Alert user if upgraded ghcup is shadowed by old ghcup

Also alerts if the binary is not in PATH at all.

Fixes #111

.gitlab-ci.yml

@@ -125,8 +125,8 @@ test:linux:bootstrap_script:
   script:
     - ./.gitlab/script/ghcup_bootstrap.sh
   variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
   extends:
     - .debian
 
@@ -135,14 +135,14 @@ test:linux:bootstrap_script:
 test:linux:recommended:
   extends: .test_ghcup_version:linux
   variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
 
 test:linux:latest:
   extends: .test_ghcup_version:linux
   variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
   allow_failure: true
 
 ######## linux 32bit test ########
@@ -150,7 +150,7 @@ test:linux:latest:
 test:linux:recommended:32bit:
   extends: .test_ghcup_version:linux32
   variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.2"
     CABAL_VERSION: "3.2.0.0"
 
 ######## darwin test ########
@@ -158,14 +158,14 @@ test:linux:recommended:32bit:
 test:mac:recommended:
   extends: .test_ghcup_version:darwin
   variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
 
 test:mac:latest:
   extends: .test_ghcup_version:darwin
   variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
   allow_failure: true
 
 
@@ -174,14 +174,14 @@ test:mac:latest:
 test:freebsd:recommended:
   extends: .test_ghcup_version:freebsd
   variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
 
 test:freebsd:latest:
   extends: .test_ghcup_version:freebsd
   variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
   allow_failure: true
 
 
@@ -195,8 +195,8 @@ release:linux:64bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "x86_64-linux-ghcup"
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
 
 
 release:linux:32bit:
@@ -207,7 +207,7 @@ release:linux:32bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "i386-linux-ghcup"
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.2"
     CABAL_VERSION: "3.2.0.0"
 
 
@@ -222,8 +222,8 @@ release:darwin:
     - ./.gitlab/before_script/darwin/install_deps.sh
   variables:
     ARTIFACT: "x86_64-apple-darwin-ghcup"
-    GHC_VERSION: "8.8.3"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
     MACOSX_DEPLOYMENT_TARGET: "10.7"
 
 
@@ -238,6 +238,6 @@ release:freebsd:
     - ./.gitlab/before_script/freebsd/install_deps.sh
   variables:
     ARTIFACT: "x86_64-portbld-freebsd-ghcup"
-    GHC_VERSION: "8.8.3"
+    GHC_VERSION: "8.10.3"
-    CABAL_VERSION: "3.2.0.0"
+    CABAL_VERSION: "3.4.0.0"
 

.gitlab/before_script/darwin/install_deps.sh

@@ -9,8 +9,9 @@ mkdir -p "${TMPDIR}"
 curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-apple-darwin-ghcup > ./ghcup-bin
 chmod +x ghcup-bin
 
-./ghcup-bin install ${GHC_VERSION}
+./ghcup-bin upgrade -i -f
-./ghcup-bin set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
 
 exit 0

.gitlab/before_script/freebsd/install_deps.sh

@@ -11,8 +11,9 @@ mkdir -p "${TMPDIR}"
 curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-portbld-freebsd-ghcup > ./ghcup-bin
 chmod +x ghcup-bin
 
-./ghcup-bin install ${GHC_VERSION}
+./ghcup-bin upgrade -i -f
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
-./ghcup-bin set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
 
 exit 0

.gitlab/before_script/linux/alpine/install_deps.sh

@@ -24,8 +24,9 @@ else
 	curl -sSfL https://downloads.haskell.org/ghcup/x86_64-linux-ghcup > ./ghcup-bin
 fi
 chmod +x ghcup-bin
-./ghcup-bin install ${GHC_VERSION}
+./ghcup-bin upgrade -i -f
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
 
 # utils
 apk add --no-cache \

.gitlab/before_script/linux/install_deps.sh

@@ -12,7 +12,8 @@ sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev li
 curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-linux-ghcup > ./ghcup-bin
 chmod +x ghcup-bin
 
-./ghcup-bin install ${GHC_VERSION}
+./ghcup-bin upgrade -i -f
-./ghcup-bin set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
 

.gitlab/script/ghcup_release.sh

@@ -22,9 +22,9 @@ if [ "${OS}" = "LINUX" ] ; then
 		ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static' -ftui
 	fi
 elif [ "${OS}" = "FREEBSD" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib static" -ftui
+	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib +static" -ftui
 else
-	ecabal build -w ghc-${GHC_VERSION} --constraint="zlib static" --constraint="lzma static" -ftui
+	ecabal build -w ghc-${GHC_VERSION} --constraint="zlib +static" --constraint="lzma +static" -ftui
 fi
 
 mkdir out

.travis/build.sh

@@ -2,23 +2,21 @@
 
 set -ex
 
-## install ghc via old ghcup
-
 mkdir -p ~/.ghcup/bin
-curl https://gitlab.haskell.org/haskell/ghcup/raw/master/ghcup > ~/.ghcup/bin/ghcup
+curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-apple-darwin-ghcup > ~/.ghcup/bin/ghcup
 chmod +x ~/.ghcup/bin/ghcup
 
 export PATH="$HOME/.ghcup/bin:$PATH"
 
