README.md

@@ -129,12 +129,12 @@ python3 <(curl -fsSL viv.dayl.in/viv.py) run \
   -s https://gist.githubusercontent.com/cs01/fa721a17a326e551ede048c5088f9e0f/raw/6bdfbb6e9c1132b1c38fdd2f195d4a24c540c324/pipx-demo.py
 ```
 
-## Bonus: use `viv` with just standalone snippet (30LOC)
+## Bonus: use `viv` with just standalone snippet (37LOC)
 
 `--standalone` will auto-generate a mini-function version of `viv`
 to accomplish the same basic task as using a local copy of `viv`.
 After generating this standalone shim you can freely use this script
-across Unix machines which have Python > 3.8 and pip.
+across Unix machines which have Python > 3.8.
 See [examples/black](https://github.com/daylinmorgan/viv/blob/dev/examples/black)
 for output of the below command.
 

examples/black

@@ -1,37 +1,47 @@
 #!/usr/bin/env python3
-# AUTOGENERATED by viv (v2024.1005-dev)
+# AUTOGENERATED by viv (v2023.1001-dev)
 # see `python3 <(curl -fsSL viv.dayl.in/viv.py) --help`
 
 
 def _viv_use(*pkgs, track_exe=False, name=""):
-    i, meta, add_meta = __import__, {}, lambda **kw: meta.update(**kw)
-    P, ge, q, noop = i("pathlib").Path, i("os").getenv, i("sys").exit, lambda: None
-    _if, p_str = lambda x, f: (noop, f)[x](), lambda x: f"{P(x).absolute().resolve()}"
+    import hashlib, json, os, site, shutil, sys, venv  # noqa
+    from pathlib import Path  # noqa
+    from datetime import datetime  # noqa
+    from subprocess import run  # noqa
+
+    if not {*map(type, pkgs)} == {str}:
+        raise ValueError(f"spec: {pkgs} is invalid")
+
+    meta = dict.fromkeys(("created", "accessed"), (t := str(datetime.today())))
+    runner = str(Path(__file__).absolute().resolve())
+    envvar = lambda x: os.getenv(f"VIV_{x}")  # noqa
     nopkgs = lambda p: not p.endswith(("dist-packages", "site-packages"))  # noqa
-    _if({*map(type, spec := [*pkgs])} != {str}, lambda: q(f"spec: {pkgs} not string"))
-    F, V, NS = map(lambda x: ge(f"VIV_{x}"), ("FORCE", "VERBOSE", "NO_SETUPTOOLS"))
-    ST = not (NS and [x for x in spec if x.startswith("setuptools")])
-    add_meta(created=(now := str(i("datetime").datetime.today())))
-    base = P(xdg) if (xdg := ge("XDG_CACHE_HOME")) else P.home() / ".cache"
+    F, V, no_st = map(envvar, ("FORCE", "VERBOSE", "NO_SETUPTOOLS"))
+    base = Path(xdg) if (xdg := os.getenv("XDG_CACHE_HOME")) else Path.home() / ".cache"
     (cache := (base) / "viv/venvs").mkdir(parents=True, exist_ok=True)
-    exe = p_str(i("sys").executable) if track_exe else "N/A"
-    _id = i("hashlib").sha256((str(spec) + exe).encode()).hexdigest()
+    exe = str(Path(sys.executable).resolve()) if track_exe else "N/A"
+    _id = hashlib.sha256((str(spec := [*pkgs]) + exe).encode()).hexdigest()
     if (env := cache / (name if name else _id[:8])) not in cache.glob("*/") or F:
-        i("sys").stderr.write(f"generating new vivenv -> {env.name}\n")
-        i("venv").create(env, prompt=f"viv-{name}", symlinks=True, clear=True)
-        run_kw = dict(zip(("stdout", "stderr"), ((None,) * 2 if V else (-1, 2))))
+        sys.stderr.write(f"generating new vivenv -> {env.name}\n")
+        venv.create(env, prompt=f"viv-{name}", symlinks=True, clear=True)
+        kw = dict(zip(("stdout", "stderr"), ((None,) * 2 if V else (-1, 2))))
         cmd = ["pip", "--python", str(env / "bin" / "python"), "install", *spec]
-        _if(ST, lambda: cmd.append("setuptools"))
