Continue pulling release_name and git_revision out of SearchPath

[pinch] / pinch.py

diff --git a/pinch.py b/pinch.py
index 6f3f2567975758af3b81bc1f225706c686174525..916739d32797d6179f4ebdf553abeeb69b354f8f 100644 (file)
--- a/pinch.py
+++ b/pinch.py
@@ -25,6 +25,7 @@ from typing import (
     Mapping,
     NamedTuple,
     NewType,
     Mapping,
     NamedTuple,
     NewType,

+    Optional,

     Tuple,
     Type,
     Union,
     Tuple,
     Type,
     Union,


@@ -132,44 +133,48 @@ class TarrableSearchPath(SearchPath, ABC):  # pylint: disable=abstract-method
     forwarded_url: str
     git_ref: str
     git_repo: str
     forwarded_url: str
     git_ref: str
     git_repo: str

-    old_git_revision: str

     table: Dict[str, ChannelTableEntry]
 
 
 class GitSearchPath(TarrableSearchPath):
     def pin(self, v: Verification) -> GitPin:
     table: Dict[str, ChannelTableEntry]
 
 
 class GitSearchPath(TarrableSearchPath):
     def pin(self, v: Verification) -> GitPin:

+        old_revision = (
+            self.git_revision if hasattr(self, 'git_revision') else None)

         if hasattr(self, 'git_revision'):
         if hasattr(self, 'git_revision'):

-            self.old_git_revision = self.git_revision

             del self.git_revision
 
             del self.git_revision
 

-        git_fetch(v, self)
-        return GitPin(release_name=git_revision_name(v, self),
-                      git_revision=self.git_revision)
+        new_revision = git_fetch(v, self, None, old_revision)
+        return GitPin(release_name=git_revision_name(v, self, new_revision),
+                      git_revision=new_revision)

 
     def fetch(self, v: Verification, section: str,
               conf: configparser.SectionProxy) -> str:
 
     def fetch(self, v: Verification, section: str,
               conf: configparser.SectionProxy) -> str:

-        if 'git_repo' not in conf or 'release_name' not in conf:
+        if 'git_revision' not in conf or 'release_name' not in conf:

             raise Exception(
                 'Cannot update unpinned channel "%s" (Run "pin" before "update")' %
                 section)
             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, None)
+        return git_get_tarball(v, self, the_pin)

 
 
 class ChannelSearchPath(TarrableSearchPath):
     def pin(self, v: Verification) -> ChannelPin:
 
 
 class ChannelSearchPath(TarrableSearchPath):
     def pin(self, v: Verification) -> ChannelPin:

+        old_revision = (
+            self.git_revision if hasattr(self, 'git_revision') else None)

         if hasattr(self, 'git_revision'):
         if hasattr(self, 'git_revision'):

-            self.old_git_revision = self.git_revision

             del self.git_revision
 
         fetch(v, self)
             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, old_revision)

         check_channel_contents(v, self)
         return ChannelPin(
         check_channel_contents(v, self)
         return ChannelPin(

-            release_name=self.release_name,
+            release_name=new_gitpin.release_name,

             tarball_url=self.table['nixexprs.tar.xz'].absolute_url,
             tarball_sha256=self.table['nixexprs.tar.xz'].digest,
             git_revision=self.git_revision)
             tarball_url=self.table['nixexprs.tar.xz'].absolute_url,
             tarball_sha256=self.table['nixexprs.tar.xz'].digest,
             git_revision=self.git_revision)


@@ -225,7 +230,7 @@ def fetch(v: Verification, channel: TarrableSearchPath) -> None:
     v.check('Got forwarded', channel.channel_url != channel.forwarded_url)
 
 
     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()
     v.status('Parsing channel description as XML')
     d = xml.dom.minidom.parseString(channel.channel_html)
     v.ok()


@@ -236,7 +241,6 @@ def parse_channel(v: Verification, channel: TarrableSearchPath) -> None:
     h1_name = d.getElementsByTagName('h1')[0].firstChild.nodeValue.split()[2]
     v.status(title_name)
     v.result(title_name == h1_name)
     h1_name = d.getElementsByTagName('h1')[0].firstChild.nodeValue.split()[2]
     v.status(title_name)
     v.result(title_name == h1_name)

-    channel.release_name = title_name

 
     v.status('Extracting git commit:')
     git_commit_node = d.getElementsByTagName('tt')[0]
 
     v.status('Extracting git commit:')
     git_commit_node = d.getElementsByTagName('tt')[0]


