310 lines
12 KiB
EmacsLisp
310 lines
12 KiB
EmacsLisp
;;; ob-shell.el --- Babel Functions for Shell Evaluation -*- lexical-binding: t; -*-
|
||
|
||
;; Copyright (C) 2009-2022 Free Software Foundation, Inc.
|
||
|
||
;; Author: Eric Schulte
|
||
;; Keywords: literate programming, reproducible research
|
||
;; Homepage: 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:
|
||
|
||
;; Org-Babel support for evaluating shell source code.
|
||
|
||
;;; Code:
|
||
(require 'ob)
|
||
(require 'org-macs)
|
||
(require 'shell)
|
||
(require 'cl-lib)
|
||
|
||
(declare-function org-babel-comint-in-buffer "ob-comint" (buffer &rest body)
|
||
t)
|
||
(declare-function org-babel-comint-wait-for-output "ob-comint" (buffer))
|
||
(declare-function org-babel-comint-buffer-livep "ob-comint" (buffer))
|
||
(declare-function org-babel-comint-with-output "ob-comint" (meta &rest body)
|
||
t)
|
||
(declare-function orgtbl-to-generic "org-table" (table params))
|
||
|
||
(defvar org-babel-default-header-args:shell '())
|
||
(defvar org-babel-shell-names)
|
||
|
||
(defun org-babel-shell-initialize ()
|
||
"Define execution functions associated to shell names.
|
||
This function has to be called whenever `org-babel-shell-names'
|
||
is modified outside the Customize interface."
|
||
(interactive)
|
||
(dolist (name org-babel-shell-names)
|
||
(eval `(defun ,(intern (concat "org-babel-execute:" name))
|
||
(body params)
|
||
,(format "Execute a block of %s commands with Babel." name)
|
||
(let ((shell-file-name ,name))
|
||
(org-babel-execute:shell body params))))
|
||
(eval `(defalias ',(intern (concat "org-babel-variable-assignments:" name))
|
||
'org-babel-variable-assignments:shell
|
||
,(format "Return list of %s statements assigning to the block's \
|
||
variables."
|
||
name)))
|
||
(eval `(defvar ,(intern (concat "org-babel-default-header-args:" name)) '()))))
|
||
|
||
(defcustom org-babel-shell-names
|
||
'("sh" "bash" "zsh" "fish" "csh" "ash" "dash" "ksh" "mksh" "posh")
|
||
"List of names of shell supported by babel shell code blocks.
|
||
Call `org-babel-shell-initialize' when modifying this variable
|
||
outside the Customize interface."
|
||
:group 'org-babel
|
||
:type '(repeat (string :tag "Shell name: "))
|
||
:set (lambda (symbol value)
|
||
(set-default-toplevel-value symbol value)
|
||
(org-babel-shell-initialize)))
|
||
|
||
(defcustom org-babel-shell-results-defaults-to-output t
|
||
"Let shell execution defaults to \":results output\".
|
||
|
||
When set to t, use \":results output\" when no :results setting
|
||
is set. This is especially useful for inline source blocks.
|
||
|
||
When set to nil, stick to the convention of using :results value
|
||
as the default setting when no :results is set, the \"value\" of
|
||
a shell execution being its exit code."
|
||
:group 'org-babel
|
||
:type 'boolean
|
||
:package-version '(Org . "9.4"))
|
||
|
||
(defun org-babel-execute:shell (body params)
|
||
"Execute a block of Shell commands with Babel.
|
||
This function is called by `org-babel-execute-src-block'."
|
||
(let* ((session (org-babel-sh-initiate-session
|
||
(cdr (assq :session params))))
|
||
(stdin (let ((stdin (cdr (assq :stdin params))))
|
||
(when stdin (org-babel-sh-var-to-string
|
||
(org-babel-ref-resolve stdin)))))
|
||
(results-params (cdr (assq :result-params params)))
|
||
(value-is-exit-status
|
||
(or (and
|
||
(equal '("replace") results-params)
|
||
(not org-babel-shell-results-defaults-to-output))
|
||
(member "value" results-params)))
|
||
(cmdline (cdr (assq :cmdline params)))
|
||
(full-body (concat
|
||
(org-babel-expand-body:generic
|
||
body params (org-babel-variable-assignments:shell params))
|
||
(when value-is-exit-status "\necho $?"))))
|
||
(org-babel-reassemble-table
|
||
(org-babel-sh-evaluate session full-body params stdin cmdline)
|
||
(org-babel-pick-name
|
||
(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
|
||
(org-babel-pick-name
|
||
(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
|
||
|
||
(defun org-babel-prep-session:shell (session params)
|
||
"Prepare SESSION according to the header arguments specified in PARAMS."
