Try switching from delegator to subprocess

pipenv/cli/command.py

@@ -1,4 +1,5 @@
 import os
+from pipenv.utils import subprocess_run
 import sys
 
 from click import (
@@ -9,7 +10,7 @@ from ..__version__ import __version__
 from .._compat import fix_utf8
 from ..exceptions import PipenvOptionsError
 from ..patched import crayons
-from ..vendor import click_completion, delegator
+from ..vendor import click_completion
 from .options import (
     CONTEXT_SETTINGS, PipenvGroup, code_option, common_options, deploy_option,
     general_options, install_options, lock_options, pass_state,
@@ -641,18 +642,16 @@ def run_open(state, module, *args, **kwargs):
         three=state.three, python=state.python,
         validate=False, pypi_mirror=state.pypi_mirror,
     )
-    c = delegator.run(
-        '{0} -c "import {1}; print({1}.__file__);"'.format(which("python"), module)
+    c = subprocess_run(
+        which("python"), "-c", "import {0}; print({0}.__file__)".format(module)
     )
-    try:
-        assert c.return_code == 0
-    except AssertionError:
+    if c.returncode:
         echo(crayons.red("Module not found!"))
         sys.exit(1)
-    if "__init__.py" in c.out:
-        p = os.path.dirname(c.out.strip().rstrip("cdo"))
+    if "__init__.py" in c.stdout:
+        p = os.path.dirname(c.stdout.strip().rstrip("cdo"))
     else:
-        p = c.out.strip().rstrip("cdo")
+        p = c.stdout.strip().rstrip("cdo")
     echo(crayons.normal(f"Opening {p!r} in your EDITOR.", bold=True))
     inline_activate_virtual_environment()
     edit(filename=p)

pipenv/cmdparse.py

@@ -43,6 +43,10 @@ class Script(object):
     def args(self):
         return self._parts[1:]
 
+    @property
+    def cmd_args(self):
+        return self._parts
+
     def extend(self, extra_args):
         self._parts.extend(extra_args)
 

pipenv/core.py

@@ -8,32 +8,30 @@ import warnings
 
 import click
 
-import delegator
 import dotenv
 import pipfile
 import vistir
 
 from click_completion import init as init_completion
 
-from . import environments, exceptions, pep508checker, progress
-from ._compat import decode_for_output, fix_utf8
-from .cmdparse import Script
-from .environments import (
+from pipenv import environments, exceptions, pep508checker, progress
+from pipenv._compat import decode_for_output, fix_utf8
+from pipenv.environments import (
     PIP_EXISTS_ACTION, PIPENV_CACHE_DIR, PIPENV_COLORBLIND,
     PIPENV_DEFAULT_PYTHON_VERSION, PIPENV_DONT_USE_PYENV, PIPENV_DONT_USE_ASDF,
     PIPENV_HIDE_EMOJIS, PIPENV_MAX_SUBPROCESS, PIPENV_PYUP_API_KEY,
     PIPENV_RESOLVE_VCS, PIPENV_SHELL_FANCY, PIPENV_SKIP_VALIDATION, PIPENV_YES,
     SESSION_IS_INTERACTIVE, is_type_checking
 )
-from .patched import crayons
-from .project import Project
-from .utils import (
+from pipenv.patched import crayons
+from pipenv.project import Project
+from pipenv.utils import (
     convert_deps_to_pip, create_spinner, download_file,
     escape_grouped_arguments, find_python, find_windows_executable,
     get_canonical_names, get_source_list, interrupt_handled_subprocess,
     is_pinned, is_python_command, is_required_version, is_star, is_valid_url,
     parse_indexes, pep423_name, prepare_pip_source_args, proper_case,
-    python_version, run_command, venv_resolve_deps
+    python_version, run_command, subprocess_run, venv_resolve_deps
 )
 
 
@@ -454,7 +452,7 @@ def ensure_python(three=None, python=None):
                         else:
                             sp.ok(environments.PIPENV_SPINNER_OK_TEXT.format("Success!"))
                             # Print the results, in a beautiful blue...
-                            click.echo(crayons.cyan(c.out), err=True)
+                            click.echo(crayons.cyan(c.stdout), err=True)
                             # Clear the pythonfinder caches
                             from .vendor.pythonfinder import Finder
                             finder = Finder(system=False, global_search=True)
@@ -661,21 +659,21 @@ def do_where(virtualenv=False, bare=True):
 def _cleanup_procs(procs, failed_deps_queue, retry=True):
     while not procs.empty():
         c = procs.get()
-        if not c.blocking:
-            c.block()
+        c.wait()
         failed = False
-        if c.return_code != 0:
+        if c.returncode != 0:
             failed = True
-        if "Ignoring" in c.out:
-            click.echo(crayons.yellow(c.out.strip()))
+        out, err = c.communicate()
+        if "Ignoring" in out:
+            click.echo(crayons.yellow(out.strip()))
         elif environments.is_verbose():
-            click.echo(crayons.cyan(c.out.strip() or c.err.strip()))
+            click.echo(crayons.cyan(out.strip() or err.strip()))
         # The Installation failed...
         if failed:
             # If there is a mismatch in installed locations or the install fails
             # due to wrongful disabling of pep517, we should allow for
             # additional passes at installation
-            if "does not match installed location" in c.err:
+            if "does not match installed location" in err:
                 project.environment.expand_egg_links()
                 click.echo("{}".format(
                     crayons.yellow(
@@ -686,14 +684,14 @@ def _cleanup_procs(procs, failed_deps_queue, retry=True):
                 ))
                 dep = c.dep.copy()
                 dep.use_pep517 = True
-            elif "Disabling PEP 517 processing is invalid" in c.err:
+            elif "Disabling PEP 517 processing is invalid" in err:
                 dep = c.dep.copy()
                 dep.use_pep517 = True
             elif not retry:
                 # The Installation failed...
-                # We echo both c.out and c.err because pip returns error details on out.
-                err = c.err.strip().splitlines() if c.err else []
-                out = c.out.strip().splitlines() if c.out else []
+                # We echo both c.stdout and c.stderr because pip returns error details on out.
+                err = err.strip().splitlines() if err else []
+                out = out.strip().splitlines() if out else []
                 err_lines = [line for message in [out, err] for line in message]
                 # Return the subprocess' return code.
                 raise exceptions.InstallError(c.dep.name, extra=err_lines)
@@ -785,7 +783,7 @@ def batch_install(deps_list, procs, failed_deps_queue,
             # if dep.is_vcs or dep.editable:
             is_sequential = sequential_deps and dep.name in sequential_dep_names
             if is_sequential:
-                c.block()
+                c.wait()
 
