32950fc846
* emacs/guix-utils.el (guix-hexify, guix-number->bool): New procedures. (guix-while-null): New macro. * emacs/guix-hydra.el: New file. * emacs/guix-hydra-build.el: New file. * emacs/guix-hydra-jobset.el: New file. * emacs.am (ELFILES): Add them. * doc/emacs.texi (Emacs Hydra): New node. (Emacs Interface): Add it. * doc/guix.texi (Top): Add it. (Substitutes): Mention Emacs interface.
567 lines
19 KiB
EmacsLisp
567 lines
19 KiB
EmacsLisp
;;; guix-utils.el --- General utility functions -*- lexical-binding: t -*-
|
||
|
||
;; Copyright © 2014, 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 auxiliary general functions for guix.el package.
|
||
|
||
;;; Code:
|
||
|
||
(require 'cl-lib)
|
||
|
||
(defvar guix-true-string "Yes")
|
||
(defvar guix-false-string "–")
|
||
(defvar guix-list-separator ", ")
|
||
|
||
(defvar guix-time-format "%F %T"
|
||
"String used to format time values.
|
||
For possible formats, see `format-time-string'.")
|
||
|
||
(defun guix-get-string (val &optional face)
|
||
"Convert VAL into a string and return it.
|
||
|
||
VAL can be an expression of any type.
|
||
If VAL is t/nil, it is replaced with
|
||
`guix-true-string'/`guix-false-string'.
|
||
If VAL is list, its elements are concatenated using
|
||
`guix-list-separator'.
|
||
|
||
If FACE is non-nil, propertize returned string with this FACE."
|
||
(let ((str (cond
|
||
((stringp val) val)
|
||
((null val) guix-false-string)
|
||
((eq t val) guix-true-string)
|
||
((numberp val) (number-to-string val))
|
||
((listp val) (mapconcat #'guix-get-string
|
||
val guix-list-separator))
|
||
(t (prin1-to-string val)))))
|
||
(if (and val face)
|
||
(propertize str 'font-lock-face face)
|
||
str)))
|
||
|
||
(defun guix-get-time-string (seconds)
|
||
"Return formatted time string from SECONDS.
|
||
Use `guix-time-format'."
|
||
(format-time-string guix-time-format (seconds-to-time seconds)))
|
||
|
||
(defun guix-get-one-line (str)
|
||
"Return one-line string from a multi-line STR."
|
||
(replace-regexp-in-string "\n" " " str))
|
||
|
||
(defmacro guix-with-indent (indent &rest body)
|
||
"Evaluate BODY and indent inserted text by INDENT number of spaces."
|
||
(declare (indent 1) (debug t))
|
||
(let ((region-beg-var (make-symbol "region-beg"))
|
||
(indent-var (make-symbol "indent")))
|
||
`(let ((,region-beg-var (point))
|
||
(,indent-var ,indent))
|
||
,@body
|
||
(unless (zerop ,indent-var)
|
||
(indent-rigidly ,region-beg-var (point) ,indent-var)))))
|
||
|
||
(defun guix-format-insert (val &optional face format)
|
||
"Convert VAL into a string and insert it at point.
|
||
If FACE is non-nil, propertize VAL with FACE.
|
||
If FORMAT is non-nil, format VAL with FORMAT."
|
||
(let ((str (guix-get-string val face)))
|
||
(insert (if format
|
||
(format format str)
|
||
str))))
|
||
|
||
(defun guix-mapinsert (function sequence separator)
|
||
"Like `mapconcat' but for inserting text.
|
||
Apply FUNCTION to each element of SEQUENCE, and insert SEPARATOR
|
||
at point between each FUNCTION call."
|
||
(when sequence
|
||
(funcall function (car sequence))
|
||
(mapc (lambda (obj)
|
||
(insert separator)
|
||
(funcall function obj))
|
||
(cdr sequence))))
|
||
|
||
(defun guix-insert-button (label &optional type &rest properties)
|
||
"Make button of TYPE with LABEL and insert it at point.
