* Fredrik Kuivinen.
* The thieves were Alex Riesen and Johannes Schindelin, in June/July 2006
*/
-#include <stdarg.h>
-#include <string.h>
-#include <assert.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <time.h>
#include "cache.h"
#include "cache-tree.h"
#include "commit.h"
unsigned processed:1;
};
+struct output_buffer
+{
+ struct output_buffer *next;
+ char *str;
+};
+
static struct path_list current_file_set = {NULL, 0, 0, 1};
static struct path_list current_directory_set = {NULL, 0, 0, 1};
-static int output_indent = 0;
+static int call_depth = 0;
+static int verbosity = 2;
+static int buffer_output = 1;
+static struct output_buffer *output_list, *output_end;
-static void output(const char *fmt, ...)
+static int show (int v)
+{
+ return (!call_depth && verbosity >= v) || verbosity >= 5;
+}
+
+static void output(int v, const char *fmt, ...)
{
va_list args;
- int i;
- for (i = output_indent; i--;)
- fputs(" ", stdout);
va_start(args, fmt);
- vfprintf(stdout, fmt, args);
+ if (buffer_output && show(v)) {
+ struct output_buffer *b = xmalloc(sizeof(*b));
+ nfvasprintf(&b->str, fmt, args);
+ b->next = NULL;
+ if (output_end)
+ output_end->next = b;
+ else
+ output_list = b;
+ output_end = b;
+ } else if (show(v)) {
+ int i;
+ for (i = call_depth; i--;)
+ fputs(" ", stdout);
+ vfprintf(stdout, fmt, args);
+ fputc('\n', stdout);
+ }
va_end(args);
- fputc('\n', stdout);
+}
+
+static void flush_output()
+{
+ struct output_buffer *b, *n;
+ for (b = output_list; b; b = n) {
+ int i;
+ for (i = call_depth; i--;)
+ fputs(" ", stdout);
+ fputs(b->str, stdout);
+ fputc('\n', stdout);
+ n = b->next;
+ free(b->str);
+ free(b);
+ }
+ output_list = NULL;
+ output_end = NULL;
}
static void output_commit_title(struct commit *commit)
{
int i;
- for (i = output_indent; i--;)
+ flush_output();
+ for (i = call_depth; i--;)
fputs(" ", stdout);
if (commit->util)
printf("virtual %s\n", (char *)commit->util);
}
}
-static const char *current_index_file = NULL;
-static const char *original_index_file;
-static const char *temporary_index_file;
-static int cache_dirty = 0;
-
-static int flush_cache(void)
-{
- /* flush temporary index */
- struct lock_file *lock = xcalloc(1, sizeof(struct lock_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", current_index_file);
- discard_cache();
- cache_dirty = 0;
- return 0;
-}
-
-static void setup_index(int temp)
-{
- current_index_file = temp ? temporary_index_file: original_index_file;
- if (cache_dirty) {
- discard_cache();
- cache_dirty = 0;
- }
- unlink(temporary_index_file);
- discard_cache();
-}
-
static struct cache_entry *make_cache_entry(unsigned int mode,
const unsigned char *sha1, const char *path, int stage, int refresh)
{
const char *path, int stage, int refresh, int options)
{
struct cache_entry *ce;
- if (!cache_dirty)
- read_cache_from(current_index_file);
- cache_dirty++;
ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh);
if (!ce)
return error("cache_addinfo failed: %s", strerror(cache_errno));
*/
static int index_only = 0;
-static int git_read_tree(struct tree *tree)
-{
- int rc;
- struct object_list *trees = NULL;
- struct unpack_trees_options opts;
-
- if (cache_dirty)
- die("read-tree with dirty cache");
