1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
| | ;;; ob-perl.el --- org-babel functions for perl evaluation
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Authors: Dan Davison
;; 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 perl source code.
;;; Code:
(require 'ob)
(eval-when-compile (require 'cl))
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("perl" . "pl"))
(defvar org-babel-default-header-args:perl '())
(defvar org-babel-perl-command "perl"
"Name of command to use for executing perl code.")
(defun org-babel-execute:perl (body params)
"Execute a block of Perl code with Babel.
This function is called by `org-babel-execute-src-block'."
(let* ((session (cdr (assoc :session params)))
(result-params (cdr (assoc :result-params params)))
(result-type (cdr (assoc :result-type params)))
(full-body (org-babel-expand-body:generic
body params (org-babel-variable-assignments:perl params)))
(session (org-babel-perl-initiate-session session)))
(org-babel-reassemble-table
(org-babel-perl-evaluate session full-body result-type result-params)
(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:perl (session params)
"Prepare SESSION according to the header arguments in PARAMS."
(error "Sessions are not supported for Perl"))
(defun org-babel-variable-assignments:perl (params)
"Return list of perl statements assigning the block's variables."
(mapcar
(lambda (pair)
(org-babel-perl--var-to-perl (cdr pair) (car pair)))
(mapcar #'cdr (org-babel-get-header params :var))))
;; helper functions
(defvar org-babel-perl-var-wrap "q(%s)"
"Wrapper for variables inserted into Perl code.")
(defvar org-babel-perl--lvl)
(defun org-babel-perl--var-to-perl (var &optional varn)
"Convert an elisp value to a perl variable.
The elisp value, VAR, is converted to a string of perl source code
specifying a var of the same value."
(if varn
(let ((org-babel-perl--lvl 0) (lvar (listp var)) prefix)
(concat "my $" (symbol-name varn) "=" (when lvar "\n")
(org-babel-perl--var-to-perl var)
";\n"))
(let ((prefix (make-string (* 2 org-babel-perl--lvl) ?\ )))
(concat prefix
(if (listp var)
(let ((org-babel-perl--lvl (1+ org-babel-perl--lvl)))
(concat "[\n"
(mapconcat #'org-babel-perl--var-to-perl var "")
prefix "]"))
(format "q(%s)" var))
(unless (zerop org-babel-perl--lvl) ",\n")))))
(defvar org-babel-perl-buffers '(:default . nil))
(defun org-babel-perl-initiate-session (&optional session params)
"Return nil because sessions are not supported by perl."
nil)
(defvar org-babel-perl-wrapper-method "{
my $babel_sub = sub {
%s
};
open my $BOH, qq(>%s) or die qq(Perl: Could not open output file.$/);
select $BOH;
my $rv = &$babel_sub();
my $rt = ref $rv;
if (qq(ARRAY) eq $rt) {
local $\\=$/;
foreach my $rv ( @$rv ) {
my $rt = ref $rv;
if (qq(ARRAY) eq $rt) {
print join q(|), @$rv;
} else {
print $rv;
}
}
} else {
print $rv;
}
}")
(defvar org-babel-perl-preface nil)
(defvar org-babel-perl-pp-wrapper-method
nil)
(defun org-babel-perl-evaluate (session ibody &optional result-type result-params)
"Pass BODY to the Perl process in SESSION.
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, as elisp."
(when session (error "Sessions are not supported for Perl"))
(let ((body (concat org-babel-perl-preface ibody)))
(case result-type
(output (org-babel-eval org-babel-perl-command body))
(value (let ((tmp-file (org-babel-temp-file "perl-")))
(org-babel-eval
org-babel-perl-command
(format org-babel-perl-wrapper-method body
(org-babel-process-file-name tmp-file 'noquote)))
(org-babel-result-cond result-params
(with-temp-buffer
(insert-file-contents tmp-file)
(buffer-string))
(org-babel-import-elisp-from-file tmp-file '(16))))))))
(provide 'ob-perl)
;;; ob-perl.el ends here
|