-ghcup install 8.8.3
+ghcup install 8.10.3
-ghcup install-cabal 3.2.0.0
+ghcup install-cabal 3.4.0.0-rc4
-ghcup set 8.8.3
+ghcup set 8.10.3
 
 
 ## install ghcup
 
 cabal update
-cabal build --constraint="zlib static" --constraint="lzma static" -ftui
+cabal build --constraint="zlib +static" --constraint="lzma +static" -ftui
 cp "$(cabal new-exec --verbose=0 --offline sh -- -c 'command -v ghcup')" .
 strip ./ghcup
 cp ghcup "./${ARTIFACT}"

app/ghcup-gen/Validate.hs

@@ -67,7 +67,7 @@ validate dls = do
     forM_ (M.toList dls) $ \(t, versions) ->
       forM_ (M.toList versions) $ \(v, vi) ->
         forM_ (M.toList $ _viArch vi) $ \(arch, pspecs) -> do
-          checkHasRequiredPlatforms t v arch (M.keys pspecs)
+          checkHasRequiredPlatforms t v (_viTags vi) arch (M.keys pspecs)
 
     checkGHCVerIsValid
     forM_ (M.toList dls) $ \(t, _) -> checkMandatoryTags t
@@ -81,17 +81,18 @@ validate dls = do
         lift $ $(logInfo) [i|All good|]
         pure ExitSuccess
  where
-  checkHasRequiredPlatforms t v arch pspecs = do
+  checkHasRequiredPlatforms t v tags arch pspecs = do
     let v' = prettyVer v
+        arch' = prettyArch arch
     when (not $ any (== Linux UnknownLinux) pspecs) $ do
       lift $ $(logError)
-        [i|Linux UnknownLinux missing for for #{t} #{v'} #{arch}|]
+        [i|Linux UnknownLinux missing for for #{t} #{v'} #{arch'}|]
       addError
     when ((not $ any (== Darwin) pspecs) && arch == A_64) $ do
-      lift $ $(logError) [i|Darwin missing for #{t} #{v'} #{arch}|]
+      lift $ $(logError) [i|Darwin missing for #{t} #{v'} #{arch'}|]
       addError
     when ((not $ any (== FreeBSD) pspecs) && arch == A_64) $ lift $ $(logWarn)
-      [i|FreeBSD missing for #{t} #{v'} #{arch}|]
+      [i|FreeBSD missing for #{t} #{v'} #{arch'}|]
 
     -- alpine needs to be set explicitly, because
     -- we cannot assume that "Linux UnknownLinux" runs on Alpine
@@ -99,8 +100,9 @@ validate dls = do
     when (not $ any (== Linux Alpine) pspecs) $
       case t of
         GHCup -> (lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]) >> addError
-        Cabal | v > [vver|2.4.1.0|] -> (lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]) >> addError
+        Cabal | v > [vver|2.4.1.0|] -> (lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch'}|]) >> addError
-        _     -> lift $ $(logWarn) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]
+        GHC | Latest `elem` tags || Recommended `elem` tags -> lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch'}|]
+        _ -> lift $ $(logWarn) [i|Linux Alpine missing for #{t} #{v'} #{arch'}|]
 
   checkUniqueTags tool = do
     let allTags = join $ M.elems $ availableToolVersions dls tool

cabal.ghc8103.project

@@ -0,0 +1,38 @@
+with-compiler: ghc-8.10.3
+
+packages: ./ghcup.cabal
+
+optional-packages: ./3rdparty/*/*.cabal
+
+source-repository-package
+    type: git
+    location: https://github.com/haskus/packages.git
+    tag: 80a1c5fc07f7226c424250ec17f674cd4d618f42
+    subdir: haskus-utils-types
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-io
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-directory
+
+optimization: 2
+
+package streamly
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+
+package ghcup
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+
+constraints: http-io-streams -brotli
+
+package libarchive
+  flags: -system-libarchive
+
+allow-newer: base, ghc-prim, template-haskell

