From 81b50f3ce40bfdd66e5d967bf82be001039a9a98 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 22 Feb 2010 08:42:18 -0800 Subject: Move 'builtin-*' into a 'builtin/' subdirectory This shrinks the top-level directory a bit, and makes it much more pleasant to use auto-completion on the thing. Instead of [torvalds@nehalem git]$ em buil Display all 180 possibilities? (y or n) [torvalds@nehalem git]$ em builtin-sh builtin-shortlog.c builtin-show-branch.c builtin-show-ref.c builtin-shortlog.o builtin-show-branch.o builtin-show-ref.o [torvalds@nehalem git]$ em builtin-shor builtin-shortlog.c builtin-shortlog.o [torvalds@nehalem git]$ em builtin-shortlog.c you get [torvalds@nehalem git]$ em buil [type] builtin/ builtin.h [torvalds@nehalem git]$ em builtin [auto-completes to] [torvalds@nehalem git]$ em builtin/sh [type] shortlog.c shortlog.o show-branch.c show-branch.o show-ref.c show-ref.o [torvalds@nehalem git]$ em builtin/sho [auto-completes to] [torvalds@nehalem git]$ em builtin/shor [type] shortlog.c shortlog.o [torvalds@nehalem git]$ em builtin/shortlog.c which doesn't seem all that different, but not having that annoying break in "Display all 180 possibilities?" is quite a relief. NOTE! If you do this in a clean tree (no object files etc), or using an editor that has auto-completion rules that ignores '*.o' files, you won't see that annoying 'Display all 180 possibilities?' message - it will just show the choices instead. I think bash has some cut-off around 100 choices or something. So the reason I see this is that I'm using an odd editory, and thus don't have the rules to cut down on auto-completion. But you can simulate that by using 'ls' instead, or something similar. Signed-off-by: Linus Torvalds Signed-off-by: Junio C Hamano --- builtin/gc.c | 255 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 255 insertions(+) create mode 100644 builtin/gc.c (limited to 'builtin/gc.c') diff --git a/builtin/gc.c b/builtin/gc.c new file mode 100644 index 000000000..c304638b7 --- /dev/null +++ b/builtin/gc.c @@ -0,0 +1,255 @@ +/* + * git gc builtin command + * + * Cleanup unreachable files and optimize the repository. + * + * Copyright (c) 2007 James Bowes + * + * Based on git-gc.sh, which is + * + * Copyright (c) 2006 Shawn O. Pearce + */ + +#include "builtin.h" +#include "cache.h" +#include "parse-options.h" +#include "run-command.h" + +#define FAILED_RUN "failed to run %s" + +static const char * const builtin_gc_usage[] = { + "git gc [options]", + NULL +}; + +static int pack_refs = 1; +static int aggressive_window = 250; +static int gc_auto_threshold = 6700; +static int gc_auto_pack_limit = 50; +static const char *prune_expire = "2.weeks.ago"; + +#define MAX_ADD 10 +static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL}; +static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL}; +static const char *argv_repack[MAX_ADD] = {"repack", "-d", "-l", NULL}; +static const char *argv_prune[] = {"prune", "--expire", NULL, NULL}; +static const char *argv_rerere[] = {"rerere", "gc", NULL}; + +static int gc_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "gc.packrefs")) { + if (value && !strcmp(value, "notbare")) + pack_refs = -1; + else + pack_refs = git_config_bool(var, value); + return 0; + } + if (!strcmp(var, "gc.aggressivewindow")) { + aggressive_window = git_config_int(var, value); + return 0; + } + if (!strcmp(var, "gc.auto")) { + gc_auto_threshold = git_config_int(var, value); + return 0; + } + if (!strcmp(var, "gc.autopacklimit")) { + gc_auto_pack_limit = git_config_int(var, value); + return 0; + } + if (!strcmp(var, "gc.pruneexpire")) { + if (value && strcmp(value, "now")) { + unsigned long now = approxidate("now"); + if (approxidate(value) >= now) + return error("Invalid %s: '%s'", var, value); + } + return git_config_string(&prune_expire, var, value); + } + return git_default_config(var, value, cb); +} + +static void append_option(const char **cmd, const char *opt, int max_length) +{ + int i; + + for (i = 0; cmd[i]; i++) + ; + + if (i + 2 >= max_length) + die("Too many options specified"); + cmd[i++] = opt; + cmd[i] = NULL; +} + +static int too_many_loose_objects(void) +{ + /* + * Quickly check if a "gc" is needed, by estimating how + * many loose objects there are. Because SHA-1 is evenly + * distributed, we can check only one and get a reasonable + * estimate. + */ + char path[PATH_MAX]; + const char *objdir = get_object_directory(); + DIR *dir; + struct dirent *ent; + int auto_threshold; + int num_loose = 0; + int needed = 0; + + if (gc_auto_threshold <= 0) + return 0; + + if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) { + warning("insanely long object directory %.