added config parsing

1 files changed, 90 insertions, 0 deletions

diff --git a/src/config.py b/src/config.py
new file mode 100644
index 0000000..ed86dc9
--- /dev/null
+++ b/src/config.py
@@ -0,0 +1,90 @@
+"""xipkg config file parser
+
+    Simple Key value, supporting map-style objects and arrays
+
+    ```
+    key      value
+    key2     another value
+
+    # this is a commment
+
+    map {
+        mapkey1 value
+        mapkey2 value
+    }
+
+    array [
+        item1
+        item2
+        item3
+        item4
+    ]
+    ```
+"""
+import sys
+# TODO: add more validation to this
+
+"""Parse a config file from a path into a python dict
+    Args:
+        file_path: (str) the path to the file
+    Returns:
+        (dict) the configuration
+    
+
+"""
+def parse_file(file_path):
+    with open(file_path, "r") as config_file:
+        return _parse_config(config_file)
+
+
+"""Parse a config file's lines, is also used for dictionaries within the config
+    Args:
+        config_file: (file) a file with the readline function
+    Returns:
+        (dict) the configuration that has been parsed
+
+"""
+def _parse_config(config_file):
+    config = {}
+    line = config_file.readline()
+    while line:
+        line = line.strip()
+        if len(line) > 0 and (line[-1] == "}" or line[-1] == "]"):
+            return config
+        else:
+            values = _parse_line(line.strip(), config_file)
+            for k,v in values.items():
+                config[k] = v
+            line = config_file.readline()
+    return config
+
+"""Parse a single config ling
+    Args:
+        line: (str) the line to be parsed
+        config_file: (file) the file that the line has been taken from
+    Returns:
+        (dict) the configuration that has been parsed from the single line
+
+"""
+def _parse_line(line, config_file):
+    if len(line) == 0:
+        return {}
+    if line[0] == "#":
+        return {}
+    else:
+        split = line.split(" ")
+        key = split[0]
+        value = " " if len(split) == 1 else " ".join(line.split(" ")[1:])
+
+        # if starting with include, then include another file in the same config
+        if key == "include":
+            included = parse_conf(value)
+            return included
+        elif value[-1].endswith("{"):
+            return {key: _parse_config(config_file)}
+        elif value[-1].endswith("["):
+            return {key: [k for k in _parse_config(config_file).keys()]}
+        else:
+            return {key: value}
+
+