* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
-#include "strbuf.h"
#include "quote.h"
#include "cache-tree.h"
#include "tree-walk.h"
#include "builtin.h"
+#include "refs.h"
/*
* Default to not allowing changes to the list of files. The
return -1;
}
-static int process_file(const char *path)
+static int remove_one_path(const char *path)
{
- int size, namelen, option, status;
- struct cache_entry *ce;
- struct stat st;
+ if (!allow_remove)
+ return error("%s: does not exist and --remove not passed", path);
+ if (remove_file_from_cache(path))
+ return error("%s: cannot remove from the index", path);
+ return 0;
+}
- status = lstat(path, &st);
+/*
+ * Handle a path that couldn't be lstat'ed. It's either:
+ * - missing file (ENOENT or ENOTDIR). That's ok if we're
+ * supposed to be removing it and the removal actually
+ * succeeds.
+ * - permission error. That's never ok.
+ */
+static int process_lstat_error(const char *path, int err)
+{
+ if (err == ENOENT || err == ENOTDIR)
+ return remove_one_path(path);
+ return error("lstat(\"%s\"): %s", path, strerror(errno));
+}
- /* We probably want to do this in remove_file_from_cache() and
- * add_cache_entry() instead...
- */
- cache_tree_invalidate_path(active_cache_tree, path);
+static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
+{
+ int option, size;
+ struct cache_entry *ce;
- 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
- * being able to add "path/file". However,
- * "git-update-index --remove path" would not work.
- * --force-remove can be used but this is more user
- * friendly, especially since we can do the opposite
- * case just fine without --force-remove.
- */
- if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
- if (allow_remove) {
- if (remove_file_from_cache(path))
- return error("%s: cannot remove from the index",
- path);
- else
- return 0;
- } else if (status < 0) {
- return error("%s: does not exist and --remove not passed",
- path);
- }
- }
- if (0 == status)
- return error("%s: is a directory - add files inside instead",
- path);
- else
- return error("lstat(\"%s\"): %s", path,
- strerror(errno));
- }
+ /* Was the old index entry already up-to-date? */
+ if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
+ return 0;
- namelen = strlen(path);
- size = cache_entry_size(namelen);
+ size = cache_entry_size(len);
ce = xcalloc(1, size);
- memcpy(ce->name, path, namelen);
- ce->ce_flags = htons(namelen);
- fill_stat_cache_info(ce, &st);
-
- if (trust_executable_bit && has_symlinks)
- ce->ce_mode = create_ce_mode(st.st_mode);
- else {
- /* If there is an existing entry, pick the mode bits and type
- * from it, otherwise assume unexecutable regular file.
- */
- struct cache_entry *ent;
- int pos = cache_name_pos(path, namelen);
-
- ent = (0 <= pos) ? active_cache[pos] : NULL;
- ce->ce_mode = ce_mode_from_stat(ent, st.st_mode);
- }
+ memcpy(ce->name, path, len);
+ ce->ce_flags = htons(len);
+ fill_stat_cache_info(ce, st);
+ ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
- if (index_path(ce->sha1, path, &st, !info_only))
+ if (index_path(ce->sha1, path, st, !info_only))
return -1;
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?",
- path);
+ return error("%s: cannot add to the index - missing --add option?", path);
return 0;
}
+/*
+ * Handle a path that was a directory. Four cases:
+ *
+ * - it's already a gitlink in the index, and we keep it that
+ * way, and update it if we can (if we cannot find the HEAD,
+ * we're going to keep it unchanged in the index!)
+ *
+ * - it's a *file* in the index, in which case it should be
+ * removed as a file if removal is allowed, since it doesn't
+ * exist as such any more. If removal isn't allowed, it's
+ * an error.
+ *
+ * (NOTE! This is old and arguably fairly strange behaviour.
+ * We might want to make this an error unconditionally, and
+ * use "--force-remove" if you actually want to force removal).
+ *
+ * - it used to exist as a subdirectory (ie multiple files with
+ * this particular prefix) in the index, in which case it's wrong
+ * to try to update it as a directory.
+ *
+ * - it doesn't exist at all in the index, but it is a valid
+ * git directory, and it should be *added* as a gitlink.
