ghcup: add page (#5145)

* ghcup: add page * Update pages/common/ghcup.md Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com> * Update pages/common/ghcup.md Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com> * Update ghcup.md * Update ghcup.md * Update pages/common/ghcup.md Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com> * Update ghcup.md Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com>
2021-01-16 19:41:39 +00:00 · 2021-01-16 19:41:39 +00:00 · c23a73b84e
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+# ghcup
+
+> Haskell toolchain installer.
+> Install, manage, and update Haskell toolchains.
+> More information: <https://gitlab.haskell.org/haskell/ghcup-hs>.
+
+- Start the interactive TUI:
+
+`ghcup tui`
+
+- List available GHC/cabal versions:
+
+`ghcup list`
+
+- Install the recommended GHC version:
+
+`ghcup install ghc`
+
+- Install a specific GHC version:
+
+`ghcup install ghc {{version}}`
+
+- Set the currently "active" GHC version:
+
+`ghcup set ghc {{version}}`
+
+- Install cabal-install:
+
+`ghcup install cabal`
+
+- Update `ghcup` itself:
+
+`ghcup upgrade`