             procs.put(c)
             if procs.full() or procs.qsize() == len(deps_list) or is_sequential:
@@ -1022,12 +1020,13 @@ def get_downloads_info(names_map, section):
         # Get the version info from the filenames.
         version = parse_download_fname(fname, name)
         # Get the hash of each file.
-        cmd = '{} hash "{}"'.format(
+        cmd = [
             escape_grouped_arguments(which_pip()),
+            "hash",
             os.sep.join([project.download_location, fname]),
-        )
-        c = delegator.run(cmd)
-        hash = c.out.split("--hash=")[1].strip()
+        ]
+        c = subprocess_run(cmd)
+        hash = c.stdout.split("--hash=")[1].strip()
         # Verify we're adding the correct version from Pipfile
         # and not one from a dependency.
         specified_version = p[section].get(name, "")
@@ -1177,17 +1176,18 @@ def do_purge(bare=False, downloads=False, allow_global=False):
             fix_utf8(f"Found {len(to_remove)} installed package(s), purging...")
         )
 
-    command = "{} uninstall {} -y".format(
+    command = [
         escape_grouped_arguments(which_pip(allow_global=allow_global)),
+        "uninstall", "-y",
         " ".join(to_remove),
-    )
+    ]
     if environments.is_verbose():
-        click.echo(f"$ {command}")
-    c = delegator.run(command)
-    if c.return_code != 0:
-        raise exceptions.UninstallError(installed, command, c.out + c.err, c.return_code)
+        click.echo(f"$ {' '.join(command)}")
+    c = subprocess_run(command)
+    if c.returncode != 0:
+        raise exceptions.UninstallError(installed, ' '.join(command), c.stdout + c.stderr, c.returncode)
     if not bare:
-        click.echo(crayons.cyan(c.out))
+        click.echo(crayons.cyan(c.stdout))
         click.echo(crayons.green("Environment now purged and fresh!"))
     return installed
 
@@ -1485,7 +1485,7 @@ def pip_install(
                 err=True,
             )
 
-    pip_command = [which_pip(allow_global=allow_global), "install"]
+    pip_command = [which("python", allow_global=allow_global), "-m", "pip", "install"]
     pip_args = get_pip_args(
         pre=pre, verbose=environments.is_verbose(), upgrade=True,
         selective_upgrade=selective_upgrade, no_use_pep517=not use_pep517,
@@ -1498,7 +1498,7 @@ def pip_install(
         pip_command.extend(line)
     pip_command.extend(prepare_pip_source_args(sources))
     if environments.is_verbose():
-        click.echo(f"$ {pip_command}", err=True)
+        click.echo(f"$ {' '.join(pip_command)}", err=True)
     cache_dir = vistir.compat.Path(PIPENV_CACHE_DIR)
     DEFAULT_EXISTS_ACTION = "w"
     if selective_upgrade:
@@ -1519,10 +1519,7 @@ def pip_install(
         pip_config.update(
             {"PIP_SRC": vistir.misc.fs_str(src_dir)}
         )
-    cmd = Script.parse(pip_command)
-    pip_command = cmd.cmdify()
-    c = None
-    c = delegator.run(pip_command, block=block, env=pip_config)
+    c = subprocess_run(pip_command, block=block, env=pip_config)
     c.env = pip_config
     return c
 
@@ -1537,14 +1534,15 @@ def pip_download(package_name):
         ),
     }
     for source in project.sources:
-        cmd = '{} download "{}" -i {} -d {}'.format(
+        cmd = [
             escape_grouped_arguments(which_pip()),
+            "download",
             package_name,
-            source["url"],
-            project.download_location,
-        )
-        c = delegator.run(cmd, env=pip_config)
-        if c.return_code == 0:
+            "-i", source["url"],
+            "-d", project.download_location,
+        ]
+        c = subprocess_run(cmd, env=pip_config)
+        if c.returncode == 0:
             break
 
