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https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
![Jeff King](/assets/img/avatar_default.png)
We xmalloc a fixed-size buffer and sprintf into it; this is OK because the size of our formatting types is finite, but that's not immediately clear to a reader auditing sprintf calls. Let's switch to xstrfmt, which is shorter and obviously correct. Note that just dropping the common xmalloc here causes gcc to complain with -Wmaybe-uninitialized. That's because if "types" does not match any of our known types, we never write anything into the "normalized" pointer. With the current code, gcc doesn't notice because we always return a valid pointer (just one which might point to uninitialized data, but the compiler doesn't know that). In other words, the current code is potentially buggy if new types are added without updating this spot. So let's take this opportunity to clean up the function a bit more. We can drop the "normalized" pointer entirely, and just return directly from each code path. And then add an assertion at the end in case we haven't covered any cases. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
684 lines
19 KiB
C
684 lines
19 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "color.h"
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#include "parse-options.h"
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#include "urlmatch.h"
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static const char *const builtin_config_usage[] = {
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N_("git config [<options>]"),
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NULL
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};
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static char *key;
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static regex_t *key_regexp;
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static regex_t *regexp;
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static int show_keys;
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static int omit_values;
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static int use_key_regexp;
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static int do_all;
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static int do_not_match;
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static char delim = '=';
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static char key_delim = ' ';
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static char term = '\n';
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static int use_global_config, use_system_config, use_local_config;
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static struct git_config_source given_config_source;
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static int actions, types;
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static const char *get_color_slot, *get_colorbool_slot;
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static int end_null;
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static int respect_includes = -1;
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#define ACTION_GET (1<<0)
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#define ACTION_GET_ALL (1<<1)
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#define ACTION_GET_REGEXP (1<<2)
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#define ACTION_REPLACE_ALL (1<<3)
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#define ACTION_ADD (1<<4)
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#define ACTION_UNSET (1<<5)
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#define ACTION_UNSET_ALL (1<<6)
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#define ACTION_RENAME_SECTION (1<<7)
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#define ACTION_REMOVE_SECTION (1<<8)
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#define ACTION_LIST (1<<9)
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#define ACTION_EDIT (1<<10)
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#define ACTION_SET (1<<11)
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#define ACTION_SET_ALL (1<<12)
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#define ACTION_GET_COLOR (1<<13)
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#define ACTION_GET_COLORBOOL (1<<14)
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#define ACTION_GET_URLMATCH (1<<15)
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#define TYPE_BOOL (1<<0)
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#define TYPE_INT (1<<1)
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#define TYPE_BOOL_OR_INT (1<<2)
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#define TYPE_PATH (1<<3)
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static struct option builtin_config_options[] = {
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OPT_GROUP(N_("Config file location")),
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OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
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OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
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OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
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OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
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OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
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OPT_GROUP(N_("Action")),
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OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
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OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
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OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
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OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
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OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
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OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
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OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
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OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
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OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
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OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
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OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
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OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
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OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
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OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
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OPT_GROUP(N_("Type")),
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OPT_BIT(0, "bool", &types, N_("value is \"true\" or \"false\""), TYPE_BOOL),
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OPT_BIT(0, "int", &types, N_("value is decimal number"), TYPE_INT),
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OPT_BIT(0, "bool-or-int", &types, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
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OPT_BIT(0, "path", &types, N_("value is a path (file or directory name)"), TYPE_PATH),
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OPT_GROUP(N_("Other")),
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OPT_BOOL('z', "null", &end_null, N_("terminate values with NUL byte")),
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OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
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OPT_BOOL(0, "includes", &respect_includes, N_("respect include directives on lookup")),
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OPT_END(),
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};
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static void check_argc(int argc, int min, int max) {
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if (argc >= min && argc <= max)
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return;
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error("wrong number of arguments");
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usage_with_options(builtin_config_usage, builtin_config_options);
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}
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static int show_all_config(const char *key_, const char *value_, void *cb)
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{
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if (!omit_values && value_)
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printf("%s%c%s%c", key_, delim, value_, term);
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else
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printf("%s%c", key_, term);
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return 0;
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}
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struct strbuf_list {
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struct strbuf *items;
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int nr;
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int alloc;
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};
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static int format_config(struct strbuf *buf, const char *key_, const char *value_)
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{
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if (show_keys)
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strbuf_addstr(buf, key_);
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if (!omit_values) {
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if (show_keys)
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strbuf_addch(buf, key_delim);
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if (types == TYPE_INT)
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strbuf_addf(buf, "%"PRId64,
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git_config_int64(key_, value_ ? value_ : ""));
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else if (types == TYPE_BOOL)
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strbuf_addstr(buf, git_config_bool(key_, value_) ?
