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;;; jao-compilation.el --- utilities to lauch compilations -*- lexical-binding: t; -*-
;; Copyright (C) 2020, 2021 jao
;; Author: jao <mail@jao.io>
;; Keywords: convenience
;; 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:
;; Utilities to launch compilation processes from adequate root directories
;;; Code:
(defvar jao-compilation-dominating-files nil)
(defvar jao-compilation-dominating-file-rxs '(".+\\.cabal"))
(defvar jao-compilation-environment ())
(defvar jao-compilation-dominating-rx "")
(defun jao-compilation--environment ()
(let (result)
(dolist (v jao-compilation-environment result)
(let ((vv (getenv v)))
(when vv (add-to-list 'result (format "%s=%s" v vv)))))))
;;;###autoload
(defun jao-compilation-add-dominating (&rest fs)
(dolist (f fs) (add-to-list 'jao-compilation-dominating-files f))
(setq jao-compilation-dominating-rx
(concat "\\("
(regexp-opt jao-compilation-dominating-files)
"\\|"
(mapconcat 'identity
jao-compilation-dominating-file-rxs
"\\|")
"\\)$")))
;;;###autoload
(defun jao-path-relative-to (path base)
(let* ((path (file-name-directory path))
(base (file-name-directory base))
(blen (length base)))
(if (<= (length path) blen)
path
(if (string-equal base (substring path 0 blen))
(substring path blen)
path))))
;;;###autoload
(defun jao-compilation-find-root (file doms)
(when file
(locate-dominating-file file `(lambda (d)
(when (file-directory-p d)
(directory-files d nil ,doms))))))
;;;###autoload
(defun jao-compilation-root (&optional dir)
(when-let ((rfn (jao-compilation-find-root (or dir (buffer-file-name))
jao-compilation-dominating-rx)))
(let* ((default-directory (expand-file-name rfn))
(dir (file-name-directory rfn))
(rel-path (jao-path-relative-to dir default-directory)))
(if (and (file-directory-p "build")
(not (file-exists-p "build.xml"))
(not (file-exists-p "setup.py")))
(expand-file-name rel-path (expand-file-name "build/"))
default-directory))))
;;;###autoload
(defun jao-compilation-root-file ()
(when-let ((dir (jao-compilation-root)))
(car (directory-files dir nil jao-compilation-dominating-rx))))
;;;###autoload
(defun jao-find-compilation-root (dir)
(when (and (stringp dir) (file-exists-p dir))
(when-let ((root (jao-compilation-root dir)))
(cons 'transient root))))
;;;###autoload
(defun jao-compilation-env (v)
"Add new environment variables to the compilation environment
used by `jao-compile'"
(add-to-list 'jao-compilation-environment v))
;;;###autoload
(defun jao-compile ()
"Find the root of current file's project and issue a
compilation command"
(interactive)
(let ((default-directory (jao-compilation-root))
(compilation-environment (jao-compilation--environment))
(compilation-read-command 'compilation-read-command))
(call-interactively 'compile)))
;;;###autoload
(defun jao-compilation-setup ()
(jao-compilation-add-dominating
"Makefile" "makefile" "configure.ac" "bootstrap.sh" "aclocal.m4"
"project.clj" "build.xml" "pom.xml" "setup.py" "stack.yaml")
(with-eval-after-load "project"
(add-to-list 'project-find-functions #'jao-find-compilation-root)))
(provide 'jao-compilation)
;;; jao-compilation.el ends here
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