!prefixcmp(var, "mailmap.")) |
| return git_default_mailmap_config(var, value); |
| |
| if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { |
| pager_use_color = git_config_bool(var,value); |
| return 0; |
| } |
| |
| /* Add other config variables here and to Documentation/config.txt. */ |
| return 0; |
| } |
| |
| int git_config_from_file(config_fn_t fn, const char *filename, void *data) |
| { |
| int ret; |
| FILE *f = fopen(filename, "r"); |
| |
| ret = -1; |
| if (f) { |
| config_file = f; |
| config_file_name = filename; |
| config_linenr = 1; |
| config_file_eof = 0; |
| ret = git_parse_file(fn, data); |
| fclose(f); |
| config_file_name = NULL; |
| } |
| return ret; |
| } |
| |
| const char *git_etc_gitconfig(void) |
| { |
| static const char *system_wide; |
| if (!system_wide) |
| system_wide = system_path(ETC_GITCONFIG); |
| return system_wide; |
| } |
| |
| static int git_env_bool(const char *k, int def) |
| { |
| const char *v = getenv(k); |
| return v ? git_config_bool(k, v) : def; |
| } |
| |
| int git_config_system(void) |
| { |
| return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0); |
| } |
| |
| int git_config_global(void) |
| { |
| return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0); |
| } |
| |
| int git_config(config_fn_t fn, void *data) |
| { |
| int ret = 0, found = 0; |
| char *repo_config = NULL; |
| const char *home = NULL; |
| |
| /* Setting $GIT_CONFIG makes git read _only_ the given config file. */ |
| if (config_exclusive_filename) |
| return git_config_from_file(fn, config_exclusive_filename, data); |
| if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) { |
| ret += git_config_from_file(fn, git_etc_gitconfig(), |
| data); |
| found += 1; |
| } |
| |
| home = getenv("HOME"); |
| if (git_config_global() && home) { |
| char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); |
| if (!access(user_config, R_OK)) { |
| ret += git_config_from_file(fn, user_config, data); |
| found += 1; |
| } |
| free(user_config); |
| } |
| |
| repo_config = git_pathdup("config"); |
| if (!access(repo_config, R_OK)) { |
| ret += git_config_from_file(fn, repo_config, data); |
| found += 1; |
| } |
| free(repo_config); |
| if (found == 0) |
| return -1; |
| return ret; |
| } |
| |
| /* |
| * Find all the stuff for git_config_set() below. |
| */ |
| |
| #define MAX_MATCHES 512 |
| |
| static struct { |
| int baselen; |
| char *key; |
| int do_not_match; |
| regex_t *value_regex; |
| int multi_replace; |
| size_t offset[MAX_MATCHES]; |
| enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
| int seen; |
| } store; |
| |
| static int matches(const char *key, const char *value) |
| { |
| return !strcmp(key, store.key) && |
| (store.value_regex == NULL || |
| (store.do_not_match ^ |
| !regexec(store.value_regex, value, 0, NULL, 0))); |
| } |
| |
| static int store_aux(const char *key, const char *value, void *cb) |
| { |
| const char *ep; |
| size_t section_len; |
| |
| switch (store.state) { |
| case KEY_SEEN: |
| if (matches(key, value)) { |
| if (store.seen == 1 && store.multi_replace == 0) { |
| warning("%s has multiple values", key); |
| } else if (store.seen >= MAX_MATCHES) { |
| error("too many matches for %s", key); |
| return 1; |
| } |
| |
| store.offset[store.seen] = ftell(config_file); |
| store.seen++; |
| } |
| break; |
| case SECTION_SEEN: |
| /* |
| * What we are looking for is in store.key (both |
| * section and var), and its section part is baselen |
| * long. We found key (again, both section and var). |
