feat(metadata)!: revamp metadata tracking

This breaks any existing cache but now allows for tracking files that
access vivenv's

.github/workflows/docs.yml

@@ -22,5 +22,6 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
+          cname: viv.dayl.in 
           # publish_dir: ./site
           publish_dir: ./docs

README.md

@@ -11,7 +11,7 @@
 
 Try before you buy!
 ```sh
-python3 <(curl -fsSL gh.dayl.in/viv/viv.py) run pycowsay -- "viv isn't venv\!"
+python3 <(curl -fsSL viv.dayl.in/viv.py) run pycowsay -- "viv isn't venv\!"
 ```
 ---
 
@@ -32,7 +32,7 @@ For that reason any usage of the `CLI` can be accomplished using a remote copy a
 Run the below command to install `viv`.
 
 ```sh
-python3 <(curl -fsSL gh.dayl.in/viv/viv.py) manage install
+python3 <(curl -fsSL viv.dayl.in/viv.py) manage install
 ```
 
 To access `viv` from within scripts you should add it's location to your `PYTHONPATH`.
@@ -74,7 +74,7 @@ viv remove $(viv list -q)
 To remove `viv` all together you can use the included `purge` command:
 
 ```sh
-python3 <(curl -fsSL gh.dayl.in/viv/viv.py) manage purge
+python3 <(curl -fsSL viv.dayl.in/viv.py) manage purge
 ```
 
 ## Additional Features
@@ -87,7 +87,7 @@ After generating this a standalone `shim` you can freely use this script across
 See [examples/black](https://github.com/daylinmorgan/viv/blob/dev/examples/black) for output of below command.
 
 ```sh
-python3 <(curl -fsSL gh.dayl.in/viv/viv.py) shim black -o ./black --standalone --freeze
+python3 <(curl -fsSL viv.dayl.in/viv.py) shim black -o ./black --standalone --freeze
 ```
 
 ## Alternatives

scripts/bump-dev.sh

@@ -2,4 +2,3 @@
 TAG=$(git describe --tags --always --dirty=-dev --exclude 'latest')
 VERSION="${TAG#v}"
 sed -i "s/__version__ = \".*\"/__version__ = \"$VERSION\"/g" src/viv/viv.py
-git add src/viv/viv.py

src/viv/viv.py

@@ -9,6 +9,7 @@
 from __future__ import annotations
 
 import hashlib
+import inspect
 import itertools
 import json
 import os
@@ -31,19 +32,17 @@ from argparse import (
     _SubParsersAction,
 )
 from argparse import ArgumentParser as StdArgParser
+from dataclasses import dataclass
 from datetime import datetime
-from itertools import zip_longest
 from pathlib import Path
-from textwrap import dedent, fill, wrap
+from textwrap import dedent, fill
 from types import TracebackType
 from typing import (
     Any,
     Dict,
-    Generator,
     List,
     NoReturn,
     Optional,
-    Sequence,
     TextIO,
     Tuple,
     Type,
@@ -51,7 +50,7 @@ from typing import (
 from urllib.error import HTTPError
 from urllib.request import urlopen
 
-__version__ = "23.5a4-13-ga6bd81d-dev"
+__version__ = "23.5a4-15-gdf54955-dev"
 
 
 class Config:
@@ -149,16 +148,6 @@ class Spinner:
 class Ansi:
     """control ouptut of ansi(VT100) control codes"""
 
-    BOX: Dict[str, str] = {
-        "v": "│",
-        "h": "─",
-        "tl": "╭",
-        "tr": "╮",
-        "bl": "╰",
-        "br": "╯",
-        "sep": "┆",
-    }
-
     def __init__(self) -> None:
         self.bold: str = "\033[1m"
         self.dim: str = "\033[2m"
@@ -229,104 +218,9 @@ class Ansi:
         new_output = [f"{self.red}->{self.end} {line}" for line in output.splitlines()]
         sys.stdout.write("\n".join(new_output) + "\n")
 
