#include "cache.h"
#include "strbuf.h"
#include "quote.h"
+#include "cache-tree.h"
+#include "tree-walk.h"
/*
* Default to not allowing changes to the list of files. The
static int allow_add;
static int allow_remove;
static int allow_replace;
-static int allow_unmerged; /* --refresh needing merge is not error */
-static int not_new; /* --refresh not having working tree files is not error */
-static int quiet; /* --refresh needing update is not error */
static int info_only;
static int force_remove;
static int verbose;
-
-/* Three functions to allow overloaded pointer return; see linux/err.h */
-static inline void *ERR_PTR(long error)
-{
- return (void *) error;
-}
-
-static inline long PTR_ERR(const void *ptr)
-{
- return (long) ptr;
-}
-
-static inline long IS_ERR(const void *ptr)
-{
- return (unsigned long)ptr > (unsigned long)-1000L;
-}
+static int mark_valid_only = 0;
+#define MARK_VALID 1
+#define UNMARK_VALID 2
static void report(const char *fmt, ...)
{
va_end(vp);
}
+static int mark_valid(const char *path)
+{
+ int namelen = strlen(path);
+ int pos = cache_name_pos(path, namelen);
+ if (0 <= pos) {
+ switch (mark_valid_only) {
+ case MARK_VALID:
+ active_cache[pos]->ce_flags |= htons(CE_VALID);
+ break;
+ case UNMARK_VALID:
+ active_cache[pos]->ce_flags &= ~htons(CE_VALID);
+ break;
+ }
+ cache_tree_invalidate_path(active_cache_tree, path);
+ active_cache_changed = 1;
+ return 0;
+ }
+ return -1;
+}
+
static int add_file_to_cache(const char *path)
{
int size, namelen, option, status;
struct stat st;
status = lstat(path, &st);
+
+ /* We probably want to do this in remove_file_from_cache() and
+ * add_cache_entry() instead...
+ */
+ cache_tree_invalidate_path(active_cache_tree, path);
+
if (status < 0 || S_ISDIR(st.st_mode)) {
/* When we used to have "path" and now we want to add
* "path/file", we need a way to remove "path" before
namelen = strlen(path);
size = cache_entry_size(namelen);
- ce = xmalloc(size);
- memset(ce, 0, size);
+ ce = xcalloc(1, size);
memcpy(ce->name, path, namelen);
+ ce->ce_flags = htons(namelen);
fill_stat_cache_info(ce, &st);
ce->ce_mode = create_ce_mode(st.st_mode);
if (0 <= pos)
ce->ce_mode = active_cache[pos]->ce_mode;
}
- ce->ce_flags = htons(namelen);
if (index_path(ce->sha1, path, &st, !info_only))
return -1;
return 0;
}
-/*
- * "refresh" does not calculate a new sha1 file or bring the
- * cache up-to-date for mode/content changes. But what it
- * _does_ do is to "re-match" the stat information of a file
- * with the cache, so that you can refresh the cache for a
- * file that hasn't been changed but where the stat entry is
- * out of date.
- *
- * For example, you'd want to do this after doing a "git-read-tree",
- * to link up the stat cache details with the proper files.
- */
-static struct cache_entry *refresh_entry(struct cache_entry *ce)
-{
- struct stat st;
- struct cache_entry *updated;
- int changed, size;
-
- if (lstat(ce->name, &st) < 0)
- return ERR_PTR(-errno);
-
- changed = ce_match_stat(ce, &st);
- if (!changed)
- return NULL;
-
- if (ce_modified(ce, &st))
- return ERR_PTR(-EINVAL);
-
- size = ce_size(ce);
- updated = xmalloc(size);
- memcpy(updated, ce, size);
- fill_stat_cache_info(updated, &st);
- return updated;
-}
-
-static int refresh_cache(void)
-{
- int i;
- int has_errors = 0;
-
- for (i = 0; i < active_nr; i++) {
- struct cache_entry *ce, *new;
- ce = active_cache[i];
- if (ce_stage(ce)) {
- while ((i < active_nr) &&
- ! strcmp(active_cache[i]->name, ce->name))
- i++;
- i--;
- if (allow_unmerged)
- continue;
- printf("%s: needs merge\n", ce->name);
- has_errors = 1;
- continue;
- }
-
- new = refresh_entry(ce);
- if (!new)
- continue;
- if (IS_ERR(new)) {
- if (not_new && PTR_ERR(new) == -ENOENT)
- continue;
- if (quiet)
- continue;
- printf("%s: needs update\n", ce->name);
- has_errors = 1;
- continue;
- }
- active_cache_changed = 1;
- /* You can NOT just free active_cache[i] here, since it
- * might not be necessarily malloc()ed but can also come
- * from mmap(). */
- active_cache[i] = new;
- }
- return has_errors;
-}
-
-/*
- * We fundamentally don't like some paths: we don't want
- * dot or dot-dot anywhere, and for obvious reasons don't
- * want to recurse into ".git" either.
