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ob-core.el
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;;; ob-core.el --- Working with Code Blocks -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2025 Free Software Foundation, Inc.
;; Authors: Eric Schulte
;; Dan Davison
;; Keywords: literate programming, reproducible research
;; URL: https://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'org-macs)
(org-assert-version)
(require 'cl-lib)
(require 'ob-eval)
(require 'org-macs)
(require 'org-fold)
(require 'org-compat)
(require 'org-cycle)
(defconst org-babel-exeext
(if (memq system-type '(windows-nt cygwin))
".exe"
nil))
(defvar org-babel-library-of-babel)
(defvar org-edit-src-content-indentation)
(defvar org-link-file-path-type)
(defvar org-src-lang-modes)
(defvar org-babel-tangle-uncomment-comments)
(declare-function org-attach-dir "org-attach" (&optional create-if-not-exists-p no-fs-check))
(declare-function org-at-item-p "org-list" ())
(declare-function org-at-table-p "org" (&optional table-type))
(declare-function org-babel-lob-execute-maybe "ob-lob" ())
(declare-function org-babel-ref-goto-headline-id "ob-ref" (id))
(declare-function org-babel-ref-headline-body "ob-ref" ())
(declare-function org-babel-ref-parse "ob-ref" (assignment))
(declare-function org-babel-ref-resolve "ob-ref" (ref))
(declare-function org-babel-ref-split-args "ob-ref" (arg-string))
(declare-function org-babel-tangle-comment-links "ob-tangle" (&optional info))
(declare-function org-current-level "org" ())
(declare-function org-cycle "org-cycle" (&optional arg))
(declare-function org-edit-src-code "org-src" (&optional code edit-buffer-name))
(declare-function org-edit-src-exit "org-src" ())
(declare-function org-src-preserve-indentation-p "org-src" (node))
(declare-function org-element-at-point "org-element" (&optional pom cached-only))
(declare-function org-element-at-point-no-context "org-element" (&optional pom))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-normalize-string "org-element" (s))
(declare-function org-element-property "org-element-ast" (property node))
(declare-function org-element-begin "org-element" (node))
(declare-function org-element-end "org-element" (node))
(declare-function org-element-post-affiliated "org-element" (node))
(declare-function org-element-contents-begin "org-element" (node))
(declare-function org-element-contents-end "org-element" (node))
(declare-function org-element-parent "org-element-ast" (node))
(declare-function org-element-type "org-element-ast" (node &optional anonymous))
(declare-function org-element-type-p "org-element-ast" (node &optional types))
(declare-function org-element-interpret-data "org-element" (data))
(declare-function org-entry-get "org" (pom property &optional inherit literal-nil))
(declare-function org-escape-code-in-region "org-src" (beg end))
(declare-function org-forward-heading-same-level "org" (arg &optional invisible-ok))
(declare-function org-in-commented-heading-p "org" (&optional no-inheritance))
(declare-function org-indent-block "org" ())
(declare-function org-indent-line "org" ())
(declare-function org-list-get-list-end "org-list" (item struct prevs))
(declare-function org-list-prevs-alist "org-list" (struct))
(declare-function org-list-struct "org-list" ())
(declare-function org-list-to-generic "org-list" (LIST PARAMS))
(declare-function org-list-to-lisp "org-list" (&optional delete))
(declare-function org-list-to-org "org-list" (list &optional params))
(declare-function org-macro-escape-arguments "org-macro" (&rest args))
(declare-function org-mark-ring-push "org" (&optional pos buffer))
(declare-function org-narrow-to-subtree "org" (&optional element))
(declare-function org-next-block "org" (arg &optional backward block-regexp))
(declare-function org-open-at-point "org" (&optional in-emacs reference-buffer))
(declare-function org-previous-block "org" (arg &optional block-regexp))
(declare-function org-fold-show-context "org-fold" (&optional key))
(declare-function org-src-coderef-format "org-src" (&optional element))
(declare-function org-src-coderef-regexp "org-src" (fmt &optional label))
(declare-function org-src-get-lang-mode "org-src" (lang))
(declare-function org-table-align "org-table" ())
(declare-function org-table-convert-region "org-table" (beg0 end0 &optional separator))
(declare-function org-table-end "org-table" (&optional table-type))
(declare-function org-table-import "org-table" (file arg))
(declare-function org-table-to-lisp "org-table" (&optional txt))
(declare-function org-unescape-code-in-string "org-src" (s))
(declare-function orgtbl-to-generic "org-table" (table params))
(declare-function orgtbl-to-orgtbl "org-table" (table params))
(declare-function tramp-compat-make-temp-file "tramp-compat" (filename &optional dir-flag))
(defgroup org-babel nil
"Code block evaluation and management in `org-mode' documents."
