mirror of
https://github.com/git/git.git
synced 2024-06-09 23:26:12 +02:00
30ca07a249
When defined, this allows plumbing commands that update the index (add, apply, checkout-index, merge-recursive, mv, read-tree, rm, update-index, and write-tree) to write their resulting index to an alternative index file while holding a lock to the original index file. With this, git-commit that jumps the index does not have to make an extra copy of the index file, and more importantly, it can do the update while holding the lock on the index. However, I think the interface to let an environment variable specify the output is a mistake, as shown in the documentation. If a curious user has the environment variable set to something other than the file GIT_INDEX_FILE points at, almost everything will break. This should instead be a command line parameter to tell these plumbing commands to write the result in the named file, to prevent stupid mistakes. Signed-off-by: Junio C Hamano <junkio@cox.net>
218 lines
4.7 KiB
C
218 lines
4.7 KiB
C
/*
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* "git add" builtin command
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*
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* Copyright (C) 2006 Linus Torvalds
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "dir.h"
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#include "exec_cmd.h"
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#include "cache-tree.h"
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static const char builtin_add_usage[] =
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"git-add [-n] [-v] [-f] [--interactive | -i] [--] <filepattern>...";
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static const char *excludes_file;
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static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
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{
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char *seen;
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int i, specs;
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struct dir_entry **src, **dst;
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for (specs = 0; pathspec[specs]; specs++)
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/* nothing */;
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seen = xcalloc(specs, 1);
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src = dst = dir->entries;
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i = dir->nr;
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while (--i >= 0) {
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struct dir_entry *entry = *src++;
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if (match_pathspec(pathspec, entry->name, entry->len,
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prefix, seen))
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*dst++ = entry;
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}
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dir->nr = dst - dir->entries;
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for (i = 0; i < specs; i++) {
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struct stat st;
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const char *match;
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if (seen[i])
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continue;
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match = pathspec[i];
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if (!match[0])
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continue;
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/* Existing file? We must have ignored it */
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if (!lstat(match, &st)) {
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struct dir_entry *ent;
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ent = dir_add_name(dir, match, strlen(match));
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ent->ignored = 1;
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if (S_ISDIR(st.st_mode))
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ent->ignored_dir = 1;
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continue;
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}
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die("pathspec '%s' did not match any files", match);
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}
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}
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static void fill_directory(struct dir_struct *dir, const char **pathspec)
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{
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const char *path, *base;
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int baselen;
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/* Set up the default git porcelain excludes */
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memset(dir, 0, sizeof(*dir));
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dir->exclude_per_dir = ".gitignore";
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path = git_path("info/exclude");
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if (!access(path, R_OK))
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add_excludes_from_file(dir, path);
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if (!access(excludes_file, R_OK))
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add_excludes_from_file(dir, excludes_file);
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/*
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* Calculate common prefix for the pathspec, and
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* use that to optimize the directory walk
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*/
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baselen = common_prefix(pathspec);
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path = ".";
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base = "";
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if (baselen) {
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char *common = xmalloc(baselen + 1);
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memcpy(common, *pathspec, baselen);
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common[baselen] = 0;
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path = base = common;
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}
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/* Read the directory and prune it */
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read_directory(dir, path, base, baselen);
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if (pathspec)
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prune_directory(dir, pathspec, baselen);
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}
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static int git_add_config(const char *var, const char *value)
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{
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if (!strcmp(var, "core.excludesfile")) {
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if (!value)
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die("core.excludesfile without value");
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excludes_file = xstrdup(value);
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return 0;
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}
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return git_default_config(var, value);
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}
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static struct lock_file lock_file;
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static const char ignore_warning[] =
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"The following paths are ignored by one of your .gitignore files:\n";
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int cmd_add(int argc, const char **argv, const char *prefix)
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{
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int i, newfd;
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int verbose = 0, show_only = 0, ignored_too = 0;
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const char **pathspec;
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struct dir_struct dir;
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int add_interactive = 0;
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for (i = 1; i < argc; i++) {
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if (!strcmp("--interactive", argv[i]) ||
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!strcmp("-i", argv[i]))
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add_interactive++;
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}
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if (add_interactive) {
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const char *args[] = { "add--interactive", NULL };
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if (add_interactive != 1 || argc != 2)
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die("add --interactive does not take any parameters");
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execv_git_cmd(args);
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exit(1);
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}
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git_config(git_add_config);
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newfd = hold_locked_index(&lock_file, 1);
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (arg[0] != '-')
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break;
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if (!strcmp(arg, "--")) {
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i++;
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break;
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}
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if (!strcmp(arg, "-n")) {
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show_only = 1;
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continue;
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}
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if (!strcmp(arg, "-f")) {
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ignored_too = 1;
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continue;
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}
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if (!strcmp(arg, "-v")) {
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verbose = 1;
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continue;
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}
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usage(builtin_add_usage);
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}
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if (argc <= i) {
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fprintf(stderr, "Nothing specified, nothing added.\n");
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fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
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return 0;
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}
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pathspec = get_pathspec(prefix, argv + i);
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fill_directory(&dir, pathspec);
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if (show_only) {
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const char *sep = "", *eof = "";
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for (i = 0; i < dir.nr; i++) {
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if (!ignored_too && dir.entries[i]->ignored)
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continue;
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printf("%s%s", sep, dir.entries[i]->name);
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sep = " ";
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eof = "\n";
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}
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fputs(eof, stdout);
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return 0;
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}
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if (read_cache() < 0)
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die("index file corrupt");
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if (!ignored_too) {
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int has_ignored = 0;
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for (i = 0; i < dir.nr; i++)
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if (dir.entries[i]->ignored)
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has_ignored = 1;
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if (has_ignored) {
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fprintf(stderr, ignore_warning);
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for (i = 0; i < dir.nr; i++) {
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if (!dir.entries[i]->ignored)
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continue;
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fprintf(stderr, "%s", dir.entries[i]->name);
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if (dir.entries[i]->ignored_dir)
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fprintf(stderr, " (directory)");
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fputc('\n', stderr);
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}
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fprintf(stderr,
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"Use -f if you really want to add them.\n");
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exit(1);
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}
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}
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for (i = 0; i < dir.nr; i++)
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add_file_to_index(dir.entries[i]->name, verbose);
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if (active_cache_changed) {
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if (write_cache(newfd, active_cache, active_nr) ||
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close(newfd) || commit_locked_index(&lock_file))
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die("Unable to write new index file");
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}
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return 0;
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}
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