Reworked return codes

Signed-off-by: merspieler <merspieler@airmail.cc>

README.md

@@ -24,5 +24,12 @@ Programs that were not covered by `Getting started`:
   It will make sure, that everything is in the correct format and in the correct datatype.
 * `./delete-db <database>`: Deletes the database.
 
+## Return codes
+* 0: Success
+* 1: Argument error
+* 2: IO error. An error with a file or database
+* 3: Child process failed/can not be called
+* 130: Aborted by user.
+
 ## User scripts
 User scripts in the `scripts/` directory are help scripts contributed by users. They Do not belong to the easy-osm2city concept but extend it. Use only if you know what you do.

build

@@ -151,7 +151,7 @@ def run_command(command):
 		return
 	elif exit_code == 130:
 		print("Interrupted by user. Aborting...")
-		sys.exit(0)
+		sys.exit(130)
 
 start_time = time.time()
 
@@ -180,7 +180,7 @@ try:
 			project_bounds = get_bounds("projects/" + project + "/settings")
 			if project_bounds == []:
 				print("Unable to read project settings")
-				sys.exit(1)
+				sys.exit(2)
 			start_bounds = start_bounds[0]
 			project_bounds = project_bounds[0]
 			if start_bounds["north"] == project_bounds["north"] and start_bounds["east"] == project_bounds["east"]:

create-project

@@ -56,12 +56,12 @@ fi
 source general-settings > /dev/null
 if [ $? == 1 ]; then
         echo "Couldn't find the general settings. Please run ./install first."
-        exit 1
+        exit 2
 fi
 
 if [ ! -f ".databases" ]; then
 	echo "There are no databases created by easy-osm2city. Please create one by running ./create-db"
-	exit 1
+	exit 2
 fi
 
 echo "Which database do you want to use?"
@@ -70,7 +70,7 @@ cat .databases | grep -e "$db_name" > /dev/null
 if [ $? == 1 ]; then
 	echo "Database doesn't exsist. Please choose a different database or create one by running"
 	echo "./create-db -d $db_name"
-	exit 1
+	exit 2
 fi
 
 mkdir -p "projects/$project/scenery"

create-venv

@@ -54,4 +54,5 @@ if [ $? == 1 ]; then
 	echo "shapely"
 	echo "psycopg2-binary"
 	echo "NOTE: use 'source venv/bin/activate' before you install the packages"
+	exit 3
 fi

edit-settings

@@ -68,7 +68,7 @@ if project == "":
 
 if os.path.isfile("projects/" + project + "/params.ini") == False:
 	print("Project '" + project + "' not found")
-	sys.exit(1)
+	sys.exit(2)
 
 console_height, console_width = os.popen('stty size', 'r').read().split()
 
@@ -116,7 +116,7 @@ try:
 						option["value"] = int(value)
 except:
 	print("A problem occured while reading the params.ini file...")
-	sys.exit(1)
+	sys.exit(2)
 finally:
 	ini_file.close()
 

install

@@ -72,7 +72,7 @@ if [ "$skip_install" != 1 ]; then
 		echo "git"
 		echo "Then rerun this script with skip-install argument"
 		echo "./install --skip-install"
-		exit 1
+		exit 3
 	fi
 	sudo apt-get install -y git osmosis postgis pgadmin3 postgresql-contrib postgresql-client postgresql-postgis postgresql python-pip python3-venv
 	if [ $? == 100 ]; then
@@ -91,7 +91,7 @@ if [ "$skip_install" != 1 ]; then
 		echo "git"
 		echo "Then rerun this script with skip-install argument"
 		echo "./install --skip-install"
-		exit 1
+		exit 3
 	fi
 fi
 
@@ -102,7 +102,7 @@ if [ "$skip_git" != 1 ]; then
 		echo "https://gitlab.com/fg-radi/osm2city"
 		echo "https://gitlab.com/fg-radi/osm2city-data"
 		echo "Unzip them in this directory and make sure, the are named osm2city and osm2city-data"
-		exit 1
+		exit 3
 	fi
 	git clone https://gitlab.com/fg-radi/osm2city.git
 	git clone https://gitlab.com/fg-radi/osm2city-data.git