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synced 2024-08-24 18:26:02 +00:00
![Shawn O. Pearce](/assets/img/avatar_default.png)
The new configuration variable core.deltaBaseCacheLimit allows the user to control how much memory they are willing to give to Git for caching base objects of deltas. This is not normally meant to be a user tweakable knob; the "out of the box" settings are meant to be suitable for almost all workloads. We default to 16 MiB under the assumption that the cache is not meant to consume all of the user's available memory, and that the cache's main purpose was to cache trees, for faster path limiters during revision traversal. Since trees tend to be relatively small objects, this relatively small limit should still allow a large number of objects. On the other hand we don't want the cache to start storing 200 different versions of a 200 MiB blob, as this could easily blow the entire address space of a 32 bit process. We evict OBJ_BLOB from the cache first (credit goes to Junio) as we want to favor OBJ_TREE within the cache. These are the objects that have the highest inflate() startup penalty, as they tend to be small and thus don't have that much of a chance to ammortize that penalty over the entire data. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
961 lines
20 KiB
C
961 lines
20 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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* Copyright (C) Johannes Schindelin, 2005
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*
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*/
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#include "cache.h"
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#define MAXNAME (256)
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static FILE *config_file;
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static const char *config_file_name;
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static int config_linenr;
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static int get_next_char(void)
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{
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int c;
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FILE *f;
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c = '\n';
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if ((f = config_file) != NULL) {
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c = fgetc(f);
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if (c == '\r') {
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/* DOS like systems */
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c = fgetc(f);
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if (c != '\n') {
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ungetc(c, f);
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c = '\r';
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}
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}
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if (c == '\n')
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config_linenr++;
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if (c == EOF) {
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config_file = NULL;
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c = '\n';
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}
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}
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return c;
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}
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static char *parse_value(void)
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{
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static char value[1024];
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int quote = 0, comment = 0, len = 0, space = 0;
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for (;;) {
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int c = get_next_char();
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if (len >= sizeof(value))
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return NULL;
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if (c == '\n') {
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if (quote)
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return NULL;
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value[len] = 0;
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return value;
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}
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if (comment)
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continue;
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if (isspace(c) && !quote) {
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space = 1;
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continue;
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}
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if (!quote) {
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if (c == ';' || c == '#') {
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comment = 1;
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continue;
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}
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}
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if (space) {
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if (len)
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value[len++] = ' ';
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space = 0;
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}
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if (c == '\\') {
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c = get_next_char();
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switch (c) {
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case '\n':
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continue;
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case 't':
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c = '\t';
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break;
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case 'b':
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c = '\b';
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break;
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case 'n':
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c = '\n';
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break;
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/* Some characters escape as themselves */
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case '\\': case '"':
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break;
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/* Reject unknown escape sequences */
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default:
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return NULL;
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}
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value[len++] = c;
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continue;
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}
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if (c == '"') {
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quote = 1-quote;
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continue;
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}
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value[len++] = c;
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}
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}
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static inline int iskeychar(int c)
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{
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return isalnum(c) || c == '-';
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}
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static int get_value(config_fn_t fn, char *name, unsigned int len)
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{
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int c;
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char *value;
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/* Get the full name */
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for (;;) {
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c = get_next_char();
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if (c == EOF)
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break;
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if (!iskeychar(c))
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break;
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name[len++] = tolower(c);
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if (len >= MAXNAME)
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return -1;
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}
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name[len] = 0;
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while (c == ' ' || c == '\t')
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c = get_next_char();
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value = NULL;
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if (c != '\n') {
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if (c != '=')
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return -1;
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value = parse_value();
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if (!value)
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return -1;
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}
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return fn(name, value);
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}
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static int get_extended_base_var(char *name, int baselen, int c)
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{
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do {
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if (c == '\n')
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return -1;
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c = get_next_char();
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} while (isspace(c));
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/* We require the format to be '[base "extension"]' */
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if (c != '"')
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return -1;
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name[baselen++] = '.';
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for (;;) {
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int c = get_next_char();
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if (c == '\n')
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return -1;
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if (c == '"')
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break;
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if (c == '\\') {
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c = get_next_char();
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if (c == '\n')
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return -1;
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}
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name[baselen++] = c;
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if (baselen > MAXNAME / 2)
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return -1;
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}
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/* Final ']' */
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if (get_next_char() != ']')
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return -1;
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return baselen;
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}
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static int get_base_var(char *name)
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{
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int baselen = 0;
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for (;;) {
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int c = get_next_char();
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if (c == EOF)
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return -1;
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if (c == ']')
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return baselen;
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if (isspace(c))
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return get_extended_base_var(name, baselen, c);
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if (!iskeychar(c) && c != '.')