-        if (rc := (p := i("subprocess").run(cmd, **run_kw)).returncode) != 0:
-            _if(env.is_dir(), lambda: i("shutil").rmtree(env))
-            q(f"pip had non zero exit ({rc})\n{p.stdout.decode()}\n")
-        add_meta(id=_id, spec=spec, exe=exe, name=name)
+        if (not no_st) and (not [x for x in spec if x.startswith("setuptools")]):
+            cmd.append("setuptools")
+        p = run(cmd, **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 = i("json").loads((env / "vivmeta.json").read_text())
-    add_meta(accessed=now, files=sorted({*meta.get("files", []), p_str(__file__)}))
-    (env / "vivmeta.json").write_text(i("json").dumps(meta))
-    i("site").addsitedir(sitepkgs := str(*(env / "lib").glob("py*/si*")))
+        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))
+    site.addsitedir(sitepkgs := str(*(env / "lib").glob("py*/si*")))
     sys.path = [sitepkgs, *filter(nopkgs, sys.path)]
+
     return env
 
 
@@ -40,11 +50,11 @@ import sys
 
 if __name__ == "__main__":
     vivenv = _viv_use(
-        "black==24.4.2",
+        "black==23.7.0",
         "click==8.1.7",
         "mypy-extensions==1.0.0",
-        "packaging==24.1",  # noqa
-        "pathspec==0.12.1",
-        "platformdirs==4.2.2",
+        "packaging==23.1",  # noqa
+        "pathspec==0.11.2",
+        "platformdirs==3.10.0",
     )  # noqa
     sys.exit(subprocess.run([vivenv / "bin" / "black", *sys.argv[1:]]).returncode)

src/viv/viv.py

@@ -2008,34 +2008,44 @@ def err_quit(*msg: str, code: int = 1) -> NoReturn:
 
 class Template:
     _standalone_func = r"""def _viv_use(*pkgs, track_exe=False, name=""):
-    i, meta, add_meta = __import__, {}, lambda **kw: meta.update(**kw)
-    P, ge, q, noop = i("pathlib").Path, i("os").getenv, i("sys").exit, lambda: None
-    _if, p_str = lambda x, f: (noop, f)[x](), lambda x: f"{P(x).absolute().resolve()}"
+    import hashlib, json, os, site, shutil, sys, venv  # noqa
+    from pathlib import Path  # noqa
+    from datetime import datetime  # noqa
+    from subprocess import run  # noqa
+
+    if not {*map(type, pkgs)} == {str}:
+        raise ValueError(f"spec: {pkgs} is invalid")
+
+    meta = dict.fromkeys(("created", "accessed"), (t := str(datetime.today())))
+    runner = str(Path(__file__).absolute().resolve())
+    envvar = lambda x: os.getenv(f"VIV_{x}")  # noqa
     nopkgs = lambda p: not p.endswith(("dist-packages", "site-packages"))  # noqa
-    _if({*map(type, spec := [*pkgs])} != {str}, lambda: q(f"spec: {pkgs} not string"))
-    F, V, NS = map(lambda x: ge(f"VIV_{x}"), ("FORCE", "VERBOSE", "NO_SETUPTOOLS"))
-    ST = not (NS and [x for x in spec if x.startswith("setuptools")])
-    add_meta(created=(now := str(i("datetime").datetime.today())))
-    base = P(xdg) if (xdg := ge("XDG_CACHE_HOME")) else P.home() / ".cache"
+    F, V, no_st = map(envvar, ("FORCE", "VERBOSE", "NO_SETUPTOOLS"))
+    base = Path(xdg) if (xdg := os.getenv("XDG_CACHE_HOME")) else Path.home() / ".cache"
     (cache := (base) / "viv/venvs").mkdir(parents=True, exist_ok=True)
-    exe = p_str(i("sys").executable) if track_exe else "N/A"
-    _id = i("hashlib").sha256((str(spec) + exe).encode()).hexdigest()
+    exe = str(Path(sys.executable).resolve()) if track_exe else "N/A"
+    _id = hashlib.sha256((str(spec := [*pkgs]) + exe).encode()).hexdigest()
