;;; ob-sh.el --- org-babel functions for shell evaluation ;; Copyright (C) 2009-2014 Free Software Foundation, Inc. ;; Author: Eric Schulte ;; Keywords: literate programming, reproducible research ;; Homepage: http://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 . ;;; Commentary: ;; Org-Babel support for evaluating shell source code. ;;; Code: (require 'ob) (require 'shell) (eval-when-compile (require 'cl)) (declare-function org-babel-comint-in-buffer "ob-comint" (buffer &rest body)) (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)) (declare-function orgtbl-to-generic "org-table" (table params)) (defvar org-babel-default-header-args:sh '()) (defvar org-babel-sh-command "sh" "Command used to invoke a shell. This will be passed to `shell-command-on-region'") (defcustom org-babel-sh-var-quote-fmt "$(cat <<'BABEL_TABLE'\n%s\nBABEL_TABLE\n)" "Format string used to escape variables when passed to shell scripts." :group 'org-babel :type 'string) (defun org-babel-execute:sh (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 (assoc :session params)))) (stdin (let ((stdin (cdr (assoc :stdin params)))) (when stdin (org-babel-sh-var-to-string (org-babel-ref-resolve stdin))))) (full-body (org-babel-expand-body:generic body params (org-babel-variable-assignments:sh params)))) (org-babel-reassemble-table (org-babel-sh-evaluate session full-body params stdin) (org-babel-pick-name (cdr (assoc :colname-names params)) (cdr (assoc :colnames params))) (org-babel-pick-name (cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))) (defun org-babel-prep-session:sh (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:sh 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:sh (session body params) "Load BODY into SESSION." (save-window-excursion (let ((buffer (org-babel-prep-session:sh 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 (params) "Return list of shell statements assigning the block's variables." (let ((sep (cdr (assoc :separator params)))) (mapcar (lambda (pair) (format "%s=%s" (car pair) (org-babel-sh-var-to-sh (cdr pair) sep))) (mapcar #'cdr (org-babel-get-header params :var))))) (defun org-babel-sh-var-to-sh (var &optional sep) "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." (format org-babel-sh-var-quote-fmt (org-babel-sh-var-to-string var sep))) (defun org-babel-sh-var-to-string (var &optional sep) "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)) (equal (car var) 'hline))) (orgtbl-to-generic var (list :sep (or sep "\t") :fmt echo-var))) ((listp var) (mapconcat echo-var var "\n")) (t (funcall echo-var var))))) (defun org-babel-sh-table-or-results (results) "Convert RESULTS to an appropriate elisp value. If the results look like a table, then convert them into an Emacs-lisp table, otherwise return the results as a string." (org-babel-script-escape results)) (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) (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) "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 ((results (cond (stdin ; external shell script w/STDIN (let ((script-file (org-babel-temp-file "sh-script-")) (stdin-file (org-babel-temp-file "sh-stdin-")) (shebang (cdr (assoc :shebang params))) (padline (not (string= "no" (cdr (assoc :padline params)))))) (with-temp-file script-file (when shebang (insert (concat shebang "\n"))) (when padline (insert "\n")) (insert body)) (set-file-modes script-file #o755) (with-temp-file stdin-file (insert stdin)) (with-temp-buffer (call-process-shell-command (if shebang script-file (format "%s %s" org-babel-sh-command script-file)) stdin-file (current-buffer)) (buffer-string)))) (session ; session evaluation (mapconcat #'org-babel-sh-strip-weird-long-prompt (mapcar #'org-babel-trim (butlast (org-babel-comint-with-output (session org-babel-sh-eoe-output t body) (mapc (lambda (line) (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))))) (append (split-string (org-babel-trim body) "\n") (list org-babel-sh-eoe-indicator)))) 2)) "\n")) ('otherwise ; external shell script (if (and (cdr (assoc :shebang params)) (> (length (cdr (assoc :shebang params))) 0)) (let ((script-file (org-babel-temp-file "sh-script-")) (shebang (cdr (assoc :shebang params))) (padline (not (equal "no" (cdr (assoc :padline params)))))) (with-temp-file script-file (when shebang (insert (concat shebang "\n"))) (when padline (insert "\n")) (insert body)) (set-file-modes script-file #o755) (org-babel-eval script-file "")) (org-babel-eval org-babel-sh-command (org-babel-trim body))))))) (when results (let ((result-params (cdr (assoc :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-sh) ;;; ob-sh.el ends here