#include "diffcore.h"
#include "revision.h"
#include "cache-tree.h"
-#include "path-list.h"
#include "unpack-trees.h"
#include "refs.h"
* diff-files
*/
-static int read_directory(const char *path, struct path_list *list)
-{
- DIR *dir;
- struct dirent *e;
-
- if (!(dir = opendir(path)))
- return error("Could not open directory %s", path);
-
- while ((e = readdir(dir)))
- if (strcmp(".", e->d_name) && strcmp("..", e->d_name))
- path_list_insert(e->d_name, list);
-
- closedir(dir);
- return 0;
-}
-
-static int get_mode(const char *path, int *mode)
-{
- struct stat st;
-
- if (!path || !strcmp(path, "/dev/null"))
- *mode = 0;
- else if (!strcmp(path, "-"))
- *mode = create_ce_mode(0666);
- else if (stat(path, &st))
- return error("Could not access '%s'", path);
- else
- *mode = st.st_mode;
- return 0;
-}
-
-static int queue_diff(struct diff_options *o,
- const char *name1, const char *name2)
-{
- int mode1 = 0, mode2 = 0;
-
- if (get_mode(name1, &mode1) || get_mode(name2, &mode2))
- return -1;
-
- if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2))
- return error("file/directory conflict: %s, %s", name1, name2);
-
- if (S_ISDIR(mode1) || S_ISDIR(mode2)) {
- char buffer1[PATH_MAX], buffer2[PATH_MAX];
- struct path_list p1 = {NULL, 0, 0, 1}, p2 = {NULL, 0, 0, 1};
- int len1 = 0, len2 = 0, i1, i2, ret = 0;
-
- if (name1 && read_directory(name1, &p1))
- return -1;
- if (name2 && read_directory(name2, &p2)) {
- path_list_clear(&p1, 0);
- return -1;
- }
-
- if (name1) {
- len1 = strlen(name1);
- if (len1 > 0 && name1[len1 - 1] == '/')
- len1--;
- memcpy(buffer1, name1, len1);
- buffer1[len1++] = '/';
- }
-
- if (name2) {
- len2 = strlen(name2);
- if (len2 > 0 && name2[len2 - 1] == '/')
- len2--;
- memcpy(buffer2, name2, len2);
- buffer2[len2++] = '/';
- }
-
- for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) {
- const char *n1, *n2;
- int comp;
-
- if (i1 == p1.nr)
- comp = 1;
- else if (i2 == p2.nr)
- comp = -1;
- else
- comp = strcmp(p1.items[i1].path,
- p2.items[i2].path);
-
- if (comp > 0)
- n1 = NULL;
- else {
- n1 = buffer1;
- strncpy(buffer1 + len1, p1.items[i1++].path,
- PATH_MAX - len1);
- }
-
- if (comp < 0)
- n2 = NULL;
- else {
- n2 = buffer2;
- strncpy(buffer2 + len2, p2.items[i2++].path,
- PATH_MAX - len2);
- }
-
- ret = queue_diff(o, n1, n2);
- }
- path_list_clear(&p1, 0);
- path_list_clear(&p2, 0);
-
- return ret;
- } else {
- struct diff_filespec *d1, *d2;
-
- if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
- unsigned tmp;
- const char *tmp_c;
- tmp = mode1; mode1 = mode2; mode2 = tmp;
- tmp_c = name1; name1 = name2; name2 = tmp_c;
- }
-
- if (!name1)
- name1 = "/dev/null";
- if (!name2)
- name2 = "/dev/null";
- d1 = alloc_filespec(name1);
- d2 = alloc_filespec(name2);
- fill_filespec(d1, null_sha1, mode1);
- fill_filespec(d2, null_sha1, mode2);
-
- diff_queue(&diff_queued_diff, d1, d2);
- return 0;
- }
-}
-
-/*
- * Does the path name a blob in the working tree, or a directory
- * in the working tree?