|
||
See `insert-text-button' for the meaning of PROPERTIES."
|
||
(if (null label)
|
||
(guix-format-insert nil)
|
||
(apply #'insert-text-button label
|
||
:type (or type 'button)
|
||
properties)))
|
||
|
||
(defun guix-buttonize (value button-type separator &rest properties)
|
||
"Make BUTTON-TYPE button(s) from VALUE.
|
||
Return a string with button(s).
|
||
|
||
VALUE should be a string or a list of strings. If it is a list
|
||
of strings, buttons are separated with SEPARATOR string.
|
||
|
||
PROPERTIES are passed to `guix-insert-button'."
|
||
(with-temp-buffer
|
||
(let ((labels (if (listp value) value (list value))))
|
||
(guix-mapinsert (lambda (label)
|
||
(apply #'guix-insert-button
|
||
label button-type properties))
|
||
labels
|
||
separator))
|
||
(buffer-substring (point-min) (point-max))))
|
||
|
||
(defun guix-button-type? (symbol)
|
||
"Return non-nil, if SYMBOL is a button type."
|
||
(and symbol
|
||
(get symbol 'button-category-symbol)))
|
||
|
||
(defun guix-split-insert (val &optional face col separator)
|
||
"Convert VAL into a string, split it and insert at point.
|
||
|
||
If FACE is non-nil, propertize returned string with this FACE.
|
||
|
||
If COL is non-nil and result string is a one-line string longer
|
||
than COL, split it into several short lines.
|
||
|
||
Separate inserted lines with SEPARATOR."
|
||
(if (null val)
|
||
(guix-format-insert nil)
|
||
(let ((strings (guix-split-string (guix-get-string val) col)))
|
||
(guix-mapinsert (lambda (str) (guix-format-insert str face))
|
||
strings
|
||
(or separator "")))))
|
||
|
||
(defun guix-split-string (str &optional col)
|
||
"Split string STR by lines and return list of result strings.
|
||
If COL is non-nil, fill STR to this column."
|
||
(let ((str (if col
|
||
(guix-get-filled-string str col)
|
||
str)))
|
||
(split-string str "\n *" t)))
|
||
|
||
(defun guix-get-filled-string (str col)
|
||
"Return string by filling STR to column COL."
|
||
(with-temp-buffer
|
||
(insert str)
|
||
(let ((fill-column col))
|
||
(fill-region (point-min) (point-max)))
|
||
(buffer-string)))
|
||
|
||
(defun guix-concat-strings (strings separator &optional location)
|
||
"Return new string by concatenating STRINGS with SEPARATOR.
|
||
If LOCATION is a symbol `head', add another SEPARATOR to the
|
||
beginning of the returned string; if `tail' - add SEPARATOR to
|
||
the end of the string; if nil, do not add SEPARATOR; otherwise
|
||
add both to the end and to the beginning."
|
||
(let ((str (mapconcat #'identity strings separator)))
|
||
(cond ((null location)
|
||
str)
|
||
((eq location 'head)
|
||
(concat separator str))
|
||
((eq location 'tail)
|
||
(concat str separator))
|
||
(t
|
||
(concat separator str separator)))))
|
||
|
||
(defun guix-hexify (value)
|
||
"Convert VALUE to string and hexify it."
|
||
(url-hexify-string (guix-get-string value)))
|
||
|
||
(defun guix-number->bool (number)
|
||
"Convert NUMBER to boolean value.
|
||
Return nil, if NUMBER is 0; return t otherwise."
|
||
(not (zerop number)))
|
||
|
||
(defun guix-shell-quote-argument (argument)
|
||
"Quote shell command ARGUMENT.
|
||
This function is similar to `shell-quote-argument', but less strict."
