1 files changed, 68 insertions, 0 deletions
diff --git a/repos/alpine_linux.py b/repos/alpine_linux.py
new file mode 100644
index 0000000..64f159a
--- /dev/null
+++ b/repos/alpine_linux.py
@@ -0,0 +1,68 @@
+from io import TextIOWrapper
+from pathlib import Path
+import tarfile
+from typing import Mapping, TextIO
+
+from .base import Repository
+
+__all__ = [
+    'stable_main_x86_64',
+    'stable_community_x86_64',
+    'edge_main_x86_64',
+    'edge_community_x86_64',
+    'edge_testing_x86_64',
+]
+
+def parse_apkindex(apkindex: TextIO) -> Mapping[str, str]:
+    result = dict()
+    current_package = None
+    current_version = None
+    ignore_lines = ['C', 'A', 'S', 'I', 'T', 'U', 'L', 'o', 'm', 't', 'c', 'D', 'p', 'i', 'k']
+    for line in apkindex:
+        line = line.strip()
+        if len(line) == 0:
+            if current_package is not None and current_version is not None:
+                result[current_package] = current_version
+                current_package = None
+                current_version = None
+            continue
+        try:
+            line_type, line_data = line.split(':', 1)
+        except ValueError:
+            print('what uhhhh the fuck', line, line.split(':', 1))
+            continue
+        if line_type == 'C':
+            # TODO figure out what this means
+            pass
+        elif line_type == 'P':
+            current_package = line_data
+        elif line_type == 'V':
+            current_version = line_data
+        elif line_type in ignore_lines:
+            pass
+        else:
+            raise ValueError('unknown line type: ' + line_type + ' in line ' + repr(line))
+    return result
+
+def parse_cached(cached: Path) -> Mapping[str, str]:
+    apkindex = tarfile.open(cached)
+    for archive_member in apkindex.getmembers():
+        if archive_member.name == 'APKINDEX':
+            apkindex_file = apkindex.extractfile(archive_member)
+            apkindex_file = TextIOWrapper(apkindex_file)
+            return parse_apkindex(apkindex_file)
+
+def build_repo(name: str, url_path: str):
+    url = f'http://dl-cdn.alpinelinux.org/alpine/{url_path}/APKINDEX.tar.gz'
+    return Repository(
+        family='Alpine Linux',
+        repo=name,
+        index_url=url,
+        parse=parse_cached,
+    )
+
+stable_main_x86_64 = build_repo('Stable (main/x86_64)', 'latest-stable/main/x86_64')
+stable_community_x86_64 = build_repo('Stable (community/x86_64)', 'latest-stable/community/x86_64')
+edge_main_x86_64 = build_repo('Edge (main/x86_64)', 'edge/main/x86_64')
+edge_community_x86_64 = build_repo('Edge (community/x86_64)', 'edge/community/x86_64')
+edge_testing_x86_64 = build_repo('Edge (testing/x86_64)', 'edge/testing/x86_64')