| * We would want to know if this key is in the same |
| * section as what we are looking for. We already |
| * know we are in the same section as what should |
| * hold store.key. |
| */ |
| ep = strrchr(key, '.'); |
| section_len = ep - key; |
| |
| if ((section_len != store.baselen) || |
| memcmp(key, store.key, section_len+1)) { |
| store.state = SECTION_END_SEEN; |
| break; |
| } |
| |
| /* |
| * Do not increment matches: this is no match, but we |
| * just made sure we are in the desired section. |
| */ |
| store.offset[store.seen] = ftell(config_file); |
| /* fallthru */ |
| case SECTION_END_SEEN: |
| case START: |
| if (matches(key, value)) { |
| store.offset[store.seen] = ftell(config_file); |
| store.state = KEY_SEEN; |
| store.seen++; |
| } else { |
| if (strrchr(key, '.') - key == store.baselen && |
| !strncmp(key, store.key, store.baselen)) { |
| store.state = SECTION_SEEN; |
| store.offset[store.seen] = ftell(config_file); |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static int write_error(const char *filename) |
| { |
| error("failed to write new configuration file %s", filename); |
| |
| /* Same error code as "failed to rename". */ |
| return 4; |
| } |
| |
| static int store_write_section(int fd, const char *key) |
| { |
| const char *dot; |
| int i, success; |
| struct strbuf sb = STRBUF_INIT; |
| |
| dot = memchr(key, '.', store.baselen); |
| if (dot) { |
| strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key); |
| for (i = dot - key + 1; i < store.baselen; i++) { |
| if (key[i] == '"' || key[i] == '\\') |
| strbuf_addch(&sb, '\\'); |
| strbuf_addch(&sb, key[i]); |
| } |
| strbuf_addstr(&sb, "\"]\n"); |
| } else { |
| strbuf_addf(&sb, "[%.*s]\n", store.baselen, key); |
| } |
| |
| success = write_in_full(fd, sb.buf, sb.len) == sb.len; |
| strbuf_release(&sb); |
| |
| return success; |
| } |
| |
| static int store_write_pair(int fd, const char *key, const char *value) |
| { |
| int i, success; |
| int length = strlen(key + store.baselen + 1); |
| const char *quote = ""; |
| struct strbuf sb = STRBUF_INIT; |
| |
| /* |
| * Check to see if the value needs to be surrounded with a dq pair. |
| * Note that problematic characters are always backslash-quoted; this |
| * check is about not losing leading or trailing SP and strings that |
| * follow beginning-of-comment characters (i.e. ';' and '#') by the |
| * configuration parser. |
| */ |
| if (value[0] == ' ') |
| quote = "\""; |
| for (i = 0; value[i]; i++) |
| if (value[i] == ';' || value[i] == '#') |
| quote = "\""; |
| if (i && value[i - 1] == ' ') |
| quote = "\""; |
| |
| strbuf_addf(&sb, "\t%.*s = %s", |
| length, key + store.baselen + 1, quote); |
| |
| for (i = 0; value[i]; i++) |
| switch (value[i]) { |
| case '\n': |
| strbuf_addstr(&sb, "\\n"); |
| break; |
| case '\t': |
| strbuf_addstr(&sb, "\\t"); |
| break; |
| case '"': |
| case '\\': |
| strbuf_addch(&sb, '\\'); |
| default: |
| strbuf_addch(&sb, value[i]); |
| break; |
| } |
| strbuf_addf(&sb, "%s\n", quote); |
| |
| success = write_in_full(fd, sb.buf, sb.len) == sb.len; |
| strbuf_release(&sb); |
| |
| return success; |
| } |
| |
| static ssize_t find_beginning_of_line(const char *contents, size_t size, |
| size_t offset_, int *found_bracket) |
| { |
| size_t equal_offset = size, bracket_offset = size; |
| ssize_t offset; |
| |
| contline: |
| for (offset = offset_-2; offset > 0 |
| && contents[offset] != '\n'; offset--) |
| switch (contents[offset]) { |
| case '=': equal_offset = offset; break; |
