mirror of
https://github.com/git/git.git
synced 2024-10-31 14:27:54 +01:00
20a16eb33e
When skip_unmerged option is not given, unpack_trees() should not just skip unmerged cache entries but keep them in the result for the caller to sort them out. For callers other than diff-index, the incoming index should never be unmerged, but diff-index is a special case caller. Signed-off-by: Junio C Hamano <gitster@pobox.com>
782 lines
18 KiB
C
782 lines
18 KiB
C
/*
|
|
* Copyright (C) 2005 Junio C Hamano
|
|
*/
|
|
#include "cache.h"
|
|
#include "quote.h"
|
|
#include "commit.h"
|
|
#include "diff.h"
|
|
#include "diffcore.h"
|
|
#include "revision.h"
|
|
#include "cache-tree.h"
|
|
#include "path-list.h"
|
|
#include "unpack-trees.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 (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);
|
|
}
|
|
|
|
int run_diff_files(struct rev_info *revs, unsigned int option)
|
|
{
|
|
int entries, i;
|
|
int diff_unmerged_stage = revs->max_count;
|
|
int silent_on_removed = option & DIFF_SILENT_ON_REMOVED;
|
|
unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
|
|
? CE_MATCH_RACY_IS_DIRTY : 0);
|
|
|
|
if (diff_unmerged_stage < 0)
|
|
diff_unmerged_stage = 2;
|
|
entries = active_nr;
|
|
for (i = 0; i < entries; i++) {
|
|
struct stat st;
|
|
unsigned int oldmode, newmode;
|
|
struct cache_entry *ce = active_cache[i];
|
|
int changed;
|
|
|
|
if (DIFF_OPT_TST(&revs->diffopt, QUIET) &&
|
|
DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES))
|
|
break;
|
|
|
|
if (!ce_path_match(ce, revs->prune_data))
|
|
continue;
|
|
|
|
if (ce_stage(ce)) {
|
|
struct combine_diff_path *dpath;
|
|
int num_compare_stages = 0;
|
|
size_t path_len;
|
|
|
|
path_len = ce_namelen(ce);
|
|
|
|
dpath = xmalloc(combine_diff_path_size(5, path_len));
|
|
dpath->path = (char *) &(dpath->parent[5]);
|
|
|
|
dpath->next = NULL;
|
|
dpath->len = path_len;
|
|
memcpy(dpath->path, ce->name, path_len);
|
|
dpath->path[path_len] = '\0';
|
|
hashclr(dpath->sha1);
|
|
memset(&(dpath->parent[0]), 0,
|
|
sizeof(struct combine_diff_parent)*5);
|
|
|
|
if (lstat(ce->name, &st) < 0) {
|
|
if (errno != ENOENT && errno != ENOTDIR) {
|
|
perror(ce->name);
|
|
continue;
|
|
}
|
|
if (silent_on_removed)
|
|
continue;
|
|
}
|
|
else
|
|
dpath->mode = ce_mode_from_stat(ce, st.st_mode);
|
|
|
|
while (i < entries) {
|
|
struct cache_entry *nce = active_cache[i];
|
|
int stage;
|
|
|
|
if (strcmp(ce->name, nce->name))
|
|
break;
|
|
|
|
/* Stage #2 (ours) is the first parent,
|
|
* stage #3 (theirs) is the second.
|
|
*/
|
|
stage = ce_stage(nce);
|
|
if (2 <= stage) {
|
|
int mode = nce->ce_mode;
|
|
num_compare_stages++;
|
|
hashcpy(dpath->parent[stage-2].sha1, nce->sha1);
|
|
dpath->parent[stage-2].mode = ce_mode_from_stat(nce, mode);
|
|
dpath->parent[stage-2].status =
|
|
DIFF_STATUS_MODIFIED;
|
|
}
|
|
|
|
/* diff against the proper unmerged stage */
|
|
if (stage == diff_unmerged_stage)
|
|
ce = nce;
|
|
i++;
|
|
}
|
|
/*
|
|
* Compensate for loop update
|
|
*/
|
|
i--;
|
|
|
|
if (revs->combine_merges && num_compare_stages == 2) {
|
|
show_combined_diff(dpath, 2,
|
|
revs->dense_combined_merges,
|
|
revs);
|
|
free(dpath);
|
|
continue;
|
|
}
|
|
free(dpath);
|
|
dpath = NULL;
|
|
|
|
/*
|
|
* Show the diff for the 'ce' if we found the one
|
|
* from the desired stage.