- */
-static int is_in_index(const char *path)
-{
- int len, pos;
- struct cache_entry *ce;
-
- len = strlen(path);
- while (path[len-1] == '/')
- len--;
- if (!len)
- return 1; /* "." */
- pos = cache_name_pos(path, len);
- if (0 <= pos)
- return 1;
- pos = -1 - pos;
- while (pos < active_nr) {
- ce = active_cache[pos++];
- if (ce_namelen(ce) <= len ||
- strncmp(ce->name, path, len) ||
- (ce->name[len] > '/'))
- break; /* path cannot be a prefix */
- if (ce->name[len] == '/')
- return 1;
- }
- return 0;
-}
-
-static int handle_diff_files_args(struct rev_info *revs,
- int argc, const char **argv,
- unsigned int *options)
-{
- *options = 0;
-
- /* revs->max_count == -2 means --no-index */
- while (1 < argc && argv[1][0] == '-') {
- if (!strcmp(argv[1], "--base"))
- revs->max_count = 1;
- else if (!strcmp(argv[1], "--ours"))
- revs->max_count = 2;
- else if (!strcmp(argv[1], "--theirs"))
- revs->max_count = 3;
- else if (!strcmp(argv[1], "-n") ||
- !strcmp(argv[1], "--no-index")) {
- revs->max_count = -2;
- DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
- DIFF_OPT_SET(&revs->diffopt, NO_INDEX);
- }
- else if (!strcmp(argv[1], "-q"))
- *options |= DIFF_SILENT_ON_REMOVED;
- else
- return error("invalid option: %s", argv[1]);
- argv++; argc--;
- }
-
- if (revs->max_count == -1 && revs->diffopt.nr_paths == 2) {
- /*
- * If two files are specified, and at least one is untracked,
- * default to no-index.
- */
- read_cache();
- if (!is_in_index(revs->diffopt.paths[0]) ||
- !is_in_index(revs->diffopt.paths[1])) {
- revs->max_count = -2;
- DIFF_OPT_SET(&revs->diffopt, NO_INDEX);
- }
- }
-
- /*
- * Make sure there are NO revision (i.e. pending object) parameter,
- * rev.max_count is reasonable (0 <= n <= 3),
- * there is no other revision filtering parameters.
- */
- if (revs->pending.nr || revs->max_count > 3 ||
- revs->min_age != -1 || revs->max_age != -1)
- return error("no revision allowed with diff-files");
-
- if (revs->max_count == -1 &&
- (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
- revs->combine_merges = revs->dense_combined_merges = 1;
-
- return 0;
-}
-
-static int is_outside_repo(const char *path, int nongit, const char *prefix)
-{
- int i;
- if (nongit || !strcmp(path, "-") || is_absolute_path(path))
- return 1;
- if (prefixcmp(path, "../"))
- return 0;
- if (!prefix)
- return 1;
- for (i = strlen(prefix); !prefixcmp(path, "../"); ) {
- while (i > 0 && prefix[i - 1] != '/')
- i--;
- if (--i < 0)
- return 1;
- path += 3;
- }
- return 0;
-}
-
-int setup_diff_no_index(struct rev_info *revs,
- int argc, const char ** argv, int nongit, const char *prefix)
-{
- int i;
- for (i = 1; i < argc; i++)
- if (argv[i][0] != '-' || argv[i][1] == '\0')
- break;
- else if (!strcmp(argv[i], "--")) {
- i++;
- break;
- } else if (i < argc - 3 && !strcmp(argv[i], "--no-index")) {
- i = argc - 3;
- DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
- break;
- }
- if (nongit && argc != i + 2)
- die("git diff [--no-index] takes two paths");
-
- if (argc != i + 2 || (!is_outside_repo(argv[i + 1], nongit, prefix) &&
- !is_outside_repo(argv[i], nongit, prefix)))
- return -1;
-
- diff_setup(&revs->diffopt);
- for (i = 1; i < argc - 2; )
- if (!strcmp(argv[i], "--no-index"))
- i++;
- else {
- int j = diff_opt_parse(&revs->diffopt,
- argv + i, argc - i);
- if (!j)
- die("invalid diff option/value: %s", argv[i]);
- i += j;
- }
-
- if (prefix) {
- int len = strlen(prefix);
-
- revs->diffopt.paths = xcalloc(2, sizeof(char*));
- for (i = 0; i < 2; i++) {
- const char *p = argv[argc - 2 + i];
- /*
- * stdin should be spelled as '-'; if you have
- * path that is '-', spell it as ./-.
