Fix CI scripts (#454)

See #453

.travis.yml

@@ -76,10 +76,12 @@ install:
     - cabal update
     - cabal install alex happy
 
+    # GHC comes with an older version of Hadrian, so we delete it
+    - rm -r ghc/hadrian/*
+
     # Travis has already cloned Hadrian into ./ and we need to move it
     # to ./ghc/hadrian -- one way to do it is to move the .git directory
     # and perform a hard reset in order to regenerate Hadrian files
-    - mkdir ghc/hadrian
     - mv .git ghc/hadrian
     - cd ghc/hadrian
     - git reset --hard HEAD

appveyor.yml

-clone_folder: "c:\\ghc\\hadrian"
+clone_folder: "c:\\new-hadrian"
 environment:
   global:
     STACK_ROOT: "c:\\sr"
@@ -11,24 +11,26 @@ install:
     - curl -ostack.zip -LsS --insecure https://www.stackage.org/stack/windows-x86_64
     - 7z x stack.zip stack.exe
 
+    # Note: AppVeyor has already cloned Hadrian into c:\new-hadrian
     # Fetch GHC sources into c:\ghc
-    # Note: AppVeyor has already cloned Hadrian into c:\ghc\hadrian, so it's tricky
     - cd ..
-    - git init
-    - git remote add origin git://git.haskell.org/ghc.git
-    - git pull --recurse-submodules origin master
-    - git submodule update --init --recursive --quiet
+    - git clone --recursive git://git.haskell.org/ghc.git
+    # GHC comes with an older version of Hadrian, so we delete it
+    - rm -rf ghc\hadrian
+    # Move new Hadrian into ./ghc/hadrian
+    - mv new-hadrian ghc\hadrian
+
+    # Install Alex and Happy
+    - set PATH=C:\Users\appveyor\AppData\Roaming\local\bin;%PATH%
+    - ghc\hadrian\stack install --install-ghc alex happy > nul
 
     # Install all Hadrian and GHC build dependencies
-    - cd hadrian
+    - cd ghc\hadrian
     - stack setup > nul
     - appveyor-retry stack exec -- pacman -S autoconf automake-wrapper make patch python tar --noconfirm
 
 build_script:
-    # Build Hadrian
-    - stack build alex happy # Otherwise 'build' fails on AppVeyor
-
-    # Run internal Hadrian tests
+    # Build Hadrian and run internal Hadrian tests
     - build selftest
 
     # Build GHC

circle.yml

@@ -21,7 +21,8 @@ compile:
     - git config --global url."git://github.com/ghc/packages-".insteadOf git://github.com/ghc/packages/
     - git clone --depth 1 --recursive git://github.com/ghc/ghc
 
-    - mkdir ghc/hadrian
+    # GHC comes with an older version of Hadrian, so we delete it
+    - rm -r ghc/hadrian/*
     # move hadrian's .git into ./ghc/hadrian and perform a hard reset in order to regenerate Hadrian files
     - mv .git ghc/hadrian
     # NOTE: we must write them in the same line because each line