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magithub-issue-post.el
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magithub-issue-post.el
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;;; magithub-issue-post.el --- -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2018 Sean Allred
;; Author: Sean Allred <code@seanallred.com>
;; 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:
;;; Code:
(require 'magithub-core)
(require 'magithub-repo)
(require 'magithub-issue)
(require 'magithub-label)
(require 'magithub-edit-mode)
(declare-function magithub-issue-view "magithub-issue-view.el" (issue))
(defvar-local magithub-issue--extra-data nil)
(defun magithub-issue-post-submit ()
(interactive)
(let ((issue (magithub-issue-post--parse-buffer))
(repo (magithub-repo)))
(when (s-blank-p (alist-get 'title issue))
(user-error "Title is required"))
(when (magithub-repo-push-p repo)
(when-let ((issue-labels (magithub-label-read-labels "Labels: ")))
(push (cons 'labels issue-labels) issue)))
(magithub-confirm 'submit-issue)
(let ((issue (magithub-request
(ghubp-post-repos-owner-repo-issues repo issue))))
(magithub-edit-delete-draft)
(magithub-issue-view issue))))
(defun magithub-issue-post--parse-buffer ()
(let ((lines (split-string (buffer-string) "\n")))
`((title . ,(s-trim (car lines)))
(body . ,(s-trim (mapconcat #'identity (cdr lines) "\n"))))))
(defun magithub-issue-new (repo)
(interactive (list (magithub-repo)))
(let* ((repo (magithub-repo repo))
(name (magithub-repo-name repo)))
(with-current-buffer
(magithub-edit-new (format "*magithub-issue: %s*" name)
:header (format "Creating an issue for %s" name)
:submit #'magithub-issue-post-submit
:file (expand-file-name "new-issue-draft"
(magithub-repo-data-dir repo))
:template (magithub-issue--template-text "ISSUE_TEMPLATE"))
(font-lock-add-keywords nil `((,(rx bos (group (*? any)) eol) 1
'magithub-issue-title-edit t)))
(magithub-bug-reference-mode-on)
(magit-display-buffer (current-buffer)))))
(defun magithub-pull-request-new-from-issue
(repo issue base head &optional maintainer-can-modify)
"Create a pull request from an existing issue.
REPO is the parent repository of ISSUE. BASE and HEAD are as
they are in `magithub-pull-request-new'."
(interactive (if-let ((issue-at-point (thing-at-point 'github-issue)))
(let-alist (magithub-pull-request-new-arguments)
(let ((allow-maint-mod (magithub-confirm-no-error
'pr-allow-maintainers-to-submit)))
(magithub-confirm 'submit-pr-from-issue
(magithub-issue-reference issue-at-point)
.user+head .base)
(list .repo issue-at-point .base .head allow-maint-mod)))
(user-error "No issue detected at point")))
(let ((pull-request `((head . ,head)
(base . ,base)
(issue . ,(alist-get 'number issue)))))
(when maintainer-can-modify
(push (cons 'maintainer_can_modify t) pull-request))
(magithub-request
(ghubp-post-repos-owner-repo-pulls repo pull-request))))
(defun magithub-issue--template-text (template)
(with-temp-buffer
(when-let ((template (magithub-issue--template-find template)))
(insert-file-contents template)
(buffer-string))))
(defun magithub-issue--template-find (filename)
"Find an appropriate template called FILENAME and returns its absolute path.
See also URL
`https://github.com/blog/2111-issue-and-pull-request-templates'"
(let ((default-directory (magit-toplevel))
combinations)
(dolist (tryname (list filename (concat filename ".md")))
(dolist (trydir (list default-directory (expand-file-name ".github/")))
(push (expand-file-name tryname trydir) combinations)))
(-find #'file-readable-p combinations)))
(defun magithub-remote-branches (remote)
"Return a list of branches on REMOTE."
(let ((regexp (concat (regexp-quote remote) (rx "/" (group (* any))))))
(--map (and (string-match regexp it)
(match-string 1 it))
(magit-list-remote-branch-names remote))))
(defun magithub-remote-branches-choose (prompt remote &optional default)
"Using PROMPT, choose a branch on REMOTE."
