72 lines
2.9 KiB
EmacsLisp
72 lines
2.9 KiB
EmacsLisp
;;; funcs.el --- C/C++ Layer functions File for Spacemacs
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;;
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;; Copyright (c) 2012-2017 Sylvain Benner & Contributors
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;;
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; URL: https://github.com/syl20bnr/spacemacs
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;;
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;; This file is not part of GNU Emacs.
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;;
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;;; License: GPLv3
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(defun spacemacs//clang-format-on-save ()
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"Format buffers with ClangFormat when they get saved."
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(when c-c++-enable-clang-format-on-save
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(clang-format-buffer)))
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(defun spacemacs/clang-format-on-save ()
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"Add auto-save hook for ClangFormat."
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(add-hook 'before-save-hook 'spacemacs//clang-format-on-save nil t))
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(defun spacemacs/company-more-than-prefix-guesser ()
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(spacemacs/c-c++-load-clang-args)
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(company-clang-guess-prefix))
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;; Based on the Sarcasm/irony-mode compilation database code.
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(defun spacemacs/company-find-clang-complete-file ()
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(when buffer-file-name
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(let ((dir (locate-dominating-file buffer-file-name ".clang_complete")))
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(when dir
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(concat (file-name-as-directory dir) ".clang_complete")))))
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;; Based on the Sarcasm/irony-mode compilation database code.
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(defun spacemacs/company-load-clang-complete-file (cc-file)
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"Load the flags from CC-FILE, one flag per line."
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(let ((invocation-dir (expand-file-name (file-name-directory cc-file)))
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(case-fold-search nil)
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compile-flags)
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(with-temp-buffer
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(insert-file-contents cc-file)
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;; Replace relative paths with absolute paths (by @trishume)
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;; (goto-char (point-min))
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(while (re-search-forward "\\(-I\\|-isystem\n\\)\\(\\S-+\\)" nil t)
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(replace-match (format "%s%s" (match-string 1)
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(expand-file-name (match-string 2)
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invocation-dir))))
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;; Turn lines into a list
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(setq compile-flags
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;; remove whitespaces at the end of each line, if any
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(mapcar #'(lambda (line)
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(if (string-match "[ \t]+$" line)
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(replace-match "" t t line)
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line))
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(split-string (buffer-string) "\n" t))))
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compile-flags))
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(defun spacemacs/c-c++-load-clang-args ()
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"Sets the arguments for company-clang, the system paths for company-c-headers
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and the arguments for flyckeck-clang based on a project-specific text file."
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(unless company-clang-arguments
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(let* ((cc-file (spacemacs/company-find-clang-complete-file))
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(flags (if cc-file
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(spacemacs/company-load-clang-complete-file cc-file)
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'()))
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(dirs (mapcar (lambda (f) (substring f 2))
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(remove-if-not (lambda (f) (string-prefix-p "-I" f))
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flags))))
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(setq-local company-clang-arguments flags)
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(setq-local company-c-headers-path-system
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(append '("/usr/include" "/usr/local/include")
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dirs))
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(setq-local flycheck-clang-args flags))))
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