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return -1;
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if (baselen > MAXNAME / 2)
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return -1;
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name[baselen++] = tolower(c);
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}
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}
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static int git_parse_file(config_fn_t fn)
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{
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int comment = 0;
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int baselen = 0;
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static char var[MAXNAME];
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for (;;) {
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int c = get_next_char();
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if (c == '\n') {
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/* EOF? */
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if (!config_file)
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return 0;
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comment = 0;
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continue;
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}
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if (comment || isspace(c))
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continue;
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if (c == '#' || c == ';') {
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comment = 1;
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continue;
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}
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if (c == '[') {
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baselen = get_base_var(var);
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if (baselen <= 0)
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break;
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var[baselen++] = '.';
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var[baselen] = 0;
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continue;
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}
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if (!isalpha(c))
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break;
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var[baselen] = tolower(c);
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if (get_value(fn, var, baselen+1) < 0)
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break;
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}
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die("bad config file line %d in %s", config_linenr, config_file_name);
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}
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int git_config_int(const char *name, const char *value)
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{
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if (value && *value) {
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char *end;
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int val = strtol(value, &end, 0);
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if (!*end)
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return val;
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if (!strcasecmp(end, "k"))
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return val * 1024;
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if (!strcasecmp(end, "m"))
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return val * 1024 * 1024;
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if (!strcasecmp(end, "g"))
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return val * 1024 * 1024 * 1024;
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}
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die("bad config value for '%s' in %s", name, config_file_name);
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}
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int git_config_bool(const char *name, const char *value)
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{
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if (!value)
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return 1;
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if (!*value)
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return 0;
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if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
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return 1;
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if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
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return 0;
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return git_config_int(name, value) != 0;
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}
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int git_default_config(const char *var, const char *value)
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{
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/* This needs a better name */
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if (!strcmp(var, "core.filemode")) {
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trust_executable_bit = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.symlinks")) {
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has_symlinks = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.bare")) {
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is_bare_repository_cfg = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.ignorestat")) {
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assume_unchanged = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.prefersymlinkrefs")) {
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prefer_symlink_refs = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.logallrefupdates")) {
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log_all_ref_updates = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.warnambiguousrefs")) {
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warn_ambiguous_refs = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.legacyheaders")) {
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use_legacy_headers = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "core.compression")) {
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int level = git_config_int(var, value);
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if (level == -1)
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level = Z_DEFAULT_COMPRESSION;
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else if (level < 0 || level > Z_BEST_COMPRESSION)
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die("bad zlib compression level %d", level);
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zlib_compression_level = level;
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return 0;
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}
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if (!strcmp(var, "core.packedgitwindowsize")) {
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int pgsz_x2 = getpagesize() * 2;
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packed_git_window_size = git_config_int(var, value);
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/* This value must be multiple of (pagesize * 2) */
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packed_git_window_size /= pgsz_x2;
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if (packed_git_window_size < 1)
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packed_git_window_size = 1;
