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+From: Mark Walters <markwalters1009@gmail.com>\r
+To: Austin Clements <amdragon@MIT.EDU>, notmuch@notmuchmail.org\r
+Subject: Re: [PATCH 07/11] emacs: Use notmuch tag --batch for large tag\r
+ queries\r
+In-Reply-To: <1381185201-25197-8-git-send-email-amdragon@mit.edu>\r
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+Date: Tue, 08 Oct 2013 08:27:12 +0100\r
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+\r
+On Mon, 07 Oct 2013, Austin Clements <amdragon@MIT.EDU> wrote:\r
+> (Unfortunately, it's difficult to first demonstrate this problem with\r
+> a known-broken test because modern Linux kernels have argument length\r
+> limits in the megabytes, which makes Emacs really slow!)\r
+> ---\r
+> emacs/notmuch-lib.el | 8 ++++++++\r
+> emacs/notmuch-tag.el | 12 ++++++++++--\r
+> test/emacs | 8 ++++++++\r
+> 3 files changed, 26 insertions(+), 2 deletions(-)\r
+>\r
+> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el\r
+> index 22156f1..348112b 100644\r
+> --- a/emacs/notmuch-lib.el\r
+> +++ b/emacs/notmuch-lib.el\r
+> @@ -261,6 +261,14 @@ user-friendly queries."\r
+> "Return a query that matches the message with id ID."\r
+> (concat "id:" (notmuch-escape-boolean-term id)))\r
+> \r
+> +(defun notmuch-hex-encode (str)\r
+> + "Hex-encode STR (e.g., as used by batch tagging).\r
+> +\r
+> +This replaces spaces, percents, and double quotes in STR with\r
+> +%NN where NN is the hexadecimal value of the character."\r
+> + (replace-regexp-in-string\r
+> + "[ %\"]" (lambda (match) (format "%%%02x" (aref match 0))) str))\r
+> +\r
+> ;;\r
+> \r
+> (defun notmuch-common-do-stash (text)\r
+> diff --git a/emacs/notmuch-tag.el b/emacs/notmuch-tag.el\r
+> index 064cfa8..a4eec14 100644\r
+> --- a/emacs/notmuch-tag.el\r
+> +++ b/emacs/notmuch-tag.el\r
+> @@ -242,6 +242,8 @@ from TAGS if present."\r
+> (error "Changed tag must be of the form `+this_tag' or `-that_tag'")))))\r
+> (sort result-tags 'string<)))\r
+> \r
+> +(defconst notmuch-tag-argument-limit 1000)\r
+> +\r
+\r
+Another triviality: I think this should have a doc string saying use\r
+batch tag if the query is longer than this.\r
+\r
+The other patches in the series up to this point LGTM.\r
+\r
+Mark\r
+\r
+\r
+> (defun notmuch-tag (query &optional tag-changes)\r
+> "Add/remove tags in TAG-CHANGES to messages matching QUERY.\r
+> \r
+> @@ -268,8 +270,14 @@ notmuch-after-tag-hook will be run."\r
+> tag-changes)\r
+> (unless (null tag-changes)\r
+> (run-hooks 'notmuch-before-tag-hook)\r
+> - (apply 'notmuch-call-notmuch-process "tag"\r
+> - (append tag-changes (list "--" query)))\r
+> + (if (<= (length query) notmuch-tag-argument-limit)\r
+> + (apply 'notmuch-call-notmuch-process "tag"\r
+> + (append tag-changes (list "--" query)))\r
+> + ;; Use batch tag mode to avoid argument length limitations\r
+> + (let ((batch-op (concat (mapconcat #'notmuch-hex-encode tag-changes " ")\r
+> + " -- " query)))\r
+> + (message "Batch tagging with %s" batch-op)\r
+> + (notmuch-call-notmuch-process :stdin-string batch-op "tag" "--batch")))\r
+> (run-hooks 'notmuch-after-tag-hook))\r
+> ;; in all cases we return tag-changes as a list\r
+> tag-changes)\r
+> diff --git a/test/emacs b/test/emacs\r
+> index 05295af..2917189 100755\r
+> --- a/test/emacs\r
+> +++ b/test/emacs\r
+> @@ -122,6 +122,14 @@ test_emacs "(notmuch-search \"$os_x_darwin_thread\")\r
+> output=$(notmuch search $os_x_darwin_thread | notmuch_search_sanitize)\r
+> test_expect_equal "$output" "thread:XXX 2009-11-18 [4/4] Jjgod Jiang, Alexander Botero-Lowry; [notmuch] Mac OS X/Darwin compatibility issues (inbox unread)"\r
+> \r
+> +test_begin_subtest "Add tag (large query)"\r
+> +# We use a long query to force us into batch mode and use a funny tag\r
+> +# that requires escaping for batch tagging.\r
+> +test_emacs "(notmuch-tag (concat \"$os_x_darwin_thread\" \" or \" (make-string notmuch-tag-argument-limit ?x)) \"+tag-from-%-large-query\")"\r
+> +output=$(notmuch search $os_x_darwin_thread | notmuch_search_sanitize)\r
+> +test_expect_equal "$output" "thread:XXX 2009-11-18 [4/4] Jjgod Jiang, Alexander Botero-Lowry; [notmuch] Mac OS X/Darwin compatibility issues (inbox tag-from-%-large-query unread)"\r
+> +notmuch tag -tag-from-%-large-query $os_x_darwin_thread\r
+> +\r
+> test_begin_subtest "notmuch-show: add single tag to single message"\r
+> test_emacs "(notmuch-show \"$os_x_darwin_thread\")\r
+> (execute-kbd-macro \"+tag-from-show-view\")"\r
+> -- \r
+> 1.8.4.rc3\r
+>\r
+> _______________________________________________\r
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+> notmuch@notmuchmail.org\r
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