     return c
@@ -1616,10 +1614,10 @@ def system_which(command, mult=False):
     })
     result = None
     try:
-        c = delegator.run(f"{_which} {command}")
+        c = subprocess_run([_which, command])
         try:
             # Which Not found...
-            if c.return_code == 127:
+            if c.returncode == 127:
                 click.echo(
                     "{}: the {} system utility is required for Pipenv to find Python installations properly."
                     "\n  Please install it.".format(
@@ -1627,7 +1625,7 @@ def system_which(command, mult=False):
                     ),
                     err=True,
                 )
-            assert c.return_code == 0
+            assert c.returncode == 0
         except AssertionError:
             result = fallback_which(command, allow_global=True)
     except TypeError:
@@ -2116,19 +2114,19 @@ def do_install(
                         extra_indexes=extra_index_url,
                         pypi_mirror=pypi_mirror,
                     )
-                    if not c.ok:
+                    if c.returncode:
                         sp.write_err(
                             "{} An error occurred while installing {}!".format(
                                 crayons.red("Error: ", bold=True), crayons.green(pkg_line)
                             ),
                         )
                         sp.write_err(
-                            vistir.compat.fs_str(f"Error text: {c.out}")
+                            vistir.compat.fs_str(f"Error text: {c.stdout}")
                         )
-                        sp.write_err(crayons.cyan(vistir.compat.fs_str(format_pip_error(c.err))))
+                        sp.write_err(crayons.cyan(vistir.compat.fs_str(format_pip_error(c.stderr))))
                         if environments.is_verbose():
-                            sp.write_err(crayons.cyan(vistir.compat.fs_str(format_pip_output(c.out))))
-                        if "setup.py egg_info" in c.err:
+                            sp.write_err(crayons.cyan(vistir.compat.fs_str(format_pip_output(c.stdout))))
+                        if "setup.py egg_info" in c.stderr:
                             sp.write_err(vistir.compat.fs_str(
                                 "This is likely caused by a bug in {}. "
                                 "Report this to its maintainers.".format(
@@ -2301,8 +2299,8 @@ def do_uninstall(
                     pip_path = which_pip(allow_global=system)
                 cmd = [pip_path, "uninstall", package_name, "-y"]
                 c = run_command(cmd)
-                click.echo(crayons.cyan(c.out))
-                if c.return_code != 0:
+                click.echo(crayons.cyan(c.stdout))
+                if c.returncode != 0:
                     failure = True
         if not failure and pipfile_remove:
             in_packages = project.get_package_name_in_pipfile(package_name, dev=False)
@@ -2611,14 +2609,14 @@ def do_check(
     # Run the PEP 508 checker in the virtualenv.
     cmd = _cmd + [vistir.compat.Path(pep508checker_path).as_posix()]
     c = run_command(cmd)
-    if c.return_code is not None:
+    if c.returncode is not None:
         try:
-            results = simplejson.loads(c.out.strip())
+            results = simplejson.loads(c.stdout.strip())
         except JSONDecodeError:
             click.echo("{}\n{}\n{}".format(
                 crayons.white(decode_for_output("Failed parsing pep508 results: "), bold=True),
-                c.out.strip(),
-                c.err.strip()
+                c.stdout.strip(),
+                c.stderr.strip()
             ))
             sys.exit(1)
     # Load the pipfile.
@@ -2681,11 +2679,11 @@ def do_check(
     c = run_command(cmd, catch_exceptions=False)
     if output == "default":
         try:
-            results = simplejson.loads(c.out)
+            results = simplejson.loads(c.stdout)
         except (ValueError, JSONDecodeError):
-            raise exceptions.JSONParseError(c.out, c.err)
+            raise exceptions.JSONParseError(c.stdout, c.stderr)
         except Exception:
-            raise exceptions.PipenvCmdError(c.cmd, c.out, c.err, c.return_code)
+            raise exceptions.PipenvCmdError(' '.join(c.args), c.stdout, c.stderr, c.returncode)
         for (package, resolved, installed, description, vuln) in results:
             click.echo(
                 "{}: {} {} resolved ({} installed)!".format(
@@ -2697,14 +2695,14 @@ def do_check(
             )
             click.echo(f"{description}")
             click.echo()
-        if c.ok:
+        if c.returncode == 0:
             click.echo(crayons.green("All good!"))
             sys.exit(0)
         else:
             sys.exit(1)
     else:
-        click.echo(c.out)
-        sys.exit(c.return_code)
+        click.echo(c.stdout)
+        sys.exit(c.returncode)
 
 
 def do_graph(bare=False, json=False, json_tree=False, reverse=False):
@@ -2786,9 +2784,9 @@ def do_graph(bare=False, json=False, json_tree=False, reverse=False):
         if json:
             data = []
             try:
-                parsed = simplejson.loads(c.out.strip())
+                parsed = simplejson.loads(c.stdout.strip())
             except JSONDecodeError:
-                raise exceptions.JSONParseError(c.out, c.err)
+                raise exceptions.JSONParseError(c.stdout, c.stderr)
             else:
                 for d in parsed:
                     if d["package"]["key"] not in BAD_PACKAGES:
@@ -2809,15 +2807,15 @@ def do_graph(bare=False, json=False, json_tree=False, reverse=False):
                     return obj
 
             try:
-                parsed = simplejson.loads(c.out.strip())
+                parsed = simplejson.loads(c.stdout.strip())
             except JSONDecodeError:
-                raise exceptions.JSONParseError(c.out, c.err)
+                raise exceptions.JSONParseError(c.stdout, c.stderr)
             else:
                 data = traverse(parsed)
                 click.echo(simplejson.dumps(data, indent=4))
                 sys.exit(0)
         else:
-            for line in c.out.strip().split("\n"):
+            for line in c.stdout.strip().split("\n"):
                 # Ignore bad packages as top level.
                 # TODO: This should probably be a "==" in + line.partition
                 if line.split("==")[0] in BAD_PACKAGES and not reverse:
@@ -2830,17 +2828,17 @@ def do_graph(bare=False, json=False, json_tree=False, reverse=False):
                 else:
                     click.echo(crayons.normal(line, bold=False))
     else:
-        click.echo(c.out)
-    if c.return_code != 0:
+        click.echo(c.stdout)
+    if c.returncode != 0:
         click.echo(
             "{} {}".format(
                 crayons.red("ERROR: ", bold=True),
-                crayons.white(f"{c.err}"),
+                crayons.white(f"{c.stderr}"),
             ),
             err=True,
         )
     # Return its return code.
-    sys.exit(c.return_code)
+    sys.exit(c.returncode)
 
 
 def do_sync(
@@ -2928,6 +2926,6 @@ def do_clean(
             # Uninstall the package.
             cmd = [which_pip(), "uninstall", apparent_bad_package, "-y"]
             c = run_command(cmd)
-            if c.return_code != 0:
+            if c.returncode != 0:
                 failure = True
     sys.exit(int(failure))

pipenv/installers.py

@@ -4,9 +4,9 @@ import re
 from abc import ABCMeta, abstractmethod
 
 
-from .environments import PIPENV_INSTALL_TIMEOUT
-from .vendor import attr, delegator
-from .utils import find_windows_executable
+from pipenv.environments import PIPENV_INSTALL_TIMEOUT
+from pipenv.vendor import attr
+from pipenv.utils import find_windows_executable, subprocess_run
 
 
 @attr.s
@@ -59,8 +59,8 @@ class InstallerNotFound(RuntimeError):
 class InstallerError(RuntimeError):
     def __init__(self, desc, c):
         super().__init__(desc)
-        self.out = c.out
-        self.err = c.err
+        self.out = c.stdout
+        self.err = c.stderr
 
 
 class Installer(metaclass=ABCMeta):
@@ -114,14 +114,13 @@ class Installer(metaclass=ABCMeta):
         raise InstallerNotFound()
 
     def _run(self, *args, **kwargs):
-        timeout = kwargs.pop('timeout', delegator.TIMEOUT)
+        timeout = kwargs.pop('timeout', 30)
         if kwargs:
             k = list(kwargs.keys())[0]
             raise TypeError(f'unexpected keyword argument {k!r}')
         args = (self.cmd,) + tuple(args)
-        c = delegator.run(args, block=False, timeout=timeout)
-        c.block()
-        if c.return_code != 0:
+        c = subprocess_run(args, timeout=timeout)
+        if c.returncode != 0:
             raise InstallerError(f'failed to run {args}', c)
         return c
 
