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|
;;; ob-sed.el --- Babel Functions for Sed Scripts -*- lexical-binding: t; -*-
;; Copyright (C) 2015-2018 Free Software Foundation, Inc.
;; Author: Bjarte Johansen
;; Keywords: literate programming, reproducible research
;; Version: 0.1.0
;; 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 <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Provides a way to evaluate sed scripts in Org mode.
;;; Usage:
;; Add to your Emacs config:
;; (org-babel-do-load-languages
;; 'org-babel-load-languages
;; '((sed . t)))
;; In addition to the normal header arguments, ob-sed also provides
;; :cmd-line and :in-file. :cmd-line allows one to pass other flags to
;; the sed command like the "--in-place" flag which makes sed edit the
;; file pass to it instead of outputting to standard out or to a
;; different file. :in-file is a header arguments that allows one to
;; tell Org Babel which file the sed script to act on.
;;; Code:
(require 'ob)
(defvar org-babel-sed-command "sed"
"Name of the sed executable command.")
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("sed" . "sed"))
(defconst org-babel-header-args:sed
'((:cmd-line . :any)
(:in-file . :any))
"Sed specific header arguments.")
(defvar org-babel-default-header-args:sed '()
"Default arguments for evaluating a sed source block.")
(defun org-babel-execute:sed (body params)
"Execute a block of sed code with Org Babel.
BODY is the source inside a sed source block and PARAMS is an
association list over the source block configurations. This
function is called by `org-babel-execute-src-block'."
(message "executing sed source code block")
(let* ((result-params (cdr (assq :result-params params)))
(cmd-line (cdr (assq :cmd-line params)))
(in-file (cdr (assq :in-file params)))
(code-file (let ((file (org-babel-temp-file "sed-")))
(with-temp-file file
(insert body)) file))
(stdin (let ((stdin (cdr (assq :stdin params))))
(when stdin
(let ((tmp (org-babel-temp-file "sed-stdin-"))
(res (org-babel-ref-resolve stdin)))
(with-temp-file tmp
(insert res))
tmp))))
(cmd (mapconcat #'identity
(remq nil
(list org-babel-sed-command
(format "--file=\"%s\"" code-file)
cmd-line
in-file))
" ")))
(org-babel-reassemble-table
(let ((results
(cond
(stdin (with-temp-buffer
(call-process-shell-command cmd stdin (current-buffer))
(buffer-string)))
(t (org-babel-eval cmd "")))))
(when results
(org-babel-result-cond result-params
results
(let ((tmp (org-babel-temp-file "sed-results-")))
(with-temp-file tmp (insert results))
(org-babel-import-elisp-from-file tmp)))))
(org-babel-pick-name
(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
(org-babel-pick-name
(cdr (assq :rowname-names params)) (cdr (assq :rownames params))))))
(provide 'ob-sed)
;;; ob-sed.el ends here
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