Introduce read_search_path()

[pinch] / pinch.py

diff --git a/pinch.py b/pinch.py
index 003ee70ee535d1c2b33071ceb07c096eb9830cfd..cc653daccb8aaa0d4ce74a80b685a949ab563043 100644 (file)
--- a/pinch.py
+++ b/pinch.py
@@ -50,7 +50,11 @@ class ChannelTableEntry(types.SimpleNamespace):
     url: str
 
 
-class Channel(types.SimpleNamespace):
+class SearchPath(types.SimpleNamespace):
+    release_name: str
+
+
+class Channel(SearchPath):
     alias_of: str
     channel_html: bytes
     channel_url: str
@@ -59,7 +63,6 @@ class Channel(types.SimpleNamespace):
     git_repo: str
     git_revision: str
     old_git_revision: str
-    release_name: str
     table: Dict[str, ChannelTableEntry]
 
 
@@ -83,7 +86,7 @@ class Verification:
     def result(self, r: bool) -> None:
         message, color = {True: ('OK ', 92), False: ('FAIL', 91)}[r]
         length = len(message)
-        cols = shutil.get_terminal_size().columns
+        cols = shutil.get_terminal_size().columns or 80
         pad = (cols - (self.line_length + length)) % cols
         print(' ' * pad + self._color(message, color), file=sys.stderr)
         self.line_length = 0
@@ -131,7 +134,7 @@ def fetch(v: Verification, channel: Channel) -> None:
     request = urllib.request.urlopen(channel.channel_url, timeout=10)
     channel.channel_html = request.read()
     channel.forwarded_url = request.geturl()
-    v.result(request.status == 200)
+    v.result(request.status == 200)  # type: ignore  # (for old mypy)
     v.check('Got forwarded', channel.channel_url != channel.forwarded_url)
 
 
@@ -184,7 +187,7 @@ def digest_file(filename: str) -> Digest16:
 def to_Digest16(v: Verification, digest32: Digest32) -> Digest16:
     v.status('Converting digest to base16')
     process = subprocess.run(
-        ['nix', 'to-base16', '--type', 'sha256', digest32], capture_output=True)
+        ['nix', 'to-base16', '--type', 'sha256', digest32], stdout=subprocess.PIPE)
     v.result(process.returncode == 0)
     return Digest16(process.stdout.decode().strip())
 
@@ -192,7 +195,7 @@ def to_Digest16(v: Verification, digest32: Digest32) -> Digest16:
 def to_Digest32(v: Verification, digest16: Digest16) -> Digest32:
     v.status('Converting digest to base32')
     process = subprocess.run(
-        ['nix', 'to-base32', '--type', 'sha256', digest16], capture_output=True)
+        ['nix', 'to-base32', '--type', 'sha256', digest16], stdout=subprocess.PIPE)
     v.result(process.returncode == 0)
     return Digest32(process.stdout.decode().strip())
 
@@ -203,7 +206,7 @@ def fetch_with_nix_prefetch_url(
         digest: Digest16) -> str:
     v.status('Fetching %s' % url)
     process = subprocess.run(
-        ['nix-prefetch-url', '--print-path', url, digest], capture_output=True)
+        ['nix-prefetch-url', '--print-path', url, digest], stdout=subprocess.PIPE)
     v.result(process.returncode == 0)
     prefetch_digest, path, empty = process.stdout.decode().split('\n')
     assert empty == ''
@@ -212,7 +215,7 @@ def fetch_with_nix_prefetch_url(
     v.status("Verifying file digest")
     file_digest = digest_file(path)
     v.result(file_digest == digest)
-    return path
+    return path  # type: ignore  # (for old mypy)
 
 
 def fetch_resources(v: Verification, channel: Channel) -> None:
@@ -417,13 +420,13 @@ def git_get_tarball(v: Verification, channel: Channel) -> str:
 
         v.status('Putting tarball in Nix store')
         process = subprocess.run(
-            ['nix-store', '--add', output_filename], capture_output=True)
+            ['nix-store', '--add', output_filename], stdout=subprocess.PIPE)
         v.result(process.returncode == 0)
         store_tarball = process.stdout.decode().strip()
 
         os.makedirs(os.path.dirname(cache_file), exist_ok=True)
         open(cache_file, 'w').write(store_tarball)
-        return store_tarball
+        return store_tarball  # type: ignore  # (for old mypy)
 
 
 def check_channel_metadata(
@@ -478,17 +481,22 @@ def git_revision_name(v: Verification, channel: Channel) -> str:
     process = subprocess.run(['git',
                               '-C',
                               git_cachedir(channel.git_repo),
-                              'lo',
+                              'log',
                               '-n1',
                               '--format=%ct-%h',
                               '--abbrev=11',
+                              '--no-show-signature',
                               channel.git_revision],
-                             capture_output=True)
+                             stdout=subprocess.PIPE)
     v.result(process.returncode == 0 and process.stdout != b'')
     return '%s-%s' % (os.path.basename(channel.git_repo),
                       process.stdout.decode().strip())
 
 
+def read_search_path(conf: configparser.SectionProxy) -> Channel:
+    return Channel(**dict(conf.items()))
+
+
 def read_config(filename: str) -> configparser.ConfigParser:
     config = configparser.ConfigParser()
     config.read_file(open(filename), filename)
@@ -502,7 +510,7 @@ def pin(args: argparse.Namespace) -> None:
         if args.channels and section not in args.channels:
             continue
 
-        channel = Channel(**dict(config[section].items()))
+        channel = read_search_path(config[section])
 
         if hasattr(channel, 'alias_of'):
             assert not hasattr(channel, 'git_repo')
@@ -540,7 +548,7 @@ def fetch_channel(
             v, conf['tarball_url'], Digest16(
                 conf['tarball_sha256']))
 
-    channel = Channel(**dict(conf.items()))
+    channel = read_search_path(conf)
     ensure_git_rev_available(v, channel)
     return git_get_tarball(v, channel)
 
@@ -602,4 +610,5 @@ def main() -> None:
     args.func(args)
 
 
-main()
+if __name__ == '__main__':
+    main()