:tag "Babel"
:group 'org)
(defcustom org-confirm-babel-evaluate t
"Confirm before evaluation.
\\<org-mode-map>\
Require confirmation before interactively evaluating code
blocks in Org buffers. The default value of this variable is t,
meaning confirmation is required for any code block evaluation.
This variable can be set to nil to inhibit any future
confirmation requests. This variable can also be set to a
function which takes two arguments the language of the code block
and the body of the code block. Such a function should then
return a non-nil value if the user should be prompted for
execution or nil if no prompt is required.
Warning: Disabling confirmation may result in accidental
evaluation of potentially harmful code. It may be advisable
remove code block execution from `\\[org-ctrl-c-ctrl-c]' \
as further protection
against accidental code block evaluation. The
`org-babel-no-eval-on-ctrl-c-ctrl-c' variable can be used to
remove code block execution from the `\\[org-ctrl-c-ctrl-c]' keybinding."
:group 'org-babel
:version "24.1"
:type '(choice boolean function))
;; don't allow this variable to be changed through file settings
(put 'org-confirm-babel-evaluate 'safe-local-variable (lambda (x) (eq x t)))
(defcustom org-babel-no-eval-on-ctrl-c-ctrl-c nil
"\\<org-mode-map>\
Remove code block evaluation from the `\\[org-ctrl-c-ctrl-c]' key binding."
:group 'org-babel
:version "24.1"
:type 'boolean)
(defcustom org-babel-results-keyword "RESULTS"
"Keyword used to name results generated by code blocks.
It should be \"RESULTS\". However any capitalization may be
used."
:group 'org-babel
:version "24.4"
:package-version '(Org . "8.0")
:type 'string
:safe (lambda (v)
(and (stringp v)
(org-string-equal-ignore-case "RESULTS" v))))
(defcustom org-babel-noweb-wrap-start "<<"
"String used to begin a noweb reference in a code block.
See also `org-babel-noweb-wrap-end'."
:group 'org-babel
:type 'string)
(defcustom org-babel-noweb-wrap-end ">>"
"String used to end a noweb reference in a code block.
See also `org-babel-noweb-wrap-start'."
:group 'org-babel
:type 'string)
(defcustom org-babel-inline-result-wrap "=%s="
"Format string used to wrap inline results.
This string must include a \"%s\" which will be replaced by the results."
:group 'org-babel
:type 'string)
(put 'org-babel-inline-result-wrap
'safe-local-variable
(lambda (value)
(and (stringp value)
(string-match-p "%s" value))))
(defcustom org-babel-hash-show-time nil
"Non-nil means show the time the code block was evaluated in the result hash."
:group 'org-babel
:type 'boolean
:package-version '(Org . "9.0")
:safe #'booleanp)
(defcustom org-babel-uppercase-example-markers nil
"When non-nil, begin/end example markers will be inserted in upper case."
:group 'org-babel
:type 'boolean
:version "26.1"
:package-version '(Org . "9.1")
:safe #'booleanp)
(defun org-babel-noweb-wrap (&optional regexp)
"Return regexp matching a Noweb reference.
Match any reference, or only those matching REGEXP, if non-nil.
When matching, reference is stored in match group 1."
(concat (regexp-quote org-babel-noweb-wrap-start)
(or regexp "\\([^ \t\n]\\(?:.*?[^ \t\n]\\)?\\)")
(regexp-quote org-babel-noweb-wrap-end)))
(defvar org-babel-src-name-regexp
"^[ \t]*#\\+name:[ \t]*"
"Regular expression used to match a source name line.")
(defvar org-babel-multi-line-header-regexp
"^[ \t]*#\\+headers?:[ \t]*\\([^\n]*\\)$"
"Regular expression used to match multi-line header arguments.")
(defvar org-babel-src-block-regexp
(concat
;; (1) indentation (2) lang
"^\\([ \t]*\\)#\\+begin_src[ \t]+\\([^ \f\t\n\r\v]+\\)[ \t]*"
;; (3) switches
"\\([^\":\n]*\"[^\"\n*]*\"[^\":\n]*\\|[^\":\n]*\\)"
;; (4) header arguments
"\\([^\n]*\\)\n"
;; (5) body
"\\(\\(?:.\\|\n\\)*?\n\\)??[ \t]*#\\+end_src")
"Regexp used to identify code blocks.")
(defun org-babel--get-vars (params)
"Return the babel variable assignments in PARAMS.
