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magithub-ci.el
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magithub-ci.el
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;;; magithub-ci.el --- Show CI status as a magit-status header -*- lexical-binding: t; -*-
;; Copyright (C) 2016-2018 Sean Allred
;; Author: Sean Allred <[email protected]>
;; Keywords: tools
;; 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/>.
;;; Commentary:
;; Provide the CI status of "origin" in the Magit status buffer.
;;; Code:
(require 'magit)
(require 'magit-section)
(require 'dash)
(require 's)
(require 'magithub-core)
(require 'magithub-issue)
;;;###autoload
(defun magithub-maybe-insert-ci-status-header ()
"If this is a GitHub repository, insert the CI status header."
(when (and (magithub-settings-include-status-p)
(magithub-usable-p)
(let ((b (magit-get-current-branch)))
(or (magit-get-upstream-remote b)
(magit-get-push-remote b))))
(magithub-insert-ci-status-header)))
(defvar magithub-ci--status-last-refreshed nil
"An alist of alists: repos to refs to times.
For efficiency, repos are represented only by their full names.")
(defun magithub-ci--status-last-refreshed-time (repo ref)
"The last time the statuses for REPO@REF were retrieved.
This is a generalized variable and can be set with `setf'."
(declare (gv-setter
(lambda (time)
`(let ((repo (magithub-repo-name ,repo)))
(if-let ((statuses (assoc repo magithub-ci--status-last-refreshed)))
(if-let ((status (assoc ,ref (cdr statuses))))
(setcdr status ,time)
(push (cons ,ref ,time) (cdr statuses)))
(push (cons repo (list (cons ,ref ,time)))
magithub-ci--status-last-refreshed))))))
'(thread-last magithub-ci--status-last-refreshed
(assoc (magithub-repo-name repo)) (cdr)
(assoc ref) (cdr))
(cdr (assoc ref (cdr (assoc (magithub-repo-name repo)
magithub-ci--status-last-refreshed)))))
(defun magithub-pull-request-pr->branch (pull-request)
"Does not handle cases where the local branch has been renamed."
(let-alist pull-request .head.ref))
(define-error 'magithub-error-ambiguous-branch "Ambiguous Branch" 'magithub-error)
(defun magithub-pull-request-branch->pr--ghub (branch)
"This is a hueristic; it's not 100% accurate.
It may fail if the fork has multiple branches named BRANCH."
(let ((repo (magithub-repo-from-remote (magit-get-push-remote branch))))
(when (alist-get 'fork repo)
(let* ((guess-head (format "%s:%s" (magit-get-push-remote branch) branch))
(prs (magithub-cache :ci-status
`(magithub-request
(ghubp-get-repos-owner-repo-pulls ',(magithub-repo) :head ,guess-head)))))
(pcase (length prs)
(0) ; this branch does not seem to correspond to any PR
(1 (magit-set (number-to-string (alist-get 'number (car prs)))
"branch" branch "magithub" "sourcePR")
(car prs))
(_ ;; todo: currently unhandled
(signal 'magithub-error-ambiguous-branch
(list :prs prs
:guess-head guess-head
:repo-from-remote (alist-get 'full_name repo)
:source-repo (alist-get 'full_name (magithub-repo))))))))))
(defun magithub-pull-request-branch->pr--gitconfig (branch)
"Gets a pull request object from branch.BRANCH.magithub.sourcePR"
(when-let ((source (magit-get "branch" branch "magithub" "sourcePR")))
(magithub-pull-request (magithub-repo) (string-to-number source))))
(defun magithub-ci-status--get-default-ref (&optional branch)
"The ref to use for CI status based on BRANCH.
Handles cases where the local branch's name is different than its
remote counterpart."
(setq branch (or branch (magit-get-current-branch)))
(if (or (magithub-pull-request-branch->pr--gitconfig branch)
(and (magithub-online-p)
(with-demoted-errors "Error: %S"
(magithub-pull-request-branch->pr--ghub branch))))
(magit-rev-parse branch)
(when-let ((push-branch (magit-get-push-branch branch)))
(when (magit-branch-p push-branch)
(cdr (magit-split-branch-name push-branch))))))
(defun magithub-ci-status (ref)
(when (stringp ref)
(if (magit-rebase-in-progress-p)
;; avoid rate-limiting ourselves
(magithub-debug-message "skipping CI status checks while in rebase")
(or (magithub-cache :ci-status
`(magithub-request
(ghubp-get-repos-owner-repo-commits-ref-status
',(magithub-repo) ,ref))
:message
(format "Getting CI status for %s..."