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packed_git_window_size *= pgsz_x2;
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return 0;
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}
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if (!strcmp(var, "core.packedgitlimit")) {
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packed_git_limit = git_config_int(var, value);
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return 0;
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}
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if (!strcmp(var, "core.deltabasecachelimit")) {
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delta_base_cache_limit = git_config_int(var, value);
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return 0;
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}
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if (!strcmp(var, "core.autocrlf")) {
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if (value && !strcasecmp(value, "input")) {
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auto_crlf = -1;
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return 0;
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}
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auto_crlf = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "user.name")) {
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strlcpy(git_default_name, value, sizeof(git_default_name));
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return 0;
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}
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if (!strcmp(var, "user.email")) {
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strlcpy(git_default_email, value, sizeof(git_default_email));
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return 0;
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}
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if (!strcmp(var, "i18n.commitencoding")) {
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git_commit_encoding = xstrdup(value);
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return 0;
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}
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if (!strcmp(var, "i18n.logoutputencoding")) {
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git_log_output_encoding = xstrdup(value);
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return 0;
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}
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if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
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pager_use_color = git_config_bool(var,value);
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return 0;
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}
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/* Add other config variables here and to Documentation/config.txt. */
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return 0;
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}
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int git_config_from_file(config_fn_t fn, const char *filename)
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{
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int ret;
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FILE *f = fopen(filename, "r");
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ret = -1;
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if (f) {
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config_file = f;
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config_file_name = filename;
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config_linenr = 1;
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ret = git_parse_file(fn);
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fclose(f);
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config_file_name = NULL;
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}
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return ret;
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}
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int git_config(config_fn_t fn)
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{
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int ret = 0;
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char *repo_config = NULL;
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const char *home = NULL, *filename;
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/* $GIT_CONFIG makes git read _only_ the given config file,
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* $GIT_CONFIG_LOCAL will make it process it in addition to the
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* global config file, the same way it would the per-repository
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* config file otherwise. */
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filename = getenv(CONFIG_ENVIRONMENT);
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if (!filename) {
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if (!access(ETC_GITCONFIG, R_OK))
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ret += git_config_from_file(fn, ETC_GITCONFIG);
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home = getenv("HOME");
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filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
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if (!filename)
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filename = repo_config = xstrdup(git_path("config"));
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}
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if (home) {
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char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
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if (!access(user_config, R_OK))
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ret = git_config_from_file(fn, user_config);
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free(user_config);
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}
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ret += git_config_from_file(fn, filename);
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free(repo_config);
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return ret;
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}
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/*
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* Find all the stuff for git_config_set() below.
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*/
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#define MAX_MATCHES 512
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static struct {
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int baselen;
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char* key;
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int do_not_match;
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regex_t* value_regex;
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int multi_replace;
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size_t offset[MAX_MATCHES];
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enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
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int seen;
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} store;
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static int matches(const char* key, const char* value)
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{
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return !strcmp(key, store.key) &&
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(store.value_regex == NULL ||
