From 3aa393bbc0cd6dd203cd69024112afc62d521581 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Fri, 12 Jun 2020 23:29:55 -0700
Subject: [PATCH 1/1] Make pin() a Channel method

---
 pinch.py | 37 ++++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/pinch.py b/pinch.py
index a8af6a6..d346a14 100644
--- a/pinch.py
+++ b/pinch.py
@@ -100,6 +100,25 @@ class Channel(SearchPath):
     old_git_revision: str
     table: Dict[str, ChannelTableEntry]
 
+    def pin(self, v: Verification, conf: configparser.SectionProxy) -> None:
+        if hasattr(self, 'alias_of'):
+            assert not hasattr(self, 'git_repo')
+            return
+
+        if hasattr(self, 'git_revision'):
+            self.old_git_revision = self.git_revision
+            del self.git_revision
+
+        if 'channel_url' in conf:
+            pin_channel(v, self)
+            conf['release_name'] = self.release_name
+            conf['tarball_url'] = self.table['nixexprs.tar.xz'].absolute_url
+            conf['tarball_sha256'] = self.table['nixexprs.tar.xz'].digest
+        else:
+            git_fetch(v, self)
+            conf['release_name'] = git_revision_name(v, self)
+        conf['git_revision'] = self.git_revision
+
 
 def compare(a: str, b: str) -> Tuple[List[str], List[str], List[str]]:
 
@@ -512,23 +531,7 @@ def pin(args: argparse.Namespace) -> None:
 
         channel = read_search_path(config[section])
 
-        if hasattr(channel, 'alias_of'):
-            assert not hasattr(channel, 'git_repo')
-            continue
-
-        if hasattr(channel, 'git_revision'):
-            channel.old_git_revision = channel.git_revision
-            del channel.git_revision
-
-        if 'channel_url' in config[section]:
-            pin_channel(v, channel)
-            config[section]['release_name'] = channel.release_name
-            config[section]['tarball_url'] = channel.table['nixexprs.tar.xz'].absolute_url
-            config[section]['tarball_sha256'] = channel.table['nixexprs.tar.xz'].digest
-        else:
-            git_fetch(v, channel)
-            config[section]['release_name'] = git_revision_name(v, channel)
-        config[section]['git_revision'] = channel.git_revision
+        channel.pin(v, config[section])
 
     with open(args.channels_file, 'w') as configfile:
         config.write(configfile)
-- 
2.44.1