PARAMS is a quasi-alist of header args, which may contain
multiple entries for the key `:var'. This function returns a
list of the cdr of all the `:var' entries."
(mapcar #'cdr
(cl-remove-if-not (lambda (x) (eq (car x) :var)) params)))
(defvar org-babel-exp-reference-buffer nil
"Buffer containing original contents of the exported buffer.
This is used by Babel to resolve references in source blocks.
Its value is dynamically bound during export.")
(defun org-babel-check-confirm-evaluate (info)
"Check whether INFO allows code block evaluation.
Returns nil if evaluation is disallowed, t if it is
unconditionally allowed, and the symbol `query' if the user
should be asked whether to allow evaluation."
(let* ((headers (nth 2 info))
(eval (or (cdr (assq :eval headers))
(when (assq :noeval headers) "no")))
(eval-no (member eval '("no" "never")))
(export org-babel-exp-reference-buffer)
(eval-no-export (and export (member eval '("no-export" "never-export"))))
(noeval (or eval-no eval-no-export))
(query (or (equal eval "query")
(and export (equal eval "query-export"))
(if (functionp org-confirm-babel-evaluate)
(funcall org-confirm-babel-evaluate
;; Language, code block body.
(nth 0 info)
(org-babel--expand-body info))
org-confirm-babel-evaluate))))
(cond
(noeval nil)
(query 'query)
(t t))))
(defun org-babel-check-evaluate (info)
"Check if code block INFO should be evaluated.
Do not query the user, but do display an informative message if
evaluation is blocked. Returns non-nil if evaluation is not blocked."
(let ((confirmed (org-babel-check-confirm-evaluate info)))
(unless confirmed
(message "Evaluation of this %s code block%sis disabled."
(nth 0 info)
(let ((name (nth 4 info)))
(if name (format " (%s) " name) " "))))
confirmed))
;; Dynamically scoped for asynchronous export.
(defvar org-babel-confirm-evaluate-answer-no)
(defun org-babel-confirm-evaluate (info)
"Confirm evaluation of the code block INFO.
This query can also be suppressed by setting the value of
`org-confirm-babel-evaluate' to nil, in which case all future
interactive code block evaluations will proceed without any
confirmation from the user.
Note disabling confirmation may result in accidental evaluation
of potentially harmful code.
The variable `org-babel-confirm-evaluate-answer-no' is used by
the async export process, which requires a non-interactive
environment, to override this check."
(let* ((evalp (org-babel-check-confirm-evaluate info))
(lang (nth 0 info))
(name (nth 4 info))
(name-string (if name (format " (%s) " name) " ")))
(pcase evalp
(`nil nil)
(`t t)
(`query (or
(and (not (bound-and-true-p
org-babel-confirm-evaluate-answer-no))
(yes-or-no-p
(format "Evaluate this %s code block%son your system? "
lang name-string)))
(progn
(message "Evaluation of this %s code block%sis aborted."
lang name-string)
nil)))
(x (error "Unexpected value `%s' from `org-babel-check-confirm-evaluate'" x)))))
;;;###autoload
(defun org-babel-execute-safely-maybe ()
"Maybe `org-babel-execute-maybe'.
This function does nothing unless `org-babel-no-eval-on-ctrl-c-ctrl-c'
is non-nil."
(unless org-babel-no-eval-on-ctrl-c-ctrl-c
(org-babel-execute-maybe)))
;;;###autoload
(defun org-babel-execute-maybe ()
"Execute src block or babel call at point."
(interactive)
(or (org-babel-execute-src-block-maybe)
(org-babel-lob-execute-maybe)))
(defmacro org-babel-when-in-src-block (&rest body)
"Execute BODY if point is in a source block and return t.
Otherwise do nothing and return nil."
`(if (org-element-type-p (org-element-context) '(inline-src-block src-block))
(progn
,@body
t)
nil))
(defun org-babel-execute-src-block-maybe ()
"Conditionally execute a source block.
Detect if this is context for a Babel src-block and if so
then run `org-babel-execute-src-block'."
(interactive)
(org-babel-when-in-src-block
(org-babel-eval-wipe-error-buffer)
(org-babel-execute-src-block current-prefix-arg)))
;;;###autoload
(defun org-babel-view-src-block-info ()
"Display information on the current source block.
This includes header arguments, language and name, and is largely
a window into the `org-babel-get-src-block-info' function."
