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1 | ;;; ob-sh.el --- org-babel functions for shell evaluation |
2 | ||
3 | ;; Copyright (C) 2009, 2010 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Eric Schulte | |
6 | ;; Keywords: literate programming, reproducible research | |
7 | ;; Homepage: http://orgmode.org | |
8 | ;; Version: 7.01 | |
9 | ||
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation, either version 3 of the License, or | |
15 | ;; (at your option) any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; Org-Babel support for evaluating shell source code. | |
28 | ||
29 | ;;; Code: | |
30 | (require 'ob) | |
31 | (require 'ob-comint) | |
32 | (require 'ob-eval) | |
33 | (require 'shell) | |
34 | (eval-when-compile (require 'cl)) | |
35 | ||
36 | (declare-function org-babel-ref-variables "ob-ref" (params)) | |
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37 | (declare-function orgtbl-to-generic "org-table" (table params)) |
38 | ||
39 | (defvar org-babel-default-header-args:sh '()) | |
40 | ||
41 | (defvar org-babel-sh-command "sh" | |
42 | "Command used to invoke a shell. | |
43 | This will be passed to `shell-command-on-region'") | |
44 | ||
45 | (defun org-babel-expand-body:sh (body params &optional processed-params) | |
46 | "Expand BODY according to PARAMS, return the expanded body." | |
47 | (let ((vars (nth 1 (or processed-params (org-babel-process-params params)))) | |
48 | (sep (cdr (assoc :separator params)))) | |
49 | (concat | |
50 | (mapconcat ;; define any variables | |
51 | (lambda (pair) | |
52 | (format "%s=%s" | |
53 | (car pair) | |
54 | (org-babel-sh-var-to-sh (cdr pair) sep))) | |
55 | vars "\n") "\n" body "\n\n"))) | |
56 | ||
57 | (defun org-babel-execute:sh (body params) | |
58 | "Execute a block of Shell commands with Babel. | |
59 | This function is called by `org-babel-execute-src-block'." | |
60 | (let* ((processed-params (org-babel-process-params params)) | |
61 | (session (org-babel-sh-initiate-session (nth 0 processed-params))) | |
62 | (result-params (nth 2 processed-params)) | |
63 | (full-body (org-babel-expand-body:sh | |
64 | body params processed-params))) | |
65 | (org-babel-reassemble-table | |
66 | (org-babel-sh-evaluate session full-body result-params) | |
67 | (org-babel-pick-name | |
68 | (nth 4 processed-params) (cdr (assoc :colnames params))) | |
69 | (org-babel-pick-name | |
70 | (nth 5 processed-params) (cdr (assoc :rownames params)))))) | |
71 | ||
72 | (defun org-babel-prep-session:sh (session params) | |
73 | "Prepare SESSION according to the header arguments specified in PARAMS." | |
74 | (let* ((session (org-babel-sh-initiate-session session)) | |
75 | (vars (org-babel-ref-variables params)) | |
76 | (sep (cdr (assoc :separator params))) | |
77 | (var-lines (mapcar ;; define any variables | |
78 | (lambda (pair) | |
79 | (format "%s=%s" | |
80 | (car pair) | |
81 | (org-babel-sh-var-to-sh (cdr pair) sep))) | |
82 | vars))) | |
83 | (org-babel-comint-in-buffer session | |
84 | (mapc (lambda (var) | |
85 | (insert var) (comint-send-input nil t) | |
86 | (org-babel-comint-wait-for-output session)) var-lines)) | |
87 | session)) | |
88 | ||
89 | (defun org-babel-load-session:sh (session body params) | |
90 | "Load BODY into SESSION." | |
91 | (save-window-excursion | |
92 | (let ((buffer (org-babel-prep-session:sh session params))) | |
93 | (with-current-buffer buffer | |
94 | (goto-char (process-mark (get-buffer-process (current-buffer)))) | |
95 | (insert (org-babel-chomp body))) | |
96 | buffer))) | |
97 | ||
98 | ;; helper functions | |
99 | ||
100 | (defun org-babel-sh-var-to-sh (var &optional sep) | |
