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Diffstat (limited to 'emacs/guix-hydra.el')
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diff --git a/emacs/guix-hydra.el b/emacs/guix-hydra.el new file mode 100644 index 0000000000..429483946b --- /dev/null +++ b/emacs/guix-hydra.el @@ -0,0 +1,363 @@ +;;; 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-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 |