import: Add hex.pm importer.

hex.pm is a package repository for Erlang and Elixir.

* guix/scripts/import.scm (importers): Add "hexpm".
* guix/scripts/import/hexpm.scm, guix/import/hexpm.scm,
  guix/hexpm-download.scm: New files.
* guix/import/utils.scm (source-spec->object): Add "hexpm-fetch" to list of
  fetch methods.
* guix/upstream.scm (package-update/hexpm-fetch): New function.
  (%method-updates) Add it.
* Makefile.am: Add them.

1 files changed, 253 insertions, 0 deletions

diff --git a/tests/hexpm.scm b/tests/hexpm.scm
new file mode 100644
index 0000000000..e9f899f166
--- /dev/null
+++ b/tests/hexpm.scm
@@ -0,0 +1,253 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Hartmut Goebel <h.goebel@crazy-compilers.com>
+;;;
+;;; 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 (test-hexpm)
+  #:use-module (guix import hexpm)
+  #:use-module (guix base32)
+  #:use-module (gcrypt hash)
+  #:use-module (guix tests)
+  #:use-module (srfi srfi-64)
+  #:use-module (ice-9 binary-ports)
+  #:use-module (ice-9 match))
+
+(define test-bla-package
+  "{\"name\": \"bla\",
+    \"html_url\": \"https://hex.pm/packages/bla\",
+    \"docs_html_url\": null,
+    \"meta\": {
+        \"description\": \"A cool package\",
+        \"licenses\": [\"MIT\", \"Apache-2.0\"]
+    },
+    \"releases\": [
+        {\"url\": \"https://hex.pm/api/packages/bla/releases/1.5.0\",
+         \"version\": \"1.5.0\"},
+        {\"url\": \"https://hex.pm/api/packages/bla/releases/1.4.7\",
+         \"version\": \"1.4.7\"}
+    ]
+}")
+
+(define test-bla-release
+  "{
+   \"version\": \"1.5.0\",
+   \"url\": \"https://hex.pm/api/packages/bla/releases/1.5.0\",
+   \"requirements\": {
+     \"blubb\":{\"app\": \"blubb\",
+        \"optional\": false,
+        \"requirement\": \"~>0.3\"
+         },
+     \"fasel\":{\"app\": \"fasel\",
+        \"optional\": false,
+        \"requirement\": \"~>1.0\"
+         }
+   },
+   \"meta\":{ \"build_tools\":[\"mix\", \"make\", \"rebar3\"] }
+ }")
+
+(define test-blubb-package
+  "{\"name\": \"blubb\",
+    \"latest_stable_version\": \"0.3.1\",
+    \"latest_version\": \"0.3.1\",
+    \"html_url\": \"https://hex.pm/packages/blubb\",
+    \"docs_html_url\": null,
+    \"meta\": {
+        \"description\": \"Another cool package\",
+        \"licenses\": [\"MIT\"]
+    },
+    \"releases\": [
+        {\"url\": \"https://hex.pm/api/packages/blubb/releases/0.3.1\",
+         \"version\": \"0.3.1\"},
+        {\"url\": \"https://hex.pm/api/packages/blubb/releases/0.3.0\",
+         \"version\": \"0.3.0\"}
+    ]
+}")
+
+(define test-blubb-release
+  "{
+   \"version\": \"0.3.1\",
+   \"url\": \"https://hex.pm/api/packages/blubb/releases/0.3.1\",
+   \"requirements\": {
+     \"fasel\":{\"app\": \"fasel\",
+        \"optional\": false,
+        \"requirement\": \"~>1.0\"
+         }
+   },
+   \"meta\": { \"build_tools\":[\"mix\"] }
+ }")
+
+(define test-fasel-package
+  "{\"name\": \"fasel\",
+    \"latest_stable_version\": \"1.2.1\",
+    \"latest_version\": \"1.2.1\",
+    \"html_url\": \"https://hex.pm/packages/fasel\",
+    \"docs_html_url\": null,
+    \"meta\": {
+        \"description\": \"Yet another cool package\",
+        \"licenses\": [\"GPL\"]
+    },
+    \"releases\": [
+        {\"url\": \"https://hex.pm/api/packages/fasel/releases/1.2.1\",
+         \"version\": \"1.2.1\"}
+    ]
+}")
+
+(define test-fasel-release
+  "{
+   \"version\": \"1.2.1\",
+   \"url\": \"https://hex.pm/api/packages/fasel/releases/1.2.1\",
+   \"requirements\" :{},
+   \"meta\":{ \"build_tools\":[\"make\"] }
+ }")
+
+(test-begin "hexpm")
+
+(test-assert "hexpm->guix-package"
+  ;; Replace network resources with sample data.
+  (mock ((guix http-client) http-fetch
+         (lambda (url . rest)
+           (match url
+             ("https://hex.pm/api/packages/bla"
+              (values (open-input-string test-bla-package)
+                      (string-length test-bla-package)))
+             ("https://hex.pm/api/packages/bla/releases/1.5.0"
+              (values (open-input-string test-bla-release)
+                      (string-length test-bla-release)))
+             (_ (error "http-fetch got unexpected URL: " url)))))
+  (mock ((guix build download) url-fetch
+         (lambda* (url file-name
+                       #:key
+                       (mirrors '()) verify-certificate?)
+           (with-output-to-file file-name
+             (lambda ()
+               (display
+                (match url
+                  ("https://repo.hex.pm/tarballs/bla-1.5.0.tar"
+                   "source")
+                  (_ (error "url-fetch got unexpected URL: " url))))))))
+    (match (hexpm->guix-package "bla")