|
||
(if (equal argument "")
|
||
"''"
|
||
(replace-regexp-in-string
|
||
"\n" "'\n'"
|
||
(replace-regexp-in-string
|
||
(rx (not (any alnum "-=,./\n"))) "\\\\\\&" argument))))
|
||
|
||
(defun guix-symbol-title (symbol)
|
||
"Return SYMBOL's name, a string.
|
||
This is like `symbol-name', but fancier."
|
||
(if (eq symbol 'id)
|
||
"ID"
|
||
(let ((str (replace-regexp-in-string "-" " " (symbol-name symbol))))
|
||
(concat (capitalize (substring str 0 1))
|
||
(substring str 1)))))
|
||
|
||
(defun guix-command-symbol (&optional args)
|
||
"Return symbol by concatenating 'guix' and ARGS (strings)."
|
||
(intern (guix-concat-strings (cons "guix" args) "-")))
|
||
|
||
(defun guix-command-string (&optional args)
|
||
"Return 'guix ARGS ...' string with quoted shell arguments."
|
||
(let ((args (mapcar #'guix-shell-quote-argument args)))
|
||
(guix-concat-strings (cons "guix" args) " ")))
|
||
|
||
(defun guix-copy-as-kill (string &optional no-message?)
|
||
"Put STRING into `kill-ring'.
|
||
If NO-MESSAGE? is non-nil, do not display a message about it."
|
||
(kill-new string)
|
||
(unless no-message?
|
||
(message "'%s' has been added to kill ring." string)))
|
||
|
||
(defun guix-copy-command-as-kill (args &optional no-message?)
|
||
"Put 'guix ARGS ...' string into `kill-ring'.
|
||
See also `guix-copy-as-kill'."
|
||
(guix-copy-as-kill (guix-command-string args) no-message?))
|
||
|
||
(defun guix-completing-read (prompt table &optional predicate
|
||
require-match initial-input
|
||
hist def inherit-input-method)
|
||
"Same as `completing-read' but return nil instead of an empty string."
|
||
(let ((res (completing-read prompt table predicate
|
||
require-match initial-input
|
||
hist def inherit-input-method)))
|
||
(unless (string= "" res) res)))
|
||
|
||
(defun guix-completing-read-multiple (prompt table &optional predicate
|
||
require-match initial-input
|
||
hist def inherit-input-method)
|
||
"Same as `completing-read-multiple' but remove duplicates in result."
|
||
(cl-remove-duplicates
|
||
(completing-read-multiple prompt table predicate
|
||
require-match initial-input
|
||
hist def inherit-input-method)
|
||
:test #'string=))
|
||
|
||
(declare-function org-read-date "org" t)
|
||
|
||
(defun guix-read-date (prompt)
|
||
"Prompt for a date or time using `org-read-date'.
|
||
Return time value."
|
||
(require 'org)
|
||
(org-read-date nil t nil prompt))
|
||
|
||
(defun guix-read-file-name (prompt &optional dir default-filename
|
||
mustmatch initial predicate)
|
||
"Read file name.
|
||
This function is similar to `read-file-name' except it also
|
||
expands the file name."
|
||
(expand-file-name (read-file-name prompt dir default-filename
|
||
mustmatch initial predicate)))
|
||
|
||
(defcustom guix-find-file-function #'find-file
|
||
"Function used to find a file.
|
||
The function is called by `guix-find-file' with a file name as a
|
||
single argument."
|
||
:type '(choice (function-item find-file)
|
||
(function-item org-open-file)
|
||
(function :tag "Other function"))
|
||
:group 'guix)
|
||
|
||
(defun guix-find-file (file)
|
||
"Find FILE if it exists."
|
||
(if (file-exists-p file)
|
||
(funcall guix-find-file-function file)
|
||
(message "File '%s' does not exist." file)))
|
||
|
||
(defvar url-handler-regexp)
|
||
|
||
(defun guix-find-file-or-url (file-or-url)
|
||
"Find FILE-OR-URL."
