Merge branch 'master' into core-updates

10 files changed, 455 insertions, 104 deletions

diff --git a/tests/crate.scm b/tests/crate.scm
index a1dcfd5e52..a4a328d507 100644
--- a/tests/crate.scm
+++ b/tests/crate.scm
@@ -89,9 +89,9 @@
                      ('base32
                       (? string? hash)))))
          ('build-system 'cargo-build-system)
-         ('inputs
+         ('arguments
           ('quasiquote
-           (("rust-bar" ('unquote 'rust-bar) "src"))))
+           (('#:cargo-inputs (("rust-bar" ('unquote rust-bar)))))))
          ('home-page "http://example.com")
          ('synopsis "summary")
          ('description "summary")
diff --git a/tests/derivations.scm b/tests/derivations.scm
index dbb5b584eb..c421d094a4 100644
--- a/tests/derivations.scm
+++ b/tests/derivations.scm
@@ -787,6 +787,28 @@
       (build-derivations store (list drv))
       #f)))
 
+(test-assert "build-derivations with specific output"
+  (with-store store
+    (let* ((content (random-text))                ;contents of the output
+           (drv     (build-expression->derivation
+                     store "substitute-me"
+                     `(begin ,content (exit 1))   ;would fail
+                     #:outputs '("out" "one" "two")
+                     #:guile-for-build
+                     (package-derivation store %bootstrap-guile)))
+           (out     (derivation->output-path drv)))
+      (with-derivation-substitute drv content
+        (set-build-options store #:use-substitutes? #t
+                           #:substitute-urls (%test-substitute-urls))
+        (and (has-substitutes? store out)
+
+             ;; Ask for nothing but the "out" output of DRV.
+             (build-derivations store `((,drv . "out")))
+
+             (valid-path? store out)
+             (equal? (pk 'x content) (pk 'y (call-with-input-file out get-string-all)))
+             )))))
+
 (test-assert "build-expression->derivation and derivation-prerequisites-to-build"
   (let ((drv (build-expression->derivation %store "fail" #f)))
     ;; The only direct dependency is (%guile-for-build) and it's already
diff --git a/tests/guix-package.sh b/tests/guix-package.sh
index 767c3f8a66..79d6ec65e4 100644
--- a/tests/guix-package.sh
+++ b/tests/guix-package.sh
@@ -280,6 +280,20 @@ export GUIX_PACKAGE_PATH
 guix package -A emacs-foo-bar | grep 42
 guix package -i emacs-foo-bar@42 -n
 
+# Make sure GUIX_PACKAGE_PATH/'-L' takes precedence in case of duplicate packages.
+cat > "$module_dir/bar.scm"<<EOF
+(define-module (bar)
+  #:use-module (guix packages))
+
+(define-public hello
+  (package (inherit (@@ (gnu packages base) hello))
+    (synopsis "an overridden version of GNU hello")))
+EOF
+
+guix package -i hello -n 2>&1 | grep choosing.*bar.scm
+( unset GUIX_PACKAGE_PATH; \
+  guix package -i hello -n -L "$module_dir" 2>&1 | grep choosing.*bar.scm )
+
 # Make sure patches that live under $GUIX_PACKAGE_PATH are found.
 cat > "$module_dir/emacs.patch"<<EOF
 This is a fake patch.
diff --git a/tests/hackage.scm b/tests/hackage.scm
index e17851a213..38a5825af7 100644
--- a/tests/hackage.scm
+++ b/tests/hackage.scm
@@ -155,78 +155,142 @@ library
 
 (test-begin "hackage")
 
