/* automatically update cleanly resolved paths to the index */
static int rerere_autoupdate;
-static char *merge_rr_path;
-
static int rerere_dir_nr;
static int rerere_dir_alloc;
static void read_rr(struct string_list *rr)
{
struct strbuf buf = STRBUF_INIT;
- FILE *in = fopen(merge_rr_path, "r");
+ FILE *in = fopen(git_path_merge_rr(), "r");
if (!in)
return;
return hunk_no;
}
-/*
- * Subclass of rerere_io that reads from an in-core buffer that is a
- * strbuf
- */
-struct rerere_io_mem {
- struct rerere_io io;
- struct strbuf input;
-};
-
-/*
- * ... and its getline() method implementation
- */
-static int rerere_mem_getline(struct strbuf *sb, struct rerere_io *io_)
-{
- struct rerere_io_mem *io = (struct rerere_io_mem *)io_;
- char *ep;
- size_t len;
-
- strbuf_release(sb);
- if (!io->input.len)
- return -1;
- ep = memchr(io->input.buf, '\n', io->input.len);
- if (!ep)
- ep = io->input.buf + io->input.len;
- else if (*ep == '\n')
- ep++;
- len = ep - io->input.buf;
- strbuf_add(sb, io->input.buf, len);
- strbuf_remove(&io->input, 0, len);
- return 0;
-}
-
-static int handle_cache(const char *path, unsigned char *sha1, const char *output)
-{
- mmfile_t mmfile[3] = {{NULL}};
- mmbuffer_t result = {NULL, 0};
- const struct cache_entry *ce;
- int pos, len, i, hunk_no;
- struct rerere_io_mem io;
- int marker_size = ll_merge_marker_size(path);
-
- /*
- * Reproduce the conflicted merge in-core
- */
- len = strlen(path);
- pos = cache_name_pos(path, len);
- if (0 <= pos)
- return -1;
- pos = -pos - 1;
-
- while (pos < active_nr) {
- enum object_type type;
- unsigned long size;
-
- ce = active_cache[pos++];
- if (ce_namelen(ce) != len || memcmp(ce->name, path, len))
- break;
- i = ce_stage(ce) - 1;
- if (!mmfile[i].ptr) {
- mmfile[i].ptr = read_sha1_file(ce->sha1, &type, &size);
- mmfile[i].size = size;
- }
- }
- for (i = 0; i < 3; i++)
- if (!mmfile[i].ptr && !mmfile[i].size)
- mmfile[i].ptr = xstrdup("");
-
- /*
- * NEEDSWORK: handle conflicts from merges with
- * merge.renormalize set, too
- */
- ll_merge(&result, path, &mmfile[0], NULL,
- &mmfile[1], "ours",
- &mmfile[2], "theirs", NULL);
- for (i = 0; i < 3; i++)
- free(mmfile[i].ptr);
-
- memset(&io, 0, sizeof(io));
- io.io.getline = rerere_mem_getline;
- if (output)
- io.io.output = fopen(output, "w");
- else
- io.io.output = NULL;
- strbuf_init(&io.input, 0);
- strbuf_attach(&io.input, result.ptr, result.size, result.size);
-
- /*
- * Grab the conflict ID and optionally write the original
- * contents with conflict markers out.
- */
- hunk_no = handle_path(sha1, (struct rerere_io *)&io, marker_size);
- strbuf_release(&io.input);
- if (io.io.output)
- fclose(io.io.output);
- return hunk_no;
-}
-
/*
* Look at a cache entry at "i" and see if it is not conflicting,
* conflicting and we are willing to handle, or conflicting and
int rerere_remaining(struct string_list *merge_rr)
{
int i;
+ if (setup_rerere(merge_rr, RERERE_READONLY))
+ return 0;
if (read_cache() < 0)
return error("Could not read index");
return 0;
}
+/*
+ * Try using the given conflict resolution "ID" to see
+ * if that recorded conflict resolves cleanly what we
+ * got in the "cur".