cabal.ghc8103.project.freeze

@@ -0,0 +1,261 @@
+active-repositories: hackage.haskell.org:merge
+constraints: any.Cabal ==3.2.1.0,
+             any.HUnit ==1.6.2.0,
+             any.IfElse ==0.85,
+             any.QuickCheck ==2.14.2,
+             QuickCheck -old-random +templatehaskell,
+             any.StateVar ==1.2.1,
+             any.abstract-deque ==0.3,
+             abstract-deque -usecas,
+             any.aeson ==1.5.5.1,
+             aeson -bytestring-builder -cffi -developer -fast,
+             any.aeson-pretty ==0.8.8,
+             aeson-pretty -lib-only,
+             any.alex ==3.2.6,
+             alex +small_base,
+             any.ansi-terminal ==0.11,
+             ansi-terminal -example,
+             any.ansi-wl-pprint ==0.6.9,
+             ansi-wl-pprint -example,
+             any.array ==0.5.4.0,
+             any.ascii-string ==1.0.1.4,
+             any.assoc ==1.0.2,
+             any.async ==2.2.2,
+             async -bench,
+             any.atomic-primops ==0.8.4,
+             atomic-primops -debug,
+             any.attoparsec ==0.13.2.4,
+             attoparsec -developer,
+             any.auto-update ==0.1.6,
+             any.base ==4.14.1.0,
+             any.base-compat ==0.11.2,
+             any.base-compat-batteries ==0.11.2,
+             any.base-orphans ==0.8.4,
+             any.base16-bytestring ==1.0.1.0,
+             any.base64-bytestring ==1.2.0.1,
+             any.bifunctors ==5.5.10,
+             bifunctors +semigroups +tagged,
+             any.binary ==0.8.8.0,
+             any.blaze-builder ==0.4.2.1,
+             any.bytestring ==0.10.12.0,
+             any.bz2 ==1.0.1.0,
+             bz2 -cross +with-bzlib,
+             any.c2hs ==0.28.7,
+             c2hs +base3 -regression,
+             any.call-stack ==0.3.0,
+             any.case-insensitive ==1.2.1.0,
+             any.casing ==0.1.4.1,
+             any.cereal ==0.5.8.1,
+             cereal -bytestring-builder,
+             any.chs-cabal ==0.1.1.0,
+             any.chs-deps ==0.1.0.0,
+             chs-deps -cross,
+             any.clock ==0.8.2,
+             clock -llvm,
+             any.cmdargs ==0.10.20,
+             cmdargs +quotation -testprog,
+             any.colour ==2.3.5,
+             any.comonad ==5.0.8,
+             comonad +containers +distributive +indexed-traversable,
+             any.composition-prelude ==3.0.0.2,
+             composition-prelude -development,
+             any.concurrent-output ==1.10.12,
+             any.conduit ==1.3.4,
+             any.conduit-extra ==1.3.5,
+             any.containers ==0.6.2.1,
+             any.contravariant ==1.5.3,
+             contravariant +semigroups +statevar +tagged,
+             any.cryptohash-sha256 ==0.11.102.0,
+             cryptohash-sha256 -exe +use-cbits,
+             any.data-default-class ==0.1.2.0,
+             any.data-fix ==0.3.0,
+             any.deepseq ==1.4.4.0,
+             any.deferred-folds ==0.9.15,
+             any.directory ==1.3.6.0,
+             any.distributive ==0.6.2.1,
+             distributive +semigroups +tagged,
+             any.dlist ==1.0,
+             dlist -werror,
+             any.easy-file ==0.2.2,
+             any.errors ==2.3.0,
+             any.exceptions ==0.10.4,
+             any.fast-logger ==3.0.2,
+             any.filepath ==1.4.2.1,
+             any.focus ==1.0.2,
+             any.foldl ==1.4.10,
+             any.free ==5.1.6,
+             any.fusion-plugin-types ==0.1.0,
+             any.generic-arbitrary ==0.1.0,
+             any.generics-sop ==0.5.1.0,
+             any.ghc-boot-th ==8.10.3,
+             any.ghc-prim ==0.6.1,
+             ghcup -internal-downloader -tar -tui,
+             any.happy ==1.20.0,
+             any.hashable ==1.3.0.0,
+             hashable -examples +integer-gmp +sse2 -sse41,
+             any.haskell-src-exts ==1.23.1,
+             any.haskell-src-meta ==0.8.5,
+             any.haskus-utils-data ==1.3,
+             any.haskus-utils-types ==1.5,
+             any.haskus-utils-variant ==3.0,
+             any.heaps ==0.3.6.1,
+             any.hpath ==0.11.0,
+             any.hpath-directory ==0.14.1,
+             any.hpath-filepath ==0.10.4,
+             any.hpath-io ==0.14.1,
+             any.hpath-posix ==0.13.2,
+             any.hsc2hs ==0.68.7,
+             hsc2hs -in-ghc-tree,
+             any.hspec ==2.7.8,
+             any.hspec-core ==2.7.8,
+             any.hspec-discover ==2.7.8,
+             any.hspec-expectations ==0.8.2,
+             any.hspec-golden-aeson ==0.7.0.0,
+             any.indexed-profunctors ==0.1,
+             any.indexed-traversable ==0.1.1,
+             any.integer-gmp ==1.0.3.0,
+             any.integer-logarithms ==1.0.3.1,
+             integer-logarithms -check-bounds +integer-gmp,
+             any.language-c ==0.8.3,
+             language-c -allwarnings +iecfpextension +separatesyb +usebytestrings,
+             any.libarchive ==3.0.2.1,
+             libarchive -cross -low-memory -system-libarchive,
+             any.libyaml ==0.1.2,
+             libyaml -no-unicode -system-libyaml,
+             any.lifted-base ==0.2.3.12,
+             any.list-t ==1.0.4,
+             any.lockfree-queue ==0.2.3.1,
+             lzma -static,
+             any.math-functions ==0.3.4.1,
+             math-functions +system-erf +system-expm1,
+             any.megaparsec ==9.0.1,
+             megaparsec -dev,
+             any.microlens ==0.4.11.2,
