#include "diffcore.h"
#include "run-command.h"
#include "tag.h"
-
+#include "unpack-trees.h"
#include "path-list.h"
-/*#define DEBUG*/
-
-#ifdef DEBUG
-#define debug(...) fprintf(stderr, __VA_ARGS__)
-#else
-#define debug(...) do { ; /* nothing */ } while (0)
-#endif
-
-#ifdef DEBUG
-#include "quote.h"
-static void show_ce_entry(const char *tag, struct cache_entry *ce)
-{
- if (tag && *tag &&
- (ce->ce_flags & htons(CE_VALID))) {
- static char alttag[4];
- memcpy(alttag, tag, 3);
- if (isalpha(tag[0]))
- alttag[0] = tolower(tag[0]);
- else if (tag[0] == '?')
- alttag[0] = '!';
- else {
- alttag[0] = 'v';
- alttag[1] = tag[0];
- alttag[2] = ' ';
- alttag[3] = 0;
- }
- tag = alttag;
- }
-
- fprintf(stderr,"%s%06o %s %d\t",
- tag,
- ntohl(ce->ce_mode),
- sha1_to_hex(ce->sha1),
- ce_stage(ce));
- write_name_quoted("", 0, ce->name,
- '\n', stderr);
- fputc('\n', stderr);
-}
-
-static void ls_files(void) {
- int i;
- for (i = 0; i < active_nr; i++) {
- struct cache_entry *ce = active_cache[i];
- show_ce_entry("", ce);
- }
- fprintf(stderr, "---\n");
- if (0) ls_files(); /* avoid "unused" warning */
-}
-#endif
-
/*
* A virtual commit has
* - (const char *)commit->util set to the name, and
commit->tree = tree;
commit->util = (void*)comment;
*(int*)commit->object.sha1 = virtual_id++;
+ /* avoid warnings */
+ commit->object.parsed = 1;
return commit;
}
/*
- * TODO: we should not have to copy the SHA1s around, but rather reference
- * them. That way, sha_eq() is just sha1 == sha2.
+ * Since we use get_tree_entry(), which does not put the read object into
+ * the object pool, we cannot rely on a == b.
*/
static int sha_eq(const unsigned char *a, const unsigned char *b)
{
if (!a && !b)
return 2;
- return a && b && memcmp(a, b, 20) == 0;
+ return a && b && hashcmp(a, b) == 0;
}
/*
- * TODO: check if we can just reuse the active_cache structure: it is already
- * sorted (by name, stage).
- * Only problem: do not write it when flushing the cache.
+ * Since we want to write the index eventually, we cannot reuse the index
+ * for these (temporary) data.
*/
struct stage_data
{
}
}
+static const char *current_index_file = NULL;
static const char *original_index_file;
static const char *temporary_index_file;
static int cache_dirty = 0;
{
/* flush temporary index */
struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
- int fd = hold_lock_file_for_update(lock, getenv("GIT_INDEX_FILE"));
- if (fd < 0)
- die("could not lock %s", temporary_index_file);
+ int fd = hold_lock_file_for_update(lock, current_index_file, 1);
if (write_cache(fd, active_cache, active_nr) ||
close(fd) || commit_lock_file(lock))
- die ("unable to write %s", getenv("GIT_INDEX_FILE"));
+ die ("unable to write %s", current_index_file);
discard_cache();
cache_dirty = 0;
return 0;
static void setup_index(int temp)
{
- const char *idx = temp ? temporary_index_file: original_index_file;
- if (cache_dirty)
- die("fatal: cache changed flush_cache();");
+ current_index_file = temp ? temporary_index_file: original_index_file;
+ if (cache_dirty) {
+ discard_cache();
+ cache_dirty = 0;
+ }
unlink(temporary_index_file);
- setenv("GIT_INDEX_FILE", idx, 1);
discard_cache();
}
size = cache_entry_size(len);
ce = xcalloc(1, size);
- memcpy(ce->sha1, sha1, 20);
+ hashcpy(ce->sha1, sha1);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(len, stage);
ce->ce_mode = create_ce_mode(mode);
{
struct cache_entry *ce;
if (!cache_dirty)
- read_cache_from(getenv("GIT_INDEX_FILE"));
+ read_cache_from(current_index_file);
cache_dirty++;
ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh);