+ */
+static int try_merge(const struct rerere_id *id, const char *path,
+ mmfile_t *cur, mmbuffer_t *result)
+{
+ int ret;
+ mmfile_t base = {NULL, 0}, other = {NULL, 0};
+
+ if (read_mmfile(&base, rerere_path(id, "preimage")) ||
+ read_mmfile(&other, rerere_path(id, "postimage")))
+ ret = 1;
+ else
+ /*
+ * A three-way merge. Note that this honors user-customizable
+ * low-level merge driver settings.
+ */
+ ret = ll_merge(result, path, &base, NULL, cur, "", &other, "", NULL);
+
+ free(base.ptr);
+ free(other.ptr);
+
+ return ret;
+}
+
/*
* Find the conflict identified by "id"; the change between its
* "preimage" (i.e. a previous contents with conflict markers) and its
{
FILE *f;
int ret;
- mmfile_t cur = {NULL, 0}, base = {NULL, 0}, other = {NULL, 0};
+ mmfile_t cur = {NULL, 0};
mmbuffer_t result = {NULL, 0};
/*
* Normalize the conflicts in path and write it out to
* "thisimage" temporary file.
*/
- if (handle_file(path, NULL, rerere_path(id, "thisimage")) < 0) {
- ret = 1;
- goto out;
- }
-
- if (read_mmfile(&cur, rerere_path(id, "thisimage")) ||
- read_mmfile(&base, rerere_path(id, "preimage")) ||
- read_mmfile(&other, rerere_path(id, "postimage"))) {
+ if ((handle_file(path, NULL, rerere_path(id, "thisimage")) < 0) ||
+ read_mmfile(&cur, rerere_path(id, "thisimage"))) {
ret = 1;
goto out;
}
- /*
- * A three-way merge. Note that this honors user-customizable
- * low-level merge driver settings.
- */
- ret = ll_merge(&result, path, &base, NULL, &cur, "", &other, "", NULL);
+ ret = try_merge(id, path, &cur, &result);
if (ret)
goto out;
out:
free(cur.ptr);
- free(base.ptr);
- free(other.ptr);
free(result.ptr);
return ret;
git_config(git_default_config, NULL);
}
+static GIT_PATH_FUNC(git_path_rr_cache, "rr-cache")
+
static int is_rerere_enabled(void)
{
- const char *rr_cache;
int rr_cache_exists;
if (!rerere_enabled)
return 0;
- rr_cache = git_path("rr-cache");
- rr_cache_exists = is_directory(rr_cache);
+ rr_cache_exists = is_directory(git_path_rr_cache());
if (rerere_enabled < 0)
return rr_cache_exists;
- if (!rr_cache_exists && mkdir_in_gitdir(rr_cache))
- die("Could not create directory %s", rr_cache);
+ if (!rr_cache_exists && mkdir_in_gitdir(git_path_rr_cache()))
+ die("Could not create directory %s", git_path_rr_cache());
return 1;
}
if (flags & (RERERE_AUTOUPDATE|RERERE_NOAUTOUPDATE))
rerere_autoupdate = !!(flags & RERERE_AUTOUPDATE);
- merge_rr_path = git_pathdup("MERGE_RR");
- fd = hold_lock_file_for_update(&write_lock, merge_rr_path,
- LOCK_DIE_ON_ERROR);
+ if (flags & RERERE_READONLY)
+ fd = 0;
+ else
+ fd = hold_lock_file_for_update(&write_lock, git_path_merge_rr(),
+ LOCK_DIE_ON_ERROR);
read_rr(merge_rr);
return fd;
}
return status;
}
+/*
+ * Subclass of rerere_io that reads from an in-core buffer that is a
+ * strbuf
+ */
+struct rerere_io_mem {
+ struct rerere_io io;
+ struct strbuf input;
+};
+
+/*
+ * ... and its getline() method implementation
+ */
+static int rerere_mem_getline(struct strbuf *sb, struct rerere_io *io_)
+{
+ struct rerere_io_mem *io = (struct rerere_io_mem *)io_;
+ char *ep;
+ size_t len;
+
+ strbuf_release(sb);
+ if (!io->input.len)
+ return -1;