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(store.do_not_match ^
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!regexec(store.value_regex, value, 0, NULL, 0)));
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}
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static int store_aux(const char* key, const char* value)
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{
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switch (store.state) {
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case KEY_SEEN:
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if (matches(key, value)) {
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if (store.seen == 1 && store.multi_replace == 0) {
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fprintf(stderr,
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"Warning: %s has multiple values\n",
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key);
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} else if (store.seen >= MAX_MATCHES) {
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fprintf(stderr, "Too many matches\n");
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return 1;
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}
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store.offset[store.seen] = ftell(config_file);
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store.seen++;
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}
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break;
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case SECTION_SEEN:
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if (strncmp(key, store.key, store.baselen+1)) {
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store.state = SECTION_END_SEEN;
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break;
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} else
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/* do not increment matches: this is no match */
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store.offset[store.seen] = ftell(config_file);
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/* fallthru */
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case SECTION_END_SEEN:
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case START:
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if (matches(key, value)) {
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store.offset[store.seen] = ftell(config_file);
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store.state = KEY_SEEN;
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store.seen++;
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} else {
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if (strrchr(key, '.') - key == store.baselen &&
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!strncmp(key, store.key, store.baselen)) {
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store.state = SECTION_SEEN;
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store.offset[store.seen] = ftell(config_file);
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}
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}
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}
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return 0;
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}
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|
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static int write_error()
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{
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fprintf(stderr, "Failed to write new configuration file\n");
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|
|
/* Same error code as "failed to rename". */
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return 4;
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}
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|
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static int store_write_section(int fd, const char* key)
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|
{
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const char *dot = strchr(key, '.');
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int len1 = store.baselen, len2 = -1;
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|
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dot = strchr(key, '.');
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if (dot) {
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int dotlen = dot - key;
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if (dotlen < len1) {
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len2 = len1 - dotlen - 1;
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len1 = dotlen;
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}
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}
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|
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if (write_in_full(fd, "[", 1) != 1 ||
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write_in_full(fd, key, len1) != len1)
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return 0;
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|
if (len2 >= 0) {
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|
if (write_in_full(fd, " \"", 2) != 2)
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|
return 0;
|
|
while (--len2 >= 0) {
|
|
unsigned char c = *++dot;
|
|
if (c == '"')
|
|
if (write_in_full(fd, "\\", 1) != 1)
|
|
return 0;
|
|
if (write_in_full(fd, &c, 1) != 1)
|
|
return 0;
|
|
}
|
|
if (write_in_full(fd, "\"", 1) != 1)
|
|
return 0;
|
|
}
|
|
if (write_in_full(fd, "]\n", 2) != 2)
|
|
return 0;
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|
|
return 1;
|
|
}
|
|
|
|
static int store_write_pair(int fd, const char* key, const char* value)
|
|
{
|
|
int i;
|
|
int length = strlen(key+store.baselen+1);
|
|
int quote = 0;
|
|
|
|
/* Check to see if the value needs to be quoted. */
|
|
if (value[0] == ' ')
|
|
quote = 1;
|
|
for (i = 0; value[i]; i++)
|
|
if (value[i] == ';' || value[i] == '#')
|
|
quote = 1;
|
|
if (value[i-1] == ' ')
|
|
quote = 1;
|
|
|
|
if (write_in_full(fd, "\t", 1) != 1 ||
|
|
write_in_full(fd, key+store.baselen+1, length) != length ||
|
|
write_in_full(fd, " = ", 3) != 3)
|
|
return 0;
|
|
if (quote && write_in_full(fd, "\"", 1) != 1)
|
|
return 0;
|
|
for (i = 0; value[i]; i++)
|
|
switch (value[i]) {
|
|
case '\n':
|
|
if (write_in_full(fd, "\\n", 2) != 2)
|
|
return 0;
|
|
break;
|
|
case '\t':
|
|
if (write_in_full(fd, "\\t", 2) != 2)
|
|
return 0;
|
|
break;
|
|
case '"':
|
|
case '\\':
|
|
if (write_in_full(fd, "\\", 1) != 1)
|
|
return 0;
|
|
default:
|
|
if (write_in_full(fd, value+i, 1) != 1)
|
|
return 0;
|
|
break;
|
|
}
|
|
if (quote && write_in_full(fd, "\"", 1) != 1)
|
|
return 0;
|
|
if (write_in_full(fd, "\n", 1) != 1)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static ssize_t find_beginning_of_line(const char* contents, size_t size,
|
|
size_t offset_, int* found_bracket)
|
|
{
|
|
size_t equal_offset = size, bracket_offset = size;
|
|
ssize_t offset;
|
|
|
|
for (offset = offset_-2; offset > 0
|
|
&& contents[offset] != '\n'; offset--)
|
|
switch (contents[offset]) {
|
|
case '=': equal_offset = offset; break;
|
|
case ']': bracket_offset = offset; break;
|
|
}
|
|
if (bracket_offset < equal_offset) {
|
|
*found_bracket = 1;
|
|
offset = bracket_offset+1;
|
|
} else
|
|
offset++;
|
|
|
|
return offset;
|
|
}
|
|
|
|
int git_config_set(const char* key, const char* value)
|
|
{
|
|
return git_config_set_multivar(key, value, NULL, 0);
|
|
}
|
|
|
|
/*
|
|
* If value==NULL, unset in (remove from) config,
|
|
* if value_regex!=NULL, disregard key/value pairs where value does not match.