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"true" : "false");
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else if (types == TYPE_BOOL_OR_INT) {
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int is_bool, v;
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v = git_config_bool_or_int(key_, value_, &is_bool);
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if (is_bool)
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strbuf_addstr(buf, v ? "true" : "false");
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else
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strbuf_addf(buf, "%d", v);
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} else if (types == TYPE_PATH) {
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const char *v;
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if (git_config_pathname(&v, key_, value_) < 0)
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return -1;
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strbuf_addstr(buf, v);
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free((char *)v);
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} else if (value_) {
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strbuf_addstr(buf, value_);
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} else {
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/* Just show the key name; back out delimiter */
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if (show_keys)
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strbuf_setlen(buf, buf->len - 1);
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}
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}
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strbuf_addch(buf, term);
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return 0;
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}
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static int collect_config(const char *key_, const char *value_, void *cb)
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{
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struct strbuf_list *values = cb;
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if (!use_key_regexp && strcmp(key_, key))
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return 0;
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if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
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return 0;
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if (regexp != NULL &&
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(do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
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return 0;
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ALLOC_GROW(values->items, values->nr + 1, values->alloc);
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strbuf_init(&values->items[values->nr], 0);
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return format_config(&values->items[values->nr++], key_, value_);
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}
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static int get_value(const char *key_, const char *regex_)
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{
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int ret = CONFIG_GENERIC_ERROR;
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struct strbuf_list values = {NULL};
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int i;
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if (use_key_regexp) {
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char *tl;
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/*
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* NEEDSWORK: this naive pattern lowercasing obviously does not
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* work for more complex patterns like "^[^.]*Foo.*bar".
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* Perhaps we should deprecate this altogether someday.
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*/
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key = xstrdup(key_);
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for (tl = key + strlen(key) - 1;
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tl >= key && *tl != '.';
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tl--)
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*tl = tolower(*tl);
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for (tl = key; *tl && *tl != '.'; tl++)
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*tl = tolower(*tl);
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key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
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if (regcomp(key_regexp, key, REG_EXTENDED)) {
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error("invalid key pattern: %s", key_);
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free(key_regexp);
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key_regexp = NULL;
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ret = CONFIG_INVALID_PATTERN;
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goto free_strings;
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}
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} else {
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if (git_config_parse_key(key_, &key, NULL)) {
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ret = CONFIG_INVALID_KEY;
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goto free_strings;
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}
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}
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if (regex_) {
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if (regex_[0] == '!') {
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do_not_match = 1;
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regex_++;
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}
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regexp = (regex_t*)xmalloc(sizeof(regex_t));
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if (regcomp(regexp, regex_, REG_EXTENDED)) {
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error("invalid pattern: %s", regex_);
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free(regexp);
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regexp = NULL;
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ret = CONFIG_INVALID_PATTERN;
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goto free_strings;
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}
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}
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git_config_with_options(collect_config, &values,
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&given_config_source, respect_includes);
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ret = !values.nr;
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for (i = 0; i < values.nr; i++) {
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struct strbuf *buf = values.items + i;
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if (do_all || i == values.nr - 1)
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fwrite(buf->buf, 1, buf->len, stdout);
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strbuf_release(buf);
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}
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free(values.items);
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free_strings:
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free(key);
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if (key_regexp) {
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regfree(key_regexp);
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free(key_regexp);
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}
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if (regexp) {
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regfree(regexp);
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free(regexp);
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}
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return ret;
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}
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static char *normalize_value(const char *key, const char *value)
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{
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if (!value)
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return NULL;
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if (types == 0 || types == TYPE_PATH)
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/*
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* We don't do normalization for TYPE_PATH here: If
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* the path is like ~/foobar/, we prefer to store
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* "~/foobar/" in the config file, and to expand the ~
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* when retrieving the value.
