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-rw-r--r--entry.c255
1 files changed, 219 insertions, 36 deletions
diff --git a/entry.c b/entry.c
index 1eda8e9471..2101201a11 100644
--- a/entry.c
+++ b/entry.c
@@ -2,11 +2,14 @@
#include "blob.h"
#include "dir.h"
#include "streaming.h"
+#include "submodule.h"
+#include "progress.h"
+#include "fsmonitor.h"
static void create_directories(const char *path, int path_len,
const struct checkout *state)
{
- char *buf = xmalloc(path_len + 1);
+ char *buf = xmallocz(path_len);
int len = 0;
while (len < path_len) {
@@ -82,12 +85,12 @@ static int create_file(const char *path, unsigned int mode)
static void *read_blob_entry(const struct cache_entry *ce, unsigned long *size)
{
enum object_type type;
- void *new = read_sha1_file(ce->sha1, &type, size);
+ void *blob_data = read_object_file(&ce->oid, &type, size);
- if (new) {
+ if (blob_data) {
if (type == OBJ_BLOB)
- return new;
- free(new);
+ return blob_data;
+ free(blob_data);
}
return NULL;
}
@@ -96,8 +99,8 @@ static int open_output_fd(char *path, const struct cache_entry *ce, int to_tempf
{
int symlink = (ce->ce_mode & S_IFMT) != S_IFREG;
if (to_tempfile) {
- strcpy(path, symlink
- ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
+ xsnprintf(path, TEMPORARY_FILENAME_LENGTH, "%s",
+ symlink ? ".merge_link_XXXXXX" : ".merge_file_XXXXXX");
return mkstemp(path);
} else {
return create_file(path, !symlink ? ce->ce_mode : 0666);
@@ -127,7 +130,7 @@ static int streaming_write_entry(const struct cache_entry *ce, char *path,
if (fd < 0)
return -1;
- result |= stream_blob_to_fd(fd, ce->sha1, filter, 1);
+ result |= stream_blob_to_fd(fd, &ce->oid, filter, 1);
*fstat_done = fstat_output(fd, state, statbuf);
result |= close(fd);
@@ -136,19 +139,134 @@ static int streaming_write_entry(const struct cache_entry *ce, char *path,
return result;
}
+void enable_delayed_checkout(struct checkout *state)
+{
+ if (!state->delayed_checkout) {
+ state->delayed_checkout = xmalloc(sizeof(*state->delayed_checkout));
+ state->delayed_checkout->state = CE_CAN_DELAY;
+ string_list_init(&state->delayed_checkout->filters, 0);
+ string_list_init(&state->delayed_checkout->paths, 0);
+ }
+}
+
+static int remove_available_paths(struct string_list_item *item, void *cb_data)
+{
+ struct string_list *available_paths = cb_data;
+ struct string_list_item *available;
+
+ available = string_list_lookup(available_paths, item->string);
+ if (available)
+ available->util = (void *)item->string;
+ return !available;
+}
+
+int finish_delayed_checkout(struct checkout *state)
+{
+ int errs = 0;
+ unsigned delayed_object_count;
+ off_t filtered_bytes = 0;
+ struct string_list_item *filter, *path;
+ struct progress *progress;
+ struct delayed_checkout *dco = state->delayed_checkout;
+
+ if (!state->delayed_checkout)
+ return errs;
+
+ dco->state = CE_RETRY;
+ delayed_object_count = dco->paths.nr;
+ progress = start_delayed_progress(_("Filtering content"), delayed_object_count);
+ while (dco->filters.nr > 0) {
+ for_each_string_list_item(filter, &dco->filters) {
+ struct string_list available_paths = STRING_LIST_INIT_NODUP;
+ display_progress(progress, delayed_object_count - dco->paths.nr);
+
+ if (!async_query_available_blobs(filter->string, &available_paths)) {
+ /* Filter reported an error */
+ errs = 1;
+ filter->string = "";
+ continue;
+ }
+ if (available_paths.nr <= 0) {
+ /*
+ * Filter responded with no entries. That means
+ * the filter is done and we can remove the
+ * filter from the list (see
+ * "string_list_remove_empty_items" call below).