@@ -201,7 +200,7 @@ class Asdf(Installer):
     def iter_installable_versions(self):
         """Iterate through CPython versions available for asdf to install.
         """
-        for name in self._run('list-all', 'python').out.splitlines():
+        for name in self._run('list-all', 'python').stdout.splitlines():
             try:
                 version = Version.parse(name.strip())
             except ValueError:

pipenv/utils.py

@@ -1,3 +1,4 @@
+import subprocess
 import contextlib
 import errno
 import logging
@@ -21,6 +22,7 @@ import parse
 import tomlkit
 
 from . import environments
+from ._compat import DEFAULT_ENCODING
 from .exceptions import PipenvCmdError, PipenvUsageError, RequirementError, ResolutionFailure
 from .pep508checker import lookup
 from .vendor.packaging.markers import Marker
@@ -129,7 +131,6 @@ def run_command(cmd, *args, **kwargs):
     :raises: exceptions.PipenvCmdError
     """
 
-    from pipenv.vendor import delegator
     from ._compat import decode_for_output
     from .cmdparse import Script
     catch_exceptions = kwargs.pop("catch_exceptions", True)
@@ -140,21 +141,16 @@ def run_command(cmd, *args, **kwargs):
     if "env" not in kwargs:
         kwargs["env"] = os.environ.copy()
     kwargs["env"]["PYTHONIOENCODING"] = "UTF-8"
-    try:
-        cmd_string = cmd.cmdify()
-    except TypeError:
-        click_echo(f"Error turning command into string: {cmd}", err=True)
-        sys.exit(1)
+    command = [cmd.command, *cmd.args]
     if environments.is_verbose():
-        click_echo(f"Running command: $ {cmd_string}")
-    c = delegator.run(cmd_string, *args, **kwargs)
-    return_code = c.return_code
+        click_echo(f"Running command: $ {cmd.cmdify()}")
+    c = subprocess_run(command, *args, **kwargs)
     if environments.is_verbose():
         click_echo("Command output: {}".format(
-            crayons.cyan(decode_for_output(c.out))
+            crayons.cyan(decode_for_output(c.stdout))
         ), err=True)
-    if not c.ok and catch_exceptions:
-        raise PipenvCmdError(cmd_string, c.out, c.err, return_code)
+    if c.returncode and catch_exceptions:
+        raise PipenvCmdError(cmd.cmdify(), c.stdout, c.stderr, c.returncode)
     return c
 
 
@@ -1131,50 +1127,30 @@ def create_spinner(text, nospin=None, spinner_name=None):
 
 def resolve(cmd, sp):
     from .cmdparse import Script
-    from .vendor import delegator
-    from .vendor.pexpect.exceptions import EOF, TIMEOUT
-    from .vendor.vistir.compat import to_native_string
     from .vendor.vistir.misc import echo
-    EOF.__module__ = "pexpect.exceptions"
     from ._compat import decode_output
-    c = delegator.run(Script.parse(cmd).cmdify(), block=False, env=os.environ.copy())
-    if environments.is_verbose():
-        c.subprocess.logfile = sys.stderr
-    _out = decode_output("")
-    result = None
-    out = to_native_string("")
-    while True:
-        result = None
-        try:
-            result = c.expect("\n", timeout=environments.PIPENV_INSTALL_TIMEOUT)
-        except TIMEOUT:
-            pass
-        except EOF:
-            break
-        except KeyboardInterrupt:
-            c.kill()
-            break
-        if result:
-            _out = c.subprocess.before
-            _out = decode_output(f"{_out}")
-            out += _out
-            # sp.text = to_native_string("{0}".format(_out[:100]))
-            if environments.is_verbose():
-                sp.hide_and_write(out.splitlines()[-1].rstrip())
-        else:
-            break
-    c.block()
-    if c.return_code != 0:
+    c = subprocess_run(Script.parse(cmd).cmd_args, block=False, env=os.environ.copy())
+    err = ""
+    for line in iter(c.stderr.readline, ""):
+        line = decode_output(line)
+        err += line
+        if environments.is_verbose() and line.rstrip():
+            sp.hide_and_write(line.rstrip())
+
+    c.wait()
+    returncode = c.poll()
+    out = c.stdout.read()
+    if returncode != 0:
         sp.red.fail(environments.PIPENV_SPINNER_FAIL_TEXT.format(
             "Locking Failed!"
         ))
-        echo(c.out.strip(), err=True)
+        echo(out.strip(), err=True)
         if not environments.is_verbose():
-            echo(out, err=True)
-        sys.exit(c.return_code)
+            echo(err, err=True)
+        sys.exit(returncode)
     if environments.is_verbose():
-        echo(c.err.strip(), err=True)
-    return c
+        echo(out.strip(), err=True)
+    return subprocess.CompletedProcess(c.args, returncode, out, err)
 