|
|
* if multi_replace==0, nothing, or only one matching key/value is replaced,
|
|
* else all matching key/values (regardless how many) are removed,
|
|
* before the new pair is written.
|
|
*
|
|
* Returns 0 on success.
|
|
*
|
|
* This function does this:
|
|
*
|
|
* - it locks the config file by creating ".git/config.lock"
|
|
*
|
|
* - it then parses the config using store_aux() as validator to find
|
|
* the position on the key/value pair to replace. If it is to be unset,
|
|
* it must be found exactly once.
|
|
*
|
|
* - the config file is mmap()ed and the part before the match (if any) is
|
|
* written to the lock file, then the changed part and the rest.
|
|
*
|
|
* - the config file is removed and the lock file rename()d to it.
|
|
*
|
|
*/
|
|
int git_config_set_multivar(const char* key, const char* value,
|
|
const char* value_regex, int multi_replace)
|
|
{
|
|
int i, dot;
|
|
int fd = -1, in_fd;
|
|
int ret;
|
|
char* config_filename;
|
|
char* lock_file;
|
|
const char* last_dot = strrchr(key, '.');
|
|
|
|
config_filename = getenv(CONFIG_ENVIRONMENT);
|
|
if (!config_filename) {
|
|
config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
|
|
if (!config_filename)
|
|
config_filename = git_path("config");
|
|
}
|
|
config_filename = xstrdup(config_filename);
|
|
lock_file = xstrdup(mkpath("%s.lock", config_filename));
|
|
|
|
/*
|
|
* 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) {
|
|
fprintf(stderr, "key does not contain a section: %s\n", key);
|
|
ret = 2;
|
|
goto out_free;
|
|
}
|
|
store.baselen = last_dot - key;
|
|
|
|
store.multi_replace = multi_replace;
|
|
|
|
/*
|
|
* Validate the key and while at it, lower case it for matching.
|
|
*/
|
|
store.key = xmalloc(strlen(key) + 1);
|
|
dot = 0;
|
|
for (i = 0; key[i]; i++) {
|
|
unsigned char c = key[i];
|
|
if (c == '.')
|
|
dot = 1;
|
|
/* Leave the extended basename untouched.. */
|
|
if (!dot || i > store.baselen) {
|
|
if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
|
|
fprintf(stderr, "invalid key: %s\n", key);
|
|
free(store.key);
|
|
ret = 1;
|
|
goto out_free;
|
|
}
|
|
c = tolower(c);
|
|
} else if (c == '\n') {
|
|
fprintf(stderr, "invalid key (newline): %s\n", key);
|
|
free(store.key);
|
|
ret = 1;
|
|
goto out_free;
|
|
}
|
|
store.key[i] = c;
|
|
}
|
|
store.key[i] = 0;
|
|
|
|
/*
|
|
* The lock_file serves a purpose in addition to locking: the new
|
|
* contents of .git/config will be written into it.
|
|
*/
|
|
fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
|
|
if (fd < 0 || adjust_shared_perm(lock_file)) {
|
|
fprintf(stderr, "could not lock config file\n");
|
|
free(store.key);
|
|
ret = -1;
|
|
goto out_free;
|
|
}
|
|
|
|
/*
|
|
* If .git/config does not exist yet, write a minimal version.
