blah

src/viv/viv.py

@@ -21,6 +21,8 @@ import sys
 import tempfile
 import threading
 import time
+from urllib.request import urlopen
+from urllib.error import HTTPError
 import venv
 from argparse import SUPPRESS, Action
 from argparse import ArgumentParser as StdArgParser
@@ -49,7 +51,7 @@ from typing import (
     Generator,
 )
 
-__version__ = "22.12a3-41-g5c40210-dev"
+__version__ = "22.12a3-48-g30cb4b5-dev"
 
 
 @dataclass
@@ -59,9 +61,16 @@ class Config:
     venvcache: Path = (
         Path(os.getenv("XDG_CACHE_HOME", Path.home() / ".cache")) / "viv" / "venvs"
     )
+    srccache: Path = (
+        Path(os.getenv("XDG_CACHE_HOME", Path.home() / ".cache")) / "viv" / "src"
+    )
 
     def __post_init__(self) -> None:
         self.venvcache.mkdir(parents=True, exist_ok=True)
+        self.srccache.mkdir(
+            parents=True,
+            exist_ok=True,
+        )
 
 
 c = Config()
@@ -305,6 +314,16 @@ def echo(
     fd.write(output)
 
 
+def confirm(question: str) -> bool:
+    while True:
+        ans = input(question + a.style(" (Y)es/(n)o: ", "yellow")).strip().lower()
+        if ans in ("y", "yes"):
+            return True
+        elif ans in ("n", "no"):
+            return False
+        sys.stdout.write("\nPlease select (Y)es or (n)o.")
+
+
 def run(
     command: List[str],
     spinmsg: str = "",
@@ -448,7 +467,7 @@ class ViVenv:
             a.table((("key", "value"), *((k, v) for k, v in info.items())))
 
 
-def use(*packages: str, track_exe: bool = False, name: str = "") -> None:
+def use(*packages: str, track_exe: bool = False, name: str = "") -> ViVenv:
     """create a vivenv and append to sys.path
 
     Args:
@@ -467,6 +486,7 @@ def use(*packages: str, track_exe: bool = False, name: str = "") -> None:
         vivenv.dump_info(write=True)
 
     modify_sys_path(vivenv.path)
+    return vivenv
 
 
 def validate_spec(spec: Tuple[str, ...]) -> None:
@@ -515,8 +535,7 @@ STANDALONE_TEMPLATE = r"""
 # >>>>> code golfed with <3
 """  # noqa
 
-STANDALONE_TEMPLATE_USE = r"""
-def _viv_use(*pkgs: str, track_exe: bool = False, name: str = "") -> None:
+STANDALONE_TEMPLATE_USE = r"""def _viv_use(*pkgs: str, track_exe: bool = False, name: str = "") -> None:
     i,s,m,e,spec=__import__,str,map,lambda x: True if x else False,[*pkgs]
     if not {{*m(type,pkgs)}}=={{s}}: raise ValueError(f"spec: {{pkgs}} is invalid")
     ge,sys,P,ew=i("os").getenv,i("sys"),i("pathlib").Path,i("sys").stderr.write
@@ -535,9 +554,20 @@ def _viv_use(*pkgs: str, track_exe: bool = False, name: str = "") -> None:
             i("json").dump({{"created":s(i("datetime").datetime.today()),"id":_id,"spec":spec,"exe":exe}},f)
     sys.path = [p for p in (*sys.path,s(*(env/"lib").glob("py*/si*"))) if p!=i("site").USER_SITE]
 _viv_use({spec})
-"""[  # noqa
-    1:
-]
+"""  # noqa
+
+SHOW_TEMPLATE = f"""
+  {a.style('Version', 'bold')}: {{version}}
+  {a.style('CLI', 'bold')}: {{cli}}
+  {a.style('Current Source', 'bold')}: {{src}}
+"""
+
+INSTALL_TEMPLATE = f"""
+
+  Install viv.py to {a.bold}{{src_location}}{a.end}
+  Symlink {a.bold}{{src_location}}{a.end} to {a.bold}{{cli_location}}{a.end}
+
+"""
 
 
 def noqa(txt: str) -> str:
@@ -691,7 +721,7 @@ class CustomHelpFormatter(RawDescriptionHelpFormatter, HelpFormatter):
         # determine the required width and the entry label
         help_position = min(self._action_max_length + 2, self._max_help_position)
         help_width = max(self._width - help_position, 11)
-        action_width = help_position - self._current_indent - 2
+        action_width = help_position - self._current_indent
         action_header = self._format_action_invocation(action)
         action_header_len = len(a.escape(action_header))
 