 
 def get_locked_dep(dep, pipfile_section, prefer_pipfile=True):
@@ -1334,21 +1310,21 @@ def venv_resolve_deps(
             os.environ["PIPENV_PACKAGES"] = str("\n".join(constraints))
             sp.write(decode_for_output("Resolving dependencies..."))
             c = resolve(cmd, sp)
-            results = c.out.strip()
-            if c.ok:
+            results = c.stdout.strip()
+            if c.returncode == 0:
                 sp.green.ok(environments.PIPENV_SPINNER_OK_TEXT.format("Success!"))
-                if not environments.is_verbose() and c.out.strip():
-                    click_echo(crayons.yellow(f"Warning: {c.out.strip()}"), err=True)
+                if not environments.is_verbose() and c.stdout.strip():
+                    click_echo(crayons.yellow(f"Warning: {c.stdout.strip()}"), err=True)
             else:
                 sp.red.fail(environments.PIPENV_SPINNER_FAIL_TEXT.format("Locking Failed!"))
-                click_echo(f"Output: {c.out.strip()}", err=True)
-                click_echo(f"Error: {c.err.strip()}", err=True)
+                click_echo(f"Output: {c.stdout.strip()}", err=True)
+                click_echo(f"Error: {c.stderr.strip()}", err=True)
     try:
         with open(target_file.name) as fh:
             results = json.load(fh)
     except (IndexError, JSONDecodeError):
-        click_echo(c.out.strip(), err=True)
-        click_echo(c.err.strip(), err=True)
+        click_echo(c.stdout.strip(), err=True)
+        click_echo(c.stderr.strip(), err=True)
         if os.path.exists(target_file.name):
             os.unlink(target_file.name)
         raise RuntimeError("There was a problem with locking.")
@@ -1723,14 +1699,13 @@ def temp_path():
 
 
 def load_path(python):
-    from ._compat import Path
-    import delegator
+    from pathlib import Path
     import json
     python = Path(python).as_posix()
     json_dump_commmand = '"import json, sys; print(json.dumps(sys.path));"'
-    c = delegator.run(f'"{python}" -c {json_dump_commmand}')
-    if c.return_code == 0:
-        return json.loads(c.out.strip())
+    c = subprocess_run([python, "-c", json_dump_commmand])
+    if c.returncode == 0:
+        return json.loads(c.stdout.strip())
     else:
         return []
 
@@ -2248,35 +2223,6 @@ def is_python_command(line):
     return False
 
 
-# def make_marker_from_specifier(spec):
-#     # type: (str) -> Optional[Marker]
-#     """Given a python version specifier, create a marker
-
-#     :param spec: A specifier
-#     :type spec: str
-#     :return: A new marker
-#     :rtype: Optional[:class:`packaging.marker.Marker`]
-#     """
-#     from .vendor.packaging.markers import Marker
-#     from .vendor.packaging.specifiers import SpecifierSet, Specifier
-#     from .vendor.requirementslib.models.markers import cleanup_pyspecs, format_pyversion
-#     if not any(spec.startswith(k) for k in Specifier._operators.keys()):
-#         if spec.strip().lower() in ["any", "<any>", "*"]:
-#             return None
-#         spec = "=={0}".format(spec)
-#     elif spec.startswith("==") and spec.count("=") > 3:
-#         spec = "=={0}".format(spec.lstrip("="))
-#     if not spec:
-#         return None
-#     marker_segments = []
-#     print(spec)
-#     for marker_segment in cleanup_pyspecs(spec):
-#         print(marker_segment)
-#         marker_segments.append(format_pyversion(marker_segment))
-#     marker_str = " and ".join(marker_segments)
-#     return Marker(marker_str)
-
-
 @contextlib.contextmanager
 def interrupt_handled_subprocess(
     cmd, verbose=False, return_object=True, write_to_stdout=False, combine_stderr=True,
@@ -2312,3 +2258,30 @@ def interrupt_handled_subprocess(
             os.kill(obj.pid, signal.SIGINT)
         obj.wait()
         raise
+
+
+def subprocess_run(
+    args, *, block=True, text=True, capture_output=True,
+    encoding=DEFAULT_ENCODING, env=None, **other_kwargs
+):
+    """A backward compatible version of subprocess.run().
+
+    It outputs text with default encoding, and store all outputs in the returned object instead of
+    printing onto stdout.
+    """
+    if env is not None:
+        env = dict(os.environ, **env)
+        other_kwargs['env'] = env
+    if block:
+        return subprocess.run(
+            args, universal_newlines=text, capture_output=capture_output,
+            encoding=encoding, **other_kwargs
+        )
+    else:
+        if capture_output:
+            other_kwargs['stdout'] = subprocess.PIPE
+            other_kwargs['stderr'] = subprocess.PIPE
+        return subprocess.Popen(
+            args, universal_newlines=text,
+            encoding=encoding, **other_kwargs
+        )

