forked from mirrors/org-mode
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
218 lines
8.6 KiB
EmacsLisp
218 lines
8.6 KiB
EmacsLisp
;;; ob-haskell.el --- org-babel functions for haskell evaluation
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;; Copyright (C) 2009-2011 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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;; Org-Babel support for evaluating haskell source code. This one will
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;; be sort of tricky because haskell programs must be compiled before
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;; they can be run, but haskell code can also be run through an
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;; interactive interpreter.
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;;
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;; For now lets only allow evaluation using the haskell interpreter.
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;;; Requirements:
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;; - haskell-mode :: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
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;;
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;; - inf-haskell :: http://www.iro.umontreal.ca/~monnier/elisp/#haskell-mode
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;;
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;; - (optionally) lhs2tex :: http://people.cs.uu.nl/andres/lhs2tex/
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;;; Code:
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(require 'ob)
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(require 'ob-comint)
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(require 'comint)
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(eval-when-compile (require 'cl))
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(declare-function org-remove-indentation "org" (code &optional n))
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(declare-function haskell-mode "ext:haskell-mode" ())
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(declare-function run-haskell "ext:inf-haskell" (&optional arg))
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(declare-function inferior-haskell-load-file
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"ext:inf-haskell" (&optional reload))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("haskell" . "hs"))
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(defvar org-babel-default-header-args:haskell '())
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(defvar org-babel-haskell-lhs2tex-command "lhs2tex")
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(defvar org-babel-haskell-eoe "\"org-babel-haskell-eoe\"")
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(defun org-babel-execute:haskell (body params)
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"Execute a block of Haskell code."
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(let* ((session (cdr (assoc :session params)))
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(vars (mapcar #'cdr (org-babel-get-header params :var)))
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(result-type (cdr (assoc :result-type params)))
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(full-body (org-babel-expand-body:generic
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body params
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(org-babel-variable-assignments:haskell params)))
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(session (org-babel-haskell-initiate-session session params))
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(raw (org-babel-comint-with-output
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(session org-babel-haskell-eoe t full-body)
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(insert (org-babel-trim full-body))
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(comint-send-input nil t)
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(insert org-babel-haskell-eoe)
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(comint-send-input nil t)))
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(results (mapcar
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#'org-babel-haskell-read-string
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(cdr (member org-babel-haskell-eoe
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(reverse (mapcar #'org-babel-trim raw)))))))
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(org-babel-reassemble-table
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(cond
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((equal result-type 'output)
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(mapconcat #'identity (reverse (cdr results)) "\n"))
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((equal result-type 'value)
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(org-babel-haskell-table-or-string (car results))))
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(org-babel-pick-name (cdr (assoc :colname-names params))
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(cdr (assoc :colname-names params)))
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(org-babel-pick-name (cdr (assoc :rowname-names params))
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(cdr (assoc :rowname-names params))))))
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(defun org-babel-haskell-read-string (string)
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"Strip \\\"s from around a haskell string."
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(if (string-match "^\"\\([^\000]+\\)\"$" string)
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(match-string 1 string)
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string))
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(defun org-babel-haskell-initiate-session (&optional session params)
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"Initiate a haskell session.
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If there is not a current inferior-process-buffer in SESSION
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then create one. Return the initialized session."
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(require 'inf-haskell)
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(or (get-buffer "*haskell*")
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(save-window-excursion (run-haskell) (sleep-for 0.25) (current-buffer))))
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(defun org-babel-load-session:haskell (session body params)
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"Load BODY into SESSION."
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(save-window-excursion
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(let* ((buffer (org-babel-prep-session:haskell session params))
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(load-file (concat (org-babel-temp-file "haskell-load-") ".hs")))
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(with-temp-buffer
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(insert body) (write-file load-file)
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(haskell-mode) (inferior-haskell-load-file))
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buffer)))
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(defun org-babel-prep-session:haskell (session params)
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"Prepare SESSION according to the header arguments in PARAMS."