-(define* (eval-test-with-cabal test-cabal #:key (cabal-environment '()))
-  (mock
-   ((guix import hackage) hackage-fetch
-    (lambda (name-version)
-      (call-with-input-string test-cabal
-        read-cabal)))
-   (match (hackage->guix-package "foo" #:cabal-environment cabal-environment)
-     (('package
-        ('name "ghc-foo")
-        ('version "1.0.0")
-        ('source
-         ('origin
-           ('method 'url-fetch)
-           ('uri ('string-append
-                  "https://hackage.haskell.org/package/foo/foo-"
-                  'version
-                  ".tar.gz"))
-           ('sha256
-            ('base32
-             (? string? hash)))))
-        ('build-system 'haskell-build-system)
-        ('inputs
-         ('quasiquote
-          (("ghc-http" ('unquote 'ghc-http))
-           ("ghc-mtl" ('unquote 'ghc-mtl)))))
-        ('home-page "http://test.org")
-        ('synopsis (? string?))
-        ('description (? string?))
-        ('license 'bsd-3))
-      #t)
-     (x
-      (pk 'fail x #f)))))
+(define-syntax-rule (define-package-matcher name pattern)
+  (define* (name obj)
+    (match obj
+      (pattern #t)
+      (x       (pk 'fail x #f)))))
+
+(define-package-matcher match-ghc-foo
+  ('package
+    ('name "ghc-foo")
+    ('version "1.0.0")
+    ('source
+     ('origin
+       ('method 'url-fetch)
+       ('uri ('string-append
+              "https://hackage.haskell.org/package/foo/foo-"
+              'version
+              ".tar.gz"))
+       ('sha256
+        ('base32
+         (? string? hash)))))
+    ('build-system 'haskell-build-system)
+    ('inputs
+     ('quasiquote
+      (("ghc-http" ('unquote 'ghc-http)))))
+    ('home-page "http://test.org")
+    ('synopsis (? string?))
+    ('description (? string?))
+    ('license 'bsd-3)))
+
+(define* (eval-test-with-cabal test-cabal matcher #:key (cabal-environment '()))
+  (define port (open-input-string test-cabal))
+  (matcher (hackage->guix-package "foo" #:port port #:cabal-environment cabal-environment)))
 
 (test-assert "hackage->guix-package test 1"
-  (eval-test-with-cabal test-cabal-1))
+  (eval-test-with-cabal test-cabal-1 match-ghc-foo))
 
 (test-assert "hackage->guix-package test 2"
-  (eval-test-with-cabal test-cabal-2))
+  (eval-test-with-cabal test-cabal-2 match-ghc-foo))
 
 (test-assert "hackage->guix-package test 3"
-  (eval-test-with-cabal test-cabal-3
+  (eval-test-with-cabal test-cabal-3 match-ghc-foo
                         #:cabal-environment '(("impl" . "ghc-7.8"))))
 
 (test-assert "hackage->guix-package test 4"
-  (eval-test-with-cabal test-cabal-4
+  (eval-test-with-cabal test-cabal-4 match-ghc-foo
                         #:cabal-environment '(("impl" . "ghc-7.8"))))
 
 (test-assert "hackage->guix-package test 5"
-  (eval-test-with-cabal test-cabal-5
+  (eval-test-with-cabal test-cabal-5 match-ghc-foo
                         #:cabal-environment '(("impl" . "ghc-7.8"))))
 
