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;;; fetch-includes.el --- add headers to clang checker -*- lexical-binding: t; -*-
;; Copyright (C) 2018 Benj Bellon
;; Author: Benj Bellon
;; Keywords: lisp
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Parses the compile_commands.json db and adds headers
;; to company-mode's company-clang backend.
;;; Code:
(require 'json)
(require 'dash)
(defun get-commands (json-file)
"Retrieves list of command strings possibly including header paths.
JSON-FILE is the path to the json-file to parse."
(let* ((json-object-type 'hash-table)
(json-array-type 'list)
(json-key-type 'string)
(json (json-read-file json-file)))
(mapcar
(function (lambda (el) (gethash "command" el)))
json)))
(defun get-include-paths (commands-list)
"Retrieve the include paths from a list of string which may be include paths.
COMMANDS-LIST a list of commands"
(remove nil
(mapcar
(function (lambda (cmd) (if (string-match "-I" cmd) cmd)))
(split-string commands-list))))
(defun company-clang-header-paths (db-path)
"Provides list of include paths to add to company-clang backend.
DB-PATH the path to compile_commands.json"
(-flatten (mapcar
(function (lambda(cmd-list)
(get-include-paths cmd-list)))
(get-commands db-path))))
(provide 'fetch-includes)
;;; fetch-includes.el ends here
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