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* GIT - The information manager from hell

* Copyright (C) Linus Torvalds, 2005

* Copyright (C) Johannes Schindelin, 2005

#include "cache.h"

#include "exec_cmd.h"

#include "strbuf.h"

#include "quote.h"

#define MAXNAME (256)

typedef struct config_file {

struct config_file *prev;

FILE *f;

const char *name;

int linenr;

int eof;

struct strbuf value;

char var[MAXNAME];

} config_file;

static config_file *cf;

static int zlib_compression_seen;

const char *config_exclusive_filename = NULL;

static void lowercase(char *p)

{

for (; *p; p++)

*p = tolower(*p);

}

void git_config_push_parameter(const char *text)

{

struct strbuf env = STRBUF_INIT;

const char *old = getenv(CONFIG_DATA_ENVIRONMENT);

if (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)

{

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);

strbuf_trim(pair[0]);

if (!pair[0]->len) {

strbuf_list_free(pair);

return error("bogus config parameter: %s", text);

}

lowercase(pair[0]->buf);

if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, 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);

char *envw;

const char **argv = NULL;

int nr = 0, alloc = 0;

int i;

if (!env)

return 0;

/* sq_dequote will write over it */

envw = xstrdup(env);

if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {

free(envw);

return error("bogus format in " CONFIG_DATA_ENVIRONMENT);

}

for (i = 0; i < nr; i++) {

if (git_config_parse_parameter(argv[i], fn, data) < 0) {

free(argv);

free(envw);

return -1;

}

free(argv);

free(envw);

return nr > 0;

}

static int get_next_char(void)

{

int c;

FILE *f;

c = '\n';

if (cf && ((f = cf->f) != NULL)) {

c = fgetc(f);

if (c == '\r') {

/* DOS like systems */

c = fgetc(f);

if (c != '\n') {

ungetc(c, f);

c = '\r';

}

if (c == '\n')

cf->linenr++;

if (c == EOF) {

cf->eof = 1;

c = '\n';

}

return c;

}

static char *parse_value(void)

{

int quote = 0, comment = 0, space = 0;

strbuf_reset(&cf->value);

for (;;) {

int c = get_next_char();

if (c == '\n') {

if (quote)

return NULL;

return cf->value.buf;

}

if (comment)

continue;

if (isspace(c) && !quote) {

if (cf->value.len)

space++;

continue;

}

if (!quote) {

if (c == ';' || c == '#') {

comment = 1;

continue;

}

for (; space; space--)

strbuf_addch(&cf->value, ' ');

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;

}

strbuf_addch(&cf->value, c);

continue;

}

if (c == '"') {

quote = 1-quote;

continue;

}

strbuf_addch(&cf->value, 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 (cf->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 (cf->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;

char *var = cf->var;

/* 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 (cf->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", cf->linenr, cf->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 (cf && cf->name)

die("bad config value for '%s' in %s", name, cf->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;

}

static int git_config_maybe_bool_text(const char *name, const char *value)

{

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;

return -1;

}

int git_config_maybe_bool(const char *name, const char *value)

{

long v = git_config_maybe_bool_text(name, value);

if (0 <= v)

return v;

if (git_parse_long(value, &v))

return !!v;

return -1;

}

int git_config_bool_or_int(const char *name, const char *value, int *is_bool)

{

int v = git_config_maybe_bool_text(name, value);

if (0 <= v) {

*is_bool = 1;

return v;

}

*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;

}

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 */

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.attributesfile"))

return git_config_pathname(&git_attributes_file, var, value);

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.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);

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.bigfilethreshold")) {

long n = git_config_int(var, value);

big_file_threshold = 0 < n ? n : 0;

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.logpackaccess"))

return git_config_string(&log_pack_access, var, value);

if (!strcmp(var, "core.autocrlf")) {

if (value && !strcasecmp(value, "input")) {

if (core_eol == EOL_CRLF)

return error("core.autocrlf=input conflicts with core.eol=crlf");

auto_crlf = AUTO_CRLF_INPUT;

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.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;

if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)

return error("core.autocrlf=input conflicts with core.eol=crlf");

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.askpass"))

return git_config_string(&askpass_program, var, value);

if (!strcmp(var, "core.excludesfile"))

return git_config_pathname(&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;

}

if (!strcmp(var, "core.sparsecheckout")) {

core_apply_sparse_checkout = git_config_bool(var, 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));

user_ident_explicitly_given |= IDENT_NAME_GIVEN;

return 0;

}

if (!strcmp(var, "user.email")) {

if (!value)

return config_error_nonbool(var);

strlcpy(git_default_email, value, sizeof(git_default_email));

user_ident_explicitly_given |= IDENT_MAIL_GIVEN;

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, "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.");

}

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 (!prefixcmp(var, "advice."))

return git_default_advice_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 top;

/* push config-file parsing state stack */

top.prev = cf;

top.f = f;

top.name = filename;

top.linenr = 1;

top.eof = 0;

strbuf_init(&top.value, 1024);

cf = &top;

ret = git_parse_file(fn, data);

/* pop config-file parsing state stack */

strbuf_release(&top.value);

cf = top.prev;

fclose(f);

}

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;

}

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_early(config_fn_t fn, void *data, const char *repo_config)

{

int ret = 0, found = 0;

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 (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 (repo_config && !access(repo_config, R_OK)) {

ret += git_config_from_file(fn, repo_config, data);

found += 1;

}

switch (git_config_from_parameters(fn, data)) {

case -1: /* error */

die("unable to parse command-line config");

break;

case 0: /* found nothing */

break;

default: /* found at least one item */

found++;

break;

}

return ret == 0 ? found : ret;

}

int git_config(config_fn_t fn, void *data)

{

char *repo_config = NULL;

int ret;

repo_config = git_pathdup("config");

ret = git_config_early(fn, data, repo_config);

if (repo_config)

free(repo_config);

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;

FILE *f = cf->f;

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(f);

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(f);

/* fallthru */

case SECTION_END_SEEN:

case START:

if (matches(key, value)) {

store.offset[store.seen] = ftell(f);

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(f);

}

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;

}

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