1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;;
;;; 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 publish)
#:use-module ((system repl server) #:prefix repl:)
#:use-module (ice-9 binary-ports)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (rnrs io ports)
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-2)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:use-module (web http)
#:use-module (web request)
#:use-module (web response)
#:use-module (web server)
#:use-module (web uri)
#:use-module (guix base32)
#:use-module (guix base64)
#:use-module (guix config)
#:use-module (guix derivations)
#:use-module (guix hash)
#:use-module (guix pki)
#:use-module (guix pk-crypto)
#:use-module (guix store)
#:use-module (guix serialization)
#:use-module (guix ui)
#:export (guix-publish))
(define (show-help)
(format #t (_ "Usage: guix publish [OPTION]...
Publish ~a over HTTP.\n") %store-directory)
(display (_ "
-p, --port=PORT listen on PORT"))
(display (_ "
-r, --repl[=PORT] spawn REPL server on PORT"))
(newline)
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
(list (option '(#\h "help") #f #f
(lambda _
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda _
(show-version-and-exit "guix publish")))
(option '(#\p "port") #t #f
(lambda (opt name arg result)
(alist-cons 'port (string->number* arg) result)))
(option '(#\r "repl") #f #t
(lambda (opt name arg result)
;; If port unspecified, use default Guile REPL port.
(let ((port (and arg (string->number* arg))))
(alist-cons 'repl (or port 37146) result))))))
(define %default-options
'((port . 8080)
(repl . #f)))
(define (lazy-read-file-sexp file)
"Return a promise to read the canonical sexp from FILE."
(delay
(call-with-input-file file
(compose string->canonical-sexp
get-string-all))))
(define %private-key
(lazy-read-file-sexp %private-key-file))
(define %public-key
(lazy-read-file-sexp %public-key-file))
(define %nix-cache-info
`(("StoreDir" . ,%store-directory)
("WantMassQuery" . 0)
("Priority" . 100)))
(define (load-derivation file)
"Read the derivation from FILE."
(call-with-input-file file read-derivation))
(define (signed-string s)
"Sign the hash of the string S with the daemon's key."
(let* ((public-key (force %public-key))
(hash (bytevector->hash-data (sha256 (string->utf8 s))
#:key-type (key-type public-key))))
(signature-sexp hash (force %private-key) public-key)))
(define base64-encode-string
(compose base64-encode string->utf8))
(define (narinfo-string store-path path-info key)
"Generate a narinfo key/value string for STORE-PATH using the details in
PATH-INFO. The narinfo is signed with KEY."
(let* ((url (string-append "nar/" (basename store-path)))
(hash (bytevector->base32-string
(path-info-hash path-info)))
(size (path-info-nar-size path-info))
(references (string-join
(map basename (path-info-references path-info))
" "))
(deriver (path-info-deriver path-info))
(base-info (format #f
"StorePath: ~a
URL: ~a
Compression: none
NarHash: sha256:~a
NarSize: ~d
References: ~a~%"
store-path url hash size references))
;; Do not render a "Deriver" or "System" line if we are rendering
;; info for a derivation.
(info (if (string-null? deriver)
base-info
(let ((drv (load-derivation deriver)))
(format #f "~aSystem: ~a~%Deriver: ~a~%"
base-info (derivation-system drv)
(basename deriver)))))
(signature (base64-encode-string
(canonical-sexp->string (signed-string info)))))
(format #f "~aSignature: 1;~a;~a~%" info (gethostname) signature)))
(define (not-found request)
"Render 404 response for REQUEST."
(values (build-response #:code 404)
(string-append "Resource not found: "
(uri-path (request-uri request)))))
(define (render-nix-cache-info)
"Render server information."
(values '((content-type . (text/plain)))
(lambda (port)
(for-each (match-lambda
((key . value)
(format port "~a: ~a~%" key value)))
%nix-cache-info))))
(define (render-narinfo store request hash)
"Render metadata for the store path corresponding to HASH."
(let* ((store-path (hash-part->path store hash))
(path-info (and (not (string-null? store-path))
(query-path-info store store-path))))
(if path-info
(values '((content-type . (application/x-nix-narinfo)))
(cut display
(narinfo-string store-path path-info (force %private-key))
<>))
(not-found request))))
(define (render-nar request store-item)
"Render archive of the store path corresponding to STORE-ITEM."
(let ((store-path (string-append %store-directory "/" store-item)))
;; The ISO-8859-1 charset *must* be used otherwise HTTP clients will
;; interpret the byte stream as UTF-8 and arbitrarily change invalid byte
;; sequences.
(if (file-exists? store-path)
(values '((content-type . (application/x-nix-archive
(charset . "ISO-8859-1"))))
(lambda (port)
(write-file store-path port)))
(not-found request))))
(define extract-narinfo-hash
(let ((regexp (make-regexp "^([a-df-np-sv-z0-9]{32}).narinfo$")))
(lambda (str)
"Return the hash within the narinfo resource string STR, or false if STR
is invalid."
(and=> (regexp-exec regexp str)
(cut match:substring <> 1)))))
(define (get-request? request)
"Return #t if REQUEST uses the GET method."
(eq? (request-method request) 'GET))
(define (request-path-components request)
"Split the URI path of REQUEST into a list of component strings. For
example: \"/foo/bar\" yields '(\"foo\" \"bar\")."
(split-and-decode-uri-path (uri-path (request-uri request))))
(define (make-request-handler store)
(lambda (request body)
(format #t "~a ~a~%"
(request-method request)
(uri-path (request-uri request)))
(if (get-request? request) ; reject POST, PUT, etc.
(match (request-path-components request)
;; /nix-cache-info
(("nix-cache-info")
(render-nix-cache-info))
;; /<hash>.narinfo
(((= extract-narinfo-hash (? string? hash)))
(render-narinfo store request hash))
;; /nar/<store-item>
(("nar" store-item)
(render-nar request store-item))
(_ (not-found request)))
(not-found request))))
(define (run-publish-server port store)
(run-server (make-request-handler store)
'http
`(#:addr ,INADDR_ANY
#:port ,port)))
(define (guix-publish . args)
(with-error-handling
(let* ((opts (args-fold* args %options
(lambda (opt name arg result)
(leave (_ "~A: unrecognized option~%") name))
(lambda (arg result)
(leave (_ "~A: extraneuous argument~%") arg))
%default-options))
(port (assoc-ref opts 'port))
(repl-port (assoc-ref opts 'repl)))
(format #t (_ "publishing ~a on port ~d~%") %store-directory port)
(when repl-port
(repl:spawn-server (repl:make-tcp-server-socket #:port repl-port)))
(with-store store
(run-publish-server (assoc-ref opts 'port) store)))))
|