+(define-package-matcher match-ghc-foo-6
+  ('package
+    ('name "ghc-foo")
+    ('version "1.0.0")
+    ('source
+     ('origin
+       ('method 'url-fetch)
+       ('uri ('string-append
+              "https://hackage.haskell.org/package/foo/foo-"
+              'version
+              ".tar.gz"))
+       ('sha256
+        ('base32
+         (? string? hash)))))
+    ('build-system 'haskell-build-system)
+    ('inputs
+     ('quasiquote
+      (("ghc-b" ('unquote 'ghc-b))
+       ("ghc-http" ('unquote 'ghc-http)))))
+    ('native-inputs
+     ('quasiquote
+      (("ghc-haskell-gi" ('unquote 'ghc-haskell-gi)))))
+    ('home-page "http://test.org")
+    ('synopsis (? string?))
+    ('description (? string?))
+    ('license 'bsd-3)))
+
 (test-assert "hackage->guix-package test 6"
-  (eval-test-with-cabal test-cabal-6
-                        #:cabal-environment '(("impl" . "ghc-7.8"))))
+  (eval-test-with-cabal test-cabal-6 match-ghc-foo-6))
+
+;; Check multi-line layouted description
+(define test-cabal-multiline-layout
+  "name: foo
+version: 1.0.0
+homepage: http://test.org
+synopsis: synopsis
+description:   first line
+               second line
+license: BSD3
+executable cabal
+  build-depends:
+    HTTP       >= 4000.2.5 && < 4000.3,
+    mtl        >= 2.0      && < 3
+")
+
+(test-assert "hackage->guix-package test multiline desc (layout)"
+  (eval-test-with-cabal test-cabal-multiline-layout match-ghc-foo))
+
+;; Check multi-line braced description
+(define test-cabal-multiline-braced
+  "name: foo
+version: 1.0.0
+homepage: http://test.org
+synopsis: synopsis
+description: {
+first line
+second line
+}
+license: BSD3
+executable cabal
+  build-depends:
+    HTTP       >= 4000.2.5 && < 4000.3,
+    mtl        >= 2.0      && < 3
+")
+
+(test-assert "hackage->guix-package test multiline desc (braced)"
+  (eval-test-with-cabal test-cabal-multiline-braced match-ghc-foo))
 
 (test-assert "read-cabal test 1"
   (match (call-with-input-string test-read-cabal-1 read-cabal)
     ((("name" ("test-me"))
       ('section 'library
-               (('if ('flag "base4point8")
-                    (("build-depends" ("base >= 4.8 && < 5")))
-                    (('if ('flag "base4")
-                         (("build-depends" ("base >= 4 && < 4.8")))
-                         (('if ('flag "base3")
-                              (("build-depends" ("base >= 3 && < 4")))
-                              (("build-depends" ("base < 3"))))))))
-                ('if ('or ('flag "base4point8")
-                          ('and ('flag "base4") ('flag "base3")))
-                    (("build-depends" ("random")))
-                    ())
-                ("build-depends" ("containers"))
-                ("exposed-modules" ("Test.QuickCheck.Exception")))))
+                (('if ('flag "base4point8")
+                      (("build-depends" ("base >= 4.8 && < 5")))
+                      (('if ('flag "base4")
+                            (("build-depends" ("base >= 4 && < 4.8")))
+                            (('if ('flag "base3")
+                                  (("build-depends" ("base >= 3 && < 4")))
+                                  (("build-depends" ("base < 3"))))))))
+                 ('if ('or ('flag "base4point8")
+                           ('and ('flag "base4") ('flag "base3")))
+                      (("build-depends" ("random")))
+                      ())
+                 ("build-depends" ("containers"))
+                 ("exposed-modules" ("Test.QuickCheck.Exception")))))
      #t)
     (x (pk 'fail x #f))))
 
diff --git a/tests/lzlib.scm b/tests/lzlib.scm
index cf53a9417d..543622bb45 100644
--- a/tests/lzlib.scm
+++ b/tests/lzlib.scm
@@ -108,4 +108,14 @@
 (test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB+1)"
   (compress-and-decompress (random-bytevector (1+ (* 1024 1024)))))
 
+(test-assert "make-lzip-input-port/compressed"
+  (let* ((len        (pk 'len (+ 10 (random 4000 %seed))))
+         (data       (random-bytevector len))
+         (compressed (make-lzip-input-port/compressed
+                      (open-bytevector-input-port data)))
+         (result     (call-with-lzip-input-port compressed
+                                                get-bytevector-all)))
+    (pk (bytevector-length result) (bytevector-length data))
+    (bytevector=? result data)))
+
 (test-end)
diff --git a/tests/print.scm b/tests/print.scm
index 305807c1d1..d4b2cca93f 100644
--- a/tests/print.scm
+++ b/tests/print.scm
@@ -24,9 +24,31 @@
   #:use-module (guix licenses)
   #:use-module (srfi srfi-64))
 
+(define-syntax-rule (define-with-source object source expr)
+  (begin
+    (define object expr)
+    (define source 'expr)))
+
 (test-begin "print")
 
