343 lines
15 KiB
EmacsLisp
343 lines
15 KiB
EmacsLisp
;;; core-spacemacs.el --- Spacemacs Core File
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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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(defconst spacemacs-repository "spacemacs"
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"Name of the Spacemacs remote repository.")
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(defconst spacemacs-repository-owner "syl20bnr"
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"Name of the Spacemacs remote repository owner.")
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(defconst spacemacs-checkversion-remote "checkversion"
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"Name of the remote repository used to check for new version.")
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(defconst spacemacs-checkversion-branch "master"
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"Name of the branch used to check for new version.")
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(defvar dotspacemacs-check-for-update)
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(defvar spacemacs-version)
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;; new version variables
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(defvar spacemacs-new-version nil
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"If non-nil a new Spacemacs version is available.")
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;; used to be "6 hours" but we now check for new versions only at startup
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(defvar spacemacs-version-check-interval nil
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"Time between two version checks.")
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(defvar spacemacs-version-check-lighter "[+]"
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"Text displayed in the mode-line when a new version is available.")
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(defvar spacemacs-version--check-timer nil
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"The current timer for new version check.")
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(defvar spacemacs-version--last-startup-check-file
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(expand-file-name (concat spacemacs-cache-directory "last-version-check"))
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"File where the last startup version check time is stored.")
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(defvar spacemacs-version--last-startup-check-time nil
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"Time of last version check.")
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(defvar spacemacs-version--startup-check-interval (* 3600 24)
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"Minimum number of seconds between two version checks at startup.")
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(defun spacemacs/switch-to-version (&optional version)
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"Switch spacemacs to VERSION.
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VERSION is a string with the format `x.x.x'.
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IMPORTANT: The switch is performed by hard resetting the current branch.
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If VERSION is nil then a prompt will ask for a version number.
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If the current version is not `master' and not `develop' then
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a prompt will ask for confirmation before actually switching to the
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specified version.
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It is not possible to switch version when you are on `develop' branch,
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users on `develop' branch must manually pull last commits instead."
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(interactive)
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(let ((branch (spacemacs//git-get-current-branch))
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(dirty (spacemacs//git-working-directory-dirty)))
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(unless version
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(message "Getting version information...")
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(let ((last-version (spacemacs/get-last-version)))
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(setq version (read-string
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(format "Version (default %s [latest]): " last-version)
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nil nil last-version))))
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(cond ((string-equal "develop" branch)
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(message (concat "Cannot switch version because you are on "
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"develop.\n"
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"You have to manually `pull --rebase' the latest "
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"commits.")))
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(dirty
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(message (concat "Your Emacs directory is not clean.\n"
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"git status:\n%s") dirty))
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((string-equal version spacemacs-version)
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(message "You are already on the latest version."))
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((or (string-equal "master" branch)
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(yes-or-no-p
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(format (concat "You are not on master. "
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"This command will switch branches.\n"
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"Are you sure that you want to switch "
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"to version %s ? ")
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version)))
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(let ((tag (concat "v" version)))
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(if (spacemacs//git-hard-reset-to-tag tag)
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(progn
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(setq spacemacs-version version)
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(message "Successfully switched to version %s" version))
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(message "An error occurred while switching to version %s"
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version))))
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(t (message "Update aborted.")))))
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(defun spacemacs/check-for-new-version (force &optional interval)
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"Periodically check for new for new Spacemacs version.
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Update `spacemacs-new-version' variable if any new version has been
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found."
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(interactive "P")
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(cond
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((and (not force)
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(not dotspacemacs-check-for-update))
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(message "Skipping check for new version (reason: dotfile)"))
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((and (not force)
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(string-equal "develop" (spacemacs//git-get-current-branch)))
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(message "Skipping check for new version (reason: develop branch)"))
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((and (not force)
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(not (spacemacs//can-check-for-new-version-at-startup)))
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(message (concat "Skipping check for new version "
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"(reason: last check is too recent)")))
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((require 'async nil t)
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(message "Start checking for new version...")
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(async-start
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`(lambda ()
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,(async-inject-variables "\\`spacemacs-start-directory\\'")
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(load-file (concat spacemacs-start-directory
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"core/core-load-paths.el"))
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(require 'core-spacemacs)
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(spacemacs/get-last-version))
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(lambda (result)
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(if result
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(if (or (version< result spacemacs-version)
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(string= result spacemacs-version)
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(if spacemacs-new-version
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(string= result spacemacs-new-version)))
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(message "Spacemacs is up to date.")
