diff options
Diffstat (limited to 'config.c')
-rw-r--r-- | config.c | 1815 |
1 files changed, 1544 insertions, 271 deletions
@@ -6,63 +6,311 @@ * */ #include "cache.h" +#include "lockfile.h" #include "exec_cmd.h" +#include "strbuf.h" +#include "quote.h" +#include "hashmap.h" +#include "string-list.h" +#include "utf8.h" + +struct config_source { + struct config_source *prev; + union { + FILE *file; + struct config_buf { + const char *buf; + size_t len; + size_t pos; + } buf; + } u; + enum config_origin_type origin_type; + const char *name; + const char *path; + int die_on_error; + int linenr; + int eof; + struct strbuf value; + struct strbuf var; + + int (*do_fgetc)(struct config_source *c); + int (*do_ungetc)(int c, struct config_source *conf); + long (*do_ftell)(struct config_source *c); +}; -#define MAXNAME (256) +/* + * These variables record the "current" config source, which + * can be accessed by parsing callbacks. + * + * The "cf" variable will be non-NULL only when we are actually parsing a real + * config source (file, blob, cmdline, etc). + * + * The "current_config_kvi" variable will be non-NULL only when we are feeding + * cached config from a configset into a callback. + * + * They should generally never be non-NULL at the same time. If they are both + * NULL, then we aren't parsing anything (and depending on the function looking + * at the variables, it's either a bug for it to be called in the first place, + * or it's a function which can be reused for non-config purposes, and should + * fall back to some sane behavior). + */ +static struct config_source *cf; +static struct key_value_info *current_config_kvi; + +/* + * Similar to the variables above, this gives access to the "scope" of the + * current value (repo, global, etc). For cached values, it can be found via + * the current_config_kvi as above. During parsing, the current value can be + * found in this variable. It's not part of "cf" because it transcends a single + * file (i.e., a file included from .git/config is still in "repo" scope). + */ +static enum config_scope current_parsing_scope; -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; +/* + * Default config_set that contains key-value pairs from the usual set of config + * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG + * config file and the global /etc/gitconfig) + */ +static struct config_set the_config_set; -static int get_next_char(void) +static int config_file_fgetc(struct config_source *conf) { - int c; - FILE *f; + return getc_unlocked(conf->u.file); +} - 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'; - } +static int config_file_ungetc(int c, struct config_source *conf) +{ + return ungetc(c, conf->u.file); +} + +static long config_file_ftell(struct config_source *conf) +{ + return ftell(conf->u.file); +} + + +static int config_buf_fgetc(struct config_source *conf) +{ + if (conf->u.buf.pos < conf->u.buf.len) + return conf->u.buf.buf[conf->u.buf.pos++]; + + return EOF; +} + +static int config_buf_ungetc(int c, struct config_source *conf) +{ + if (conf->u.buf.pos > 0) { + conf->u.buf.pos--; + if (conf->u.buf.buf[conf->u.buf.pos] != c) + die("BUG: config_buf can only ungetc the same character"); + return c; + } + + return EOF; +} + +static long config_buf_ftell(struct config_source *conf) +{ + return conf->u.buf.pos; +} + +#define MAX_INCLUDE_DEPTH 10 +static const char include_depth_advice[] = +"exceeded maximum include depth (%d) while including\n" +" %s\n" +"from\n" +" %s\n" +"Do you have circular includes?"; +static int handle_path_include(const char *path, struct config_include_data *inc) +{ + int ret = 0; + struct strbuf buf = STRBUF_INIT; + char *expanded; + + if (!path) + return config_error_nonbool("include.path"); + + expanded = expand_user_path(path); + if (!expanded) + return error("could not expand include path '%s'", path); + path = expanded; + + /* + * Use an absolute path as-is, but interpret relative paths + * based on the including config file. + */ + if (!is_absolute_path(path)) { + char *slash; + + if (!cf || !cf->path) + return error("relative config includes must come from files"); + + slash = find_last_dir_sep(cf->path); + if (slash) + strbuf_add(&buf, cf->path, slash - cf->path + 1); + strbuf_addstr(&buf, path); + path = buf.buf; + } + + if (!access_or_die(path, R_OK, 0)) { + if (++inc->depth > MAX_INCLUDE_DEPTH) + die(include_depth_advice, MAX_INCLUDE_DEPTH, path, + !cf ? "<unknown>" : + cf->name ? cf->name : + "the command line"); + ret = git_config_from_file(git_config_include, path, inc); + inc->depth--; + } + strbuf_release(&buf); + free(expanded); + return ret; +} + +int git_config_include(const char *var, const char *value, void *data) +{ + struct config_include_data *inc = data; + int ret; + + /* + * Pass along all values, including "include" directives; this makes it + * possible to query information on the includes themselves. + */ + ret = inc->fn(var, value, inc->data); + if (ret < 0) + return ret; + + if (!strcmp(var, "include.path")) + ret = handle_path_include(value, inc); + return ret; +} + +void git_config_push_parameter(const char *text) +{ + struct strbuf env = STRBUF_INIT; + const char *old = getenv(CONFIG_DATA_ENVIRONMENT); + if (old && *old) { + strbuf_addstr(&env, old); + strbuf_addch(&env, ' '); + } + sq_quote_buf(&env, text); + setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1); + strbuf_release(&env); +} + +int git_config_parse_parameter(const char *text, + config_fn_t fn, void *data) +{ + const char *value; + struct strbuf **pair; + + pair = strbuf_split_str(text, '=', 2); + if (!pair[0]) + return error("bogus config parameter: %s", text); + + if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') { + strbuf_setlen(pair[0], pair[0]->len - 1); + value = pair[1] ? pair[1]->buf : ""; + } else { + value = NULL; + } + + strbuf_trim(pair[0]); + if (!pair[0]->len) { + strbuf_list_free(pair); + return error("bogus config parameter: %s", text); + } + strbuf_tolower(pair[0]); + if (fn(pair[0]->buf, value, data) < 0) { + strbuf_list_free(pair); + return -1; + } + strbuf_list_free(pair); + return 0; +} + +int git_config_from_parameters(config_fn_t fn, void *data) +{ + const char *env = getenv(CONFIG_DATA_ENVIRONMENT); + int ret = 0; + char *envw; + const char **argv = NULL; + int nr = 0, alloc = 0; + int i; + struct config_source source; + + if (!env) + return 0; + + memset(&source, 0, sizeof(source)); + source.prev = cf; + source.origin_type = CONFIG_ORIGIN_CMDLINE; + cf = &source; + + /* sq_dequote will write over it */ + envw = xstrdup(env); + + if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) { + ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT); + goto out; + } + + for (i = 0; i < nr; i++) { + if (git_config_parse_parameter(argv[i], fn, data) < 0) { + ret = -1; + goto out; } - if (c == '\n') - config_linenr++; - if (c == EOF) { - config_file_eof = 1; - c = '\n'; + } + +out: + free(argv); + free(envw); + cf = source.prev; + return ret; +} + +static int get_next_char(void) +{ + int c = cf->do_fgetc(cf); + + if (c == '\r') { + /* DOS like systems */ + c = cf->do_fgetc(cf); + if (c != '\n') { + if (c != EOF) + cf->do_ungetc(c, cf); + c = '\r'; } } + if (c == '\n') + cf->linenr++; + if (c == EOF) { + cf->eof = 1; + cf->linenr++; + c = '\n'; + } return c; } static char *parse_value(void) { - static char value[1024]; - int quote = 0, comment = 0, len = 0, space = 0; + int quote = 0, comment = 0, space = 0; + strbuf_reset(&cf->value); for (;;) { int c = get_next_char(); - if (len >= sizeof(value) - 1) - return NULL; if (c == '\n') { - if (quote) + if (quote) { + cf->linenr--; return NULL; - value[len] = 0; - return value; + } + return cf->value.buf; } if (comment) continue; if (isspace(c) && !quote) { - if (len) + if (cf->value.len) space++; continue; } @@ -73,7 +321,7 @@ static char *parse_value(void) } } for (; space; space--) - value[len++] = ' '; + strbuf_addch(&cf->value, ' '); if (c == '\\') { c = get_next_char(); switch (c) { @@ -95,14 +343,14 @@ static char *parse_value(void) default: return NULL; } - value[len++] = c; + strbuf_addch(&cf->value, c); continue; } if (c == '"') { quote = 1-quote; continue; } - value[len++] = c; + strbuf_addch(&cf->value, c); } } @@ -111,23 +359,22 @@ 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) +static int get_value(config_fn_t fn, void *data, struct strbuf *name) { int c; char *value; + int ret; /* Get the full name */ for (;;) { c = get_next_char(); - if (config_file_eof) + if (cf->eof) break; if (!iskeychar(c)) break; - name[len++] = tolower(c); - if (len >= MAXNAME) - return -1; + strbuf_addch(name, tolower(c)); } - name[len] = 0; + while (c == ' ' || c == '\t') c = get_next_char(); @@ -139,73 +386,79 @@ static int get_value(config_fn_t fn, void *data, char *name, unsigned int len) if (!value) return -1; } - return fn(name, value, data); + /* + * We already consumed the \n, but we need linenr to point to + * the line we just parsed during the call to fn to get + * accurate line number in error messages. + */ + cf->linenr--; + ret = fn(name->buf, value, data); + cf->linenr++; + return ret; } -static int get_extended_base_var(char *name, int baselen, int c) +static int get_extended_base_var(struct strbuf *name, int c) { do { if (c == '\n') - return -1; + goto error_incomplete_line; c = get_next_char(); } while (isspace(c)); /* We require the format to be '[base "extension"]' */ if (c != '"') return -1; - name[baselen++] = '.'; + strbuf_addch(name, '.'); for (;;) { int c = get_next_char(); if (c == '\n') - return -1; + goto error_incomplete_line; if (c == '"') break; if (c == '\\') { c = get_next_char(); if (c == '\n') - return -1; + goto error_incomplete_line; } - name[baselen++] = c; - if (baselen > MAXNAME / 2) - return -1; + strbuf_addch(name, c); } /* Final ']' */ if (get_next_char() != ']') return -1; - return baselen; + return 0; +error_incomplete_line: + cf->linenr--; + return -1; } -static int get_base_var(char *name) +static int get_base_var(struct strbuf *name) { - int baselen = 0; - for (;;) { int c = get_next_char(); - if (config_file_eof) + if (cf->eof) return -1; if (c == ']') - return baselen; + return 0; if (isspace(c)) - return get_extended_base_var(name, baselen, c); + return get_extended_base_var(name, c); if (!iskeychar(c) && c != '.') return -1; - if (baselen > MAXNAME / 2) - return -1; - name[baselen++] = tolower(c); + strbuf_addch(name, tolower(c)); } } -static int git_parse_file(config_fn_t fn, void *data) +static int git_parse_source(config_fn_t fn, void *data) { int comment = 0; int baselen = 0; - static char var[MAXNAME]; + struct strbuf *var = &cf->var; + int error_return = 0; + char *error_msg = NULL; /* U+FEFF Byte Order Mark in UTF8 */ - static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf"; - const unsigned char *bomptr = utf8_bom; + const char *bomptr = utf8_bom; for (;;) { int c = get_next_char(); @@ -213,7 +466,7 @@ static int git_parse_file(config_fn_t fn, void *data) /* 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) { + if (c == (*bomptr & 0377)) { bomptr++; continue; } else { @@ -225,7 +478,7 @@ static int git_parse_file(config_fn_t fn, void *data) } } if (c == '\n') { - if (config_file_eof) + if (cf->eof) return 0; comment = 0; continue; @@ -237,23 +490,63 @@ static int git_parse_file(config_fn_t fn, void *data) continue; } if (c == '[') { - baselen = get_base_var(var); - if (baselen <= 0) + /* Reset prior to determining a new stem */ + strbuf_reset(var); + if (get_base_var(var) < 0 || var->len < 1) break; - var[baselen++] = '.'; - var[baselen] = 0; + strbuf_addch(var, '.'); + baselen = var->len; continue; } if (!isalpha(c)) break; - var[baselen] = tolower(c); - if (get_value(fn, data, var, baselen+1) < 0) + /* + * Truncate the var name back to the section header + * stem prior to grabbing the suffix part of the name + * and the value. + */ + strbuf_setlen(var, baselen); + strbuf_addch(var, tolower(c)); + if (get_value(fn, data, var) < 0) break; } - die("bad config file line %d in %s", config_linenr, config_file_name); + + switch (cf->origin_type) { + case CONFIG_ORIGIN_BLOB: + error_msg = xstrfmt(_("bad config line %d in blob %s"), + cf->linenr, cf->name); + break; + case CONFIG_ORIGIN_FILE: + error_msg = xstrfmt(_("bad config line %d in file %s"), + cf->linenr, cf->name); + break; + case CONFIG_ORIGIN_STDIN: + error_msg = xstrfmt(_("bad config line %d in standard input"), + cf->linenr); + break; + case CONFIG_ORIGIN_SUBMODULE_BLOB: + error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"), + cf->linenr, cf->name); + break; + case CONFIG_ORIGIN_CMDLINE: + error_msg = xstrfmt(_("bad config line %d in command line %s"), + cf->linenr, cf->name); + break; + default: + error_msg = xstrfmt(_("bad config line %d in %s"), + cf->linenr, cf->name); + } + + if (cf->die_on_error) + die("%s", error_msg); + else + error_return = error("%s", error_msg); + + free(error_msg); + return error_return; } -static int parse_unit_factor(const char *end, unsigned long *val) +static int parse_unit_factor(const char *end, uintmax_t *val) { if (!*end) return 1; @@ -272,45 +565,137 @@ static int parse_unit_factor(const char *end, unsigned long *val) return 0; } -static int git_parse_long(const char *value, long *ret) +static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max) { if (value && *value) { char *end; - long val = strtol(value, &end, 0); - unsigned long factor = 1; - if (!parse_unit_factor(end, &factor)) + intmax_t val; + uintmax_t uval; + uintmax_t factor = 1; + + errno = 0; + val = strtoimax(value, &end, 0); + if (errno == ERANGE) + return 0; + if (!parse_unit_factor(end, &factor)) { + errno = EINVAL; return 0; - *ret = val * factor; + } + uval = labs(val); + uval *= factor; + if (uval > max || labs(val) > uval) { + errno = ERANGE; + return 0; + } + val *= factor; + *ret = val; return 1; } + errno = EINVAL; return 0; } -int git_parse_ulong(const char *value, unsigned long *ret) +static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max) { if (value && *value) { char *end; - unsigned long val = strtoul(value, &end, 0); - if (!parse_unit_factor(end, &val)) + uintmax_t val; + uintmax_t oldval; + + errno = 0; + val = strtoumax(value, &end, 0); + if (errno == ERANGE) + return 0; + oldval = val; + if (!parse_unit_factor(end, &val)) { + errno = EINVAL; return 0; + } + if (val > max || oldval > val) { + errno = ERANGE; + return 0; + } *ret = val; return 1; } + errno = EINVAL; return 0; } -static void die_bad_config(const char *name) +static int git_parse_int(const char *value, int *ret) +{ + intmax_t tmp; + if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int))) + return 0; + *ret = tmp; + return 1; +} + +static int git_parse_int64(const char *value, int64_t *ret) +{ + intmax_t tmp; + if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t))) + return 0; + *ret = tmp; + return 1; +} + +int git_parse_ulong(const char *value, unsigned long *ret) { - if (config_file_name) - die("bad config value for '%s' in %s", name, config_file_name); - die("bad config value for '%s'", name); + uintmax_t tmp; + if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long))) + return 0; + *ret = tmp; + return 1; +} + +NORETURN +static void die_bad_number(const char *name, const char *value) +{ + const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit"); + + if (!value) + value = ""; + + if (!(cf && cf->name)) + die(_("bad numeric config value '%s' for '%s': %s"), + value, name, error_type); + + switch (cf->origin_type) { + case CONFIG_ORIGIN_BLOB: + die(_("bad numeric config value '%s' for '%s' in blob %s: %s"), + value, name, cf->name, error_type); + case CONFIG_ORIGIN_FILE: + die(_("bad numeric config value '%s' for '%s' in file %s: %s"), + value, name, cf->name, error_type); + case CONFIG_ORIGIN_STDIN: + die(_("bad numeric config value '%s' for '%s' in standard input: %s"), + value, name, error_type); + case CONFIG_ORIGIN_SUBMODULE_BLOB: + die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"), + value, name, cf->name, error_type); + case CONFIG_ORIGIN_CMDLINE: + die(_("bad numeric config value '%s' for '%s' in command line %s: %s"), + value, name, cf->name, error_type); + default: + die(_("bad numeric config value '%s' for '%s' in %s: %s"), + value, name, cf->name, error_type); + } } int git_config_int(const char *name, const char *value) { - long ret = 0; - if (!git_parse_long(value, &ret)) - die_bad_config(name); + int ret; + if (!git_parse_int(value, &ret)) + die_bad_number(name, value); + return ret; +} + +int64_t git_config_int64(const char *name, const char *value) +{ + int64_t ret; + if (!git_parse_int64(value, &ret)) + die_bad_number(name, value); return ret; } @@ -318,21 +703,44 @@ unsigned long git_config_ulong(const char *name, const char *value) { unsigned long ret; if (!git_parse_ulong(value, &ret)) - die_bad_config(name); + die_bad_number(name, value); return ret; } -int git_config_bool_or_int(const char *name, const char *value, int *is_bool) +int git_parse_maybe_bool(const char *value) { - *is_bool = 1; if (!value) return 1; if (!*value) return 0; - if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on")) + if (!strcasecmp(value, "true") + || !strcasecmp(value, "yes") + || !strcasecmp(value, "on")) return 1; - if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off")) + if (!strcasecmp(value, "false") + || !strcasecmp(value, "no") + || !strcasecmp(value, "off")) return 0; + return -1; +} + +int git_config_maybe_bool(const char *name, const char *value) +{ + int v = git_parse_maybe_bool(value); + if (0 <= v) + return v; + if (git_parse_int(value, &v)) + return !!v; + return -1; +} + +int git_config_bool_or_int(const char *name, const char *value, int *is_bool) +{ + int v = git_parse_maybe_bool(value); + if (0 <= v) { + *is_bool = 1; + return v; + } *is_bool = 0; return git_config_int(name, value); } @@ -351,6 +759,16 @@ int git_config_string(const char **dest, const char *var, const char *value) return 0; } +int git_config_pathname(const char **dest, const char *var, const char *value) +{ + if (!value) + return config_error_nonbool(var); + *dest = expand_user_path(value); + if (!*dest) + die(_("failed to expand user dir in: '%s'"), value); + return 0; +} + static int git_default_core_config(const char *var, const char *value) { /* This needs a better name */ @@ -362,6 +780,12 @@ static int git_default_core_config(const char *var, const char *value) trust_ctime = git_config_bool(var, value); return 0; } + if (!strcmp(var, "core.checkstat")) { + if (!strcasecmp(value, "default")) + check_stat = 1; + else if (!strcasecmp(value, "minimal")) + check_stat = 0; + } if (!strcmp(var, "core.quotepath")) { quote_path_fully = git_config_bool(var, value); @@ -378,6 +802,12 @@ static int git_default_core_config(const char *var, const char *value) return 0; } + if (!strcmp(var, "core.attributesfile")) + return git_config_pathname(&git_attributes_file, var, value); + + if (!strcmp(var, "core.hookspath")) + return git_config_pathname(&git_hooks_path, var, value); + if (!strcmp(var, "core.bare")) { is_bare_repository_cfg = git_config_bool(var, value); return 0; @@ -403,12 +833,20 @@ static int git_default_core_config(const char *var, const char *value) return 0; } + if (!strcmp(var, "core.abbrev")) { + int abbrev = git_config_int(var, value); + if (abbrev < minimum_abbrev || abbrev > 40) + return -1; + default_abbrev = abbrev; + 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); + die(_("bad zlib compression level %d"), level); zlib_compression_level = level; zlib_compression_seen = 1; return 0; @@ -419,7 +857,7 @@ static int git_default_core_config(const char *var, const char *value) if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) - die("bad zlib compression level %d", level); + die(_("bad zlib compression level %d"), level); core_compression_level = level; core_compression_seen = 1; if (!zlib_compression_seen) @@ -429,7 +867,7 @@ static int git_default_core_config(const char *var, const char *value) if (!strcmp(var, "core.packedgitwindowsize")) { int pgsz_x2 = getpagesize() * 2; - packed_git_window_size = git_config_int(var, value); + packed_git_window_size = git_config_ulong(var, value); /* This value must be multiple of (pagesize * 2) */ packed_git_window_size /= pgsz_x2; @@ -439,19 +877,24 @@ static int git_default_core_config(const char *var, const char *value) return 0; } + if (!strcmp(var, "core.bigfilethreshold")) { + big_file_threshold = git_config_ulong(var, value); + return 0; + } + if (!strcmp(var, "core.packedgitlimit")) { - packed_git_limit = git_config_int(var, value); + packed_git_limit = git_config_ulong(var, value); return 0; } if (!strcmp(var, "core.deltabasecachelimit")) { - delta_base_cache_limit = git_config_int(var, value); + delta_base_cache_limit = git_config_ulong(var, value); return 0; } if (!strcmp(var, "core.autocrlf")) { if (value && !strcasecmp(value, "input")) { - auto_crlf = -1; + auto_crlf = AUTO_CRLF_INPUT; return 0; } auto_crlf = git_config_bool(var, value); @@ -467,14 +910,47 @@ static int git_default_core_config(const char *var, const char *value) return 0; } + if (!strcmp(var, "core.eol")) { + if (value && !strcasecmp(value, "lf")) + core_eol = EOL_LF; + else if (value && !strcasecmp(value, "crlf")) + core_eol = EOL_CRLF; + else if (value && !strcasecmp(value, "native")) + core_eol = EOL_NATIVE; + else + core_eol = EOL_UNSET; + return 0; + } + + if (!strcmp(var, "core.notesref")) { + notes_ref_name = xstrdup(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.commentchar")) { + if (!value) + return config_error_nonbool(var); + else if (!strcasecmp(value, "auto")) + auto_comment_line_char = 1; + else if (value[0] && !value[1]) { + comment_line_char = value[0]; + auto_comment_line_char = 0; + } else + return error("core.commentChar should only be one character"); + return 0; + } + + if (!strcmp(var, "core.askpass")) + return git_config_string(&askpass_program, var, value); + if (!strcmp(var, "core.excludesfile")) - return git_config_string(&excludes_file, var, value); + return git_config_pathname(&excludes_file, var, value); if (!strcmp(var, "core.whitespace")) { if (!value) @@ -499,31 +975,35 @@ static int git_default_core_config(const char *var, const char *value) else if (!strcmp(value, "link")) object_creation_mode = OBJECT_CREATION_USES_HARDLINKS; else - die("Invalid mode for object creation: %s", value); + die(_("invalid mode for object creation: %s"), value); return 0; } - /* Add other config variables here and to Documentation/config.txt. */ - return 0; -} + if (!strcmp(var, "core.sparsecheckout")) { + core_apply_sparse_checkout = git_config_bool(var, value); + 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; + if (!strcmp(var, "core.precomposeunicode")) { + precomposed_unicode = git_config_bool(var, value); 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; + if (!strcmp(var, "core.protecthfs")) { + protect_hfs = git_config_bool(var, value); + return 0; + } + + if (!strcmp(var, "core.protectntfs")) { + protect_ntfs = git_config_bool(var, value); + return 0; + } + + if (!strcmp(var, "core.hidedotfiles")) { + if (value && !strcasecmp(value, "dotgitonly")) + hide_dotfiles = HIDE_DOTFILES_DOTGITONLY; + else + hide_dotfiles = git_config_bool(var, value); return 0; } @@ -565,7 +1045,7 @@ static int git_default_branch_config(const char *var, const char *value) else if (!strcmp(value, "always")) autorebase = AUTOREBASE_ALWAYS; else - return error("Malformed value for %s", var); + return error("malformed value for %s", var); return 0; } @@ -582,14 +1062,18 @@ static int git_default_push_config(const char *var, const char *value) 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, "simple")) + push_default = PUSH_DEFAULT_SIMPLE; + else if (!strcmp(value, "upstream")) + push_default = PUSH_DEFAULT_UPSTREAM; + else if (!strcmp(value, "tracking")) /* deprecated */ + push_default = PUSH_DEFAULT_UPSTREAM; 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."); + error("malformed value for %s: %s", var, value); + return error("Must be one of nothing, matching, simple, " + "upstream or current."); } return 0; } @@ -601,7 +1085,9 @@ static int git_default_push_config(const char *var, const char *value) 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); + return git_config_pathname(&git_mailmap_file, var, value); + if (!strcmp(var, "mailmap.blob")) + return git_config_string(&git_mailmap_blob, var, value); /* Add other config variables here and to Documentation/config.txt. */ return 0; @@ -609,25 +1095,25 @@ static int git_default_mailmap_config(const char *var, const char *value) int git_default_config(const char *var, const char *value, void *dummy) { - if (!prefixcmp(var, "core.")) + if (starts_with(var, "core.")) return git_default_core_config(var, value); - if (!prefixcmp(var, "user.")) - return git_default_user_config(var, value); + if (starts_with(var, "user.")) + return git_ident_config(var, value, dummy); - if (!prefixcmp(var, "i18n.")) + if (starts_with(var, "i18n.")) return git_default_i18n_config(var, value); - if (!prefixcmp(var, "branch.")) + if (starts_with(var, "branch.")) return git_default_branch_config(var, value); - if (!prefixcmp(var, "push.")) + if (starts_with(var, "push.")) return git_default_push_config(var, value); - if (!prefixcmp(var, "mailmap.")) + if (starts_with(var, "mailmap.")) return git_default_mailmap_config(var, value); - if (!prefixcmp(var, "advice.")) + if (starts_with(var, "advice.")) return git_default_advice_config(var, value); if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { @@ -635,28 +1121,134 @@ int git_default_config(const char *var, const char *value, void *dummy) return 0; } + if (!strcmp(var, "pack.packsizelimit")) { + pack_size_limit_cfg = git_config_ulong(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) +/* + * All source specific fields in the union, die_on_error, name and the callbacks + * fgetc, ungetc, ftell of top need to be initialized before calling + * this function. + */ +static int do_config_from(struct config_source *top, config_fn_t fn, void *data) { int ret; - FILE *f = fopen(filename, "r"); - ret = -1; + /* push config-file parsing state stack */ + top->prev = cf; + top->linenr = 1; + top->eof = 0; + strbuf_init(&top->value, 1024); + strbuf_init(&top->var, 1024); + cf = top; + + ret = git_parse_source(fn, data); + + /* pop config-file parsing state stack */ + strbuf_release(&top->value); + strbuf_release(&top->var); + cf = top->prev; + + return ret; +} + +static int do_config_from_file(config_fn_t fn, + const enum config_origin_type origin_type, + const char *name, const char *path, FILE *f, + void *data) +{ + struct config_source top; + + top.u.file = f; + top.origin_type = origin_type; + top.name = name; + top.path = path; + top.die_on_error = 1; + top.do_fgetc = config_file_fgetc; + top.do_ungetc = config_file_ungetc; + top.do_ftell = config_file_ftell; + + return do_config_from(&top, fn, data); +} + +static int git_config_from_stdin(config_fn_t fn, void *data) +{ + return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data); +} + +int git_config_from_file(config_fn_t fn, const char *filename, void *data) +{ + int ret = -1; + FILE *f; + + f = fopen(filename, "r"); if (f) { - config_file = f; - config_file_name = filename; - config_linenr = 1; - config_file_eof = 0; - ret = git_parse_file(fn, data); + flockfile(f); + ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data); + funlockfile(f); fclose(f); - config_file_name = NULL; } return ret; } +int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type, + const char *name, const char *buf, size_t len, void *data) +{ + struct config_source top; + + top.u.buf.buf = buf; + top.u.buf.len = len; + top.u.buf.pos = 0; + top.origin_type = origin_type; + top.name = name; + top.path = NULL; + top.die_on_error = 0; + top.do_fgetc = config_buf_fgetc; + top.do_ungetc = config_buf_ungetc; + top.do_ftell = config_buf_ftell; + + return do_config_from(&top, fn, data); +} + +static int git_config_from_blob_sha1(config_fn_t fn, + const char *name, + const unsigned char *sha1, + void *data) +{ + enum object_type type; + char *buf; + unsigned long size; + int ret; + + buf = read_sha1_file(sha1, &type, &size); + if (!buf) + return error("unable to load config blob object '%s'", name); + if (type != OBJ_BLOB) { + free(buf); + return