101 | "Convert an elisp value to a shell variable. | |
102 | Convert an elisp var into a string of shell commands specifying a | |
103 | var of the same value." | |
104 | (if (listp var) | |
105 | (flet ((deep-string (el) | |
106 | (if (listp el) | |
107 | (mapcar #'deep-string el) | |
108 | (org-babel-sh-var-to-sh el sep)))) | |
109 | (format "$(cat <<BABEL_TABLE\n%s\nBABEL_TABLE\n)" | |
110 | (orgtbl-to-generic | |
111 | (deep-string var) (list :sep (or sep "\t"))))) | |
112 | (if (stringp var) | |
113 | (if (string-match "[\n\r]" var) | |
114 | (format "$(cat <<BABEL_STRING\n%s\nBABEL_STRING\n)" var) | |
115 | (format "%s" var)) | |
116 | (format "%S" var)))) | |
117 | ||
118 | (defun org-babel-sh-table-or-results (results) | |
119 | "Convert RESULTS to an appropriate elisp value. | |
120 | If the results look like a table, then convert them into an | |
121 | Emacs-lisp table, otherwise return the results as a string." | |
122 | (org-babel-read | |
123 | (if (string-match "^\\[.+\\]$" results) | |
124 | (org-babel-read | |
125 | (concat "'" | |
126 | (replace-regexp-in-string | |
127 | "\\[" "(" (replace-regexp-in-string | |
128 | "\\]" ")" (replace-regexp-in-string | |
129 | ", " " " (replace-regexp-in-string | |
130 | "'" "\"" results)))))) | |
131 | results))) | |
132 | ||
133 | (defun org-babel-sh-initiate-session (&optional session params) | |
134 | "Initiate a session named SESSION according to PARAMS." | |
135 | (when (and session (not (string= session "none"))) | |
136 | (save-window-excursion | |
137 | (or (org-babel-comint-buffer-livep session) | |
138 | (progn (shell session) (get-buffer (current-buffer))))))) | |
139 | ||
140 | (defvar org-babel-sh-eoe-indicator "echo 'org_babel_sh_eoe'" | |
141 | "String to indicate that evaluation has completed.") | |
142 | (defvar org-babel-sh-eoe-output "org_babel_sh_eoe" | |
143 | "String to indicate that evaluation has completed.") | |
144 | ||
145 | (defun org-babel-sh-evaluate (session body &optional result-params) | |
146 | "Pass BODY to the Shell process in BUFFER. | |
147 | If RESULT-TYPE equals 'output then return a list of the outputs | |
148 | of the statements in BODY, if RESULT-TYPE equals 'value then | |
149 | return the value of the last statement in BODY." | |
150 | ((lambda (results) | |
151 | (if (or (member "scalar" result-params) | |
152 | (member "output" result-params)) | |
153 | results | |
154 | (let ((tmp-file (make-temp-file "org-babel-sh"))) | |
155 | (with-temp-file tmp-file (insert results)) | |
156 | (org-babel-import-elisp-from-file tmp-file)))) | |
157 | (if (not session) | |
158 | (org-babel-eval org-babel-sh-command (org-babel-trim body)) | |
159 | (let ((tmp-file (make-temp-file "org-babel-sh"))) | |
160 | (mapconcat | |
161 | #'org-babel-sh-strip-weird-long-prompt | |
162 | (mapcar | |
163 | #'org-babel-trim | |
164 | (butlast | |
165 | (org-babel-comint-with-output | |
166 | (session org-babel-sh-eoe-output t body) | |
167 | (mapc | |
168 | (lambda (line) | |
169 | (insert line) (comint-send-input nil t) (sleep-for 0.25)) | |
170 | (append | |
171 | (split-string (org-babel-trim body) "\n") | |
172 | (list org-babel-sh-eoe-indicator)))) | |
173 | 2)) "\n"))))) | |
174 | ||
175 | (defun org-babel-sh-strip-weird-long-prompt (string) | |
176 | "Remove prompt cruft from a string of shell output." | |
177 | (while (string-match "^% +[\r\n$]+ *" string) | |
178 | (setq string (substring string (match-end 0)))) | |
179 | string) | |
180 | ||
181 | (provide 'ob-sh) | |
182 | ||
183 | ;; arch-tag: 416dd531-c230-4b0a-a5bf-8d948f990f2d | |
184 | ||
185 | ;;; ob-sh.el ends here |