|
||
(require 'url-handlers)
|
||
(let ((file-name-handler-alist
|
||
(cons (cons url-handler-regexp 'url-file-handler)
|
||
file-name-handler-alist)))
|
||
(find-file file-or-url)))
|
||
|
||
(defmacro guix-while-search (regexp &rest body)
|
||
"Evaluate BODY after each search for REGEXP in the current buffer."
|
||
(declare (indent 1) (debug t))
|
||
`(save-excursion
|
||
(goto-char (point-min))
|
||
(while (re-search-forward ,regexp nil t)
|
||
,@body)))
|
||
|
||
(defmacro guix-while-null (&rest body)
|
||
"Evaluate BODY until its result becomes non-nil."
|
||
(declare (indent 0) (debug t))
|
||
(let ((result-var (make-symbol "result")))
|
||
`(let (,result-var)
|
||
(while (null ,result-var)
|
||
(setq ,result-var ,@body))
|
||
,result-var)))
|
||
|
||
(defun guix-modify (object modifiers)
|
||
"Apply MODIFIERS to OBJECT.
|
||
OBJECT is passed as an argument to the first function from
|
||
MODIFIERS list, the returned result is passed to the second
|
||
function from the list and so on. Return result of the last
|
||
modifier call."
|
||
(if (null modifiers)
|
||
object
|
||
(guix-modify (funcall (car modifiers) object)
|
||
(cdr modifiers))))
|
||
|
||
(defmacro guix-keyword-args-let (args varlist &rest body)
|
||
"Parse ARGS, bind variables from VARLIST and eval BODY.
|
||
|
||
Find keyword values in ARGS, bind them to variables according to
|
||
VARLIST, then evaluate BODY.
|
||
|
||
ARGS is a keyword/value property list.
|
||
|
||
Each element of VARLIST has a form:
|
||
|
||
(SYMBOL KEYWORD [DEFAULT-VALUE])
|
||
|
||
SYMBOL is a varible name. KEYWORD is a symbol that will be
|
||
searched in ARGS for an according value. If the value of KEYWORD
|
||
does not exist, bind SYMBOL to DEFAULT-VALUE or nil.
|
||
|
||
The rest arguments (that present in ARGS but not in VARLIST) will
|
||
be bound to `%foreign-args' variable.
|
||
|
||
Example:
|
||
|
||
(guix-keyword-args-let '(:two 8 :great ! :guix is)
|
||
((one :one 1)
|
||
(two :two 2)
|
||
(foo :smth))
|
||
(list one two foo %foreign-args))
|
||
|
||
=> (1 8 nil (:guix is :great !))"
|
||
(declare (indent 2))
|
||
(let ((args-var (make-symbol "args")))
|
||
`(let (,@(mapcar (lambda (spec)
|
||
(pcase-let ((`(,name ,_ ,val) spec))
|
||
(list name val)))
|
||
varlist)
|
||
(,args-var ,args)
|
||
%foreign-args)
|
||
(while ,args-var
|
||
(pcase ,args-var
|
||
(`(,key ,val . ,rest-args)
|
||
(cl-case key
|
||
,@(mapcar (lambda (spec)
|
||
(pcase-let ((`(,name ,key ,_) spec))
|
||
`(,key (setq ,name val))))
|
||
varlist)
|
||
(t (setq %foreign-args
|
||
(cl-list* key val %foreign-args))))
|
||
(setq ,args-var rest-args))))
|
||
,@body)))
|
||
|
||
|
||
;;; Alist procedures
|
||
|
||
(defmacro guix-define-alist-accessor (name assoc-fun)
|
||
"Define NAME function to access alist values using ASSOC-FUN."
|
||
`(defun ,name (alist &rest keys)
|
||
,(format "Return value from ALIST by KEYS using `%s'.
|
||
ALIST is alist of alists of alists ... which can be consecutively
|
||
accessed with KEYS."