-    def _get_column_sizes(
-        self, rows: Tuple[Tuple[str, Sequence[str]], ...]
-    ) -> List[int]:
-        """convert list of rows to list of columns sizes
-
-        First convert rows into list of columns,
-        then get max string length for each column.
-        """
-        return list(max(map(len, lst)) for lst in map(list, zip(*rows)))  # type: ignore
-
-    def _make_row(self, row: Generator[Any, None, None]) -> str:
-        return (
-            f"  {self.BOX['v']} "
-            + f" {self.BOX['sep']} ".join(row)
-            + f" {self.BOX['v']}"
-        )
-
-    def _sanitize_row(
-        self, sizes: List[int], row: Tuple[str, Sequence[str]]
-    ) -> Tuple[Tuple[str, Sequence[str]], ...]:
-        if len(row[1]) > sizes[1]:
-            return tuple(
-                zip_longest(
-                    (row[0],),
-                    wrap(str(row[1]), break_on_hyphens=False, width=sizes[1]),
-                    fillvalue="",
-                )
-            )
-        else:
-            return (row,)
-
     def viv_preamble(self, style: str = "magenta", sep: str = "::") -> str:
         return f"{self.cyan}viv{self.end}{self.__dict__[style]}{sep}{self.end}"
 
-    def table(
-        self, rows: Tuple[Tuple[str, Sequence[str]], ...], header_style: str = "cyan"
-    ) -> None:
-        """generate a table with outline and styled header assumes two columns
-
-        Args:
-            rows: sequence of the rows, first item assumed to be header
-            header_style: color/style for header row
-        """
-
-        sizes = self._get_column_sizes(rows)
-
-        col2_limit = shutil.get_terminal_size().columns - 20
-        if col2_limit < 20:
-            error("increase screen size to view table", code=1)
-        elif sizes[1] > col2_limit:
-            sizes[1] = col2_limit
-
-        header, rows = rows[0], rows[1:]
-        # this is maybe taking comprehensions too far....
-        table_rows = (
-            self._make_row(row)
-            for row in (
-                # header row
-                (
-                    self.__dict__[header_style] + f"{cell:<{sizes[i]}}" + self.end
-                    for i, cell in enumerate(header)
-                ),
-                # rest of the rows
-                *(
-                    (f"{cell:<{sizes[i]}}" for i, cell in enumerate(row))
-                    for row in (
-                        newrow
-                        for row in rows
-                        for newrow in self._sanitize_row(sizes, row)
-                    )
-                ),
-            )
-        )
-
-        sys.stderr.write(
-            "".join(
-                (
-                    "  ",
-                    self.BOX["tl"],
-                    self.BOX["h"] * (sum(sizes) + 5),
-                    self.BOX["tr"],
-                    "\n",
-                )
-            )
-        )
-        sys.stderr.write("\n".join(table_rows) + "\n")
-        sys.stderr.write(
-            "".join(
-                (
-                    "  ",
-                    self.BOX["bl"],
-                    self.BOX["h"] * (sum(sizes) + 5),
-                    self.BOX["br"],
-                    "\n",
-                )
-            )
-        )
-
 
 a = Ansi()
 
