simplifies release retrieval using git tags

bin/install

@@ -1,15 +1,8 @@
 #!/usr/bin/env bash
 
-ghc_version () {
-    local version=$1
-    local url="https://downloads.haskell.org/~ghc/${version}/"
-    curl -s "$url" | grep -oE 'ghc-[^-]+' | head -n 1 | sed -e 's/ghc-//g'
-}
-
 ghc_install() {
     local install_type=$1
-    local release=$2
-    local version=$(ghc_version $release)
+    local version=$2
     local install_path=$3
 
     local tmp_dir=$(mktemp -d -t haskell_XXXXXXX)

bin/list-all

@@ -1,17 +1,5 @@
 #!/usr/bin/env bash
 
-ghc_releases=https://downloads.haskell.org/~ghc/
-
-# stolen from https://github.com/rbenv/ruby-build/pull/631/files#diff-fdcfb8a18714b33b07529b7d02b54f1dR942
-function sort_versions() {
-  sed 'h; s/[+-]/./g; s/.p\([[:digit:]]\)/.z\1/; s/$/.z/; G; s/\n/ /' | \
-    LC_ALL=C sort -t. -k 1,1 -k 2,2n -k 3,3n -k 4,4n -k 5,5n | awk '{print $2}'
-}
-
-function ghc_versions () {
-  curl -s "$ghc_releases" | grep -oE '[0-9]+\.[^/]+' | uniq
-}
-
-versions="$(ghc_versions | sort_versions)"
-
-echo $versions
+# just print releases
+echo $(git ls-remote --tags --refs https://github.com/ghc/ghc "*release" | 
+           sed 's;^.*refs/tags/ghc-\(.*\)-release$;\1;')