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chromium-extension: Simplify builder code.

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* gnu/build/chromium-extension.scm (chromium-json->profile-object): Remove
variable.
(file-sha256): New variable.
(make-chromium-extension): Rename OUTPUT parameter to prevent conflict.
Adjust other variable names for clarity.
[inputs]: Clear.
[arguments]: Inline and simplify the final transformation with a gexp.
This commit is contained in:
Marius Bakke 2021-12-15 23:06:46 +01:00
parent fdd71babc7
commit f59bb27557
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GPG key ID: A2A06DF2A33A54FA
1 changed files with 37 additions and 56 deletions
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93
gnu/build/chromium-extension.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Marius Bakke <marius@gnu.org>
;;; Copyright © 2020, 2021 Marius Bakke <marius@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -127,66 +127,47 @@ (define (signing-key->public-der key)
"--outder")
#:local-build? #t))
(define (chromium-json->profile-object json signing-key)
"Return a derivation that installs JSON to the directory searched by
Chromium, using a file name (aka extension ID) derived from SIGNING-KEY."
(define der (signing-key->public-der signing-key))
(define (file-sha256sum file)
(with-extensions (list guile-gcrypt)
(with-imported-modules '((guix build utils))
(computed-file
"chromium-extension"
#~(begin
(use-modules (guix build utils)
(gcrypt base16)
(gcrypt hash))
(define (base16-string->chromium-base16 str)
;; Translate STR, a hexadecimal string, to a Chromium-style
;; representation using the letters a-p (where a=0, p=15).
(define s1 "0123456789abcdef")
(define s2 "abcdefghijklmnop")
(let loop ((chars (string->list str))
(converted '()))
(if (null? chars)
(list->string (reverse converted))
(loop (cdr chars)
(cons (string-ref s2 (string-index s1 (car chars)))
converted)))))
#~(begin
(use-modules (gcrypt base16) (gcrypt hash))
(bytevector->base16-string (file-sha256 #$file)))))
(let* ((checksum (bytevector->base16-string (file-sha256 #$der)))
(file-name (base16-string->chromium-base16
(string-take checksum 32)))
(extension-directory (string-append #$output
"/share/chromium/extensions")))
(mkdir-p extension-directory)
(symlink #$json (string-append extension-directory "/"
file-name ".json"))))
#:local-build? #t))))
(define* (make-chromium-extension p #:optional (output "out"))
"Create a Chromium extension from package P and return a package that,
when installed, will make the extension contained in P available as a
Chromium browser extension. OUTPUT specifies which output of P to use."
(let* ((pname (package-name p))
(version (package-version p))
(signing-key (make-signing-key pname)))
(define* (make-chromium-extension pkg #:optional (pkg-output "out"))
"Create a Chromium extension from package PKG and return a package that,
when installed, will make the extension contained in PKG available as a
Chromium browser extension. PKG-OUTPUT specifies which output of PKG to use."
(let* ((name (package-name pkg))
(version (package-version pkg))
(private-key (make-signing-key name))
(public-key (signing-key->public-der private-key))
(checksum (file-sha256sum public-key))
(crx (make-crx private-key pkg pkg-output))
(json (crx->chromium-json crx version)))
(package
(inherit p)
(name (string-append pname "-chromium"))
(inherit pkg)
(name (string-append name "-chromium"))
(source #f)
(build-system trivial-build-system)
(native-inputs '())
(inputs
`(("extension" ,(chromium-json->profile-object
(crx->chromium-json (make-crx signing-key p output)
version)
signing-key))))
(inputs '())
(propagated-inputs '())
(outputs '("out"))
(build-system trivial-build-system)
(arguments
'(#:modules ((guix build utils))
#:builder
(begin
(use-modules (guix build utils))
(copy-recursively (assoc-ref %build-inputs "extension")
(assoc-ref %outputs "out"))))))))
(list #:modules '((guix build utils))
#:builder
#~(begin
(use-modules (guix build utils))
(define (base16-char->chromium-base16 char)
;; Translate CHAR, a hexadecimal character, to a Chromium-style
;; representation using the letters a-p (where a=0, p=15).
(string-ref "abcdefghijklmnop"
(string-index "0123456789abcdef" char)))
(let ((file-name (string-map base16-char->chromium-base16
(string-take #$checksum 32)))
(extension-directory
(string-append #$output
"/share/chromium/extensions")))
(mkdir-p extension-directory)
(symlink #$json (string-append extension-directory "/"
file-name ".json")))))))))