diff options
Diffstat (limited to 'builtin-mv.c')
| -rw-r--r-- | builtin-mv.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/builtin-mv.c b/builtin-mv.c new file mode 100644 index 0000000..990e213 --- /dev/null +++ b/builtin-mv.c @@ -0,0 +1,273 @@ +/* + * "git mv" builtin command + * + * Copyright (C) 2006 Johannes Schindelin + */ +#include "cache.h" +#include "builtin.h" +#include "dir.h" +#include "cache-tree.h" +#include "path-list.h" +#include "parse-options.h" + +static const char * const builtin_mv_usage[] = { + "git-mv [options] <source>... <destination>", + NULL +}; + +static const char **copy_pathspec(const char *prefix, const char **pathspec, + int count, int base_name) +{ + int i; + const char **result = xmalloc((count + 1) * sizeof(const char *)); + memcpy(result, pathspec, count * sizeof(const char *)); + result[count] = NULL; + for (i = 0; i < count; i++) { + int length = strlen(result[i]); + if (length > 0 && result[i][length - 1] == '/') { + result[i] = xmemdupz(result[i], length - 1); + } + if (base_name) { + const char *last_slash = strrchr(result[i], '/'); + if (last_slash) + result[i] = last_slash + 1; + } + } + return get_pathspec(prefix, result); +} + +static void show_list(const char *label, struct path_list *list) +{ + if (list->nr > 0) { + int i; + printf("%s", label); + for (i = 0; i < list->nr; i++) + printf("%s%s", i > 0 ? ", " : "", list->items[i].path); + putchar('\n'); + } +} + +static const char *add_slash(const char *path) +{ + int len = strlen(path); + if (path[len - 1] != '/') { + char *with_slash = xmalloc(len + 2); + memcpy(with_slash, path, len); + with_slash[len++] = '/'; + with_slash[len] = 0; + return with_slash; + } + return path; +} + +static struct lock_file lock_file; + +int cmd_mv(int argc, const char **argv, const char *prefix) +{ + int i, newfd; + int verbose = 0, show_only = 0, force = 0, ignore_errors = 0; + struct option builtin_mv_options[] = { + OPT__DRY_RUN(&show_only), + OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"), + OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"), + OPT_END(), + }; + const char **source, **destination, **dest_path; + enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes; + struct stat st; + struct path_list overwritten = {NULL, 0, 0, 0}; + struct path_list src_for_dst = {NULL, 0, 0, 0}; + struct path_list added = {NULL, 0, 0, 0}; + struct path_list deleted = {NULL, 0, 0, 0}; + struct path_list changed = {NULL, 0, 0, 0}; + + git_config(git_default_config); + + newfd = hold_locked_index(&lock_file, 1); + if (read_cache() < 0) + die("index file corrupt"); + + argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0); + if (--argc < 1) + usage_with_options(builtin_mv_usage, builtin_mv_options); + + source = copy_pathspec(prefix, argv, argc, 0); + modes = xcalloc(argc, sizeof(enum update_mode)); + dest_path = copy_pathspec(prefix, argv + argc, 1, 0); + + if (dest_path[0][0] == '\0') + /* special case: "." was normalized to "" */ + destination = copy_pathspec(dest_path[0], argv, argc, 1); + else if (!lstat(dest_path[0], &st) && + S_ISDIR(st.st_mode)) { + dest_path[0] = add_slash(dest_path[0]); + destination = copy_pathspec(dest_path[0], argv, argc, 1); + } else { + if (argc != 1) + usage_with_options(builtin_mv_usage, builtin_mv_options); + destination = dest_path; + } + + /* Checking */ + for (i = 0; i < argc; i++) { + const char *src = source[i], *dst = destination[i]; + int length, src_is_dir; + const char *bad = NULL; + + if (show_only) + printf("Checking rename of '%s' to '%s'\n", src, dst); + + length = strlen(src); + if (lstat(src, &st) < 0) + bad = "bad source"; + else if (!strncmp(src, dst, length) && + (dst[length] == 0 || dst[length] == '/')) { + bad = "can not move directory into itself"; + } else if ((src_is_dir = S_ISDIR(st.st_mode)) + && lstat(dst, &st) == 0) + bad = "cannot move directory over file"; + else if (src_is_dir) { + const char *src_w_slash = add_slash(src); + int len_w_slash = length + 1; + int first, last; + + modes[i] = WORKING_DIRECTORY; + + first = cache_name_pos(src_w_slash, len_w_slash); + if (first >= 0) + die ("Huh? %.