From 9343cf4818bc2b3772e46842b6703b2e9cd99e4d Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Mon, 15 Jun 2020 12:57:35 -0700
Subject: [PATCH] Start pulling release_name and git_revision out of SearchPath

---
 pinch.py | 41 ++++++++++++++++++++++++++---------------
 1 file changed, 26 insertions(+), 15 deletions(-)

diff --git a/pinch.py b/pinch.py
index 4c2341f..5e6aab9 100644
--- a/pinch.py
+++ b/pinch.py
@@ -152,9 +152,12 @@ class GitSearchPath(TarrableSearchPath):
             raise Exception(
                 'Cannot update unpinned channel "%s" (Run "pin" before "update")' %
                 section)
+        the_pin = GitPin(
+            release_name=conf['release_name'],
+            git_revision=conf['git_revision'])
 
-        ensure_git_rev_available(v, self)
-        return git_get_tarball(v, self)
+        ensure_git_rev_available(v, self, the_pin)
+        return git_get_tarball(v, self, the_pin)
 
 
 class ChannelSearchPath(TarrableSearchPath):
@@ -164,9 +167,9 @@ class ChannelSearchPath(TarrableSearchPath):
             del self.git_revision
 
         fetch(v, self)
-        parse_channel(v, self)
-        fetch_resources(v, self)
-        ensure_git_rev_available(v, self)
+        new_gitpin = parse_channel(v, self)
+        fetch_resources(v, self, new_gitpin)
+        ensure_git_rev_available(v, self, new_gitpin)
         check_channel_contents(v, self)
         return ChannelPin(
             release_name=self.release_name,
@@ -225,7 +228,7 @@ def fetch(v: Verification, channel: TarrableSearchPath) -> None:
     v.check('Got forwarded', channel.channel_url != channel.forwarded_url)
 
 
-def parse_channel(v: Verification, channel: TarrableSearchPath) -> None:
+def parse_channel(v: Verification, channel: TarrableSearchPath) -> GitPin:
     v.status('Parsing channel description as XML')
     d = xml.dom.minidom.parseString(channel.channel_html)
     v.ok()
@@ -256,6 +259,7 @@ def parse_channel(v: Verification, channel: TarrableSearchPath) -> None:
         channel.table[name] = ChannelTableEntry(
             url=url, digest=digest, size=size)
     v.ok()
+    return GitPin(release_name=title_name, git_revision=channel.git_revision)
 
 
 def digest_string(s: bytes) -> Digest16:
@@ -305,7 +309,10 @@ def fetch_with_nix_prefetch_url(
     return path  # type: ignore  # (for old mypy)
 
 
-def fetch_resources(v: Verification, channel: ChannelSearchPath) -> None:
+def fetch_resources(
+        v: Verification,
+        channel: ChannelSearchPath,
+        pin: GitPin) -> None:
     for resource in ['git-revision', 'nixexprs.tar.xz']:
         fields = channel.table[resource]
         fields.absolute_url = urllib.parse.urljoin(
@@ -315,7 +322,7 @@ def fetch_resources(v: Verification, channel: ChannelSearchPath) -> None:
     v.status('Verifying git commit on main page matches git commit in table')
     v.result(
         open(
-            channel.table['git-revision'].file).read(999) == channel.git_revision)
+            channel.table['git-revision'].file).read(999) == pin.git_revision)
 
 
 def git_cachedir(git_repo: str) -> str:
@@ -405,12 +412,13 @@ def git_fetch(v: Verification, channel: TarrableSearchPath) -> None:
 
 def ensure_git_rev_available(
         v: Verification,
-        channel: TarrableSearchPath) -> None:
+        channel: TarrableSearchPath,
+        pin: GitPin) -> None:
     cachedir = git_cachedir(channel.git_repo)
     if os.path.exists(cachedir):
         v.status('Checking if we already have this rev:')
         process = subprocess.run(
-            ['git', '-C', cachedir, 'cat-file', '-e', channel.git_revision])
+            ['git', '-C', cachedir, 'cat-file', '-e', pin.git_revision])
         if process.returncode == 0:
             v.status('yes')
         if process.returncode == 1:
@@ -487,7 +495,10 @@ def git_checkout(
     v.result(git.returncode == 0 and tar.returncode == 0)
 
 
-def git_get_tarball(v: Verification, channel: TarrableSearchPath) -> str:
+def git_get_tarball(
+        v: Verification,
+        channel: TarrableSearchPath,
+        pin: GitPin) -> str:
     cache_file = tarball_cache_file(channel)
     if os.path.exists(cache_file):
         cached_tarball = open(cache_file).read(9999)
@@ -496,17 +507,17 @@ def git_get_tarball(v: Verification, channel: TarrableSearchPath) -> str:
 
     with tempfile.TemporaryDirectory() as output_dir:
         output_filename = os.path.join(
-            output_dir, channel.release_name + '.tar.xz')
+            output_dir, pin.release_name + '.tar.xz')
         with open(output_filename, 'w') as output_file:
             v.status(
                 'Generating tarball for git revision %s' %
-                channel.git_revision)
+                pin.git_revision)
             git = subprocess.Popen(['git',
                                     '-C',
                                     git_cachedir(channel.git_repo),
                                     'archive',
-                                    '--prefix=%s/' % channel.release_name,
-                                    channel.git_revision],
+                                    '--prefix=%s/' % pin.release_name,
+                                    pin.git_revision],
                                    stdout=subprocess.PIPE)
             xz = subprocess.Popen(['xz'], stdin=git.stdout, stdout=output_file)
             xz.wait()
-- 
2.44.1