From faee70554a0e18f15676ba850d584f2d3e990c97 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Mon, 29 Mar 2021 20:08:32 -0600
Subject: debian

---
 repos/__init__.py |  3 ++-
 repos/debian.py   | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 repos/debian.py

diff --git a/repos/__init__.py b/repos/__init__.py
index 005dcf8..e5e4f98 100644
--- a/repos/__init__.py
+++ b/repos/__init__.py
@@ -1,6 +1,6 @@
 from typing import Mapping, List
 
-from . import alpine_linux, arch_linux, crates_io, homebrew
+from . import alpine_linux, arch_linux, crates_io, debian, homebrew
 from .base import Repository, slug, Version
 
 __all__ = [
@@ -17,6 +17,7 @@ all_repos: List[Repository] = [
     *repos_from(alpine_linux),
     *repos_from(arch_linux),
     *repos_from(crates_io),
+    *repos_from(debian),
     *repos_from(homebrew),
 ]
 
diff --git a/repos/debian.py b/repos/debian.py
new file mode 100644
index 0000000..6ad93fd
--- /dev/null
+++ b/repos/debian.py
@@ -0,0 +1,69 @@
+import gzip
+from pathlib import Path
+import re
+from typing import Mapping
+
+from .base import Repository, Version
+
+__all__ = [
+    'buster_main_all',
+    'buster_main_amd64',
+    'buster_contrib_all',
+    'buster_contrib_amd64',
+    'buster_non_free_all',
+    'buster_non_free_amd64',
+    'testing_main_all',
+    'testing_main_amd64',
+    'testing_contrib_all',
+    'testing_contrib_amd64',
+    'testing_non_free_all',
+    'testing_non_free_amd64',
+]
+
+PACKAGE_REVISION_INFO = re.compile(r'(\+\w+)?-\d+$')
+
+def parse_cached(cached: Path) -> Mapping[str, Version]:
+    result = dict()
+    with gzip.open(cached, mode='rt') as file:
+        this_package = None
+        this_version = None
+        for line in file:
+            line = line.strip()
+            pieces = line.split(': ', 1)
+            if len(pieces) != 2:
+                continue
+            line_type, line_data = pieces
+            if line_type == 'Package':
+                this_package = line_data
+            elif line_type == 'Version':
+                this_version = line_data
+
+            if this_package is not None and this_version is not None:
+                clean_version = PACKAGE_REVISION_INFO.sub('', this_version)
+                result[this_package] = Version(this_version, clean_version)
+                this_version = None
+                this_package = None
+    return result
+
+def build_repo(name: str, dist: str, section: str, arch: str = 'all') -> Repository:
+    url = f'https://deb.debian.org/debian/dists/{dist}/{section}/binary-{arch}/Packages.gz'
+    return Repository(
+        family='Debian',
+        repo=name,
+        index_url=url,
+        parse=parse_cached,
+    )
+
+buster_main_all = build_repo('10 - Buster (main)', 'buster', 'main')
+buster_main_amd64 = build_repo('10 - Buster (main/amd64)', 'buster', 'main', 'amd64')
+buster_contrib_all = build_repo('10 - Buster (contrib)', 'buster', 'contrib')
+buster_contrib_amd64 = build_repo('10 - Buster (contrib/amd64)', 'buster', 'contrib', 'amd64')
+buster_non_free_all = build_repo('10 - Buster (non-free)', 'buster', 'non-free')
+buster_non_free_amd64 = build_repo('10 - Buster (non-free/amd64)', 'buster', 'non-free', 'amd64')
+
+testing_main_all = build_repo('Testing (main)', 'testing', 'main')
+testing_main_amd64 = build_repo('Testing (main/amd64)', 'testing', 'main', 'amd64')
+testing_contrib_all = build_repo('Testing (contrib)', 'testing', 'contrib')
+testing_contrib_amd64 = build_repo('Testing (contrib/amd64)', 'testing', 'contrib', 'amd64')
+testing_non_free_all = build_repo('Testing (non-free)', 'testing', 'non-free')
+testing_non_free_amd64 = build_repo('Testing (non-free/amd64)', 'testing', 'non-free', 'amd64')
-- 
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