|
||
(let* ((session (org-babel-sh-initiate-session session))
|
||
(var-lines (org-babel-variable-assignments:shell params)))
|
||
(org-babel-comint-in-buffer session
|
||
(mapc (lambda (var)
|
||
(insert var) (comint-send-input nil t)
|
||
(org-babel-comint-wait-for-output session))
|
||
var-lines))
|
||
session))
|
||
|
||
(defun org-babel-load-session:shell (session body params)
|
||
"Load BODY into SESSION."
|
||
(save-window-excursion
|
||
(let ((buffer (org-babel-prep-session:shell session params)))
|
||
(with-current-buffer buffer
|
||
(goto-char (process-mark (get-buffer-process (current-buffer))))
|
||
(insert (org-babel-chomp body)))
|
||
buffer)))
|
||
|
||
|
||
;;; Helper functions
|
||
(defun org-babel--variable-assignments:sh-generic
|
||
(varname values &optional sep hline)
|
||
"Return a list of statements declaring the values as a generic variable."
|
||
(format "%s=%s" varname (org-babel-sh-var-to-sh values sep hline)))
|
||
|
||
(defun org-babel--variable-assignments:bash_array
|
||
(varname values &optional sep hline)
|
||
"Return a list of statements declaring the values as a bash array."
|
||
(format "unset %s\ndeclare -a %s=( %s )"
|
||
varname varname
|
||
(mapconcat
|
||
(lambda (value) (org-babel-sh-var-to-sh value sep hline))
|
||
values
|
||
" ")))
|
||
|
||
(defun org-babel--variable-assignments:bash_assoc
|
||
(varname values &optional sep hline)
|
||
"Return a list of statements declaring the values as bash associative array."
|
||
(format "unset %s\ndeclare -A %s\n%s"
|
||
varname varname
|
||
(mapconcat
|
||
(lambda (items)
|
||
(format "%s[%s]=%s"
|
||
varname
|
||
(org-babel-sh-var-to-sh (car items) sep hline)
|
||
(org-babel-sh-var-to-sh (cdr items) sep hline)))
|
||
values
|
||
"\n")))
|
||
|
||
(defun org-babel--variable-assignments:bash (varname values &optional sep hline)
|
||
"Represent the parameters as useful Bash shell variables."
|
||
(pcase values
|
||
(`((,_ ,_ . ,_) . ,_) ;two-dimensional array
|
||
(org-babel--variable-assignments:bash_assoc varname values sep hline))
|
||
(`(,_ . ,_) ;simple list
|
||
(org-babel--variable-assignments:bash_array varname values sep hline))
|
||
(_ ;scalar value
|
||
(org-babel--variable-assignments:sh-generic varname values sep hline))))
|
||
|
||
(defun org-babel-variable-assignments:shell (params)
|
||
"Return list of shell statements assigning the block's variables."
|
||
(let ((sep (cdr (assq :separator params)))
|
||
(hline (when (string= "yes" (cdr (assq :hlines params)))
|
||
(or (cdr (assq :hline-string params))
|
||
"hline"))))
|
||
(mapcar
|
||
(lambda (pair)
|
||
(if (string-suffix-p "bash" shell-file-name)
|
||
(org-babel--variable-assignments:bash
|
||
(car pair) (cdr pair) sep hline)
|
||
(org-babel--variable-assignments:sh-generic
|
||
(car pair) (cdr pair) sep hline)))
|
||
(org-babel--get-vars params))))
|
||
|
||
(defun org-babel-sh-var-to-sh (var &optional sep hline)
|
||
"Convert an elisp value to a shell variable.
|
||
Convert an elisp var into a string of shell commands specifying a
|
||
var of the same value."
|
||
(concat "'" (replace-regexp-in-string
|
||
"'" "'\"'\"'"
|
||
(org-babel-sh-var-to-string var sep hline))
|
||
"'"))
|
||
|
||
(defun org-babel-sh-var-to-string (var &optional sep hline)
|
||
"Convert an elisp value to a string."
|
||
(let ((echo-var (lambda (v) (if (stringp v) v (format "%S" v)))))
|
||
(cond
|
||
((and (listp var) (or (listp (car var)) (eq (car var) 'hline)))
|
||
(orgtbl-to-generic var (list :sep (or sep "\t") :fmt echo-var
|
||
:hline hline)))
|
||
((listp var)
|
||
(mapconcat echo-var var "\n"))
|
||
(t (funcall echo-var var)))))
|
||
|
||
(defun org-babel-sh-initiate-session (&optional session _params)
|
||
"Initiate a session named SESSION according to PARAMS."
