publish: Add support for lzip.

* guix/scripts/publish.scm (show-help, %options): Support '-C METHOD'
and '-C METHOD:LEVEL'.
(default-compression): New procedure.
(bake-narinfo+nar): Add lzip.
(nar-response-port): Likewise.
(string->compression-type): New procedure.
(make-request-handler): Generalize /nar/gzip handler to handle /nar/lzip
as well.
* tests/publish.scm ("/nar/lzip/*"): New test.
("/*.narinfo with lzip compression"): New test.
* doc/guix.texi (Invoking guix publish): Document it.
(Requirements): Mention lzlib.

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/publish.scm b/tests/publish.scm
index 7f44bc700f..80e0977cd5 100644
--- a/tests/publish.scm
+++ b/tests/publish.scm
@@ -36,6 +36,7 @@
   #:use-module (gcrypt pk-crypto)
   #:use-module ((guix pki) #:select (%public-key-file %private-key-file))
   #:use-module (guix zlib)
+  #:use-module (guix lzlib)
   #:use-module (web uri)
   #:use-module (web client)
   #:use-module (web response)
@@ -229,6 +230,19 @@ FileSize: ~a~%"
                (string-append "/nar/gzip/" (basename %item))))))
     (get-bytevector-n nar (bytevector-length %gzip-magic-bytes))))
 
+(unless (lzlib-available?)
+  (test-skip 1))
+(test-equal "/nar/lzip/*"
+  "bar"
+  (call-with-temporary-output-file
+   (lambda (temp port)
+     (let ((nar (http-get-port
+                 (publish-uri
+                  (string-append "/nar/lzip/" (basename %item))))))
+       (call-with-lzip-input-port nar
+         (cut restore-file <> temp)))
+     (call-with-input-file temp read-string))))
+
 (unless (zlib-available?)
   (test-skip 1))
 (test-equal "/*.narinfo with compression"
@@ -251,6 +265,28 @@ FileSize: ~a~%"
                   (_ #f)))
               (recutils->alist body)))))
 
+(unless (lzlib-available?)
+  (test-skip 1))
+(test-equal "/*.narinfo with lzip compression"
+  `(("StorePath" . ,%item)
+    ("URL" . ,(string-append "nar/lzip/" (basename %item)))
+    ("Compression" . "lzip"))
+  (let ((thread (with-separate-output-ports
+                 (call-with-new-thread
+                  (lambda ()
+                    (guix-publish "--port=6790" "-Clzip"))))))
+    (wait-until-ready 6790)
+    (let* ((url  (string-append "http://localhost:6790/"
+                                (store-path-hash-part %item) ".narinfo"))
+           (body (http-get-port url)))
+      (filter (lambda (item)
+                (match item
+                  (("Compression" . _) #t)
+                  (("StorePath" . _)  #t)
+                  (("URL" . _) #t)
+                  (_ #f)))
+              (recutils->alist body)))))
+
 (unless (zlib-available?)
   (test-skip 1))
 (test-equal "/*.narinfo for a compressed file"