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(message "New version of Spacemacs available: %s" result)
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(setq spacemacs-new-version result))
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(message "Unable to check for new version."))))
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(when interval
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(setq spacemacs-version--check-timer
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(run-at-time t (timer-duration interval)
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'spacemacs/check-for-new-version))))
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(t (message "Skipping check for new version (reason: async not loaded)"))))
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(defun spacemacs/git-get-current-branch-rev ()
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"Returns the hash of the head commit on the current branch.
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Returns nil if an error occurred."
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(let ((proc-buffer "git-get-current-branch-head-hash")
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(default-directory (file-truename spacemacs-start-directory)))
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(when (eq 0 (process-file "git" nil proc-buffer nil
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"rev-parse" "--short" "HEAD"))
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(with-current-buffer proc-buffer
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(prog1
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(when (buffer-string)
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(goto-char (point-min))
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(replace-regexp-in-string
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"\n$" ""
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(buffer-substring (line-beginning-position)
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(line-end-position))))
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(kill-buffer proc-buffer))))))
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(defun spacemacs/get-new-version-lighter-face (current new)
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"Return the new version lighter face given the difference between the CURRENT
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version and the NEW version."
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(let* ((lcur (version-to-list current))
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(lnew (version-to-list new))
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(scur (spacemacs//compute-version-score lcur))
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(snew (spacemacs//compute-version-score lnew))
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(diff (- snew scur)))
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(cond
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((< diff 3000) 'spacemacs-mode-line-new-version-lighter-success-face)
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((< diff 5000) 'spacemacs-mode-line-new-version-lighter-warning-face)
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(t 'spacemacs-mode-line-new-version-lighter-error-face))))
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(defun spacemacs/get-last-version ()
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"Return the last tagged version."
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(interactive)
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(spacemacs//get-last-version spacemacs-repository
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spacemacs-repository-owner
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spacemacs-checkversion-remote
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spacemacs-checkversion-branch))
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(defun spacemacs//can-check-for-new-version-at-startup ()
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"Return non-nil if the version check at startup can be performed."
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(when (file-exists-p spacemacs-version--last-startup-check-file)
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(load spacemacs-version--last-startup-check-file))
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(let ((result
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(or (null spacemacs-version--last-startup-check-time)
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(> (- (float-time) spacemacs-version--last-startup-check-time)
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spacemacs-version--startup-check-interval))))
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(when result
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(setq spacemacs-version--last-startup-check-time (float-time))
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(spacemacs/dump-vars-to-file '(spacemacs-version--last-startup-check-time)
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spacemacs-version--last-startup-check-file))
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result))
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(defun spacemacs//get-last-version (repo owner remote branch)
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"Return the last tagged version of BRANCH on REMOTE repository from
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OWNER REPO."
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(let ((url (format "https://github.com/%s/%s" owner repo)))
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(spacemacs//git-remove-remote remote)
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(spacemacs//git-add-remote remote url)
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;; removing this call according to issue #6692 proposal
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;; (spacemacs//git-fetch-remote remote)
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(spacemacs//git-fetch-tags remote branch))
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(let ((version (spacemacs//git-latest-tag remote branch)))
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(when version
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(save-match-data
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(string-match "^.*\\([0-9]+\\.[0-9]+\\.[0-9]+\\)$" version)
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(match-string 1 version)))))
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(defun spacemacs//git-has-remote (remote)
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"Return non nil if REMOTE is declared."
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(let ((proc-buffer "git-has-remote")
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(default-directory (file-truename spacemacs-start-directory)))
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(when (eq 0 (process-file "git" nil proc-buffer nil "remote"))
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(with-current-buffer proc-buffer
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(prog2
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(goto-char (point-min))
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(re-search-forward (format "^%s$" remote) nil 'noerror)
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(kill-buffer proc-buffer))))))
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(defun spacemacs//git-add-remote (remote url)
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"Add a REMOTE with URL, return t if no error."
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(let ((proc-buffer "git-add-remote")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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(eq 0 (process-file "git" nil proc-buffer nil
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"remote" "add" remote url))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-remove-remote (remote)
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"Remove a REMOTE, return t if no error."
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(let ((proc-buffer "git-remove-remote")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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(eq 0 (process-file "git" nil proc-buffer nil
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"remote" "remove" remote))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-fetch-remote (remote)
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"Fetch last commits from REMOTE, return t if no error."
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(let ((proc-buffer "git-fetch-remote")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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(eq 0 (process-file "git" nil proc-buffer nil
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"fetch" remote))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-fetch-tags (remote branch)
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"Fetch the tags for BRANCH in REMOTE repository."