+             any.microlens-mtl ==0.2.0.1,
+             any.microlens-th ==0.4.3.9,
+             any.mmorph ==1.1.4,
+             any.monad-control ==1.0.2.3,
+             any.monad-logger ==0.3.36,
+             monad-logger +template_haskell,
+             any.monad-loops ==0.4.3,
+             monad-loops +base4,
+             any.mono-traversable ==1.0.15.1,
+             any.mtl ==2.2.2,
+             any.mwc-random ==0.15.0.1,
+             any.network ==3.1.2.1,
+             network -devel,
+             any.old-locale ==1.0.0.7,
+             any.old-time ==1.1.0.3,
+             any.optics ==0.3,
+             any.optics-core ==0.3.0.1,
+             any.optics-extra ==0.3,
+             any.optics-th ==0.3.0.2,
+             any.optics-vl ==0.2.1,
+             any.optparse-applicative ==0.16.1.0,
+             optparse-applicative +process,
+             any.os-release ==1.0.1,
+             os-release -devel,
+             any.parallel ==3.2.2.0,
+             any.parsec ==3.1.14.0,
+             any.parser-combinators ==1.2.1,
+             parser-combinators -dev,
+             any.pretty ==1.1.3.6,
+             any.pretty-terminal ==0.1.0.0,
+             any.primitive ==0.7.0.1,
+             any.primitive-extras ==0.8,
+             any.primitive-unlifted ==0.1.3.0,
+             any.process ==1.6.9.0,
+             any.profunctors ==5.6.1,
+             any.quickcheck-arbitrary-adt ==0.3.1.0,
+             any.quickcheck-io ==0.2.0,
+             any.random ==1.2.0,
+             any.recursion-schemes ==5.2.1,
+             recursion-schemes +template-haskell,
+             any.regex-base ==0.94.0.0,
+             any.regex-posix ==0.96.0.0,
+             regex-posix -_regex-posix-clib,
+             any.resourcet ==1.2.4.2,
+             any.rts ==1.0,
+             any.safe ==0.3.19,
+             any.safe-exceptions ==0.1.7.1,
+             any.scientific ==0.3.6.2,
+             scientific -bytestring-builder -integer-simple,
+             any.semigroupoids ==5.3.5,
+             semigroupoids +comonad +containers +contravariant +distributive +tagged +unordered-containers,
+             any.setenv ==0.1.1.3,
+             any.sop-core ==0.5.0.1,
+             any.split ==0.2.3.4,
+             any.splitmix ==0.1.0.3,
+             splitmix -optimised-mixer,
+             any.stm ==2.5.0.0,
+             any.stm-chans ==3.0.0.4,
+             any.streaming-commons ==0.2.2.1,
+             streaming-commons -use-bytestring-builder,
+             any.streamly ==0.7.2,
+             streamly -debug -dev -examples -examples-sdl -fusion-plugin -has-llvm -inspection -no-fusion -streamk,
+             any.streamly-bytestring ==0.1.2,
+             any.streamly-posix ==0.1.0.1,
+             any.strict ==0.4.0.1,
+             strict +assoc,
+             any.strict-base ==0.4.0.0,
+             any.string-interpolate ==0.3.0.2,
+             string-interpolate -bytestring-builder -extended-benchmarks -text-builder,
+             any.syb ==0.7.2.1,
+             any.tagged ==0.8.6.1,
+             tagged +deepseq +transformers,
+             any.tasty ==1.3.1,
+             tasty +clock,
+             any.tasty-hunit ==0.10.0.3,
+             any.tasty-quickcheck ==0.10.1.2,
+             any.template-haskell ==2.16.0.0,
+             any.terminal-size ==0.3.2.1,
+             any.terminfo ==0.4.1.4,
+             any.text ==1.2.4.1,
+             any.text-conversions ==0.3.1,
+             any.text-short ==0.1.3,
+             text-short -asserts,
+             any.tf-random ==0.5,
+             any.th-abstraction ==0.4.2.0,
+             any.th-compat ==0.1,
+             any.th-expand-syns ==0.4.6.0,
+             any.th-lift ==0.8.2,
+             any.th-lift-instances ==0.1.18,
+             any.th-orphans ==0.13.11,
+             any.th-reify-many ==0.1.9,
+             any.these ==1.1.1.1,
+             these +assoc,
+             any.time ==1.9.3,
+             any.time-compat ==1.9.5,
+             time-compat -old-locale,
+             any.transformers ==0.5.6.2,
+             any.transformers-base ==0.4.5.2,
+             transformers-base +orphaninstances,
+             any.transformers-compat ==0.6.6,
+             transformers-compat -five +five-three -four +generic-deriving +mtl -three -two,
+             any.typed-process ==0.2.6.0,
+             any.unbounded-delays ==0.1.1.1,
+             any.unix ==2.7.2.2,
+             any.unix-bytestring ==0.3.7.3,
+             any.unix-compat ==0.5.3,
+             unix-compat -old-time,
+             any.unix-time ==0.4.7,
+             any.unliftio-core ==0.2.0.1,
+             any.unordered-containers ==0.2.13.0,
+             unordered-containers -debug,
+             any.uri-bytestring ==0.3.3.0,
+             uri-bytestring -lib-werror,
+             any.utf8-string ==1.0.2,
+             any.uuid-types ==1.0.3,
+             any.vector ==0.12.2.0,
+             vector +boundschecks -internalchecks -unsafechecks -wall,
+             any.vector-algorithms ==0.8.0.4,
+             vector-algorithms +bench +boundschecks -internalchecks -llvm +properties -unsafechecks,
+             any.versions ==4.0.2,
+             any.vty ==5.32,
+             any.wcwidth ==0.0.2,
+             wcwidth -cli +split-base,
+             any.word8 ==0.1.3,
+             any.yaml ==0.11.5.0,
+             yaml +no-examples +no-exe,
+             zlib -non-blocking-ffi -pkg-config -static
+index-state: hackage.haskell.org 2021-02-04T20:08:20Z

