BLD Allow for static building by commenting out cairo

ChangeLog

@@ -1,3 +1,6 @@
+Version 0.10.0+
+	* Disable Cairo dependency when building statically
+
 Version 0.10.0 2018-11-12 by luispedro
 	* Fix to lock1's return value when used with paths (#68 - reopen)
 	* Support _F/_R suffixes for forward/reverse in load_mocat_sample

NGLess/Output.hs

@@ -1,7 +1,7 @@
 {- Copyright 2013-2018 NGLess Authors
  - License: MIT
  -}
-{-# LANGUAGE TemplateHaskell, RecordWildCards #-}
+{-# LANGUAGE TemplateHaskell, RecordWildCards, CPP #-}
 
 module Output
     ( OutputType(..)
@@ -43,8 +43,10 @@ import qualified Data.Conduit as C
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Lazy.Char8 as BL8
 import qualified Data.ByteString.Lazy as BL
+#ifdef HAS_CAIRO
 import qualified Graphics.Rendering.Chart.Easy as G
 import qualified Graphics.Rendering.Chart.Backend.Cairo as G
+#endif
 import           System.Environment (lookupEnv)
 
 
@@ -376,6 +378,7 @@ outputConfiguration = do
         outputListLno' DebugOutput ["\t\t", p]
 
 drawBaseQs :: FilePath -> [BPosInfo] -> IO ()
+#ifdef HAS_CAIRO
 drawBaseQs oname bpos = G.toFile G.def oname $ do
     G.layout_title G..= "FastQ Quality Statistics"
     G.plot (G.line "Mean" [
@@ -386,3 +389,7 @@ drawBaseQs oname bpos = G.toFile G.def oname $ do
                     [(ix, _upperQuartile bp) | (ix,bp) <- zip [1:: Integer ..] bpos]])
     G.plot (G.line "Lower Quartile" [
                     [(ix, _lowerQuartile bp) | (ix,bp) <- zip [1:: Integer ..] bpos]])
+
+#else
+drawBaseQs _ _ = return ()
+#endif

package.yaml

@@ -33,8 +33,6 @@ dependencies:
   - configurator
   - containers
   - convertible
-  - Chart
-  - Chart-cairo
   - data-default
   - deepseq >=1.3
   - directory
@@ -82,6 +80,15 @@ dependencies:
   - yaml
   - zlib
 
+when:
+- condition: ! '!(flag(embed))'
+  then:
+    cc-options: -DHAS_CAIRO
+    cpp-options: -DHAS_CAIRO
+    dependencies:
+      - Chart
+      - Chart-cairo
+
 ghc-options:
   - -Wall
   - -fwarn-tabs