(if (magit-branch-p ref) (format "branch `%s'" ref)
(substring ref 0 6)))
:after-update
(lambda (status &rest _)
(setf (magithub-ci--status-last-refreshed-time (magithub-repo) ref)
(current-time))
(message "(magithub): new statuses retrieved -- overall: %s"
(alist-get 'state status))))
'((state . "error")
(total_count . 0)
(magithub-message . "ref not found on remote"))))))
(defvar magithub-ci-status-alist
'((nil . ((display . "None") (face . magithub-ci-no-status)))
("error" . ((display . "Error") (face . magithub-ci-error)))
("failure" . ((display . "Failure") (face . magithub-ci-failure)))
("pending" . ((display . "Pending") (face . magithub-ci-pending)))
("success" . ((display . "Success") (face . magithub-ci-success)))))
(defconst magithub-ci-status--unknown
'((face . magithub-ci-unknown)))
(defun magithub-ci-pr-status (pr)
(interactive (list (thing-at-point 'github-pull-request)))
(unless pr
(user-error "no pr at point"))
(message "state of #%d: %s"
(let-alist pr .number)
(let-alist (ghubp-get-repos-owner-repo-commits-ref-status
(magithub-repo)
(let-alist pr .head.sha))
.state)))
(defun magithub-ci-visit (ref)
"Jump to CI with `browse-url'."
(interactive (list (magit-rev-parse (magit-commit-at-point))))
(let (done)
(when (null ref)
(pcase (oref (magit-current-section) value)
(`(magithub-ci-url . ,url)
(browse-url url)
(setq done t))
(`(magithub-ci-ref . ,secref)
(setq ref secref))))
(unless done
(let* ((urls (alist-get 'statuses (magithub-ci-status ref)))
(status
(cond
((= 1 (length urls)) (car urls))
(urls (magithub--completing-read
"Status service: " urls
#'magithub-ci--format-status)))))
(let-alist status
(when (or (null .target_url) (string= "" .target_url))
(user-error "No Status URL detected"))
(browse-url .target_url))))))
(defun magithub-ci--format-status (status)
(let-alist status
(format "(%s) %s: %s"
(let ((spec (magithub-ci--status-spec .state)))
(alist-get 'display spec .state))
.context
.description)))
(defvar magit-magithub-ci-status-section-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map magithub-map)
(define-key map [remap magit-visit-thing] #'magithub-ci-visit)
(define-key map [remap magithub-browse-thing] #'magithub-ci-visit)
(define-key map [remap magit-refresh] #'magithub-ci-refresh)
map)
"Keymap for `magithub-ci-status' header section.")
(defun magithub-ci-refresh ()
"Invalidate the CI cache and refresh the buffer."
(interactive)
(unless (magithub-online-p)
(magithub-confirm 'ci-refresh-when-offline))
(magithub-cache-without-cache :ci-status
(magithub-ci-status (magithub-ci-status--get-default-ref)))
(magit-refresh))
(defun magithub-insert-ci-status-header ()
(let* ((ref (magithub-ci-status--get-default-ref))
(checks (magithub-ci-status ref))
(indent (make-string 10 ?\ )))
(when checks
(magit-insert-section (magithub-ci-status
`(magithub-ci-ref . ,ref)
'collapsed)
(magit-insert-heading
(format "%-10s%s %s %s%s" "Status:"
(magithub-ci--status-header checks)
(propertize "on ref" 'face 'magit-dimmed)
(propertize ref 'face 'magit-refname)
(propertize "..." 'face 'magit-dimmed)))
(magit-insert-section-body
(insert (propertize
(format "%-10sas of %s\n" ""
(if-let ((time (magithub-ci--status-last-refreshed-time (magithub-repo) ref)))
(magithub--format-time time)
"???"))
'face 'magit-dimmed))
(dolist (status (alist-get 'statuses checks))
(magit-insert-section (magithub-ci-status
`(magithub-ci-url . ,(alist-get 'target_url status)))
(insert indent (magithub-ci--status-propertized status "*"))
(magit-insert-heading))))))))
(defun magithub-ci--status-header (checks)
(pcase (alist-get 'total_count checks)
(0 (format "%s %s"
(magithub-ci--status-propertized checks)
(or (alist-get 'magithub-message checks)
(propertize "it seems checks have not yet begun"
'face 'magit-dimmed))))
(1 (magithub-ci--status-propertized checks))
(_ (let* ((overall-status (alist-get 'state checks))
(status-spec (magithub-ci--status-spec overall-status))
(display (or (alist-get 'display status-spec) overall-status))
(statuses (alist-get 'statuses checks))
(passed (-filter (lambda (s) (string= "success" (alist-get 'state s)))
statuses)))
(propertize (format "%s (%d/%d)" display (length passed) (length statuses))
'face (alist-get 'face status-spec))))))
(defun magithub-ci--status-spec (status-string)
(or (cdr (assoc-string status-string magithub-ci-status-alist))
magithub-ci-status--unknown))
(defun magithub-ci--status-propertized (status &optional override-status-text)
(let ((status-string (alist-get 'state status))
(description (alist-get 'description status))
(context (alist-get 'context status)))
(let-alist (magithub-ci--status-spec status-string)
(concat (propertize (or override-status-text
.display
status-string)
'face .face)
(when description
(format " %s" description))
(when context
(propertize (format " %s" context)
'face 'magit-dimmed))))))
(provide 'magithub-ci)
;;; magithub-ci.el ends here