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*/
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return xstrdup(value);
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if (types == TYPE_INT)
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return xstrfmt("%"PRId64, git_config_int64(key, value));
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if (types == TYPE_BOOL)
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return xstrdup(git_config_bool(key, value) ? "true" : "false");
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if (types == TYPE_BOOL_OR_INT) {
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int is_bool, v;
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v = git_config_bool_or_int(key, value, &is_bool);
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if (!is_bool)
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return xstrfmt("%d", v);
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else
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return xstrdup(v ? "true" : "false");
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}
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die("BUG: cannot normalize type %d", types);
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}
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static int get_color_found;
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static const char *get_color_slot;
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static const char *get_colorbool_slot;
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static char parsed_color[COLOR_MAXLEN];
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static int git_get_color_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, get_color_slot)) {
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if (!value)
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config_error_nonbool(var);
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if (color_parse(value, parsed_color) < 0)
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return -1;
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get_color_found = 1;
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}
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return 0;
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}
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static void get_color(const char *var, const char *def_color)
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{
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get_color_slot = var;
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get_color_found = 0;
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parsed_color[0] = '\0';
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git_config_with_options(git_get_color_config, NULL,
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&given_config_source, respect_includes);
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if (!get_color_found && def_color) {
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if (color_parse(def_color, parsed_color) < 0)
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die(_("unable to parse default color value"));
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}
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fputs(parsed_color, stdout);
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}
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static int get_colorbool_found;
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static int get_diff_color_found;
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static int get_color_ui_found;
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static int git_get_colorbool_config(const char *var, const char *value,
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void *cb)
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{
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if (!strcmp(var, get_colorbool_slot))
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get_colorbool_found = git_config_colorbool(var, value);
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else if (!strcmp(var, "diff.color"))
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get_diff_color_found = git_config_colorbool(var, value);
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else if (!strcmp(var, "color.ui"))
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get_color_ui_found = git_config_colorbool(var, value);
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return 0;
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}
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static int get_colorbool(const char *var, int print)
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{
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get_colorbool_slot = var;
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get_colorbool_found = -1;
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get_diff_color_found = -1;
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get_color_ui_found = -1;
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git_config_with_options(git_get_colorbool_config, NULL,
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&given_config_source, respect_includes);
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if (get_colorbool_found < 0) {
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if (!strcmp(get_colorbool_slot, "color.diff"))
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get_colorbool_found = get_diff_color_found;
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if (get_colorbool_found < 0)
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get_colorbool_found = get_color_ui_found;
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}
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if (get_colorbool_found < 0)
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/* default value if none found in config */
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get_colorbool_found = GIT_COLOR_AUTO;
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get_colorbool_found = want_color(get_colorbool_found);
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if (print) {
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printf("%s\n", get_colorbool_found ? "true" : "false");
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return 0;
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} else
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return get_colorbool_found ? 0 : 1;
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}
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static void check_write(void)
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{
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if (given_config_source.use_stdin)
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die("writing to stdin is not supported");
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if (given_config_source.blob)
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die("writing config blobs is not supported");
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}
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struct urlmatch_current_candidate_value {
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char value_is_null;
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struct strbuf value;
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};
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static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
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{
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struct string_list *values = cb;
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struct string_list_item *item = string_list_insert(values, var);
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struct urlmatch_current_candidate_value *matched = item->util;
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if (!matched) {
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matched = xmalloc(sizeof(*matched));
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strbuf_init(&matched->value, 0);
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item->util = matched;
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} else {
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strbuf_reset(&matched->value);
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}
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if (value) {
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strbuf_addstr(&matched->value, value);
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matched->value_is_null = 0;