@@ -339,26 +233,45 @@ to create/activate a vivenv:
 - from command line: `{a.style("viv -h","bold")}`
 - within python script: {a.style('__import__("viv").use("typer", "rich-click")','bold')}
 """
+
     _standalone_func = r"""def _viv_use(*pkgs, track_exe=False, name=""):
-    T,F,N=True,False,None;i,s,m,spec=__import__,str,map,[*pkgs]
+    import hashlib, json, os, site, shutil, sys, venv  # noqa
-    e,w=lambda x: T if x else F,lambda p,t: p.write_text(t)
+    from pathlib import Path  # noqa
-    if not {*m(type,pkgs)}=={s}: raise ValueError(f"spec: {pkgs} is invalid")
+    from datetime import datetime  # noqa
-    ge,sys,P,ew=i("os").getenv,i("sys"),i("pathlib").Path,i("sys").stderr.write
+    from subprocess import run  # noqa
-    (cache:=(P(ge("XDG_CACHE_HOME",P.home()/".cache"))/"viv"/"venvs")).mkdir(parents=T,exist_ok=T)
+
-    ((sha256:=i("hashlib").sha256()).update((s(spec)+
+    if not {*map(type, pkgs)} == {str}:
-    (((exe:=("N/A",s(P(i("sys").executable).resolve()))[e(track_exe)])))).encode()))
+        raise ValueError(f"spec: {pkgs} is invalid")
-    if {env:=cache/(((_id:=sha256.hexdigest()),name)[e(name)])}-{*cache.glob("*/")} or ge("VIV_FORCE"):
+
-        v=e(ge("VIV_VERBOSE"));ew(f"generating new vivenv -> {env.name}\n")
+    meta = dict.fromkeys(("created", "accessed"), (t := str(datetime.today())))
-        i("venv").EnvBuilder(with_pip=T,clear=T).create(env)
+    runner = str(Path(__file__).absolute().resolve())
-        w(env/"pip.conf","[global]\ndisable-pip-version-check=true")
+    force, verbose, xdg = map(os.getenv, ("VIV_FORCE", "VIV_VERBOSE", "XDG_CACHE_HOME"))
-        if (rc:=(p:=i("subprocess").run([env/"bin"/"pip","install","--force-reinstall",*spec],text=T,
+    cache = (Path(xdg) if xdg else Path.home() / ".cache") / "viv" / "venvs"
-            stdout=(-1,N)[v],stderr=(-2,N)[v])).returncode)!=0:
+    cache.mkdir(parents=True, exist_ok=True)
-            if env.is_dir():i("shutil").rmtree(env)
+    exe = str(Path(sys.executable).resolve()) if track_exe else "N/A"
-            ew(f"pip had non zero exit ({rc})\n{p.stdout}\n");sys.exit(rc)
+    (sha256 := hashlib.sha256()).update((str(spec := [*pkgs]) + exe).encode())
-        w(env/"viv-info.json",i("json").dumps(
+    _id = sha256.hexdigest()
-            {"created":s(i("datetime").datetime.today()),"id":_id,"spec":spec,"exe":exe}))
+    if (env := cache / (name if name else _id)) not in cache.glob("*/") or force:
-    sys.path=[p for p in (*sys.path,s(*(env/"lib").glob("py*/si*")))if p!=i("site").USER_SITE]
+        sys.stderr.write(f"generating new vivenv -> {env.name}\n")
-    return env"""  # noqa
+        venv.EnvBuilder(with_pip=True, clear=True).create(env)
+        (env / "pip.conf").write_text("[global]\ndisable-pip-version-check=true")
+        run_kw = dict(zip(("stdout", "stderr"), ((None,) * 2 if verbose else (-1, 2))))
+        p = run([env / "bin" / "pip", "install", "--force-reinstall", *spec], **run_kw)
+        if (rc := p.returncode) != 0:
+            if env.is_dir():
+                shutil.rmtree(env)
+            sys.stderr.write(f"pip had non zero exit ({rc})\n{p.stdout.decode()}\n")
+            sys.exit(rc)
+        meta.update(dict(id=_id, spec=spec, exe=exe, name=name, files=[runner]))
+    else:
+        meta = json.loads((env / "vivmeta.json").read_text())
+        meta.update(dict(accessed=t, files=sorted({*meta["files"],runner})))
+
+    (env / "vivmeta.json").write_text(json.dumps(meta))
+    sys.path = [p for p in sys.path if not p != site.USER_SITE]
+    site.addsitedir(str(*(env / "lib").glob("py*/si*")))
+    return env
+"""
 
     def noqa(self, txt: str) -> str:
         max_length = max(map(len, txt.splitlines()))
@@ -372,16 +285,13 @@ to create/activate a vivenv:
             return f"""__import__("viv").use({spec_str})"""
 
     def standalone(self, spec: List[str]) -> str:
-        func_use = self.noqa(
+        func_use = "\n".join(
-            "\n".join((self._standalone_func, self._use_str(spec, standalone=True)))
+            (self._standalone_func, self.noqa(self._use_str(spec, standalone=True)))
         )
         return f"""
-# see `python3 <(curl -fsSL gh.dayl.in/viv/viv.py) --help`
+# see `python3 <(curl -fsSL viv.dayl.in/viv.py) --help`
-# <<<<< auto-generated by viv (v{__version__})
+# AUTOGENERATED by viv (v{__version__})
-# fmt: off
 {func_use}
-# fmt: on
-# >>>>> code golfed with <3
 """
 
     def _rel_import(self, local_source: Optional[Path]) -> str:
@@ -426,9 +336,7 @@ to create/activate a vivenv:
         bin: str,
     ) -> str:
         if standalone:
-            imports = "\n".join(
+            imports = self._standalone_func
-                ("# fmt: off", self.noqa(self._standalone_func), "# fmt: on")
-            )
         elif path == "abs":
             imports = self._absolute_import(local_source)
         elif path == "rel":
@@ -724,37 +632,78 @@ def get_hash(spec: Tuple[str, ...] | List[str], track_exe: bool = False) -> str:
     return sha256.hexdigest()
 