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(save-window-excursion
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(let ((buffer (org-babel-haskell-initiate-session session)))
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(org-babel-comint-in-buffer buffer
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(mapc (lambda (line)
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(insert line)
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(comint-send-input nil t))
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(org-babel-variable-assignments:haskell params)))
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(current-buffer))))
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(defun org-babel-variable-assignments:haskell (params)
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"Return list of haskell statements assigning the block's variables"
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(mapcar (lambda (pair)
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(format "let %s = %s"
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(car pair)
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(org-babel-haskell-var-to-haskell (cdr pair))))
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(mapcar #'cdr (org-babel-get-header params :var))))
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(defun org-babel-haskell-table-or-string (results)
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"Convert RESULTS to an Emacs-lisp table or string.
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If 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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(defun org-babel-haskell-var-to-haskell (var)
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"Convert an elisp value VAR into a haskell variable.
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The elisp VAR is converted to a string of haskell source code
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specifying a variable of the same value."
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(if (listp var)
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(concat "[" (mapconcat #'org-babel-haskell-var-to-haskell var ", ") "]")
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(format "%S" var)))
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(defvar org-src-preserve-indentation)
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(defun org-babel-haskell-export-to-lhs (&optional arg)
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"Export to a .lhs file with all haskell code blocks escaped.
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When called with a prefix argument the resulting
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.lhs file will be exported to a .tex file. This function will
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create two new files, base-name.lhs and base-name.tex where
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base-name is the name of the current org-mode file.
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Note that all standard Babel literate programming
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constructs (header arguments, no-web syntax etc...) are ignored."
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(interactive "P")
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(let* ((contents (buffer-string))
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(haskell-regexp
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(concat "^\\([ \t]*\\)#\\+begin_src[ \t]haskell*\\(.*\\)?[\r\n]"
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"\\([^\000]*?\\)[\r\n][ \t]*#\\+end_src.*"))
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(base-name (file-name-sans-extension (buffer-file-name)))
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(tmp-file (org-babel-temp-file "haskell-"))
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(tmp-org-file (concat tmp-file ".org"))
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(tmp-tex-file (concat tmp-file ".tex"))
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(lhs-file (concat base-name ".lhs"))
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(tex-file (concat base-name ".tex"))
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(command (concat org-babel-haskell-lhs2tex-command
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" " (org-babel-process-file-name lhs-file)
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" > " (org-babel-process-file-name tex-file)))
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(preserve-indentp org-src-preserve-indentation)
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indentation)
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;; escape haskell source-code blocks
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(with-temp-file tmp-org-file
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(insert contents)
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(goto-char (point-min))
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(while (re-search-forward haskell-regexp nil t)
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(save-match-data (setq indentation (length (match-string 1))))
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(replace-match (save-match-data
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(concat
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"#+begin_latex\n\\begin{code}\n"
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(if (or preserve-indentp
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(string-match "-i" (match-string 2)))
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(match-string 3)
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(org-remove-indentation (match-string 3)))
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"\n\\end{code}\n#+end_latex\n"))
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t t)
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(indent-code-rigidly (match-beginning 0) (match-end 0) indentation)))
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(save-excursion
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;; export to latex w/org and save as .lhs
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(find-file tmp-org-file) (funcall 'org-export-as-latex nil)
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(kill-buffer nil)
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(delete-file tmp-org-file)
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(find-file tmp-tex-file)
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(goto-char (point-min)) (forward-line 2)
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(insert "%include polycode.fmt\n")
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;; ensure all \begin/end{code} statements start at the first column
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(while (re-search-forward "^[ \t]+\\\\begin{code}[^\000]+\\\\end{code}" nil t)
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(replace-match (save-match-data (org-remove-indentation (match-string 0)))
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t t))
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(setq contents (buffer-string))
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(save-buffer) (kill-buffer nil))
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(delete-file tmp-tex-file)
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;; save org exported latex to a .lhs file
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(with-temp-file lhs-file (insert contents))
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(if (not arg)
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(find-file lhs-file)
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;; process .lhs file with lhs2tex
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(message "running %s" command) (shell-command command) (find-file tex-file))))
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(provide 'ob-haskell)
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;;; ob-haskell.el ends here
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