Linux and MacOS install script

src/gam-install.sh

@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+
+update_profile() {
+	[ -f "$1" ] || return 1
+
+	grep -F "$alias_line" "$1" > /dev/null 2>&1
+	if [ $? -ne 0 ]; then
+		echo -e "\n$alias_line" >> "$1"
+	fi
+}
+
+case "$(uname -s)" in
+  Linux)
+    gamos="linux"
+    case "$(uname -m)" in
+      x86_64) gamfile="linux-x86_64.tar.xz";;
+      i386) gamfile="linux-i686.tar.xz";;
+      i686) gamfile="linux-i686.tar.xz";;
+      arm*) gamfile="linux-armv7l.tar.xz";;
+      *) echo "Sorry, this installer currently only supports i386, x86_64 and arm Linux. Exiting."; return;;
+    esac
+    ;;
+  Darwin)
+    gamos="macos"
+    gamfile="macos.tar.xz"
+    ;;
+  *)
+    echo "Sorry, this installer currently only supports Linux and MacOS. Exiting."
+    return
+    ;;
+esac
+
+if [ "$1" == "prerelease" ]; then
+  release_url="https://api.github.com/repos/jay0lee/GAM/releases"
+else
+  release_url="https://api.github.com/repos/jay0lee/GAM/releases/latest"
+fi
+
+echo "Checking GitHub for latest GAM release..."
+latest_release_json=$(curl -s $release_url 2>&1 /dev/null)
+
+echo "Getting file and download URL..."
+# Python is sadly the nearest to universal way to safely handle JSON with Bash
+# At least this code should be compatible with just about any Python version ever
+# unlike GAM itself. If some users don't have Python we can try grep / sed / etc
+# but that gets really ugly
+pycode="import json
+import sys
+l = json.load(sys.stdin)
+if type(l) is list:
+  l = l[0]
+for i in l['assets']:
+  if i[sys.argv[1]].endswith('$gamfile'):
+    print i[sys.argv[1]]
+    break"
+browser_download_url=$(echo "$latest_release_json" | python -c "$pycode" browser_download_url)
+name=$(echo "$latest_release_json" | python -c "$pycode" name)
+# Temp dir for archive
+temp_archive_dir=$(mktemp -d)
+
+echo "Downloading file $name from $browser_download_url to $temp_archive_dir"
+
+# Save archive to temp w/o losing our path
+(cd $temp_archive_dir && curl -O -L $browser_download_url)
+
+mkdir -p ~/bin
+
+tar xf $temp_archive_dir/$name -C ~/bin
+
+# Update profile to add gam command
+alias_line="alias gam=~/bin/gam/gam"
+if [ "$gamos" == "linux" ]; then
+  update_profile "$HOME/.bashrc" || update_profile "$HOME/.bash_profile"
+elif [ "$gamos" == "macos" ]; then
+  update_profile "$HOME/.profile" || update_profile "$HOME/.bash_profile"
+fi
+
+echo -e "\n"
+while true; do
+  read -p "Can you run a full browser on this machine? (usually Y for MacOS, N for Linux if you SSH  into this machine) " yn
+  case $yn in
+    [Yy]*) break;;
+    [Nn]*) touch ~/bin/gam/nobrowser.txt; break;;
+    * ) echo "Please answer yes or no.";;
+  esac
+done
+
+echo -e "\n"
+
+while true; do
+  read -p "GAM is now installed. Are you ready to set up a Google API project for GAM? (yes or no) " yn
+  case $yn in
+    [Yy]*) ~/bin/gam/gam create project; break;;
+    [Nn]*) echo -e "\nYou can create an API project later by running:\n\ngam create project"; break;;
+    * ) echo "Please answer yes or no.";;
+  esac
+done
+
+~/bin/gam/gam version
+
+# Clean up after ourselves even if we are killed with CTRL-C
+trap "rm -rf $temp_archive_dir" EXIT