T1773: add a script for converting the config to JSON.

It also exposes those functions in vyos.configtree

2 files changed, 54 insertions, 0 deletions

diff --git a/python/vyos/configtree.py b/python/vyos/configtree.py
index 90716baf2..50040d957 100644
--- a/python/vyos/configtree.py
+++ b/python/vyos/configtree.py
@@ -105,6 +105,14 @@ class ConfigTree(object):
         self.__to_commands.argtypes = [c_void_p]
         self.__to_commands.restype = c_char_p
 
+        self.__to_json = self.__lib.to_json
+        self.__to_json.argtypes = [c_void_p]
+        self.__to_json.restype = c_char_p
+
+        self.__to_json_ast = self.__lib.to_json_ast
+        self.__to_json_ast.argtypes = [c_void_p]
+        self.__to_json_ast.restype = c_char_p
+
         self.__set_add_value = self.__lib.set_add_value
         self.__set_add_value.argtypes = [c_void_p, c_char_p, c_char_p]
         self.__set_add_value.restype = c_int
@@ -180,6 +188,12 @@ class ConfigTree(object):
     def to_commands(self):
         return self.__to_commands(self.__config).decode()
 
+    def to_json(self):
+        return self.__to_json(self.__config).decode()
+
+    def to_json_ast(self):
+        return self.__to_json_ast(self.__config).decode()
+
     def set(self, path, value=None, replace=True):
         check_path(path)
         path_str = " ".join(map(str, path)).encode()
diff --git a/src/utils/vyos-config-to-json b/src/utils/vyos-config-to-json
new file mode 100755
index 000000000..e03fd6a59
--- /dev/null
+++ b/src/utils/vyos-config-to-json
@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+
+import sys
+import json
+
+from signal import signal, SIGPIPE, SIG_DFL
+from vyos.configtree import ConfigTree
+
+signal(SIGPIPE,SIG_DFL)
+
+config_string = None
+if (len(sys.argv) == 1):
+    # If no argument given, act as a pipe
+    config_string = sys.stdin.read()
+else:
+    file_name = sys.argv[1]
+    try:
+        with open(file_name, 'r') as f:
+            config_string = f.read()
+    except OSError as e:
+        print("Could not read config file {0}: {1}".format(file_name, e), file=sys.stderr)
+
+# This script is usually called with the output of "cli-shell-api showCfg", which does not
+# escape backslashes. "ConfigTree()" expects escaped backslashes when parsing a config
+# string (and also prints them itself). Therefore this script would fail.
+# Manually escape backslashes here to handle backslashes in any configuration strings
+# properly. The alternative would be to modify the output of "cli-shell-api showCfg",
+# but that may be break other things who rely on that specific output.
+config_string = config_string.replace("\\", "\\\\")
+
+try:
+    config = ConfigTree(config_string)
+    json_str = config.to_json()
+    # Pretty print
+    json_str = json.dumps(json.loads(json_str), indent=4, sort_keys=True)
+except ValueError as e:
+    print("Could not parse the config file: {0}".format(e), file=sys.stderr)
+    sys.exit(1)
+
+print(json_str)