| case ']': bracket_offset = offset; break; |
| } |
| if (offset > 0 && contents[offset-1] == '\\') { |
| offset_ = offset; |
| goto contline; |
| } |
| if (bracket_offset < equal_offset) { |
| *found_bracket = 1; |
| offset = bracket_offset+1; |
| } else |
| offset++; |
| |
| return offset; |
| } |
| |
| int git_config_set(const char *key, const char *value) |
| { |
| return git_config_set_multivar(key, value, NULL, 0); |
| } |
| |
| /* |
| * If value==NULL, unset in (remove from) config, |
| * if value_regex!=NULL, disregard key/value pairs where value does not match. |
| * if multi_replace==0, nothing, or only one matching key/value is replaced, |
| * else all matching key/values (regardless how many) are removed, |
| * before the new pair is written. |
| * |
| * Returns 0 on success. |
| * |
| * This function does this: |
| * |
| * - it locks the config file by creating ".git/config.lock" |
| * |
| * - it then parses the config using store_aux() as validator to find |
| * the position on the key/value pair to replace. If it is to be unset, |
| * it must be found exactly once. |
| * |
| * - the config file is mmap()ed and the part before the match (if any) is |
| * written to the lock file, then the changed part and the rest. |
| * |
| * - the config file is removed and the lock file rename()d to it. |
| * |
| */ |
| int git_config_set_multivar(const char *key, const char *value, |
| const char *value_regex, int multi_replace) |
| { |
| int i, dot; |
| int fd = -1, in_fd; |
| int ret; |
| char *config_filename; |
| struct lock_file *lock = NULL; |
| const char *last_dot = strrchr(key, '.'); |
| |
| if (config_exclusive_filename) |
| config_filename = xstrdup(config_exclusive_filename); |
| else |
| config_filename = git_pathdup("config"); |
| |
| /* |
| * Since "key" actually contains the section name and the real |
| * key name separated by a dot, we have to know where the dot is. |
| */ |
| |
| if (last_dot == NULL) { |
| error("key does not contain a section: %s", key); |
| ret = 2; |
| goto out_free; |
| } |
| store.baselen = last_dot - key; |
| |
| store.multi_replace = multi_replace; |
| |
| /* |
| * Validate the key and while at it, lower case it for matching. |
| */ |
| store.key = xmalloc(strlen(key) + 1); |
| dot = 0; |
| for (i = 0; key[i]; i++) { |
| unsigned char c = key[i]; |
| if (c == '.') |
| dot = 1; |
| /* Leave the extended basename untouched.. */ |
| if (!dot || i > store.baselen) { |
| if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { |
| error("invalid key: %s", key); |
| free(store.key); |
| ret = 1; |
| goto out_free; |
| } |
| c = tolower(c); |
| } else if (c == '\n') { |
| error("invalid key (newline): %s", key); |
| free(store.key); |
| ret = 1; |
| goto out_free; |
| } |
| store.key[i] = c; |
| } |
| store.key[i] = 0; |
| |
| /* |
| * The lock serves a purpose in addition to locking: the new |
| * contents of .git/config will be written into it. |
| */ |
| lock = xcalloc(sizeof(struct lock_file), 1); |
| fd = hold_lock_file_for_update(lock, config_filename, 0); |
| if (fd < 0) { |
| error("could not lock config file %s: %s", config_filename, strerror(errno)); |
| free(store.key); |
| ret = -1; |
| goto out_free; |
| } |
| |
| /* |
| * If .git/config does not exist yet, write a minimal version. |
| */ |
| in_fd = open(config_filename, O_RDONLY); |
| if ( in_fd < 0 ) { |
| free(store.key); |
| |
| if ( ENOENT != errno ) { |
| error("opening %s: %s", config_filename, |
| strerror(errno)); |
| ret = 3; /* same as "invalid config file" */ |