(interactive)
(let ((info (org-babel-get-src-block-info 'no-eval))
(full (lambda (it) (> (length it) 0)))
(printf (lambda (fmt &rest args) (princ (apply #'format fmt args)))))
(when info
(with-help-window (help-buffer)
(let ((name (nth 4 info))
(lang (nth 0 info))
(switches (nth 3 info))
(header-args (nth 2 info)))
(when name (funcall printf "Name: %s\n" name))
(when lang (funcall printf "Lang: %s\n" lang))
(funcall printf "Properties:\n")
(funcall printf "\t:header-args \t%s\n" (org-entry-get (point) "header-args" t))
(funcall printf "\t:header-args:%s \t%s\n" lang (org-entry-get (point) (concat "header-args:" lang) t))
(when (funcall full switches) (funcall printf "Switches: %s\n" switches))
(funcall printf "Header Arguments:\n")
(dolist (pair (sort header-args
(lambda (a b) (string< (symbol-name (car a))
(symbol-name (car b))))))
(when (funcall full (format "%s" (cdr pair)))
(funcall printf "\t%S%s\t%s\n"
(car pair)
(if (> (length (format "%S" (car pair))) 7) "" "\t")
(cdr pair)))))))))
;;;###autoload
(defun org-babel-expand-src-block-maybe ()
"Conditionally expand a source block.
Detect if this is context for an org-babel src-block and if so
then run `org-babel-expand-src-block'."
(interactive)
(org-babel-when-in-src-block
(org-babel-expand-src-block current-prefix-arg)))
;;;###autoload
(defun org-babel-load-in-session-maybe ()
"Conditionally load a source block in a session.
Detect if this is context for an org-babel src-block and if so
then run `org-babel-load-in-session'."
(interactive)
(org-babel-when-in-src-block
(org-babel-load-in-session current-prefix-arg)))
(add-hook 'org-metaup-hook 'org-babel-load-in-session-maybe)
;;;###autoload
(defun org-babel-pop-to-session-maybe ()
"Conditionally pop to a session.
Detect if this is context for an org-babel src-block and if so
then run `org-babel-switch-to-session'."
(interactive)
(org-babel-when-in-src-block
(org-babel-switch-to-session current-prefix-arg)))
(add-hook 'org-metadown-hook 'org-babel-pop-to-session-maybe)
(defconst org-babel-common-header-args-w-values
'((cache . ((no yes)))
(cmdline . :any)
(colnames . ((nil no yes)))
(comments . ((no link yes org both noweb)))
(dir . :any)
(eval . ((yes no no-export strip-export never-export eval never
query)))
(exports . ((code results both none)))
(epilogue . :any)
(file . :any)
(file-desc . :any)
(file-ext . :any)
(file-mode . ((#o755 #o555 #o444 :any)))
(hlines . ((no yes)))
(mkdirp . ((yes no)))
(no-expand)
(noeval)
(noweb . ((yes no tangle strip-tangle no-export strip-export)))
(noweb-ref . :any)
(noweb-sep . :any)
(noweb-prefix . ((no yes)))
(output-dir . :any)
(padline . ((yes no)))
(post . :any)
(prologue . :any)
(results . ((file list vector table scalar verbatim)
(raw html latex org code pp drawer link graphics)
(replace silent none discard append prepend)
(output value)))
(rownames . ((no yes)))
(sep . :any)
(session . :any)
(shebang . :any)
(tangle . ((tangle yes no :any)))
(tangle-mode . ((#o755 #o555 #o444 :any)))
(var . :any)
(wrap . :any))
"Alist defining common header args and their allowed values.
Keys of the alist are header arg symbols.
Values of the alist are either a symbol `:any' or a list of allowed
values as symbols:
(header-name . :any)
(header-name . ((value1 value2 value3 ...))
(header-name . ((value1 value2 value3 ... :any))
When Org considers header-arg property inheritance, the innermost
value from the list is considered.
Symbol `:any' in the value list implies that any value is allowed.
Yet the explicitly listed values from the list will be offered as
completion candidates.
FIXME: This is currently just supported for `results' and `exports'.
Values in the alist can also be a list of lists. The inner lists
define exclusive groups of values that can be set at the same time for
a given header argument.
(results . ((file list ...)
(raw html ...))
The above example allows multi-component header arguments like
#+begin_src bash :results file raw
<:results will combine the two values \"file raw\".>
#+begin_src bash :results file list
<:results will only use the last value \"list\".>
#+property: header-args :results file html
...
#+begin_src bash :results list
<:results will inherit with partial override \"list html\".>
See info node `(org)Results of evaluation' for more details.")
(defconst org-babel-header-arg-names
(mapcar #'car org-babel-common-header-args-w-values)
"Common header arguments used by org-babel.
Note that individual languages may define their own language
specific header arguments as well.")
