[PATCH] git gc --auto: defer on battery
- From
Miklos Vajna <vmiklos@frugalware.org>
- Date
- Mar 30, 2008, 23:14 UTC
- Message-ID
- <20080330231408.GR11666@genesis>
This patch modifies git gc --auto so that it will not always repack when a user is on battery.
It introduces the new gc.deferonbattery configuration variable, which defaults to true. If it's true and the user is on battery, it will not run git gc --auto.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> ---
Idea is from e2fsprogs, such a repack may take a lot of time and usually you don't have infinite time when you are on battery.. :)
If the patch looks OK, just it's too late for 1.5.5, then please let me know and I'll resend after 1.5.5.
Thanks.
Documentation/git-gc.txt | 4 +++ builtin-gc.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt index d424a4e..7d54148 100644 --- a/Documentation/git-gc.txt +++ b/Documentation/git-gc.txt @@ -104,6 +104,10 @@ The optional configuration variable 'gc.pruneExpire' controls how old the unreferenced loose objects have to be before they are pruned. The default is "2 weeks ago". +The optional configuration variable 'gc.deferonbattery' determines if +`git gc --auto` should be disabled if the system is running on battery. +This defaults to true. + See Also -------- linkgit:git-prune[1] diff --git a/builtin-gc.c b/builtin-gc.c index 8cef36f..7beb046 100644 --- a/builtin-gc.c +++ b/builtin-gc.c @@ -23,6 +23,7 @@ static const char * const builtin_gc_usage[] = { }; static int pack_refs = 1; +static int defer_on_battery = 1; static int aggressive_window = -1; static int gc_auto_threshold = 6700; static int gc_auto_pack_limit = 50; @@ -67,6 +68,10 @@ static int gc_config(const char *var, const char *value) prune_expire = xstrdup(value); return 0; } + if (!strcmp(var, "gc.deferonbattery")) { + defer_on_battery = git_config_bool(var, value); + return 0; + } return git_default_config(var, value); } @@ -157,6 +162,45 @@ static int too_many_packs(void) return gc_auto_pack_limit <= cnt; } +static int is_on_battery(void) +{ + FILE *fp; + DIR *dir; + char buf[256], state[256], path[256]; + unsigned int ac = 0; + struct dirent* entry; + + if (!defer_on_battery) + return 0; + + if ((fp = fopen("/proc/apm", "r"))) { + if (fscanf(fp, "%s %s %s %x", buf, buf, buf, &ac) != 4) + ac = 1; + fclose(fp); + return ac != 1; + } + if((dir = opendir("/proc/acpi/ac_adapter"))) { + while ((entry = readdir(dir))) { + if (!strcmp(".", entry->d_name) || !strcmp("..", + entry->d_name)) + continue; + snprintf(path, 255, "/proc/acpi/ac_adapter/%s/state", + entry->d_name); + if ((fp = fopen(path, "r"))) { + if (fscanf(fp, "%s %s", buf, state) != 2) + state[0] = '\0'; + fclose(fp); + if (!strncmp(state, "off-line", 8)) { + closedir(dir); + return 1; + } + } + } + closedir(dir); + } + return 0; +} + static int need_to_gc(void) { /* @@ -176,6 +220,11 @@ static int need_to_gc(void) append_option(argv_repack, "-A", MAX_ADD); else if (!too_many_loose_objects()) return 0; + + if(is_on_battery()) { + fprintf(stderr, "Auto packing deferred; on battery"); + return 0; + } return 1; }
-- 1.5.4.5