ghcup-0.0.4.yaml

@@ -28,7 +28,7 @@ toolRequirements:
           - libncurses5
           - libtinfo5
           notes: ''
-        ">= 20.04":
+        "( >= 20.04 && < 20.10 )":
           distroPKGs:
           - build-essential
           - curl
@@ -40,6 +40,18 @@ toolRequirements:
           - libncurses5
           - libtinfo5
           notes: ''
+        "( >= 20.10 )":
+          distroPKGs:
+          - build-essential
+          - curl
+          - libffi-dev
+          - libffi8ubuntu1
+          - libgmp-dev
+          - libgmp10
+          - libncurses-dev
+          - libncurses5
+          - libtinfo5
+          notes: ''
       Linux_CentOS:
         '( >= 7 && < 8 )':
           distroPKGs:
@@ -193,7 +205,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-802-64-deb8
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.0.2-x86_64-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.0.2/ghc-8.0.2-x86_64-alpine-linux.tar.xz
               dlSubdir: ghc-8.0.2
               dlHash: 517783b660a27ebf95b2568d47292fd633d5f9a4de4c80ad1ccf05e1b9d7313f
           Linux_UnknownLinux:
@@ -220,7 +232,7 @@ ghcupDownloads:
               dlHash: 818621342a2161b8afcc995a0765816bb40aefbfa1db2c8a7d59c04d8b18228a
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.0.2-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.0.2/ghc-8.0.2-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.0.2
               dlHash: b4cd12a1048b2fff2f23c9eec0dd3a1174d54d017f8d79ec79af4534118e6881
           Linux_UnknownLinux:
@@ -251,7 +263,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-822-64-deb8
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.2.2-x86_64-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.2.2/ghc-8.2.2-x86_64-alpine-linux.tar.xz
               dlSubdir: ghc-8.2.2
               dlHash: adcf3a320a3c402aba07ae9586990dc3c0b550e96aeffb1b9e194313d3ba716d
           Linux_UnknownLinux:
@@ -287,7 +299,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-822-32-deb8
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.2.2-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.2.2/ghc-8.2.2-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.2.2
               dlHash: 467534c32552cfd318753112dbc70af003693aad4b0081f2a07e61f5b5ea2c22
           Linux_UnknownLinux:
@@ -482,7 +494,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-844-64-centos
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.4.4-x86_64-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.4.4/ghc-8.4.4-x86_64-alpine-linux.tar.xz
               dlSubdir: ghc-8.4.4
               dlHash: 336affff8314d3dc5e85d9c09015ae2ba8a7658b459c8c8ae77ecaa551a56ae7
           Linux_AmazonLinux:
@@ -511,7 +523,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-844-32-deb8
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.4.4-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.4.4/ghc-8.4.4-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.4.4
               dlHash: 892888d388ef5c9cadf5cfba1146d62237c25b9b066fb62fee940b2b285fd308
           Linux_UnknownLinux:
@@ -765,7 +777,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-865-64-centos
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.6.5-x86_64-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.6.5/ghc-8.6.5-x86_64-alpine-linux.tar.xz
               dlSubdir: ghc-8.6.5
               dlHash: b9d3ed7f7aa24ef2d58bb579252289caa0b8877adee3685e3af2fb73d440afdc
           Linux_AmazonLinux:
@@ -779,7 +791,7 @@ ghcupDownloads:
               dlHash: dfc1bdb1d303a87a8552aa17f5b080e61351f2823c2b99071ec23d0837422169
           FreeBSD:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.6.5-x86_64-portbld-freebsd.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.6.5/ghc-8.6.5-x86_64-portbld-freebsd.tar.xz
               dlSubdir: ghc-8.6.5
               dlHash: 83a3059a630d40a98e26cb5b520354e12094a96e36ba2f5ab002dad94cf2fb37
         A_32:
@@ -794,7 +806,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-865-32-deb9
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.6.5-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.6.5/ghc-8.6.5-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.6.5
               dlHash: 3737837550d9b177acfe150e3a3cd4545427ded020487c2ed5194d7b8f116349
           Linux_UnknownLinux:
@@ -963,7 +975,7 @@ ghcupDownloads:
               dlHash: 7016de90dd226b06fc79d0759c5d4c83c2ab01d8c678905442c28bd948dbb782
           FreeBSD:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.8.3-x86_64-portbld-freebsd.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.8.3/ghc-8.8.3-x86_64-portbld-freebsd.tar.xz
               dlSubdir: ghc-8.8.3
               dlHash: 569719075b4d14b3875a899df522090ae31e6fe085e6dffe518e875b09a2f0be
         A_32:
@@ -1016,7 +1028,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-884-64-centos
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.8.4-x86_64-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.8.4/ghc-8.8.4-x86_64-alpine-linux.tar.xz
               dlSubdir: ghc-8.8.4
               dlHash: 90c6a1661de7f20c7d169cd6270125035b3332063e45103ce028df0beecf434e
