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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
;;; Copyright © 2021 Andrew Tropin <andrew@trop.in>
;;;
;;; 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 home import)
#:use-module (guix profiles)
#:use-module (guix ui)
#:use-module (guix utils)
#:use-module (guix packages)
#:use-module (gnu packages)
#:use-module (ice-9 match)
#:use-module (ice-9 pretty-print)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (import-manifest
;; For tests.
manifest->code))
;;; Commentary:
;;;
;;; This module provides utilities for generating home service
;;; configurations from existing "dotfiles".
;;;
;;; Code:
(define (generate-bash-configuration+modules destination-directory)
(define (destination-append path)
(string-append destination-directory "/" path))
(let ((rc (destination-append ".bashrc"))
(profile (destination-append ".bash_profile"))
(logout (destination-append ".bash_logout")))
`((service home-bash-service-type
(home-bash-configuration
,@(if (file-exists? rc)
`((bashrc
(list (local-file ,rc))))
'())
,@(if (file-exists? profile)
`((bash-profile
(list (local-file ,profile))))
'())
,@(if (file-exists? logout)
`((bash-logout
(list (local-file ,logout))))
'())))
(guix gexp)
(gnu home services shells))))
(define %files+configurations-alist
`((".bashrc" . ,generate-bash-configuration+modules)
(".bash_profile" . ,generate-bash-configuration+modules)
(".bash_logout" . ,generate-bash-configuration+modules)))
(define (configurations+modules destination-directory)
"Return a list of procedures which when called, generate code for a home
service declaration."
(define configurations
(delete-duplicates
(filter-map (match-lambda
((file . proc)
(let ((absolute-path (string-append (getenv "HOME")
"/" file)))
(and (file-exists? absolute-path)
(begin
(copy-file absolute-path
(string-append
destination-directory "/" file))
proc)))))
%files+configurations-alist)
(lambda (x y)
(equal? (procedure-name x) (procedure-name y)))))
(map (lambda (proc) (proc destination-directory)) configurations))
;; Based on `manifest->code' from (guix profiles)
;; MAYBE: Upstream it?
(define* (manifest->code manifest destination-directory
#:key
(entry-package-version (const ""))
(home-environment? #f))
"Return an sexp representing code to build an approximate version of
MANIFEST; the code is wrapped in a top-level 'begin' form. If
HOME-ENVIRONMENT? is #t, return an <home-environment> definition.
Call ENTRY-PACKAGE-VERSION to determine the version number to use in
the spec for a given entry; it can be set to 'manifest-entry-version'
for fully-specified version numbers, or to some other procedure to
disambiguate versions for packages for which several versions are
available."
(define (entry-transformations entry)
;; Return the transformations that apply to ENTRY.
(assoc-ref (manifest-entry-properties entry) 'transformations))
(define transformation-procedures
;; List of transformation options/procedure name pairs.
(let loop ((entries (manifest-entries manifest))
(counter 1)
(result '()))
(match entries
(() result)
((entry . tail)
(match (entry-transformations entry)
(#f
(loop tail counter result))
(options
(if (assoc-ref result options)
(loop tail counter result)
(loop tail (+ 1 counter)
(alist-cons options
(string->symbol
(format #f "transform~a" counter))
result)))))))))
(define (qualified-name entry)
;; Return the name of ENTRY possibly with "@" followed by a version.
(match (entry-package-version entry)
("" (manifest-entry-name entry))
(version (string-append (manifest-entry-name entry)
"@" version))))
(if (null? transformation-procedures)
(let ((specs (map (lambda (entry)
(match (manifest-entry-output entry)
("out" (qualified-name entry))
(output (string-append (qualified-name entry)
":" output))))
(manifest-entries manifest))))
(if home-environment?
(let ((configurations+modules
(configurations+modules destination-directory)))
`(begin
(use-modules (gnu home)
(gnu packages)
(gnu services)
,@((compose delete-duplicates concatenate)
(map cdr configurations+modules)))
,(home-environment-template
#:specs specs
#:services (map first configurations+modules))))
`(begin
(use-modules (gnu packages))
(specifications->manifest
(list ,@specs)))))
(let* ((transform (lambda (options exp)
(if (not options)
exp
(let ((proc (assoc-ref transformation-procedures
options)))
`(,proc ,exp)))))
(packages (map (lambda (entry)
(define options
(entry-transformations entry))
(define name
(qualified-name entry))
(match (manifest-entry-output entry)
("out"
(transform options
`(specification->package ,name)))
(output
`(list ,(transform
options
`(specification->package ,name))
,output))))
(manifest-entries manifest)))
(transformations (map (match-lambda
((options . name)
`(define ,name
(options->transformation ',options))))
transformation-procedures)))
(if home-environment?
(let ((configurations+modules
(configurations+modules destination-directory)))
`(begin
(use-modules (guix transformations)
(gnu home)
(gnu packages)
(gnu services)
,@((compose delete-duplicates concatenate)
(map cdr configurations+modules)))
,@transformations
,(home-environment-template
#:packages packages
#:services (map first configurations+modules))))
`(begin
(use-modules (guix transformations)
(gnu packages))
,@transformations
(packages->manifest
(list ,@packages)))))))
(define* (home-environment-template #:key (packages #f) (specs #f) services)
"Return an S-exp containing a <home-environment> declaration
containing PACKAGES, or SPECS (package specifications), and SERVICES."
`(home-environment
(packages
,@(if packages
`((list ,@packages))
`((map specification->package
(list ,@specs)))))
(services (list ,@services))))
(define* (import-manifest
manifest destination-directory
#:optional (port (current-output-port)))
"Write to PORT a <home-environment> corresponding to MANIFEST."
(define (version-spec entry)
(let ((name (manifest-entry-name entry)))
(match (map package-version (find-packages-by-name name))
((_)
;; A single version of NAME is available, so do not specify the
;; version number, even if the available version doesn't match ENTRY.
"")
(versions
;; If ENTRY uses the latest version, don't specify any version.
;; Otherwise return the shortest unique version prefix. Note that
;; this is based on the currently available packages, which could
;; differ from the packages available in the revision that was used
;; to build MANIFEST.
(let ((current (manifest-entry-version entry)))
(if (every (cut version>? current <>)
(delete current versions))
""
(version-unique-prefix (manifest-entry-version entry)
versions)))))))
(match (manifest->code manifest destination-directory
#:entry-package-version version-spec
#:home-environment? #t)
(('begin exp ...)
(format port (G_ "\
;; This \"home-environment\" file can be passed to 'guix home reconfigure'
;; to reproduce the content of your profile. This is \"symbolic\": it only
;; specifies package names. To reproduce the exact same profile, you also
;; need to capture the channels being used, as returned by \"guix describe\".
;; See the \"Replicating Guix\" section in the manual.\n"))
(for-each (lambda (exp)
(newline port)
(pretty-print exp port))
exp))))
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