-(define pkg
+(define-with-source pkg pkg-source
+  (package
+    (name "test")
+    (version "1.2.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "file:///tmp/test-"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "070pwb7brdcn1mfvplkd56vjc7lbz4iznzkqvfsakvgbv68k71ah"))))
+    (build-system gnu-build-system)
+    (home-page "http://gnu.org")
+    (synopsis "Dummy")
+    (description "This is a dummy package.")
+    (license gpl3+)))
+
+(define-with-source pkg-with-inputs pkg-with-inputs-source
   (package
     (name "test")
     (version "1.2.3")
@@ -38,27 +60,19 @@
                (base32
                 "070pwb7brdcn1mfvplkd56vjc7lbz4iznzkqvfsakvgbv68k71ah"))))
     (build-system gnu-build-system)
+    (inputs `(("coreutils" ,(@ (gnu packages base) coreutils))
+              ("glibc" ,(@ (gnu packages base) glibc) "debug")))
     (home-page "http://gnu.org")
     (synopsis "Dummy")
     (description "This is a dummy package.")
     (license gpl3+)))
 
 (test-equal "simple package"
-  (package->code pkg)
-  '(package
-     (name "test")
-     (version "1.2.3")
-     (source (origin
-               (method url-fetch)
-               (uri (string-append "file:///tmp/test-"
-                                   version ".tar.gz"))
-               (sha256
-                (base32
-                 "070pwb7brdcn1mfvplkd56vjc7lbz4iznzkqvfsakvgbv68k71ah"))))
-     (build-system gnu-build-system)
-     (home-page "http://gnu.org")
-     (synopsis "Dummy")
-     (description "This is a dummy package.")
-     (license gpl3+)))
+  pkg-source
+  (package->code pkg))
+
+(test-equal "package with inputs"
+  pkg-with-inputs-source
+  (package->code pkg-with-inputs))
 
 (test-end "print")
diff --git a/tests/publish.scm b/tests/publish.scm
index 097ac036e0..64a8ff3cae 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)
@@ -137,17 +138,17 @@
                   "StorePath: ~a
 URL: nar/~a
 Compression: none
+FileSize: ~a
 NarHash: sha256:~a
 NarSize: ~d
-References: ~a
-FileSize: ~a~%"
+References: ~a~%"
                   %item
                   (basename %item)
+                  (path-info-nar-size info)
                   (bytevector->nix-base32-string
                    (path-info-hash info))
                   (path-info-nar-size info)
-                  (basename (first (path-info-references info)))
-                  (path-info-nar-size info)))
+                  (basename (first (path-info-references info)))))
          (signature (base64-encode
                      (string->utf8
                       (canonical-sexp->string
@@ -169,15 +170,15 @@ FileSize: ~a~%"
                   "StorePath: ~a
 URL: nar/~a
 Compression: none
+FileSize: ~a
 NarHash: sha256:~a
 NarSize: ~d
-References: ~%\
-FileSize: ~a~%"
+References: ~%"
                   item
                   (uri-encode (basename item))
+                  (path-info-nar-size info)
                   (bytevector->nix-base32-string
                    (path-info-hash info))
-                  (path-info-nar-size info)
                   (path-info-nar-size info)))
          (signature (base64-encode
                      (string->utf8
@@ -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"
@@ -265,6 +301,35 @@ FileSize: ~a~%"
     (list (assoc-ref info "Compression")
           (dirname (assoc-ref info "URL")))))
 