| goto out_free; |
| } |
| /* if nothing to unset, error out */ |
| if (value == NULL) { |
| ret = 5; |
| goto out_free; |
| } |
| |
| store.key = (char *)key; |
| if (!store_write_section(fd, key) || |
| !store_write_pair(fd, key, value)) |
| goto write_err_out; |
| } else { |
| struct stat st; |
| char *contents; |
| size_t contents_sz, copy_begin, copy_end; |
| int i, new_line = 0; |
| |
| if (value_regex == NULL) |
| store.value_regex = NULL; |
| else { |
| if (value_regex[0] == '!') { |
| store.do_not_match = 1; |
| value_regex++; |
| } else |
| store.do_not_match = 0; |
| |
| store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); |
| if (regcomp(store.value_regex, value_regex, |
| REG_EXTENDED)) { |
| error("invalid pattern: %s", value_regex); |
| free(store.value_regex); |
| ret = 6; |
| goto out_free; |
| } |
| } |
| |
| store.offset[0] = 0; |
| store.state = START; |
| store.seen = 0; |
| |
| /* |
| * After this, store.offset will contain the *end* offset |
| * of the last match, or remain at 0 if no match was found. |
| * As a side effect, we make sure to transform only a valid |
| * existing config file. |
| */ |
| if (git_config_from_file(store_aux, config_filename, NULL)) { |
| error("invalid config file %s", config_filename); |
| free(store.key); |
| if (store.value_regex != NULL) { |
| regfree(store.value_regex); |
| free(store.value_regex); |
| } |
| ret = 3; |
| goto out_free; |
| } |
| |
| free(store.key); |
| if (store.value_regex != NULL) { |
| regfree(store.value_regex); |
| free(store.value_regex); |
| } |
| |
| /* if nothing to unset, or too many matches, error out */ |
| if ((store.seen == 0 && value == NULL) || |
| (store.seen > 1 && multi_replace == 0)) { |
| ret = 5; |
| goto out_free; |
| } |
| |
| fstat(in_fd, &st); |
| contents_sz = xsize_t(st.st_size); |
| contents = xmmap(NULL, contents_sz, PROT_READ, |
| MAP_PRIVATE, in_fd, 0); |
| close(in_fd); |
| |
| if (store.seen == 0) |
| store.seen = 1; |
| |
| for (i = 0, copy_begin = 0; i < store.seen; i++) { |
| if (store.offset[i] == 0) { |
| store.offset[i] = copy_end = contents_sz; |
| } else if (store.state != KEY_SEEN) { |
| copy_end = store.offset[i]; |
| } else |
| copy_end = find_beginning_of_line( |
| contents, contents_sz, |
| store.offset[i]-2, &new_line); |
| |
| if (copy_end > 0 && contents[copy_end-1] != '\n') |
| new_line = 1; |
| |
| /* write the first part of the config */ |
| if (copy_end > copy_begin) { |
| if (write_in_full(fd, contents + copy_begin, |
| copy_end - copy_begin) < |
| copy_end - copy_begin) |
| goto write_err_out; |
| if (new_line && |
| write_in_full(fd, "\n", 1) != 1) |
| goto write_err_out; |
| } |
| copy_begin = store.offset[i]; |
| } |
| |
| /* write the pair (value == NULL means unset) */ |
| if (value != NULL) { |
| if (store.state == START) { |
| if (!store_write_section(fd, key)) |
| goto write_err_out; |
| } |
| if (!store_write_pair(fd, key, value)) |
| goto write_err_out; |
| } |
| |
| /* write the rest of the config */ |
| if (copy_begin < contents_sz) |
| if (write_in_full(fd, contents + copy_begin, |
| contents_sz - copy_begin) < |
| contents_sz - copy_begin) |
| goto write_err_out; |
| |
| munmap(contents, contents_sz); |
| } |
| |
| if (commit_lock_file(lock) < 0) { |
| error("could not commit config file %s", config_filename); |
| ret = 4; |
| goto out_free; |
| } |
| |
| /* |
| * lock is committed, so don't try to roll it back below. |
| * NOTE: Since lockfile.c keeps a linked list of all created |