|
|
*/
|
|
diff_unmerge(&revs->diffopt, ce->name, 0, null_sha1);
|
|
if (ce_stage(ce) != diff_unmerged_stage)
|
|
continue;
|
|
}
|
|
|
|
if (ce_uptodate(ce))
|
|
continue;
|
|
if (lstat(ce->name, &st) < 0) {
|
|
if (errno != ENOENT && errno != ENOTDIR) {
|
|
perror(ce->name);
|
|
continue;
|
|
}
|
|
if (silent_on_removed)
|
|
continue;
|
|
diff_addremove(&revs->diffopt, '-', ce->ce_mode,
|
|
ce->sha1, ce->name, NULL);
|
|
continue;
|
|
}
|
|
changed = ce_match_stat(ce, &st, ce_option);
|
|
if (!changed && !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
|
|
continue;
|
|
oldmode = ce->ce_mode;
|
|
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);
|
|
|
|
}
|
|
diffcore_std(&revs->diffopt);
|
|
diff_flush(&revs->diffopt);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* diff-index
|
|
*/
|
|
|
|
/* A file entry went away or appeared */
|
|
static void diff_index_show_file(struct rev_info *revs,
|
|
const char *prefix,
|
|
struct cache_entry *ce,
|
|
const unsigned char *sha1, unsigned int mode)
|
|
{
|
|
diff_addremove(&revs->diffopt, prefix[0], mode,
|
|
sha1, ce->name, NULL);
|
|
}
|
|
|
|
static int get_stat_data(struct cache_entry *ce,
|
|
const unsigned char **sha1p,
|
|
unsigned int *modep,
|
|
int cached, int match_missing)
|
|
{
|
|
const unsigned char *sha1 = ce->sha1;
|
|
unsigned int mode = ce->ce_mode;
|
|
|
|
if (!cached) {
|
|
int changed;
|
|
struct stat st;
|
|
if (lstat(ce->name, &st) < 0) {
|
|
if (errno == ENOENT && match_missing) {
|
|
*sha1p = sha1;
|
|
*modep = mode;
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
changed = ce_match_stat(ce, &st, 0);
|
|
if (changed) {
|
|
mode = ce_mode_from_stat(ce, st.st_mode);
|
|
sha1 = null_sha1;
|
|
}
|
|
}
|
|
|
|
*sha1p = sha1;
|
|
*modep = mode;
|
|
return 0;
|
|
}
|
|
|
|
static void show_new_file(struct rev_info *revs,
|
|
struct cache_entry *new,
|
|
int cached, int match_missing)
|
|
{
|
|
const unsigned char *sha1;
|
|
unsigned int mode;
|
|
|
|
/* New file in the index: it might actually be different in
|
|
* the working copy.
