File contents can now be only strings

Allowing file contents to be represented with lists added
unnecessary complexity also in UI implementations.

docs/source/backends/openwrt.rst

@@ -202,8 +202,8 @@ dictionary is structured as follows:
 +===================+================+==========+==========================================================+
 | ``path``          | string         | yes      | path of the file in the tar.gz archive                   |
 +-------------------+----------------+----------+----------------------------------------------------------+
-| ``contents``      | string or list | yes      | | *string*: plain text contents of the file              |
-|                   |                |          | | *list*: lines of strings representing lines of file    |
+| ``contents``      | string         | yes      | plain text contents of the file, new lines must be       |
+|                   |                |          | encoded as `\n`                                          |
 +-------------------+----------------+----------+----------------------------------------------------------+
 | ``mode``          | string         | no       | permissions, if omitted will default to ``0644``         |
 +-------------------+----------------+----------+----------------------------------------------------------+

netjsonconfig/backends/openwrt/schema.py

@@ -297,10 +297,8 @@
                         "type": "string"
                     },
                     "contents": {
-                        "anyOf": [
-                            {"type": "string", "format": "textarea"},
-                            {"type": "array"}
-                        ]
+                        "type": "string",
+                        "format": "textarea"
                     },
                     "mode": {
                         "type": "string",

tests/openwrt/test_backend.py

@@ -284,10 +284,8 @@ def test_file_inclusion(self):
             "files": [
                 {
                     "path": "/etc/crontabs/root",
-                    "contents": [
-                        '* * * * * echo "test" > /etc/testfile',
-                        '* * * * * echo "test2" > /etc/testfile2'
-                    ]
+                    "contents": '* * * * * echo "test" > /etc/testfile\n'
+                                '* * * * * echo "test2" > /etc/testfile2'
                 },
                 {
                     "path": "/etc/dummy.conf",
@@ -304,7 +302,7 @@ def test_file_inclusion(self):
         # first file
         crontab = tar.getmember('etc/crontabs/root')
         contents = tar.extractfile(crontab).read().decode()
-        self.assertEqual(contents, '\n'.join(o.config['files'][0]['contents']))
+        self.assertEqual(contents, o.config['files'][0]['contents'])
         self.assertEqual(crontab.mtime, 0)
         self.assertEqual(crontab.mode, 420)
         # second file
@@ -314,27 +312,6 @@ def test_file_inclusion(self):
         self.assertEqual(dummy.mode, 420)
         tar.close()
 
-    def test_file_inclusion_list_contents(self):
-        o = OpenWrt({
-            "files": [
-                {
-                    "path": "/root/.ssh/authorized_keys",
-                    "contents": [
-                        "key1 user@machine1",
-                        "key2 user@machine2",
-                        "key3 user@machine3",
-                    ]
-                }
-            ]
-        })
-        tar = tarfile.open(fileobj=o.generate(), mode='r')
-        self.assertEqual(len(tar.getmembers()), 1)
-        # check file
-        crontab = tar.getmember('root/.ssh/authorized_keys')
-        contents = tar.extractfile(crontab).read().decode()
-        self.assertEqual(contents, '\n'.join(o.config['files'][0]['contents']))
-        tar.close()
-
     def test_file_permissions(self):
         o = OpenWrt({
             "files": [