- *
- * Also, we don't want double slashes or slashes at the
- * end that can make pathnames ambiguous.
- */
-static int verify_dotfile(const char *rest)
-{
- /*
- * The first character was '.', but that
- * has already been discarded, we now test
- * the rest.
- */
- switch (*rest) {
- /* "." is not allowed */
- case '\0': case '/':
- return 0;
-
- /*
- * ".git" followed by NUL or slash is bad. This
- * shares the path end test with the ".." case.
- */
- case 'g':
- if (rest[1] != 'i')
- break;
- if (rest[2] != 't')
- break;
- rest += 2;
- /* fallthrough */
- case '.':
- if (rest[1] == '\0' || rest[1] == '/')
- return 0;
- }
- return 1;
-}
-
-static int verify_path(const char *path)
-{
- char c;
-
- goto inside;
- for (;;) {
- if (!c)
- return 1;
- if (c == '/') {
-inside:
- c = *path++;
- switch (c) {
- default:
- continue;
- case '/': case '\0':
- break;
- case '.':
- if (verify_dotfile(path))
- continue;
- }
- return 0;
- }
- c = *path++;
- }
-}
-
-static int add_cacheinfo(const char *arg1, const char *arg2, const char *arg3)
+static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
+ const char *path, int stage)
{
int size, len, option;
- unsigned int mode;
- unsigned char sha1[20];
struct cache_entry *ce;
- if (sscanf(arg1, "%o", &mode) != 1)
- return -1;
- if (get_sha1_hex(arg2, sha1))
- return -1;
- if (!verify_path(arg3))
+ if (!verify_path(path))
return -1;
- len = strlen(arg3);
+ len = strlen(path);
size = cache_entry_size(len);
- ce = xmalloc(size);
- memset(ce, 0, size);
+ ce = xcalloc(1, size);
memcpy(ce->sha1, sha1, 20);
- memcpy(ce->name, arg3, len);
- ce->ce_flags = htons(len);
+ memcpy(ce->name, path, len);
+ ce->ce_flags = create_ce_flags(len, stage);
ce->ce_mode = create_ce_mode(mode);
+ if (assume_unchanged)
+ ce->ce_flags |= htons(CE_VALID);
option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
if (add_cache_entry(ce, option))
return error("%s: cannot add to the index - missing --add option?",
- arg3);
- report("add '%s'", arg3);
+ path);
+ report("add '%s'", path);
+ cache_tree_invalidate_path(active_cache_tree, path);
return 0;
}
-static int chmod_path(int flip, const char *path)
+static void chmod_path(int flip, const char *path)
{
int pos;
struct cache_entry *ce;
pos = cache_name_pos(path, strlen(path));
if (pos < 0)
- return -1;
+ goto fail;
ce = active_cache[pos];
mode = ntohl(ce->ce_mode);
if (!S_ISREG(mode))
- return -1;
+ goto fail;
switch (flip) {
case '+':
ce->ce_mode |= htonl(0111); break;
case '-':
ce->ce_mode &= htonl(~0111); break;
default:
- return -1;
+ goto fail;
}
+ cache_tree_invalidate_path(active_cache_tree, path);
active_cache_changed = 1;
- return 0;
+ report("chmod %cx '%s'", flip, path);
+ return;
+ fail:
+ die("git-update-index: cannot chmod %cx '%s'", flip, path);
}
-static struct cache_file cache_file;
+static struct lock_file lock_file;
static void update_one(const char *path, const char *prefix, int prefix_length)
{
const char *p = prefix_path(prefix, prefix_length, path);
if (!verify_path(p)) {
fprintf(stderr, "Ignoring path %s\n", path);
- return;
+ goto free_return;
+ }
+ if (mark_valid_only) {
+ if (mark_valid(p))
+ die("Unable to mark file %s", path);
+ goto free_return;
}
+ cache_tree_invalidate_path(active_cache_tree, path);
+
if (force_remove) {
if (remove_file_from_cache(p))
die("git-update-index: unable to remove %s", path);
report("remove '%s'", path);
- return;
+ goto free_return;
}
if (add_file_to_cache(p))
die("Unable to process file %s", path);
report("add '%s'", path);
+ free_return:
+ if (p < path || p > path + strlen(path))
+ free((char*)p);
}
static void read_index_info(int line_termination)
struct strbuf buf;
strbuf_init(&buf);
while (1) {
- char *ptr;
+ char *ptr, *tab;
char *path_name;
unsigned char sha1[20];
unsigned int mode;
-
+ int stage;
+
+ /* This reads lines formatted in one of three formats:
+ *
+ * (1) mode SP sha1 TAB path
+ * The first format is what "git-apply --index-info"
+ * reports, and used to reconstruct a partial tree
+ * that is used for phony merge base tree when falling
+ * back on 3-way merge.
