Update install.sh

Author: jcbhmr

install.sh

@@ -1,10 +1,49 @@
 #!/bin/bash
-set -ex
+set -e
 
-cat <<EOF
-----------------------------------------------
+ensure_apt_packages() (
+  set -e
 
-               YOU ARE AWESOME!
+  export DEBIAN_FRONTEND=noninteractive
+  if dpkg -s "$@" &>/dev/null; then
+    echo "🟦 $@ is already installed"
+  else
+    if [[ $(find /var/lib/apt/lists/* | wc -l) == 0 ]]; then
+      echo '🟪 Updating local apt index...'
+      apt-get update -y
+      echo '🟩 Updated local apt index'
+    fi
+    echo "🟪 Installing $@..."
+    apt-get install -y --no-install-recommends "$@"
+    echo "🟩 Installed $@"
+  fi
+)
 
-----------------------------------------------
-EOF
+clear_local_apt_index() (
+  set -e
+  
+  rm -rf /var/lib/apt/lists/*
+  echo '🟩 Cleared local apt index'
+)
+
+ensure_apt_packages curl ca-certificates jq
+
+if [[ -z $VERSION || $VERSION == latest ]]; then
+  echo "🟪 Fetching latest LLVM release..."
+  curl -fsSLo latest-release.json https://api.github.com/repos/llvm/llvm-project/releases/latest
+  version=$(jq -r .tag_name latest-release.json | sed 's/^llvmorg-//')
+  echo "🟦 Using latest LLVM release: v$version"
+else
+  version="$VERSION"
+  echo "🟦 Using LLVM release: v$version"
+fi
+
+ensure_apt_packages lsb-release wget software-properties-common gnupg
+
+echo "🟪 Installing LLVM v$version..."
+wget https://apt.llvm.org/llvm.sh
+chmod +x llvm.sh
+./llvm.sh "$version"
+echo "🟩 Installed LLVM v$version"
+
+clear_local_apt_index