- */
- p = (strcmp(p, "-")
- ? xstrdup(prefix_filename(prefix, len, p))
- : p);
- revs->diffopt.paths[i] = p;
- }
- }
- else
- revs->diffopt.paths = argv + argc - 2;
- revs->diffopt.nr_paths = 2;
- DIFF_OPT_SET(&revs->diffopt, NO_INDEX);
- revs->max_count = -2;
- if (diff_setup_done(&revs->diffopt) < 0)
- die("diff_setup_done failed");
- return 0;
-}
-
-int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv)
-{
- unsigned int options;
-
- if (handle_diff_files_args(revs, argc, argv, &options))
- return -1;
-
- if (DIFF_OPT_TST(&revs->diffopt, NO_INDEX)) {
- if (revs->diffopt.nr_paths != 2)
- return error("need two files/directories with --no-index");
- if (queue_diff(&revs->diffopt, revs->diffopt.paths[0],
- revs->diffopt.paths[1]))
- return -1;
- diffcore_std(&revs->diffopt);
- diff_flush(&revs->diffopt);
- /*
- * The return code for --no-index imitates diff(1):
- * 0 = no changes, 1 = changes, else error
- */
- return revs->diffopt.found_changes;
- }
-
- if (read_cache() < 0) {
- perror("read_cache");
- return -1;
- }
- return run_diff_files(revs, options);
-}
/*
- * See if work tree has an entity that can be staged. Return 0 if so,
- * return 1 if not and return -1 if error.
+ * Has the work tree entity been removed?
+ *
+ * Return 1 if it was removed from the work tree, 0 if an entity to be
+ * compared with the cache entry ce still exists (the latter includes
+ * the case where a directory that is not a submodule repository
+ * exists for ce that is a submodule -- it is a submodule that is not
+ * checked out). Return negative for an error.
*/
-static int check_work_tree_entity(const struct cache_entry *ce, struct stat *st, char *symcache)
+static int check_removed(const struct cache_entry *ce, struct stat *st)
{
if (lstat(ce->name, st) < 0) {
if (errno != ENOENT && errno != ENOTDIR)
return -1;
return 1;
}
- if (has_symlink_leading_path(ce->name, symcache))
+ if (has_symlink_leading_path(ce_namelen(ce), ce->name))
return 1;
if (S_ISDIR(st->st_mode)) {
unsigned char sub[20];
- if (resolve_gitlink_ref(ce->name, "HEAD", sub))
+
+ /*
+ * If ce is already a gitlink, we can have a plain
+ * directory (i.e. the submodule is not checked out),
+ * or a checked out submodule. Either case this is not
+ * a case where something was removed from the work tree,
+ * so we will return 0.
+ *
+ * Otherwise, if the directory is not a submodule
+ * repository, that means ce which was a blob turned into
+ * a directory --- the blob was removed!
+ */
+ if (!S_ISGITLINK(ce->ce_mode) &&
+ resolve_gitlink_ref(ce->name, "HEAD", sub))
return 1;
}
return 0;
memset(&(dpath->parent[0]), 0,
sizeof(struct combine_diff_parent)*5);
- changed = check_work_tree_entity(ce, &st, symcache);
+ changed = check_removed(ce, &st);
if (!changed)
dpath->mode = ce_mode_from_stat(ce, st.st_mode);
else {
if (ce_uptodate(ce))
continue;
- changed = check_work_tree_entity(ce, &st, symcache);
+ changed = check_removed(ce, &st);
if (changed) {
if (changed < 0) {
perror(ce->name);
if (silent_on_removed)
continue;
diff_addremove(&revs->diffopt, '-', ce->ce_mode,
- ce->sha1, ce->name, NULL);
+ ce->sha1, ce->name);
continue;
}
changed = ce_match_stat(ce, &st, ce_option);
newmode = ce_mode_from_stat(ce, st.st_mode);
diff_change(&revs->diffopt, oldmode, newmode,
ce->sha1, (changed ? null_sha1 : ce->sha1),
- ce->name, NULL);
+ ce->name);
}
diffcore_std(&revs->diffopt);
const unsigned char *sha1, unsigned int mode)
{
diff_addremove(&revs->diffopt, prefix[0], mode,
- sha1, ce->name, NULL);
+ sha1, ce->name);
}
static int get_stat_data(struct cache_entry *ce,
if (!cached) {
int changed;
struct stat st;
- changed = check_work_tree_entity(ce, &st, cbdata->symcache);
+ changed = check_removed(ce, &st);
if (changed < 0)
return -1;
else if (changed) {
return 0;
diff_change(&revs->diffopt, oldmode, mode,
- old->sha1, sha1, old->name, NULL);
+ old->sha1, sha1, old->name);
return 0;
}