(defconst org-babel-safe-header-args
'(:cache :colnames :comments :exports :epilogue :hlines :noeval
:noweb :noweb-ref :noweb-sep :noweb-prefix :padline
:prologue :rownames :sep :session :tangle :wrap
(:eval . ("never" "query"))
(:results . (lambda (str) (not (string-match "file" str)))))
"A list of safe header arguments for babel source blocks.
The list can have entries of the following forms:
- :ARG -> :ARG is always a safe header arg
- (:ARG . (VAL1 VAL2 ...)) -> :ARG is safe as a header arg if it is
`equal' to one of the VALs.
- (:ARG . FN) -> :ARG is safe as a header arg if the function FN
returns non-nil. FN is passed one
argument, the value of the header arg
(as a string).")
(defmacro org-babel-header-args-safe-fn (safe-list)
"Return a function that determines whether a list of header args are safe.
Intended usage is:
\(put \\='org-babel-default-header-args \\='safe-local-variable
(org-babel-header-args-safe-p org-babel-safe-header-args)
This allows org-babel languages to extend the list of safe values for
their `org-babel-default-header-args:foo' variable.
For the format of SAFE-LIST, see `org-babel-safe-header-args'."
`(lambda (value)
(and (listp value)
(cl-every
(lambda (pair)
(and (consp pair)
(org-babel-one-header-arg-safe-p pair ,safe-list)))
value))))
(defvar org-babel-default-header-args
'((:session . "none") (:results . "replace") (:exports . "code")
(:cache . "no") (:noweb . "no") (:hlines . "no") (:tangle . "no"))
"Default arguments to use when evaluating a source block.
This is a list in which each element is an alist. Each key
corresponds to a header argument, and each value to that header's
value. The value can either be a string or a closure that
evaluates to a string.
A closure is evaluated when the source block is being
evaluated (e.g. during execution or export), with point at the
source block. It is not possible to use an arbitrary function
symbol (e.g. `some-func'), since org uses lexical binding. To
achieve the same functionality, call the function within a
closure (e.g. (lambda () (some-func))).
To understand how closures can be used as default header
arguments, imagine you'd like to set the file name output of a
latex source block to a sha1 of its contents. We could achieve
this with:
(defun org-src-sha ()
(let ((elem (org-element-at-point)))
(concat (sha1 (org-element-property :value elem)) \".svg\")))
(setq org-babel-default-header-args:latex
`((:results . \"file link replace\")
(:file . (lambda () (org-src-sha)))))
Because the closure is evaluated with point at the source block,
the call to `org-element-at-point' above will always retrieve
information about the current source block.
Some header arguments can be provided multiple times for a source
block. An example of such a header argument is :var. This
functionality is also supported for default header arguments by
providing the header argument multiple times in the alist. For
example:
((:var . \"foo=\\\"bar\\\"\")
(:var . \"bar=\\\"foo\\\"\"))")
(put 'org-babel-default-header-args 'safe-local-variable
(org-babel-header-args-safe-fn org-babel-safe-header-args))
(defvar org-babel-default-inline-header-args
'((:session . "none") (:results . "replace")
(:exports . "results") (:hlines . "yes"))
"Default arguments to use when evaluating an inline source block.")
(put 'org-babel-default-inline-header-args 'safe-local-variable
(org-babel-header-args-safe-fn org-babel-safe-header-args))
(defconst org-babel-name-regexp
(format "^[ \t]*#\\+%s:[ \t]*"
;; FIXME: TBLNAME is for backward compatibility.
(regexp-opt '("NAME" "TBLNAME")))
"Regexp matching a NAME keyword.")
(defconst org-babel-result-regexp
(rx (seq bol
(zero-or-more (any "\t "))
"#+results"
(opt "["
;; Time stamp part.
(opt "("
(= 4 digit) (= 2 "-" (= 2 digit))
" "
(= 2 digit) (= 2 ":" (= 2 digit))
") ")
;; SHA1 hash.
(group (one-or-more hex-digit))
"]")
":"
(zero-or-more (any "\t "))))
"Regular expression used to match result lines.
If the results are associated with a hash key then the hash will
be saved in match group 1.")
(defconst org-babel-result-w-name-regexp
(concat org-babel-result-regexp "\\(?9:[^ \t\n\r\v\f]+\\)")
"Regexp matching a RESULTS keyword with a name.
Name is saved in match group 9.")
(defvar org-babel-min-lines-for-block-output 10
"The minimum number of lines for block output.
