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authorRicardo Wurmus <rekado@elephly.net>2017-08-27 17:41:18 +0200
committerRicardo Wurmus <rekado@elephly.net>2017-09-28 13:10:11 +0200
commitfb1db385476bc4548d3eadea93b5dd6a346839f2 (patch)
tree6c505efc758fc6ecc15c567a906d353d5ef1adb5
parent5e892bc365a3da0d30a0982783ee2ab82ee090f8 (diff)
downloadguix-fb1db385476bc4548d3eadea93b5dd6a346839f2.tar.gz
guix-fb1db385476bc4548d3eadea93b5dd6a346839f2.zip
import: Add JSON importer.
* doc/guix.texi (Invoking guix import): Document it. * guix/scripts/import/json.scm: New file. * Makefile.am (MODULES): Add it. * guix/scripts/import.scm (importers): Add json importer.
-rw-r--r--Makefile.am1
-rw-r--r--doc/guix.texi50
-rw-r--r--guix/scripts/build.scm18
-rw-r--r--guix/scripts/import.scm2
-rw-r--r--guix/scripts/import/json.scm102
5 files changed, 171 insertions, 2 deletions
diff --git a/Makefile.am b/Makefile.am
index e16f15acef..1f014b7c01 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -174,6 +174,7 @@ MODULES = \
guix/scripts/import/gnu.scm \
guix/scripts/import/nix.scm \
guix/scripts/import/hackage.scm \
+ guix/scripts/import/json.scm \
guix/scripts/import/elpa.scm \
guix/scripts/import/texlive.scm \
guix/scripts/environment.scm \
diff --git a/doc/guix.texi b/doc/guix.texi
index 5a32476bd3..dd0a46a638 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5899,6 +5899,56 @@ CTAN while fetching the sources from the directory
guix import texlive --archive=generic ifxetex
@end example
+@item json
+@cindex JSON, import
+Import package metadata from a local JSON file@footnote{This
+functionality requires Guile-JSON to be installed.
+@xref{Requirements}.}. Consider the following example package
+definition in JSON format:
+
+@example
+@{
+ "name": "hello",
+ "version": "2.10",
+ "source": "mirror://gnu/hello/hello-2.10.tar.gz",
+ "build-system": "gnu",
+ "home-page": "https://www.gnu.org/software/hello/",
+ "synopsis": "Hello, GNU world: An example GNU package",
+ "description": "GNU Hello prints a greeting.",
+ "license": "GPL-3.0+",
+ "native-inputs": ["gcc@@6"]
+@}
+@end example
+
+The field names are the same as for the @code{<package>} record
+(@xref{Defining Packages}). References to other packages are provided
+as JSON lists of quoted package specification strings such as
+@code{guile} or @code{guile@@2.0}.
+
+The importer also supports a more explicit source definition using the
+common fields for @code{<origin>} records:
+
+@example
+@{
+ @dots{}
+ "source": @{
+ "method": "url-fetch",
+ "uri": "mirror://gnu/hello/hello-2.10.tar.gz",
+ "sha256": @{
+ "base32": "0ssi1wpaf7plaswqqjwigppsg5fyh99vdlb9kzl7c9lng89ndq1i"
+ @}
+ @}
+ @dots{}
+@}
+@end example
+
+The command below reads metadata from the JSON file @code{hello.json}
+and outputs a package expression:
+
+@example
+guix import json hello.json
+@end example
+
@item nix
Import metadata from a local copy of the source of the
@uref{http://nixos.org/nixpkgs/, Nixpkgs distribution}@footnote{This
diff --git a/guix/scripts/build.scm b/guix/scripts/build.scm
index 0571b874f1..3cc679c70a 100644
--- a/guix/scripts/build.scm
+++ b/guix/scripts/build.scm
@@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -31,9 +32,11 @@
#:use-module (guix monads)
#:use-module (guix gexp)
+ #:autoload (json) (json-string->scm)
#:autoload (guix http-client) (http-fetch http-get-error?)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
+ #:use-module (ice-9 rdelim)
#:use-module (ice-9 vlist)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
@@ -55,6 +58,10 @@
register-root
register-root*))
+;; Lazy reference to import utils to avoid cycle
+(define (lazy-util sym)
+ (module-ref (resolve-interface '(guix import utils)) sym))
+
(define %default-log-urls
;; Default base URLs for build logs.
