Drop support for python 3.6

It is being EOLed next month (https://www.python.org/dev/peps/pep-0494/)
which is when I expect the next kitty release as well

.github/workflows/ci.yml

@@ -20,15 +20,15 @@ jobs:
                 cc: [gcc, clang]
                 include:
                     - python: a
-                      pyver: 3.6
+                      pyver: 3.7
                       sanitize: 0
 
                     - python: b
-                      pyver: 3.7
+                      pyver: 3.8
                       sanitize: 1
 
                     - python: c
-                      pyver: 3.8
+                      pyver: 3.9
                       sanitize: 1
 
 

__main__.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
 
 import os

gen-apc-parsers.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPLv3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
 
 import subprocess

gen-config.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# vim:fileencoding=utf-8
 # License: GPLv3 Copyright: 2021, Kovid Goyal <kovid at kovidgoyal.net>
 
 

gen-key-constants.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# vim:fileencoding=utf-8
 # License: GPLv3 Copyright: 2021, Kovid Goyal <kovid at kovidgoyal.net>
 
 import string

gen-wcwidth.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
 
 import os
@@ -255,7 +254,7 @@ def write_case(spec: Union[Tuple[int, ...], int], p: Callable[..., None]) -> Non
     if isinstance(spec, tuple):
         p('\t\tcase 0x{:x} ... 0x{:x}:'.format(*spec))
     else:
-        p('\t\tcase 0x{:x}:'.format(spec))
+        p(f'\t\tcase 0x{spec:x}:')
 
 
 @contextmanager
@@ -353,10 +352,10 @@ def classes_to_regex(classes: Iterable[str], exclude: str = '') -> Iterable[str]
 
     def as_string(codepoint: int) -> str:
         if codepoint < 256:
-            return r'\x{:02x}'.format(codepoint)
+            return fr'\x{codepoint:02x}'
         if codepoint <= 0xffff:
-            return r'\u{:04x}'.format(codepoint)
-        return r'\U{:08x}'.format(codepoint)
+            return fr'\u{codepoint:04x}'
+        return fr'\U{codepoint:08x}'
 
     for spec in get_ranges(list(chars)):
         if isinstance(spec, tuple):

kitty/constants.py

@@ -181,24 +181,12 @@ def resolve_custom_file(path: str) -> str:
 
 
 def list_kitty_resources(package: str = 'kitty') -> Iterable[str]:
-    if sys.version_info < (3, 7):
-        from importlib_resources import files
-
-        def contents(package: str) -> Iterable[str]:
-            return (path.name for path in files(package).iterdir())
-    else:
-        from importlib.resources import contents
+    from importlib.resources import contents
     return contents(package)
 
 
 def read_kitty_resource(name: str, package_name: str = 'kitty') -> bytes:
-    if sys.version_info < (3, 7):
-        from importlib_resources import files
-
-        def read_binary(package: str, resource: str) -> bytes:
-            return (files(package) / resource).read_bytes()
-    else:
-        from importlib.resources import read_binary
+    from importlib.resources import read_binary
 
     return read_binary(package_name, name)
 

kitty_tests/main.py

@@ -8,13 +8,7 @@
 from typing import Callable, Generator, NoReturn, Sequence, Set, Iterable
 
 
-if sys.version_info < (3, 7):
-    from importlib_resources import files
-
-    def contents(package: str) -> Iterable[str]:
-        return (path.name for path in files(package).iterdir())
-else:
-    from importlib.resources import contents
+from importlib.resources import contents
 
 
 def itertests(suite: unittest.TestSuite) -> Generator[unittest.TestCase, None, None]:

publish.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
 
 import argparse
@@ -28,7 +27,7 @@
     raw = f.read()
 nv = re.search(r'^version: Version\s+=\s+Version\((\d+), (\d+), (\d+)\)', raw, flags=re.MULTILINE)
 if nv is not None:
-    version = '%s.%s.%s' % (nv.group(1), nv.group(2), nv.group(3))
+    version = f'{nv.group(1)}.{nv.group(2)}.{nv.group(3)}'
 ap = re.search(r"^appname: str\s+=\s+'([^']+)'", raw, flags=re.MULTILINE)
 if ap is not None:
     appname = ap.group(1)
@@ -68,7 +67,7 @@ def run_build(args: Any) -> None:
 def run_tag(args: Any) -> None:
     call('git push')
     call('git tag -s v{0} -m version-{0}'.format(version))
-    call('git push origin v{0}'.format(version))
+    call(f'git push origin v{version}')
 
 
 def run_man(args: Any) -> None:
@@ -197,7 +196,7 @@ def write(*args: str) -> None:
 # }}}
 
