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Option to ignore sessions only #79

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Option to ignore sessions only #79

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13 changes: 13 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,19 @@ Example:
For additional context, see
https://github.com/astahlman/ob-async/pull/35.

### ob-async-ignore-sessions

This variable allows using `ob-async` for nonsession blocks, while
using alternative `:async` implementations for session blocks. This
may be useful for languages like `ob-python` and `ob-R`, which have
built-in `:async` implementations for sessions, but don't handle
`:async` for nonsessions.

This variable can be a list, in which case it is like
`ob-async-no-async-languages-alist` but for sessions
only. Alternatively, it can be set to `t` to have `ob-async` always
ignore session blocks.

### ob-async-pre-execute-src-block-hook

Some org-babel languages require additional user configuration. For
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14 changes: 14 additions & 0 deletions ob-async.el
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Expand Up @@ -43,6 +43,12 @@
compatibility for other languages, e.g. ipython, for which async
functionality may be implemented separately.")

(defvar ob-async-ignore-sessions '("python" "R")
"Don't try to use async in sessions for these languages.
Like `ob-async-no-async-languages-alist', but only for
sessions. Can alternatively be set to `t', in which case ob-async
ignores sessions for all languages.")

(defvar ob-async-pre-execute-src-block-hook nil
"Hook run in the async child process prior to executing a src
block. You can use this hook to perform language-specific
Expand Down Expand Up @@ -85,6 +91,14 @@ block."
;; If there is no :async parameter, call the original function
((not (assoc :async (nth 2 (or info (org-babel-get-src-block-info)))))
(funcall orig-fun arg info params))
;; If a session, check ob-async-ignore-sessions to determine
;; whether to call the original function
((and (assoc :session (nth 2 (or info (org-babel-get-src-block-info))))
(or (equal ob-async-ignore-sessions t)
(and (listp ob-async-ignore-sessions)
(member (nth 0 (or info (org-babel-get-src-block-info)))
ob-async-ignore-sessions))))
(funcall orig-fun arg info params))
;; If the src block language is in the list of languages async is not to be
;; used for, call the original function
((member (nth 0 (or info (org-babel-get-src-block-info)))
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