Merge branch 'master' into core-updates

1 files changed, 0 insertions, 367 deletions

diff --git a/emacs/guix-hydra.el b/emacs/guix-hydra.el
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-;;; guix-hydra.el --- Common code for interacting with Hydra  -*- lexical-binding: t -*-
-
-;; Copyright © 2015 Alex Kost <alezost@gmail.com>
-
-;; This file is part of GNU Guix.
-
-;; GNU Guix 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.
-
-;; GNU Guix 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:
-
-;; This file provides some general code for 'list'/'info' interfaces for
-;; Hydra (Guix build farm).
-
-;;; Code:
-
-(require 'json)
-(require 'guix-buffer)
-(require 'guix-entry)
-(require 'guix-utils)
-(require 'guix-help-vars)
-
-(guix-define-groups hydra)
-
-(defvar guix-hydra-job-regexp
-  (concat ".*\\." (regexp-opt guix-help-system-types) "\\'")
-  "Regexp matching a full name of Hydra job (including system).")
-
-(defun guix-hydra-job-name-specification (name version)
-  "Return Hydra's job name specification by NAME and VERSION."
-  (concat name "-" version))
-
-(defun guix-hydra-message (entries search-type &rest _)
-  "Display a message after showing Hydra ENTRIES."
-  ;; XXX Add more messages maybe.
-  (when (null entries)
-    (if (eq search-type 'fake)
-        (message "The update is impossible due to lack of Hydra API.")
-      (message "Hydra has returned no results."))))
-
-(defun guix-hydra-list-describe (ids)
-  "Describe 'hydra' entries with IDS (list of identifiers)."
-  (guix-buffer-display-entries
-   (guix-entries-by-ids ids (guix-buffer-current-entries))
-   'info (guix-buffer-current-entry-type)
-   ;; Hydra does not provide an API to receive builds/jobsets by
-   ;; IDs/names, so we use a 'fake' search type.
-   '(fake)
-   'add))
-
-
-;;; Readers
-
-(defvar guix-hydra-projects
-  '("gnu" "guix")
-  "List of available Hydra projects.")
-
-(guix-define-readers
- :completions-var guix-hydra-projects
- :single-reader guix-hydra-read-project
- :single-prompt "Project: ")
-
-(guix-define-readers
- :single-reader guix-hydra-read-jobset
- :single-prompt "Jobset: ")
-
-(guix-define-readers
- :single-reader guix-hydra-read-job
- :single-prompt "Job: ")
-
-(guix-define-readers
- :completions-var guix-help-system-types
- :single-reader guix-hydra-read-system
- :single-prompt "System: ")
-
-
-;;; Defining URLs
-
-(defvar guix-hydra-url "http://hydra.gnu.org"
-  "URL of the Hydra build farm.")
-
-(defun guix-hydra-url (&rest url-parts)
-  "Return Hydra URL."
-  (apply #'concat guix-hydra-url "/" url-parts))
-
-(defun guix-hydra-api-url (type args)
-  "Return URL for receiving data using Hydra API.
-TYPE is the name of an allowed method.
-ARGS is alist of (KEY . VALUE) pairs.
-Skip ARG, if VALUE is nil or an empty string."
-  (declare (indent 1))
-  (let* ((fields (mapcar
-                  (lambda (arg)
-                    (pcase arg
-                      (`(,key . ,value)
-                       (unless (or (null value)
-                                   (equal "" value))
-                         (concat (guix-hexify key) "="
-                                 (guix-hexify value))))
-                      (_ (error "Wrong argument '%s'" arg))))
-                  args))
-         (fields (mapconcat #'identity (delq nil fields) "&")))
-    (guix-hydra-url "api/" type "?" fields)))
-
-
-;;; Receiving data from Hydra
-
-(defun guix-hydra-receive-data (url)
-  "Return output received from URL and processed with `json-read'."
-  (with-temp-buffer
-    (url-insert-file-contents url)
-    (goto-char (point-min))
-    (let ((json-key-type 'symbol)
-          (json-array-type 'list)
-          (json-object-type 'alist))
-      (json-read))))
-
-(defun guix-hydra-get-entries (entry-type search-type &rest args)
-  "Receive ENTRY-TYPE entries from Hydra.
-SEARCH-TYPE is one of the types defined by `guix-hydra-define-interface'."