+ ep = memchr(io->input.buf, '\n', io->input.len);
+ if (!ep)
+ ep = io->input.buf + io->input.len;
+ else if (*ep == '\n')
+ ep++;
+ len = ep - io->input.buf;
+ strbuf_add(sb, io->input.buf, len);
+ strbuf_remove(&io->input, 0, len);
+ return 0;
+}
+
+static int handle_cache(const char *path, unsigned char *sha1, const char *output)
+{
+ mmfile_t mmfile[3] = {{NULL}};
+ mmbuffer_t result = {NULL, 0};
+ const struct cache_entry *ce;
+ int pos, len, i, hunk_no;
+ struct rerere_io_mem io;
+ int marker_size = ll_merge_marker_size(path);
+
+ /*
+ * Reproduce the conflicted merge in-core
+ */
+ len = strlen(path);
+ pos = cache_name_pos(path, len);
+ if (0 <= pos)
+ return -1;
+ pos = -pos - 1;
+
+ while (pos < active_nr) {
+ enum object_type type;
+ unsigned long size;
+
+ ce = active_cache[pos++];
+ if (ce_namelen(ce) != len || memcmp(ce->name, path, len))
+ break;
+ i = ce_stage(ce) - 1;
+ if (!mmfile[i].ptr) {
+ mmfile[i].ptr = read_sha1_file(ce->sha1, &type, &size);
+ mmfile[i].size = size;
+ }
+ }
+ for (i = 0; i < 3; i++)
+ if (!mmfile[i].ptr && !mmfile[i].size)
+ mmfile[i].ptr = xstrdup("");
+
+ /*
+ * NEEDSWORK: handle conflicts from merges with
+ * merge.renormalize set, too?
+ */
+ ll_merge(&result, path, &mmfile[0], NULL,
+ &mmfile[1], "ours",
+ &mmfile[2], "theirs", NULL);
+ for (i = 0; i < 3; i++)
+ free(mmfile[i].ptr);
+
+ memset(&io, 0, sizeof(io));
+ io.io.getline = rerere_mem_getline;
+ if (output)
+ io.io.output = fopen(output, "w");
+ else
+ io.io.output = NULL;
+ strbuf_init(&io.input, 0);
+ strbuf_attach(&io.input, result.ptr, result.size, result.size);
+
+ /*
+ * Grab the conflict ID and optionally write the original
+ * contents with conflict markers out.
+ */
+ hunk_no = handle_path(sha1, (struct rerere_io *)&io, marker_size);
+ strbuf_release(&io.input);
+ if (io.io.output)
+ fclose(io.io.output);
+ return hunk_no;
+}
+
static int rerere_forget_one_path(const char *path, struct string_list *rr)
{
const char *filename;
/* Nuke the recorded resolution for the conflict */
id = new_rerere_id(sha1);
- id->variant = 0; /* for now */
+
+ for (id->variant = 0;
+ id->variant < id->collection->status_nr;
+ id->variant++) {
+ mmfile_t cur = { NULL, 0 };
+ mmbuffer_t result = {NULL, 0};
+ int cleanly_resolved;
+
+ if (!has_rerere_resolution(id))
+ continue;
+
+ handle_cache(path, sha1, rerere_path(id, "thisimage"));
+ if (read_mmfile(&cur, rerere_path(id, "thisimage"))) {
+ free(cur.ptr);
+ return error("Failed to update conflicted state in '%s'",
+ path);
+ }
+ cleanly_resolved = !try_merge(id, path, &cur, &result);
+ free(result.ptr);
+ free(cur.ptr);
+ if (cleanly_resolved)
+ break;
+ }
+
+ if (id->collection->status_nr <= id->variant)
+ return error("no remembered resolution for '%s'", path);
+
filename = rerere_path(id, "postimage");
if (unlink(filename))
return (errno == ENOENT
return error("Could not read index");
fd = setup_rerere(&merge_rr, RERERE_NOAUTOUPDATE);
+ if (fd < 0)
+ return 0;
/*
* The paths may have been resolved (incorrectly);
* Garbage collection support
*/
-/*
- * Note that this is not reentrant but is used only one-at-a-time
- * so it does not matter right now.