@@ -256,6 +260,7 @@ def parse_channel(v: Verification, channel: TarrableSearchPath) -> None:
         channel.table[name] = ChannelTableEntry(
             url=url, digest=digest, size=size)
     v.ok()
         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:
 
 
 def digest_string(s: bytes) -> Digest16:


@@ -305,7 +310,10 @@ def fetch_with_nix_prefetch_url(
     return path  # type: ignore  # (for old mypy)
 
 
     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(
     for resource in ['git-revision', 'nixexprs.tar.xz']:
         fields = channel.table[resource]
         fields.absolute_url = urllib.parse.urljoin(


@@ -315,7 +323,7 @@ def fetch_resources(v: Verification, channel: ChannelSearchPath) -> None:
     v.status('Verifying git commit on main page matches git commit in table')
     v.result(
         open(
     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:
 
 
 def git_cachedir(git_repo: str) -> str:


@@ -325,17 +333,21 @@ def git_cachedir(git_repo: str) -> str:
         digest_string(git_repo.encode()))
 
 
         digest_string(git_repo.encode()))
 
 

-def tarball_cache_file(channel: TarrableSearchPath) -> str:
+def tarball_cache_file(channel: TarrableSearchPath, pin: GitPin) -> str:

     return os.path.join(
         xdg.XDG_CACHE_HOME,
         'pinch/git-tarball',
         '%s-%s-%s' %
         (digest_string(channel.git_repo.encode()),
     return os.path.join(
         xdg.XDG_CACHE_HOME,
         'pinch/git-tarball',
         '%s-%s-%s' %
         (digest_string(channel.git_repo.encode()),

-         channel.git_revision,
-         channel.release_name))
+         pin.git_revision,
+         pin.release_name))

 
 
 
 

-def verify_git_ancestry(v: Verification, channel: TarrableSearchPath) -> None:
+def verify_git_ancestry(
+        v: Verification,
+        channel: TarrableSearchPath,
+        new_revision: str,
+        old_revision: Optional[str]) -> None:

     cachedir = git_cachedir(channel.git_repo)
     v.status('Verifying rev is an ancestor of ref')
     process = subprocess.run(['git',
     cachedir = git_cachedir(channel.git_repo)
     v.status('Verifying rev is an ancestor of ref')
     process = subprocess.run(['git',


@@ -343,25 +355,29 @@ def verify_git_ancestry(v: Verification, channel: TarrableSearchPath) -> None:
                               cachedir,
                               'merge-base',
                               '--is-ancestor',
                               cachedir,
                               'merge-base',
                               '--is-ancestor',

-                              channel.git_revision,
+                              new_revision,

                               channel.git_ref])
     v.result(process.returncode == 0)
 
                               channel.git_ref])
     v.result(process.returncode == 0)
 

-    if hasattr(channel, 'old_git_revision'):
+    if old_revision is not None:

         v.status(
             'Verifying rev is an ancestor of previous rev %s' %
         v.status(
             'Verifying rev is an ancestor of previous rev %s' %

-            channel.old_git_revision)
+            old_revision)

         process = subprocess.run(['git',
                                   '-C',
                                   cachedir,
                                   'merge-base',
                                   '--is-ancestor',
         process = subprocess.run(['git',
                                   '-C',
                                   cachedir,
                                   'merge-base',
                                   '--is-ancestor',

-                                  channel.old_git_revision,
-                                  channel.git_revision])
+                                  old_revision,
+                                  new_revision])

         v.result(process.returncode == 0)
 
 
         v.result(process.returncode == 0)
 
 

-def git_fetch(v: Verification, channel: TarrableSearchPath) -> None:
+def git_fetch(
+        v: Verification,
+        channel: TarrableSearchPath,
+        desired_revision: Optional[str],
+        old_revision: Optional[str]) -> str:

     # It would be nice if we could share the nix git cache, but as of the time
     # of writing it is transitioning from gitv2 (deprecated) to gitv3 (not ready
     # yet), and trying to straddle them both is too far into nix implementation
     # It would be nice if we could share the nix git cache, but as of the time
     # of writing it is transitioning from gitv2 (deprecated) to gitv3 (not ready
     # yet), and trying to straddle them both is too far into nix implementation


@@ -387,39 +403,43 @@ def git_fetch(v: Verification, channel: TarrableSearchPath) -> None:
                                          channel.git_ref)])
     v.result(process.returncode == 0)
 
                                          channel.git_ref)])
     v.result(process.returncode == 0)
 

