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-;;; company-cmake.el --- company-mode completion backend for CMake
-
-;; Copyright (C) 2013-2015, 2017-2018, 2020 Free Software Foundation, Inc.
-
-;; Author: Chen Bin <chenbin DOT sh AT gmail>
-;; Version: 0.2
-
-;; 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:
-;;
-;; company-cmake offers completions for module names, variable names and
-;; commands used by CMake. And their descriptions.
-
-;;; Code:
-
-(require 'company)
-(require 'cl-lib)
-
-(defgroup company-cmake nil
- "Completion backend for CMake."
- :group 'company)
-
-(defcustom company-cmake-executable
- (executable-find "cmake")
- "Location of cmake executable."
- :type 'file)
-
-(defvar company-cmake-executable-arguments
- '("--help-command-list"
- "--help-module-list"
- "--help-property-list"
- "--help-variable-list")
- "The arguments we pass to cmake, separately.
-They affect which types of symbols we get completion candidates for.")
-
-(defvar company-cmake--completion-pattern
- "^\\(%s[a-zA-Z0-9_<>]%s\\)$"
- "Regexp to match the candidates.")
-
-(defvar company-cmake-modes '(cmake-mode)
- "Major modes in which cmake may complete.")
-
-(defvar company-cmake--candidates-cache nil
- "Cache for the raw candidates.")
-
-(defvar company-cmake--meta-command-cache nil
- "Cache for command arguments to retrieve descriptions for the candidates.")
-
-(defun company-cmake--replace-tags (rlt)
- (setq rlt (replace-regexp-in-string
- "\\(.*?\\(IS_GNU\\)?\\)<LANG>\\(.*\\)"
- (lambda (_match)
- (mapconcat 'identity
- (if (match-beginning 2)
- '("\\1CXX\\3" "\\1C\\3" "\\1G77\\3")
- '("\\1CXX\\3" "\\1C\\3" "\\1Fortran\\3"))
- "\n"))
- rlt t))
- (setq rlt (replace-regexp-in-string
- "\\(.*\\)<CONFIG>\\(.*\\)"
- (mapconcat 'identity '("\\1DEBUG\\2" "\\1RELEASE\\2"
- "\\1RELWITHDEBINFO\\2" "\\1MINSIZEREL\\2")
- "\n")
- rlt))
- rlt)
-
-(defun company-cmake--fill-candidates-cache (arg)
- "Fill candidates cache if needed."
- (let (rlt)
- (unless company-cmake--candidates-cache
- (setq company-cmake--candidates-cache (make-hash-table :test 'equal)))
-
- ;; If hash is empty, fill it.
- (unless (gethash arg company-cmake--candidates-cache)
- (with-temp-buffer
- (let ((res (call-process company-cmake-executable nil t nil arg)))
- (unless (zerop res)
- (message "cmake executable exited with error=%d" res)))
- (setq rlt (buffer-string)))
- (setq rlt (company-cmake--replace-tags rlt))
- (puthash arg rlt company-cmake--candidates-cache))
- ))
-
-(defun company-cmake--parse (prefix content cmd)
- (let ((start 0)
- (pattern (format company-cmake--completion-pattern
- (regexp-quote prefix)
- (if (zerop (length prefix)) "+" "*")))
- (lines (split-string content "\n"))
- match
- rlt)
- (dolist (line lines)
- (when (string-match pattern line)
- (let ((match (match-string 1 line)))
- (when match
- (puthash match cmd company-cmake--meta-command-cache)
- (push match rlt)))))
- rlt))
-
-(defun company-cmake--candidates (prefix)
- (let (results
- cmd-opts
- str)
-
- (unless company-cmake--meta-command-cache
- (setq company-cmake--meta-command-cache (make-hash-table :test 'equal)))
-
- (dolist (arg company-cmake-executable-arguments)
- (company-cmake--fill-candidates-cache arg)
