From 1c3039e8f1eb01766cff976793c8f439095967f6 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Lukas=5FSandstr=C3=B6m?= Date: Fri, 11 Nov 2005 01:25:04 +0100 Subject: [PATCH] Make git-pack-redundant consider alt-odbs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This patch changes git-pack-redundant so that packfiles in alternate object directories also are considered when deciding which objects are redundant. This functionality is controlled by the flag '--alt-odb'. Also convert the other flags to the long form, and update docs and git-repack accordingly. Signed-off-by: Lukas Sandström Signed-off-by: Junio C Hamano --- Documentation/git-pack-redundant.txt | 17 ++-- git-repack.sh | 4 +- pack-redundant.c | 147 +++++++++++++++++---------- 3 files changed, 106 insertions(+), 62 deletions(-) diff --git a/Documentation/git-pack-redundant.txt b/Documentation/git-pack-redundant.txt index 55c0d48bf..5ba927283 100644 --- a/Documentation/git-pack-redundant.txt +++ b/Documentation/git-pack-redundant.txt @@ -8,7 +8,7 @@ git-pack-redundant - Program used to find redundant pack files. SYNOPSIS -------- -'git-pack-redundant [ -v ] < -a | .pack filename ... >' +'git-pack-redundant [ --verbose ] [ --alt-odb ] < --all | .pack filename ... >' DESCRIPTION ----------- @@ -19,13 +19,16 @@ are redundant. The output is suitable for piping to OPTIONS ------- --v:: - Verbose. Outputs some statistics to stderr. - Has a small performance penalty. --a:: - All. Processes all the local packs. Any filenames on - the commandline are ignored. +--all:: + Processes all packs. Any filenames on the commandline are ignored. + +--alt-odb:: + Don't require objects present in packs from alternate object + directories to be present in local packs. + +--verbose:: + Outputs some statistics to stderr. Has a small performance penalty. Author ------ diff --git a/git-repack.sh b/git-repack.sh index 4ce00225d..f34720701 100755 --- a/git-repack.sh +++ b/git-repack.sh @@ -45,7 +45,7 @@ if [ -z "$name" ]; then if test "$remove_redandant" = t ; then echo "Removing redundant packs." sync - redundant=$(git-pack-redundant -a) + redundant=$(git-pack-redundant --all) if test "$redundant" != "" ; then echo $redundant | xargs rm fi @@ -63,7 +63,7 @@ exit if test "$remove_redandant" = t then sync - redundant=$(git-pack-redundant -a) + redundant=$(git-pack-redundant --all) if test "$redundant" != "" ; then echo $redundant | xargs rm fi diff --git a/pack-redundant.c b/pack-redundant.c index db3dcde22..1f8c57739 100644 --- a/pack-redundant.c +++ b/pack-redundant.c @@ -9,9 +9,9 @@ #include "cache.h" static const char pack_redundant_usage[] = -"git-pack-redundant [ -v ] < -a | <.pack filename> ...>"; +"git-pack-redundant [ --verbose ] [ --alt-odb ] < --all | <.pack filename> ...>"; -int all = 0, verbose = 0; +int load_all_packs = 0, verbose = 0, alt_odb = 0; struct llist_item { struct llist_item *next; @@ -21,14 +21,14 @@ struct llist { struct llist_item *front; struct llist_item *back; size_t size; -} *all_objects; +} *all_objects; /* all objects which must be present in local packfiles */ struct pack_list { struct pack_list *next; struct packed_git *pack; struct llist *unique_objects; struct llist *all_objects; -} *pack_list; +} *local_packs = NULL, *altodb_packs = NULL; struct pll { struct pll *next; @@ -128,32 +128,35 @@ inline struct llist_item * llist_insert_sorted_unique(struct llist *list, } /* computes A\B */ -struct llist * llist_sorted_difference(struct llist_item *A, - struct llist_item *B) +void llist_sorted_difference_inplace(struct llist *A, + struct llist *B) { - struct llist *ret; - llist_init(&ret); + struct llist_item *prev, *a, *b, *x; - while (A != NULL && B != NULL) { - int cmp = memcmp(A->sha1, B->sha1, 20); + prev = a = A->front; + b = B->front; + + while (a != NULL && b != NULL) { + int cmp = memcmp(a->sha1, b->sha1, 20); if (!cmp) { - A = A->next; - B = B->next; - continue; - } - if(cmp > 0) { /* we'll never find this B */ - B = B->next; - continue; - } - /* A has the object, B doesn't */ - llist_insert_back(ret, A->sha1); - A = A->next; - } - while (A != NULL) { - llist_insert_back(ret, A->sha1); - A = A->next; + x = a; + if (a == A->front) + A->front = a->next; + a = prev->next = a->next; + + if (a == NULL) /* end of list */ + A->back = prev; + A->size--; + free(x); + b = b->next; + } else + if (cmp > 0) + b = b->next; + else { + prev = a; + a = a->next; + } } - return ret; } /* returns a pointer to an item in front of sha1 */ @@ -201,6 +204,16 @@ inline struct pack_list * pack_list_insert(struct pack_list **pl, return p; } +inline size_t pack_list_size(struct pack_list *pl) +{ + size_t ret = 0; + while(pl) { + ret++; + pl = pl->next; + } + return ret; +} + struct pack_list * pack_list_difference(struct pack_list *A, struct pack_list *B) { @@ -294,15 +307,13 @@ struct