bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
157 lines
5.2 KiB
EmacsLisp
157 lines
5.2 KiB
EmacsLisp
;;; ob-perl.el --- Babel Functions for Perl -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2017 Free Software Foundation, Inc.
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;; Authors: Dan Davison
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;; Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating perl source code.
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;;; Code:
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(require 'ob)
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("perl" . "pl"))
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(defvar org-babel-default-header-args:perl '())
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(defvar org-babel-perl-command "perl"
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"Name of command to use for executing perl code.")
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(defun org-babel-execute:perl (body params)
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"Execute a block of Perl code with Babel.
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This function is called by `org-babel-execute-src-block'."
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(let* ((session (cdr (assq :session params)))
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(result-params (cdr (assq :result-params params)))
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(result-type (cdr (assq :result-type params)))
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(full-body (org-babel-expand-body:generic
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body params (org-babel-variable-assignments:perl params)))
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(session (org-babel-perl-initiate-session session)))
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(org-babel-reassemble-table
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(org-babel-perl-evaluate session full-body result-type result-params)
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(org-babel-pick-name
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(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
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(org-babel-pick-name
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(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
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(defun org-babel-prep-session:perl (_session _params)
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"Prepare SESSION according to the header arguments in PARAMS."
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(error "Sessions are not supported for Perl"))
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(defun org-babel-variable-assignments:perl (params)
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"Return list of perl statements assigning the block's variables."
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(mapcar
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(lambda (pair)
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(org-babel-perl--var-to-perl (cdr pair) (car pair)))
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(org-babel--get-vars params)))
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;; helper functions
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(defvar org-babel-perl-var-wrap "q(%s)"
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"Wrapper for variables inserted into Perl code.")
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(defvar org-babel-perl--lvl)
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(defun org-babel-perl--var-to-perl (var &optional varn)
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"Convert an elisp value to a perl variable.
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The elisp value, VAR, is converted to a string of perl source code
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specifying a var of the same value."
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(if varn
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(let ((org-babel-perl--lvl 0) (lvar (listp var)))
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(concat "my $" (symbol-name varn) "=" (when lvar "\n")
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(org-babel-perl--var-to-perl var)
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";\n"))
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(let ((prefix (make-string (* 2 org-babel-perl--lvl) ?\ )))
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(concat prefix
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(if (listp var)
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(let ((org-babel-perl--lvl (1+ org-babel-perl--lvl)))
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(concat "[\n"
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(mapconcat #'org-babel-perl--var-to-perl var "")
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prefix "]"))
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(format "q(%s)" var))
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(unless (zerop org-babel-perl--lvl) ",\n")))))
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(defvar org-babel-perl-buffers '(:default . nil))
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(defun org-babel-perl-initiate-session (&optional _session _params)
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"Return nil because sessions are not supported by perl."
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nil)
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(defvar org-babel-perl-wrapper-method "{
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my $babel_sub = sub {
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%s
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};
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open my $BOH, qq(>%s) or die qq(Perl: Could not open output file.$/);
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my $rv = &$babel_sub();
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my $rt = ref $rv;
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select $BOH;
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if (qq(ARRAY) eq $rt) {
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local $\\=$/;
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local $,=qq(\t);
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foreach my $rv ( @$rv ) {
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my $rt = ref $rv;
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if (qq(ARRAY) eq $rt) {
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print @$rv;
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} else {
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print $rv;
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}
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}
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} else {
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print $rv;
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}
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}")
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(defvar org-babel-perl-preface nil)
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(defvar org-babel-perl-pp-wrapper-method
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nil)
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(defun org-babel-perl-evaluate (session ibody &optional result-type result-params)
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"Pass BODY to the Perl process in SESSION.
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If RESULT-TYPE equals `output' then return a list of the outputs
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of the statements in BODY, if RESULT-TYPE equals `value' then
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return the value of the last statement in BODY, as elisp."
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(when session (error "Sessions are not supported for Perl"))
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(let* ((body (concat org-babel-perl-preface ibody))
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(tmp-file (org-babel-temp-file "perl-"))
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(tmp-babel-file (org-babel-process-file-name
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tmp-file 'noquote)))
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(let ((results
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(pcase result-type
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(`output
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(with-temp-file tmp-file
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(insert
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(org-babel-eval org-babel-perl-command body))
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(buffer-string)))
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(`value
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(org-babel-eval org-babel-perl-command
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(format org-babel-perl-wrapper-method
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body tmp-babel-file))))))
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(when results
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(org-babel-result-cond result-params
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(org-babel-eval-read-file tmp-file)
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(org-babel-import-elisp-from-file tmp-file '(16)))))))
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(provide 'ob-perl)
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;;; ob-perl.el ends here
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