+(unless (and (zlib-available?) (lzlib-available?))
+  (test-skip 1))
+(test-equal "/*.narinfo with lzip + gzip"
+  `((("StorePath" . ,%item)
+     ("URL" . ,(string-append "nar/gzip/" (basename %item)))
+     ("Compression" . "gzip")
+     ("URL" . ,(string-append "nar/lzip/" (basename %item)))
+     ("Compression" . "lzip"))
+    200
+    200)
+  (call-with-temporary-directory
+   (lambda (cache)
+     (let ((thread (with-separate-output-ports
+                    (call-with-new-thread
+                     (lambda ()
+                       (guix-publish "--port=6793" "-Cgzip:2" "-Clzip:2"))))))
+       (wait-until-ready 6793)
+       (let* ((base "http://localhost:6793/")
+              (part (store-path-hash-part %item))
+              (url  (string-append base part ".narinfo"))
+              (body (http-get-port url)))
+         (list (take (recutils->alist body) 5)
+               (response-code
+                (http-get (string-append base "nar/gzip/"
+                                         (basename %item))))
+               (response-code
+                (http-get (string-append base "nar/lzip/"
+                                         (basename %item))))))))))
+
 (test-equal "custom nar path"
   ;; Serve nars at /foo/bar/chbouib instead of /nar.
   (list `(("StorePath" . ,%item)
@@ -405,6 +470,52 @@ FileSize: ~a~%"
                          (stat:size (stat nar)))
                       (response-code uncompressed)))))))))
 
+(unless (and (zlib-available?) (lzlib-available?))
+  (test-skip 1))
+(test-equal "with cache, lzip + gzip"
+  '(200 200 404)
+  (call-with-temporary-directory
+   (lambda (cache)
+     (let ((thread (with-separate-output-ports
+                    (call-with-new-thread
+                     (lambda ()
+                       (guix-publish "--port=6794" "-Cgzip:2" "-Clzip:2"
+                                     (string-append "--cache=" cache)))))))
+       (wait-until-ready 6794)
+       (let* ((base     "http://localhost:6794/")
+              (part     (store-path-hash-part %item))
+              (url      (string-append base part ".narinfo"))
+              (nar-url  (cute string-append "nar/" <> "/"
+                              (basename %item)))
+              (cached   (cute string-append cache "/" <> "/"
+                              (basename %item) ".narinfo"))
+              (nar      (cute string-append cache "/" <> "/"
+                              (basename %item) ".nar"))
+              (response (http-get url)))
+         (wait-for-file (cached "gzip"))
+         (let* ((body         (http-get-port url))
+                (narinfo      (recutils->alist body))
+                (uncompressed (string-append base "nar/"
+                                             (basename %item))))
+           (and (file-exists? (nar "gzip"))
+                (file-exists? (nar "lzip"))
+                (equal? (take (pk 'narinfo/gzip+lzip narinfo) 7)
+                        `(("StorePath" . ,%item)
+                          ("URL" . ,(nar-url "gzip"))
+                          ("Compression" . "gzip")
+                          ("FileSize" . ,(number->string
+                                          (stat:size (stat (nar "gzip")))))
+                          ("URL" . ,(nar-url "lzip"))
+                          ("Compression" . "lzip")
+                          ("FileSize" . ,(number->string
+                                          (stat:size (stat (nar "lzip")))))))
+                (list (response-code
+                       (http-get (string-append base (nar-url "gzip"))))
+                      (response-code
+                       (http-get (string-append base (nar-url "lzip"))))
+                      (response-code
+                       (http-get uncompressed))))))))))
+
 (unless (zlib-available?)
   (test-skip 1))
 (let ((item (add-text-to-store %store "fake-compressed-thing.tar.gz"
@@ -469,6 +580,35 @@ FileSize: ~a~%"
                          (assoc-ref narinfo "FileSize"))
                         (response-code compressed))))))))))
 
+(test-equal "with cache, vanishing item"         ;<https://bugs.gnu.org/33897>
+  200
+  (call-with-temporary-directory
+   (lambda (cache)
+     (let ((thread (with-separate-output-ports
+                    (call-with-new-thread
+                     (lambda ()
+                       (guix-publish "--port=6795"
+                                     (string-append "--cache=" cache)))))))
+       (wait-until-ready 6795)
+
+       ;; Make sure that, even if ITEM disappears, we're still able to fetch
+       ;; it.
+       (let* ((base     "http://localhost:6795/")
+              (item     (add-text-to-store %store "random" (random-text)))
+              (part     (store-path-hash-part item))
+              (url      (string-append base part ".narinfo"))
+              (cached   (string-append cache
+                                       (if (zlib-available?)
+                                           "/gzip/" "/none/")
+                                       (basename item)
+                                       ".narinfo"))
+              (response (http-get url)))
+         (and (= 404 (response-code response))
+              (wait-for-file cached)
+              (begin
+                (delete-paths %store (list item))
+                (response-code (pk 'response (http-get url))))))))))
+
 (test-equal "/log/NAME"
   `(200 #t application/x-bzip2)
   (let ((drv (run-with-store %store
diff --git a/tests/store.scm b/tests/store.scm
index df66feaebb..518750d26a 100644
--- a/tests/store.scm
+++ b/tests/store.scm
@@ -599,6 +599,26 @@
              (valid-path? s o)
              (equal? c (call-with-input-file o get-string-all)))))))
 