'("http://hydra.gnu.org/log"))
@@ -606,7 +613,16 @@ build---packages, gexps, derivations, and so on."
(else
(list (specification->package spec)))))
(('file . file)
- (ensure-list (load* file (make-user-module '()))))
+ (if (string-suffix? ".json" file)
+ (begin
+ ;; Load (json) lazily to avoid hard dependency.
+ ;; TODO: doesn't work
+ (let* ((json (json-string->scm
+ (with-input-from-file file read-string)))
+ (pkg ((lazy-util 'data->guix-package)
+ ((lazy-util 'hash-table->alist) json))))
+ (ensure-list pkg)))
+ (ensure-list (load* file (make-user-module '())))))
(('expression . str)
(ensure-list (read/eval str)))
(('argument . (? derivation? drv))
diff --git a/guix/scripts/import.scm b/guix/scripts/import.scm
index 9bba074e8c..67bc7a7553 100644
--- a/guix/scripts/import.scm
+++ b/guix/scripts/import.scm
@@ -74,7 +74,7 @@ rather than \\n."
;;;
(define importers '("gnu" "nix" "pypi" "cpan" "hackage" "stackage" "elpa" "gem"
- "cran" "crate" "texlive"))
+ "cran" "crate" "texlive" "json"))
(define (resolve-importer name)
(let ((module (resolve-interface
diff --git a/guix/scripts/import/json.scm b/guix/scripts/import/json.scm
new file mode 100644
index 0000000000..8771e7b0eb
--- /dev/null
+++ b/guix/scripts/import/json.scm
@@ -0,0 +1,102 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
+;;; Copyright © 2015, 2017 Ricardo Wurmus <rekado@elephly.net>
+;;;
+;;; 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix scripts import json)
+ #:use-module (json)
+ #:use-module (guix ui)
+ #:use-module (guix utils)
+ #:use-module (guix scripts)
+ #:use-module (guix import utils)
+ #:use-module (guix import print)
+ #:use-module (guix scripts import)
+ #:use-module (guix packages)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (srfi srfi-11)
+ #:use-module (srfi srfi-37)
+ #:use-module (srfi srfi-41)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 rdelim)
+ #:use-module (ice-9 format)
+ #:export (guix-import-json))
+
+
+;;;
+;;; Command-line options.
+;;;
+
+(define %default-options
+ '())
+
+(define (show-help)
+ (display (G_ "Usage: guix import json PACKAGE-FILE
+Import and convert the JSON package definition in PACKAGE-FILE.\n"))
+ (display (G_ "
+ -h, --help display this help and exit"))
+ (display (G_ "
+ -V, --version display version information and exit"))
+ (newline)
+ (show-bug-report-information))
+
+(define %options
+ ;; Specification of the command-line options.
+ (cons* (option '(#\h "help") #f #f
+ (lambda args
+ (show-help)
+ (exit 0)))
+ (option '(#\V "version") #f #f
+ (lambda args
+ (show-version-and-exit "guix import json")))
+ %standard-import-options))
+
+
+;;;
+;;; Entry point.
+;;;
+
+(define (guix-import-json . args)
+ (define (parse-options)
+ ;; Return the alist of option values.
+ (args-fold* args %options
+ (lambda (opt name arg result)
+ (leave (G_ "~A: unrecognized option~%") name))
+ (lambda (arg result)
+ (alist-cons 'argument arg result))
+ %default-options))
+
+ (let* ((opts (parse-options))
+ (args (filter-map (match-lambda
+ (('argument . value)
+ value)
+ (_ #f))
+ (reverse opts))))
+ (match args
+ ((file-name)
+ (catch 'json-invalid
+ (lambda ()
+ (let ((json (json-string->scm
+ (with-input-from-file file-name read-string))))
+ ;; TODO: also print define-module boilerplate
+ (package->code (alist->package (hash-table->alist json)))))
+ (lambda _
+ (leave (G_ "invalid JSON in file '~a'~%") file-name))))
+ (()
+ (leave (G_ "too few arguments~%")))
+ ((many ...)
+ (leave (G_ "too many arguments~%"))))))