-
- 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;
-}
-
static int git_merge_trees(int index_only,
struct tree *common,
struct tree *head,
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;
rc = unpack_trees(trees, &opts);
cache_tree_free(&active_cache_tree);
-
- cache_dirty = 1;
-
return rc;
}
+static int unmerged_index(void)
+{
+ int i;
+ for (i = 0; i < active_nr; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (ce_stage(ce))
+ return 1;
+ }
+ return 0;
+}
+
static struct tree *git_write_tree(void)
{
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 (unmerged_index())
+ return NULL;
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)
+ 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;
}
int i;
unmerged->strdup_paths = 1;
- if (!cache_dirty) {
- read_cache_from(current_index_file);
- cache_dirty++;
- }
+
for (i = 0; i < active_nr; i++) {
struct path_list_item *item;
struct stage_data *e;
int update_working_directory = !index_only && !no_wd;
if (update_cache) {
- if (!cache_dirty)
- read_cache_from(current_index_file);
- cache_dirty++;
if (remove_file_from_cache(path))
return -1;
}
static void flush_buffer(int fd, const char *buf, unsigned long size)
{
while (size > 0) {
- long ret = xwrite(fd, buf, size);
+ long ret = write_in_full(fd, buf, size);
if (ret < 0) {
/* Ignore epipe */
if (errno == EPIPE)
char *name1, *name2;
int merge_status;
- name1 = xstrdup(mkpath("%s/%s", branch1, a->path));
- name2 = xstrdup(mkpath("%s/%s", branch2, b->path));
+ name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
+ name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
fill_mm(o->sha1, &orig);
fill_mm(a->sha1, &src1);
const char *dst_name2 = ren2_dst;
if (path_list_has_path(¤t_directory_set, ren1_dst)) {
dst_name1 = del[delp++] = unique_path(ren1_dst, branch1);
- output("%s is a directory in %s adding as %s instead",
+ output(1, "%s is a directory in %s adding as %s instead",
ren1_dst, branch2, dst_name1);
remove_file(0, ren1_dst, 0);
}
if (path_list_has_path(¤t_directory_set, ren2_dst)) {
dst_name2 = del[delp++] = unique_path(ren2_dst, branch2);
- output("%s is a directory in %s adding as %s instead",
+ output(1, "%s is a directory in %s adding as %s instead",
ren2_dst, branch1, dst_name2);
remove_file(0, ren2_dst, 0);
}
const char *branch1)
{
char *new_path = unique_path(ren1->pair->two->path, branch1);
- output("Renaming %s to %s instead", ren1->pair->one->path, new_path);
+ output(1, "Renaming %s to %s instead", ren1->pair->one->path, new_path);
remove_file(0, ren1->pair->two->path, 0);
update_file(0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path);
free(new_path);
{
char *new_path1 = unique_path(ren1->pair->two->path, branch1);
char *new_path2 = unique_path(ren2->pair->two->path, branch2);
- output("Renaming %s to %s and %s to %s instead",
+ output(1, "Renaming %s to %s and %s to %s instead",
ren1->pair->one->path, new_path1,
ren2->pair->one->path, new_path2);
remove_file(0, ren1->pair->two->path, 0);
ren2->processed = 1;
if (strcmp(ren1_dst, ren2_dst) != 0) {
clean_merge = 0;
- output("CONFLICT (rename/rename): "
+ output(1, "CONFLICT (rename/rename): "
"Rename %s->%s in branch %s "
"rename %s->%s in %s",