|
||
assoc-fun)
|
||
(if (or (null alist) (null keys))
|
||
alist
|
||
(apply #',name
|
||
(cdr (,assoc-fun (car keys) alist))
|
||
(cdr keys)))))
|
||
|
||
(guix-define-alist-accessor guix-assq-value assq)
|
||
(guix-define-alist-accessor guix-assoc-value assoc)
|
||
|
||
(defun guix-alist-put (value alist &rest keys)
|
||
"Put (add or replace if exists) VALUE to ALIST using KEYS.
|
||
Return the new alist.
|
||
|
||
ALIST is alist of alists of alists ... which can be consecutively
|
||
accessed with KEYS.
|
||
|
||
Example:
|
||
|
||
(guix-alist-put
|
||
'foo
|
||
'((one (a . 1) (b . 2))
|
||
(two (m . 7) (n . 8)))
|
||
'one 'b)
|
||
|
||
=> ((one (a . 1) (b . foo))
|
||
(two (m . 7) (n . 8)))"
|
||
(or keys (error "Keys should be specified"))
|
||
(guix-alist-put-1 value alist keys))
|
||
|
||
(defun guix-alist-put-1 (value alist keys)
|
||
"Subroutine of `guix-alist-put'."
|
||
(cond
|
||
((null keys)
|
||
value)
|
||
((null alist)
|
||
(list (cons (car keys)
|
||
(guix-alist-put-1 value nil (cdr keys)))))
|
||
((eq (car keys) (caar alist))
|
||
(cons (cons (car keys)
|
||
(guix-alist-put-1 value (cdar alist) (cdr keys)))
|
||
(cdr alist)))
|
||
(t
|
||
(cons (car alist)
|
||
(guix-alist-put-1 value (cdr alist) keys)))))
|
||
|
||
(defun guix-alist-put! (value variable &rest keys)
|
||
"Modify alist VARIABLE (symbol) by putting VALUE using KEYS.
|
||
See `guix-alist-put' for details."
|
||
(set variable
|
||
(apply #'guix-alist-put value (symbol-value variable) keys)))
|
||
|
||
|
||
;;; Diff
|
||
|
||
(defvar guix-diff-switches "-u"
|
||
"A string or list of strings specifying switches to be passed to diff.")
|
||
|
||
(defun guix-diff (old new &optional switches no-async)
|
||
"Same as `diff', but use `guix-diff-switches' as default."
|
||
(diff old new (or switches guix-diff-switches) no-async))
|
||
|
||
|
||
;;; Completing readers definers
|
||
|
||
(defmacro guix-define-reader (name read-fun completions prompt)
|
||
"Define NAME function to read from minibuffer.
|
||
READ-FUN may be `completing-read', `completing-read-multiple' or
|
||
another function with the same arguments."
|
||
`(defun ,name (&optional prompt initial-contents)
|
||
(,read-fun ,(if prompt
|
||
`(or prompt ,prompt)
|
||
'prompt)
|
||
,completions nil nil initial-contents)))
|
||
|
||
(defmacro guix-define-readers (&rest args)
|
||
"Define reader functions.
|
||
|
||
ARGS should have a form [KEYWORD VALUE] ... The following
|
||
keywords are available:
|
||
|
||
- `completions-var' - variable used to get completions.
|
||
|
||
- `completions-getter' - function used to get completions.
|
||
|
||
- `single-reader', `single-prompt' - name of a function to read
|
||
a single value, and a prompt for it.
|
||
|
||
- `multiple-reader', `multiple-prompt' - name of a function to
|
||
read multiple values, and a prompt for it.
|
||
|
||
- `multiple-separator' - if specified, another
|
||
`<multiple-reader-name>-string' function returning a string
|
||
of multiple values separated the specified separator will be
|
||
defined."
