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117 lines
5.0 KiB
117 lines
5.0 KiB
;;; haskell-modules.el --- -*- lexical-binding: t -*-
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;; Copyright (c) 2014 Chris Done. All rights reserved.
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;; This file 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, or (at your option)
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;; any later version.
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;; This file 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 this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'haskell-sort-imports)
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(require 'haskell-align-imports)
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(require 'haskell-session)
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(require 'haskell-navigate-imports)
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(require 'haskell-complete-module)
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(require 'haskell-sandbox)
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(require 'haskell-customize)
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(defun haskell-add-import (&optional module)
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"Add an import to the import list. Sorts and aligns imports,
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unless `haskell-stylish-on-save' is set, in which case we defer
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to stylish-haskell."
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(interactive)
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(save-excursion
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(goto-char (point-max))
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(haskell-navigate-imports)
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(insert (haskell-import-for-module
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(or module
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(haskell-complete-module-read
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"Module: "
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(haskell-session-all-modules (haskell-modules-session))))))
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(unless haskell-stylish-on-save (haskell-sort-imports)
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(haskell-align-imports))))
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(defun haskell-import-for-module (module)
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"Get import statements for the given module."
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(let ((mapping (assoc module haskell-import-mapping)))
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(if mapping
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(cdr mapping)
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(concat (read-from-minibuffer "Import line: "
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(format "import %s" module))
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"\n"))))
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;;;###autoload
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(defun haskell-session-installed-modules (_session &optional _dontcreate)
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"Get the modules installed in the current package set."
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;; TODO: Again, this makes HEAVY use of unix utilities. It'll work
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;; fine in Linux, probably okay on OS X, and probably not at all on
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;; Windows. Again, if someone wants to test on Windows and come up
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;; with alternatives that's OK.
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;;
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;; Ideally all these package queries can be provided by a Haskell
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;; program based on the Cabal API. Possibly as a nice service. Such
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;; a service could cache and do nice things like that. For now, this
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;; simple shell script takes us far.
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;;
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;; Probably also we can take the code from inferior-haskell-mode.
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;;
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;; Ugliness aside, if it saves us time to type it's a winner.
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;;
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;; FIXME/TODO: add support for (eq 'cabal-repl (haskell-process-type))
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(let ((session (haskell-session-maybe)))
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(when session
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(let ((modules (shell-command-to-string
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(format "%s 2> /dev/null | %s | %s"
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(cond
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((haskell-sandbox-exists-p session)
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(concat "ghc-pkg dump -f "
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(shell-quote-argument (haskell-sandbox-pkgdb session))))
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(t "ghc-pkg dump"))
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"egrep '^(exposed-modules: | )[A-Z]'"
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"cut -c18-"))))
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(split-string modules)))))
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;;;###autoload
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(defun haskell-session-all-modules (session &optional dontcreate)
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"Get all modules -- installed or in the current project.
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If DONTCREATE is non-nil don't create a new session."
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(append (haskell-session-installed-modules session dontcreate)
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(haskell-session-project-modules session dontcreate)))
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;;;###autoload
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(defun haskell-session-project-modules (session &optional dontcreate)
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"Get the modules of the current project.
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If DONTCREATE is non-nil don't create a new session."
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(if (or (not dontcreate) (haskell-session-maybe))
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(let* ((modules
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(shell-command-to-string
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(format "%s && %s"
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(format "cd %s" (haskell-session-cabal-dir session))
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;; TODO: Use a different, better source. Possibly hasktags or some such.
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;; TODO: At least make it cross-platform. Linux
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;; (and possibly OS X) have egrep, Windows
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;; doesn't -- or does it via Cygwin or MinGW?
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;; This also doesn't handle module\nName. But those gits can just cut it out!
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"egrep '^module[\t\r ]+[^(\t\r ]+' . -r -I --include='*.*hs' --include='*.hsc' -s -o -h | sed 's/^module[\t\r ]*//' | sort | uniq"))))
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(split-string modules))))
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(defun haskell-modules-session ()
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"Get the `haskell-session', throw an error if it's not
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available."
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(or (haskell-session-maybe)
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(haskell-session-assign
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(or (haskell-session-from-buffer)
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(haskell-session-choose)
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(error "No session associated with this buffer. Try M-x haskell-session-change or report this as a bug.")))))
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(provide 'haskell-modules)
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