;;; csharp-compilation.el --- compilation support for C#  -*- lexical-binding: t; -*-

;; Copyright (C) 2020-2021 Free Software Foundation, Inc.

;; Author     : Theodor Thornhill <theo@thornhill.no>
;; Maintainer : Jostein Kjønigsen <jostein@gmail.com>
;;              Theodor Thornhill <theo@thornhill.no>
;; Created    : September 2020
;; Modified   : 2020
;; Version    : 2.0.0
;; Keywords   : c# languages oop mode
;; X-URL      : https://github.com/emacs-csharp/csharp-mode

;; 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 <http://www.gnu.org/licenses/>.


(require 'compile)

;; When invoked by MSBuild, csc’s errors look like this:
;; subfolder\file.cs(6,18): error CS1006: Name of constructor must
;; match name of class [c:\Users\user\project.csproj]

(defun csharp--compilation-error-file-resolve ()
  "Resolve an msbuild error to a (filename . dirname) cons cell."
  ;; http://stackoverflow.com/a/18049590/429091
  (cons (match-string 1) (file-name-directory (match-string 4))))

(defconst csharp-compilation-re-msbuild-error
  (concat
   "^[[:blank:]]*\\(?:[[:digit:]]+>\\)?"
   "\\([^(\r\n)]+\\)(\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?): "
   "error [[:alnum:]]+: [^\r\n]+\\[\\([^]\r\n]+\\)\\]$")
  "Regexp to match compilation error from msbuild.")

(defconst csharp-compilation-re-msbuild-warning
  (concat
   "^[[:blank:]]*\\(?:[[:digit:]]+>\\)?"
   "\\([^(\r\n)]+\\)(\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?): "
   "warning [[:alnum:]]+: [^\r\n]+\\[\\([^]\r\n]+\\)\\]$")
  "Regexp to match compilation warning from msbuild.")

;; Notes on xbuild and devenv commonalities
;;
;; These regexes were tailored for xbuild, but apart from the concurrent
;; build-marker ("1>") they share exactly the same match-markers.
;;
;; If we don't exclude the match-markers explicitly, these regexes
;; will also be used to match for devenv as well, including the build-marker
;; in the file-name, causing the lookup to fail.
;;
;; So if we don't want devenv to fail, we actually need to handle it in our
;; xbuild-regexes, but then we automatically get devenv-support for free.

(defconst csharp-compilation-re-xbuild-error
  (concat
   "^[[:blank:]]*\\(?:[[:digit:]]+>\\)?"
   "\\([^(\r\n)]+\\)(\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?"
   ;; handle weird devenv output format with 4 numbers, not 2 by having optional
   ;; extra capture-groups.
   "\\(?:,\\([0-9]+\\)\\)*): "
   "error [[:alnum:]]+: .+$")
  "Regexp to match compilation error from xbuild.")

(defconst csharp-compilation-re-xbuild-warning
  (concat
   "^[[:blank:]]*\\(?:[[:digit:]]+>\\)?"
   "\\([^(\r\n)]+\\)(\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?"
   ;; handle weird devenv output format with 4 numbers, not 2 by having optional
   ;; extra capture-groups.
   "\\(?:,\\([0-9]+\\)\\)*): "
   "warning [[:alnum:]]+: .+$")
  "Regexp to match compilation warning from xbuild.")

(defconst csharp-compilation-re-dotnet-error
  "\\([^\r\n]+\\) : error [A-Z]+[0-9]+:")

(defconst csharp-compilation-re-dotnet-warning
  "\\([^\r\n]+\\) : warning [A-Z]+[0-9]+:")

(defconst csharp-compilation-re-dotnet-testfail
  (concat
   "[[:blank:]]+Stack Trace:\n"
   "[[:blank:]]+at [^\n]+ in \\([^\n]+\\):line \\([0-9]+\\)"))


(eval-after-load 'compile
  (lambda ()
    (dolist
        (regexp
         `((dotnet-testfail
            ,csharp-compilation-re-dotnet-testfail
            1 2)
           (xbuild-error
            ,csharp-compilation-re-xbuild-error
            1 2 3 2)
           (xbuild-warning
            ,csharp-compilation-re-xbuild-warning
            1 2 3 1)
           (msbuild-error
            ,csharp-compilation-re-msbuild-error
            csharp--compilation-error-file-resolve
            2
            3
            2
            nil
            (1 compilation-error-face)
            (4 compilation-error-face))
           (msbuild-warning
            ,csharp-compilation-re-msbuild-warning
            csharp--compilation-error-file-resolve
            2
            3
            1
            nil
            (1 compilation-warning-face)
            (4 compilation-warning-face))
           (dotnet-error
            ,csharp-compilation-re-dotnet-error
            1)
           (dotnet-warning
            ,csharp-compilation-re-dotnet-warning
            1 nil nil 1)))
      (add-to-list 'compilation-error-regexp-alist-alist regexp)
      (add-to-list 'compilation-error-regexp-alist (car regexp)))))

(provide 'csharp-compilation)

;;; csharp-compilation.el ends here