Make Pandoc dependency optional

1 files changed, 25 insertions, 46 deletions

diff --git a/hakyll.cabal b/hakyll.cabal
index 63bea3b..1e7c202 100644
--- a/hakyll.cabal
+++ b/hakyll.cabal
@@ -99,6 +99,11 @@ Flag buildWebsite
   Default:     False
   Manual:      True
 
+Flag usePandoc
+  Description: Include Pandoc support
+  Default:     True
+  Manual:      True
+
 Library
   Ghc-Options:      -Wall
   Hs-Source-Dirs:   lib
@@ -134,9 +139,6 @@ Library
     Hakyll.Web.Html
     Hakyll.Web.Html.RelativizeUrls
     Hakyll.Web.Paginate
-    Hakyll.Web.Pandoc
-    Hakyll.Web.Pandoc.Biblio
-    Hakyll.Web.Pandoc.FileType
     Hakyll.Web.Redirect
     Hakyll.Web.Tags
     Hakyll.Web.Template
@@ -156,7 +158,6 @@ Library
     Hakyll.Core.Provider.Internal
     Hakyll.Core.Provider.MetadataCache
     Hakyll.Core.Util.Parser
-    Hakyll.Web.Pandoc.Binary
     Paths_hakyll
 
   Build-Depends:
@@ -173,14 +174,10 @@ Library
     filepath             >= 1.0      && < 1.5,
     lrucache             >= 1.1.1    && < 1.3,
     mtl                  >= 1        && < 2.3,
-    network              >= 2.6      && < 2.7,
     network-uri          >= 2.6      && < 2.7,
-    pandoc               >= 2.0.5    && < 2.2,
-    pandoc-citeproc      >= 0.14     && < 0.15,
     parsec               >= 3.0      && < 3.2,
     process              >= 1.6      && < 1.7,
     random               >= 1.0      && < 1.2,
-    regex-base           >= 0.93     && < 0.94,
     regex-tdfa           >= 1.1      && < 1.3,
     resourcet            >= 1.1      && < 1.3,
     scientific           >= 0.3.4    && < 0.4,
@@ -222,6 +219,19 @@ Library
     Cpp-options:
       -DCHECK_EXTERNAL
 
+  If flag(usePandoc)
+    Exposed-Modules:
+      Hakyll.Web.Pandoc
+      Hakyll.Web.Pandoc.Biblio
+      Hakyll.Web.Pandoc.FileType
+    Other-Modules:
+      Hakyll.Web.Pandoc.Binary
+    Build-Depends:
+      pandoc          >= 2.0.5    && < 2.2,
+      pandoc-citeproc >= 0.14     && < 0.15
+    Cpp-options:
+      -DUSE_PANDOC
+
 Test-suite hakyll-tests
   Type:             exitcode-stdio-1.0
   Hs-source-dirs:   tests
@@ -243,7 +253,6 @@ Test-suite hakyll-tests
     Hakyll.Web.CompressCss.Tests
     Hakyll.Web.Html.RelativizeUrls.Tests
     Hakyll.Web.Html.Tests
-    Hakyll.Web.Pandoc.FileType.Tests
     Hakyll.Web.Template.Context.Tests
     Hakyll.Web.Template.Tests
     TestSuite.Util
@@ -256,61 +265,31 @@ Test-suite hakyll-tests
     tasty-quickcheck           >= 0.8  && < 0.11,
     -- Copy pasted from hakyll dependencies:
     base                 >= 4.8      && < 5,
-    binary               >= 0.5      && < 0.10,
-    blaze-html           >= 0.5      && < 0.10,
-    blaze-markup         >= 0.5.1    && < 0.9,
     bytestring           >= 0.9      && < 0.11,
     containers           >= 0.3      && < 0.6,
-    cryptohash           >= 0.7      && < 0.12,
-    data-default         >= 0.4      && < 0.8,
-    deepseq              >= 1.3      && < 1.5,
-    directory            >= 1.0      && < 1.4,
     filepath             >= 1.0      && < 1.5,
-    lrucache             >= 1.1.1    && < 1.3,
-    mtl                  >= 1        && < 2.3,
-    network              >= 2.6      && < 2.7,
-    network-uri          >= 2.6      && < 2.7,
-    pandoc               >= 2.0.5    && < 2.2,
-    pandoc-citeproc      >= 0.14     && < 0.15,
-    parsec               >= 3.0      && < 3.2,
-    process              >= 1.6      && < 1.7,
-    random               >= 1.0      && < 1.2,
-    regex-base           >= 0.93     && < 0.94,
-    regex-tdfa           >= 1.1      && < 1.3,
-    resourcet            >= 1.1      && < 1.3,
-    scientific           >= 0.3.4    && < 0.4,
-    tagsoup              >= 0.13.1   && < 0.15,
     text                 >= 0.11     && < 1.3,
-    time                 >= 1.8      && < 1.10,
-    time-locale-compat   >= 0.1      && < 0.2,
     unordered-containers >= 0.2      && < 0.3,
-    vector               >= 0.11     && < 0.13,
-    yaml                 >= 0.8.11   && < 0.9,
-    optparse-applicative >= 0.12     && < 0.15
+    yaml                 >= 0.8.11   && < 0.9
 
   If flag(previewServer)
-    Build-depends:
-      wai             >= 3.2   && < 3.3,
-      warp            >= 3.2   && < 3.3,
-      wai-app-static  >= 3.1   && < 3.2,
-      http-types      >= 0.9   && < 0.13,
-      fsnotify        >= 0.2   && < 0.3
     Cpp-options:
       -DPREVIEW_SERVER
 
   If flag(watchServer)
-    Build-depends:
-      fsnotify        >= 0.2   && < 0.3
     Cpp-options:
       -DWATCH_SERVER
 
   If flag(checkExternal)
-    Build-depends:
-      http-conduit >= 2.2    && < 2.4,
-      http-types   >= 0.7    && < 0.13
     Cpp-options:
       -DCHECK_EXTERNAL
 
+  If flag(usePandoc)
+    Other-modules:
+      Hakyll.Web.Pandoc.FileType.Tests
+    Cpp-options:
+      -DUSE_PANDOC
+
 Executable hakyll-init
   Main-is:          Init.hs
   Ghc-options:      -Wall -threaded