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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH v2] inbox: add `modified' sub
Date: Wed, 17 Apr 2019 19:35:06 +0000	[thread overview]
Message-ID: <20190417193506.6gradvjye5jvxeu5@dcvr> (raw)
In-Reply-To: <20190417114358.ab2hsmzo7eeehghs@dcvr>

>  but mtime may be worth considering over ctime, too...
>  (somebody could be using atomic-rsync on the SQLite and Xapian
>   stuff because indexing is slow)

-------8<----------
Subject: [PATCH] inbox: add `modified' sub

For inboxes with SQLite enabled (all v2, and probably most v1);
stat-ing the msgmap.sqlite3 file is a much faster way of telling
when an inbox is modified compared to scanning git branches.

v2: use mtime instead of ctime for users who use generic tools
    to copy SQLite DBs.
---
 lib/PublicInbox/Inbox.pm | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/PublicInbox/Inbox.pm b/lib/PublicInbox/Inbox.pm
index cde4625..c004f25 100644
--- a/lib/PublicInbox/Inbox.pm
+++ b/lib/PublicInbox/Inbox.pm
@@ -333,4 +333,20 @@ sub recent {
 	search($self)->{over_ro}->recent($opts, $after, $before);
 }
 
+sub modified {
+	my ($self) = @_;
+	my $dir = $self->{mainrepo};
+	my @st;
+	if ($self->{version} >= 2) {
+		@st = stat("$dir/msgmap.sqlite3")
+	} elsif (-f "$dir/public-inbox/msgmap.sqlite3") { # v1
+		@st = stat(_);
+	} else { # v1 repos did not need sqlite3
+		return git($self)->modified;
+	}
+	# we favor 9/mtime over ctime since it should be possible to
+	# use generic tools such as atomic-rsync to copy SQLite DBs
+	@st ? $st[9] : time;
+}
+
 1;
-- 
EW

  reply	other threads:[~2019-04-17 19:35 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-17 11:43 [RFC] inbox: add `modified' sub Eric Wong
2019-04-17 19:35 ` Eric Wong [this message]
2019-04-18  0:58   ` [PATCH v3] " Eric Wong
2019-04-18  8:07     ` [PATCH v4] " Eric Wong

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