update install.sh to check for v0 and ask to continue (#184)

* update install.sh to check for v0 and ask to continue

* pseudo code

* pseudo

* continue

* continue

* continue

* implement logic

* tab

* full path to agent db

* Update install.sh

* Update install.sh

* Update install.sh

* Update install.sh

* Update install.sh

* Update install.sh

Co-authored-by: Efim Poberezkin <8711996+efim-poberezkin@users.noreply.github.com>

* Update install.sh

* Update install.sh

Co-authored-by: Efim Poberezkin <8711996+efim-poberezkin@users.noreply.github.com>

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

install.sh

@@ -1,7 +1,8 @@
 set -eu
 
 APP_NAME="simplex-chat"
-TARGET_DIR="$HOME/.local/bin"
+BIN_DIR="$HOME/.local/bin"
+BIN_PATH="$BIN_DIR/$APP_NAME"
 PLATFORM="$(uname)"
 
 if [ $PLATFORM == "Darwin" ]; then
@@ -10,39 +11,88 @@ elif [ $PLATFORM == "Linux" ]; then
 	PLATFORM="ubuntu-20_04-x86-64"
 else
 	echo "Scripted installation on your platform is not supported."
-	echo "See compiled binaries in the latest release: https://github.com/simplex-chat/simplex-chat/releases/latest"
+	echo "See compiled binaries in the latest release: https://github.com/$APP_NAME/$APP_NAME/releases/latest"
 	exit 1
 fi
 
-[ ! -d $TARGET_DIR ] && mkdir -p $TARGET_DIR
+# / Prepare to upgrade from v0 to v1
+
+# Determine path of chat binary
+if [[ -n "$(which $APP_NAME)" ]]; then
+	binary=$(which $APP_NAME)
+elif [[ -f "$BIN_PATH" ]]; then
+	binary=$BIN_PATH
+else
+	binary=""
+fi
+
+# If chat binary not found, check v0 initial migration and offer to abort or continue
+if [[ -z $binary ]]; then
+	agent_db="$HOME/.simplex/simplex.agent.db"
+	if [[ \
+		-f "$agent_db" && \
+		$(echo "select * from migrations;" | sqlite3 $agent_db | grep 20210101_initial) \
+	]]; then
+		echo "Warning: found SimpleX Chat database, the current version is not backwards compatible."
+		echo "If you continue, the current version will be installed as $APP_NAME with a clean database, the old database will be preserved."
+		while true; do
+			read -p "Please choose to (a)bort or (c)ontinue: " yn
+			case $yn in
+					[Aa]* ) exit 1 ;;
+					[Cc]* ) break ;;
+					* ) echo "Please answer 'a' or 'c'."
+			esac
+		done
+	fi
+# If chat binary found, check version and offer to abort or continue, on continue rename chat binary
+elif [[ ! $($binary -h | grep v1) ]]; then
+	echo "Warning: found a previous version of SimpleX Chat, the current version is not backwards compatible."
+	echo "If you continue, it will be renamed to $APP_NAME-v0, and the new version will be installed as $APP_NAME with a clean database."
+	while true; do
+		read -p "Please choose (a)bort or (c)ontinue: " yn
+		case $yn in
+				[Aa]* ) exit 1 ;;
+				[Cc]* )
+					binary_v0="$binary-v0"
+					mv ${binary} ${binary_v0}
+					echo "Renamed $binary into $binary_v0"
+					break
+					;;
+				* ) echo "Please answer 'a' or 'c'."
+		esac
+	done
+fi
+# Prepare to upgrade from v0 to v1 /
+
+[ ! -d $BIN_DIR ] && mkdir -p $BIN_DIR
 
 if [ -n "$(command -v curl)" ]; then
-	curl -L -o $TARGET_DIR/$APP_NAME "https://github.com/$APP_NAME/$APP_NAME/releases/latest/download/$APP_NAME-$PLATFORM"
+	curl -L -o $BIN_PATH "https://github.com/$APP_NAME/$APP_NAME/releases/latest/download/$APP_NAME-$PLATFORM"
 elif [ -n "$(command -v wget)" ]; then
-	wget -O $TARGET_DIR/$APP_NAME "https://github.com/$APP_NAME/$APP_NAME/releases/latest/download/$APP_NAME-$PLATFORM"
+	wget -O $BIN_PATH "https://github.com/$APP_NAME/$APP_NAME/releases/latest/download/$APP_NAME-$PLATFORM"
 else
-	echo "Cannot download simplex-chat - please install curl or wget"
+	echo "Cannot download $APP_NAME - please install curl or wget"
 	exit 1
 fi
 
-chmod +x $TARGET_DIR/$APP_NAME
+chmod +x $BIN_PATH
 
 echo "$APP_NAME installed sucesfully!"
 
-if [ -z "$(command -v simplex-chat)" ]; then
+if [ -z "$(command -v $APP_NAME)" ]; then
 	if [ -n "$($SHELL -c 'echo $ZSH_VERSION')" ]; then
 		SHELL_FILE="$HOME/.zshrc"
 	elif [ -n "$($SHELL -c 'echo $BASH_VERSION')" ]; then
 		SHELL_FILE="$HOME/.bashrc"
 	else
-		echo "Unknown shell - cannot add simplex-chat folder to PATH"
+		echo "Unknown shell - cannot add $APP_NAME folder to PATH"
-		echo "Please add $TARGET_DIR to PATH variable"
+		echo "Please add $BIN_DIR to PATH variable"
-		echo "Or you can run simplex-chat via full path: $TARGET_DIR/simplex-chat"
+		echo "Or you can run $APP_NAME via full path: $BIN_PATH"
 	fi
 	if [ -n "$SHELL_FILE" ]; then
-		echo "export PATH=\$PATH:$TARGET_DIR" >> $SHELL_FILE
+		echo "export PATH=\$PATH:$BIN_DIR" >> $SHELL_FILE
-		echo "Source your $SHELL_FILE or open a new shell and type simplex-chat to run it"
+		echo "Source your $SHELL_FILE or open a new shell and type $APP_NAME to run it"
 	fi
 else
-	echo "Type simplex-chat in your terminal to run it"
+	echo "Type $APP_NAME in your terminal to run it"
 fi