src, ren1_dst, branch1,
branch1,
branch2);
if (mfi.merge || !mfi.clean)
- output("Renaming %s->%s", src, ren1_dst);
+ output(1, "Renaming %s->%s", src, ren1_dst);
if (mfi.merge)
- output("Auto-merging %s", ren1_dst);
+ output(2, "Auto-merging %s", ren1_dst);
if (!mfi.clean) {
- output("CONFLICT (content): merge conflict in %s",
+ output(1, "CONFLICT (content): merge conflict in %s",
ren1_dst);
clean_merge = 0;
struct diff_filespec src_other, dst_other;
int try_merge, stage = a_renames == renames1 ? 3: 2;
- remove_file(1, ren1_src, 1);
+ remove_file(1, ren1_src, index_only);
hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha);
src_other.mode = ren1->src_entry->stages[stage].mode;
if (path_list_has_path(¤t_directory_set, ren1_dst)) {
clean_merge = 0;
- output("CONFLICT (rename/directory): Rename %s->%s in %s "
+ output(1, "CONFLICT (rename/directory): Rename %s->%s in %s "
" directory %s added in %s",
ren1_src, ren1_dst, branch1,
ren1_dst, branch2);
conflict_rename_dir(ren1, branch1);
} else if (sha_eq(src_other.sha1, null_sha1)) {
clean_merge = 0;
- output("CONFLICT (rename/delete): Rename %s->%s in %s "
+ output(1, "CONFLICT (rename/delete): Rename %s->%s in %s "
"and deleted in %s",
ren1_src, ren1_dst, branch1,
branch2);
const char *new_path;
clean_merge = 0;
try_merge = 1;
- output("CONFLICT (rename/add): Rename %s->%s in %s. "
+ output(1, "CONFLICT (rename/add): Rename %s->%s in %s. "
"%s added in %s",
ren1_src, ren1_dst, branch1,
ren1_dst, branch2);
new_path = unique_path(ren1_dst, branch2);
- output("Adding as %s instead", new_path);
+ output(1, "Adding as %s instead", new_path);
update_file(0, dst_other.sha1, dst_other.mode, new_path);
} else if ((item = path_list_lookup(ren1_dst, renames2Dst))) {
ren2 = item->util;
clean_merge = 0;
ren2->processed = 1;
- output("CONFLICT (rename/rename): Rename %s->%s in %s. "
+ output(1, "CONFLICT (rename/rename): Rename %s->%s in %s. "
"Rename %s->%s in %s",
ren1_src, ren1_dst, branch1,
ren2->pair->one->path, ren2->pair->two->path, branch2);
a_branch, b_branch);
if (mfi.merge || !mfi.clean)
- output("Renaming %s => %s", ren1_src, ren1_dst);
+ output(1, "Renaming %s => %s", ren1_src, ren1_dst);
if (mfi.merge)
- output("Auto-merging %s", ren1_dst);
+ output(2, "Auto-merging %s", ren1_dst);
if (!mfi.clean) {
- output("CONFLICT (rename/modify): Merge conflict in %s",
+ output(1, "CONFLICT (rename/modify): Merge conflict in %s",
ren1_dst);
clean_merge = 0;
path_list_clear(&a_by_dst, 0);
path_list_clear(&b_by_dst, 0);
- if (cache_dirty)
- flush_cache();
return clean_merge;
}
/* Deleted in both or deleted in one and
* unchanged in the other */
if (a_sha)
- output("Removing %s", path);
+ output(2, "Removing %s", path);
/* do not touch working file if it did not exist */
remove_file(1, path, !a_sha);
} else {
/* Deleted in one and changed in the other */
clean_merge = 0;
if (!a_sha) {
- output("CONFLICT (delete/modify): %s deleted in %s "
+ output(1, "CONFLICT (delete/modify): %s deleted in %s "
"and modified in %s. Version %s of %s left in tree.",
path, branch1,
branch2, branch2, path);
update_file(0, b_sha, b_mode, path);
} else {
- output("CONFLICT (delete/modify): %s deleted in %s "
