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40aaae88ad
Most of the callers except the one in refs.c use the function to update the index file. Among the index writers, everybody except write-tree dies if they cannot open it for writing. This gives the function an extra argument, to tell it to die when it cannot create a new file as the lockfile. The only caller that does not have to die is write-tree, because updating the index for the cache-tree part is optional and not being able to do so does not affect the correctness. I think we do not have to be so careful and make the failure into die() the same way as other callers, but that would be a different patch. Signed-off-by: Junio C Hamano <junkio@cox.net>
296 lines
7.1 KiB
C
296 lines
7.1 KiB
C
/*
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* "git mv" builtin command
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*
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* Copyright (C) 2006 Johannes Schindelin
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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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#include "cache-tree.h"
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#include "path-list.h"
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static const char builtin_mv_usage[] =
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"git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";
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static const char **copy_pathspec(const char *prefix, const char **pathspec,
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int count, int base_name)
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{
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const char **result = xmalloc((count + 1) * sizeof(const char *));
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memcpy(result, pathspec, count * sizeof(const char *));
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result[count] = NULL;
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if (base_name) {
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int i;
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for (i = 0; i < count; i++) {
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const char *last_slash = strrchr(result[i], '/');
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if (last_slash)
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result[i] = last_slash + 1;
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}
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}
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return get_pathspec(prefix, result);
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}
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static void show_list(const char *label, struct path_list *list)
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{
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if (list->nr > 0) {
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int i;
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printf("%s", label);
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for (i = 0; i < list->nr; i++)
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printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
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putchar('\n');
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}
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}
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static const char *add_slash(const char *path)
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{
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int len = strlen(path);
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if (path[len - 1] != '/') {
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char *with_slash = xmalloc(len + 2);
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memcpy(with_slash, path, len);
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with_slash[len++] = '/';
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with_slash[len] = 0;
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return with_slash;
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}
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return path;
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}
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static struct lock_file lock_file;
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int cmd_mv(int argc, const char **argv, const char *prefix)
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{
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int i, newfd, count;
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int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
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const char **source, **destination, **dest_path;
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enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
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struct stat st;
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struct path_list overwritten = {NULL, 0, 0, 0};
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struct path_list src_for_dst = {NULL, 0, 0, 0};
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struct path_list added = {NULL, 0, 0, 0};
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struct path_list deleted = {NULL, 0, 0, 0};
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struct path_list changed = {NULL, 0, 0, 0};
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git_config(git_default_config);
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newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
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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, "-f")) {
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force = 1;
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continue;
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}
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if (!strcmp(arg, "-k")) {
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ignore_errors = 1;
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continue;
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}
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usage(builtin_mv_usage);
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}
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count = argc - i - 1;
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if (count < 1)
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usage(builtin_mv_usage);
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source = copy_pathspec(prefix, argv + i, count, 0);
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modes = xcalloc(count, sizeof(enum update_mode));
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dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
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if (!lstat(dest_path[0], &st) &&
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S_ISDIR(st.st_mode)) {
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dest_path[0] = add_slash(dest_path[0]);
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destination = copy_pathspec(dest_path[0], argv + i, count, 1);
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} else {
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if (count != 1)
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usage(builtin_mv_usage);
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destination = dest_path;
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}
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/* Checking */
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for (i = 0; i < count; i++) {
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const char *bad = NULL;
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if (show_only)
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printf("Checking rename of '%s' to '%s'\n",
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source[i], destination[i]);
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if (lstat(source[i], &st) < 0)
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bad = "bad source";
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if (S_ISDIR(st.st_mode)) {
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const char *dir = source[i], *dest_dir = destination[i];
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int first, last, len = strlen(dir);
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if (lstat(dest_dir, &st) == 0) {
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bad = "cannot move directory over file";
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goto next;
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}
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modes[i] = WORKING_DIRECTORY;
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first = cache_name_pos(source[i], len);
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if (first >= 0)
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die ("Huh? %s/ is in index?", dir);
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first = -1 - first;
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for (last = first; last < active_nr; last++) {
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const char *path = active_cache[last]->name;
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if (strncmp(path, dir, len) || path[len] != '/')