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(let ((proc-buffer "git-fetch-tags")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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;;;; original comment: seems necessary to fetch first
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;; but we remove this according to issue #6692 proposal
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;; (eq 0 (process-file "git" nil proc-buffer nil
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;; "fetch" remote branch))
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;; explicitly fetch the new tags
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(eq 0 (process-file "git" nil proc-buffer nil
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"fetch" "--tags" remote branch))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-hard-reset-to-tag (tag)
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"Hard reset the current branch to specifed TAG."
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(let ((proc-buffer "git-hard-reset")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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(eq 0 (process-file "git" nil proc-buffer nil
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"reset" "--hard" tag))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-latest-tag (remote branch)
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"Returns the latest tag on REMOTE/BRANCH."
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(let ((proc-buffer "git-latest-tag")
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(default-directory (file-truename spacemacs-start-directory))
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(where (format "%s/%s" remote branch)))
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(when (eq 0 (process-file "git" nil proc-buffer nil
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"describe" "--tags" "--abbrev=0"
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"--match=v*" where "FETCH_HEAD"))
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(with-current-buffer proc-buffer
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(prog1
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(when (buffer-string)
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(goto-char (point-max))
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(forward-line -1)
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(replace-regexp-in-string
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"\n$" ""
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(buffer-substring (line-beginning-position)
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(line-end-position))))
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(kill-buffer proc-buffer))))))
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(defun spacemacs//git-checkout (branch)
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"Checkout the given BRANCH. Return t if there is no error."
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(let ((proc-buffer "git-checkout")
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(default-directory (file-truename spacemacs-start-directory)))
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(prog1
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(eq 0 (process-file "git" nil proc-buffer nil
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"checkout" branch))
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(kill-buffer proc-buffer))))
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(defun spacemacs//git-get-current-branch ()
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"Return the current branch. Return nil if an error occurred."
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(let ((proc-buffer "git-get-current-branch")
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(default-directory (file-truename spacemacs-start-directory)))
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(when (eq 0 (process-file "git" nil proc-buffer nil
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"symbolic-ref" "--short" "-q" "HEAD"))
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(with-current-buffer proc-buffer
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(prog1
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(when (buffer-string)
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(goto-char (point-min))
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(replace-regexp-in-string
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"\n$" ""
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(buffer-substring (line-beginning-position)
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(line-end-position))))
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(kill-buffer proc-buffer))))))
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(defun spacemacs//git-working-directory-dirty ()
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"Non-nil if the user's emacs directory is not clean.
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Returns the output of git status --porcelain."
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(let ((proc-buffer "git-working-directory-dirty")
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(default-directory (file-truename spacemacs-start-directory)))
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(when (eq 0 (process-file "git" nil proc-buffer nil
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"status" "--porcelain"))
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(with-current-buffer proc-buffer
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(prog1
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(when (and (buffer-string)
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;;simplecheckforanytext
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(string-match-p "[^ \t\n]" (buffer-string)))
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(replace-regexp-in-string "\n\\'" "" (buffer-string)))
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(kill-buffer proc-buffer))))))
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(defun spacemacs//deffaces-new-version-lighter (state)
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"Define a new version lighter face for the given STATE."
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(let* ((fname (intern
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(format "spacemacs-mode-line-new-version-lighter-%s-face"
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(symbol-name state))))
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(foreground (face-foreground state)))
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(eval `(defface ,fname '((t ()))
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,(format "Color for new version lighter in mode line (%s)."
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(symbol-name state))
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:group 'spacemacs))
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(set-face-attribute fname nil
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:foreground foreground
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:box (face-attribute 'mode-line :box))))
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(defun spacemacs//compute-version-score (version)
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"Returns an integer from the version list.
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Example: (1 42 3) = 1 042 003"
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(let ((i -1))
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(cl-reduce '+ (mapcar (lambda (n) (setq i (1+ i)) (* n (expt 10 (* i 3))))
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(reverse version)))))
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(defun spacemacs/set-new-version-lighter-mode-line-faces ()
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"Define or set the new version lighter mode-line faces."
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(mapcar 'spacemacs//deffaces-new-version-lighter
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'(error warning success)))
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(spacemacs/set-new-version-lighter-mode-line-faces)
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(add-hook 'spacemacs-post-theme-change-hook
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'spacemacs/set-new-version-lighter-mode-line-faces)
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(provide 'core-release-management)
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