|
|
*/
|
|
in_fd = open(config_filename, O_RDONLY);
|
|
if ( in_fd < 0 ) {
|
|
free(store.key);
|
|
|
|
if ( ENOENT != errno ) {
|
|
error("opening %s: %s", config_filename,
|
|
strerror(errno));
|
|
ret = 3; /* same as "invalid config file" */
|
|
goto out_free;
|
|
}
|
|
/* if nothing to unset, error out */
|
|
if (value == NULL) {
|
|
ret = 5;
|
|
goto out_free;
|
|
}
|
|
|
|
store.key = (char*)key;
|
|
if (!store_write_section(fd, key) ||
|
|
!store_write_pair(fd, key, value))
|
|
goto write_err_out;
|
|
} else {
|
|
struct stat st;
|
|
char* contents;
|
|
size_t contents_sz, copy_begin, copy_end;
|
|
int i, new_line = 0;
|
|
|
|
if (value_regex == NULL)
|
|
store.value_regex = NULL;
|
|
else {
|
|
if (value_regex[0] == '!') {
|
|
store.do_not_match = 1;
|
|
value_regex++;
|
|
} else
|
|
store.do_not_match = 0;
|
|
|
|
store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
|
|
if (regcomp(store.value_regex, value_regex,
|
|
REG_EXTENDED)) {
|
|
fprintf(stderr, "Invalid pattern: %s\n",
|
|
value_regex);
|
|
free(store.value_regex);
|
|
ret = 6;
|
|
goto out_free;
|
|
}
|
|
}
|
|
|
|
store.offset[0] = 0;
|
|
store.state = START;
|
|
store.seen = 0;
|
|
|
|
/*
|
|
* After this, store.offset will contain the *end* offset
|
|
* of the last match, or remain at 0 if no match was found.
|
|
* As a side effect, we make sure to transform only a valid
|
|
* existing config file.
|
|
*/
|
|
if (git_config_from_file(store_aux, config_filename)) {
|
|
fprintf(stderr, "invalid config file\n");
|
|
free(store.key);
|
|
if (store.value_regex != NULL) {
|
|
regfree(store.value_regex);
|
|
free(store.value_regex);
|
|
}
|
|
ret = 3;
|
|
goto out_free;
|
|
}
|
|
|
|
free(store.key);
|
|
if (store.value_regex != NULL) {
|
|
regfree(store.value_regex);
|
|
free(store.value_regex);
|
|
}
|
|
|
|
/* if nothing to unset, or too many matches, error out */
|
|
if ((store.seen == 0 && value == NULL) ||
|
|
(store.seen > 1 && multi_replace == 0)) {
|
|
ret = 5;
|
|
goto out_free;
|
|
}
|
|
|
|
fstat(in_fd, &st);
|
|
contents_sz = xsize_t(st.st_size);
|
|
contents = xmmap(NULL, contents_sz, PROT_READ,
|
|
MAP_PRIVATE, in_fd, 0);
|
|
close(in_fd);
|
|
|
|
if (store.seen == 0)
|
|
store.seen = 1;
|
|
|
|
for (i = 0, copy_begin = 0; i < store.seen; i++) {
|
|
if (store.offset[i] == 0) {
|
|
store.offset[i] = copy_end = contents_sz;
|
|
} else if (store.state != KEY_SEEN) {
|
|
copy_end = store.offset[i];
|
|
} else
|
|
copy_end = find_beginning_of_line(
|
|
contents, contents_sz,
|
|
store.offset[i]-2, &new_line);
|
|
|
|
/* write the first part of the config */
|
|
if (copy_end > copy_begin) {
|
|
if (write_in_full(fd, contents + copy_begin,
|
|
copy_end - copy_begin) <
|
|
copy_end - copy_begin)
|
|
goto write_err_out;
|
|
if (new_line &&
|
|
write_in_full(fd, "\n", 1) != 1)
|
|
goto write_err_out;
|
|
}
|
|
copy_begin = store.offset[i];
|
|
}
|
|
|
|
/* write the pair (value == NULL means unset) */
|
|
if (value != NULL) {
|
|
if (store.state == START) {
|
|
if (!store_write_section(fd, key))
|
|
goto write_err_out;
|
|
}
|
|
if (!store_write_pair(fd, key, value))
|
|
goto write_err_out;
|
|
}
|
|
|
|
/* write the rest of the config */
|
|
if (copy_begin < contents_sz)
|
|
if (write_in_full(fd, contents + copy_begin,
|
|
contents_sz - copy_begin) <
|
|
contents_sz - copy_begin)
|
|
goto write_err_out;
|
|
|
|
munmap(contents, contents_sz);
|
|
unlink(config_filename);
|
|
}
|
|
|
|
if (rename(lock_file, config_filename) < 0) {
|
|
fprintf(stderr, "Could not rename the lock file?\n");
|
|
ret = 4;
|
|
goto out_free;
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out_free:
|
|
if (0 <= fd)
|
|
close(fd);
|
|
free(config_filename);
|
|
if (lock_file) {
|
|
unlink(lock_file);
|
|
free(lock_file);
|
|
}
|
|
return ret;
|
|
|
|
write_err_out:
|
|
ret = write_error();
|
|
goto out_free;
|
|
|
|
}
|
|
|
|
static int section_name_match (const char *buf, const char *name)
|
|
{
|
|
int i = 0, j = 0, dot = 0;
|
|
for (; buf[i] && buf[i] != ']'; i++) {
|
|
if (!dot && isspace(buf[i])) {
|
|
dot = 1;
|
|
if (name[j++] != '.')