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break;
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}
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if (last - first < 1)
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bad = "source directory is empty";
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else if (!bad) {
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int j, dst_len = strlen(dest_dir);
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if (last - first > 0) {
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source = realloc(source,
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(count + last - first)
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* sizeof(char *));
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destination = realloc(destination,
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(count + last - first)
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* sizeof(char *));
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modes = realloc(modes,
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(count + last - first)
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* sizeof(enum update_mode));
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}
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dest_dir = add_slash(dest_dir);
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for (j = 0; j < last - first; j++) {
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const char *path =
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active_cache[first + j]->name;
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source[count + j] = path;
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destination[count + j] =
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prefix_path(dest_dir, dst_len,
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path + len);
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modes[count + j] = INDEX;
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}
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count += last - first;
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}
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goto next;
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}
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if (!bad && lstat(destination[i], &st) == 0) {
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bad = "destination exists";
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if (force) {
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/*
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* only files can overwrite each other:
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* check both source and destination
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*/
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if (S_ISREG(st.st_mode)) {
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fprintf(stderr, "Warning: %s;"
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" will overwrite!\n",
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bad);
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bad = NULL;
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path_list_insert(destination[i],
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&overwritten);
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} else
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bad = "Cannot overwrite";
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}
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}
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if (!bad &&
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!strncmp(destination[i], source[i], strlen(source[i])))
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bad = "can not move directory into itself";
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if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
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bad = "not under version control";
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if (!bad) {
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if (path_list_has_path(&src_for_dst, destination[i]))
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bad = "multiple sources for the same target";
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else
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path_list_insert(destination[i], &src_for_dst);
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}
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next:
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if (bad) {
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if (ignore_errors) {
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if (--count > 0) {
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memmove(source + i, source + i + 1,
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(count - i) * sizeof(char *));
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memmove(destination + i,
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destination + i + 1,
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(count - i) * sizeof(char *));
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}
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} else
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die ("%s, source=%s, destination=%s",
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bad, source[i], destination[i]);
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}
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}
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for (i = 0; i < count; i++) {
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if (show_only || verbose)
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printf("Renaming %s to %s\n",
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source[i], destination[i]);
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if (!show_only && modes[i] != INDEX &&
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rename(source[i], destination[i]) < 0 &&
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!ignore_errors)
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die ("renaming %s failed: %s",
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source[i], strerror(errno));
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if (modes[i] == WORKING_DIRECTORY)
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continue;
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if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
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path_list_insert(source[i], &deleted);
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/* destination can be a directory with 1 file inside */
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if (path_list_has_path(&overwritten, destination[i]))
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path_list_insert(destination[i], &changed);
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else
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path_list_insert(destination[i], &added);
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} else
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path_list_insert(destination[i], &added);
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}
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if (show_only) {
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show_list("Changed : ", &changed);
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show_list("Adding : ", &added);
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show_list("Deleting : ", &deleted);
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} else {
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for (i = 0; i < changed.nr; i++) {
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const char *path = changed.items[i].path;
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int i = cache_name_pos(path, strlen(path));
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struct cache_entry *ce = active_cache[i];
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if (i < 0)
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die ("Huh? Cache entry for %s unknown?", path);
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refresh_cache_entry(ce, 0);
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}
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for (i = 0; i < added.nr; i++) {
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const char *path = added.items[i].path;
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add_file_to_index(path, verbose);
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}
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for (i = 0; i < deleted.nr; i++) {
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const char *path = deleted.items[i].path;
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remove_file_from_cache(path);
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}
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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) ||
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commit_lock_file(&lock_file))
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die("Unable to write new index file");
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}
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}
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return 0;
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}
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