           Linux_AmazonLinux:
@@ -1030,7 +1042,7 @@ ghcupDownloads:
               dlHash: e80a789e9d8cfb41dd87f3284b75432427c4461c1731d220d04ead8733ccdb5e
           FreeBSD:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.8.4-x86_64-portbld-freebsd.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.8.4/ghc-8.8.4-x86_64-portbld-freebsd.tar.xz
               dlSubdir: ghc-8.8.4
               dlHash: 8cebe5ccf454e82acd1ff52ca57590d1ab0f3f44a981b46257ec12158c8c447e
         A_32:
@@ -1045,7 +1057,7 @@ ghcupDownloads:
             unknown_versioning: *ghc-884-32-deb9
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.8.4-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.8.4/ghc-8.8.4-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.8.4
               dlHash: 1d18e89ee031197e55c48683e78a7ffc67601ac5fd9f73aac555eb064b3859a2
           Linux_UnknownLinux:
@@ -1106,7 +1118,7 @@ ghcupDownloads:
               dlHash: 65b1ca361093de4804a7e40b3e68178e1ef720f84f743641ec8d95e56a45b3a8
           FreeBSD:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.10.1-x86_64-portbld-freebsd.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.10.1/ghc-8.10.1-x86_64-portbld-freebsd.tar.xz
               dlSubdir: ghc-8.10.1
               dlHash: e8646ec9b60fd40aa9505ee055f22f04601290ab7a1342c2cf37c34de9d3f142
         A_32:
@@ -1122,13 +1134,14 @@ ghcupDownloads:
             unknown_versioning: *ghc-8101-32-deb9
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.10.1-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.10.1/ghc-8.10.1-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.10.1
               dlHash: 7360cc6b29e9b4ab08f6ea5bc3bcca6f5c216933e81ef1620dcdd700f1fdb289
           Linux_UnknownLinux:
             unknown_versioning: *ghc-8101-32-deb9
     8.10.2:
       viTags:
+      - old
       - base-4.14.1.0
       viChangeLog: https://downloads.haskell.org/~ghc/8.10.2/docs/html/users_guide/8.10.2-notes.html
       viSourceDL:
@@ -1200,12 +1213,11 @@ ghcupDownloads:
             unknown_versioning: *ghc-8102-32-deb9
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.10.2-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.10.2/ghc-8.10.2-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.10.2
               dlHash: 9ee1cf1e85e9536088b3c9e80e975074e525ea378cd4eb156071bbc4b7b38327
     8.10.3:
       viTags:
-      - Recommended
       - base-4.14.1.0
       viChangeLog: https://downloads.haskell.org/~ghc/8.10.3/docs/html/users_guide/8.10.3-notes.html
       viSourceDL:
@@ -1277,9 +1289,86 @@ ghcupDownloads:
             unknown_versioning: *ghc-8103-32-deb9
           Linux_Alpine:
             unknown_versioning:
-              dlUri: https://files.hasufell.de/ghc/ghc-8.10.3-i386-alpine-linux.tar.xz
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.10.3/ghc-8.10.3-i386-alpine-linux.tar.xz
               dlSubdir: ghc-8.10.3
               dlHash: 309201cdefd2d13b8b3fd09c26c6137048c490d219a0a9c7407c3ce1d011f60c
+    8.10.4:
+      viTags:
+      - Recommended
+      - base-4.14.1.0
+      viChangeLog: https://downloads.haskell.org/~ghc/8.10.4/docs/html/users_guide/8.10.4-notes.html
+      viSourceDL:
+        dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-src.tar.xz
+        dlSubdir: ghc-8.10.4
+        dlHash: 52af871b4e08550257d720c2944ac85727d0b948407cef1bebfe7508c224910e
+      viArch:
+        A_64:
+          Linux_Debian:
+            '( >= 9 && < 10 )': &ghc-8104-64-deb9
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-deb9-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: 5694200a5c38f22c142baf850b1d2f3784211d2ec9302e11693259a1ae8e38b7
+            '( >= 10 && < 11 )': &ghc-8104-64-deb10
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-deb10-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: 816365565e9927459b035515a7db6a0db62f9796f327389b6f8a0035d12fbda0
+            unknown_versioning: *ghc-8104-64-deb9
+          Linux_Ubuntu:
+            unknown_versioning: &ghc-8104-64-fedora
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-fedora27-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: a189eed900a8717d6d7906bafd10b9a9a9688ad942d1c75e19df480376dff9ea
+            '( >= 16 && < 19 )': *ghc-8104-64-deb9
+          Linux_Mint:
+            unknown_versioning: *ghc-8104-64-deb10
+          Linux_Fedora:
+            '( >= 27 && < 28 )': *ghc-8104-64-fedora
+            unknown_versioning: *ghc-8104-64-fedora
+          Linux_CentOS:
+            '( >= 7 && < 8 )': &ghc-8104-64-centos
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-centos7-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: fb8a91f0cf06594172aff46c2f6f7486179e1c3760855c79fbdd3012598cc2cd
+            unknown_versioning: *ghc-8104-64-centos
+          Linux_RedHat:
+            unknown_versioning: *ghc-8104-64-centos
+          Linux_Alpine:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-alpine3.10-linux-integer-simple.tar.xz
+              dlSubdir: ghc-8.10.4-x86_64-unknown-linux
+              dlHash: 74c2c07537832708502716ef4ec40019f8e552ddda13c8eadf8f7c4b03a79359