error("reference '%s' does not point to a blob", name); + } + + ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data); + free(buf); + + return ret; +} + +static int git_config_from_blob_ref(config_fn_t fn, + const char *name, + void *data) +{ + unsigned char sha1[20]; + + if (get_sha1(name, sha1) < 0) + return error("unable to resolve config blob '%s'", name); + return git_config_from_blob_sha1(fn, name, sha1, data); +} + const char *git_etc_gitconfig(void) { static const char *system_wide; @@ -665,81 +1257,512 @@ const char *git_etc_gitconfig(void) return system_wide; } -static int git_env_bool(const char *k, int def) +/* + * Parse environment variable 'k' as a boolean (in various + * possible spellings); if missing, use the default value 'def'. + */ +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) +/* + * Parse environment variable 'k' as ulong with possibly a unit + * suffix; if missing, use the default value 'val'. + */ +unsigned long git_env_ulong(const char *k, unsigned long val) { - return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0); + const char *v = getenv(k); + if (v && !git_parse_ulong(v, &val)) + die("failed to parse %s", k); + return val; } -int git_config_global(void) +int git_config_system(void) { - return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0); + return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0); } -int git_config(config_fn_t fn, void *data) +static int do_git_config_sequence(config_fn_t fn, void *data) { - int ret = 0, found = 0; - char *repo_config = NULL; - const char *home = NULL; + int ret = 0; + char *xdg_config = xdg_config_home("config"); + char *user_config = expand_user_path("~/.gitconfig"); + char *repo_config = git_pathdup("config"); - /* 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)) { + current_parsing_scope = CONFIG_SCOPE_SYSTEM; + if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) ret += git_config_from_file(fn, git_etc_gitconfig(), data); - found += 1; + + current_parsing_scope = CONFIG_SCOPE_GLOBAL; + if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) + ret += git_config_from_file(fn, xdg_config, data); + + if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) + ret += git_config_from_file(fn, user_config, data); + + current_parsing_scope = CONFIG_SCOPE_REPO; + if (repo_config && !access_or_die(repo_config, R_OK, 0)) + ret += git_config_from_file(fn, repo_config, data); + + current_parsing_scope = CONFIG_SCOPE_CMDLINE; + if (git_config_from_parameters(fn, data) < 0) + die(_("unable to parse command-line config")); + + current_parsing_scope = CONFIG_SCOPE_UNKNOWN; + free(xdg_config); + free(user_config); + free(repo_config); + return ret; +} + +int git_config_with_options(config_fn_t fn, void *data, + struct git_config_source *config_source, + int respect_includes) +{ + struct config_include_data inc = CONFIG_INCLUDE_INIT; + + if (respect_includes) { + inc.fn = fn; + inc.data = data; + fn = git_config_include; + data = &inc; } - 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); + /* + * If we have a specific filename, use it. Otherwise, follow the + * regular lookup sequence. + */ + if (config_source && config_source->use_stdin) + return git_config_from_stdin(fn, data); + else if (config_source && config_source->file) + return git_config_from_file(fn, config_source->file, data); + else if (config_source && config_source->blob) + return git_config_from_blob_ref(fn, config_source->blob, data); + + return do_git_config_sequence(fn, data); +} + +static void git_config_raw(config_fn_t fn, void *data) +{ + if (git_config_with_options(fn, data, NULL, 1) < 0) + /* + * git_config_with_options() normally returns only + * zero, as most errors are fatal, and + * non-fatal potential errors are guarded by "if" + * statements that are entered only when no error is + * possible. + * + * If we ever encounter a non-fatal error, it means + * something went really wrong and we should stop + * immediately. + */ + die(_("unknown error occurred while reading the configuration files")); +} + +static void configset_iter(struct config_set *cs, config_fn_t fn, void *data) +{ + int i, value_index; + struct string_list *values; + struct config_set_element *entry; + struct configset_list *list = &cs->list; + + for (i = 0; i < list->nr; i++) { + entry = list->items[i].e; + value_index = list->items[i].value_index; + values = &entry->value_list; + + current_config_kvi = values->items[value_index].util; + + if (fn(entry->key, values->items[value_index].string, data) < 0) + git_die_config_linenr(entry->key, + current_config_kvi->filename, + current_config_kvi->linenr); + + current_config_kvi = NULL; } +} - repo_config = git_pathdup("config"); - if (!access(repo_config, R_OK)) { - ret += git_config_from_file(fn, repo_config, data); - found += 1; +static void git_config_check_init(void); + +void git_config(config_fn_t fn, void *data) +{ + git_config_check_init(); + configset_iter(&the_config_set, fn, data); +} + +static struct config_set_element *configset_find_element(struct config_set *cs, const char *key) +{ + struct config_set_element k; + struct config_set_element *found_entry; + char *normalized_key; + /* + * `key` may come from the user, so normalize it before using it + * for querying entries from the hashmap. + */ + if (git_config_parse_key(key, &normalized_key, NULL)) + return NULL; + + hashmap_entry_init(&k, strhash(normalized_key)); + k.key = normalized_key; + found_entry = hashmap_get(&cs->config_hash, &k, NULL); + free(normalized_key); + return found_entry; +} + +static int configset_add_value(struct config_set *cs, const char *key, const char *value) +{ + struct config_set_element *e; + struct string_list_item *si; + struct configset_list_item *l_item; + struct key_value_info *kv_info = xmalloc(sizeof(*kv_info)); + + e = configset_find_element(cs, key); + /* + * Since the keys are being fed by git_config*() callback mechanism, they + * are already normalized. So simply add them without any further munging. + */ + if (!e) { + e = xmalloc(sizeof(*e)); + hashmap_entry_init(e, strhash(key)); + e->key = xstrdup(key); + string_list_init(&e->value_list, 1); + hashmap_add(&cs->config_hash, e); } - free(repo_config); - if (found == 0) - return -1; + si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value)); + + ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc); + l_item = &cs->list.items[cs->list.nr++]; + l_item->e = e; + l_item->value_index = e->value_list.nr - 1; + + if (!cf) + die("BUG: configset_add_value has no source"); + if (cf->name) { + kv_info->filename = strintern(cf->name); + kv_info->linenr = cf->linenr; + kv_info->origin_type = cf->origin_type; + } else { + /* for values read from `git_config_from_parameters()` */ + kv_info->filename = NULL; + kv_info->linenr = -1; + kv_info->origin_type = CONFIG_ORIGIN_CMDLINE; + } + kv_info->scope = current_parsing_scope; + si->util = kv_info; + + return 0; +} + +static int config_set_element_cmp(const struct config_set_element *e1, + const struct config_set_element *e2, const void *unused) +{ + return strcmp(e1->key, e2->key); +} + +void