(let ((branches (magithub-remote-branches remote)))
(magit-completing-read
(format "[%s] %s"
(magithub-repo-name (magithub-repo-from-remote remote))
prompt)
branches
nil t nil nil (and (member default branches) default))))
(defun magithub-pull-request-new-arguments ()
(unless (magit-get-push-remote)
(user-error "Nothing on remote yet; have you pushed your branch? Aborting"))
(let* ((this-repo (magithub-read-repo "Fork's remote (this is you!) " (ghubp-username) t))
(this-repo-owner (let-alist this-repo .owner.login))
(parent-repo (or (alist-get 'parent this-repo) this-repo))
(this-remote (car (magithub-repo-remotes-for-repo this-repo)))
(on-this-remote (string= (magit-get-push-remote) this-remote))
(base-remote (car (magithub-repo-remotes-for-repo parent-repo)))
(head-branch (let ((branch (magithub-remote-branches-choose
"Head branch" this-remote
(when on-this-remote
(magit-get-current-branch)))))
(unless (magit-rev-verify (magit-get-push-branch branch))
(user-error "`%s' has not yet been pushed to your fork (%s)"
branch (magithub-repo-name this-repo)))
branch))
(base (magithub-remote-branches-choose
"Base branch" base-remote
(or (and on-this-remote
(magit-get-upstream-branch head-branch))
(let-alist parent-repo .default_branch))))
(user+head (format "%s:%s" this-repo-owner head-branch)))
(when (magithub-request (ghubp-get-repos-owner-repo-pulls parent-repo nil
:head user+head))
(user-error "A pull request on %s already exists for head \"%s\""
(magithub-repo-name parent-repo)
user+head))
`((repo . ,parent-repo)
(base . ,base)
(head . ,(if (string= this-remote base-remote)
head-branch
user+head))
(head-no-user . ,head-branch)
(fork . ,this-repo)
(user+head . ,user+head))))
(defun magithub-pull-request-new (repo base head head-no-user)
"Create a new pull request."
(interactive (let-alist (magithub-pull-request-new-arguments)
(magithub-confirm 'pre-submit-pr .user+head
(magithub-repo-name .repo) .base)
(list .repo .base .head .head-no-user)))
(let ((is-single-commit
(string= "1" (magit-git-string "rev-list" "--count" (format "%s.." base)))))
(unless is-single-commit
(apply #'magit-log-other (list (format "%s..%s" base head)) (magit-log-arguments)))
(with-current-buffer
(let ((template (magithub-issue--template-text "PULL_REQUEST_TEMPLATE")))
(magithub-edit-new (format "*magithub-pull-request: %s into %s:%s*"
head
(magithub-repo-name repo)
base)
:header (let-alist repo (format "PR %s/%s (%s->%s)"
.owner.login .name head base))
:submit #'magithub-pull-request-submit
:file (expand-file-name "new-pull-request-draft"
(magithub-repo-data-dir repo))
:template template
:content (when is-single-commit
;; when we only want to merge one commit
;; insert that commit message as the initial content
(concat
(with-temp-buffer
(magit-git-insert "show" "-q" head-no-user "--format=%B")
(let ((fill-column (point-max)))
(fill-region (point-min) (point-max))
(buffer-string)))
template))))
(font-lock-add-keywords nil `((,(rx bos (group (*? any)) eol) 1
'magithub-issue-title-edit t)))
(magithub-bug-reference-mode-on)
(setq magithub-issue--extra-data
`((base . ,base) (head . ,head) (repo . ,repo)))
(magit-display-buffer (current-buffer)))))
(defun magithub-pull-request-submit ()
(interactive)
(let ((pull-request `(,@(magithub-issue-post--parse-buffer)
(base . ,(alist-get 'base magithub-issue--extra-data))
(head . ,(alist-get 'head magithub-issue--extra-data)))))
(when (s-blank-p (alist-get 'title pull-request))
(user-error "Title is required"))
(magithub-confirm 'submit-pr)
(when (magithub-confirm-no-error 'pr-allow-maintainers-to-submit)
(push (cons 'maintainer_can_modify t) pull-request))
(let ((pr (condition-case _
(magithub-request
(ghubp-post-repos-owner-repo-pulls
(alist-get 'repo magithub-issue--extra-data)
pull-request))
(ghub-422
(user-error "This pull request already exists!")))))
(magithub-edit-delete-draft)
(magithub-issue-view pr))))
(provide 'magithub-issue-post)
;;; magithub-issue-post.el ends here