smarter keycloak update script

updates/keycloak.sh

@@ -1,14 +1,14 @@
 #!/bin/bash
 set -e
 
-if [ -z "$1" ]
-then
-        echo "ERROR: Can't continue. Version querying not implemented, because we might not use the latest major release."
-        echo "Usage: bash ./update.sh 9.9.9"
-        exit 1
-fi
-export XDG_RUNTIME_DIR=/run/user/$UID
+#
+# Use ./update.sh 1.2.3 to OVERRIDE the release check.
+#
+# Without an argument, THIS SCRIPT WILL AUTODETECT the release
+# that was tagged as "latest" by the project.
+#
 
+export XDG_RUNTIME_DIR=/run/user/$UID
 location=$HOME
 olddir=`readlink $location/latest`
 
@@ -16,14 +16,37 @@ olddir=`readlink $location/latest`
 # script does not require this to function
 #themename=mytheme
 
+if [ -z "$1" ]
+    then
+        release=`curl -L https://api.github.com/repos/keycloak/keycloak/releases/latest -s | jq -r '.tag_name'`
+        echo ">>> Detected v$release being tagged as the latest release."
+    else
+        release=$1
+fi
+
+current_release=$(cat latest/version.txt)
+current_release=${current_release#'Keycloak - Version '}
+
+if [[ $current_release == "$release" ]]
+    then
+        echo ">>> It appears, are on v$current_release. Nothing to do."
+        exit
+    else
+        read -p "Proceed? With Keycloak ${release}?" -n 1 -r
+        if [[ ! $REPLY =~ ^[Yy]$ ]]
+            then
+                [[ "$0" = "$BASH_SOURCE" ]] && exit 1 || return 1
+        fi
+fi
+
 systemctl stop --user keycloak
 
 cd $location
 
 # FIXME: move to rsync or use git tags directly
-wget "https://github.com/keycloak/keycloak/releases/download/$1/keycloak-$1.zip"
-unzip keycloak-$1.zip
-rm keycloak-$1.zip
+wget "https://github.com/keycloak/keycloak/releases/download/$release/keycloak-$release.zip"
+unzip keycloak-$release.zip
+rm keycloak-$release.zip
 
 [ -L $location/latest ] && rm -v $location/latest
 ln -sv $location/keycloak-$1 $location/latest