 
+@dataclass
+class Meta:
+    name: str
+    id: str
+    spec: List[str]
+    files: List[str]
+    exe: str
+    created: str = ""
+    accessed: str = ""
+
+    @classmethod
+    def load(cls, name: str) -> "Meta":
+        if not (c.venvcache / name / "vivmeta.json").exists():
+            warn(f"possibly corrupted vivenv: {name}")
+            # add empty values for corrupted vivenvs so it will still load
+            return cls(name=name, spec=[""], files=[""], exe="", id="")
+        else:
+            meta = json.loads((c.venvcache / name / "vivmeta.json").read_text())
+
+        return cls(**meta)
+
+    def write(self, p: Path | None = None) -> None:
+        if not p:
+            p = (c.venvcache) / self.name / "vivmeta.json"
+
+        p.write_text(json.dumps(self.__dict__))
+
+    def addfile(self, f: Path) -> None:
+        self.accessed = str(datetime.today())
+        self.files = sorted({*self.files, str(f.absolute().resolve())})
+
+
 class ViVenv:
     def __init__(
         self,
-        spec: List[str],
+        spec: List[str] = [""],
         track_exe: bool = False,
         id: str | None = None,
         name: str = "",
         path: Path | None = None,
+        skip_load: bool = False,
+        metadata: Meta | None = None,
     ) -> None:
-        self.spec = self._validate_spec(spec)
+        self.loaded = False
-        self.exe = str(Path(sys.executable).resolve()) if track_exe else "N/A"
+        spec = self._validate_spec(spec)
-        self.id = id if id else get_hash(spec, track_exe)
+        id = id if id else get_hash(spec, track_exe)
-        self.name = name if name else self.id
+
+        self.name = name if name else id
         self.path = path if path else c.venvcache / self.name
-        self.exists = self.name in [d.name for d in c.venvcache.iterdir()]
+
+        if not metadata:
+            if self.name in (d.name for d in c.venvcache.iterdir()):
+                self.loaded = True
+                self.meta = Meta.load(self.name)
+            else:
+                self.meta = Meta(
+                    spec=spec,
+                    name=self.name,
+                    id=id,
+                    files=[],
+                    exe=str(Path(sys.executable).resolve()) if track_exe else "N/A",
+                )
+        else:
+            self.meta = metadata
 
     @classmethod
     def load(cls, name: str) -> "ViVenv":
-        """generate a vivenv from a viv-info.json file
+        """generate a vivenv from a vivmeta.json
         Args:
             name: used as lookup in the vivenv cache
         """
-        if not (c.venvcache / name / "viv-info.json").is_file():
+        vivenv = cls(name=name, metadata=Meta.load(name))
-            warn(f"possibly corrupted vivenv: {name}")
-            return cls(name=name, spec=[""])
-        else:
-            with (c.venvcache / name / "viv-info.json").open("r") as f:
-                venvconfig = json.load(f)
-
-        vivenv = cls(name=name, spec=venvconfig["spec"], id=venvconfig["id"])
-        vivenv.exe = venvconfig["exe"]
 
         return vivenv
 
@@ -781,12 +730,14 @@ class ViVenv:
             with (self.path / "pip.conf").open("w") as f:
                 f.write("[global]\ndisable-pip-version-check = true")
 
+        self.meta.created = str(datetime.today())
+
     def install_pkgs(self) -> None:
         cmd: List[str] = [
             str(self.path / "bin" / "pip"),
             "install",
             "--force-reinstall",
-        ] + self.spec
+        ] + self.meta.spec
 
         run(
             cmd,
@@ -795,24 +746,57 @@ class ViVenv:
             verbose=bool(os.getenv("VIV_VERBOSE")),
         )
 
-    def dump_info(self, write: bool = False) -> None:
+    def show(self, verbose: bool = False) -> None:
-        # TODO: include associated files in 'info'
+        if not verbose:
-        # means it needs to be loaded first
+            _id = (
-        # or keep a seperate file hash in c.share?
+                self.meta.id[:8]
-        info = {
+                if self.meta.id == self.name
-            "created": str(datetime.today()),
+                else (self.name[:5] + "..." if len(self.name) > 8 else self.name)
-            "id": self.id,
+            )
-            "spec": self.spec,
-            "exe": self.exe,
-        }
 