+(test-assert "substitute + build-things with specific output"
+  (with-store s
+    (let* ((c   (random-text))                    ;contents of the output
+           (d   (build-expression->derivation
+                 s "substitute-me" `(begin ,c (exit 1)) ;would fail
+                 #:outputs '("out" "one" "two")
+                 #:guile-for-build
+                 (package-derivation s %bootstrap-guile (%current-system))))
+           (o   (derivation->output-path d)))
+      (with-derivation-substitute d c
+        (set-build-options s #:use-substitutes? #t
+                           #:substitute-urls (%test-substitute-urls))
+        (and (has-substitutes? s o)
+
+             ;; Ask for nothing but the "out" output of D.
+             (build-things s `((,(derivation-file-name d) . "out")))
+
+             (valid-path? s o)
+             (equal? c (call-with-input-file o get-string-all)))))))
+
 (test-assert "substitute, corrupt output hash"
   ;; Tweak the substituter into installing a substitute whose hash doesn't
   ;; match the one announced in the narinfo.  The daemon must notice this and
diff --git a/tests/substitute.scm b/tests/substitute.scm
index f4f2e9512d..ff2be662be 100644
--- a/tests/substitute.scm
+++ b/tests/substitute.scm
@@ -28,8 +28,10 @@
   #:use-module (guix base32)
   #:use-module ((guix store) #:select (%store-prefix))
   #:use-module ((guix ui) #:select (guix-warning-port))
+  #:use-module ((guix utils) #:select (call-with-compressed-output-port))
+  #:use-module ((guix lzlib) #:select (lzlib-available?))
   #:use-module ((guix build utils)
-                #:select (mkdir-p delete-file-recursively))
+                #:select (mkdir-p delete-file-recursively dump-port))
   #:use-module (guix tests http)
   #:use-module (rnrs bytevectors)
   #:use-module (rnrs io ports)
@@ -475,6 +477,53 @@ System: mips64el-linux\n")
                                       "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
                        "substitute-retrieved"))))
 
+(test-equal "substitute, narinfo with several URLs"
+  "Substitutable data."
+  (let ((narinfo (string-append "StorePath: " (%store-prefix)
+                                "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo
+URL: example.nar.gz
+Compression: gzip
+URL: example.nar.lz
+Compression: lzip
+URL: example.nar
+Compression: none
+NarHash: sha256:" (bytevector->nix-base32-string
+                   (sha256 (string->utf8 "Substitutable data."))) "
+NarSize: 42
+References: bar baz
+Deriver: " (%store-prefix) "/foo.drv
+System: mips64el-linux\n")))
+    (with-narinfo (string-append narinfo "Signature: "
+                                 (signature-field narinfo))
+      (dynamic-wind
+        (const #t)
+        (lambda ()
+          (define (compress input output compression)
+            (call-with-output-file output
+              (lambda (port)
+                (call-with-compressed-output-port compression port
+                  (lambda (port)
+                    (call-with-input-file input
+                      (lambda (input)
+                        (dump-port input port))))))))
+
+          (let ((nar (string-append %main-substitute-directory
+                                    "/example.nar")))
+            (compress nar (string-append nar ".gz") 'gzip)
+            (when (lzlib-available?)
+              (compress nar (string-append nar ".lz") 'lzip)))
+
+          (parameterize ((substitute-urls
+                          (list (string-append "file://"
+                                               %main-substitute-directory))))
+            (guix-substitute "--substitute"
+                             (string-append (%store-prefix)
+                                            "/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo")
+                             "substitute-retrieved"))
+          (call-with-input-file "substitute-retrieved" get-string-all))
+        (lambda ()
+          (false-if-exception (delete-file "substitute-retrieved")))))))
+
 (test-end "substitute")
 