If number of lines of output is equal to or exceeds this
value, the output is placed in a #+begin_example...#+end_example
block. Otherwise the output is marked as literal by inserting
colons at the starts of the lines. This variable only takes
effect if the :results output option is in effect.")
(defvar org-babel-noweb-error-all-langs nil
"Raise errors when noweb references don't resolve.
Also see `org-babel-noweb-error-langs' to control noweb errors on
a language by language bases.")
(defvar org-babel-noweb-error-langs nil
"Languages for which Babel will raise literate programming errors.
List of languages for which errors should be raised when the
source code block satisfying a noweb reference in this language
can not be resolved. Also see `org-babel-noweb-error-all-langs'
to raise errors for all languages.")
(defvar org-babel-hash-show 4
"Number of initial characters to show of a hidden results hash.")
(defvar org-babel-after-execute-hook nil
"Hook for functions to be called after `org-babel-execute-src-block'.")
(defun org-babel-named-src-block-regexp-for-name (&optional name)
"Generate a regexp used to match a source block named NAME.
If NAME is nil, match any name. Matched name is then put in
match group 9. Other match groups are defined in
`org-babel-src-block-regexp'."
(concat org-babel-src-name-regexp
(concat (if name (regexp-quote name) "\\(?9:.*?\\)") "[ \t]*" )
"\\(?:\n[ \t]*#\\+\\S-+:.*\\)*?"
"\n"
(substring org-babel-src-block-regexp 1)))
(defun org-babel-named-data-regexp-for-name (name)
"Generate a regexp used to match data named NAME."
(concat org-babel-name-regexp (regexp-quote name) "[ \t]*$"))
(defun org-babel--normalize-body (datum)
"Normalize body for element or object DATUM.
DATUM is a source block element or an inline source block object.
Remove final newline character and spurious indentation."
(let* ((value (org-element-property :value datum))
(body (if (string-suffix-p "\n" value)
(substring value 0 -1)
value)))
(cond ((org-element-type-p datum 'inline-src-block)
;; Newline characters and indentation in an inline
;; src-block are not meaningful, since they could come from
;; some paragraph filling. Treat them as a white space.
(replace-regexp-in-string "\n[ \t]*" " " body))
((org-src-preserve-indentation-p datum) body)
(t (org-remove-indentation body)))))
;;; functions
(defvar org-babel-current-src-block-location nil
"Marker pointing to the source block currently being executed.
This may also point to a call line or an inline code block. If
multiple blocks are being executed (e.g., in chained execution
through use of the :var header argument) this marker points to
the outer-most code block.")
(defun org-babel-eval-headers (headers)
"Compute header list set with HEADERS.
Evaluate all header arguments set to functions prior to returning
the list of header arguments."
(let ((lst nil))
(dolist (elem headers)
(if (and (cdr elem) (functionp (cdr elem)))
(push `(,(car elem) . ,(funcall (cdr elem))) lst)
(push elem lst)))
(reverse lst)))
(defun org-babel-get-src-block-info (&optional no-eval datum)
"Extract information from a source block or inline source block.
When optional argument NO-EVAL is non-nil, Babel does not resolve
remote variable references; a process which could likely result
in the execution of other code blocks, and do not evaluate Lisp
values in parameters.
By default, consider the block at point. However, when optional
argument DATUM is provided, extract information from that parsed
object instead.
Return nil if point is not on a source block (blank lines after a
source block are considered a part of that source block).
Otherwise, return a list with the following pattern:
(language body arguments switches name start coderef)"
(let* ((datum (or datum (org-element-context)))
(type (org-element-type datum))
(inline (eq type 'inline-src-block)))
(when (memq type '(inline-src-block src-block))
(let* ((lang (org-element-property :language datum))
(lang-headers (intern
(concat "org-babel-default-header-args:" lang)))
(name (org-element-property :name datum))
(info
(list
lang
(org-babel--normalize-body datum)
(apply #'org-babel-merge-params
(if inline org-babel-default-inline-header-args
org-babel-default-header-args)
(and (boundp lang-headers) (eval lang-headers t))
(append
;; If DATUM is provided, make sure we get node
;; properties applicable to its location within
;; the document.
(org-with-point-at (org-element-begin datum)
(org-babel-params-from-properties lang no-eval))
(mapcar (lambda (h)
(org-babel-parse-header-arguments h no-eval))
(cons (org-element-property :parameters datum)
(org-element-property :header datum)))))
(or (org-element-property :switches datum) "")
name
(org-element-property (if inline :begin :post-affiliated)
datum)
(and (not inline) (org-src-coderef-format datum)))))
(unless no-eval
(setf (nth 2 info) (org-babel-process-params (nth 2 info))))
(setf (nth 2 info) (org-babel-generate-file-param name (nth 2 info)))
info))))
(defun org-babel--expand-body (info)
"Expand noweb references in src block and remove any coderefs.
