Fixes parsing issue with * characters

- Quick hacky solution to solve a string quoting issue in parsing/rendering
- When our bulk conversion script is run against `aggregate`, this fix
  increases our success rate from 44% -> 58%

conda_recipe_manager/parser/_utils.py

@@ -5,7 +5,7 @@
 from __future__ import annotations
 
 import json
-from typing import cast
+from typing import Final, cast
 
 from conda_recipe_manager.parser._types import (
     RECIPE_MANAGER_SUB_MARKER,
@@ -17,6 +17,9 @@
 from conda_recipe_manager.parser.types import TAB_AS_SPACES, MultilineVariant, NodeValue
 from conda_recipe_manager.types import H, SentinelType
 
+# Commonly used special characters that we need to ensure get quoted when rendered as a YAML string.
+_TO_QUOTE_SPECIAL_CASES: Final[set[str]] = {"*"}
+
 
 def str_to_stack_path(path: str) -> StrStack:
     """
@@ -120,8 +123,10 @@ def stringify_yaml(
     # quoting all YAML strings. Although not wrong, it does not follow our common practices. Quote escaping is not
     # required for multiline strings. We do not escape quotes for Jinja value statements. We make an exception for
     # strings containing the NEW recipe format syntax, ${{ }}, which is valid YAML.
+    #
+    # In addition, there are a handful of special cases that need to be quoted in order to produce valid YAML.
     if multiline_variant == MultilineVariant.NONE and isinstance(val, str) and not Regex.JINJA_SUB.match(val):
-        if "${{" not in val and ("'" in val or '"' in val):
+        if val in _TO_QUOTE_SPECIAL_CASES or ("${{" not in val and ("'" in val or '"' in val)):
             # The PyYaml equivalent function injects newlines, hence why we abuse the JSON library to write our YAML
             return json.dumps(val)
     return val

tests/parser/test_recipe_parser.py

@@ -124,6 +124,7 @@ def test_loading_obj_in_list() -> None:
         "huggingface_hub.yaml",  # Contains a blank lines in a multiline string
         "simple-recipe_multiline_strings.yaml",  # Contains multiple multiline strings, using various operators
         "curl.yaml",  # Complex, multi-output recipe
+        "gsm-amzn2-aarch64.yaml",  # Regression test: Contains `- '*'` string that failed to parse
     ],
 )
 def test_round_trip(file: str) -> None:

tests/test_aux_files/gsm-amzn2-aarch64.yaml

@@ -0,0 +1,50 @@
+package:
+  name: gsm-amzn2-aarch64
+  version: 1.0.13
+
+source:
+  - url: https://graviton-rpms.s3.amazonaws.com/amzn2-core_2021_01_26/amzn2-core/gsm-1.0.13-11.amzn2.0.2.aarch64.rpm
+    sha256: 7700d84e3f08ac1d119e4e1b28a9b744ee130a283b8e69c1051da0cd77abab64
+    no_hoist: true
+    folder: binary
+  - url: https://graviton-rpms.s3.amazonaws.com/amzn2-core-source_2021_01_26/amzn2-core-source/gsm-1.0.13-11.amzn2.0.2.src.rpm
+    sha256: 6fc1395957fa593720a0b6a91898f946573c2ce2b898179f691407e8ecabe88d
+    no_hoist: true
+    folder: source
+
+build:
+  number: 5
+  noarch: generic
+  missing_dso_whitelist:
+    - "*"
+
+requirements:
+  build:
+    - glibc-amzn2-aarch64 ==2.26
+  host:
+    - glibc-amzn2-aarch64 ==2.26
+  run:
+    - glibc-amzn2-aarch64 ==2.26
+
+about:
+  home: http://www.quut.com/gsm/
+  license: MIT
+  license_family: MIT
+  description: |
+    Contains runtime shared libraries for libgsm, an implementation of the
+    European GSM 06.10 provisional standard for full-rate speech transcoding, prI-
+    ETS 300 036, which uses RPE/LTP (residual pulse excitation/long term
+    prediction) coding at 13 kbit/s.  GSM 06.10 compresses frames of 162 13-bit
+    samples (8 kHz sampling rate, i.e. a frame rate of 50 Hz) into 260 bits; for
+    compatibility with typical UNIX applications, our implementation turns frames
+    of 160 16-bit linear samples into 33-byte frames (1650 Bytes/s). The quality
+    of the algorithm is good enough for reliable speaker recognition; even music
+    often survives transcoding in recognizable form (given the bandwidth
+    limitations of 8 kHz sampling rate).  The interfaces offered are a front end
+    modelled after compress(1), and a library API.  Compression and decompression
+    run faster than realtime on most SPARCstations.  The implementation has been
+    verified against the ETSI standard test patterns.
+  summary: (CDT) Shared libraries for GSM speech compressor
+
+extras:
+  rpm_name: gsm