+          Linux_AmazonLinux:
+            unknown_versioning: *ghc-8104-64-centos
+          Linux_UnknownLinux:
+            unknown_versioning: *ghc-8104-64-fedora
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-apple-darwin.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: 725ecf6543e63b81a3581fb8c97afd21a08ae11bc0fa4f8ee25d45f0362ef6d5
+          FreeBSD:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-x86_64-portbld-freebsd.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: c9776a2ccf9629b03e967206a507fcdcb6c5189800a626e9461ababf6733c357
+        A_32:
+          Linux_Debian:
+            '( >= 9 && < 10 )': &ghc-8104-32-deb9
+              dlUri: https://downloads.haskell.org/~ghc/8.10.4/ghc-8.10.4-i386-deb9-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: 0022c5b9ac22825bb7b4745af3d92cef0ba1ecd01fab3ef387ddbd47146569ad
+            unknown_versioning: *ghc-8104-32-deb9
+          Linux_Ubuntu:
+            unknown_versioning: *ghc-8104-32-deb9
+          Linux_Mint:
+            unknown_versioning: *ghc-8104-32-deb9
+          Linux_UnknownLinux:
+            unknown_versioning: *ghc-8104-32-deb9
+          Linux_Alpine:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/8.10.4/ghc-8.10.4-i386-alpine-linux.tar.xz
+              dlSubdir: ghc-8.10.4
+              dlHash: 9161a98bed763692101854d83af69c1316030cfe5ee6f6acde283d04ef139735
     9.0.1:
       viTags:
       - Latest
@@ -1352,6 +1441,11 @@ ghcupDownloads:
             unknown_versioning: *ghc-901-32-deb9
           Linux_UnknownLinux:
             unknown_versioning: *ghc-901-32-deb9
+          Linux_Alpine:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/ghc/9.0.1/ghc-9.0.1-i386-alpine-linux.tar.xz
+              dlSubdir: ghc-9.0.1
+              dlHash: ebfeb3b91e6f2bb5a49fd3376746f7fd1b89e62e9838bf5b1530a8756ff1e6aa
   Cabal:
     2.4.1.0:
       viTags:
@@ -1418,8 +1512,7 @@ ghcupDownloads:
               dlHash: 6898ccd6e6dc0872999c06daaf61d546164e12f60a1880d09852c9f0c59c5cf6
     3.2.0.0:
       viTags:
-      - Recommended
+      - old
-      - Latest
       viChangeLog: https://downloads.haskell.org/~cabal/cabal-install-3.2.0.0/changelog
       viArch:
         A_64:
@@ -1448,30 +1541,40 @@ ghcupDownloads:
             unknown_versioning:
               dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.2.0.0/cabal-install-3.2.0.0-i386-unknown-linux.tar.xz
               dlHash: 2b3ac28549916de5f3379241797eaf60e84b6c001f2abbe73d9fadbbaf768e93
-    3.4.0.0-rc4:
+    3.4.0.0:
       viTags:
-      - Prerelease
+      - Recommended
+      - Latest
       viChangeLog: https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.4.0.0.md
       viArch:
         A_64:
           Linux_Ubuntu:
-            unknown_versioning: &cabal-3400rc4-ubuntu
+            unknown_versioning: &cabal-3400-ubuntu
-              dlUri: http://oleg.fi/cabal-install-3.4.0.0-rc4/cabal-install-3.4.0.0-x86_64-ubuntu-16.04.tar.xz
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-x86_64-ubuntu-16.04.tar.xz
-              dlHash: a1be168876816a624b206c55596d9bb5f442541c889ee2438d664698122b9ffe
+              dlHash: cf28f9ffd763476aa2b1730d85cbf155d366fac541f78ee3951e8cb2d6de63e6
           Linux_Alpine:
             unknown_versioning:
-              dlUri: http://oleg.fi/cabal-install-3.4.0.0-rc4/cabal-install-3.4.0.0-x86_64-alpine-3.11.6-static-noofd.tar.xz
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-x86_64-alpine-3.11.6-static-noofd.tar.xz
-              dlHash: 49dab6684483594e4c7c3e561ec477268002605253ad34701b471277efbe91bc
+              dlHash: c74073fe79110946182e522fcadc8dcabf07c87583e8cf7801ed4e0c327241f6
           Linux_UnknownLinux:
-            unknown_versioning: *cabal-3400rc4-ubuntu
+            unknown_versioning: *cabal-3400-ubuntu
           Darwin:
             unknown_versioning:
-              dlUri: http://oleg.fi/cabal-install-3.4.0.0-rc4/cabal-install-3.4.0.0-x86_64-darwin-sierra.tar.xz
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-x86_64-darwin-sierra.tar.xz
-              dlHash: a3f809a3388e90b9fdf52444e30ea9aad3894e2cbe53c37fc3311ceb106eda9e
+              dlHash: cb10be9a53e856aa2d852fd88fb6944f138783ffe0ea84d93c9a69244e34ea91
           FreeBSD:
             unknown_versioning:
-              dlUri: http://oleg.fi/cabal-install-3.4.0.0-rc4/cabal-install-3.4.0.0-x86_64-freebsd-12.1-release.tar.xz
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-x86_64-freebsd-12.1-release.tar.xz
-              dlHash: 9705e16d03497b46be4ad477e6c64d10890af853eafa8a9adf6dba89aa9e05f7
+              dlHash: a1e2db664ec00e42a1e071a4181f6476f6e0bad321f1ddc0cf27831119f4c6d4
+        A_32:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-i386-debian-9.tar.xz
+              dlHash: ef3750644a53f7b1fad141b2ad02d4c7a3b239ec0cbfa7f0528fb02c1dfcebce
+          Linux_Alpine:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/cabal/3.4.0.0/cabal-install-3.4.0.0-i386-alpine-linux-musl.tar.gz
+              dlHash: 95adb65f3a72aa8d9ce83685bc06e1eee5b801f56e204e27e957e8a35abd9cf8
   GHCup:
     0.1.12:
       viTags:

lib/GHCup.hs

@@ -1314,12 +1314,24 @@ upgradeGHCup dls mtarget force pfreq = do
   tmp   <- lift withGHCupTmpDir
   let fn = [rel|ghcup|]
   p <- liftE $ download dli tmp (Just fn)
-  let fullDest = fromMaybe (binDir </> fn) mtarget
+  let destDir = dirname destFile
-  liftIO $ hideError NoSuchThing $ deleteFile fullDest
+      destFile = fromMaybe (binDir </> fn) mtarget
+  lift $ $(logDebug) [i|mkdir -p #{toFilePath destDir}|]
+  liftIO $ createDirRecursive' destDir
+  lift $ $(logDebug) [i|rm -f #{toFilePath destFile}|]
+  liftIO $ hideError NoSuchThing $ deleteFile destFile
+  lift $ $(logDebug) [i|cp #{toFilePath p} #{toFilePath destFile}|]
   handleIO (throwE . CopyError . show) $ liftIO $ copyFile p
-                                                           fullDest
+                                                           destFile
                                                            Overwrite
-  lift $ chmod_755 fullDest
+  lift $ chmod_755 destFile
+
+  liftIO (isInPath destFile) >>= \b -> when (not b) $
+    lift $ $(logWarn) [i|"#{toFilePath (dirname destFile)}" is not in PATH! You have to add it in order to use ghcup.|]
+  liftIO (isShadowed destFile) >>= \case
+    Nothing -> pure ()
+    Just pa -> lift $ $(logWarn) [i|ghcup is shadowed by "#{toFilePath pa}". The upgrade will not be in effect, unless you remove "#{toFilePath pa}" or make sure "#{toFilePath destDir}" comes before "#{toFilePath (dirname pa)}" in PATH.|]
+
   pure latestVer
 
 

lib/GHCup/Utils/File.hs

@@ -407,6 +407,32 @@ searchPath paths needle = go paths
       else pure False
 
 
+-- | Check wether a binary is shadowed by another one that comes before
+-- it in PATH. Returns the path to said binary, if any.
+isShadowed :: Path Abs -> IO (Maybe (Path Abs))
+isShadowed p = do
+  let dir = dirname p
+  fn <- basename p
+  spaths <- catMaybes . fmap parseAbs <$> (liftIO getSearchPath)
+  if dir `elem` spaths
+  then do
+    let shadowPaths = takeWhile (/= dir) spaths
+    searchPath shadowPaths fn
+  else pure Nothing
+
+
+-- | Check whether the binary is in PATH. This returns only `True`
+-- if the directory containing the binary is part of PATH.
+isInPath :: Path Abs -> IO Bool
+isInPath p = do
+  let dir = dirname p
+  fn <- basename p
+  spaths <- catMaybes . fmap parseAbs <$> (liftIO getSearchPath)
+  if dir `elem` spaths
+  then isJust <$> searchPath [dir] fn
+  else pure False
+
+
 findFiles :: Path Abs -> Regex -> IO [Path Rel]
 findFiles path regex = do
   dirStream <- openDirStream (toFilePath path)