*s is in index?", + len_w_slash, src_w_slash); + + first = -1 - first; + for (last = first; last < active_nr; last++) { + const char *path = active_cache[last]->name; + if (strncmp(path, src_w_slash, len_w_slash)) + break; + } + free((char *)src_w_slash); + + if (last - first < 1) + bad = "source directory is empty"; + else { + int j, dst_len; + + if (last - first > 0) { + source = xrealloc(source, + (argc + last - first) + * sizeof(char *)); + destination = xrealloc(destination, + (argc + last - first) + * sizeof(char *)); + modes = xrealloc(modes, + (argc + last - first) + * sizeof(enum update_mode)); + } + + dst = add_slash(dst); + dst_len = strlen(dst) - 1; + + for (j = 0; j < last - first; j++) { + const char *path = + active_cache[first + j]->name; + source[argc + j] = path; + destination[argc + j] = + prefix_path(dst, dst_len, + path + length); + modes[argc + j] = INDEX; + } + argc += last - first; + } + } else if (lstat(dst, &st) == 0) { + bad = "destination exists"; + if (force) { + /* + * only files can overwrite each other: + * check both source and destination + */ + if (S_ISREG(st.st_mode)) { + fprintf(stderr, "Warning: %s;" + " will overwrite!\n", + bad); + bad = NULL; + path_list_insert(dst, &overwritten); + } else + bad = "Cannot overwrite"; + } + } else if (cache_name_pos(src, length) < 0) + bad = "not under version control"; + else if (path_list_has_path(&src_for_dst, dst)) + bad = "multiple sources for the same target"; + else + path_list_insert(dst, &src_for_dst); + + if (bad) { + if (ignore_errors) { + if (--argc > 0) { + memmove(source + i, source + i + 1, + (argc - i) * sizeof(char *)); + memmove(destination + i, + destination + i + 1, + (argc - i) * sizeof(char *)); + } + } else + die ("%s, source=%s, destination=%s", + bad, src, dst); + } + } + + for (i = 0; i < argc; i++) { + const char *src = source[i], *dst = destination[i]; + enum update_mode mode = modes[i]; + if (show_only || verbose) + printf("Renaming %s to %s\n", src, dst); + if (!show_only && mode != INDEX && + rename(src, dst) < 0 && !ignore_errors) + die ("renaming %s failed: %s", src, strerror(errno)); + + if (mode == WORKING_DIRECTORY) + continue; + + if (cache_name_pos(src, strlen(src)) >= 0) { + path_list_insert(src, &deleted); + + /* destination can be a directory with 1 file inside */ + if (path_list_has_path(&overwritten, dst)) + path_list_insert(dst, &changed); + else + path_list_insert(dst, &added); + } else + path_list_insert(dst, &added); + } + + if (show_only) { + show_list("Changed : ", &changed); + show_list("Adding : ", &added); + show_list("Deleting : ", &deleted); + } else { + for (i = 0; i < changed.nr; i++) { + const char *path = changed.items[i].path; + int j = cache_name_pos(path, strlen(path)); + struct cache_entry *ce = active_cache[j]; + + if (j < 0) + die ("Huh? Cache entry for %s unknown?", path); + refresh_cache_entry(ce, 0); + } + + for (i = 0; i < added.nr; i++) { + const char *path = added.items[i].path; + add_file_to_cache(path, verbose); + } + + for (i = 0; i < deleted.nr; i++) + remove_file_from_cache(deleted.items[i].path); + + if (active_cache_changed) { + if (write_cache(newfd, active_cache, active_nr) || + commit_locked_index(&lock_file)) + die("Unable to write new index file"); + } + } + + return 0; +} |