+ *
+ * (2) mode SP type SP sha1 TAB path
+ * The second format is to stuff git-ls-tree output
+ * into the index file.
+ *
+ * (3) mode SP sha1 SP stage TAB path
+ * This format is to put higher order stages into the
+ * index file and matches git-ls-files --stage output.
+ */
read_line(&buf, stdin, line_termination);
if (buf.eof)
break;
mode = strtoul(buf.buf, &ptr, 8);
- if (ptr == buf.buf || *ptr != ' ' ||
- get_sha1_hex(ptr + 1, sha1) ||
- ptr[41] != '\t')
+ if (ptr == buf.buf || *ptr != ' ')
+ goto bad_line;
+
+ tab = strchr(ptr, '\t');
+ if (!tab || tab - ptr < 41)
goto bad_line;
- ptr += 42;
+ if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
+ stage = tab[-1] - '0';
+ ptr = tab + 1; /* point at the head of path */
+ tab = tab - 2; /* point at tail of sha1 */
+ }
+ else {
+ stage = 0;
+ ptr = tab + 1; /* point at the head of path */
+ }
+
+ if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
+ goto bad_line;
if (line_termination && ptr[0] == '"')
path_name = unquote_c_style(ptr, NULL);
free(path_name);
continue;
}
+ cache_tree_invalidate_path(active_cache_tree, path_name);
if (!mode) {
/* mode == 0 means there is no such path -- remove */
* ptr[-41] is at the beginning of sha1
*/
ptr[-42] = ptr[-1] = 0;
- if (add_cacheinfo(buf.buf, ptr-41, path_name))
+ if (add_cacheinfo(mode, sha1, path_name, stage))
die("git-update-index: unable to update %s",
path_name);
}
}
}
+static const char update_index_usage[] =
+"git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again] [--ignore-missing] [-z] [--verbose] [--] <file>...";
+
+static unsigned char head_sha1[20];
+static unsigned char merge_head_sha1[20];
+
+static struct cache_entry *read_one_ent(const char *which,
+ unsigned char *ent, const char *path,
+ int namelen, int stage)
+{
+ unsigned mode;
+ unsigned char sha1[20];
+ int size;
+ struct cache_entry *ce;
+
+ if (get_tree_entry(ent, path, sha1, &mode)) {
+ if (which)
+ error("%s: not in %s branch.", path, which);
+ return NULL;
+ }
+ if (mode == S_IFDIR) {
+ if (which)
+ error("%s: not a blob in %s branch.", path, which);
+ return NULL;
+ }
+ size = cache_entry_size(namelen);
+ ce = xcalloc(1, size);
+
+ memcpy(ce->sha1, sha1, 20);
+ memcpy(ce->name, path, namelen);
+ ce->ce_flags = create_ce_flags(namelen, stage);
+ ce->ce_mode = create_ce_mode(mode);
+ return ce;
+}
+
+static int unresolve_one(const char *path)
+{
+ int namelen = strlen(path);
+ int pos;
+ int ret = 0;
+ struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
+
+ /* See if there is such entry in the index. */
+ pos = cache_name_pos(path, namelen);
+ if (pos < 0) {
+ /* If there isn't, either it is unmerged, or
+ * resolved as "removed" by mistake. We do not
+ * want to do anything in the former case.
