diff options
| -rw-r--r-- | builtin/prune.c | 20 | ||||
| -rw-r--r-- | builtin/receive-pack.c | 2 | ||||
| -rw-r--r-- | environment.c | 5 | ||||
| -rw-r--r-- | object-file.c | 44 | ||||
| -rw-r--r-- | object-store.h | 19 | ||||
| -rw-r--r-- | object.c | 2 | ||||
| -rw-r--r-- | tmp-objdir.c | 55 | ||||
| -rw-r--r-- | tmp-objdir.h | 29 |
8 files changed, 162 insertions, 14 deletions
diff --git a/builtin/prune.c b/builtin/prune.c index 02c6ab7cba..5a344bb1b6 100644 --- a/builtin/prune.c +++ b/builtin/prune.c @@ -26,10 +26,22 @@ static int prune_tmp_file(const char *fullpath) return error("Could not stat '%s'", fullpath); if (st.st_mtime > expire) return 0; - if (show_only || verbose) - printf("Removing stale temporary file %s\n", fullpath); - if (!show_only) - unlink_or_warn(fullpath); + if (S_ISDIR(st.st_mode)) { + if (show_only || verbose) + printf("Removing stale temporary directory %s\n", fullpath); + if (!show_only) { + struct strbuf remove_dir_buf = STRBUF_INIT; + + strbuf_addstr(&remove_dir_buf, fullpath); + remove_dir_recursively(&remove_dir_buf, 0); + strbuf_release(&remove_dir_buf); + } + } else { + if (show_only || verbose) + printf("Removing stale temporary file %s\n", fullpath); + if (!show_only) + unlink_or_warn(fullpath); + } return 0; } diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index 48960a9575..418a42ca06 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -2208,7 +2208,7 @@ static const char *unpack(int err_fd, struct shallow_info *si) strvec_push(&child.args, alt_shallow_file); } - tmp_objdir = tmp_objdir_create(); + tmp_objdir = tmp_objdir_create("incoming"); if (!tmp_objdir) { if (err_fd > 0) close(err_fd); diff --git a/environment.c b/environment.c index b4ba4fa22d..e3a285a08f 100644 --- a/environment.c +++ b/environment.c @@ -17,6 +17,7 @@ #include "commit.h" #include "strvec.h" #include "object-store.h" +#include "tmp-objdir.h" #include "chdir-notify.h" #include "shallow.h" @@ -340,10 +341,14 @@ static void update_relative_gitdir(const char *name, void *data) { char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir()); + struct tmp_objdir *tmp_objdir = tmp_objdir_unapply_primary_odb(); + trace_printf_key(&trace_setup_key, "setup: move $GIT_DIR to '%s'", path); set_git_dir_1(path); + if (tmp_objdir) + tmp_objdir_reapply_primary_odb(tmp_objdir, old_cwd, new_cwd); free(path); } diff --git a/object-file.c b/object-file.c index be4f94ecf3..990381abee 100644 --- a/object-file.c +++ b/object-file.c @@ -751,6 +751,43 @@ void add_to_alternates_memory(const char *reference) '\n', NULL, 0); } +struct object_directory *set_temporary_primary_odb(const char *dir, int will_destroy) +{ + struct object_directory *new_odb; + + /* + * Make sure alternates are initialized, or else our entry may be + * overwritten when they are. + */ + prepare_alt_odb(the_repository); + + /* + * Make a new primary odb and link the old primary ODB in as an + * alternate + */ + new_odb = xcalloc(1, sizeof(*new_odb)); + new_odb->path = xstrdup(dir); + new_odb->will_destroy = will_destroy; + new_odb->next = the_repository->objects->odb; + the_repository->objects->odb = new_odb; + return new_odb->next; +} + +void restore_primary_odb(struct object_directory *restore_odb, const char *old_path) +{ + struct object_directory *cur_odb = the_repository->objects->odb; + + if (strcmp(old_path, cur_odb->path)) + BUG("expected %s as primary object store; found %s", + old_path, cur_odb->path); + + if (cur_odb->next != restore_odb) + BUG("we expect the old primary object store to be the first alternate"); + + the_repository->objects->odb = restore_odb; + free_object_directory(cur_odb); +} + /* * Compute the exact path an alternate is at and returns it. In case of * error NULL is returned and the human readable error is added to `err` @@ -1888,8 +1925,11 @@ int hash_object_file(const struct git_hash_algo *algo, const void *buf, /* Finalize a file on disk, and close it. */ static void close_loose_object(int fd) { - if (fsync_object_files) - fsync_or_die(fd, "loose object file"); + if (!the_repository->objects->odb->will_destroy) { + if (fsync_object_files) + fsync_or_die(fd, "loose object file"); + } + if (close(fd) != 0) die_errno(_("error when closing loose object file")); } diff --git a/object-store.h b/object-store.h index c5130d8bae..74b1b5872a 100644 --- a/object-store.h +++ b/object-store.h @@ -28,6 +28,11 @@ struct object_directory { struct oidtree *loose_objects_cache; /* + * This object store is ephemeral, so there is no need to fsync. + */ + int will_destroy; + + /* * Path to the alternative object store. If this is a relative path, * it is relative to the current working directory. */ @@ -59,6 +64,17 @@ void add_to_alternates_file(const char *dir); void add_to_alternates_memory(const char *dir); /* + * Replace the current writable object directory with the specified temporary + * object directory; returns the former primary object directory. + */ +struct object_directory *set_temporary_primary_odb(const char *dir, int will_destroy); + +/* + * Restore a previous ODB replaced by set_temporary_main_odb. + */ +void restore_primary_odb(struct object_directory *restore_odb, const char *old_path); + +/* * Populate and return the loose object cache array corresponding to the * given object ID. */ @@ -68,6 +84,9 @@ struct oidtree *odb_loose_cache(struct object_directory *odb, /* Empty the loose object cache for the specified object directory. */ void odb_clear_loose_cache(struct object_directory *odb); +/* Clear and free the specified object directory */ +void free_object_directory(struct object_directory *odb); + struct packed_git { struct hashmap_entry packmap_ent; struct packed_git *next; @@ -513,7 +513,7 @@ struct raw_object_store *raw_object_store_new(void) return o; } -static void free_object_directory(struct object_directory *odb) +void free_object_directory(struct object_directory *odb) { free(odb->path); odb_clear_loose_cache(odb); diff --git a/tmp-objdir.c b/tmp-objdir.c index b8d880e362..3d38eeab66 100644 --- a/tmp-objdir.c +++ b/tmp-objdir.c @@ -1,5 +1,6 @@ #include "cache.h" #include "tmp-objdir.h" +#include "chdir-notify.h" #include "dir.h" #include "sigchain.h" #include "string-list.h" @@ -11,6 +12,8 @@ struct tmp_objdir { struct strbuf path; struct strvec env; + struct object_directory *prev_odb; + int will_destroy; }; /* @@ -38,6 +41,9 @@ static int tmp_objdir_destroy_1(struct tmp_objdir *t, int on_signal) if (t == the_tmp_objdir) the_tmp_objdir = NULL; + if (!on_signal && t->prev_odb) + restore_primary_odb(t->prev_odb, t->path.buf); + /* * This may use malloc via strbuf_grow(), but we should * have pre-grown t->path sufficiently so that this @@ -52,6 +58,7 @@ static int tmp_objdir_destroy_1(struct tmp_objdir *t, int on_signal) */ if (!on_signal) tmp_objdir_free(t); + return err; } @@ -121,7 +128,7 @@ static int setup_tmp_objdir(const char *root) return ret; } -struct tmp_objdir *tmp_objdir_create(void) +struct tmp_objdir *tmp_objdir_create(const char *prefix) { static int installed_handlers; struct tmp_objdir *t; @@ -129,11 +136,16 @@ struct tmp_objdir *tmp_objdir_create(void) if (the_tmp_objdir) BUG("only one tmp_objdir can be used at a