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Diffstat (limited to 'lisp/ob-shell.el')
| -rw-r--r-- | lisp/ob-shell.el | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/lisp/ob-shell.el b/lisp/ob-shell.el new file mode 100644 index 0000000..3ee2f4d --- /dev/null +++ b/lisp/ob-shell.el @@ -0,0 +1,264 @@ +;;; ob-shell.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 <http://www.gnu.org/licenses/>. + +;;; 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:shell '()) + +(defcustom org-babel-shell-names + '("sh" "bash" "csh" "ash" "dash" "ksh" "mksh" "posh") + "List of names of shell supported by babel shell code blocks." + :group 'org-babel + :type 'string + :initialize + (lambda (symbol value) + (set-default symbol (second value)) + (mapc + (lambda (name) + (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))))) + (second value)))) + +(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 (assoc :session params)))) + (stdin (let ((stdin (cdr (assoc :stdin params)))) + (when stdin (org-babel-sh-var-to-string + (org-babel-ref-resolve stdin))))) + (cmdline (cdr (assoc :cmdline params))) + (full-body (org-babel-expand-body:generic + body params (org-babel-variable-assignments:shell params)))) + (org-babel-reassemble-table + (org-babel-sh-evaluate session full-body params stdin cmdline) + (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: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) + "Returns 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) + "Returns 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) + "Returns 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) + "Represents the parameters as useful Bash shell variables." + (if (listp values) + (if (and (listp (car values)) (= 1 (length (car values)))) + (org-babel-variable-assignments:bash_array varname values sep hline) + (org-babel-variable-assignments:bash_assoc varname values sep hline)) + (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 (assoc :separator params))) + (hline (when (string= "yes" (cdr (assoc :hlines params))) + (or (cdr (assoc :hline-string params)) + "hline")))) + (mapcar + (lambda (pair) + (if (string-match "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))) + (mapcar #'cdr (org-babel-get-header params :var))))) + +(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)) (equal (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 ((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-")) + (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 (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-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 shell-file-name (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-shell) + + + +;;; ob-shell.el ends here |