-  (unless (eq search-type 'fake)
-    (let* ((url         (apply #'guix-hydra-search-url
-                               entry-type search-type args))
-           (raw-entries (guix-hydra-receive-data url))
-           (entries     (guix-hydra-filter-entries
-                         raw-entries
-                         (guix-hydra-filters entry-type))))
-      entries)))
-
-
-;;; Filters for processing raw entries
-
-(defun guix-hydra-filter-entries (entries filters)
-  "Filter ENTRIES using FILTERS.
-Call `guix-modify' on each entry from ENTRIES."
-  (mapcar (lambda (entry)
-            (guix-modify entry filters))
-          entries))
-
-(defun guix-hydra-filter-names (entry name-alist)
-  "Replace names of ENTRY parameters using NAME-ALIST.
-Each element of NAME-ALIST is (OLD-NAME . NEW-NAME) pair."
-  (mapcar (lambda (param)
-            (pcase param
-              (`(,name . ,val)
-               (let ((new-name (guix-assq-value name-alist name)))
-                 (if new-name
-                     (cons new-name val)
-                   param)))))
-          entry))
-
-(defun guix-hydra-filter-boolean (entry params)
-  "Convert number PARAMS (0/1) of ENTRY to boolean values (nil/t)."
-  (mapcar (lambda (param)
-            (pcase param
-              (`(,name . ,val)
-               (if (memq name params)
-                   (cons name (guix-number->bool val))
-                 param))))
-          entry))
-
-
-;;; Wrappers for defined variables
-
-(defvar guix-hydra-entry-type-data nil
-  "Alist with hydra entry type data.
-This alist is filled by `guix-hydra-define-entry-type' macro.")
-
-(defun guix-hydra-entry-type-value (entry-type symbol)
-  "Return SYMBOL's value for ENTRY-TYPE from `guix-hydra'."
-  (symbol-value (guix-assq-value guix-hydra-entry-type-data
-                                 entry-type symbol)))
-
-(defun guix-hydra-search-url (entry-type search-type &rest args)
-  "Return URL to receive ENTRY-TYPE entries from Hydra."
-  (apply (guix-assq-value (guix-hydra-entry-type-value
-                           entry-type 'search-types)
-                          search-type)
-         args))
-
-(defun guix-hydra-filters (entry-type)
-  "Return a list of filters for ENTRY-TYPE."
-  (guix-hydra-entry-type-value entry-type 'filters))
-
-
-;;; Interface definers
-
-(defmacro guix-hydra-define-entry-type (entry-type &rest args)
-  "Define general code for ENTRY-TYPE.
-Remaining arguments (ARGS) should have a form [KEYWORD VALUE] ...
-
-Required keywords:
-
-  - `:search-types' - default value of the generated
-    `guix-ENTRY-TYPE-search-types' variable.
-
-Optional keywords:
-
-  - `:filters' - default value of the generated
-    `guix-ENTRY-TYPE-filters' variable.
-
-  - `:filter-names' - if specified, a generated
-    `guix-ENTRY-TYPE-filter-names' function for filtering these
-    names will be added to `guix-ENTRY-TYPE-filters' variable.
-
-  - `:filter-boolean-params' - if specified, a generated
-    `guix-ENTRY-TYPE-filter-boolean' function for filtering these
-    names will be added to `guix-ENTRY-TYPE-filters' variable.
-
-The rest keyword arguments are passed to
-`guix-define-entry-type' macro."
-  (declare (indent 1))
-  (let* ((entry-type-str     (symbol-name entry-type))
-         (prefix             (concat "guix-" entry-type-str))
-         (search-types-var   (intern (concat prefix "-search-types")))
-         (filters-var        (intern (concat prefix "-filters")))
-         (get-fun            (intern (concat prefix "-get-entries"))))
-    (guix-keyword-args-let args
-        ((search-types-val   :search-types)
-         (filters-val        :filters)
-         (filter-names-val   :filter-names)
-         (filter-bool-val    :filter-boolean-params))
-      `(progn
-         (defvar ,search-types-var ,search-types-val
-           ,(format "\
-Alist of search types and according URL functions.
-Functions are used to define URL to receive '%s' entries."
-                    entry-type-str))
-
-         (defvar ,filters-var ,filters-val
-           ,(format "\
-List of filters for '%s' parameters.
-Each filter is a function that should take an entry as a single
-argument, and should also return an entry."
-                    entry-type-str))
-
-         ,(when filter-bool-val
-            (let ((filter-bool-var (intern (concat prefix
-                                                   "-filter-boolean-params")))
-                  (filter-bool-fun (intern (concat prefix
-                                                   "-filter-boolean"))))
-              `(progn
-                 (defvar ,filter-bool-var ,filter-bool-val
-                   ,(format "\
-List of '%s' parameters that should be transformed to boolean values."