if (!ce)
*/
static int index_only = 0;
-/*
- * TODO: this can be streamlined by refactoring builtin-read-tree.c
- */
-static int git_read_tree(const struct tree *tree)
+static int git_read_tree(struct tree *tree)
{
-#if 0
- fprintf(stderr, "GIT_INDEX_FILE='%s' git-read-tree %s\n",
- getenv("GIT_INDEX_FILE"),
- sha1_to_hex(tree->object.sha1));
-#endif
int rc;
- const char *argv[] = { "git-read-tree", NULL, NULL, };
+ struct object_list *trees = NULL;
+ struct unpack_trees_options opts;
+
if (cache_dirty)
die("read-tree with dirty cache");
- argv[1] = sha1_to_hex(tree->object.sha1);
- rc = run_command_v(2, argv);
- return rc < 0 ? -1: rc;
+
+ memset(&opts, 0, sizeof(opts));
+ object_list_append(&tree->object, &trees);
+ rc = unpack_trees(trees, &opts);
+ cache_tree_free(&active_cache_tree);
+
+ if (rc == 0)
+ cache_dirty = 1;
+
+ return rc;
}
-/*
- * TODO: this can be streamlined by refactoring builtin-read-tree.c
- */
-static int git_merge_trees(const char *update_arg,
+static int git_merge_trees(int index_only,
struct tree *common,
struct tree *head,
struct tree *merge)
{
-#if 0
- fprintf(stderr, "GIT_INDEX_FILE='%s' git-read-tree %s -m %s %s %s\n",
- getenv("GIT_INDEX_FILE"),
- update_arg,
- sha1_to_hex(common->object.sha1),
- sha1_to_hex(head->object.sha1),
- sha1_to_hex(merge->object.sha1));
-#endif
int rc;
- const char *argv[] = {
- "git-read-tree", NULL, "-m", NULL, NULL, NULL,
- NULL,
- };
- if (cache_dirty)
- flush_cache();
- argv[1] = update_arg;
- argv[3] = sha1_to_hex(common->object.sha1);
- argv[4] = sha1_to_hex(head->object.sha1);
- argv[5] = sha1_to_hex(merge->object.sha1);
- rc = run_command_v(6, argv);
- return rc < 0 ? -1: rc;
+ struct object_list *trees = NULL;
+ struct unpack_trees_options opts;
+
+ if (!cache_dirty) {
+ read_cache_from(current_index_file);
+ cache_dirty = 1;
+ }
+
+ memset(&opts, 0, sizeof(opts));
+ if (index_only)
+ opts.index_only = 1;
+ else
+ opts.update = 1;
+ opts.merge = 1;
+ opts.head_idx = 2;
+ opts.fn = threeway_merge;
+
+ object_list_append(&common->object, &trees);
+ object_list_append(&head->object, &trees);
+ object_list_append(&merge->object, &trees);
+
+ rc = unpack_trees(trees, &opts);
+ cache_tree_free(&active_cache_tree);
+
+ cache_dirty = 1;
+
+ return rc;
}
-/*
- * TODO: this can be streamlined by refactoring builtin-write-tree.c
- */
static struct tree *git_write_tree(void)
{
-#if 0
- fprintf(stderr, "GIT_INDEX_FILE='%s' git-write-tree\n",
- getenv("GIT_INDEX_FILE"));
-#endif
- FILE *fp;
- int rc;
- char buf[41];
- unsigned char sha1[20];
- int ch;
- unsigned i = 0;
- if (cache_dirty)
- flush_cache();
- fp = popen("git-write-tree 2>/dev/null", "r");
- while ((ch = fgetc(fp)) != EOF)
- if (i < sizeof(buf)-1 && ch >= '0' && ch <= 'f')
- buf[i++] = ch;
- else
- break;
- rc = pclose(fp);
- if (rc == -1 || WEXITSTATUS(rc))
- return NULL;
- buf[i] = '\0';
- if (get_sha1(buf, sha1) != 0)
- return NULL;
- return lookup_tree(sha1);
+ struct tree *result = NULL;
+
+ if (cache_dirty) {
+ unsigned i;
+ for (i = 0; i < active_nr; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (ce_stage(ce))
+ return NULL;
+ }
+ } else
+ read_cache_from(current_index_file);
+
+ if (!active_cache_tree)
+ active_cache_tree = cache_tree();
+
+ if (!cache_tree_fully_valid(active_cache_tree) &&
+ cache_tree_update(active_cache_tree,
+ active_cache, active_nr, 0, 0) < 0)
+ die("error building trees");
+
+ result = lookup_tree(active_cache_tree->sha1);
+
+ flush_cache();
+ cache_dirty = 0;
+
+ return result;
}
static int save_files_dirs(const unsigned char *sha1,
unsigned int mode, int stage)
