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![Linus Torvalds](/assets/img/avatar_default.png)
First try. Let's see how well this works. In many ways, the hard parts of "git commit" are not so different from this, and a builtin commit would share a lot of the code, I think. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
229 lines
4.7 KiB
C
229 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 <fnmatch.h>
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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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static const char builtin_add_usage[] =
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"git-add [-n] [-v] <filepattern>...";
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static int common_prefix(const char **pathspec)
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{
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const char *path, *slash, *next;
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int prefix;
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if (!pathspec)
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return 0;
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path = *pathspec;
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slash = strrchr(path, '/');
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if (!slash)
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return 0;
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prefix = slash - path + 1;
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while ((next = *++pathspec) != NULL) {
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int len = strlen(next);
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if (len >= prefix && !memcmp(path, next, len))
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continue;
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for (;;) {
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if (!len)
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return 0;
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if (next[--len] != '/')
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continue;
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if (memcmp(path, next, len+1))
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continue;
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prefix = len + 1;
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break;
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}
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}
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return prefix;
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}
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static int match(const char **pathspec, const char *name, int namelen, int prefix)
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{
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const char *match;
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name += prefix;
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namelen -= prefix;
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while ((match = *pathspec++) != NULL) {
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int matchlen;
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match += prefix;
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matchlen = strlen(match);
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if (!matchlen)
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return 1;
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if (!strncmp(match, name, matchlen)) {
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if (match[matchlen-1] == '/')
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return 1;
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switch (name[matchlen]) {
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case '/': case '\0':
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return 1;
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}
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}
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if (!fnmatch(match, name, 0))
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return 1;
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}
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return 0;
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}
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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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int i;
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struct dir_entry **src, **dst;
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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, entry->name, entry->len, prefix)) {
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free(entry);
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continue;
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}
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*dst++ = entry;
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}
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dir->nr = dst - dir->entries;
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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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/*
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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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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 add_file_to_index(const char *path, int verbose)
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{
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int size, namelen;
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struct stat st;
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struct cache_entry *ce;
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if (lstat(path, &st))
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die("%s: unable to stat (%s)", path, strerror(errno));
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if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
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die("%s: can only add regular files or symbolic links", path);
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namelen = strlen(path);
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size = cache_entry_size(namelen);
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ce = xcalloc(1, size);
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memcpy(ce->name, path, namelen);
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ce->ce_flags = htons(namelen);
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fill_stat_cache_info(ce, &st);
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ce->ce_mode = create_ce_mode(st.st_mode);
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if (!trust_executable_bit) {
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/* If there is an existing entry, pick the mode bits
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* from it.
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*/
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int pos = cache_name_pos(path, namelen);
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if (pos >= 0)
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ce->ce_mode = active_cache[pos]->ce_mode;
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}
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if (index_path(ce->sha1, path, &st, 1))
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die("unable to index file %s", path);
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if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD))
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die("unable to add %s to index",path);
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if (verbose)
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printf("add '%s'\n", path);
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return 0;
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}
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static struct cache_file cache_file;
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int cmd_add(int argc, const char **argv, char **envp)
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{
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int i, newfd;
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int verbose = 0, show_only = 0;
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const char *prefix = setup_git_directory();
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const char **pathspec;
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struct dir_struct dir;
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git_config(git_default_config);
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newfd = hold_index_file_for_update(&cache_file, get_index_file());
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if (newfd < 0)
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die("unable to create new cachefile");
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if (read_cache() < 0)
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die("index file corrupt");
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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, "-v")) {
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verbose = 1;
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continue;
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}
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die(builtin_add_usage);
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}
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git_config(git_default_config);
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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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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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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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commit_index_file(&cache_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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