git_configset_init(struct config_set *cs) +{ + hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0); + cs->hash_initialized = 1; + cs->list.nr = 0; + cs->list.alloc = 0; + cs->list.items = NULL; +} + +void git_configset_clear(struct config_set *cs) +{ + struct config_set_element *entry; + struct hashmap_iter iter; + if (!cs->hash_initialized) + return; + + hashmap_iter_init(&cs->config_hash, &iter); + while ((entry = hashmap_iter_next(&iter))) { + free(entry->key); + string_list_clear(&entry->value_list, 1); + } + hashmap_free(&cs->config_hash, 1); + cs->hash_initialized = 0; + free(cs->list.items); + cs->list.nr = 0; + cs->list.alloc = 0; + cs->list.items = NULL; +} + +static int config_set_callback(const char *key, const char *value, void *cb) +{ + struct config_set *cs = cb; + configset_add_value(cs, key, value); + return 0; +} + +int git_configset_add_file(struct config_set *cs, const char *filename) +{ + return git_config_from_file(config_set_callback, filename, cs); +} + +int git_configset_get_value(struct config_set *cs, const char *key, const char **value) +{ + const struct string_list *values = NULL; + /* + * Follows "last one wins" semantic, i.e., if there are multiple matches for the + * queried key in the files of the configset, the value returned will be the last + * value in the value list for that key. + */ + values = git_configset_get_value_multi(cs, key); + + if (!values) + return 1; + assert(values->nr > 0); + *value = values->items[values->nr - 1].string; + return 0; +} + +const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key) +{ + struct config_set_element *e = configset_find_element(cs, key); + return e ? &e->value_list : NULL; +} + +int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) + return git_config_string(dest, key, value); + else + return 1; +} + +int git_configset_get_string(struct config_set *cs, const char *key, char **dest) +{ + return git_configset_get_string_const(cs, key, (const char **)dest); +} + +int git_configset_get_int(struct config_set *cs, const char *key, int *dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) { + *dest = git_config_int(key, value); + return 0; + } else + return 1; +} + +int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) { + *dest = git_config_ulong(key, value); + return 0; + } else + return 1; +} + +int git_configset_get_bool(struct config_set *cs, const char *key, int *dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) { + *dest = git_config_bool(key, value); + return 0; + } else + return 1; +} + +int git_configset_get_bool_or_int(struct config_set *cs, const char *key, + int *is_bool, int *dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) { + *dest = git_config_bool_or_int(key, value, is_bool); + return 0; + } else + return 1; +} + +int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) { + *dest = git_config_maybe_bool(key, value); + if (*dest == -1) + return -1; + return 0; + } else + return 1; +} + +int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest) +{ + const char *value; + if (!git_configset_get_value(cs, key, &value)) + return git_config_pathname(dest, key, value); + else + return 1; +} + +static void git_config_check_init(void) +{ + if (the_config_set.hash_initialized) + return; + git_configset_init(&the_config_set); + git_config_raw(config_set_callback, &the_config_set); +} + +void git_config_clear(void) +{ + if (!the_config_set.hash_initialized) + return; + git_configset_clear(&the_config_set); +} + +int git_config_get_value(const char *key, const char **value) +{ + git_config_check_init(); + return git_configset_get_value(&the_config_set, key, value); +} + +const struct string_list *git_config_get_value_multi(const char *key) +{ + git_config_check_init(); + return git_configset_get_value_multi(&the_config_set, key); +} + +int git_config_get_string_const(const char *key, const char **dest) +{ + int ret; + git_config_check_init(); + ret = git_configset_get_string_const(&the_config_set, key, dest); + if (ret < 0) + git_die_config(key, NULL); + return ret; +} + +int git_config_get_string(const char *key, char **dest) +{ + git_config_check_init(); + return git_config_get_string_const(key, (const char **)dest); +} + +int git_config_get_int(const char *key, int *dest) +{ + git_config_check_init(); + return git_configset_get_int(&the_config_set, key, dest); +} + +int git_config_get_ulong(const char *key, unsigned long *dest) +{ + git_config_check_init(); + return git_configset_get_ulong(&the_config_set, key, dest); +} + +int git_config_get_bool(const char *key, int *dest) +{ + git_config_check_init(); + return git_configset_get_bool(&the_config_set, key, dest); +} + +int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest) +{ + git_config_check_init(); + return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest); +} + +int git_config_get_maybe_bool(const char *key, int *dest) +{ + git_config_check_init(); + return git_configset_get_maybe_bool(&the_config_set, key, dest); +} + +int git_config_get_pathname(const char *key, const char **dest) +{ + int ret; + git_config_check_init(); + ret = git_configset_get_pathname(&the_config_set, key, dest); + if (ret < 0) + git_die_config(key, NULL); return ret; } +int git_config_get_untracked_cache(void) +{ + int val = -1; + const char *v; + + /* Hack for test programs like test-dump-untracked-cache */ + if (ignore_untracked_cache_config) + return -1; + + if (!git_config_get_maybe_bool("core.untrackedcache", &val)) + return val; + + if (!git_config_get_value("core.untrackedcache", &v)) { + if (!strcasecmp(v, "keep")) + return -1; + + error("unknown core.untrackedCache value '%s'; " + "using 'keep' default value", v); + return -1; + } + + return -1; /* default value */ +} + +NORETURN +void git_die_config_linenr(const char *key, const char *filename, int linenr) +{ + if (!filename) + die(_("unable to parse '%s' from command-line config"), key); + else + die(_("bad config variable '%s' in file '%s' at line %d"), + key, filename, linenr); +} + +NORETURN __attribute__((format(printf, 2, 3))) +void git_die_config(const char *key, const char *err, ...) +{ + const struct string_list *values; + struct key_value_info *kv_info; + + if (err) { + va_list params; + va_start(params, err); + vreportf("error: ", err, params); + va_end(params); + } + values = git_config_get_value_multi(key); + kv_info = values->items[values->nr - 1].util; + git_die_config_linenr(key, kv_info->filename, kv_info->linenr); +} + /* * 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]; + size_t *offset; + unsigned int offset_alloc; 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))); + if (strcmp(key, store.key)) + return 0; /* not ours */ + if (!store.value_regex) + return 1; /* always matches */ + if (store.value_regex == CONFIG_REGEX_NONE) + return 0; /* never matches */ + + return store.do_not_match ^ + (value && !regexec(store.value_regex, value, 0, NULL, 0)); } static int store_aux(const char *key, const char *value, void *cb) @@ -751,13 +1774,13 @@ static int store_aux(const char *key, const char *value, void *cb) 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; + warning(_("%s has multiple values"), key); } - store.offset[store.seen] = ftell(config_file); + ALLOC_GROW(store.offset, store.seen + 1, + store.offset_alloc); + + store.offset[store.seen] = cf->do_ftell(cf); store.seen++; } break; @@ -784,19 +1807,26 @@ static int store_aux(const char *key, const char *value, void *cb) * 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); + ALLOC_GROW(store.offset, store.seen + 1, + store.offset_alloc); + store.offset[store.seen] = cf->do_ftell(cf); /* fallthru */ case SECTION_END_SEEN: case START: if (matches(key, value)) { - store.offset[store.seen] = ftell(config_file); + ALLOC_GROW(store.offset, store.seen + 1, + store.offset_alloc); + store.offset[store.seen] = cf->do_ftell(cf); 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); + ALLOC_GROW(store.offset, + store.seen + 1, + store.offset_alloc); + store.offset[store.seen] = cf->do_ftell(cf); } } } @@ -910,14 +1940,120 @@ contline: return offset; } -int git_config_set(const char *key, const char *value) +int git_config_set_in_file_gently(const char *config_filename, + const char *key, const char *value) { - return git_config_set_multivar(key, value, NULL, 0); + return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0); +} + +void git_config_set_in_file(const char *config_filename, + const char *key, const char *value) +{ + git_config_set_multivar_in_file(config_filename, key, value, NULL, 0); +} + +int git_config_set_gently(const char *key, const char *value) +{ + return git_config_set_multivar_gently(key, value, NULL, 0); +} + +void git_config_set(const char *key, const char *value) +{ + git_config_set_multivar(key, value, NULL, 0); +} + +/* + * Auxiliary function to sanity-check and split the key into the section + * identifier and variable name. + * + * Returns 0 on success, -1 when there is an invalid character in the key and + * -2 if there is no section name in the key. + * + * store_key - pointer to char* which will hold a copy of the key with + * lowercase section and variable name + * baselen - pointer to int which will hold the length of the + * section + subsection part, can be NULL + */ +static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet) +{ + int i, dot, baselen; + const char *last_dot = strrchr(key, '.'); + + /* + * 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 || last_dot == key) { + if (!quiet) + error("key does not contain a section: %s", key); + return -CONFIG_NO_SECTION_OR_NAME; + } + + if (!last_dot[1]) { + if (!quiet) + error("key does not contain variable name: %s", key); + return -CONFIG_NO_SECTION_OR_NAME; + } + + baselen = last_dot - key; + if (baselen_) + *baselen_ = baselen; + + /* + * Validate the key and while at it, lower case it for matching. + */ + if (store_key) + *store_key = xmallocz(strlen(key)); + + 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 > baselen) { + if (!iskeychar(c) || + (i == baselen + 1 && !isalpha(c))) { + if (!quiet) + error("invalid key: %s", key); + goto out_free_ret_1; + } + c = tolower(c); + } else if (c == '\n') { + if (!quiet) + error("invalid key (newline): %s", key); + goto out_free_ret_1; + } + if (store_key) + (*store_key)[i] = c; + } + + return 0; + +out_free_ret_1: + if (store_key) { + free(*store_key); + *store_key = NULL; + } + return -CONFIG_INVALID_KEY; +} + +int git_config_parse_key(const char *key, char **store_key, int *baselen) +{ + return git_config_parse_key_1(key, store_key, baselen, 0); +} + +int git_config_key_is_valid(const char *key) +{ + return !git_config_parse_key_1(key, NULL, NULL, 1); } /* * If value==NULL, unset in (remove from) config, * if value_regex!=NULL, disregard key/value pairs where value does not match. + * if value_regex==CONFIG_REGEX_NONE, do not match any existing values + * (only add a new one) * 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. @@ -938,73 +2074,38 @@ int git_config_set(const char *key, const char *value) * - 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 git_config_set_multivar_in_file_gently(const char *config_filename, + const char *key, const char *value, + const char *value_regex, + int multi_replace) { - int i, dot; - int fd = -1, in_fd; + int fd = -1, in_fd = -1; 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"); + char *filename_buf = NULL; + char *contents = NULL; + size_t contents_sz; - /* - * 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; + /* parse-key returns negative; flip the sign to feed exit(3) */ + ret = 0 - git_config_parse_key(key, &store.key, &store.baselen); + if (ret) 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; + if (!config_filename) + config_filename = filename_buf = git_pathdup("config"); /* * 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); + lock = xcalloc(1, sizeof(struct lock_file)); 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)); + error_errno("could not lock config file %s", config_filename); free(store.key); - ret = -1; + ret = CONFIG_NO_LOCK; goto out_free; } @@ -1016,14 +2117,13 @@ int git_config_set_multivar(const char *key, const char *value, free(store.key); if ( ENOENT != errno ) { - error("opening %s: %s", config_filename, - strerror(errno)); - ret = 3; /* same as "invalid config file" */ + error_errno("opening %s", config_filename); + ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */ goto out_free; } /* if nothing to unset, error out */ if (value == NULL) { - ret = 5; + ret = CONFIG_NOTHING_SET; goto out_free; } @@ -1033,12 +2133,13 @@ int git_config_set_multivar(const char *key, const char *value, goto write_err_out; } else { struct stat st; - char *contents; - size_t contents_sz, copy_begin, copy_end; + size_t copy_begin, copy_end; int i, new_line = 0; if (value_regex == NULL) store.value_regex = NULL; + else if (value_regex == CONFIG_REGEX_NONE) + store.value_regex = CONFIG_REGEX_NONE; else { if (value_regex[0] == '!') { store.do_not_match = 1; @@ -1051,11 +2152,12 @@ int git_config_set_multivar(const char *key, const char *value, REG_EXTENDED)) { error("invalid pattern: %s", value_regex); free(store.value_regex); - ret = 6; + ret = CONFIG_INVALID_PATTERN; goto out_free; } } + ALLOC_GROW(store.offset, 1, store.offset_alloc); store.offset[0] = 0; store.state = START; store.seen = 0; @@ -1069,16 +2171,18 @@ int git_config_set_multivar(const char *key, const char *value, 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) { + if (store.value_regex != NULL && + store.value_regex != CONFIG_REGEX_NONE) { regfree(store.value_regex); free(store.value_regex); } - ret = 3; + ret = CONFIG_INVALID_FILE; goto out_free; } free(store.key); - if (store.value_regex != NULL) { + if (store.value_regex != NULL && + store.value_regex != CONFIG_REGEX_NONE) { regfree(store.value_regex); free(store.value_regex); } @@ -1086,15 +2190,30 @@ int git_config_set_multivar(const char *key, const char *value, /* if nothing to unset, or too many matches, error out */ if ((store.seen == 0 && value == NULL) || (store.seen > 1 && multi_replace == 0)) { - ret = 5; + ret = CONFIG_NOTHING_SET; 