From: Junio C Hamano <gitster@pobox.com>
To: git@vger.kernel.org
Subject: [PATCH v2 12/13] rerere: explain the remainder
Date: Tue, 30 Jun 2015 23:04:58 -0700 [thread overview]
Message-ID: <1435730699-9124-13-git-send-email-gitster@pobox.com> (raw)
In-Reply-To: <1435730699-9124-1-git-send-email-gitster@pobox.com>
Explain the internals of rerere as in-code comments, while
sprinkling "NEEDSWORK" comment to highlight iffy bits and
questionable assumptions.
This covers the codepath that implements "rerere gc" and "rerere
clear".
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
rerere.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/rerere.c b/rerere.c
index 3782be6..7ef951e 100644
--- a/rerere.c
+++ b/rerere.c
@@ -844,6 +844,9 @@ int rerere_forget(struct pathspec *pathspec)
return write_rr(&merge_rr, fd);
}
+/*
+ * Garbage collection support
+ */
static time_t rerere_created_at(const char *name)
{
struct stat st;
@@ -856,11 +859,19 @@ static time_t rerere_last_used_at(const char *name)
return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime;
}
+/*
+ * Remove the recorded resolution for a given conflict ID
+ */
static void unlink_rr_item(const char *name)
{
unlink(rerere_path(name, "thisimage"));
unlink(rerere_path(name, "preimage"));
unlink(rerere_path(name, "postimage"));
+ /*
+ * NEEDSWORK: what if this rmdir() fails? Wouldn't we then
+ * assume that we already have preimage recorded in
+ * do_plain_rerere()?
+ */
rmdir(git_path("rr-cache/%s", name));
}
@@ -880,6 +891,7 @@ void rerere_gc(struct string_list *rr)
dir = opendir(git_path("rr-cache"));
if (!dir)
die_errno("unable to open rr-cache directory");
+ /* Collect stale conflict IDs ... */
while ((e = readdir(dir))) {
if (is_dot_or_dotdot(e->d_name))
continue;
@@ -897,11 +909,19 @@ void rerere_gc(struct string_list *rr)
string_list_append(&to_remove, e->d_name);
}
closedir(dir);
+ /* ... and then remove them one-by-one */
for (i = 0; i < to_remove.nr; i++)
unlink_rr_item(to_remove.items[i].string);
string_list_clear(&to_remove, 0);
}
+/*
+ * During a conflict resolution, after "rerere" recorded the
+ * preimages, abandon them if the user did not resolve them or
+ * record their resolutions. And drop $GIT_DIR/MERGE_RR.
+ *
+ * NEEDSWORK: shouldn't we be calling this from "reset --hard"?
+ */
void rerere_clear(struct string_list *merge_rr)
{
int i;
--
2.5.0-rc0-209-g5e1f148
next prev parent reply other threads:[~2015-07-01 6:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-01 6:04 [PATCH v2 00/13] "rerere" minor clean-up Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 01/13] rerere: fix an off-by-one non-bug Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 02/13] rerere: plug conflict ID leaks Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 03/13] rerere: lift PATH_MAX limitation Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 04/13] rerere: write out each record of MERGE_RR in one go Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 05/13] rerere: report autoupdated paths only after actually updating them Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 06/13] rerere: drop want_sp parameter from is_cmarker() Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 07/13] rerere: stop looping unnecessarily Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 08/13] rerere: explain the rerere I/O abstraction Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 09/13] rerere: explain MERGE_RR management helpers Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 10/13] rerere: explain the primary codepath Junio C Hamano
2015-07-01 6:04 ` [PATCH v2 11/13] rerere: explain "rerere forget" codepath Junio C Hamano
2015-07-01 6:04 ` Junio C Hamano [this message]
2015-07-01 6:04 ` [PATCH v2 13/13] rerere: refactor "replay" part of do_plain_rerere() Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 00/18] "rerere" preparatory clean-up Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 01/18] rerere: fix an off-by-one non-bug Junio C Hamano
2015-07-24 19:46 ` Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 02/18] rerere: plug conflict ID leaks Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 03/18] rerere: lift PATH_MAX limitation Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 04/18] rerere: write out each record of MERGE_RR in one go Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 05/18] rerere: report autoupdated paths only after actually updating them Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 06/18] rerere: drop want_sp parameter from is_cmarker() Junio C Hamano
2015-07-18 8:24 ` Philip Oakley
2015-07-18 8:47 ` Eric Sunshine
2015-07-17 22:24 ` [PATCH v3 07/18] rerere: stop looping unnecessarily Junio C Hamano
2015-07-24 20:06 ` Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 08/18] rerere: explain the rerere I/O abstraction Junio C Hamano
2015-07-24 20:42 ` Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 09/18] rerere: explain MERGE_RR management helpers Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 10/18] rerere: explain the primary codepath Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 11/18] rerere: explain "rerere forget" codepath Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 12/18] rerere: explain the remainder Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 13/18] rerere: refactor "replay" part of do_plain_rerere() Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 14/18] rerere: further de-dent do_plain_rerere() Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 15/18] rerere: further clarify do_rerere_one_path() Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 16/18] rerere: call conflict-ids IDs Junio C Hamano
2015-07-17 22:24 ` [PATCH v3 17/18] rerere: use "struct rerere_id" instead of "char *" for conflict ID Junio C Hamano
2015-07-18 8:47 ` Eric Sunshine
2015-07-17 22:24 ` [PATCH v3 18/18] rerere: un-nest merge() further Junio C Hamano
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