The src block is defined by its INFO, as returned by
`org-babel-get-src-block-info'."
(let ((coderef (nth 6 info))
(expand
(if (org-babel-noweb-p (nth 2 info) :eval)
(org-babel-expand-noweb-references info)
(nth 1 info))))
(if (not coderef) expand
(replace-regexp-in-string
(org-src-coderef-regexp coderef) "" expand nil nil 1))))
(defun org-babel--file-desc (params result)
"Retrieve description for file link result of evaluation.
PARAMS is header argument values. RESULT is the file link as returned
by the code block.
When `:file-desc' header argument is provided use its value or
duplicate RESULT in the description.
When `:file-desc' is missing, return nil."
(pcase (assq :file-desc params)
(`nil nil)
(`(:file-desc) result)
(`(:file-desc . ,(and (pred stringp) val)) val)))
(defvar *this*)
;; Dynamically bound in `org-babel-execute-src-block'
;; and `org-babel-read'
(defun org-babel-session-buffer (&optional info)
"Return buffer name for session associated with current code block.
Return nil when no such live buffer with process exists.
When INFO is non-nil, it should be a list returned by
`org-babel-get-src-block-info'.
This function uses org-babel-session-buffer:<lang> function to
retrieve backend-specific session buffer name."
(declare-function org-babel-comint-buffer-livep "ob-comint" (buffer))
(when-let* ((info (or info (org-babel-get-src-block-info 'no-eval)))
(lang (nth 0 info))
(session (cdr (assq :session (nth 2 info))))
(cmd (intern (concat "org-babel-session-buffer:" lang)))
(buffer-name
(if (fboundp cmd)
(funcall cmd session info)
;; Use session name as buffer name by default.
session)))
(require 'ob-comint)
(when (org-babel-comint-buffer-livep buffer-name)
buffer-name)))
;;;###autoload
(defun org-babel-execute-src-block (&optional arg info params executor-type)
"Execute the current source code block and return the result.
Insert the results of execution into the buffer. Source code
execution and the collection and formatting of results can be
controlled through a variety of header arguments.
With prefix argument ARG, force re-execution even if an existing
result cached in the buffer would otherwise have been returned.
Optionally supply a value for INFO in the form returned by
`org-babel-get-src-block-info'.
Optionally supply a value for PARAMS which will be merged with
the header arguments specified at the front of the source code
block.
EXECUTOR-TYPE is the type of the org element responsible for the
execution of the source block. If not provided then informed
guess will be made."
(interactive)
(let* ((org-babel-current-src-block-location
(or org-babel-current-src-block-location
(nth 5 info)
(org-babel-where-is-src-block-head)))
(info (if info (copy-tree info) (org-babel-get-src-block-info)))
(executor-type
(or executor-type
;; If `executor-type' is unset, then we will make an
;; informed guess.
(pcase (and
;; When executing virtual src block, no location
;; is known.
org-babel-current-src-block-location
(char-after org-babel-current-src-block-location))
(?s 'inline-src-block)
(?c 'inline-babel-call)
(?# (pcase (char-after (+ 2 org-babel-current-src-block-location))
(?b 'src-block)
(?c 'call-block)
(_ 'unknown)))
(_ 'unknown)))))
;; Merge PARAMS with INFO before considering source block
;; evaluation since both could disagree.
(cl-callf org-babel-merge-params (nth 2 info) params)
(when (org-babel-check-evaluate info)
(cl-callf org-babel-process-params (nth 2 info))
(let* ((params (nth 2 info))
(cache (let ((c (cdr (assq :cache params))))
(and (not arg) c (string= "yes" c))))
(new-hash (and cache (org-babel-sha1-hash info :eval)))
(old-hash (and cache (org-babel-current-result-hash)))
(current-cache (and new-hash (equal new-hash old-hash))))
(cond
(current-cache
(save-excursion ;Return cached result.