|
|
*/
|
|
if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0)
|
|
return;
|
|
|
|
diff_index_show_file(revs, "+", new, sha1, mode);
|
|
}
|
|
|
|
static int show_modified(struct rev_info *revs,
|
|
struct cache_entry *old,
|
|
struct cache_entry *new,
|
|
int report_missing,
|
|
int cached, int match_missing)
|
|
{
|
|
unsigned int mode, oldmode;
|
|
const unsigned char *sha1;
|
|
|
|
if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0) {
|
|
if (report_missing)
|
|
diff_index_show_file(revs, "-", old,
|
|
old->sha1, old->ce_mode);
|
|
return -1;
|
|
}
|
|
|
|
if (revs->combine_merges && !cached &&
|
|
(hashcmp(sha1, old->sha1) || hashcmp(old->sha1, new->sha1))) {
|
|
struct combine_diff_path *p;
|
|
int pathlen = ce_namelen(new);
|
|
|
|
p = xmalloc(combine_diff_path_size(2, pathlen));
|
|
p->path = (char *) &p->parent[2];
|
|
p->next = NULL;
|
|
p->len = pathlen;
|
|
memcpy(p->path, new->name, pathlen);
|
|
p->path[pathlen] = 0;
|
|
p->mode = mode;
|
|
hashclr(p->sha1);
|
|
memset(p->parent, 0, 2 * sizeof(struct combine_diff_parent));
|
|
p->parent[0].status = DIFF_STATUS_MODIFIED;
|
|
p->parent[0].mode = new->ce_mode;
|
|
hashcpy(p->parent[0].sha1, new->sha1);
|
|
p->parent[1].status = DIFF_STATUS_MODIFIED;
|
|
p->parent[1].mode = old->ce_mode;
|
|
hashcpy(p->parent[1].sha1, old->sha1);
|
|
show_combined_diff(p, 2, revs->dense_combined_merges, revs);
|
|
free(p);
|
|
return 0;
|
|
}
|
|
|
|
oldmode = old->ce_mode;
|
|
if (mode == oldmode && !hashcmp(sha1, old->sha1) &&
|
|
!DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
|
|
return 0;
|
|
|
|
diff_change(&revs->diffopt, oldmode, mode,
|
|
old->sha1, sha1, old->name, NULL);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This turns all merge entries into "stage 3". That guarantees that
|
|
* when we read in the new tree (into "stage 1"), we won't lose sight
|
|
* of the fact that we had unmerged entries.
|
|
*/
|
|
static void mark_merge_entries(void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < active_nr; i++) {
|
|
struct cache_entry *ce = active_cache[i];
|
|
if (!ce_stage(ce))
|
|
continue;
|
|
ce->ce_flags |= CE_STAGEMASK;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This gets a mix of an existing index and a tree, one pathname entry
|
|
* at a time. The index entry may be a single stage-0 one, but it could
|
|
* also be multiple unmerged entries (in which case idx_pos/idx_nr will
|
|
* give you the position and number of entries in the index).
|
|
*/
|
|
static void do_oneway_diff(struct unpack_trees_options *o,
|
|
struct cache_entry *idx,
|
|
struct cache_entry *tree)
|
|
{
|
|
struct rev_info *revs = o->unpack_data;
|
|
int match_missing, cached;
|
|
|
|
/*
|
|
* Backward compatibility wart - "diff-index -m" does
|
|
* not mean "do not ignore merges", but "match_missing".
|
|
*
|
|
* But with the revision flag parsing, that's found in
|
|
* "!revs->ignore_merges".
|
|
*/
|
|
cached = o->index_only;
|
|
match_missing = !revs->ignore_merges;
|
|
|
|
if (cached && idx && ce_stage(idx)) {
|
|
if (tree)
|
|
diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode, idx->sha1);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Something added to the tree?
|
|
*/
|
|
if (!tree) {
|
|
show_new_file(revs, idx, cached, match_missing);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Something removed from the tree?
|
|
*/
|
|
if (!idx) {
|
|
diff_index_show_file(revs, "-", tree, tree->sha1, tree->ce_mode);
|
|
return;
|
|
}
|
|
|
|
/* Show difference between old and new */
|
|
show_modified(revs, tree, idx, 1, cached, match_missing);
|
|
}
|
|
|
|
static inline void skip_same_name(struct cache_entry *ce, struct unpack_trees_options *o)
|
|
{
|
|
int len = ce_namelen(ce);
|
|
const struct index_state *index = o->src_index;
|
|
|
|
while (o->pos < index->cache_nr) {
|
|
struct cache_entry *next = index->cache[o->pos];
|
|
if (len != ce_namelen(next))
|
|
break;
|
|
if (memcmp(ce->name, next->name, len))
|
|
break;
|
|
o->pos++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The unpack_trees() interface is designed for merging, so
|
|
* the different source entries are designed primarily for
|
|
* the source trees, with the old index being really mainly
|
|
* used for being replaced by the result.
|
|
*
|
|
* For diffing, the index is more important, and we only have a
|
|
* single tree.
|
|
*
|
|
* We're supposed to return how many index entries we want to skip.