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} else {
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matched->value_is_null = 1;
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}
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return 0;
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}
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static int get_urlmatch(const char *var, const char *url)
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{
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char *section_tail;
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struct string_list_item *item;
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struct urlmatch_config config = { STRING_LIST_INIT_DUP };
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struct string_list values = STRING_LIST_INIT_DUP;
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config.collect_fn = urlmatch_collect_fn;
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config.cascade_fn = NULL;
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config.cb = &values;
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if (!url_normalize(url, &config.url))
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die("%s", config.url.err);
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config.section = xstrdup_tolower(var);
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section_tail = strchr(config.section, '.');
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if (section_tail) {
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*section_tail = '\0';
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config.key = section_tail + 1;
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show_keys = 0;
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} else {
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config.key = NULL;
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show_keys = 1;
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}
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git_config_with_options(urlmatch_config_entry, &config,
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&given_config_source, respect_includes);
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for_each_string_list_item(item, &values) {
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struct urlmatch_current_candidate_value *matched = item->util;
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struct strbuf buf = STRBUF_INIT;
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format_config(&buf, item->string,
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matched->value_is_null ? NULL : matched->value.buf);
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fwrite(buf.buf, 1, buf.len, stdout);
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strbuf_release(&buf);
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strbuf_release(&matched->value);
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}
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string_list_clear(&config.vars, 1);
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string_list_clear(&values, 1);
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free(config.url.url);
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free((void *)config.section);
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return 0;
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}
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static char *default_user_config(void)
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{
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struct strbuf buf = STRBUF_INIT;
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strbuf_addf(&buf,
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_("# This is Git's per-user configuration file.\n"
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"[user]\n"
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"# Please adapt and uncomment the following lines:\n"
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"# name = %s\n"
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"# email = %s\n"),
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ident_default_name(),
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ident_default_email());
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return strbuf_detach(&buf, NULL);
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}
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int cmd_config(int argc, const char **argv, const char *prefix)
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{
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int nongit = !startup_info->have_repository;
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char *value;
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given_config_source.file = getenv(CONFIG_ENVIRONMENT);
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argc = parse_options(argc, argv, prefix, builtin_config_options,
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builtin_config_usage,
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PARSE_OPT_STOP_AT_NON_OPTION);
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if (use_global_config + use_system_config + use_local_config +
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!!given_config_source.file + !!given_config_source.blob > 1) {
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error("only one config file at a time.");
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|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
|
|
if (given_config_source.file &&
|
|
!strcmp(given_config_source.file, "-")) {
|
|
given_config_source.file = NULL;
|
|
given_config_source.use_stdin = 1;
|
|
}
|
|
|
|
if (use_global_config) {
|
|
char *user_config = expand_user_path("~/.gitconfig");
|
|
char *xdg_config = xdg_config_home("config");
|
|
|
|
if (!user_config)
|
|
/*
|
|
* It is unknown if HOME/.gitconfig exists, so
|
|
* we do not know if we should write to XDG
|
|
* location; error out even if XDG_CONFIG_HOME
|
|
* is set and points at a sane location.
|
|
*/
|
|
die("$HOME not set");
|
|
|
|
if (access_or_warn(user_config, R_OK, 0) &&
|
|
xdg_config && !access_or_warn(xdg_config, R_OK, 0))
|
|
given_config_source.file = xdg_config;
|
|
else
|
|
given_config_source.file = user_config;
|
|
}
|
|
else if (use_system_config)
|
|
given_config_source.file = git_etc_gitconfig();
|
|
else if (use_local_config)
|
|
given_config_source.file = git_pathdup("config");
|
|
else if (given_config_source.file) {
|
|
if (!is_absolute_path(given_config_source.file) && prefix)
|
|
given_config_source.file =
|
|
xstrdup(prefix_filename(prefix,
|
|
strlen(prefix),
|
|
given_config_source.file));
|
|
}
|
|
|
|
if (respect_includes == -1)
|
|
respect_includes = !given_config_source.file;
|
|
|
|
if (end_null) {
|
|
term = '\0';
|
|
delim = '\n';
|
|
key_delim = '\n';
|
|
}
|
|
|
|
if (HAS_MULTI_BITS(types)) {
|
|
error("only one type at a time.");
|
|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
|
|
if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && types) {
|
|
error("--get-color and variable type are incoherent");
|
|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
|
|
if (HAS_MULTI_BITS(actions)) {
|
|
error("only one action at a time.");
|
|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
if (actions == 0)
|
|
switch (argc) {
|
|
case 1: actions = ACTION_GET; break;
|
|
case 2: actions = ACTION_SET; break;
|
|
case 3: actions = ACTION_SET_ALL; break;
|
|
default:
|
|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
if (omit_values &&
|
|
!(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
|
|
error("--name-only is only applicable to --list or --get-regexp");
|
|
usage_with_options(builtin_config_usage, builtin_config_options);
|
|
}
|
|
if (actions == ACTION_LIST) {
|
|
check_argc(argc, 0, 0);
|
|
if (git_config_with_options(show_all_config, NULL,
|
|
&given_config_source,
|
|
respect_includes) < 0) {
|
|
if (given_config_source.file)
|
|
die_errno("unable to read config file '%s'",
|
|
given_config_source.file);
|
|
else
|
|
die("error processing config file(s)");
|
|
}
|
|
}
|
|
else if (actions == ACTION_EDIT) {
|
|
char *config_file;
|
|
|
|
check_argc(argc, 0, 0);
|
|
if (!given_config_source.file && nongit)
|
|
die("not in a git directory");
|
|
if (given_config_source.use_stdin)
|
|
die("editing stdin is not supported");
|
|
if (given_config_source.blob)
|
|
die("editing blobs is not supported");
|
|
git_config(git_default_config, NULL);
|
|
config_file = xstrdup(given_config_source.file ?