|
||
(when (and session (not (string= session "none")))
|
||
(save-window-excursion
|
||
(or (org-babel-comint-buffer-livep session)
|
||
(progn
|
||
(shell session)
|
||
;; Needed for Emacs 23 since the marker is initially
|
||
;; undefined and the filter functions try to use it without
|
||
;; checking.
|
||
(set-marker comint-last-output-start (point))
|
||
(get-buffer (current-buffer)))))))
|
||
|
||
(defvar org-babel-sh-eoe-indicator "echo 'org_babel_sh_eoe'"
|
||
"String to indicate that evaluation has completed.")
|
||
(defvar org-babel-sh-eoe-output "org_babel_sh_eoe"
|
||
"String to indicate that evaluation has completed.")
|
||
|
||
(defun org-babel-sh-evaluate (session body &optional params stdin cmdline)
|
||
"Pass BODY to the Shell process in BUFFER.
|
||
If RESULT-TYPE equals `output' then return a list of the outputs
|
||
of the statements in BODY, if RESULT-TYPE equals `value' then
|
||
return the value of the last statement in BODY."
|
||
(let* ((shebang (cdr (assq :shebang params)))
|
||
(results-params (cdr (assq :result-params params)))
|
||
(value-is-exit-status
|
||
(or (and
|
||
(equal '("replace") results-params)
|
||
(not org-babel-shell-results-defaults-to-output))
|
||
(member "value" results-params)))
|
||
(results
|
||
(cond
|
||
((or stdin cmdline) ; external shell script w/STDIN
|
||
(let ((script-file (org-babel-temp-file "sh-script-"))
|
||
(stdin-file (org-babel-temp-file "sh-stdin-"))
|
||
(padline (not (string= "no" (cdr (assq :padline params))))))
|
||
(with-temp-file script-file
|
||
(when shebang (insert shebang "\n"))
|
||
(when padline (insert "\n"))
|
||
(insert body))
|
||
(set-file-modes script-file #o755)
|
||
(with-temp-file stdin-file (insert (or stdin "")))
|
||
(with-temp-buffer
|
||
(call-process-shell-command
|
||
(concat (if shebang script-file
|
||
(format "%s %s" shell-file-name script-file))
|
||
(and cmdline (concat " " cmdline)))
|
||
stdin-file
|
||
(current-buffer))
|
||
(buffer-string))))
|
||
(session ; session evaluation
|
||
(mapconcat
|
||
#'org-babel-sh-strip-weird-long-prompt
|
||
(mapcar
|
||
#'org-trim
|
||
(butlast
|
||
(org-babel-comint-with-output
|
||
(session org-babel-sh-eoe-output t body)
|
||
(dolist (line (append (split-string (org-trim body) "\n")
|
||
(list org-babel-sh-eoe-indicator)))
|
||
(insert line)
|
||
(comint-send-input nil t)
|
||
(while (save-excursion
|
||
(goto-char comint-last-input-end)
|
||
(not (re-search-forward
|
||
comint-prompt-regexp nil t)))
|
||
(accept-process-output
|
||
(get-buffer-process (current-buffer))))))
|
||
2))
|
||
"\n"))
|
||
;; External shell script, with or without a predefined
|
||
;; shebang.
|
||
((org-string-nw-p shebang)
|
||
(let ((script-file (org-babel-temp-file "sh-script-"))
|
||
(padline (not (equal "no" (cdr (assq :padline params))))))
|
||
(with-temp-file script-file
|
||
(insert shebang "\n")
|
||
(when padline (insert "\n"))
|
||
(insert body))
|
||
(set-file-modes script-file #o755)
|
||
(org-babel-eval script-file "")))
|
||
(t (org-babel-eval shell-file-name (org-trim body))))))
|
||
(when value-is-exit-status
|
||
(setq results (car (reverse (split-string results "\n" t)))))
|
||
(when results
|
||
(let ((result-params (cdr (assq :result-params params))))
|
||
(org-babel-result-cond result-params
|
||
results
|
||
(let ((tmp-file (org-babel-temp-file "sh-")))
|
||
(with-temp-file tmp-file (insert results))
|
||
(org-babel-import-elisp-from-file tmp-file)))))))
|
||
|
||
(defun org-babel-sh-strip-weird-long-prompt (string)
|
||
"Remove prompt cruft from a string of shell output."
|
||
(while (string-match "^% +[\r\n$]+ *" string)
|
||
(setq string (substring string (match-end 0))))
|
||
string)
|
||
|
||
(provide 'ob-shell)
|
||
|
||
;;; ob-shell.el ends here
|