(goto-char (org-babel-where-is-src-block-result nil info))
(forward-line)
(skip-chars-forward " \t")
(let ((result (org-babel-read-result)))
(unless noninteractive
(message (format "Cached: %s"
(replace-regexp-in-string "%" "%%" (format "%S" result)))))
result)))
((org-babel-confirm-evaluate info)
(let* ((lang (nth 0 info))
(result-params (cdr (assq :result-params params)))
(body (org-babel--expand-body info))
(dir (cdr (assq :dir params)))
(mkdirp (cdr (assq :mkdirp params)))
(default-directory
(cond
((not dir) default-directory)
((when-let* ((session (org-babel-session-buffer info)))
(buffer-local-value 'default-directory (get-buffer session))))
((member mkdirp '("no" "nil" nil))
(file-name-as-directory (expand-file-name dir)))
(t
(let ((d (file-name-as-directory (expand-file-name dir))))
(make-directory d 'parents)
d))))
(cmd (intern (concat "org-babel-execute:" lang)))
result exec-start-time)
(unless (fboundp cmd)
(error "No org-babel-execute function for %s!" lang))
(unless noninteractive
(message "Executing %s %s %s..."
(capitalize lang)
(pcase executor-type
('src-block "code block")
('inline-src-block "inline code block")
('babel-call "call")
('inline-babel-call "inline call")
(e (symbol-name e)))
(let ((name (nth 4 info)))
(if name
(format "(%s)" name)
(format "at position %S" (nth 5 info))))))
(setq exec-start-time (current-time)
result
(let ((r
;; Code block may move point in the buffer.
;; Make sure that the point remains on the
;; code block.
(save-excursion (funcall cmd body params))))
(if (and (eq (cdr (assq :result-type params)) 'value)
(or (member "vector" result-params)
(member "table" result-params))
(not (listp r)))
(list (list r))
r)))
(let ((file (and (member "file" result-params)
(cdr (assq :file params)))))
;; If non-empty result and :file then write to :file.
(when file
;; If `:results' are special types like `link' or
;; `graphics', don't write result to `:file'. Only
;; insert a link to `:file'.
(when (and result
(not (or (member "link" result-params)
(member "graphics" result-params))))
(with-temp-file file
(insert (org-babel-format-result
result
(cdr (assq :sep params)))))
;; Set file permissions if header argument
;; `:file-mode' is provided.
(when (assq :file-mode params)
(set-file-modes file (cdr (assq :file-mode params)))))
(setq result file))
;; Possibly perform post process provided its
;; appropriate. Dynamically bind "*this*" to the
;; actual results of the block.
(let ((post (cdr (assq :post params))))
(when post
(let ((*this* (if (not file) result
(org-babel-result-to-file
file
(org-babel--file-desc params result)
'attachment))))
(setq result (org-babel-ref-resolve post))
(when file
(setq result-params (remove "file" result-params))))))
(unless (member "none" result-params)
(org-babel-insert-result
result result-params info
;; append/prepend cannot handle hash as we accumulate
;; multiple outputs together.
(when (member "replace" result-params) new-hash)
lang
(time-subtract (current-time) exec-start-time))))
(run-hooks 'org-babel-after-execute-hook)
result)))))))
(defun org-babel-expand-body:generic (body params &optional var-lines)
"Expand BODY with PARAMS.
Expand a block of code with org-babel according to its header
arguments. This generic implementation of body expansion is
called for languages which have not defined their own specific
org-babel-expand-body:lang function.
VAR-LINES is a list of lines that define variable environment. These
lines will be added after `:prologue' parameter and before BODY."
(let ((pro (cdr (assq :prologue params)))
(epi (cdr (assq :epilogue params))))
(mapconcat #'identity
(append (when pro (list pro))
var-lines
(list body)
(when epi (list epi)))
"\n")))
;;;###autoload
(defun org-babel-expand-src-block (&optional _arg info params)
"Expand the current source code block or block specified by INFO.
INFO is the output of `org-babel-get-src-block-info'.
PARAMS defines inherited header arguments.
Expand according to the source code block's header
arguments and pop open the results in a preview buffer."
(interactive)
(let* ((info (or info (org-babel-get-src-block-info)))
(lang (nth 0 info))
(params (setf (nth 2 info)
(sort (org-babel-merge-params (nth 2 info) params)
(lambda (el1 el2) (string< (symbol-name (car el1))
(symbol-name (car el2)))))))
(body (setf (nth 1 info)
(if (org-babel-noweb-p params :eval)
(org-babel-expand-noweb-references info) (nth 1 info))))
(expand-cmd (intern (concat "org-babel-expand-body:" lang)))
(assignments-cmd (intern (concat "org-babel-variable-assignments:"
lang)))
(expanded
(if (fboundp expand-cmd) (funcall expand-cmd body params)
(org-babel-expand-body:generic
body params (and (fboundp assignments-cmd)
(funcall assignments-cmd params))))))
(if (called-interactively-p 'any)
(org-edit-src-code
expanded (concat "*Org-Babel Preview " (buffer-name) "[ " lang " ]*"))