{
int len = strlen(path);
- char *newpath = malloc(baselen + len + 1);
+ char *newpath = xmalloc(baselen + len + 1);
memcpy(newpath, base, baselen);
memcpy(newpath + baselen, path, len);
newpath[baselen + len] = '\0';
static int get_files_dirs(struct tree *tree)
{
int n;
- debug("get_files_dirs ...\n");
- if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs) != 0) {
- debug(" get_files_dirs done (0)\n");
+ if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs) != 0)
return 0;
- }
n = current_file_set.nr + current_directory_set.nr;
- debug(" get_files_dirs done (%d)\n", n);
return n;
}
unmerged->strdup_paths = 1;
if (!cache_dirty) {
- read_cache_from(getenv("GIT_INDEX_FILE"));
+ read_cache_from(current_index_file);
cache_dirty++;
}
for (i = 0; i < active_nr; i++) {
}
e = item->util;
e->stages[ce_stage(ce)].mode = ntohl(ce->ce_mode);
- memcpy(e->stages[ce_stage(ce)].sha, ce->sha1, 20);
+ hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1);
}
return unmerged;
int i;
struct path_list *renames;
struct diff_options opts;
-#ifdef DEBUG
- time_t t = time(0);
-
- debug("get_renames ...\n");
-#endif
renames = xcalloc(1, sizeof(struct path_list));
diff_setup(&opts);
opts.output_format = DIFF_FORMAT_NO_OUTPUT;
diff_queued_diff.nr = 0;
diff_flush(&opts);
-#ifdef DEBUG
- debug(" get_renames done in %ld\n", time(0)-t);
-#endif
return renames;
}
if (ret)
return ret;
len = strlen(name);
- dirs = malloc(len+1);
+ dirs = xmalloc(len+1);
memcpy(dirs, name, len);
dirs[len] = '\0';
while ((slash = strrchr(name, '/'))) {
return ret;
}
-/*
- * TODO: once we no longer call external programs, we'd probably be better off
- * not setting / getting the environment variable GIT_INDEX_FILE all the time.
- */
int remove_file(int clean, const char *path)
{
int update_cache = index_only || clean;
if (update_cache) {
if (!cache_dirty)
- read_cache_from(getenv("GIT_INDEX_FILE"));
+ read_cache_from(current_index_file);
cache_dirty++;
if (remove_file_from_cache(path))
return -1;
char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1);
int suffix = 0;
struct stat st;
- char *p = newpath + strlen(newpath);
+ char *p = newpath + strlen(path);
strcpy(newpath, path);
- strcat(newpath, "~");
+ *(p++) = '~';
strcpy(p, branch);
for (; *p; ++p)
if ('/' == *p)
static int mkdir_p(const char *path, unsigned long mode)
{
- /* path points to cache entries, so strdup before messing with it */
- char *buf = strdup(path);
+ /* path points to cache entries, so xstrdup before messing with it */
+ char *buf = xstrdup(path);
int result = safe_create_leading_directories(buf);
free(buf);
return result;
flush_buffer(fd, buf, size);
close(fd);
} else if (S_ISLNK(mode)) {
- char *lnk = malloc(size + 1);
+ char *lnk = xmalloc(size + 1);
memcpy(lnk, buf, size);
lnk[size] = '\0';
mkdir_p(path, 0777);
static struct merge_file_info merge_file(struct diff_filespec *o,
struct diff_filespec *a, struct diff_filespec *b,
- const char *branch1Name, const char *branch2Name)
+ const char *branch1, const char *branch2)
{
struct merge_file_info result;
result.merge = 0;
result.clean = 0;
if (S_ISREG(a->mode)) {
result.mode = a->mode;
- memcpy(result.sha, a->sha1, 20);
+ hashcpy(result.sha, a->sha1);
} else {
result.mode = b->mode;
- memcpy(result.sha, b->sha1, 20);
+ hashcpy(result.sha, b->sha1);
}
} else {
if (!sha_eq(a->sha1, o->sha1) && !sha_eq(b->sha1, o->sha1))
result.mode = a->mode == o->mode ? b->mode: a->mode;
if (sha_eq(a->sha1, o->sha1))
- memcpy(result.sha, b->sha1, 20);
+ hashcpy(result.sha, b->sha1);
else if (sha_eq(b->sha1, o->sha1))
- memcpy(result.sha, a->sha1, 20);