pipenv/vendor/delegator.py

@@ -1,341 +0,0 @@
-import os
-import subprocess
-import shlex
-import signal
-import sys
-import locale
-import errno
-
-from pexpect.popen_spawn import PopenSpawn
-import pexpect
-pexpect.EOF.__module__ = "pexpect.exceptions"
-
-# Include `unicode` in STR_TYPES for Python 2.X
-try:
-    STR_TYPES = (str, unicode)
-except NameError:
-    STR_TYPES = (str,)
-
-TIMEOUT = 30
-
-
-def pid_exists(pid):
-    """Check whether pid exists in the current process table."""
-    if pid == 0:
-        # According to "man 2 kill" PID 0 has a special meaning:
-        # it refers to <<every process in the process group of the
-        # calling process>> so we don't want to go any further.
-        # If we get here it means this UNIX platform *does* have
-        # a process with id 0.
-        return True
-    try:
-        os.kill(pid, 0)
-    except OSError as err:
-        if err.errno == errno.ESRCH:
-            # ESRCH == No such process
-            return False
-        elif err.errno == errno.EPERM:
-            # EPERM clearly means there's a process to deny access to
-            return True
-        else:
-            # According to "man 2 kill" possible error values are
-            # (EINVAL, EPERM, ESRCH) therefore we should never get
-            # here. If we do let's be explicit in considering this
-            # an error.
-            raise err
-    else:
-        return True
-
-
-class Command(object):
-    def __init__(self, cmd, timeout=TIMEOUT):
-        super(Command, self).__init__()
-        self.cmd = cmd
-        self.timeout = timeout
-        self.subprocess = None
-        self.blocking = None
-        self.was_run = False
-        self.__out = None
-        self.__err = None
-
-    def __repr__(self):
-        return "<Command {!r}>".format(self.cmd)
-
-    @property
-    def _popen_args(self):
-        return self.cmd
-
-    @property
-    def _default_popen_kwargs(self):
-        return {
-            "env": os.environ.copy(),
-            "stdin": subprocess.PIPE,
-            "stdout": subprocess.PIPE,
-            "stderr": subprocess.PIPE,
-            "shell": True,
-            "universal_newlines": True,
-            "bufsize": 0,
-        }
-
-    @property
-    def _default_pexpect_kwargs(self):
-        encoding = "utf-8"
-        if sys.platform == "win32":
-            default_encoding = locale.getdefaultlocale()[1]
-            if default_encoding is not None:
-                encoding = default_encoding
-        return {"env": os.environ.copy(), "encoding": encoding, "timeout": self.timeout}
-
-    @property
-    def _uses_subprocess(self):
-        return isinstance(self.subprocess, subprocess.Popen)
-
-    @property
-    def _uses_pexpect(self):
-        return isinstance(self.subprocess, PopenSpawn)
-
-    @property
-    def std_out(self):
-        return self.subprocess.stdout
-
-    @property
-    def ok(self):
-        return self.return_code == 0
-
-    @property
-    def _pexpect_out(self):
-        if self.subprocess.encoding:
-            result = ""
-        else:
-            result = b""
-
-        if self.subprocess.before:
-            result += self.subprocess.before
-
-        if self.subprocess.after and self.subprocess.after not in (pexpect.EOF, pexpect.TIMEOUT):
-            try:
-                result += self.subprocess.after
-            except (pexpect.EOF, pexpect.TIMEOUT):
-                pass
-
-        result += self.subprocess.read()
-        return result
-
-    @property
-    def out(self):
-        """Std/out output (cached)"""
-        if self.__out is not None:
-            return self.__out
-
-        if self._uses_subprocess:
-            self.__out = self.std_out.read()
-        else:
-            self.__out = self._pexpect_out
-
-        return self.__out
-
-    @property
-    def std_err(self):
-        return self.subprocess.stderr
-
-    @property
-    def err(self):
-        """Std/err output (cached)"""
-        if self.__err is not None:
-            return self.__err
-
-        if self._uses_subprocess:
-            self.__err = self.std_err.read()
-            return self.__err
-        else:
-            return self._pexpect_out
-
-    @property
-    def pid(self):
-        """The process' PID."""
-        # Support for pexpect's functionality.
-        if hasattr(self.subprocess, "proc"):
-            return self.subprocess.proc.pid
-        # Standard subprocess method.
-        return self.subprocess.pid
-
-    @property
-    def is_alive(self):
-        """Is the process alive?"""
-        return pid_exists(self.pid)
-
-    @property
-    def return_code(self):
-        # Support for pexpect's functionality.
-        if self._uses_pexpect:
-            return self.subprocess.exitstatus
-        # Standard subprocess method.
-        return self.subprocess.returncode
-
-    @property
-    def std_in(self):
-        return self.subprocess.stdin
-
-    def run(self, block=True, binary=False, cwd=None, env=None):
-        """Runs the given command, with or without pexpect functionality enabled."""
-        self.blocking = block
-
-        # Use subprocess.
-        if self.blocking:
-            popen_kwargs = self._default_popen_kwargs.copy()
-            del popen_kwargs["stdin"]
-            popen_kwargs["universal_newlines"] = not binary
-            if cwd:
-                popen_kwargs["cwd"] = cwd
-            if env:
-                popen_kwargs["env"].update(env)
-            s = subprocess.Popen(self._popen_args, **popen_kwargs)
-        # Otherwise, use pexpect.
-        else:
-            pexpect_kwargs = self._default_pexpect_kwargs.copy()
-            if binary:
-                pexpect_kwargs["encoding"] = None
-            if cwd:
-                pexpect_kwargs["cwd"] = cwd
-            if env:
-                pexpect_kwargs["env"].update(env)
-            # Enable Python subprocesses to work with expect functionality.
-            pexpect_kwargs["env"]["PYTHONUNBUFFERED"] = "1"
-            s = PopenSpawn(self._popen_args, **pexpect_kwargs)
-        self.subprocess = s
-        self.was_run = True
-
-    def expect(self, pattern, timeout=-1):
-        """Waits on the given pattern to appear in std_out"""
-
-        if self.blocking:
-            raise RuntimeError("expect can only be used on non-blocking commands.")
-
-        try:
-            self.subprocess.expect(pattern=pattern, timeout=timeout)
-        except pexpect.EOF:
-            pass
-
-    def send(self, s, end=os.linesep, signal=False):
-        """Sends the given string or signal to std_in."""
-
-        if self.blocking:
-            raise RuntimeError("send can only be used on non-blocking commands.")
-
-        if not signal:
-            if self._uses_subprocess:
-                return self.subprocess.communicate(s + end)
-            else:
-                return self.subprocess.send(s + end)
-        else:
-            self.subprocess.send_signal(s)
-
-    def terminate(self):
-        self.subprocess.terminate()
-
-    def kill(self):
-        if self._uses_pexpect:
-            self.subprocess.kill(signal.SIGINT)
-        else:
-            self.subprocess.send_signal(signal.SIGINT)
-
-    def block(self):
-        """Blocks until process is complete."""
-        if self._uses_subprocess:
-            # consume stdout and stderr
-            if self.blocking:
-                try:
-                    stdout, stderr = self.subprocess.communicate()
-                    self.__out = stdout
-                    self.__err = stderr
-                except ValueError:
-                    pass  # Don't read from finished subprocesses.
-            else:
-                self.subprocess.stdin.close()
-                self.std_out.close()
-                self.std_err.close()
-                self.subprocess.wait()
-        else:
-            self.subprocess.sendeof()
-            try:
-                self.subprocess.wait()
-            finally:
-                if self.subprocess.proc.stdout:
-                    self.subprocess.proc.stdout.close()
-
-    def pipe(self, command, timeout=None, cwd=None):
-        """Runs the current command and passes its output to the next
-        given process.
-        """
-        if not timeout:
-            timeout = self.timeout
-
-        if not self.was_run:
-            self.run(block=False, cwd=cwd)
-
-        data = self.out
-
-        if timeout:
-            c = Command(command, timeout)
-        else:
-            c = Command(command)
-
-        c.run(block=False, cwd=cwd)
-        if data:
-            c.send(data)
-        c.block()
-        return c
-
-
-def _expand_args(command):
-    """Parses command strings and returns a Popen-ready list."""
-
-    # Prepare arguments.
-    if isinstance(command, STR_TYPES):
-        if sys.version_info[0] == 2:
-            splitter = shlex.shlex(command.encode("utf-8"))
-        elif sys.version_info[0] == 3:
-            splitter = shlex.shlex(command)
-        else:
-            splitter = shlex.shlex(command.encode("utf-8"))
-        splitter.whitespace = "|"
-        splitter.whitespace_split = True
-        command = []
-
-        while True:
-            token = splitter.get_token()
-            if token:
-                command.append(token)
-            else:
-                break
-
-        command = list(map(shlex.split, command))
-
-    return command
-
-
-def chain(command, timeout=TIMEOUT, cwd=None, env=None):
-    commands = _expand_args(command)
-    data = None
-
-    for command in commands:
-
-        c = run(command, block=False, timeout=timeout, cwd=cwd, env=env)
-
-        if data:
-            c.send(data)
-            c.subprocess.sendeof()
-
-        data = c.out
-
-    return c
-
-
-def run(command, block=True, binary=False, timeout=TIMEOUT, cwd=None, env=None):
-    c = Command(command, timeout=timeout)
-    c.run(block=block, binary=binary, cwd=cwd, env=env)
-
-    if block:
-        c.block()
-
-    return c