 ;;; Local Variables:
diff --git a/tests/utils.scm b/tests/utils.scm
index 3015b21b23..44861384ab 100644
--- a/tests/utils.scm
+++ b/tests/utils.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
 ;;;
@@ -23,6 +23,7 @@
   #:use-module (guix utils)
   #:use-module ((guix store) #:select (%store-prefix store-path-package-name))
   #:use-module ((guix search-paths) #:select (string-tokenize*))
+  #:use-module ((guix lzlib) #:select (lzlib-available?))
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-11)
   #:use-module (srfi srfi-64)
@@ -174,30 +175,47 @@
       (any (compose (negate zero?) cdr waitpid)
            pids))))
 
-(test-assert "compressed-port, decompressed-port, non-file"
-  (let ((data (call-with-input-file (search-path %load-path "guix.scm")
-                get-bytevector-all)))
-    (let*-values (((compressed pids1)
-                   (compressed-port 'xz (open-bytevector-input-port data)))
-                  ((decompressed pids2)
-                   (decompressed-port 'xz compressed)))
-      (and (every (compose zero? cdr waitpid)
-                  (append pids1 pids2))
-           (equal? (get-bytevector-all decompressed) data)))))
-
-(false-if-exception (delete-file temp-file))
-(test-assert "compressed-output-port + decompressed-port"
-  (let* ((file (search-path %load-path "guix/derivations.scm"))
-         (data (call-with-input-file file get-bytevector-all))
-         (port (open-file temp-file "w0b")))
-    (call-with-compressed-output-port 'xz port
-      (lambda (compressed)
-        (put-bytevector compressed data)))
-    (close-port port)
-
-    (bytevector=? data
-                  (call-with-decompressed-port 'xz (open-file temp-file "r0b")
-                    get-bytevector-all))))
+(define (test-compression/decompression method run?)
+  "Test METHOD, a symbol such as 'gzip.  Call RUN? to determine whether to
+skip these tests."
+  (unless (run?) (test-skip 1))
+  (test-assert (format #f "compressed-port, decompressed-port, non-file [~a]"
+                       method)
+    (let ((data (call-with-input-file (search-path %load-path "guix.scm")
+                  get-bytevector-all)))
+      (let*-values (((compressed pids1)
+                     (compressed-port method (open-bytevector-input-port data)))
+                    ((decompressed pids2)
+                     (decompressed-port method compressed)))
+        (and (every (compose zero? cdr waitpid)
+                    (pk 'pids method (append pids1 pids2)))
+             (let ((result (get-bytevector-all decompressed)))
+               (pk 'len method
+                   (if (bytevector? result)
+                       (bytevector-length result)
+                       result)
+                   (bytevector-length data))
+               (equal? result data))))))
+
+  (false-if-exception (delete-file temp-file))
+  (unless (run?) (test-skip 1))
+  (test-assert (format #f "compressed-output-port + decompressed-port [~a]"
+                       method)
+    (let* ((file (search-path %load-path "guix/derivations.scm"))
+           (data (call-with-input-file file get-bytevector-all))
+           (port (open-file temp-file "w0b")))
+      (call-with-compressed-output-port method port
+        (lambda (compressed)
+          (put-bytevector compressed data)))
+      (close-port port)
+
+      (bytevector=? data
+                    (call-with-decompressed-port method (open-file temp-file "r0b")
+                      get-bytevector-all)))))
+
+(for-each test-compression/decompression
+          '(gzip xz lzip)
+          (list (const #t) (const #t) lzlib-available?))
 
 ;; This is actually in (guix store).
 (test-equal "store-path-package-name"