- (setq cmd-opts (replace-regexp-in-string "-list$" "" arg) )
-
- (setq str (gethash arg company-cmake--candidates-cache))
- (when str
- (setq results (nconc results
- (company-cmake--parse prefix str cmd-opts)))))
- results))
-
-(defun company-cmake--unexpand-candidate (candidate)
- (cond
- ((string-match "^CMAKE_\\(C\\|CXX\\|Fortran\\)\\(_.*\\)$" candidate)
- (setq candidate (concat "CMAKE_<LANG>" (match-string 2 candidate))))
-
- ;; C flags
- ((string-match "^\\(.*_\\)IS_GNU\\(C\\|CXX\\|G77\\)$" candidate)
- (setq candidate (concat (match-string 1 candidate) "IS_GNU<LANG>")))
-
- ;; C flags
- ((string-match "^\\(.*_\\)OVERRIDE_\\(C\\|CXX\\|Fortran\\)$" candidate)
- (setq candidate (concat (match-string 1 candidate) "OVERRIDE_<LANG>")))
-
- ((string-match "^\\(.*\\)\\(_DEBUG\\|_RELEASE\\|_RELWITHDEBINFO\\|_MINSIZEREL\\)\\(.*\\)$" candidate)
- (setq candidate (concat (match-string 1 candidate)
- "_<CONFIG>"
- (match-string 3 candidate)))))
- candidate)
-
-(defun company-cmake--meta (candidate)
- (let ((cmd-opts (gethash candidate company-cmake--meta-command-cache))
- result)
- (setq candidate (company-cmake--unexpand-candidate candidate))
-
- ;; Don't cache the documentation of every candidate (command)
- ;; Cache in this case will cost too much memory.
- (with-temp-buffer
- (call-process company-cmake-executable nil t nil cmd-opts candidate)
- ;; Go to the third line, trim it and return the result.
- ;; Tested with cmake 2.8.9.
- (goto-char (point-min))
- (forward-line 2)
- (setq result (buffer-substring-no-properties (line-beginning-position)
- (line-end-position)))
- (setq result (replace-regexp-in-string "^[ \t\n\r]+" "" result))
- result)))
-
-(defun company-cmake--doc-buffer (candidate)
- (let ((cmd-opts (gethash candidate company-cmake--meta-command-cache)))
-
- (setq candidate (company-cmake--unexpand-candidate candidate))
- (with-temp-buffer
- (call-process company-cmake-executable nil t nil cmd-opts candidate)
- ;; Go to the third line, trim it and return the doc buffer.
- ;; Tested with cmake 2.8.9.
- (goto-char (point-min))
- (forward-line 2)
- (company-doc-buffer
- (buffer-substring-no-properties (line-beginning-position)
- (point-max))))))
-
-(defun company-cmake-prefix-dollar-brace-p ()
- "Test if the current symbol follows ${."
- (save-excursion
- (skip-syntax-backward "w_")
- (and (eq (char-before (point)) ?\{)
- (eq (char-before (1- (point))) ?$))))
-
-(defun company-cmake (command &optional arg &rest ignored)
- "`company-mode' completion backend for CMake.
-CMake is a cross-platform, open-source make system."
- (interactive (list 'interactive))
- (cl-case command
- (interactive (company-begin-backend 'company-cmake))
- (init (when (memq major-mode company-cmake-modes)
- (unless company-cmake-executable
- (error "Company found no cmake executable"))))
- (prefix (and (memq major-mode company-cmake-modes)
- (or (not (company-in-string-or-comment))
- (company-cmake-prefix-dollar-brace-p))
- (company-grab-symbol)))
- (candidates (company-cmake--candidates arg))
- (meta (company-cmake--meta arg))
- (doc-buffer (company-cmake--doc-buffer arg))
- ))
-
-(provide 'company-cmake)
-;;; company-cmake.el ends here
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-10 08:36:04 +0000