pipenv/vendor/delegator.py.LICENSE

@@ -1,21 +0,0 @@
-The MIT License (MIT)
-
-Copyright 2018 Kenneth Reitz
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

pipenv/vendor/vendor.txt

@@ -9,7 +9,6 @@ click-completion==0.5.2
 click-didyoumean==0.0.3
 click==8.0.1
 colorama==0.4.4
-delegator.py==0.1.1
 distlib==0.3.2
 docopt==0.6.2
 dparse==0.5.1

tests/integration/conftest.py

@@ -2,6 +2,7 @@ import errno
 import json
 import logging
 import os
+from pipenv.utils import subprocess_run
 import shutil
 import sys
 import warnings
@@ -13,7 +14,7 @@ import requests
 
 from pipenv._compat import Path
 from pipenv.exceptions import VirtualenvActivationException
-from pipenv.vendor import delegator, toml, tomlkit
+from pipenv.vendor import toml, tomlkit
 from pipenv.vendor.vistir.compat import (
     FileNotFoundError, PermissionError, ResourceWarning, TemporaryDirectory,
     fs_encode, fs_str
@@ -66,8 +67,8 @@ def check_github_ssh():
         # GitHub does not provide shell access.' if ssh keys are available and
         # registered with GitHub. Otherwise, the command will fail with
         # return_code=255 and say 'Permission denied (publickey).'
-        c = delegator.run('ssh -o StrictHostKeyChecking=no -o CheckHostIP=no -T git@github.com', timeout=30)
-        res = True if c.return_code == 1 else False
+        c = subprocess_run('ssh -o StrictHostKeyChecking=no -o CheckHostIP=no -T git@github.com', timeout=30, shell=True)
+        res = True if c.returncode == 1 else False
     except KeyboardInterrupt:
         warnings.warn(
             "KeyboardInterrupt while checking GitHub ssh access", RuntimeWarning
@@ -87,11 +88,8 @@ def check_github_ssh():
 
 
 def check_for_mercurial():
-    c = delegator.run("hg --help")
-    if c.return_code != 0:
-        return False
-    else:
-        return True
+    c = subprocess_run("hg --help", shell=True)
+    return c.returncode == 0
 
 
 TESTS_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -385,8 +383,8 @@ class _PipenvInstance:
 
         with TemporaryDirectory(prefix='pipenv-', suffix='-cache') as tempdir:
             os.environ['PIPENV_CACHE_DIR'] = fs_str(tempdir.name)
-            c = delegator.run(
-                f'pipenv {cmd}', block=block,
+            c = subprocess_run(
+                f'pipenv {cmd}', block=block, shell=True,
                 cwd=os.path.abspath(self.path), env=os.environ.copy()
             )
             if 'PIPENV_CACHE_DIR' in os.environ:
@@ -398,9 +396,9 @@ class _PipenvInstance:
         # Pretty output for failing tests.
         if block:
             print(f'$ pipenv {cmd}')
-            print(c.out)
-            print(c.err, file=sys.stderr)
-            if c.return_code != 0:
+            print(c.stdout)
+            print(c.stderr, file=sys.stderr)
+            if c.returncode != 0:
                 print("Command failed...")
 
         # Where the action happens.

tests/integration/test_cli.py

@@ -15,18 +15,18 @@ from pipenv.utils import normalize_drive
 def test_pipenv_where(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv("--where")
-        assert c.ok
-        assert normalize_drive(p.path) in c.out
+        assert c.returncode == 0
+        assert normalize_drive(p.path) in c.stdout
 
 
 @pytest.mark.cli
 def test_pipenv_venv(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--python python')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('--venv')
-        assert c.ok
-        venv_path = c.out.strip()
+        assert c.returncode == 0
+        venv_path = c.stdout.strip()
         assert os.path.isdir(venv_path)
 
 
@@ -34,10 +34,10 @@ def test_pipenv_venv(PipenvInstance):
 def test_pipenv_py(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--python python')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('--py')
-        assert c.ok
-        python = c.out.strip()
+        assert c.returncode == 0
+        python = c.stdout.strip()
         assert os.path.basename(python).startswith('python')
 
 
@@ -46,12 +46,12 @@ def test_pipenv_site_packages(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--python python --site-packages')
         assert c.return_code == 0
-        assert 'Making site-packages available' in c.err
+        assert 'Making site-packages available' in c.stderr
 
         # no-global-site-packages.txt under stdlib dir should not exist.
         c = p.pipenv('run python -c "import sysconfig; print(sysconfig.get_path(\'stdlib\'))"')
         assert c.return_code == 0
-        stdlib_path = c.out.strip()
+        stdlib_path = c.stdout.strip()
         assert not os.path.isfile(os.path.join(stdlib_path, 'no-global-site-packages.txt'))
 
 
@@ -59,23 +59,23 @@ def test_pipenv_site_packages(PipenvInstance):
 def test_pipenv_support(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--support')
-        assert c.ok
-        assert c.out
+        assert c.returncode == 0
+        assert c.stdout
 