- */
-static struct rerere_id *dirname_to_id(const char *name)
-{
- static struct rerere_id id;
- id.collection = find_rerere_dir(name);
- return &id;
-}
-
-static time_t rerere_created_at(const char *dir_name)
+static time_t rerere_created_at(struct rerere_id *id)
{
struct stat st;
- struct rerere_id *id = dirname_to_id(dir_name);
return stat(rerere_path(id, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
}
-static time_t rerere_last_used_at(const char *dir_name)
+static time_t rerere_last_used_at(struct rerere_id *id)
{
struct stat st;
- struct rerere_id *id = dirname_to_id(dir_name);
return stat(rerere_path(id, "postimage"), &st) ? (time_t) 0 : st.st_mtime;
}
*/
static void unlink_rr_item(struct rerere_id *id)
{
- unlink(rerere_path(id, "thisimage"));
- unlink(rerere_path(id, "preimage"));
- unlink(rerere_path(id, "postimage"));
- /*
- * NEEDSWORK: what if this rmdir() fails? Wouldn't we then
- * assume that we already have preimage recorded in
- * do_plain_rerere()?
- */
- rmdir(rerere_path(id, NULL));
+ unlink_or_warn(rerere_path(id, "thisimage"));
+ remove_variant(id);
+ id->collection->status[id->variant] = 0;
+}
+
+static void prune_one(struct rerere_id *id, time_t now,
+ int cutoff_resolve, int cutoff_noresolve)
+{
+ time_t then;
+ int cutoff;
+
+ then = rerere_last_used_at(id);
+ if (then)
+ cutoff = cutoff_resolve;
+ else {
+ then = rerere_created_at(id);
+ if (!then)
+ return;
+ cutoff = cutoff_noresolve;
+ }
+ if (then < now - cutoff * 86400)
+ unlink_rr_item(id);
}
void rerere_gc(struct string_list *rr)
struct string_list to_remove = STRING_LIST_INIT_DUP;
DIR *dir;
struct dirent *e;
- int i, cutoff;
- time_t now = time(NULL), then;
+ int i;
+ time_t now = time(NULL);
int cutoff_noresolve = 15;
int cutoff_resolve = 60;
+ if (setup_rerere(rr, 0) < 0)
+ return;
+
git_config_get_int("gc.rerereresolved", &cutoff_resolve);
git_config_get_int("gc.rerereunresolved", &cutoff_noresolve);
git_config(git_default_config, NULL);
die_errno("unable to open rr-cache directory");
/* Collect stale conflict IDs ... */
while ((e = readdir(dir))) {
+ struct rerere_dir *rr_dir;
+ struct rerere_id id;
+ int now_empty;
+
if (is_dot_or_dotdot(e->d_name))
continue;
-
- then = rerere_last_used_at(e->d_name);
- if (then) {
- cutoff = cutoff_resolve;
- } else {
- then = rerere_created_at(e->d_name);
- if (!then)
- continue;
- cutoff = cutoff_noresolve;
+ rr_dir = find_rerere_dir(e->d_name);
+ if (!rr_dir)
+ continue; /* or should we remove e->d_name? */
+
+ now_empty = 1;
+ for (id.variant = 0, id.collection = rr_dir;
+ id.variant < id.collection->status_nr;
+ id.variant++) {
+ prune_one(&id, now, cutoff_resolve, cutoff_noresolve);
+ if (id.collection->status[id.variant])
+ now_empty = 0;
}
- if (then < now - cutoff * 86400)
+ if (now_empty)
string_list_append(&to_remove, e->d_name);
}
closedir(dir);
- /* ... and then remove them one-by-one */
+
+ /* ... and then remove the empty directories */
for (i = 0; i < to_remove.nr; i++)
- unlink_rr_item(dirname_to_id(to_remove.items[i].string));
+ rmdir(git_path("rr-cache/%s", to_remove.items[i].string));
string_list_clear(&to_remove, 0);
+ rollback_lock_file(&write_lock);
}
/*
{
int i;
+ if (setup_rerere(merge_rr, 0) < 0)
+ return;
+
for (i = 0; i < merge_rr->nr; i++) {
struct rerere_id *id = merge_rr->items[i].util;
- if (!has_rerere_resolution(id))
+ if (!has_rerere_resolution(id)) {
unlink_rr_item(id);
+ rmdir(rerere_path(id, NULL));
+ }
}
- unlink_or_warn(git_path("MERGE_RR"));
+ unlink_or_warn(git_path_merge_rr());
+ rollback_lock_file(&write_lock);
}