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); + contents = xmmap_gently(NULL, contents_sz, PROT_READ, + MAP_PRIVATE, in_fd, 0); + if (contents == MAP_FAILED) { + if (errno == ENODEV && S_ISDIR(st.st_mode)) + errno = EISDIR; + error_errno("unable to mmap '%s'", config_filename); + ret = CONFIG_INVALID_FILE; + contents = NULL; + goto out_free; + } close(in_fd); + in_fd = -1; + + if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) { + error_errno("chmod on %s failed", get_lock_file_path(lock)); + ret = CONFIG_NO_WRITE; + goto out_free; + } if (store.seen == 0) store.seen = 1; @@ -1143,11 +2262,13 @@ int git_config_set_multivar(const char *key, const char *value, goto write_err_out; munmap(contents, contents_sz); + contents = NULL; } if (commit_lock_file(lock) < 0) { - error("could not commit config file %s", config_filename); - ret = 4; + error_errno("could not write config file %s", config_filename); + ret = CONFIG_NO_WRITE; + lock = NULL; goto out_free; } @@ -1160,18 +2281,52 @@ int git_config_set_multivar(const char *key, const char *value, lock = NULL; ret = 0; + /* Invalidate the config cache */ + git_config_clear(); + out_free: if (lock) rollback_lock_file(lock); - free(config_filename); + free(filename_buf); + if (contents) + munmap(contents, contents_sz); + if (in_fd >= 0) + close(in_fd); return ret; write_err_out: - ret = write_error(lock->filename); + ret = write_error(get_lock_file_path(lock)); goto out_free; } +void git_config_set_multivar_in_file(const char *config_filename, + const char *key, const char *value, + const char *value_regex, int multi_replace) +{ + if (!git_config_set_multivar_in_file_gently(config_filename, key, value, + value_regex, multi_replace)) + return; + if (value) + die(_("could not set '%s' to '%s'"), key, value); + else + die(_("could not unset '%s'"), key); +} + +int git_config_set_multivar_gently(const char *key, const char *value, + const char *value_regex, int multi_replace) +{ + return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex, + multi_replace); +} + +void git_config_set_multivar(const char *key, const char *value, + const char *value_regex, int multi_replace) +{ + git_config_set_multivar_in_file(NULL, key, value, value_regex, + multi_replace); +} + static int section_name_match (const char *buf, const char *name) { int i = 0, j = 0, dot = 0; @@ -1211,19 +2366,43 @@ static int section_name_match (const char *buf, const char *name) return 0; } +static int section_name_is_ok(const char *name) +{ + /* Empty section names are bogus. */ + if (!*name) + return 0; + + /* + * Before a dot, we must be alphanumeric or dash. After the first dot, + * anything goes, so we can stop checking. + */ + for (; *name && *name != '.'; name++) + if (*name != '-' && !isalnum(*name)) + return 0; + return 1; +} + /* if new_name == NULL, the section is removed instead */ -int git_config_rename_section(const char *old_name, const char *new_name) +int git_config_rename_section_in_file(const char *config_filename, + 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); + char *filename_buf = NULL; + struct lock_file *lock; int out_fd; char buf[1024]; + FILE *config_file; + struct stat st; - if (config_exclusive_filename) - config_filename = xstrdup(config_exclusive_filename); - else - config_filename = git_pathdup("config"); + if (new_name && !section_name_is_ok(new_name)) { + ret = error("invalid section name: %s", new_name); + goto out; + } + + if (!config_filename) + config_filename = filename_buf = git_pathdup("config"); + + lock = xcalloc(1, sizeof(struct lock_file)); 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); @@ -1235,6 +2414,14 @@ int git_config_rename_section(const char *old_name, const char *new_name) goto unlock_and_out; } + fstat(fileno(config_file), &st); + + if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) { + ret = error_errno("chmod on %s failed", + get_lock_file_path(lock)); + goto out; + } + while (fgets(buf, sizeof(buf), config_file)) { int i; int length; @@ -1252,7 +2439,7 @@ int git_config_rename_section(const char *old_name, const char *new_name) } store.baselen = strlen(new_name); if (!store_write_section(out_fd, new_name)) { - ret = write_error(lock->filename); + ret = write_error(get_lock_file_path(lock)); goto out; } /* @@ -1278,24 +2465,110 @@ int git_config_rename_section(const char *old_name, const char *new_name) continue; length = strlen(output); if (write_in_full(out_fd, output, length) != length) { - ret = write_error(lock->filename); + ret = write_error(get_lock_file_path(lock)); goto out; } } fclose(config_file); - unlock_and_out: +unlock_and_out: if (commit_lock_file(lock) < 0) - ret = error("could not commit config file %s", config_filename); - out: - free(config_filename); + ret = error_errno("could not write config file %s", + config_filename); +out: + free(filename_buf); return ret; } +int git_config_rename_section(const char *old_name, const char *new_name) +{ + return git_config_rename_section_in_file(NULL, old_name, new_name); +} + /* * Call this to report error for your variable that should not * get a boolean value (i.e. "[my] var" means "true"). */ +#undef config_error_nonbool int config_error_nonbool(const char *var) { - return error("Missing value for '%s'", var); + return error("missing value for '%s'", var); +} + +int parse_config_key(const char *var, + const char *section, + const char **subsection, int *subsection_len, + const char **key) +{ + int section_len = strlen(section); + const char *dot; + + /* Does it start with "section." ? */ + if (!starts_with(var, section) || var[section_len] != '.') + return -1; + + /* + * Find the key; we don't know yet if we have a subsection, but we must + * parse backwards from the end, since the subsection may have dots in + * it, too. + */ + dot = strrchr(var, '.'); + *key = dot + 1; + + /* Did we have a subsection at all? */ + if (dot == var + section_len) { + *subsection = NULL; + *subsection_len = 0; + } + else { + *subsection = var + section_len + 1; + *subsection_len = dot - *subsection; + } + + return 0; +} + +const char *current_config_origin_type(void) +{ + int type; + if (current_config_kvi) + type = current_config_kvi->origin_type; + else if(cf) + type = cf->origin_type; + else + die("BUG: current_config_origin_type called outside config callback"); + + switch (type) { + case CONFIG_ORIGIN_BLOB: + return "blob"; + case CONFIG_ORIGIN_FILE: + return "file"; + case CONFIG_ORIGIN_STDIN: + return "standard input"; + case CONFIG_ORIGIN_SUBMODULE_BLOB: + return "submodule-blob"; + case CONFIG_ORIGIN_CMDLINE: + return "command line"; + default: + die("BUG: unknown config origin type"); + } +} + +const char *current_config_name(void) +{ + const char *name; + if (current_config_kvi) + name = current_config_kvi->filename; + else if (cf) + name = cf->name; + else + die("BUG: current_config_name called outside config callback"); + return name ? name : ""; +} + +enum config_scope current_config_scope(void) +{ + if (current_config_kvi) + return current_config_kvi->scope; + else + return current_parsing_scope; } |