|
|
break;
|
|
for (i++; isspace(buf[i]); i++)
|
|
; /* do nothing */
|
|
if (buf[i] != '"')
|
|
break;
|
|
continue;
|
|
}
|
|
if (buf[i] == '\\' && dot)
|
|
i++;
|
|
else if (buf[i] == '"' && dot) {
|
|
for (i++; isspace(buf[i]); i++)
|
|
; /* do_nothing */
|
|
break;
|
|
}
|
|
if (buf[i] != name[j++])
|
|
break;
|
|
}
|
|
return (buf[i] == ']' && name[j] == 0);
|
|
}
|
|
|
|
/* if new_name == NULL, the section is removed instead */
|
|
int git_config_rename_section(const char *old_name, const char *new_name)
|
|
{
|
|
int ret = 0, remove = 0;
|
|
char *config_filename;
|
|
struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
|
|
int out_fd;
|
|
char buf[1024];
|
|
|
|
config_filename = getenv(CONFIG_ENVIRONMENT);
|
|
if (!config_filename) {
|
|
config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
|
|
if (!config_filename)
|
|
config_filename = git_path("config");
|
|
}
|
|
config_filename = xstrdup(config_filename);
|
|
out_fd = hold_lock_file_for_update(lock, config_filename, 0);
|
|
if (out_fd < 0) {
|
|
ret = error("Could not lock config file!");
|
|
goto out;
|
|
}
|
|
|
|
if (!(config_file = fopen(config_filename, "rb"))) {
|
|
ret = error("Could not open config file!");
|
|
goto out;
|
|
}
|
|
|
|
while (fgets(buf, sizeof(buf), config_file)) {
|
|
int i;
|
|
int length;
|
|
for (i = 0; buf[i] && isspace(buf[i]); i++)
|
|
; /* do nothing */
|
|
if (buf[i] == '[') {
|
|
/* it's a section */
|
|
if (section_name_match (&buf[i+1], old_name)) {
|
|
ret++;
|
|
if (new_name == NULL) {
|
|
remove = 1;
|
|
continue;
|
|
}
|
|
store.baselen = strlen(new_name);
|
|
if (!store_write_section(out_fd, new_name)) {
|
|
ret = write_error();
|
|
goto out;
|
|
}
|
|
continue;
|
|
}
|
|
remove = 0;
|
|
}
|
|
if (remove)
|
|
continue;
|
|
length = strlen(buf);
|
|
if (write_in_full(out_fd, buf, length) != length) {
|
|
ret = write_error();
|
|
goto out;
|
|
}
|
|
}
|
|
fclose(config_file);
|
|
if (close(out_fd) || commit_lock_file(lock) < 0)
|
|
ret = error("Cannot commit config file!");
|
|
out:
|
|
free(config_filename);
|
|
return ret;
|
|
}
|
|
|