*s", 50, objdir); + return 0; + } + dir = opendir(path); + if (!dir) + return 0; + + auto_threshold = (gc_auto_threshold + 255) / 256; + while ((ent = readdir(dir)) != NULL) { + if (strspn(ent->d_name, "0123456789abcdef") != 38 || + ent->d_name[38] != '\0') + continue; + if (++num_loose > auto_threshold) { + needed = 1; + break; + } + } + closedir(dir); + return needed; +} + +static int too_many_packs(void) +{ + struct packed_git *p; + int cnt; + + if (gc_auto_pack_limit <= 0) + return 0; + + prepare_packed_git(); + for (cnt = 0, p = packed_git; p; p = p->next) { + if (!p->pack_local) + continue; + if (p->pack_keep) + continue; + /* + * Perhaps check the size of the pack and count only + * very small ones here? + */ + cnt++; + } + return gc_auto_pack_limit <= cnt; +} + +static int need_to_gc(void) +{ + /* + * Setting gc.auto to 0 or negative can disable the + * automatic gc. + */ + if (gc_auto_threshold <= 0) + return 0; + + /* + * If there are too many loose objects, but not too many + * packs, we run "repack -d -l". If there are too many packs, + * we run "repack -A -d -l". Otherwise we tell the caller + * there is no need. + */ + if (too_many_packs()) + append_option(argv_repack, + prune_expire && !strcmp(prune_expire, "now") ? + "-a" : "-A", + MAX_ADD); + else if (!too_many_loose_objects()) + return 0; + + if (run_hook(NULL, "pre-auto-gc", NULL)) + return 0; + return 1; +} + +int cmd_gc(int argc, const char **argv, const char *prefix) +{ + int aggressive = 0; + int auto_gc = 0; + int quiet = 0; + char buf[80]; + + struct option builtin_gc_options[] = { + OPT__QUIET(&quiet), + { OPTION_STRING, 0, "prune", &prune_expire, "date", + "prune unreferenced objects", + PARSE_OPT_OPTARG, NULL, (intptr_t)prune_expire }, + OPT_BOOLEAN(0, "aggressive", &aggressive, "be more thorough (increased runtime)"), + OPT_BOOLEAN(0, "auto", &auto_gc, "enable auto-gc mode"), + OPT_END() + }; + + git_config(gc_config, NULL); + + if (pack_refs < 0) + pack_refs = !is_bare_repository(); + + argc = parse_options(argc, argv, prefix, builtin_gc_options, + builtin_gc_usage, 0); + if (argc > 0) + usage_with_options(builtin_gc_usage, builtin_gc_options); + + if (aggressive) { + append_option(argv_repack, "-f", MAX_ADD); + append_option(argv_repack, "--depth=250", MAX_ADD); + if (aggressive_window > 0) { + sprintf(buf, "--window=%d", aggressive_window); + append_option(argv_repack, buf, MAX_ADD); + } + } + if (quiet) + append_option(argv_repack, "-q", MAX_ADD); + + if (auto_gc) { + /* + * Auto-gc should be least intrusive as possible. + */ + if (!need_to_gc()) + return 0; + fprintf(stderr, + "Auto packing the repository for optimum performance.%s\n", + quiet + ? "" + : (" You may also\n" + "run \"git gc\" manually. See " + "\"git help gc\" for more information.")); + } else + append_option(argv_repack, + prune_expire && !strcmp(prune_expire, "now") + ? "-a" : "-A", + MAX_ADD); + + if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD)) + return error(FAILED_RUN, argv_pack_refs[0]); + + if (run_command_v_opt(argv_reflog, RUN_GIT_CMD)) + return error(FAILED_RUN, argv_reflog[0]); + + if (run_command_v_opt(argv_repack, RUN_GIT_CMD)) + return error(FAILED_RUN, argv_repack[0]); + + if (prune_expire) { + argv_prune[2] = prune_expire; + if (run_command_v_opt(argv_prune, RUN_GIT_CMD)) + return error(FAILED_RUN, argv_prune[0]); + } + + if (run_command_v_opt(argv_rerere, RUN_GIT_CMD)) + return error(FAILED_RUN, argv_rerere[0]); + + if (auto_gc && too_many_loose_objects()) + warning("There are too many unreachable loose objects; " + "run 'git prune' to remove them."); + + return 0; +} -- cgit v1.2.1