Un-deprecate: This continues being useful

[pinch] / pinch.py

diff --git a/pinch.py b/pinch.py
index a66a03a5b126fd758a07242887f6090cad8fc30d..bda7633e398d12e99f018d07d27fe18d1a8f8294 100644 (file)
--- a/pinch.py
+++ b/pinch.py
@@ -1,3 +1,10 @@
+# pinch: PIN CHannels - a replacement for `nix-channel --update`
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, version 3.
+
+
 import argparse
 import configparser
 import filecmp
@@ -141,7 +148,6 @@ def symlink_archive(v: Verification, path: str) -> str:
 class AliasSearchPath(NamedTuple):
     alias_of: str
 
-    # pylint: disable=no-self-use
     def pin(self, _: Verification, __: Optional[Pin]) -> AliasPin:
         return AliasPin()
 
@@ -149,7 +155,6 @@ class AliasSearchPath(NamedTuple):
 class SymlinkSearchPath(NamedTuple):
     path: str
 
-    # pylint: disable=no-self-use
     def pin(self, _: Verification, __: Optional[Pin]) -> SymlinkPin:
         return SymlinkPin()
 
@@ -202,7 +207,6 @@ class ChannelSearchPath(NamedTuple):
             tarball_sha256=table['nixexprs.tar.xz'].digest,
             git_revision=new_gitpin.git_revision)
 
-    # pylint: disable=no-self-use
     def fetch(self, v: Verification, pin: Pin) -> str:
         assert isinstance(pin, ChannelPin)
 
@@ -262,15 +266,29 @@ def parse_channel(v: Verification, channel_html: str) \
     d = xml.dom.minidom.parseString(channel_html)
     v.ok()
 
-    v.status('Extracting release name:')
-    title_name = d.getElementsByTagName(
-        'title')[0].firstChild.nodeValue.split()[2]
-    h1_name = d.getElementsByTagName('h1')[0].firstChild.nodeValue.split()[2]
-    v.status(title_name)
-    v.result(title_name == h1_name)
-
-    v.status('Extracting git commit:')
+    v.status('Finding release name (1)')
+    title = d.getElementsByTagName('title')[0].firstChild
+    v.result(isinstance(title, xml.dom.minidom.CharacterData))
+    assert isinstance(title, xml.dom.minidom.CharacterData)
+    release_name = title.nodeValue.split()[2]
+    v.status('Finding release name (2)')
+    h1 = d.getElementsByTagName('h1')[0].firstChild
+    v.result(isinstance(h1, xml.dom.minidom.CharacterData))
+    assert isinstance(h1, xml.dom.minidom.CharacterData)
+    v.status('Verifying release name:')
+    v.status(release_name)
+    v.result(release_name == h1.nodeValue.split()[2])
+
+    v.status('Finding git commit')
     git_commit_node = d.getElementsByTagName('tt')[0]
+    v.result(
+        isinstance(
+            git_commit_node.firstChild,
+            xml.dom.minidom.CharacterData))
+    assert isinstance(
+        git_commit_node.firstChild,
+        xml.dom.minidom.CharacterData)
+    v.status('Extracting git commit:')
     git_revision = git_commit_node.firstChild.nodeValue
     v.status(git_revision)
     v.ok()
@@ -286,7 +304,7 @@ def parse_channel(v: Verification, channel_html: str) \
         digest = Digest16(row.childNodes[2].firstChild.firstChild.nodeValue)
         table[name] = ChannelTableEntry(url=url, digest=digest, size=size)
     v.ok()
-    return table, GitPin(release_name=title_name, git_revision=git_revision)
+    return table, GitPin(release_name=release_name, git_revision=git_revision)
 
 
 def digest_string(s: bytes) -> Digest16:
@@ -413,15 +431,28 @@ def compare_tarball_and_git(
         'nixpkgs',
         'programs.sqlite',
         'svn-revision']
-    benign_errors = []
+    permitted_errors = [
+        'pkgs/test/nixpkgs-check-by-name/tests/symlink-invalid/pkgs/by-name/fo/foo/foo.nix',
+    ]
+    benign_expected_errors = []
+    benign_permitted_errors = []
     for ee in expected_errors:
         if ee in errors:
             errors.remove(ee)
-            benign_errors.append(ee)
-    v.check(f'{len(errors)} unexpected incomparable files', len(errors) == 0)
+            benign_expected_errors.append(ee)
+    for pe in permitted_errors:
+        if pe in errors:
+            errors.remove(pe)
+            benign_permitted_errors.append(ee)
+    v.check(
+        f'{len(errors)} unexpected incomparable files: {errors}',
+        len(errors) == 0)
+    v.check(
+        f'({len(benign_expected_errors)} of {len(expected_errors)} expected incomparable files)',
+        len(benign_expected_errors) == len(expected_errors))
     v.check(
-        f'({len(benign_errors)} of {len(expected_errors)} expected incomparable files)',
-        len(benign_errors) == len(expected_errors))
+        f'({len(benign_permitted_errors)} of {len(permitted_errors)} permitted incomparable files)',
+        len(benign_permitted_errors) <= len(permitted_errors))
 
 
 def extract_tarball(
@@ -581,7 +612,7 @@ def read_pinned_config_section(
         section: str, conf: configparser.SectionProxy) -> Tuple[SearchPath, Pin]:
     sp, pin = read_config_section(conf)
     if pin is None:
-        raise Exception(
+        raise RuntimeError(
             f'Cannot update unpinned channel "{section}" (Run "pin" before "update")')
     return sp, pin
 
@@ -600,7 +631,7 @@ def read_config_files(
         config = read_config(file)
         for section in config.sections():
             if section in merged_config:
-                raise Exception('Duplicate channel "{section}"')
+                raise RuntimeError('Duplicate channel "{section}"')
             merged_config[section] = config[section]
     return merged_config