pll * get_all_permutations(struct pack_list *list) int is_superset(struct pack_list *pl, struct llist *list) { - struct llist *diff, *old; + struct llist *diff; diff = llist_copy(list); while (pl) { - old = diff; - diff = llist_sorted_difference(diff->front, - pl->all_objects->front); - llist_free(old); + llist_sorted_difference_inplace(diff, + pl->all_objects); if (diff->size == 0) { /* we're done */ llist_free(diff); return 1; @@ -347,6 +358,10 @@ size_t sizeof_union(struct packed_git *p1, struct packed_git *p2) size_t get_pack_redundancy(struct pack_list *pl) { struct pack_list *subset; + + if (pl == NULL) + return 0; + size_t ret = 0; while ((subset = pl->next)) { while(subset) { @@ -374,10 +389,10 @@ void minimize(struct pack_list **min) struct pack_list *pl, *unique = NULL, *non_unique = NULL, *min_perm = NULL; struct pll *perm, *perm_all, *perm_ok = NULL, *new_perm; - struct llist *missing, *old; + struct llist *missing; size_t min_perm_size = (size_t)-1, perm_size; - pl = pack_list; + pl = local_packs; while (pl) { if(pl->unique_objects->size) pack_list_insert(&unique, pl); @@ -389,13 +404,12 @@ void minimize(struct pack_list **min) missing = llist_copy(all_objects); pl = unique; while (pl) { - old = missing; - missing = llist_sorted_difference(missing->front, - pl->all_objects->front); - llist_free(old); + llist_sorted_difference_inplace(missing, + pl->all_objects); pl = pl->next; } + /* return if there are no objects missing from the unique set */ if (missing->size == 0) { *min = unique; return; @@ -437,7 +451,7 @@ void minimize(struct pack_list **min) void load_all_objects() { - struct pack_list *pl = pack_list; + struct pack_list *pl = local_packs; struct llist_item *hint, *l; int i; @@ -454,17 +468,34 @@ void load_all_objects() } pl = pl->next; } + /* remove objects present in remote packs */ + pl = altodb_packs; + while (pl) { + llist_sorted_difference_inplace(all_objects, pl->all_objects); + pl = pl->next; + } } /* this scales like O(n^2) */ void cmp_packs() { - struct pack_list *subset, *curr = pack_list; + struct pack_list *subset, *pl = local_packs; - while ((subset = curr)) { + while ((subset = pl)) { while((subset = subset->next)) - cmp_two_packs(curr, subset); - curr = curr->next; + cmp_two_packs(pl, subset); + pl = pl->next; + } + + pl = altodb_packs; + while (pl) { + subset = local_packs; + while (subset) { + llist_sorted_difference_inplace(subset->unique_objects, + pl->all_objects); + subset = subset->next; + } + pl = pl->next; } } @@ -485,7 +516,10 @@ struct pack_list * add_pack(struct packed_git *p) } /* this list will be pruned in cmp_two_packs later */ l.unique_objects = llist_copy(l.all_objects); - return pack_list_insert(&pack_list, &l); + if (p->pack_local) + return pack_list_insert(&local_packs, &l); + else + return alt_odb ? pack_list_insert(&altodb_packs, &l) : NULL; } struct pack_list * add_pack_file(char *filename) @@ -497,7 +531,6 @@ struct pack_list * add_pack_file(char *filename) while (p) { if (strstr(p->pack_name, filename)) - /* this will silently ignore packs in alt-odb */ return add_pack(p); p = p->next; } @@ -509,8 +542,7 @@ void load_all() struct packed_git *p = packed_git; while (p) { - if (p->pack_local) /* ignore alt-odb for now */ - add_pack(p); + add_pack(p); p = p->next; } } @@ -526,14 +558,18 @@ int main(int argc, char **argv) i++; break; } - if(!strcmp(arg, "-a")) { - all = 1; + if(!strcmp(arg, "--all")) { + load_all_packs = 1; continue; } - if(!strcmp(arg, "-v")) { + if(!strcmp(arg, "--verbose")) { verbose = 1; continue; } + if(!strcmp(arg, "--alt-odb")) { + alt_odb = 1; + continue; + } if(*arg == '-') usage(pack_redundant_usage); else @@ -542,13 +578,13 @@ int main(int argc, char **argv) prepare_packed_git(); - if(all) + if (load_all_packs) load_all(); else while (*(argv + i) != NULL) add_pack_file(*(argv + i++)); - if (pack_list == NULL) + if (local_packs == NULL) die("Zero packs found!\n"); cmp_packs(); @@ -557,6 +593,8 @@ int main(int argc, char **argv) minimize(&min); if (verbose) { + fprintf(stderr, "There are %ld packs available in alt-odbs.\n", + pack_list_size(altodb_packs)); fprintf(stderr, "The smallest (bytewise) set of packs is:\n"); pl = min; while (pl) { @@ -566,12 +604,15 @@ int main(int argc, char **argv) fprintf(stderr, "containing %ld duplicate objects " "with a total size of %ldkb.\n", get_pack_redundancy(min), pack_set_bytecount(min)/1024); + fprintf(stderr, "A total of %ld unique objects were considered.\n", + all_objects->size); fprintf(stderr, "Redundant packs (with indexes):\n"); } - pl = red = pack_list_difference(pack_list, min); + pl = red = pack_list_difference(local_packs, min); while (pl) { printf("%s\n%s\n", - sha1_pack_index_name(pl->pack->sha1), pl->pack->pack_name); + sha1_pack_index_name(pl->pack->sha1), + pl->pack->pack_name); pl = pl->next; } -- 2.26.2