 
-class Base(object):  # {{{
+class Base:  # {{{
 
     def info(self, *args: Any, **kwargs: Any) -> None:
         print(*args, **kwargs)
@@ -293,7 +292,7 @@ def clean_older_releases(self, releases: Iterable[Dict[str, Any]]) -> None:
                           release['tag_name'])
                 for asset in release['assets']:
                     r = self.requests.delete(
-                        self.API + 'repos/%s/%s/releases/assets/%s' % (
+                        self.API + 'repos/{}/{}/releases/assets/{}'.format(
                             self.username, self.reponame, asset['id']))
                     if r.status_code != 204:
                         self.fail(
@@ -303,7 +302,7 @@ def clean_older_releases(self, releases: Iterable[Dict[str, Any]]) -> None:
 
     def do_upload(self, url: str, path: str, desc: str, fname: str) -> requests.Response:
         mime_type = mimetypes.guess_type(fname)[0] or 'application/octet-stream'
-        self.info('Uploading to GitHub: %s (%s)' % (fname, mime_type))
+        self.info(f'Uploading to GitHub: {fname} ({mime_type})')
         with ReadFileWithProgressReporting(path) as f:
             return self.requests.post(
                 url,
@@ -325,7 +324,7 @@ def already_exists(self, r: requests.Response) -> bool:
         return bool(error_code == 'already_exists')
 
     def existing_assets(self, release_id: str) -> Dict[str, str]:
-        url = self.API + 'repos/%s/%s/releases/%s/assets' % (
+        url = self.API + 'repos/{}/{}/releases/{}/assets'.format(
             self.username, self.reponame, release_id)
         r = self.requests.get(url)
         if r.status_code != 200:
@@ -341,7 +340,7 @@ def create_release(self) -> Dict[str, Any]:
             return dict(r.json())
         if self.is_nightly:
             raise SystemExit('No existing nightly release found on GitHub')
-        url = self.API + 'repos/%s/%s/releases' % (self.username, self.reponame)
+        url = self.API + f'repos/{self.username}/{self.reponame}/releases'
         r = self.requests.post(
             url,
             data=json.dumps({
@@ -413,7 +412,7 @@ def current_branch() -> str:
 
 def require_git_master(branch: str = 'master') -> None:
     if current_branch() != branch:
-        raise SystemExit('You must be in the {} git branch'.format(branch))
+        raise SystemExit(f'You must be in the {branch} git branch')
 
 
 def safe_read(path: str) -> str:
@@ -490,7 +489,7 @@ def main() -> None:
         del actions[1:]
     else:
         try:
-            ans = input('Publish version \033[91m{}\033[m (y/n): '.format(version))
+            ans = input(f'Publish version \033[91m{version}\033[m (y/n): ')
         except KeyboardInterrupt:
             ans = 'n'
         if ans.lower() != 'y':

setup.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
 
 import argparse
@@ -27,8 +26,8 @@
 from glfw import glfw
 from glfw.glfw import Command, CompileKey
 
-if sys.version_info[:2] < (3, 6):
-    raise SystemExit('kitty requires python >= 3.6')
+if sys.version_info[:2] < (3, 7):
+    raise SystemExit('kitty requires python >= 3.7')
 base = os.path.dirname(os.path.abspath(__file__))
 sys.path.insert(0, base)
 del sys.path[0]
@@ -104,7 +103,7 @@ def pkg_config(pkg: str, *args: str) -> List[str]:
             )
         )
     except subprocess.CalledProcessError:
-        raise SystemExit('The package {} was not found on your system'.format(error(pkg)))
+        raise SystemExit(f'The package {error(pkg)} was not found on your system')
 
 
 def pkg_version(package: str) -> Tuple[int, int]:
@@ -118,7 +117,7 @@ def pkg_version(package: str) -> Tuple[int, int]:
 
 
 def at_least_version(package: str, major: int, minor: int = 0) -> None:
-    q = '{}.{}'.format(major, minor)
+    q = f'{major}.{minor}'
     if subprocess.run([PKGCONFIG, package, '--atleast-version=' + q]
                       ).returncode != 0:
         qmajor = qminor = 0
@@ -185,10 +184,10 @@ def get_python_flags(cflags: List[str]) -> List[str]:
     if fw:
         for var in 'data include stdlib'.split():
             val = sysconfig.get_path(var)
-            if val and '/{}.framework'.format(fw) in val:
-                fdir = val[:val.index('/{}.framework'.format(fw))]
+            if val and f'/{fw}.framework' in val:
+                fdir = val[:val.index(f'/{fw}.framework')]
                 if os.path.isdir(
-                    os.path.join(fdir, '{}.framework'.format(fw))
+                    os.path.join(fdir, f'{fw}.framework')
                 ):
                     framework_dir = fdir
                     break
@@ -406,8 +405,8 @@ def kitty_env() -> Env:
     # We add 4000 to the primary version because vim turns on SGR mouse mode
     # automatically if this version is high enough
     cppflags = ans.cppflags
-    cppflags.append('-DPRIMARY_VERSION={}'.format(version[0] + 4000))
-    cppflags.append('-DSECONDARY_VERSION={}'.format(version[1]))
+    cppflags.append(f'-DPRIMARY_VERSION={version[0] + 4000}')
+    cppflags.append(f'-DSECONDARY_VERSION={version[1]}')
     cppflags.append('-DXT_VERSION="{}"'.format('.'.join(map(str, version))))
     at_least_version('harfbuzz', 1, 5)
     cflags.extend(pkg_config('libpng', '--cflags-only-I'))
@@ -484,7 +483,7 @@ def get_vcs_rev_defines(env: Env, src: str) -> List[str]:
                 with open(os.path.join(gitloc, 'refs/heads/master')) as f:
                     rev = f.read()
 
