Use modern packaging practices

- Move sources under src
- Use hpack via package.yaml
- Remove the network-uri flag

.gitignore

@@ -1,8 +1,3 @@
-*.swp
-.cabal-sandbox
+*.cabal
 .env*
 .stack-work
-cabal-dev/
-cabal.sandbox.config
-dist/
-tags

package.yaml

@@ -0,0 +1,72 @@
+---
+name: yesod-auth-oauth2
+version: '0.3.0'
+synopsis: OAuth 2.0 authentication plugins
+description: Library to authenticate with OAuth 2.0 for Yesod web applications.
+category: Web
+author: Tom Streller
+maintainer: Pat Brisbin <pat@thoughtbot.com>
+license: BSD3
+github: thoughtbot/yesod-auth-oauth2.git
+homepage: http://github.com/thoughtbot/yesod-auth-oauth2
+
+dependencies:
+  - base >=4.5 && <5
+
+library:
+  source-dirs: src
+  dependencies:
+    - aeson >=0.6 && <1.3
+    - authenticate >=1.3.2.7 && <1.4
+    - bytestring >=0.9.1.4
+    - hoauth2 >=1.3.0 && <1.6
+    - http-client >=0.4.0 && <0.6
+    - http-conduit >=2.0 && <3.0
+    - http-types >=0.8 && <0.10
+    - lifted-base >=0.2 && <0.4
+    - microlens
+    - network-uri >=2.6
+    - random
+    - text >=0.7 && <2.0
+    - transformers >=0.2.2 && <0.6
+    - uri-bytestring
+    - vector >=0.10 && <0.13
+    - yesod-auth >=1.3 && <1.5
+    - yesod-core >=1.2 && <1.5
+    - yesod-form >=1.3 && <1.5
+
+executables:
+  yesod-auth-oauth2-example:
+    main: main.hs
+    source-dirs: example
+    ghc-options:
+      - -threaded
+      - -rtsopts
+      - -with-rtsopts=-N
+    dependencies:
+      - yesod-auth-oauth2
+      - containers
+      - http-conduit
+      - load-env
+      - text
+      - warp
+      - yesod
+      - yesod-auth
+    when:
+      - condition: ! '!(flag(example))'
+        buildable: false
+
+tests:
+  test:
+    main: Spec.hs
+    source-dirs: test
+    dependencies:
+      - yesod-auth-oauth2
+      - hspec
+      - uri-bytestring
+
+flags:
+  example:
+    description: Build the example application
+    manual: false
+    default: false

stack.yaml

@@ -1,8 +1,5 @@
 ---
 resolver: lts-9.18
-flags:
-  yesod-auth-oauth2:
-    network-uri: true
 packages:
   - .
 extra-deps:

yesod-auth-oauth2.cabal

@@ -1,96 +0,0 @@
-name:            yesod-auth-oauth2
-version:         0.3.0
-license:         BSD3
-license-file:    LICENSE
-author:          Tom Streller
-maintainer:      Pat Brisbin <pat@thoughtbot.com>
-synopsis:        OAuth 2.0 authentication plugins
-description:     Library to authenticate with OAuth 2.0 for Yesod web applications.
-category:        Web
-stability:       Experimental
-cabal-version:   >= 1.8
-build-type:      Simple
-homepage:        http://github.com/thoughtbot/yesod-auth-oauth2
-
-flag network-uri
-   description: Get Network.URI from the network-uri package
-   default: True
-
-flag example
-  description: Build the example application
-  default: False
-
-library
-    if flag(network-uri)
-        build-depends: network-uri >= 2.6
-    else
-        build-depends: network < 2.6
-
-    build-depends:   base                    >= 4.5       && < 5
-                   , bytestring              >= 0.9.1.4
-                   , http-client             >= 0.4.0     && < 0.6
-                   , http-conduit            >= 2.0       && < 3.0
-                   , http-types              >= 0.8       && < 0.10
-                   , aeson                   >= 0.6       && < 1.3
-                   , yesod-core              >= 1.2       && < 1.5
-                   , authenticate            >= 1.3.2.7   && < 1.4
-                   , random
-                   , yesod-auth              >= 1.3       && < 1.5
-                   , text                    >= 0.7       && < 2.0
-                   , yesod-form              >= 1.3       && < 1.5
-                   , transformers            >= 0.2.2     && < 0.6
-                   , hoauth2                 >= 1.3.0     && < 1.6
-                   , lifted-base             >= 0.2       && < 0.4
-                   , vector                  >= 0.10      && < 0.13
-                   , uri-bytestring
-                   , microlens
-
-    exposed-modules: Yesod.Auth.OAuth2
-                     Yesod.Auth.OAuth2.Github
-                     Yesod.Auth.OAuth2.Google
-                     Yesod.Auth.OAuth2.Spotify
-                     Yesod.Auth.OAuth2.Upcase
-                     Yesod.Auth.OAuth2.EveOnline
-                     Yesod.Auth.OAuth2.Nylas
-                     Yesod.Auth.OAuth2.Slack
-                     Yesod.Auth.OAuth2.Salesforce
-                     Yesod.Auth.OAuth2.Bitbucket
-                     Yesod.Auth.OAuth2.BattleNet
-                     URI.ByteString.Extension
-                     -- ^ exposed for testing
-
-    ghc-options:     -Wall
-
-executable yesod-auth-oauth2-example
-  if flag(example)
-    buildable: True
-  else
-    buildable: False
-
-  hs-source-dirs:      example
-  main-is:             main.hs
-  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
-  build-depends:       base
-                     , containers
-                     , http-conduit
-                     , load-env
-                     , text
-                     , warp
-                     , yesod
-                     , yesod-auth
-                     , yesod-auth-oauth2
-
-test-suite test
-  type:              exitcode-stdio-1.0
-  main-is:           Spec.hs
-  hs-source-dirs:    test
-  ghc-options:       -Wall
-  build-depends:   base
-                 , yesod-auth-oauth2
-                 , hspec
-                 , uri-bytestring
-  other-modules:   URI.ByteString.ExtensionSpec
-
-source-repository head
-  type:     git
-  location: https://github.com/thoughtbot/yesod-auth-oauth2.git