+ */
+static int process_directory(const char *path, int len, struct stat *st)
+{
+ unsigned char sha1[20];
+ int pos = cache_name_pos(path, len);
+
+ /* Exact match: file or existing gitlink */
+ if (pos >= 0) {
+ struct cache_entry *ce = active_cache[pos];
+ if (S_ISGITLINK(ntohl(ce->ce_mode))) {
+
+ /* Do nothing to the index if there is no HEAD! */
+ if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
+ return 0;
+
+ return add_one_path(ce, path, len, st);
+ }
+ /* Should this be an unconditional error? */
+ return remove_one_path(path);
+ }
+
+ /* Inexact match: is there perhaps a subdirectory match? */
+ pos = -pos-1;
+ while (pos < active_nr) {
+ struct cache_entry *ce = active_cache[pos++];
+
+ if (strncmp(ce->name, path, len))
+ break;
+ if (ce->name[len] > '/')
+ break;
+ if (ce->name[len] < '/')
+ continue;
+
+ /* Subdirectory match - error out */
+ return error("%s: is a directory - add individual files instead", path);
+ }
+
+ /* No match - should we add it as a gitlink? */
+ if (!resolve_gitlink_ref(path, "HEAD", sha1))
+ return add_one_path(NULL, path, len, st);
+
+ /* Error out. */
+ return error("%s: is a directory - add files inside instead", path);
+}
+
+/*
+ * Process a regular file
+ */
+static int process_file(const char *path, int len, struct stat *st)
+{
+ int pos = cache_name_pos(path, len);
+ struct cache_entry *ce = pos < 0 ? NULL : active_cache[pos];
+
+ if (ce && S_ISGITLINK(ntohl(ce->ce_mode)))
+ return error("%s is already a gitlink, not replacing", path);
+
+ return add_one_path(ce, path, len, st);
+}
+
+static int process_path(const char *path)
+{
+ int len;
+ struct stat st;
+
+ /*
+ * First things first: get the stat information, to decide
+ * what to do about the pathname!
+ */
+ if (lstat(path, &st) < 0)
+ return process_lstat_error(path, errno);
+
+ len = strlen(path);
+ if (S_ISDIR(st.st_mode))
+ return process_directory(path, len, &st);
+
+ return process_file(path, len, &st);
+}
+
static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
const char *path, int stage)
{
return error("%s: cannot add to the index - missing --add option?",
path);
report("add '%s'", path);
- cache_tree_invalidate_path(active_cache_tree, path);
return 0;
}
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))
report("remove '%s'", path);
goto free_return;
}
- if (process_file(p))
- die("Unable to process file %s", path);
+ if (process_path(p))
+ die("Unable to process path %s", path);
report("add '%s'", path);
free_return:
if (p < path || p > path + strlen(path))
static void read_index_info(int line_termination)
{
struct strbuf buf;
- strbuf_init(&buf);
- while (1) {
+ struct strbuf uq;
+
+ strbuf_init(&buf, 0);
+ strbuf_init(&uq, 0);
+ while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
char *ptr, *tab;
char *path_name;
unsigned char sha1[20];
* 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;
-
errno = 0;
ul = strtoul(buf.buf, &ptr, 8);
if (ptr == buf.buf || *ptr != ' '
if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
goto bad_line;
- if (line_termination && ptr[0] == '"')
- path_name = unquote_c_style(ptr, NULL);
- else
- path_name = ptr;
+ path_name = ptr;
+ if (line_termination && path_name[0] == '"') {
+ strbuf_reset(&uq);
+ if (unquote_c_style(&uq, path_name, NULL)) {
+ die("git-update-index: bad quoting of path name");
+ }
+ path_name = uq.buf;
+ }
if (!verify_path(path_name)) {
fprintf(stderr, "Ignoring path %s\n", path_name);
- if (path_name != ptr)
- free(path_name);
continue;
}
- cache_tree_invalidate_path(active_cache_tree, path_name);
if (!mode) {
/* mode == 0 means there is no such path -- remove */
die("git-update-index: unable to update %s",
path_name);
}
- if (path_name != ptr)
- free(path_name);
continue;
bad_line:
die("malformed index info %s", buf.buf);
}
+ strbuf_release(&buf);
+ strbuf_release(&uq);
}
static const char update_index_usage[] =
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);
free((char*)p);
}
if (read_from_stdin) {
- struct strbuf buf;
- strbuf_init(&buf);
- while (1) {
- char *path_name;
+ struct strbuf buf, nbuf;
+
+ strbuf_init(&buf, 0);
+ strbuf_init(&nbuf, 0);
+ while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
const char *p;
- read_line(&buf, stdin, line_termination);
- if (buf.eof)
- break;
- 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);
+ if (line_termination && buf.buf[0] == '"') {
+ strbuf_reset(&nbuf);
+ if (unquote_c_style(&nbuf, buf.buf, NULL))
+ die("line is badly quoted");
+ strbuf_swap(&buf, &nbuf);
+ }
+ p = prefix_path(prefix, prefix_length, buf.buf);
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);
+ if (p < buf.buf || p > buf.buf + buf.len)
+ free((char *)p);
}
+ strbuf_release(&nbuf);
+ strbuf_release(&buf);
}
finish:
get_index_file(), strerror(lock_error));
}
if (write_cache(newfd, active_cache, active_nr) ||
- close(newfd) || commit_locked_index(lock_file))
+ commit_locked_index(lock_file))
die("Unable to write new index file");
}