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