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@xxxxxxxxxxxxxx>
---
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
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