@@ -763,7 +793,8 @@ class ArgumentParser(StdArgParser):
         super().__init__(*args, **kwargs)
 
         self.formatter_class = lambda prog: CustomHelpFormatter(
-            prog, max_help_position=35
+            prog,
+            max_help_position=35,
         )
 
     def error(self, message: str) -> NoReturn:
@@ -785,9 +816,43 @@ within python script:
 """
 
 
+def fetch_source(reference: str) -> str:
+    try:
+        r = urlopen(
+            "https://raw.githubusercontent.com/daylinmorgan/viv/"
+            + reference
+            + "/src/viv/viv.py"
+        )
+    except HTTPError as e:
+        error(
+            "Issue updating viv see below:"
+            + a.style("->  ", "red").join(["\n"] + repr(e).splitlines())
+        )
+        if "404" in repr(e):
+            echo("Please check your reference is valid.", style="red")
+        sys.exit(1)
+
+    src = r.read()
+    (hash := hashlib.sha256()).update(src)
+    sha256 = hash.hexdigest()
+
+    cached_src_file = c.srccache / f"{sha256}.py"
+
+    if not cached_src_file.is_file():
+        with cached_src_file.open("w") as f:
+            f.write(src.decode())
+
+    return sha256
+
+
 class Viv:
     def __init__(self) -> None:
         self.vivenvs = get_venvs()
+        self.current_source = Path(__file__).resolve()
+        self.local = not str(self.current_source).startswith("/proc/")
+        self.name = (
+            "python3 <(curl -fsSL gh.dayl.in/viv/viv.py)" if self.local else "viv"
+        )
 
     def _match_vivenv(self, name_id: str) -> ViVenv:  # type: ignore[return]
         # TODO: improve matching algorithm to favor names over id's
@@ -895,11 +960,90 @@ class Viv:
 
         vivenv.dump_info()
 
+    def manage(self, args: Namespace) -> None:
+        """manage viv installation"""
+
+        if args.cmd == "show":
+            echo("Current:")
+            sys.stdout.write(
+                SHOW_TEMPLATE.format(
+                    version=__version__,
+                    cli=shutil.which("viv"),
+                    src=Path(__file__).resolve(),
+                )
+            )
+
+        elif args.cmd == "update":
+            if not self.local:
+                error(
+                    a.style("viv manage update", "bold")
+                    + " should only be used with a locally installed viv",
+                    1,
+                )
+            #
+            # viv_src = fetch_source(args.reference)
+            #
+            # (hash := hashlib.sha256()).update(viv_src)
+            # sha256 = hash.hexdigest()
+            #
+            # (
+            #     src_cache := Path(os.getenv("XDG_CACHE_HOME", Path.home() / ".cache"))
+            #     / "viv"
+            #     / "src"
+            # ).mkdir(exist_ok=True, parents=True)
+            # cached_version = src_cache / f"{sha256}.py"
+            #
+            # if not cached_version.is_file():
+            #     with cached_version.open("w") as f:
+            #         f.write(viv_src.decode())
+            #
+            sha256 = fetch_source(args.reference)
+            sys.path.append(str(c.srccache))
+            next_version = __import__(sha256).__version__
+
+            q = (
+                "Update source at: "
+                + a.style(self.current_source, "bold")
+                + f" \n from version {__version__} to {next_version}?"
+            )
+
+            if confirm(q):
+                print("Holding off on the additions of this piece")
+
+        elif args.cmd == "install":
+            if self.local:
+                error(
+                    a.style("viv manage install", "bold")
+                    + " should only be used with a remote viv",
+                )
+                echo(
+                    "use "
+                    + a.style("viv manage update", "bold")
+                    + " to modify current installation.",
+                    style="red",
+                )
+                sys.exit(1)
+
+            sha256 = fetch_source(args.reference)
+            sys.path.append(str(c.srccache))
+            downloaded_version = __import__(sha256).__version__
+            echo(f"Downloaded version: {downloaded_version}")
+            q = INSTALL_TEMPLATE.format(
+                src_location="~/.local/share/viv/viv.py", cli_location="~/bin/viv"
+            ) + ("Would you like to perform the above " "installation steps?")
+
+            if confirm(q):
+                print("AWAY MAN")
+
     def _get_subcmd_parser(
-        self, subparsers: _SubParsersAction[ArgumentParser], name: str, **kwargs: Any
+        self,
+        subparsers: _SubParsersAction[ArgumentParser],
+        name: str,
+        attr: Optional[str] = None,
+        **kwargs: Any,
     ) -> ArgumentParser:
         aliases = kwargs.pop("aliases", [name[0]])
-        cmd = getattr(self, name)
+        cmd = getattr(self, attr if attr else name)
         parser: ArgumentParser = subparsers.add_parser(
             name,
             help=cmd.__doc__.splitlines()[0],
@@ -914,7 +1058,7 @@ class Viv:
     def cli(self) -> None:
         """cli entrypoint"""
 