-        ans.append('KITTY_VCS_REV="{}"'.format(rev.strip()))
+        ans.append(f'KITTY_VCS_REV="{rev.strip()}"')
     return ans
 
 
@@ -573,9 +572,9 @@ def wait() -> None:
             if verbose:
                 print(' '.join(compile_cmd.cmd))
             elif isatty:
-                print('\r\x1b[K[{}/{}] {}'.format(num, total, compile_cmd.desc), end='')
+                print(f'\r\x1b[K[{num}/{total}] {compile_cmd.desc}', end='')
             else:
-                print('[{}/{}] {}'.format(num, total, compile_cmd.desc), flush=True)
+                print(f'[{num}/{total}] {compile_cmd.desc}', flush=True)
             printed = True
             w = subprocess.Popen(compile_cmd.cmd, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)
             workers[w.pid] = compile_cmd, w
@@ -696,12 +695,12 @@ def compile_c_extension(
         cmd = kenv.cc + ['-MMD'] + cppflags + kenv.cflags
         cmd += ['-c', src] + ['-o', dest]
         key = CompileKey(original_src, os.path.basename(dest))
-        desc = 'Compiling {} ...'.format(emphasis(desc_prefix + src))
+        desc = f'Compiling {emphasis(desc_prefix + src)} ...'
         compilation_database.add_command(desc, cmd, partial(newer, dest, *dependecies_for(src, dest, headers)), key=key, keyfile=src)
     dest = os.path.join(build_dir, module + '.so')
     real_dest = module + '.so'
     os.makedirs(os.path.dirname(dest), exist_ok=True)
-    desc = 'Linking {} ...'.format(emphasis(desc_prefix + module))
+    desc = f'Linking {emphasis(desc_prefix + module)} ...'
     # Old versions of clang don't like -pthread being passed to the linker
     # Don't treat linker warnings as errors (linker generates spurious
     # warnings on some old systems)
@@ -755,7 +754,7 @@ def compile_glfw(compilation_database: CompilationDatabase) -> None:
                 continue
         compile_c_extension(
             genv, 'kitty/glfw-' + module, compilation_database,
-            sources, all_headers, desc_prefix='[{}] '.format(module))
+            sources, all_headers, desc_prefix=f'[{module}] ')
 
 
 def kittens_env() -> Env:
@@ -784,7 +783,7 @@ def files(
     ) -> Tuple[str, List[str], List[str], str, Sequence[str], Sequence[str]]:
         sources = list(filter(filter_sources, list(extra_sources) + list_files(os.path.join('kittens', kitten, '*.c'))))
         headers = list_files(os.path.join('kittens', kitten, '*.h')) + list(extra_headers)
-        return kitten, sources, headers, 'kittens/{}/{}'.format(kitten, output), includes, libraries
+        return kitten, sources, headers, f'kittens/{kitten}/{output}', includes, libraries
 
     for kitten, sources, all_headers, dest, includes, libraries in (
         files('unicode_input', 'unicode_names'),
@@ -848,8 +847,8 @@ def build_launcher(args: Options, launcher_dir: str = '.', bundle_type: str = 's
         cflags.append('-O3')
     if bundle_type.endswith('-freeze'):
         cppflags.append('-DFOR_BUNDLE')
-        cppflags.append('-DPYVER="{}"'.format(sysconfig.get_python_version()))
-        cppflags.append('-DKITTY_LIB_DIR_NAME="{}"'.format(args.libdir_name))
+        cppflags.append(f'-DPYVER="{sysconfig.get_python_version()}"')
+        cppflags.append(f'-DKITTY_LIB_DIR_NAME="{args.libdir_name}"')
     elif bundle_type == 'source':
         cppflags.append('-DFROM_SOURCE')
     if bundle_type.startswith('macos-'):
@@ -859,8 +858,8 @@ def build_launcher(args: Options, launcher_dir: str = '.', bundle_type: str = 's
     elif bundle_type == 'source':
         klp = os.path.relpath('.', launcher_dir)
     else:
-        raise SystemExit('Unknown bundle type: {}'.format(bundle_type))
-    cppflags.append('-DKITTY_LIB_PATH="{}"'.format(klp))
+        raise SystemExit(f'Unknown bundle type: {bundle_type}')
+    cppflags.append(f'-DKITTY_LIB_PATH="{klp}"')
     pylib = get_python_flags(cflags)
     cppflags += shlex.split(os.environ.get('CPPFLAGS', ''))
     cflags += shlex.split(os.environ.get('CFLAGS', ''))

test.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
 
 import importlib