+ output(1, "CONFLICT (delete/modify): %s deleted in %s "
"and modified in %s. Version %s of %s left in tree.",
path, branch2,
branch1, branch1, path);
if (path_list_has_path(¤t_directory_set, path)) {
const char *new_path = unique_path(path, add_branch);
clean_merge = 0;
- output("CONFLICT (%s): There is a directory with name %s in %s. "
+ output(1, "CONFLICT (%s): There is a directory with name %s in %s. "
"Adding %s as %s",
conf, path, other_branch, path, new_path);
remove_file(0, path, 0);
update_file(0, sha, mode, new_path);
} else {
- output("Adding %s", path);
+ output(2, "Adding %s", path);
update_file(1, sha, mode, path);
}
} else if (a_sha && b_sha) {
reason = "add/add";
o_sha = (unsigned char *)null_sha1;
}
- output("Auto-merging %s", path);
+ output(2, "Auto-merging %s", path);
o.path = a.path = b.path = (char *)path;
hashcpy(o.sha1, o_sha);
o.mode = o_mode;
update_file(1, mfi.sha, mfi.mode, path);
else {
clean_merge = 0;
- output("CONFLICT (%s): Merge conflict in %s",
+ output(1, "CONFLICT (%s): Merge conflict in %s",
reason, path);
if (index_only)
} else
die("Fatal merge failure, shouldn't happen.");
- if (cache_dirty)
- flush_cache();
-
return clean_merge;
}
{
int code, clean;
if (sha_eq(common->object.sha1, merge->object.sha1)) {
- output("Already uptodate!");
+ output(0, "Already uptodate!");
*result = head;
return 1;
}
sha1_to_hex(head->object.sha1),
sha1_to_hex(merge->object.sha1));
- *result = git_write_tree();
-
- if (!*result) {
+ if (unmerged_index()) {
struct path_list *entries, *re_head, *re_merge;
int i;
path_list_clear(¤t_file_set, 1);
path_list_clear(re_head, 0);
path_list_clear(entries, 1);
- if (clean || index_only)
- *result = git_write_tree();
- else
- *result = NULL;
- } else {
- clean = 1;
- printf("merging of trees %s and %s resulted in %s\n",
- sha1_to_hex(head->object.sha1),
- sha1_to_hex(merge->object.sha1),
- sha1_to_hex((*result)->object.sha1));
}
+ else
+ clean = 1;
+
+ if (index_only)
+ *result = git_write_tree();
return clean;
}
struct commit *h2,
const char *branch1,
const char *branch2,
- int call_depth /* =0 */,
- struct commit *ancestor /* =None */,
+ struct commit_list *ca,
struct commit **result)
{
- struct commit_list *ca = NULL, *iter;
+ struct commit_list *iter;
struct commit *merged_common_ancestors;
struct tree *mrtree;
int clean;
- output("Merging:");
- output_commit_title(h1);
- output_commit_title(h2);
+ if (show(4)) {
+ output(4, "Merging:");
+ output_commit_title(h1);
+ output_commit_title(h2);
+ }
- if (ancestor)
- commit_list_insert(ancestor, &ca);
- else
- ca = reverse_commit_list(get_merge_bases(h1, h2, 1));
+ if (!ca) {
+ ca = get_merge_bases(h1, h2, 1);
+ ca = reverse_commit_list(ca);
+ }
- output("found %u common ancestor(s):", commit_list_count(ca));
- for (iter = ca; iter; iter = iter->next)
- output_commit_title(iter->item);
+ if (show(5)) {
+ output(5, "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) {
}
for (iter = ca; iter; iter = iter->next) {
- output_indent = call_depth + 1;
+ call_depth++;
/*
* When the merge fails, the result contains files
* with conflict markers. The cleanness flag is
* merge_trees has always overwritten it: the commited
* "conflicts" were already resolved.