-        # save metadata to json file
+            sys.stdout.write(
-        if write:
+                f"""{a.bold}{a.cyan}{_id}{a.end} """
-            with (self.path / "viv-info.json").open("w") as f:
+                f"""{a.style(", ".join(self.meta.spec),'dim')}\n"""
-                json.dump(info, f)
+            )
         else:
-            info["spec"] = ", ".join(self.spec)
+            self.tree()
-            a.table((("key", "value"), *((k, v) for k, v in info.items())))
+
+    def _tree_leaves(self, items: List[str], indent: str = "") -> str:
+        tree_chars = ["├"] * (len(items) - 1) + ["╰"]
+        return "\n".join(
+            (f"{indent}{a.yellow}{c}─{a.end} {i}" for c, i in zip(tree_chars, items))
+        )
+
+    def tree(self) -> None:
+        _id = self.meta.id if self.meta.id == self.name else self.name
+        # TODO: generarlize and loop this or make a template..
+        items = [
+            f"{a.magenta}{k}{a.end}: {v}"
+            for k, v in {
+                **{
+                    "spec": ", ".join(self.meta.spec),
+                    "created": self.meta.created,
+                    "accessed": self.meta.accessed,
+                },
+                **({"exe": self.meta.exe} if self.meta.exe != "N/A" else {}),
+                **({"files": ""} if self.meta.files else {}),
+            }.items()
+        ]
+        rows = [f"\n{a.bold}{a.cyan}{_id}{a.end}", self._tree_leaves(items)]
+        if self.meta.files:
+            rows += (self._tree_leaves(self.meta.files, indent="   "),)
+
+        sys.stdout.write("\n".join(rows) + "\n")
+
+
+def get_caller_path() -> Path:
+    """get callers callers file path"""
+    # viv.py is fist in stack since function is used in `viv.use()`
+    frame_info = inspect.stack()[2]
+    filepath = frame_info.filename  # in python 3.5+, you can use frame_info.filename
+    del frame_info  # drop the reference to the stack frame to avoid reference cycles
+
+    return Path(filepath).absolute()
 
 
 def use(*packages: str, track_exe: bool = False, name: str = "") -> Path:
@@ -823,26 +807,22 @@ def use(*packages: str, track_exe: bool = False, name: str = "") -> Path:
         track_exe: if true make env python exe specific
         name: use as vivenv name, if not provided id is used
     """
-    vivenv = ViVenv(list(packages), track_exe=track_exe, name=name)
 
-    if not vivenv.exists or os.getenv("VIV_FORCE"):
+    vivenv = ViVenv(list(packages), track_exe=track_exe, name=name)
+    if not vivenv.loaded or os.getenv("VIV_FORCE"):
         vivenv.create()
         vivenv.install_pkgs()
-        vivenv.dump_info(write=True)
+
+    vivenv.meta.addfile(get_caller_path())
+    vivenv.meta.write()
 
     modify_sys_path(vivenv.path)
     return vivenv.path
 
 
 def modify_sys_path(new_path: Path) -> None:
-    # remove user-site
+    sys.path = [p for p in sys.path if p is not site.USER_SITE]
-    for i, path in enumerate(sys.path):
+    site.addsitedir(str(*(new_path / "lib").glob("python*/site-packages")))
-        if path == site.USER_SITE:
-            sys.path.pop(i)
-
-    sys.path.append(
-        str([p for p in (new_path / "lib").glob("python*/site-packages")][0])
-    )
 
 
 def get_venvs() -> Dict[str, ViVenv]:
@@ -923,9 +903,7 @@ class Viv:
     def __init__(self) -> None:
         self.vivenvs = get_venvs()
         self._get_sources()
-        self.name = (
+        self.name = "viv" if self.local else "python3 <(curl -fsSL viv.dayl.in/viv.py)"
-            "viv" if self.local else "python3 <(curl -fsSL gh.dayl.in/viv/viv.py)"
-        )
 
     def _get_sources(self) -> None:
         self.local_source: Optional[Path] = None
@@ -954,7 +932,9 @@ class Viv:
         for k, v in self.vivenvs.items():
             if name_id == k or v.name == name_id:
                 matches.append(v)
-            elif k.startswith(name_id) or (v.id.startswith(name_id) and v.id == v.name):
+            elif k.startswith(name_id) or (
+                v.meta.id.startswith(name_id) and v.meta.id == v.name
+            ):
                 matches.append(v)
             elif v.name.startswith(name_id):
                 matches.append(v)
@@ -994,11 +974,10 @@ class Viv:
             # re-create env again since path's are hard-coded
             vivenv = ViVenv(spec)
 