+ */
+ pos = -pos-1;
+ if (pos < active_nr) {
+ struct cache_entry *ce = active_cache[pos];
+ if (ce_namelen(ce) == namelen &&
+ !memcmp(ce->name, path, namelen)) {
+ fprintf(stderr,
+ "%s: skipping still unmerged path.\n",
+ path);
+ goto free_return;
+ }
+ }
+ }
+
+ /* Grab blobs from given path from HEAD and MERGE_HEAD,
+ * stuff HEAD version in stage #2,
+ * stuff MERGE_HEAD version in stage #3.
+ */
+ ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
+ ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
+
+ if (!ce_2 || !ce_3) {
+ ret = -1;
+ goto free_return;
+ }
+ if (!memcmp(ce_2->sha1, ce_3->sha1, 20) &&
+ ce_2->ce_mode == ce_3->ce_mode) {
+ fprintf(stderr, "%s: identical in both, skipping.\n",
+ path);
+ goto free_return;
+ }
+
+ cache_tree_invalidate_path(active_cache_tree, path);
+ remove_file_from_cache(path);
+ if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
+ error("%s: cannot add our version to the index.", path);
+ ret = -1;
+ goto free_return;
+ }
+ if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
+ return 0;
+ error("%s: cannot add their version to the index.", path);
+ ret = -1;
+ free_return:
+ free(ce_2);
+ free(ce_3);
+ return ret;
+}
+
+static void read_head_pointers(void)
+{
+ if (read_ref(git_path("HEAD"), head_sha1))
+ die("No HEAD -- no initial commit yet?\n");
+ if (read_ref(git_path("MERGE_HEAD"), merge_head_sha1)) {
+ fprintf(stderr, "Not in the middle of a merge.\n");
+ exit(0);
+ }
+}
+
+static int do_unresolve(int ac, const char **av,
+ const char *prefix, int prefix_length)
+{
+ int i;
+ int err = 0;
+
+ /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
+ * are not doing a merge, so exit with success status.
+ */
+ read_head_pointers();
+
+ for (i = 1; i < ac; i++) {
+ const char *arg = av[i];
+ const char *p = prefix_path(prefix, prefix_length, arg);
+ err |= unresolve_one(p);
+ if (p < arg || p > arg + strlen(arg))
+ free((char*)p);
+ }
+ return err;
+}
+
+static int do_reupdate(int ac, const char **av,
+ const char *prefix, int prefix_length)
+{
+ /* Read HEAD and run update-index on paths that are
+ * merged and already different between index and HEAD.
+ */
+ int pos;
+ int has_head = 1;
+ const char **pathspec = get_pathspec(prefix, av + 1);
+
+ if (read_ref(git_path("HEAD"), head_sha1))
+ /* If there is no HEAD, that means it is an initial
+ * commit. Update everything in the index.
+ */
+ has_head = 0;
+ redo:
+ for (pos = 0; pos < active_nr; pos++) {
+ struct cache_entry *ce = active_cache[pos];
+ struct cache_entry *old = NULL;
+ int save_nr;
+
+ if (ce_stage(ce) || !ce_path_match(ce, pathspec))
+ continue;
+ if (has_head)
+ old = read_one_ent(NULL, head_sha1,
+ ce->name, ce_namelen(ce), 0);
+ if (old && ce->ce_mode == old->ce_mode &&
+ !memcmp(ce->sha1, old->sha1, 20)) {
+ free(old);
+ continue; /* unchanged */
+ }
+ /* Be careful. The working tree may not have the
+ * path anymore, in which case, under 'allow_remove',
+ * or worse yet 'allow_replace', active_nr may decrease.