|
|
*
|
|
* This wrapper makes it all more readable, and takes care of all
|
|
* the fairly complex unpack_trees() semantic requirements, including
|
|
* the skipping, the path matching, the type conflict cases etc.
|
|
*/
|
|
static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
|
|
{
|
|
struct cache_entry *idx = src[0];
|
|
struct cache_entry *tree = src[1];
|
|
struct rev_info *revs = o->unpack_data;
|
|
|
|
if (idx && ce_stage(idx))
|
|
skip_same_name(idx, o);
|
|
|
|
/*
|
|
* Unpack-trees generates a DF/conflict entry if
|
|
* there was a directory in the index and a tree
|
|
* in the tree. From a diff standpoint, that's a
|
|
* delete of the tree and a create of the file.
|
|
*/
|
|
if (tree == o->df_conflict_entry)
|
|
tree = NULL;
|
|
|
|
if (ce_path_match(idx ? idx : tree, revs->prune_data))
|
|
do_oneway_diff(o, idx, tree);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int run_diff_index(struct rev_info *revs, int cached)
|
|
{
|
|
struct object *ent;
|
|
struct tree *tree;
|
|
const char *tree_name;
|
|
struct unpack_trees_options opts;
|
|
struct tree_desc t;
|
|
|
|
mark_merge_entries();
|
|
|
|
ent = revs->pending.objects[0].item;
|
|
tree_name = revs->pending.objects[0].name;
|
|
tree = parse_tree_indirect(ent->sha1);
|
|
if (!tree)
|
|
return error("bad tree object %s", tree_name);
|
|
|
|
memset(&opts, 0, sizeof(opts));
|
|
opts.head_idx = 1;
|
|
opts.index_only = cached;
|
|
opts.merge = 1;
|
|
opts.fn = oneway_diff;
|
|
opts.unpack_data = revs;
|
|
opts.src_index = &the_index;
|
|
opts.dst_index = NULL;
|
|
|
|
init_tree_desc(&t, tree->buffer, tree->size);
|
|
if (unpack_trees(1, &t, &opts))
|
|
exit(128);
|
|
|
|
diffcore_std(&revs->diffopt);
|
|
diff_flush(&revs->diffopt);
|
|
return 0;
|
|
}
|
|
|
|
int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
|
|
{
|
|
struct tree *tree;
|
|
struct rev_info revs;
|
|
int i;
|
|
struct cache_entry **dst;
|
|
struct cache_entry *last = NULL;
|
|
struct unpack_trees_options opts;
|
|
struct tree_desc t;
|
|
|
|
/*
|
|
* This is used by git-blame to run diff-cache internally;
|
|
* it potentially needs to repeatedly run this, so we will
|
|
* start by removing the higher order entries the last round
|
|
* left behind.
|
|
*/
|
|
dst = active_cache;
|
|
for (i = 0; i < active_nr; i++) {
|
|
struct cache_entry *ce = active_cache[i];
|
|
if (ce_stage(ce)) {
|
|
if (last && !strcmp(ce->name, last->name))
|
|
continue;
|
|
cache_tree_invalidate_path(active_cache_tree,
|
|
ce->name);
|
|
last = ce;
|
|
ce->ce_flags |= CE_REMOVE;
|
|
}
|
|
*dst++ = ce;
|
|
}
|
|
active_nr = dst - active_cache;
|
|
|
|
init_revisions(&revs, NULL);
|
|
revs.prune_data = opt->paths;
|
|
tree = parse_tree_indirect(tree_sha1);
|
|
if (!tree)
|
|
die("bad tree object %s", sha1_to_hex(tree_sha1));
|
|
|
|
memset(&opts, 0, sizeof(opts));
|
|
opts.head_idx = 1;
|
|
opts.index_only = 1;
|
|
opts.merge = 1;
|
|
opts.fn = oneway_diff;
|
|
opts.unpack_data = &revs;
|
|
opts.src_index = &the_index;
|
|
opts.dst_index = &the_index;
|
|
|
|
init_tree_desc(&t, tree->buffer, tree->size);
|
|
if (unpack_trees(1, &t, &opts))
|
|
exit(128);
|
|
return 0;
|
|
}
|