-            if not vivenv.exists or os.getenv("VIV_FORCE"):
+            if not vivenv.loaded or os.getenv("VIV_FORCE"):
                 vivenv.create()
                 vivenv.install_pkgs()
-                vivenv.dump_info(write=True)
+                vivenv.meta.write()
-
             else:
                 echo("re-using existing vivenv")
 
@@ -1021,19 +1000,8 @@ class Viv:
         elif len(self.vivenvs) == 0:
             echo("no vivenvs setup")
         else:
-            rows = (
+            for _, vivenv in self.vivenvs.items():
-                ("vivenv", "spec"),
+                vivenv.show(args.verbose)
-                *(
-                    (
-                        f"{vivenv.name[:6]}..."
-                        if len(vivenv.name) > 9
-                        else vivenv.name,
-                        ", ".join(vivenv.spec),
-                    )
-                    for vivenv in self.vivenvs.values()
-                ),
-            )
-            a.table(rows)
 
     def exe(self, args: Namespace) -> None:
         """run python/pip in existing vivenv"""
@@ -1056,14 +1024,12 @@ class Viv:
     def info(self, args: Namespace) -> None:
         """get metadata about a vivenv"""
         vivenv = self._match_vivenv(args.vivenv)
-        metadata_file = vivenv.path / "viv-info.json"
+        metadata_file = vivenv.path / "vivmeta.json"
 
         if not metadata_file.is_file():
             error(f"Unable to find metadata for vivenv: {args.vivenv}", code=1)
 
-        echo(f"more info about {vivenv.name}:")
+        vivenv.show(verbose=True)
-
-        vivenv.dump_info()
 
     def _install_local_src(self, sha256: str, src: Path, cli: Path) -> None:
         echo("updating local source copy of viv")
@@ -1071,10 +1037,9 @@ class Viv:
         make_executable(src)
         echo("symlinking cli")
 
-        if cli.is_file() and confirm(
+        if cli.is_file():
-            f"Existing file at {a.style(str(cli),'bold')}, "
+            echo(f"Existing file at {a.style(str(cli),'bold')}")
-            "would you like to overwrite it?"
+            if confirm("Would you like to overwrite it?"):
-        ):
                 cli.unlink()
                 cli.symlink_to(src)
         else:
@@ -1172,7 +1137,7 @@ class Viv:
 
                 echo(
                     "to re-install use: "
-                    "`python3 <(curl -fsSL gh.dayl.in/viv/viv.py) manage install`"
+                    "`python3 <(curl -fsSL viv.dayl.in/viv.py) manage install`"
                 )
 
     def _pick_bin(self, args: Namespace) -> Tuple[str, str]:
@@ -1227,7 +1192,7 @@ class Viv:
         # ephemeral (default), semi-ephemeral (persist inside /tmp), or
         # persist (use c.cache)
 
-        if not vivenv.exists or os.getenv("VIV_FORCE"):
+        if not vivenv.loaded or os.getenv("VIV_FORCE"):
             if not args.keep:
                 with tempfile.TemporaryDirectory(prefix="viv-") as tmpdir:
                     vivenv.path = Path(tmpdir)
@@ -1241,7 +1206,7 @@ class Viv:
             else:
                 vivenv.create()
                 vivenv.install_pkgs()
-                vivenv.dump_info(write=True)
+                vivenv.meta.write()
 
         sys.exit(subprocess.run([vivenv.path / "bin" / bin, *args.rest]).returncode)
 
@@ -1265,7 +1230,7 @@ class Viv:
 
         return parser
 
-    def _validate_args(self, args):
+    def _validate_args(self, args: Namespace) -> None:
         if args.func.__name__ in ("freeze", "shim", "run"):
             if not args.reqs:
                 error("must specify a requirement", code=1)
@@ -1326,6 +1291,13 @@ class Viv:
         p_vivenv_arg.add_argument("vivenv", help="name/hash of vivenv")
         p_list = self._get_subcmd_parser(subparsers, "list")
 
+        p_list.add_argument(
+            "-v",
+            "--verbose",
+            help="show full metadata for vivenvs",
+            default=False,
+            action="store_true",
+        )
         p_list.add_argument(
             "-q",
             "--quiet",