| * lock_file structures, it isn't safe to free(lock). It's |
| * better to just leave it hanging around. |
| */ |
| lock = NULL; |
| ret = 0; |
| |
| out_free: |
| if (lock) |
| rollback_lock_file(lock); |
| free(config_filename); |
| return ret; |
| |
| write_err_out: |
| ret = write_error(lock->filename); |
| goto out_free; |
| |
| } |
| |
| static int section_name_match (const char *buf, const char *name) |
| { |
| int i = 0, j = 0, dot = 0; |
| if (buf[i] != '[') |
| return 0; |
| for (i = 1; buf[i] && buf[i] != ']'; i++) { |
| if (!dot && isspace(buf[i])) { |
| dot = 1; |
| if (name[j++] != '.') |
| break; |
| for (i++; isspace(buf[i]); i++) |
| ; /* do nothing */ |
| if (buf[i] != '"') |
| break; |
| continue; |
| } |
| if (buf[i] == '\\' && dot) |
| i++; |
| else if (buf[i] == '"' && dot) { |
| for (i++; isspace(buf[i]); i++) |
| ; /* do_nothing */ |
| break; |
| } |
| if (buf[i] != name[j++]) |
| break; |
| } |
| if (buf[i] == ']' && name[j] == 0) { |
| /* |
| * We match, now just find the right length offset by |
| * gobbling up any whitespace after it, as well |
| */ |
| i++; |
| for (; buf[i] && isspace(buf[i]); i++) |
| ; /* do nothing */ |
| return i; |
| } |
| return 0; |
| } |
| |
| /* if new_name == NULL, the section is removed instead */ |
| int git_config_rename_section(const char *old_name, const char *new_name) |
| { |
| int ret = 0, remove = 0; |
| char *config_filename; |
| struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); |
| int out_fd; |
| char buf[1024]; |
| |
| if (config_exclusive_filename) |
| config_filename = xstrdup(config_exclusive_filename); |
| else |
| config_filename = git_pathdup("config"); |
| out_fd = hold_lock_file_for_update(lock, config_filename, 0); |
| if (out_fd < 0) { |
| ret = error("could not lock config file %s", config_filename); |
| goto out; |
| } |
| |
| if (!(config_file = fopen(config_filename, "rb"))) { |
| /* no config file means nothing to rename, no error */ |
| goto unlock_and_out; |
| } |
| |
| while (fgets(buf, sizeof(buf), config_file)) { |
| int i; |
| int length; |
| char *output = buf; |
| for (i = 0; buf[i] && isspace(buf[i]); i++) |
| ; /* do nothing */ |
| if (buf[i] == '[') { |
| /* it's a section */ |
| int offset = section_name_match(&buf[i], old_name); |
| if (offset > 0) { |
| ret++; |
| if (new_name == NULL) { |
| remove = 1; |
| continue; |
| } |
| store.baselen = strlen(new_name); |
| if (!store_write_section(out_fd, new_name)) { |
| ret = write_error(lock->filename); |
| goto out; |
| } |
| /* |
| * We wrote out the new section, with |
| * a newline, now skip the old |
| * section's length |
| */ |
| output += offset + i; |
| if (strlen(output) > 0) { |
| /* |
| * More content means there's |
| * a declaration to put on the |
| * next line; indent with a |
| * tab |
| */ |
| output -= 1; |
| output[0] = '\t'; |
| } |
| } |
| remove = 0; |
| } |
| if (remove) |
| continue; |
| length = strlen(output); |
| if (write_in_full(out_fd, output, length) != length) { |
| ret = write_error(lock->filename); |
| goto out; |
| } |
| } |
| fclose(config_file); |
| unlock_and_out: |
| if (commit_lock_file(lock) < 0) |
| ret = error("could not commit config file %s", config_filename); |
| out: |
| free(config_filename); |
| return ret; |
| } |
| |
| /* |
| * Call this to report error for your variable that should not |
| * get a boolean value (i.e. "[my] var" means "true"). |
| */ |
| int config_error_nonbool(const char *var) |
| { |
| return error("Missing value for '%s'", var); |
| } |