+ */
+ filter->string = "";
+ continue;
+ }
+
+ /*
+ * In dco->paths we store a list of all delayed paths.
+ * The filter just send us a list of available paths.
+ * Remove them from the list.
+ */
+ filter_string_list(&dco->paths, 0,
+ &remove_available_paths, &available_paths);
+
+ for_each_string_list_item(path, &available_paths) {
+ struct cache_entry* ce;
+
+ if (!path->util) {
+ error("external filter '%s' signaled that '%s' "
+ "is now available although it has not been "
+ "delayed earlier",
+ filter->string, path->string);
+ errs |= 1;
+
+ /*
+ * Do not ask the filter for available blobs,
+ * again, as the filter is likely buggy.
+ */
+ filter->string = "";
+ continue;
+ }
+ ce = index_file_exists(state->istate, path->string,
+ strlen(path->string), 0);
+ if (ce) {
+ errs |= checkout_entry(ce, state, NULL);
+ filtered_bytes += ce->ce_stat_data.sd_size;
+ display_throughput(progress, filtered_bytes);
+ } else
+ errs = 1;
+ }
+ }
+ string_list_remove_empty_items(&dco->filters, 0);
+ }
+ stop_progress(&progress);
+ string_list_clear(&dco->filters, 0);
+
+ /* At this point we should not have any delayed paths anymore. */
+ errs |= dco->paths.nr;
+ for_each_string_list_item(path, &dco->paths) {
+ error("'%s' was not filtered properly", path->string);
+ }
+ string_list_clear(&dco->paths, 0);
+
+ free(dco);
+ state->delayed_checkout = NULL;
+
+ return errs;
+}
+
static int write_entry(struct cache_entry *ce,
char *path, const struct checkout *state, int to_tempfile)
{
unsigned int ce_mode_s_ifmt = ce->ce_mode & S_IFMT;
+ struct delayed_checkout *dco = state->delayed_checkout;
int fd, ret, fstat_done = 0;
- char *new;
+ char *new_blob;
struct strbuf buf = STRBUF_INIT;
unsigned long size;
- size_t wrote, newsize = 0;
+ ssize_t wrote;
+ size_t newsize = 0;
struct stat st;
+ const struct submodule *sub;
if (ce_mode_s_ifmt == S_IFREG) {
- struct stream_filter *filter = get_stream_filter(ce->name, ce->sha1);
+ struct stream_filter *filter = get_stream_filter(ce->name,
+ &ce->oid);
if (filter &&
!streaming_write_entry(ce, path, filter,
state, to_tempfile,
@@ -157,53 +275,92 @@ static int write_entry(struct cache_entry *ce,
}
switch (ce_mode_s_ifmt) {
- case S_IFREG:
case S_IFLNK:
- new = read_blob_entry(ce, &size);
- if (!new)
+ new_blob = read_blob_entry(ce, &size);
+ if (!new_blob)
return error("unable to read sha1 file of %s (%s)",
- path, sha1_to_hex(ce->sha1));
-
- if (ce_mode_s_ifmt == S_IFLNK && has_symlinks && !to_tempfile) {
- ret = symlink(new, path);
- free(new);
- if (ret)
- return error("unable to create symlink %s (%s)",
- path, strerror(errno));
- break;
+ path, oid_to_hex(&ce->oid));
+
+ /*
+ * We can't make a real symlink; write out a regular file entry
+ * with the symlink destination as its contents.
+ */
+ if (!has_symlinks || to_tempfile)
+ goto write_file_entry;
+
+ ret = symlink(new_blob, path);
+ free(new_blob);
+ if (ret)
+ return error_errno("unable to create symlink %s", path);
+ break;
+
+ case S_IFREG:
+ /*
+ * We do not send the blob in case of a retry, so do not
+ * bother reading it at all.
