[PATCH 07/11] emacs: Use notmuch tag --batch for large tag queries
Mark Walters
markwalters1009 at gmail.com
Wed Oct 9 00:38:36 PDT 2013
On Wed, 09 Oct 2013, Jani Nikula <jani at nikula.org> wrote:
> On Tue, 08 Oct 2013, Austin Clements <amdragon at MIT.EDU> wrote:
>> (Unfortunately, it's difficult to first demonstrate this problem with
>> a known-broken test because modern Linux kernels have argument length
>> limits in the megabytes, which makes Emacs really slow!)
>> ---
>> emacs/notmuch-lib.el | 8 ++++++++
>> emacs/notmuch-tag.el | 12 ++++++++++--
>> test/emacs | 8 ++++++++
>> 3 files changed, 26 insertions(+), 2 deletions(-)
>>
>> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
>> index 22156f1..348112b 100644
>> --- a/emacs/notmuch-lib.el
>> +++ b/emacs/notmuch-lib.el
>> @@ -261,6 +261,14 @@ user-friendly queries."
>> "Return a query that matches the message with id ID."
>> (concat "id:" (notmuch-escape-boolean-term id)))
>>
>> +(defun notmuch-hex-encode (str)
>> + "Hex-encode STR (e.g., as used by batch tagging).
>> +
>> +This replaces spaces, percents, and double quotes in STR with
>> +%NN where NN is the hexadecimal value of the character."
>> + (replace-regexp-in-string
>> + "[ %\"]" (lambda (match) (format "%%%02x" (aref match 0))) str))
>> +
>> ;;
>>
>> (defun notmuch-common-do-stash (text)
>> diff --git a/emacs/notmuch-tag.el b/emacs/notmuch-tag.el
>> index 064cfa8..a4eec14 100644
>> --- a/emacs/notmuch-tag.el
>> +++ b/emacs/notmuch-tag.el
>> @@ -242,6 +242,8 @@ from TAGS if present."
>> (error "Changed tag must be of the form `+this_tag' or `-that_tag'")))))
>> (sort result-tags 'string<)))
>>
>> +(defconst notmuch-tag-argument-limit 1000)
>> +
>> (defun notmuch-tag (query &optional tag-changes)
>> "Add/remove tags in TAG-CHANGES to messages matching QUERY.
>>
>> @@ -268,8 +270,14 @@ notmuch-after-tag-hook will be run."
>> tag-changes)
>> (unless (null tag-changes)
>> (run-hooks 'notmuch-before-tag-hook)
>> - (apply 'notmuch-call-notmuch-process "tag"
>> - (append tag-changes (list "--" query)))
>> + (if (<= (length query) notmuch-tag-argument-limit)
>> + (apply 'notmuch-call-notmuch-process "tag"
>> + (append tag-changes (list "--" query)))
>> + ;; Use batch tag mode to avoid argument length limitations
>> + (let ((batch-op (concat (mapconcat #'notmuch-hex-encode tag-changes " ")
>> + " -- " query)))
>> + (message "Batch tagging with %s" batch-op)
>
> Why the message?
>
> Jani.
I had missed that: this message is presumably for debugging as it
includes the (possibly megabyte sized) query. I think some message would
be sensible as this could be a slow operation so it's probably worth
telling the user why the interface has locked.
Best wishes
Mark
>
>> + (notmuch-call-notmuch-process :stdin-string batch-op "tag" "--batch")))
>> (run-hooks 'notmuch-after-tag-hook))
>> ;; in all cases we return tag-changes as a list
>> tag-changes)
>> diff --git a/test/emacs b/test/emacs
>> index 05295af..2917189 100755
>> --- a/test/emacs
>> +++ b/test/emacs
>> @@ -122,6 +122,14 @@ test_emacs "(notmuch-search \"$os_x_darwin_thread\")
>> output=$(notmuch search $os_x_darwin_thread | notmuch_search_sanitize)
>> test_expect_equal "$output" "thread:XXX 2009-11-18 [4/4] Jjgod Jiang, Alexander Botero-Lowry; [notmuch] Mac OS X/Darwin compatibility issues (inbox unread)"
>>
>> +test_begin_subtest "Add tag (large query)"
>> +# We use a long query to force us into batch mode and use a funny tag
>> +# that requires escaping for batch tagging.
>> +test_emacs "(notmuch-tag (concat \"$os_x_darwin_thread\" \" or \" (make-string notmuch-tag-argument-limit ?x)) \"+tag-from-%-large-query\")"
>> +output=$(notmuch search $os_x_darwin_thread | notmuch_search_sanitize)
>> +test_expect_equal "$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)"
>> +notmuch tag -tag-from-%-large-query $os_x_darwin_thread
>> +
>> test_begin_subtest "notmuch-show: add single tag to single message"
>> test_emacs "(notmuch-show \"$os_x_darwin_thread\")
>> (execute-kbd-macro \"+tag-from-show-view\")"
>> --
>> 1.8.4.rc3
>>
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