;;; 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 . ;;; 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) (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) (format "my $%s=%s;" (car pair) (org-babel-perl-var-to-perl (cdr pair)))) (mapcar #'cdr (org-babel-get-header params :var)))) ;; helper functions (defun org-babel-perl-var-to-perl (var) "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 (listp var) (concat "[" (mapconcat #'org-babel-perl-var-to-perl var ", ") "]") (format "%S" var))) (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 " sub main { %s } @r = main; open(o, \">%s\"); print o join(\"\\n\", @r), \"\\n\"") (defvar org-babel-perl-pp-wrapper-method nil) (defun org-babel-perl-evaluate (session body &optional result-type) "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")) (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-eval-read-file tmp-file))))) (provide 'ob-perl) ;;; ob-perl.el ends here