+ */
+ if (dco && dco->state == CE_RETRY) {
+ new_blob = NULL;
+ size = 0;
+ } else {
+ new_blob = read_blob_entry(ce, &size);
+ if (!new_blob)
+ return error("unable to read sha1 file of %s (%s)",
+ path, oid_to_hex(&ce->oid));
}
/*
* Convert from git internal format to working tree format
*/
- if (ce_mode_s_ifmt == S_IFREG &&
- convert_to_working_tree(ce->name, new, size, &buf)) {
- free(new);
- new = strbuf_detach(&buf, &newsize);
+ if (dco && dco->state != CE_NO_DELAY) {
+ ret = async_convert_to_working_tree(ce->name, new_blob,
+ size, &buf, dco);
+ if (ret && string_list_has_string(&dco->paths, ce->name)) {
+ free(new_blob);
+ goto delayed;
+ }
+ } else
+ ret = convert_to_working_tree(ce->name, new_blob, size, &buf);
+
+ if (ret) {
+ free(new_blob);
+ new_blob = strbuf_detach(&buf, &newsize);
size = newsize;
}
+ /*
+ * No "else" here as errors from convert are OK at this
+ * point. If the error would have been fatal (e.g.
+ * filter is required), then we would have died already.
+ */
+ write_file_entry:
fd = open_output_fd(path, ce, to_tempfile);
if (fd < 0) {
- free(new);
- return error("unable to create file %s (%s)",
- path, strerror(errno));
+ free(new_blob);
+ return error_errno("unable to create file %s", path);
}
- wrote = write_in_full(fd, new, size);
+ wrote = write_in_full(fd, new_blob, size);
if (!to_tempfile)
fstat_done = fstat_output(fd, state, &st);
close(fd);
- free(new);
- if (wrote != size)
+ free(new_blob);
+ if (wrote < 0)
return error("unable to write file %s", path);
break;
+
case S_IFGITLINK:
if (to_tempfile)
return error("cannot create temporary submodule %s", path);
if (mkdir(path, 0777) < 0)
return error("cannot create submodule directory %s", path);
+ sub = submodule_from_ce(ce);
+ if (sub)
+ return submodule_move_head(ce->name,
+ NULL, oid_to_hex(&ce->oid),
+ state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
break;
+
default:
return error("unknown file mode for %s in index", path);
}
@@ -212,11 +369,15 @@ finish:
if (state->refresh_cache) {
assert(state->istate);
if (!fstat_done)
- lstat(ce->name, &st);
+ if (lstat(ce->name, &st) < 0)
+ return error_errno("unable to stat just-written file %s",
+ ce->name);
fill_stat_cache_info(ce, &st);
ce->ce_flags |= CE_UPDATE_IN_BASE;
+ mark_fsmonitor_invalid(state->istate, ce);
state->istate->cache_changed |= CE_ENTRY_CHANGED;
}
+delayed:
return 0;
}
@@ -259,7 +420,30 @@ int checkout_entry(struct cache_entry *ce,
strbuf_add(&path, ce->name, ce_namelen(ce));
if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
+ const struct submodule *sub;
unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
+ /*
+ * Needs to be checked before !changed returns early,
+ * as the possibly empty directory was not changed
+ */
+ sub = submodule_from_ce(ce);
+ if (sub) {
+ int err;
+ if (!is_submodule_populated_gently(ce->name, &err)) {
+ struct stat sb;
+ if (lstat(ce->name, &sb))
+ die(_("could not stat file '%s'"), ce->name);
+ if (!(st.st_mode & S_IFDIR))
+ unlink_or_warn(ce->name);
+
+ return submodule_move_head(ce->name,
+ NULL, oid_to_hex(&ce->oid), 0);
+ } else
+ return submodule_move_head(ce->name,
+ "HEAD", oid_to_hex(&ce->oid),
+ state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
+ }
+
if (!changed)
return 0;
if (!state->force) {
@@ -284,8 +468,7 @@ int checkout_entry(struct cache_entry *ce,
return error("%s is a directory", path.buf);
remove_subtree(&path);
} else if (unlink(path.buf))
- return error("unable to unlink old '%s' (%s)",
- path.buf, strerror(errno));
+ return error_errno("unable to unlink old '%s'", path.buf);
} else if (state->not_new)
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 13:50:54 +0000