-        parser = ArgumentParser(description=description)
+        parser = ArgumentParser(prog=self.name, description=description)
         parser.add_argument(
             "-V",
             "--version",
@@ -927,10 +1071,7 @@ class Viv:
         )
         p_vivenv_arg = ArgumentParser(add_help=False)
         p_vivenv_arg.add_argument("vivenv", help="name/hash of vivenv")
-        p_list = self._get_subcmd_parser(
-            subparsers,
-            "list",
-        )
+        p_list = self._get_subcmd_parser(subparsers, "list")
 
         p_list.add_argument(
             "-q",
@@ -955,16 +1096,15 @@ class Viv:
             nargs="*",
         )
 
-        p_exe_python = p_exe_sub.add_parser(
+        p_exe_sub.add_parser(
             "python",
             help="run command with python",
             parents=[p_vivenv_arg, p_exe_shared],
-        )
-        p_exe_pip = p_exe_sub.add_parser(
+        ).set_defaults(func=self.exe, exe="python")
+
+        p_exe_sub.add_parser(
             "pip", help="run command with pip", parents=[p_vivenv_arg, p_exe_shared]
-        )
-        p_exe_python.set_defaults(func=self.exe, exe="python")
-        p_exe_pip.set_defaults(func=self.exe, exe="pip")
+        ).set_defaults(func=self.exe, exe="pip")
 
         p_remove = self._get_subcmd_parser(
             subparsers,
@@ -1009,6 +1149,40 @@ class Viv:
             parents=[p_vivenv_arg],
         )
 
+        p_manage_sub = self._get_subcmd_parser(
+            subparsers, name="manage"
+        ).add_subparsers(title="subcommand", metavar="<sub-cmd>", required=True)
+
+        # TODO: shared parser?
+        (
+            p_manage_install := p_manage_sub.add_parser(
+                "install", help="install viv", aliases="i"
+            )
+        ).set_defaults(func=self.manage, cmd="install")
+        p_manage_install.add_argument(
+            "-r",
+            "--reference",
+            help="git reference (branch/tag/commit)",
+            default="main",
+        )
+
+        (
+            p_manage_update := p_manage_sub.add_parser(
+                "update", help="update viv version", aliases="u"
+            )
+        ).set_defaults(func=self.manage, cmd="update")
+
+        p_manage_update.add_argument(
+            "-r",
+            "--reference",
+            help="git reference (branch/tag/commit)",
+            default="main",
+        )
+
+        p_manage_sub.add_parser(
+            "show", help="show current installation info", aliases="s"
+        ).set_defaults(func=self.manage, cmd="show")
+
         args = parser.parse_args()
 
         args.func(args)