Drop compatibility with GHC 8.6.5 (#3101)

* Drop compatibility with GHC 8.6.5

* drop a few more bits

* fixup merge

Co-authored-by: Javier Neira <atreyu.bbb@gmail.com>

Author: pepeiborra

.github/workflows/caching.yml

@@ -85,7 +85,6 @@ jobs:
              , "9.0.2"
              , "8.10.7"
              , "8.8.4"
-             , "8.6.5"
              ]
         os: [ "ubuntu-latest"
             , "macOS-latest"

.github/workflows/flags.yml

@@ -48,7 +48,6 @@ jobs:
              , "9.0.2"
              , "8.10.7"
              , "8.8.4"
-             , "8.6.5"
              ]
         os: [ "ubuntu-latest"
             ]

.github/workflows/hackage.yml

@@ -41,7 +41,6 @@ jobs:
         ghc: [ "9.0.2"
              , "8.10.7"
              , "8.8.4"
-             , "8.6.5"
              ]
         exclude:
         - ghc: "9.0.2"

.github/workflows/test.yml

@@ -64,7 +64,6 @@ jobs:
              , "9.0.2"
              , "8.10.7"
              , "8.8.4"
-             , "8.6.5"
              ]
         os: [ "ubuntu-latest"
             , "macOS-latest"
@@ -86,9 +85,6 @@ jobs:
            - os: ubuntu-latest
              ghc: '8.8.4'
              test: true
-           - os: ubuntu-latest
-             ghc: '8.6.5'
-             test: true
            - os: windows-latest
              ghc: '9.4.2'
              test: true
@@ -101,9 +97,6 @@ jobs:
            - os: windows-latest
              ghc: '8.10.7'
              test: true
-           - os: windows-latest
-             ghc: '8.6.5'
-             test: true
            # only build rest of supported ghc versions for windows
            - os: windows-latest
              ghc: '8.8.4'

.gitpod.Dockerfile

@@ -7,7 +7,6 @@ RUN sudo install-packages build-essential curl libffi-dev libffi7 libgmp-dev lib
     echo 'export PATH=$HOME/.cabal/bin:$HOME/.local/bin:$PATH' >> $HOME/.bashrc && \
     . /home/gitpod/.ghcup/env && \
     # Install all verions of GHC that HLS supports. Putting GHC into Docker image makes workspace start much faster.
-    ghcup install ghc 8.6.5 && \
     ghcup install ghc 8.8.4 && \
     ghcup install ghc 8.10.7 && \
     ghcup install ghc 9.0.2 && \

bindist/ghcs

@@ -1,4 +1,3 @@
-8.6.5,cabal.project
 8.8.4,cabal.project
 8.10.7,cabal.project
 9.0.2,cabal.project

docs/support/ghc-version-support.md

@@ -32,7 +32,7 @@ Support status (see the support policy below for more details):
 | 8.8.4        | [latest](https://github.com/haskell/haskell-language-server/releases/latest)       | full support, will be deprecated after LTS and HLS full support for ghc-9.2 |
 | 8.8.3        | [1.5.1](https://github.com/haskell/haskell-language-server/releases/1.5.1)         | deprecated                                                                  |
 | 8.8.2        | [1.2.0](https://github.com/haskell/haskell-language-server/releases/tag/1.2.0)     | deprecated                                                                  |
-| 8.6.5        | [latest](https://github.com/haskell/haskell-language-server/releases/latest)       | full support, will be deprecated after LTS and HLS full suppot for ghc-9.2  |
+| 8.6.5        | [1.8.0.0](https://github.com/haskell/haskell-language-server/releases/tag/1.8.0.0) | deprecated                                                                  |
 | 8.6.4        | [1.4.0](https://github.com/haskell/haskell-language-server/releases/tag/1.4.0)     | deprecated                                                                  |
 
 GHC versions not in the list have never been supported by HLS.

ghcide/ghcide.cabal

@@ -13,7 +13,7 @@ description:
     A library for building Haskell IDE's on top of the GHC API.
 homepage:           https://github.com/haskell/haskell-language-server/tree/master/ghcide#readme
 bug-reports:        https://github.com/haskell/haskell-language-server/issues
-tested-with:        GHC == 8.6.5 || == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.3 || == 9.2.4
+tested-with:        GHC == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.3 || == 9.2.4
 extra-source-files: README.md CHANGELOG.md
                     test/data/**/*.project
                     test/data/**/*.cabal

haskell-language-server.cabal

@@ -14,7 +14,7 @@ copyright:          The Haskell IDE Team
 license:            Apache-2.0
 license-file:       LICENSE
 build-type:         Simple
-tested-with:        GHC == 8.6.5 || == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.3 || == 9.2.4
+tested-with:        GHC == 8.8.4 || == 8.10.7 || == 9.0.2 || == 9.2.3 || == 9.2.4
 extra-source-files:
   README.md
   ChangeLog.md

hls-graph/src/Development/IDE/Graph/Internal/Types.hs

@@ -13,9 +13,7 @@ module Development.IDE.Graph.Internal.Types where
 import           Control.Applicative
 import           Control.Monad.Catch
 #if __GLASGOW_HASKELL__ < 808
--- Needed in GHC 8.6.5
 import           Control.Concurrent.STM.Stats  (TVar, atomically)
-import           Control.Monad.Fail
 #else
 import           GHC.Conc                      (TVar, atomically)
 #endif