     if (env := cache / (name if name else _id[:8])) not in cache.glob("*/") or F:
-        i("sys").stderr.write(f"generating new vivenv -> {env.name}\n")
-        i("venv").create(env, prompt=f"viv-{name}", symlinks=True, clear=True)
-        run_kw = dict(zip(("stdout", "stderr"), ((None,) * 2 if V else (-1, 2))))
+        sys.stderr.write(f"generating new vivenv -> {env.name}\n")
+        venv.create(env, prompt=f"viv-{name}", symlinks=True, clear=True)
+        kw = dict(zip(("stdout", "stderr"), ((None,) * 2 if V else (-1, 2))))
         cmd = ["pip", "--python", str(env / "bin" / "python"), "install", *spec]
-        _if(ST, lambda: cmd.append("setuptools"))
-        if (rc := (p := i("subprocess").run(cmd, **run_kw)).returncode) != 0:
-            _if(env.is_dir(), lambda: i("shutil").rmtree(env))
-            q(f"pip had non zero exit ({rc})\n{p.stdout.decode()}\n")
-        add_meta(id=_id, spec=spec, exe=exe, name=name)
+        if (not no_st) and (not [x for x in spec if x.startswith("setuptools")]):
+            cmd.append("setuptools")
+        p = run(cmd, **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 = i("json").loads((env / "vivmeta.json").read_text())
-    add_meta(accessed=now, files=sorted({*meta.get("files", []), p_str(__file__)}))
-    (env / "vivmeta.json").write_text(i("json").dumps(meta))
-    i("site").addsitedir(sitepkgs := str(*(env / "lib").glob("py*/si*")))
+        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))
+    site.addsitedir(sitepkgs := str(*(env / "lib").glob("py*/si*")))
     sys.path = [sitepkgs, *filter(nopkgs, sys.path)]
+
     return env
 """
 
@@ -3862,7 +3872,6 @@ class Cli:
 
         self._validate_args(args)
         func = args.__dict__.pop("func")
-        _pip_check()
         func(
             **vars(args),
         )
@@ -3874,27 +3883,9 @@ def _pip_check():
         err_quit("viv requires pip to be installed")
 
     # importing viv may have side effects I'm not aware of...
-    try:
-        pip_version = __import__("pip").__version__
-    except ModuleNotFoundError:
-        cmd = ["pip", "--version"]
-        p = subprocess.run(
-            cmd,
-            text=True,
-            stderr=subprocess.STDOUT,
-            stdout=subprocess.PIPE,
-        )
-
-        if p.returncode != 0:
-            a.subprocess(cmd, p.stdout)
-            err_quit("viv failed to get version from pip, see above")
-        if not p.stdout.startswith("pip"):
-            a.subprocess(cmd, p.stdout)
-            err_quit("unexpected output from pip, see above")
-
-        pip_version = p.stdout.split()[1]
-
-    if Version(pip_version) not in SpecifierSet(pip_version_requirement):
+    if Version((pip_version := __import__("pip").__version__)) not in SpecifierSet(
+        pip_version_requirement
+    ):
         err_quit(
             f"viv requires pip version {pip_version_requirement} but got {pip_version}"
         )
@@ -3911,6 +3902,7 @@ def _no_traceback_excepthook(
 
 def main() -> None:
     try:
+        _pip_check()
         viv = Viv()
         Cli(viv).run()
     except KeyboardInterrupt:

tests/test_use.py

@@ -11,7 +11,6 @@ def test_use():
     use("pyjokes")
     import pyjokes  # noqa
 
-    # sample is installed in the test venv which should be removed from sys.path
     with pytest.raises(ImportError):
         from sample.simple import add_one  # noqa