-    if hasattr(channel, 'git_revision'):
+    if desired_revision is not None:

         v.status('Verifying that fetch retrieved this rev')
         process = subprocess.run(
         v.status('Verifying that fetch retrieved this rev')
         process = subprocess.run(

-            ['git', '-C', cachedir, 'cat-file', '-e', channel.git_revision])
+            ['git', '-C', cachedir, 'cat-file', '-e', desired_revision])

         v.result(process.returncode == 0)
         v.result(process.returncode == 0)

-    else:
-        channel.git_revision = open(
-            os.path.join(
-                cachedir,
-                'refs',
-                'heads',
-                channel.git_ref)).read(999).strip()

 
 

-    verify_git_ancestry(v, channel)
+    new_revision = open(
+        os.path.join(
+            cachedir,
+            'refs',
+            'heads',
+            channel.git_ref)).read(999).strip()
+
+    verify_git_ancestry(v, channel, new_revision, old_revision)
+
+    return new_revision

 
 
 def ensure_git_rev_available(
         v: Verification,
 
 
 def ensure_git_rev_available(
         v: Verification,

-        channel: TarrableSearchPath) -> None:
+        channel: TarrableSearchPath,
+        pin: GitPin,
+        old_revision: Optional[str]) -> None:

     cachedir = git_cachedir(channel.git_repo)
     if os.path.exists(cachedir):
         v.status('Checking if we already have this rev:')
         process = subprocess.run(
     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:
             v.status('no')
         v.result(process.returncode == 0 or process.returncode == 1)
         if process.returncode == 0:
         if process.returncode == 0:
             v.status('yes')
         if process.returncode == 1:
             v.status('no')
         v.result(process.returncode == 0 or process.returncode == 1)
         if process.returncode == 0:

-            verify_git_ancestry(v, channel)
+            verify_git_ancestry(v, channel, pin.git_revision, old_revision)

             return
             return

-    git_fetch(v, channel)
+    git_fetch(v, channel, pin.git_revision, old_revision)

 
 
 def compare_tarball_and_git(
 
 
 def compare_tarball_and_git(


@@ -487,8 +507,11 @@ def git_checkout(
     v.result(git.returncode == 0 and tar.returncode == 0)
 
 
     v.result(git.returncode == 0 and tar.returncode == 0)
 
 

-def git_get_tarball(v: Verification, channel: TarrableSearchPath) -> str:
-    cache_file = tarball_cache_file(channel)
+def git_get_tarball(
+        v: Verification,
+        channel: TarrableSearchPath,
+        pin: GitPin) -> str:
+    cache_file = tarball_cache_file(channel, pin)

     if os.path.exists(cache_file):
         cached_tarball = open(cache_file).read(9999)
         if os.path.exists(cached_tarball):
     if os.path.exists(cache_file):
         cached_tarball = open(cache_file).read(9999)
         if os.path.exists(cached_tarball):


@@ -496,17 +519,17 @@ def git_get_tarball(v: Verification, channel: TarrableSearchPath) -> str:
 
     with tempfile.TemporaryDirectory() as output_dir:
         output_filename = os.path.join(
 
     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' %
         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',
             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()
                                    stdout=subprocess.PIPE)
             xz = subprocess.Popen(['xz'], stdin=git.stdout, stdout=output_file)
             xz.wait()


@@ -565,7 +588,10 @@ def check_channel_contents(
     v.ok()
 
 
     v.ok()
 
 

-def git_revision_name(v: Verification, channel: TarrableSearchPath) -> str:
+def git_revision_name(
+        v: Verification,
+        channel: TarrableSearchPath,
+        git_revision: str) -> str:

     v.status('Getting commit date')
     process = subprocess.run(['git',
                               '-C',
     v.status('Getting commit date')
     process = subprocess.run(['git',
                               '-C',


@@ -575,7 +601,7 @@ def git_revision_name(v: Verification, channel: TarrableSearchPath) -> str:
                               '--format=%ct-%h',
                               '--abbrev=11',
                               '--no-show-signature',
                               '--format=%ct-%h',
                               '--abbrev=11',
                               '--no-show-signature',

-                              channel.git_revision],
+                              git_revision],

                              stdout=subprocess.PIPE)
     v.result(process.returncode == 0 and process.stdout != b'')
     return '%s-%s' % (os.path.basename(channel.git_repo),
                              stdout=subprocess.PIPE)
     v.result(process.returncode == 0 and process.stdout != b'')
     return '%s-%s' % (os.path.basename(channel.git_repo),