+      (('package
+         ('name "erlang-bla")
+         ('version "1.5.0")
+         ('source
+          ('origin
+            ('method 'url-fetch)
+            ('uri ('hexpm-uri "bla" 'version))
+            ('sha256
+             ('base32
+              "0zcl4dgcmqwl1g5xb901pd6dz61r1xgmac9mqlwvh022paa6gks1"))))
+         ('build-system 'rebar-build-system)
+         ('inputs ('list 'erlang-blubb 'erlang-fasel))
+         ('synopsis "A cool package")
+         ('description "This package provides a cool package")
+         ('home-page "https://hex.pm/packages/bla")
+         ('license ('list 'license:expat 'license:asl2.0)))
+       #t)
+      (x
+       (pk 'fail x #f))))))
+
+(test-assert "hexpm-recursive-import"
+  ;; Replace network resources with sample data.
+  (mock ((guix http-client) http-fetch
+         (lambda (url . rest)
+           (match url
+             ("https://hex.pm/api/packages/bla"
+              (values (open-input-string test-bla-package)
+                      (string-length test-bla-package)))
+             ("https://hex.pm/api/packages/bla/releases/1.5.0"
+              (values (open-input-string test-bla-release)
+                      (string-length test-bla-release)))
+             ("https://hex.pm/api/packages/blubb"
+              (values (open-input-string test-blubb-package)
+                      (string-length test-blubb-package)))
+             ("https://hex.pm/api/packages/blubb/releases/0.3.1"
+              (values (open-input-string test-blubb-release)
+                      (string-length test-blubb-release)))
+             ("https://hex.pm/api/packages/fasel"
+              (values (open-input-string test-fasel-package)
+                      (string-length test-fasel-package)))
+             ("https://hex.pm/api/packages/fasel/releases/1.2.1"
+              (values (open-input-string test-fasel-release)
+                      (string-length test-fasel-release)))
+             (_ (error "http-fetch got unexpected URL: " url)))))
+  (mock ((guix build download) url-fetch
+         (lambda* (url file-name
+                       #:key
+                       (mirrors '()) verify-certificate?)
+           (with-output-to-file file-name
+             (lambda ()
+               (display
+                (match url
+                  ("https://repo.hex.pm/tarballs/bla-1.5.0.tar"
+                   "bla-source")
+                  ("https://repo.hex.pm/tarballs/blubb-0.3.1.tar"
+                   "blubb-source")
+                  ("https://repo.hex.pm/tarballs/fasel-1.2.1.tar"
+                   "fasel-source")
+                  (_ (error "url-fetch got unexpected URL: " url))))))))
+        (match (hexpm-recursive-import "bla")
+          ((('package
+              ('name "erlang-blubb")
+              ('version "0.3.1")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('hexpm-uri "blubb" 'version))
+                 ('sha256
+                  ('base32
+                   "17y88b5y8ld7s1c2bcwwwa04pf1cl4402i9zk3inna221ps3ppj2"))))
+              ('build-system 'mix-build-system)
+              ('inputs ('list 'erlang-fasel))
+              ('synopsis "Another cool package")
+              ('description "Another cool package")
+              ('home-page "https://hex.pm/packages/blubb")
+              ('license 'license:expat))
+            ('package
+              ('name "erlang-fasel")
+              ('version "1.2.1")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('hexpm-uri "fasel" 'version))
+                 ('sha256
+                  ('base32
+                   "1k6d70mxwqgq78jrbr7yqnw187yki74jnagybi7nacrj4a67qjha"))))
+              ('build-system 'gnu-build-system)
+              ('synopsis "Yet another cool package")
+              ('description "Yet another cool package")
+              ('home-page "https://hex.pm/packages/fasel")
+              ('license "GPL"))
+            ('package
+              ('name "erlang-bla")
+              ('version "1.5.0")
+              ('source
+               ('origin
+                 ('method 'url-fetch)
+                 ('uri ('hexpm-uri "bla" 'version))
+                 ('sha256
+                  ('base32
+                   "0d3gj746c4swbb1m6ycylxb239jsavvdcizag6bfbg2aqccxwij8"))))
+              ('build-system 'rebar-build-system)
+              ('inputs ('list 'erlang-blubb 'erlang-fasel))
+              ('synopsis "A cool package")
+              ('description "This package provides a cool package")
+              ('home-page "https://hex.pm/packages/bla")
+              ('license ('list 'license:expat 'license:asl2.0))))
+           #t)
+          (x
+           (pk 'fail x #f))))))
+
+(test-end "hexpm")