*/
+ discard_cache();
merge(merged_common_ancestors, iter->item,
"Temporary merge branch 1",
"Temporary merge branch 2",
- call_depth + 1,
NULL,
&merged_common_ancestors);
- output_indent = call_depth;
+ call_depth--;
if (!merged_common_ancestors)
die("merge returned no commit");
}
- if (call_depth == 0) {
- setup_index(0 /* $GIT_DIR/index */);
+ discard_cache();
+ if (!call_depth) {
+ read_cache();
index_only = 0;
- } else {
- setup_index(1 /* temporary index */);
- git_read_tree(h1->tree);
+ } else
index_only = 1;
- }
clean = merge_trees(h1->tree, h2->tree, merged_common_ancestors->tree,
branch1, branch2, &mrtree);
- if (!ancestor && (clean || index_only)) {
+ if (index_only) {
*result = make_virtual_commit(mrtree, "merged tree");
commit_list_insert(h1, &(*result)->parents);
commit_list_insert(h2, &(*result)->parents->next);
- } else
- *result = NULL;
-
+ }
+ flush_output();
return clean;
}
+static const char *better_branch_name(const char *branch)
+{
+ static char githead_env[8 + 40 + 1];
+ char *name;
+
+ if (strlen(branch) != 40)
+ return branch;
+ sprintf(githead_env, "GITHEAD_%s", branch);
+ name = getenv(githead_env);
+ return name ? name : branch;
+}
+
static struct commit *get_ref(const char *ref)
{
unsigned char sha1[20];
if (get_sha1(ref, sha1))
die("Could not resolve ref '%s'", ref);
object = deref_tag(parse_object(sha1), ref, strlen(ref));
+ if (object->type == OBJ_TREE)
+ return make_virtual_commit((struct tree*)object,
+ better_branch_name(ref));
if (object->type != OBJ_COMMIT)
return NULL;
if (parse_commit((struct commit *)object))
return (struct commit *)object;
}
+static int merge_config(const char *var, const char *value)
+{
+ if (!strcasecmp(var, "merge.verbosity")) {
+ verbosity = git_config_int(var, value);
+ return 0;
+ }
+ return git_default_config(var, value);
+}
+
int main(int argc, char *argv[])
{
- static const char *bases[2];
+ static const char *bases[20];
static unsigned bases_count = 0;
int i, clean;
const char *branch1, *branch2;
struct commit *result, *h1, *h2;
+ struct commit_list *ca = NULL;
+ struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
+ int index_fd;
- git_config(git_default_config); /* core.filemode */
- original_index_file = getenv("GIT_INDEX_FILE");
-
- if (!original_index_file)
- original_index_file = xstrdup(git_path("index"));
-
- temporary_index_file = xstrdup(git_path("mrg-rcrsv-tmp-idx"));
+ git_config(merge_config);
+ if (getenv("GIT_MERGE_VERBOSITY"))
+ verbosity = strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10);
if (argc < 4)
die("Usage: %s <base>... -- <head> <remote> ...\n", argv[0]);
branch1 = argv[++i];
branch2 = argv[++i];
- printf("Merging %s with %s\n", branch1, branch2);
h1 = get_ref(branch1);
h2 = get_ref(branch2);
- if (bases_count == 1) {
- struct commit *ancestor = get_ref(bases[0]);
- clean = merge(h1, h2, branch1, branch2, 0, ancestor, &result);
- } else
- clean = merge(h1, h2, branch1, branch2, 0, NULL, &result);
+ branch1 = better_branch_name(branch1);
+ branch2 = better_branch_name(branch2);
+ if (verbosity >= 5)
+ buffer_output = 0;
+ if (show(3))
+ printf("Merging %s with %s\n", branch1, branch2);
+
+ index_fd = hold_lock_file_for_update(lock, get_index_file(), 1);
+
+ for (i = 0; i < bases_count; i++) {
+ struct commit *ancestor = get_ref(bases[i]);
+ ca = commit_list_insert(ancestor, &ca);
+ }
+ clean = merge(h1, h2, branch1, branch2, ca, &result);
- if (cache_dirty)
- flush_cache();
+ if (active_cache_changed &&
+ (write_cache(index_fd, active_cache, active_nr) ||
+ close(index_fd) || commit_lock_file(lock)))
+ die ("unable to write %s", get_index_file());
return clean ? 0: 1;
}
-
-/*
-vim: sw=8 noet
-*/