Tabs indentation support

README.md

@@ -1,3 +1,17 @@
+## About this fork
+
+This fork adds tabs indentation support to PyYAML.
+
+Use at your own risk.
+
+Please note I'm not checking if the content is mixing tabs and spaces (which should raise an exception).
+
+Why to use tabs for indentation? Sorry, but that's a very silly question 😡
+
+Install with `pip install PyYAML_tabs`
+
+---
+
 PyYAML
 ======
 

lib/yaml/scanner.py

@@ -773,7 +773,8 @@ def scan_to_next_token(self):
             self.forward()
         found = False
         while not found:
-            while self.peek() == ' ':
+            # TODO: Throw exception when mixing spaces and tabs
+            while self.peek() in [' ', "\t"]:
                 self.forward()
             if self.peek() == '#':
                 while self.peek() not in '\0\r\n\x85\u2028\u2029':
@@ -1091,7 +1092,7 @@ def scan_block_scalar_indicators(self, start_mark):
 
     def scan_block_scalar_ignored_line(self, start_mark):
         # See the specification for details.
-        while self.peek() == ' ':
+        while self.peek() in [' ', "\t"]:
             self.forward()
         if self.peek() == '#':
             while self.peek() not in '\0\r\n\x85\u2028\u2029':
@@ -1108,8 +1109,8 @@ def scan_block_scalar_indentation(self):
         chunks = []
         max_indent = 0
         end_mark = self.get_mark()
-        while self.peek() in ' \r\n\x85\u2028\u2029':
-            if self.peek() != ' ':
+        while self.peek() in ' \t\r\n\x85\u2028\u2029':
+            if self.peek() not in [' ', "\t"]:
                 chunks.append(self.scan_line_break())
                 end_mark = self.get_mark()
             else:
@@ -1122,12 +1123,12 @@ def scan_block_scalar_breaks(self, indent):
         # See the specification for details.
         chunks = []
         end_mark = self.get_mark()
-        while self.column < indent and self.peek() == ' ':
+        while self.column < indent and self.peek() in [' ', "\t"]:
             self.forward()
         while self.peek() in '\r\n\x85\u2028\u2029':
             chunks.append(self.scan_line_break())
             end_mark = self.get_mark()
-            while self.column < indent and self.peek() == ' ':
+            while self.column < indent and self.peek() in [' ', "\t"]:
                 self.forward()
         return chunks, end_mark
 

setup.py

@@ -1,8 +1,10 @@
 
-NAME = 'PyYAML'
-VERSION = '6.0.1'
-DESCRIPTION = "YAML parser and emitter for Python"
+NAME = 'PyYAML_tabs'
+VERSION = '6.0.3'
+DESCRIPTION = "YAML parser and emitter for Python with tabs indentation support"
 LONG_DESCRIPTION = """\
+This is a fork of PyYAML with tabs indentation support.
+
 YAML is a data serialization format designed for human readability
 and interaction with scripting languages.  PyYAML is a YAML parser
 and emitter for Python.
@@ -19,7 +21,7 @@
 LICENSE = "MIT"
 PLATFORMS = "Any"
 URL = "https://pyyaml.org/"
-DOWNLOAD_URL = "https://pypi.org/project/PyYAML/"
+DOWNLOAD_URL = "https://pypi.org/project/PyYAML_tabs/"
 CLASSIFIERS = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
@@ -40,11 +42,11 @@
     "Topic :: Text Processing :: Markup",
 ]
 PROJECT_URLS = {
-   'Bug Tracker': 'https://github.com/yaml/pyyaml/issues',
-   'CI': 'https://github.com/yaml/pyyaml/actions',
+   'Bug Tracker': 'https://github.com/kripper/pyyaml_tabs/issues',
+   'CI': 'https://github.com/kripper/pyyaml_tabs/actions',
    'Documentation': 'https://pyyaml.org/wiki/PyYAMLDocumentation',
    'Mailing lists': 'http://lists.sourceforge.net/lists/listinfo/yaml-core',
-   'Source Code': 'https://github.com/yaml/pyyaml',
+   'Source Code': 'https://github.com/kripper/pyyaml_tabs',
 }
 
 LIBYAML_CHECK = """