Remove ide-backend

There are two reasons for this:
1. It causes our travis builds to run out of memory.
2. ide-backend doesn’t really provide anything which we don’t already
have and it doesn’t fit in very well (e.g. it can’t reuse ghc sessions).

Author: cocreature

.travis.yml

@@ -21,10 +21,18 @@ before_install:
 install:
 - "./travis_long stack +RTS -N2 -RTS setup"
 - "./travis_long stack build --only-snapshot"
-- "./travis_long stack install ide-backend-server"
 script:
-- "STACK_YAML=stack_test.yaml ./travis_long stack +RTS -N1 -RTS build --test --no-run-tests"
-- "./travis_long stack +RTS -N1 -RTS build --test"
+- >
+  ./travis_long stack +RTS -N1 -RTS build --test
+                        --flag hie-apply-refact:pedantic
+                        --flag hie-base:pedantic
+                        --flag hie-docs-generator:pedantic
+                        --flag hie-eg-plugin-async:pedantic
+                        --flag hie-example-plugin2:pedantic
+                        --flag hie-ghc-mod:pedantic
+                        --flag hie-ghc-tree:pedantic
+                        --flag hie-hare:pedantic
+                        --flag hie-plugin-api:pedantic
 - "./travis_long stack exec emacs24 -- -q --batch -L elisp -l elisp/tests/hie-tests.el
   -f ert-run-tests-batch-and-exit"
 - "./travis_long ./deploy-docs.sh"

Makefile

@@ -5,22 +5,27 @@ ifeq (,$(shell which $(emacs) 2> /dev/null))
 endif
 
 .PHONY: test
-test: build-haskell test-haskell test-emacs
+test: test-haskell test-emacs
 
 .PHONY: test-emacs
 test-emacs:
 	stack exec $(emacs) -- -q --batch -L elisp -l elisp/tests/hie-tests.el -f ert-run-tests-batch-and-exit
 
-.PHONY: build-haskell
-build-haskell:
-	@STACK_YAML=stack_test.yaml stack build --test --no-run-tests
-
 .PHONY: test-haskell
 test-haskell:
 # stack build --test --pedantic
 # stack complains about deprecations in ghc-mod as an extra dep
 # build with -Werror enabled but run the tests without it because ide-backend picks it up
-	stack build --test
+	stack build --test --flag haskell-ide-engine:pedantic \
+					   --flag hie-apply-refact:pedantic \
+					   --flag hie-base:pedantic \
+					   --flag hie-docs-generator:pedantic \
+					   --flag hie-eg-plugin-async:pedantic \
+					   --flag hie-example-plugin2:pedantic \
+					   --flag hie-ghc-mod:pedantic \
+					   --flag hie-ghc-tree:pedantic \
+					   --flag hie-hare:pedantic \
+					   --flag hie-plugin-api:pedantic
 
 .PHONY: ghci-test
 ghci-test:

app/MainHie.hs

@@ -51,7 +51,6 @@ import           Haskell.Ide.ExamplePluginAsync
 import           Haskell.Ide.GhcModPlugin
 import           Haskell.Ide.GhcTreePlugin
 import           Haskell.Ide.HaRePlugin
-import           Haskell.Ide.IdeBackend
 
 -- ---------------------------------------------------------------------
 
@@ -65,7 +64,6 @@ taggedPlugins =
   :& Plugin (Proxy :: Proxy "ghctree") ghcTreeDescriptor
   :& Plugin (Proxy :: Proxy "hare") hareDescriptor
   :& Plugin (Proxy :: Proxy "base") baseDescriptor
-  :& Plugin (Proxy :: Proxy "ide-backend") idebackendDescriptor
   :& RNil
 
 recProxy :: Rec f t -> Proxy t

haskell-ide-engine.cabal

@@ -88,7 +88,6 @@ executable hie
                      , hie-ghc-mod
                      , hie-ghc-tree
                      , hie-hare
-                     , hie-ide-backend
                      , hie-plugin-api
                      , monad-logger
                      , optparse-applicative
@@ -114,7 +113,6 @@ test-suite haskell-ide-test
                        GhcModPluginSpec
                        GhcTreePluginSpec
                        HaRePluginSpec
-                       IdeBackendPluginSpec
                        JsonStdioSpec
                        JsonSpec
                        UtilsSpec
@@ -130,7 +128,6 @@ test-suite haskell-ide-test
                      , hie-apply-refact
                      , hie-base
                      , hie-eg-plugin-async
-                     , hie-ide-backend
                      , hie-ghc-mod
                      , hie-ghc-tree
                      , hie-hare

hie-ide-backend/Haskell/Ide/IdeBackend.hs

@@ -10,7 +10,6 @@ packages:
 - hie-ghc-tree
 - hie-hare
 - hie-docs-generator
-- hie-ide-backend
 - location:
     git: https://github.com/mpickering/apply-refact.git
     commit: 402458652844c1a0f42b15123e0ceff761919415