|
|
given_config_source.file : git_path("config"));
|
|
if (use_global_config) {
|
|
int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
|
|
if (fd) {
|
|
char *content = default_user_config();
|
|
write_str_in_full(fd, content);
|
|
free(content);
|
|
close(fd);
|
|
}
|
|
else if (errno != EEXIST)
|
|
die_errno(_("cannot create configuration file %s"), config_file);
|
|
}
|
|
launch_editor(config_file, NULL, NULL);
|
|
free(config_file);
|
|
}
|
|
else if (actions == ACTION_SET) {
|
|
int ret;
|
|
check_write();
|
|
check_argc(argc, 2, 2);
|
|
value = normalize_value(argv[0], argv[1]);
|
|
ret = git_config_set_in_file(given_config_source.file, argv[0], value);
|
|
if (ret == CONFIG_NOTHING_SET)
|
|
error("cannot overwrite multiple values with a single value\n"
|
|
" Use a regexp, --add or --replace-all to change %s.", argv[0]);
|
|
return ret;
|
|
}
|
|
else if (actions == ACTION_SET_ALL) {
|
|
check_write();
|
|
check_argc(argc, 2, 3);
|
|
value = normalize_value(argv[0], argv[1]);
|
|
return git_config_set_multivar_in_file(given_config_source.file,
|
|
argv[0], value, argv[2], 0);
|
|
}
|
|
else if (actions == ACTION_ADD) {
|
|
check_write();
|
|
check_argc(argc, 2, 2);
|
|
value = normalize_value(argv[0], argv[1]);
|
|
return git_config_set_multivar_in_file(given_config_source.file,
|
|
argv[0], value,
|
|
CONFIG_REGEX_NONE, 0);
|
|
}
|
|
else if (actions == ACTION_REPLACE_ALL) {
|
|
check_write();
|
|
check_argc(argc, 2, 3);
|
|
value = normalize_value(argv[0], argv[1]);
|
|
return git_config_set_multivar_in_file(given_config_source.file,
|
|
argv[0], value, argv[2], 1);
|
|
}
|
|
else if (actions == ACTION_GET) {
|
|
check_argc(argc, 1, 2);
|
|
return get_value(argv[0], argv[1]);
|
|
}
|
|
else if (actions == ACTION_GET_ALL) {
|
|
do_all = 1;
|
|
check_argc(argc, 1, 2);
|
|
return get_value(argv[0], argv[1]);
|
|
}
|
|
else if (actions == ACTION_GET_REGEXP) {
|
|
show_keys = 1;
|
|
use_key_regexp = 1;
|
|
do_all = 1;
|
|
check_argc(argc, 1, 2);
|
|
return get_value(argv[0], argv[1]);
|
|
}
|
|
else if (actions == ACTION_GET_URLMATCH) {
|
|
check_argc(argc, 2, 2);
|
|
return get_urlmatch(argv[0], argv[1]);
|
|
}
|
|
else if (actions == ACTION_UNSET) {
|
|
check_write();
|
|
check_argc(argc, 1, 2);
|
|
if (argc == 2)
|
|
return git_config_set_multivar_in_file(given_config_source.file,
|
|
argv[0], NULL, argv[1], 0);
|
|
else
|
|
return git_config_set_in_file(given_config_source.file,
|
|
argv[0], NULL);
|
|
}
|
|
else if (actions == ACTION_UNSET_ALL) {
|
|
check_write();
|
|
check_argc(argc, 1, 2);
|
|
return git_config_set_multivar_in_file(given_config_source.file,
|
|
argv[0], NULL, argv[1], 1);
|
|
}
|
|
else if (actions == ACTION_RENAME_SECTION) {
|
|
int ret;
|
|
check_write();
|
|
check_argc(argc, 2, 2);
|
|
ret = git_config_rename_section_in_file(given_config_source.file,
|
|
argv[0], argv[1]);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 0)
|
|
die("No such section!");
|
|
}
|
|
else if (actions == ACTION_REMOVE_SECTION) {
|
|
int ret;
|
|
check_write();
|
|
check_argc(argc, 1, 1);
|
|
ret = git_config_rename_section_in_file(given_config_source.file,
|
|
argv[0], NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 0)
|
|
die("No such section!");
|
|
}
|
|
else if (actions == ACTION_GET_COLOR) {
|
|
check_argc(argc, 1, 2);
|
|
get_color(argv[0], argv[1]);
|
|
}
|
|
else if (actions == ACTION_GET_COLORBOOL) {
|
|
check_argc(argc, 1, 2);
|
|
if (argc == 2)
|
|
color_stdout_is_tty = git_config_bool("command line", argv[1]);
|
|
return get_colorbool(argv[0], argc == 2);
|
|
}
|
|
|
|
return 0;
|
|
}
|