86 lines
3.3 KiB
EmacsLisp
86 lines
3.3 KiB
EmacsLisp
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;;; flycheck-pkg-config.el --- configure flycheck using pkg-config -*- lexical-binding: t; -*-
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;; Copyright (C) 2016
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;; Author: Wilfred Hughes <me@wilfred.me.uk>
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;; Keywords: flycheck
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;; Package-Version: 20160610.1335
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;; Version: 0.1
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;; Package-Requires: ((dash "2.8.0") (s "1.9.0") (cl-lib "0.5"))
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;; This program 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 2 of the License, or
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;; (at your option) any later version.
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;; This program 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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;;; Commentary:
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;; Flycheck defines a `flycheck-clang-include-path' variable that it
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;; searches for headers when checking C/C++ code.
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;;
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;; This package provides a convenient way of adding libraries to that
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;; list, using pkg-config and completion.
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;;; Code:
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(require 's)
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(require 'dash)
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(require 'flycheck)
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(defvar flycheck-pkg-config--libs nil)
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(defun flycheck-pkg-config--ignore-case-less-p (s1 s2)
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(string< (downcase s1) (downcase s2)))
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(defun flycheck-pkg-config--set-libs ()
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"Set `flycheck-pkg-config--libs' by calling pkg-config."
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(let* ((all-libs-with-names
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(shell-command-to-string "pkg-config --list-all"))
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(lines (s-split "\n" (s-trim all-libs-with-names)))
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(libs (--map (-first-item (s-split " " it)) lines)))
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(setq flycheck-pkg-config--libs (-sort #'flycheck-pkg-config--ignore-case-less-p libs))))
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(defun flycheck-pkg-config--include-paths (library-name)
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"Get a list of include paths for LIBRARY-NAME.
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Raises an error if pkg-config can't find any paths for this library."
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(let* (;; Find the include flags, e.g. "-I/usr/lib/foo"
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(pkgconfig-cmd (format "pkg-config --cflags %s" library-name))
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(cc-args (s-trim (shell-command-to-string pkgconfig-cmd))))
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(if (s-contains? "-I" cc-args)
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;; pkg-config has found a library with this name.
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(let (ret)
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(dolist (x (s-split " " cc-args) ret)
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(if (s-starts-with? "-I" x) (setq ret (cons (s-chop-prefix "-I" x) ret)))))
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(user-error cc-args))))
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;;;###autoload
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(defun flycheck-pkg-config ()
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"Configure flycheck to use additional includes
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when checking the current buffer."
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(interactive)
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;; Find out all the libraries installed on this system.
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(unless flycheck-pkg-config--libs
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(flycheck-pkg-config--set-libs))
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(let* ((lib-name (completing-read "Library name: " flycheck-pkg-config--libs))
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;; Find the include paths, e.g. "-I/usr/lib/foo"
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(include-paths (flycheck-pkg-config--include-paths lib-name)))
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;; Only set in this buffer.
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(make-local-variable 'flycheck-clang-include-path)
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;; Add include paths to `flycheck-clang-include-path' unless
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;; already present.
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(setq flycheck-clang-include-path
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(-union flycheck-clang-include-path include-paths))
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(message "flycheck-clang-include-path: %s"
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flycheck-clang-include-path)))
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(provide 'flycheck-pkg-config)
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;;; flycheck-pkg-config.el ends here
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