time"); - t = xmalloc(sizeof(*t)); + t = xcalloc(1, sizeof(*t)); strbuf_init(&t->path, 0); strvec_init(&t->env); - strbuf_addf(&t->path, "%s/incoming-XXXXXX", get_object_directory()); + /* + * Use a string starting with tmp_ so that the builtin/prune.c code + * can recognize any stale objdirs left behind by a crash and delete + * them. + */ + strbuf_addf(&t->path, "%s/tmp_objdir-%s-XXXXXX", get_object_directory(), prefix); /* * Grow the strbuf beyond any filename we expect to be placed in it. @@ -269,6 +281,13 @@ int tmp_objdir_migrate(struct tmp_objdir *t) if (!t) return 0; + if (t->prev_odb) { + if (the_repository->objects->odb->will_destroy) + BUG("migrating an ODB that was marked for destruction"); + restore_primary_odb(t->prev_odb, t->path.buf); + t->prev_odb = NULL; + } + strbuf_addbuf(&src, &t->path); strbuf_addstr(&dst, get_object_directory()); @@ -292,3 +311,33 @@ void tmp_objdir_add_as_alternate(const struct tmp_objdir *t) { add_to_alternates_memory(t->path.buf); } + +void tmp_objdir_replace_primary_odb(struct tmp_objdir *t, int will_destroy) +{ + if (t->prev_odb) + BUG("the primary object database is already replaced"); + t->prev_odb = set_temporary_primary_odb(t->path.buf, will_destroy); + t->will_destroy = will_destroy; +} + +struct tmp_objdir *tmp_objdir_unapply_primary_odb(void) +{ + if (!the_tmp_objdir || !the_tmp_objdir->prev_odb) + return NULL; + + restore_primary_odb(the_tmp_objdir->prev_odb, the_tmp_objdir->path.buf); + the_tmp_objdir->prev_odb = NULL; + return the_tmp_objdir; +} + +void tmp_objdir_reapply_primary_odb(struct tmp_objdir *t, const char *old_cwd, + const char *new_cwd) +{ + char *path; + + path = reparent_relative_path(old_cwd, new_cwd, t->path.buf); + strbuf_reset(&t->path); + strbuf_addstr(&t->path, path); + free(path); + tmp_objdir_replace_primary_odb(t, t->will_destroy); +} diff --git a/tmp-objdir.h b/tmp-objdir.h index b1e45b4c75..cda5ec7677 100644 --- a/tmp-objdir.h +++ b/tmp-objdir.h @@ -10,7 +10,7 @@ * * Example: * - * struct tmp_objdir *t = tmp_objdir_create(); + * struct tmp_objdir *t = tmp_objdir_create("incoming"); * if (!run_command_v_opt_cd_env(cmd, 0, NULL, tmp_objdir_env(t)) && * !tmp_objdir_migrate(t)) * printf("success!\n"); @@ -22,9 +22,10 @@ struct tmp_objdir; /* - * Create a new temporary object directory; returns NULL on failure. + * Create a new temporary object directory with the specified prefix; + * returns NULL on failure. */ -struct tmp_objdir *tmp_objdir_create(void); +struct tmp_objdir *tmp_objdir_create(const char *prefix); /* * Return a list of environment strings, suitable for use with @@ -51,4 +52,26 @@ int tmp_objdir_destroy(struct tmp_objdir *); */ void tmp_objdir_add_as_alternate(const struct tmp_objdir *); +/* + * Replaces the writable object store in the current process with the temporary + * object directory and makes the former main object store an alternate. + * If will_destroy is nonzero, the object directory may not be migrated. + */ +void tmp_objdir_replace_primary_odb(struct tmp_objdir *, int will_destroy); + +/* + * If the primary object database was replaced by a temporary object directory, + * restore it to its original value while keeping the directory contents around. + * Returns NULL if the primary object database was not replaced. + */ +struct tmp_objdir *tmp_objdir_unapply_primary_odb(void); + +/* + * Reapplies the former primary temporary object database, after potentially + * changing its relative path. + */ +void tmp_objdir_reapply_primary_odb(struct tmp_objdir *, const char *old_cwd, + const char *new_cwd); + + #endif /* TMP_OBJDIR_H */ |