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58f1dbccf8
Also remove blank lines before the ";;; org*el ends here" declarations. Having a "Version" header forced us to update every file when releasing a new version of Org; it also forced us to update every file when merging Org with Emacs trunk, thus cluttering the diffs between the previously merged version and the new one with useless information. Glenn Morris suggested this in emacs-devel: http://lists.gnu.org/archive/html/emacs-devel/2011-08/msg00322.html
117 lines
4.1 KiB
EmacsLisp
117 lines
4.1 KiB
EmacsLisp
;;; ob-awk.el --- org-babel functions for awk evaluation
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;; Copyright (C) 2011 Free Software Foundation, Inc.
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;; Author: 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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Babel's awk can use special header argument:
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;;
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;; - :in-file takes a path to a file of data to be processed by awk
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;;
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;; - :stdin takes an Org-mode data or code block reference, the value
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;; of which will be passed to the awk process through STDIN
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;;; Code:
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(require 'ob)
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(require 'ob-eval)
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(eval-when-compile (require 'cl))
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(declare-function org-babel-ref-resolve "ob-ref" (ref))
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(declare-function orgtbl-to-generic "org-table" (table params))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("awk" . "awk"))
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(defvar org-babel-awk-command "awk"
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"Name of the awk executable command.")
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(defun org-babel-expand-body:awk (body params &optional processed-params)
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"Expand BODY according to PARAMS, return the expanded body."
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(dolist (pair (mapcar #'cdr (org-babel-get-header params :var)))
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(setf body (replace-regexp-in-string
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(regexp-quote (concat "$" (car pair))) (cdr pair) body)))
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body)
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(defun org-babel-execute:awk (body params)
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"Execute a block of Awk code with org-babel. This function is
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called by `org-babel-execute-src-block'"
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(message "executing Awk source code block")
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(let* ((result-params (cdr (assoc :result-params params)))
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(cmd-line (cdr (assoc :cmd-line params)))
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(in-file (cdr (assoc :in-file params)))
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(full-body (org-babel-expand-body:awk body params))
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(code-file ((lambda (file) (with-temp-file file (insert full-body)) file)
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(org-babel-temp-file "awk-")))
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(stdin ((lambda (stdin)
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(when stdin
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(let ((tmp (org-babel-temp-file "awk-stdin-"))
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(res (org-babel-ref-resolve stdin)))
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(with-temp-file tmp
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(insert (org-babel-awk-var-to-awk res)))
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tmp)))
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(cdr (assoc :stdin params))))
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(cmd (mapconcat #'identity (remove nil (list org-babel-awk-command
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"-f" 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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((lambda (results)
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(when results
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(if (or (member "scalar" result-params)
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(member "verbatim" result-params)
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(member "output" result-params))
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results
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(let ((tmp (org-babel-temp-file "awk-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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(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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(org-babel-pick-name
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(cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
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(org-babel-pick-name
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(cdr (assoc :rowname-names params)) (cdr (assoc :rownames params))))))
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(defun org-babel-awk-var-to-awk (var &optional sep)
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"Return a printed value of VAR suitable for parsing with awk."
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(flet ((echo-var (v) (if (stringp v) v (format "%S" v))))
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(cond
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((and (listp var) (listp (car var)))
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(orgtbl-to-generic var (list :sep (or sep "\t") :fmt #'echo-var)))
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((listp var)
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(mapconcat #'echo-var var "\n"))
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(t (echo-var var)))))
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(defun org-babel-awk-table-or-string (results)
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"If the results look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(org-babel-script-escape results))
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(provide 'ob-awk)
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;;; ob-awk.el ends here
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