+ hashcpy(result.sha, a->sha1);
else if (S_ISREG(a->mode)) {
int code = 1, fd;
struct stat st;
char src2[PATH_MAX];
const char *argv[] = {
"merge", "-L", NULL, "-L", NULL, "-L", NULL,
- src1, orig, src2,
+ NULL, NULL, NULL,
NULL
};
char *la, *lb, *lo;
git_unpack_file(a->sha1, src1);
git_unpack_file(b->sha1, src2);
- argv[2] = la = strdup(mkpath("%s/%s", branch1Name, a->path));
- argv[6] = lb = strdup(mkpath("%s/%s", branch2Name, b->path));
- argv[4] = lo = strdup(mkpath("orig/%s", o->path));
+ argv[2] = la = xstrdup(mkpath("%s/%s", branch1, a->path));
+ argv[6] = lb = xstrdup(mkpath("%s/%s", branch2, b->path));
+ argv[4] = lo = xstrdup(mkpath("orig/%s", o->path));
+ argv[7] = src1;
+ argv[8] = orig;
+ argv[9] = src2,
-#if 0
- printf("%s %s %s %s %s %s %s %s %s %s\n",
- argv[0], argv[1], argv[2], argv[3], argv[4],
- argv[5], argv[6], argv[7], argv[8], argv[9]);
-#endif
code = run_command_v(10, argv);
free(la);
if (!(S_ISLNK(a->mode) || S_ISLNK(b->mode)))
die("cannot merge modes?");
- memcpy(result.sha, a->sha1, 20);
+ hashcpy(result.sha, a->sha1);
if (!sha_eq(a->sha1, b->sha1))
result.clean = 0;
free(new_path1);
}
-/* General TODO: get rid of all the debug messages */
static int process_renames(struct path_list *a_renames,
struct path_list *b_renames,
const char *a_branch,
} else {
compare = strcmp(a_renames->items[i].path,
b_renames->items[j].path);
- ren1 = a_renames->items[i++].util;
- ren2 = b_renames->items[j++].util;
+ if (compare <= 0)
+ ren1 = a_renames->items[i++].util;
+ if (compare >= 0)
+ ren2 = b_renames->items[j++].util;
}
/* TODO: refactor, so that 1/2 are not needed */
remove_file(1, ren1_src);
- memcpy(src_other.sha1,
- ren1->src_entry->stages[stage].sha, 20);
+ hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha);
src_other.mode = ren1->src_entry->stages[stage].mode;
- memcpy(dst_other.sha1,
- ren1->dst_entry->stages[stage].sha, 20);
+ hashcpy(dst_other.sha1, ren1->dst_entry->stages[stage].sha);
dst_other.mode = ren1->dst_entry->stages[stage].mode;
try_merge = 0;
static unsigned char *has_sha(const unsigned char *sha)
{
- return memcmp(sha, null_sha1, 20) == 0 ? NULL: (unsigned char *)sha;
+ return is_null_sha1(sha) ? NULL: (unsigned char *)sha;
}
/* Per entry merge function */
static int process_entry(const char *path, struct stage_data *entry,
- const char *branch1Name,
- const char *branch2Name)
+ const char *branch1,
+ const char *branch2)
{
/*
printf("processing entry, clean cache: %s\n", index_only ? "yes": "no");
if (!a_sha) {
output("CONFLICT (delete/modify): %s deleted in %s "
"and modified in %s. Version %s of %s left in tree.",
- path, branch1Name,
- branch2Name, branch2Name, path);
+ path, branch1,
+ branch2, branch2, path);
update_file(0, b_sha, b_mode, path);
} else {
output("CONFLICT (delete/modify): %s deleted in %s "
"and modified in %s. Version %s of %s left in tree.",
- path, branch2Name,
- branch1Name, branch1Name, path);
+ path, branch2,
+ branch1, branch1, path);
update_file(0, a_sha, a_mode, path);
}
}
const char *conf;
if (a_sha) {
- add_branch = branch1Name;
- other_branch = branch2Name;
+ add_branch = branch1;
+ other_branch = branch2;
mode = a_mode;
sha = a_sha;
conf = "file/directory";
} else {
- add_branch = branch2Name;
- other_branch = branch1Name;
+ add_branch = branch2;
+ other_branch = branch1;
mode = b_mode;
sha = b_sha;
conf = "directory/file";
} else {
const char *new_path1, *new_path2;
clean_merge = 0;
- new_path1 = unique_path(path, branch1Name);
- new_path2 = unique_path(path, branch2Name);
+ new_path1 = unique_path(path, branch1);