-                            entry-type-str))
-
-                 (defun ,filter-bool-fun (entry)
-                   ,(format "\
-Run `guix-hydra-filter-boolean' with `%S' variable."
-                            filter-bool-var)
-                   (guix-hydra-filter-boolean entry ,filter-bool-var))
-
-                 (setq ,filters-var
-                       (cons ',filter-bool-fun ,filters-var)))))
-
-         ;; Do not move this clause up!: name filtering should be
-         ;; performed before any other filtering, so this filter should
-         ;; be consed after the boolean filter.
-         ,(when filter-names-val
-            (let* ((filter-names-var (intern (concat prefix
-                                                     "-filter-names")))
-                   (filter-names-fun filter-names-var))
-              `(progn
-                 (defvar ,filter-names-var ,filter-names-val
-                   ,(format "\
-Alist of '%s' parameter names returned by Hydra API and names
-used internally by the elisp code of this package."
-                            entry-type-str))
-
-                 (defun ,filter-names-fun (entry)
-                   ,(format "\
-Run `guix-hydra-filter-names' with `%S' variable."
-                            filter-names-var)
-                   (guix-hydra-filter-names entry ,filter-names-var))
-
-                 (setq ,filters-var
-                       (cons ',filter-names-fun ,filters-var)))))
-
-         (defun ,get-fun (search-type &rest args)
-           ,(format "\
-Receive '%s' entries.
-See `guix-hydra-get-entries' for details."
-                    entry-type-str)
-           (apply #'guix-hydra-get-entries
-                  ',entry-type search-type args))
-
-         (guix-alist-put!
-          '((search-types . ,search-types-var)
-            (filters      . ,filters-var))
-          'guix-hydra-entry-type-data ',entry-type)
-
-         (guix-define-entry-type ,entry-type
-           :parent-group guix-hydra
-           :parent-faces-group guix-hydra-faces
-           ,@%foreign-args)))))
-
-(defmacro guix-hydra-define-interface (buffer-type entry-type &rest args)
-  "Define BUFFER-TYPE interface for displaying ENTRY-TYPE entries.
-
-This macro should be called after calling
-`guix-hydra-define-entry-type' with the same ENTRY-TYPE.
-
-ARGS are passed to `guix-BUFFER-TYPE-define-interface' macro."
-  (declare (indent 2))
-  (let* ((entry-type-str  (symbol-name entry-type))
-         (buffer-type-str (symbol-name buffer-type))
-         (get-fun         (intern (concat "guix-" entry-type-str
-                                          "-get-entries")))
-         (definer         (intern (concat "guix-" buffer-type-str
-                                          "-define-interface"))))
-    `(,definer ,entry-type
-       :get-entries-function ',get-fun
-       :message-function 'guix-hydra-message
-       ,@args)))
-
-(defmacro guix-hydra-info-define-interface (entry-type &rest args)
-  "Define 'info' interface for displaying ENTRY-TYPE entries.
-See `guix-hydra-define-interface'."
-  (declare (indent 1))
-  `(guix-hydra-define-interface info ,entry-type
-     ,@args))
-
-(defmacro guix-hydra-list-define-interface (entry-type &rest args)
-  "Define 'list' interface for displaying ENTRY-TYPE entries.
-Remaining arguments (ARGS) should have a form [KEYWORD VALUE] ...
-
-Optional keywords:
-
-  - `:describe-function' - default value of the generated
-    `guix-ENTRY-TYPE-list-describe-function' variable (if not
-    specified, use `guix-hydra-list-describe').
-
-The rest keyword arguments are passed to
-`guix-hydra-define-interface' macro."
-  (declare (indent 1))
-  (guix-keyword-args-let args
-      ((describe-val :describe-function))
-    `(guix-hydra-define-interface list ,entry-type
-       :describe-function ,(or describe-val ''guix-hydra-list-describe)
-       ,@args)))
-
-
-(defvar guix-hydra-font-lock-keywords
-  (eval-when-compile
-    `((,(rx "(" (group (or "guix-hydra-define-entry-type"
-                           "guix-hydra-define-interface"
-                           "guix-hydra-info-define-interface"
-                           "guix-hydra-list-define-interface"))
-            symbol-end)
-       . 1))))
-
-(font-lock-add-keywords 'emacs-lisp-mode guix-hydra-font-lock-keywords)
-
-(provide 'guix-hydra)
-
-;;; guix-hydra.el ends here