|
||
(guix-keyword-args-let args
|
||
((completions-var :completions-var)
|
||
(completions-getter :completions-getter)
|
||
(single-reader :single-reader)
|
||
(single-prompt :single-prompt)
|
||
(multiple-reader :multiple-reader)
|
||
(multiple-prompt :multiple-prompt)
|
||
(multiple-separator :multiple-separator))
|
||
(let ((completions
|
||
(cond ((and completions-var completions-getter)
|
||
`(or ,completions-var
|
||
(setq ,completions-var
|
||
(funcall ',completions-getter))))
|
||
(completions-var
|
||
completions-var)
|
||
(completions-getter
|
||
`(funcall ',completions-getter)))))
|
||
`(progn
|
||
,(when (and completions-var
|
||
(not (boundp completions-var)))
|
||
`(defvar ,completions-var nil))
|
||
|
||
,(when single-reader
|
||
`(guix-define-reader ,single-reader guix-completing-read
|
||
,completions ,single-prompt))
|
||
|
||
,(when multiple-reader
|
||
`(guix-define-reader ,multiple-reader completing-read-multiple
|
||
,completions ,multiple-prompt))
|
||
|
||
,(when (and multiple-reader multiple-separator)
|
||
(let ((name (intern (concat (symbol-name multiple-reader)
|
||
"-string"))))
|
||
`(defun ,name (&optional prompt initial-contents)
|
||
(guix-concat-strings
|
||
(,multiple-reader prompt initial-contents)
|
||
,multiple-separator))))))))
|
||
|
||
|
||
;;; Memoizing
|
||
|
||
(defun guix-memoize (function)
|
||
"Return a memoized version of FUNCTION."
|
||
(let ((cache (make-hash-table :test 'equal)))
|
||
(lambda (&rest args)
|
||
(let ((result (gethash args cache 'not-found)))
|
||
(if (eq result 'not-found)
|
||
(let ((result (apply function args)))
|
||
(puthash args result cache)
|
||
result)
|
||
result)))))
|
||
|
||
(defmacro guix-memoized-defun (name arglist docstring &rest body)
|
||
"Define a memoized function NAME.
|
||
See `defun' for the meaning of arguments."
|
||
(declare (doc-string 3) (indent 2))
|
||
`(defalias ',name
|
||
(guix-memoize (lambda ,arglist ,@body))
|
||
;; Add '(name args ...)' string with real arglist to the docstring,
|
||
;; because *Help* will display '(name &rest ARGS)' for a defined
|
||
;; function (since `guix-memoize' returns a lambda with '(&rest
|
||
;; args)').
|
||
,(format "(%S %s)\n\n%s"
|
||
name
|
||
(mapconcat #'symbol-name arglist " ")
|
||
docstring)))
|
||
|
||
(defmacro guix-memoized-defalias (symbol definition &optional docstring)
|
||
"Set SYMBOL's function definition to memoized version of DEFINITION."
|
||
(declare (doc-string 3) (indent 1))
|
||
`(defalias ',symbol
|
||
(guix-memoize #',definition)
|
||
,(or docstring
|
||
(format "Memoized version of `%S'." definition))))
|
||
|
||
|
||
(defvar guix-utils-font-lock-keywords
|
||
(eval-when-compile
|
||
`((,(rx "(" (group (or "guix-define-reader"
|
||
"guix-define-readers"
|
||
"guix-keyword-args-let"
|
||
"guix-while-null"
|
||
"guix-while-search"
|
||
"guix-with-indent"))
|
||
symbol-end)
|
||
. 1)
|
||
(,(rx "("
|
||
(group "guix-memoized-" (or "defun" "defalias"))
|
||
symbol-end
|
||
(zero-or-more blank)
|
||
(zero-or-one
|
||
(group (one-or-more (or (syntax word) (syntax symbol))))))
|
||
(1 font-lock-keyword-face)
|
||
(2 font-lock-function-name-face nil t)))))
|
||
|
||
(font-lock-add-keywords 'emacs-lisp-mode guix-utils-font-lock-keywords)
|
||
|
||
(provide 'guix-utils)
|
||
|
||
;;; guix-utils.el ends here
|