+ new_path2 = unique_path(path, branch2);
output("CONFLICT (add/add): File %s added non-identically "
"in both branches. Adding as %s and %s instead.",
path, new_path1, new_path2);
output("Auto-merging %s", path);
o.path = a.path = b.path = (char *)path;
- memcpy(o.sha1, o_sha, 20);
+ hashcpy(o.sha1, o_sha);
o.mode = o_mode;
- memcpy(a.sha1, a_sha, 20);
+ hashcpy(a.sha1, a_sha);
a.mode = a_mode;
- memcpy(b.sha1, b_sha, 20);
+ hashcpy(b.sha1, b_sha);
b.mode = b_mode;
mfi = merge_file(&o, &a, &b,
- branch1Name, branch2Name);
+ branch1, branch2);
if (mfi.clean)
update_file(1, mfi.sha, mfi.mode, path);
static int merge_trees(struct tree *head,
struct tree *merge,
struct tree *common,
- const char *branch1Name,
- const char *branch2Name,
+ const char *branch1,
+ const char *branch2,
struct tree **result)
{
int code, clean;
return 1;
}
- code = git_merge_trees(index_only ? "-i": "-u", common, head, merge);
+ code = git_merge_trees(index_only, common, head, merge);
if (code != 0)
die("merging of trees %s and %s failed",
re_head = get_renames(head, common, head, merge, entries);
re_merge = get_renames(merge, common, head, merge, entries);
clean = process_renames(re_head, re_merge,
- branch1Name, branch2Name);
+ branch1, branch2);
for (i = 0; i < entries->nr; i++) {
const char *path = entries->items[i].path;
struct stage_data *e = entries->items[i].util;
if (e->processed)
continue;
- if (!process_entry(path, e, branch1Name, branch2Name))
+ if (!process_entry(path, e, branch1, branch2))
clean = 0;
}
return clean;
}
+static struct commit_list *reverse_commit_list(struct commit_list *list)
+{
+ struct commit_list *next = NULL, *current, *backup;
+ for (current = list; current; current = backup) {
+ backup = current->next;
+ current->next = next;
+ next = current;
+ }
+ return next;
+}
+
/*
* Merge the commits h1 and h2, return the resulting virtual
* commit object and a flag indicating the cleaness of the merge.
static
int merge(struct commit *h1,
struct commit *h2,
- const char *branch1Name,
- const char *branch2Name,
+ const char *branch1,
+ const char *branch2,
int call_depth /* =0 */,
struct commit *ancestor /* =None */,
struct commit **result)
if (ancestor)
commit_list_insert(ancestor, &ca);
else
- ca = get_merge_bases(h1, h2, 1);
+ ca = reverse_commit_list(get_merge_bases(h1, h2, 1));
output("found %u common ancestor(s):", commit_list_count(ca));
for (iter = ca; iter; iter = iter->next)
output_commit_title(iter->item);
merged_common_ancestors = pop_commit(&ca);
+ if (merged_common_ancestors == NULL) {
+ /* if there is no common ancestor, make an empty tree */
+ struct tree *tree = xcalloc(1, sizeof(struct tree));
+ unsigned char hdr[40];
+ int hdrlen;
+
+ tree->object.parsed = 1;
+ tree->object.type = OBJ_TREE;
+ write_sha1_file_prepare(NULL, 0, tree_type, tree->object.sha1,
+ hdr, &hdrlen);
+ merged_common_ancestors = make_virtual_commit(tree, "ancestor");
+ }
for (iter = ca; iter; iter = iter->next) {
output_indent = call_depth + 1;
}
clean = merge_trees(h1->tree, h2->tree, merged_common_ancestors->tree,
- branch1Name, branch2Name, &mrtree);
+ branch1, branch2, &mrtree);
if (!ancestor && (clean || index_only)) {
*result = make_virtual_commit(mrtree, "merged tree");
original_index_file = getenv("GIT_INDEX_FILE");
if (!original_index_file)
- original_index_file = strdup(git_path("index"));
+ original_index_file = xstrdup(git_path("index"));
- temporary_index_file = strdup(git_path("mrg-rcrsv-tmp-idx"));
+ temporary_index_file = xstrdup(git_path("mrg-rcrsv-tmp-idx"));
if (argc < 4)
die("Usage: %s <base>... -- <head> <remote> ...\n", argv[0]);