forked from ben/dotfiles
174 lines
6.6 KiB
EmacsLisp
174 lines
6.6 KiB
EmacsLisp
;;; magit-collab.el --- collaboration tools -*- lexical-binding: t -*-
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;; Copyright (C) 2010-2018 The Magit Project Contributors
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;;
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;; You should have received a copy of the AUTHORS.md file which
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;; lists all contributors. If not, see http://magit.vc/authors.
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;; Author: Jonas Bernoulli <jonas@bernoul.li>
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;; Maintainer: Jonas Bernoulli <jonas@bernoul.li>
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;; Magit is free software; you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;;
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;; Magit is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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;; License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with Magit. If not, see http://www.gnu.org/licenses.
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;;; Commentary:
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;; This library implements various collaboration tools. These tools
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;; are only early incarnation -- implementing collaboration tools is
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;; a top priority for future development.
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;; Currently these tools (including `magit-branch-pull-request', which
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;; is defined elsewhere) only support Github, but support for other
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;; Git forges as well as mailing list based collaboration is in
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;; planning.
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;;; Code:
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(require 'magit)
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(require 'ghub)
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;;; Variables
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(defvar magit-github-token-scopes '(repo)
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"The Github API scopes needed by Magit.
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`repo' is the only required scope. Without this scope none of
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Magit's features that use the API work. Instead of this scope
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you could use `public_repo' if you are only interested in public
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repositories.
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`repo' Grants read/write access to code, commit statuses,
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invitations, collaborators, adding team memberships, and
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deployment statuses for public and private repositories
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and organizations.
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`public_repo' Grants read/write access to code, commit statuses,
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collaborators, and deployment statuses for public repositories
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and organizations. Also required for starring public
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repositories.")
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;;; Commands
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;;;###autoload
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(defun magit-browse-pull-request (pr)
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"Visit pull-request PR using `browse-url'.
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Currently this only supports Github, but that restriction will
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be lifted eventually to support other Git forges."
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(interactive (list (magit-read-pull-request "Visit pull request")))
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(browse-url (format "https://github.com/%s/pull/%s"
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(--> pr
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(cdr (assq 'base it))
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(cdr (assq 'repo it))
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(cdr (assq 'full_name it)))
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(cdr (assq 'number pr)))))
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;;; Utilities
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(defun magit-read-pull-request (prompt)
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"Read a pull request from the user, prompting with PROMPT.
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Return the Git forge's API response. Currently this function
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only supports Github, but that will change eventually."
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(let* ((origin (magit-upstream-repository))
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(id (magit--forge-id origin))
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(fmtfun (lambda (pull-request)
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(format "%s %s"
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(cdr (assq 'number pull-request))
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(cdr (assq 'title pull-request)))))
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(prs (ghub-get (format "/repos/%s/pulls" id) nil :auth 'magit))
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(choice (magit-completing-read
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prompt (mapcar fmtfun prs) nil nil nil nil
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(let ((default (thing-at-point 'github-pull-request)))
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(and default (funcall fmtfun default)))))
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(number (and (string-match "\\([0-9]+\\)" choice)
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(string-to-number (match-string 1 choice)))))
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(and number
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;; Don't reuse the pr from the list, it lacks some information
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;; that is only returned when requesting a single pr. #3371
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(ghub-get (format "/repos/%s/pulls/%s" id number)
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nil :auth 'magit))))
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(defun magit-upstream-repository ()
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"Return the remote name of the upstream repository.
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If the Git variable `magit.upstream' is set, then return its
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value. Otherwise return \"origin\". If the remote does not
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exist, then raise an error."
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(let ((remote (or (magit-get "magit.upstream") "origin")))
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(unless (magit-remote-p remote)
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(error "No remote named `%s' exists (consider setting `magit.upstream')"
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remote))
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(unless (magit--github-remote-p remote)
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(error "Currently only Github is supported"))
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remote))
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(defun magit--forge-id (remote)
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(let ((url (magit-get "remote" remote "url")))
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(and (string-match "\\([^:/]+/[^/]+?\\)\\(?:\\.git\\)?\\'" url)
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(match-string 1 url))))
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(defconst magit--github-url-regexp "\
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\\`\\(?:git://\\|git@\\|ssh://git@\\|https://\\)\
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\\(.*?\\)[/:]\
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\\(\\([^:/]+\\)/\\([^/]+?\\)\\)\
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\\(?:\\.git\\)?\\'")
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(defun magit--github-url-p (url)
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(save-match-data
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(and url
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(string-match magit--github-url-regexp url)
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(let ((host (match-string 1 url)))
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;; Match values like "github.com-as-someone", which are
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;; translated to just "github.com" according to settings
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;; in "~/.ssh/config". Theoretically this could result
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;; in false-positives, but that's rather unlikely. #3392
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(and (or (string-match-p (regexp-quote "github.com") host)
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(string-match-p
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(regexp-quote (car (split-string (ghub--host) "/")))
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host))
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host)))))
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(defun magit--github-remote-p (remote)
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(or (--when-let (magit-git-string "remote" "get-url" "--push" remote)
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(magit--github-url-p it))
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(--when-let (magit-git-string "remote" "get-url" "--all" remote)
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(magit--github-url-p it))))
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(defun magit--github-url-equal (r1 r2)
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(or (equal r1 r2)
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(save-match-data
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(let ((n1 (and (string-match magit--github-url-regexp r1)
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(match-string 2 r1)))
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(n2 (and (string-match magit--github-url-regexp r2)
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(match-string 2 r2))))
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(and n1 n2 (equal n1 n2))))))
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(defun magit--pullreq-from-upstream-p (pr)
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(let-alist pr
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(equal .head.repo.full_name
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.base.repo.full_name)))
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(defun magit--pullreq-branch (pr &optional assert-new)
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(let-alist pr
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(let ((branch .head.ref))
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(when (and (not (magit--pullreq-from-upstream-p pr))
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(or (not .maintainer_can_modify)
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(magit-branch-p branch)))
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(setq branch (format "pr-%s" .number)))
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(when (and assert-new (magit-branch-p branch))
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(user-error "Branch `%s' already exists" branch))
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branch)))
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(provide 'magit-collab)
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;;; magit-collab.el ends here
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