+ */
+ save_nr = active_nr;
+ update_one(ce->name + prefix_length, prefix, prefix_length);
+ if (save_nr != active_nr)
+ goto redo;
+ }
+ return 0;
+}
+
int main(int argc, const char **argv)
{
int i, newfd, entries, has_errors = 0, line_termination = '\n';
int read_from_stdin = 0;
const char *prefix = setup_git_directory();
int prefix_length = prefix ? strlen(prefix) : 0;
+ char set_executable_bit = 0;
+ unsigned int refresh_flags = 0;
git_config(git_default_config);
- newfd = hold_index_file_for_update(&cache_file, get_index_file());
+ newfd = hold_lock_file_for_update(&lock_file, get_index_file());
if (newfd < 0)
- die("unable to create new cachefile");
+ die("unable to create new index file");
entries = read_cache();
if (entries < 0)
continue;
}
if (!strcmp(path, "-q")) {
- quiet = 1;
+ refresh_flags |= REFRESH_QUIET;
continue;
}
if (!strcmp(path, "--add")) {
continue;
}
if (!strcmp(path, "--unmerged")) {
- allow_unmerged = 1;
+ refresh_flags |= REFRESH_UNMERGED;
continue;
}
if (!strcmp(path, "--refresh")) {
- has_errors |= refresh_cache();
+ has_errors |= refresh_cache(refresh_flags);
+ continue;
+ }
+ if (!strcmp(path, "--really-refresh")) {
+ has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
continue;
}
if (!strcmp(path, "--cacheinfo")) {
+ unsigned char sha1[20];
+ unsigned int mode;
+
if (i+3 >= argc)
die("git-update-index: --cacheinfo <mode> <sha1> <path>");
- if (add_cacheinfo(argv[i+1], argv[i+2], argv[i+3]))
- die("git-update-index: --cacheinfo cannot add %s", argv[i+3]);
+
+ if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
+ get_sha1_hex(argv[i+2], sha1) ||
+ add_cacheinfo(mode, sha1, argv[i+3], 0))
+ die("git-update-index: --cacheinfo"
+ " cannot add %s", argv[i+3]);
i += 3;
continue;
}
!strcmp(path, "--chmod=+x")) {
if (argc <= i+1)
die("git-update-index: %s <path>", path);
- if (chmod_path(path[8], argv[++i]))
- die("git-update-index: %s cannot chmod %s", path, argv[i]);
+ set_executable_bit = path[8];
+ continue;
+ }
+ if (!strcmp(path, "--assume-unchanged")) {
+ mark_valid_only = MARK_VALID;
+ continue;
+ }
+ if (!strcmp(path, "--no-assume-unchanged")) {
+ mark_valid_only = UNMARK_VALID;
continue;
}
if (!strcmp(path, "--info-only")) {
break;
}
if (!strcmp(path, "--index-info")) {
+ if (i != argc - 1)
+ die("--index-info must be at the end");
allow_add = allow_replace = allow_remove = 1;
read_index_info(line_termination);
- continue;
+ break;
+ }
+ if (!strcmp(path, "--unresolve")) {
+ has_errors = do_unresolve(argc - i, argv + i,
+ prefix, prefix_length);
+ if (has_errors)
+ active_cache_changed = 0;
+ goto finish;
+ }
+ if (!strcmp(path, "--again")) {
+ has_errors = do_reupdate(argc - i, argv + i,
+ prefix, prefix_length);
+ if (has_errors)
+ active_cache_changed = 0;
+ goto finish;
}
if (!strcmp(path, "--ignore-missing")) {
- not_new = 1;
+ refresh_flags |= REFRESH_IGNORE_MISSING;
continue;
}
if (!strcmp(path, "--verbose")) {
verbose = 1;
continue;
}
+ if (!strcmp(path, "-h") || !strcmp(path, "--help"))
+ usage(update_index_usage);
die("unknown option %s", path);
}
update_one(path, prefix, prefix_length);
+ if (set_executable_bit)
+ chmod_path(set_executable_bit, path);
}
if (read_from_stdin) {
struct strbuf buf;
strbuf_init(&buf);
while (1) {
+ char *path_name;
+ const char *p;
read_line(&buf, stdin, line_termination);
if (buf.eof)
break;
- update_one(buf.buf, prefix, prefix_length);
+ if (line_termination && buf.buf[0] == '"')
+ path_name = unquote_c_style(buf.buf, NULL);
+ else
+ path_name = buf.buf;
+ p = prefix_path(prefix, prefix_length, path_name);
+ update_one(p, NULL, 0);
+ if (set_executable_bit)
+ chmod_path(set_executable_bit, p);
+ if (p < path_name || p > path_name + strlen(path_name))
+ free((char*) p);
+ if (path_name != buf.buf)
+ free(path_name);
}
}
+
+ finish:
if (active_cache_changed) {
if (write_cache(newfd, active_cache, active_nr) ||
- commit_index_file(&cache_file))
- die("Unable to write new cachefile");
+ commit_lock_file(&lock_file))
+ die("Unable to write new index file");
}
return has_errors ? 1 : 0;