 
 @pytest.mark.cli
 def test_pipenv_rm(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--python python')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('--venv')
-        assert c.ok
-        venv_path = c.out.strip()
+        assert c.returncode == 0
+        venv_path = c.stdout.strip()
         assert os.path.isdir(venv_path)
 
         c = p.pipenv('--rm')
-        assert c.ok
-        assert c.out
+        assert c.returncode == 0
+        assert c.stdout
         assert not os.path.isdir(venv_path)
 
 
@@ -83,7 +83,7 @@ def test_pipenv_rm(PipenvInstance):
 def test_pipenv_graph(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('install tablib')
-        assert c.ok
+        assert c.returncode == 0
         graph = p.pipenv("graph")
         assert graph.ok
         assert "tablib" in graph.out
@@ -99,14 +99,14 @@ def test_pipenv_graph(PipenvInstance):
 def test_pipenv_graph_reverse(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('install tablib==0.13.0')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('graph --reverse')
-        assert c.ok
-        output = c.out
+        assert c.returncode == 0
+        output = c.stdout
 
         c = p.pipenv('graph --reverse --json')
         assert c.return_code == 1
-        assert 'Warning: Using both --reverse and --json together is not supported.' in c.err
+        assert 'Warning: Using both --reverse and --json together is not supported.' in c.stderr
 
         requests_dependency = [
             ('backports.csv', 'backports.csv'),
@@ -145,14 +145,14 @@ def test_pipenv_check(PipenvInstance):
         p.pipenv('install requests==1.0.0')
         c = p.pipenv('check')
         assert c.return_code != 0
-        assert 'requests' in c.out
+        assert 'requests' in c.stdout
         c = p.pipenv('uninstall requests')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('install six')
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv('check --ignore 35015')
         assert c.return_code == 0
-        assert 'Ignoring' in c.err
+        assert 'Ignoring' in c.stderr
 
 
 @pytest.mark.cli
@@ -166,7 +166,7 @@ def test_pipenv_clean_pip_no_warnings(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv('clean')
         assert c.return_code == 0
-        assert c.out, f"{c.out} -- STDERR: {c.err}"
+        assert c.stdout, f"{c.stdout} -- STDERR: {c.stderr}"
 
 
 @pytest.mark.cli
@@ -180,7 +180,7 @@ def test_pipenv_clean_pip_warnings(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv('clean')
         assert c.return_code == 0
-        assert c.err
+        assert c.stderr
 
 
 @pytest.mark.cli
@@ -205,8 +205,8 @@ pyver = "which python"
             """.strip()
             f.write(contents)
         c = p.pipenv('scripts')
-        assert 'pyver' in c.out
-        assert 'which python' in c.out
+        assert 'pyver' in c.stdout
+        assert 'which python' in c.stdout
 
 
 @pytest.mark.cli
@@ -219,7 +219,7 @@ def test_help(PipenvInstance):
 def test_man(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--man')
-        assert c.return_code == 0 or c.err
+        assert c.return_code == 0, c.stderr
 
 
 @pytest.mark.cli
@@ -259,8 +259,8 @@ import flask
         assert all(pkg in p.pipfile['packages'] for pkg in ['requests', 'click', 'flask']), p.pipfile["packages"]
 
         c = p.pipenv('check --unused .')
-        assert 'click' not in c.out
-        assert 'flask' not in c.out
+        assert 'click' not in c.stdout
+        assert 'flask' not in c.stdout
 
 
 @pytest.mark.cli
@@ -268,7 +268,7 @@ def test_pipenv_clear(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--clear')
         assert c.return_code == 0
-        assert 'Clearing caches' in c.out
+        assert 'Clearing caches' in c.stdout
 
 
 @pytest.mark.cli
@@ -276,7 +276,7 @@ def test_pipenv_three(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv('--three')
         assert c.return_code == 0
-        assert 'Successfully created virtual environment' in c.err
+        assert 'Successfully created virtual environment' in c.stderr
 
 
 @pytest.mark.outdated

tests/integration/test_dot_venv.py

@@ -65,7 +65,7 @@ def test_venv_file(venv_name, PipenvInstance):
 
             c = p.pipenv('--venv')
             assert c.return_code == 0
-            venv_loc = Path(c.out.strip()).absolute()
+            venv_loc = Path(c.stdout.strip()).absolute()
             assert venv_loc.exists()
             assert venv_loc.joinpath('.project').exists()
             venv_path = normalize_drive(venv_loc.as_posix())
@@ -96,7 +96,7 @@ def test_venv_file_with_path(PipenvInstance):
             assert c.return_code == 0
             c = p.pipenv('--venv')
             assert c.return_code == 0
-            venv_loc = Path(c.out.strip())
+            venv_loc = Path(c.stdout.strip())
 
             assert venv_loc.joinpath('.project').exists()
             assert venv_loc == Path(venv_path.name)

tests/integration/test_install_basic.py

@@ -5,8 +5,7 @@ import pytest
 from flaky import flaky
 
 from pipenv._compat import Path, TemporaryDirectory
-from pipenv.utils import temp_environ
-from pipenv.vendor import delegator
+from pipenv.utils import subprocess_run, temp_environ
 
 
 @pytest.mark.setup
@@ -288,9 +287,9 @@ def test_requirements_to_pipfile(PipenvInstance, pypi):
 
         c = p.pipenv("install")
         assert c.return_code == 0
-        print(c.out)
-        print(c.err)
-        print(delegator.run("ls -l").out)
+        print(c.stdout)
+        print(c.stderr)
+        print(subprocess_run(["ls", "-l"]).stdout)
 
         # assert stuff in pipfile
         assert "requests" in p.pipfile["packages"]
@@ -327,7 +326,7 @@ fake_package = "<0.12"
             """.strip()
             f.write(contents)
         c = p.pipenv("install")
-        assert c.ok
+        assert c.returncode == 0
         assert "fake_package" in p.pipfile["packages"]
         assert "fake-package" in p.lockfile["default"]
         assert "six" in p.pipfile["packages"]
@@ -384,7 +383,7 @@ def test_editable_no_args(PipenvInstance):
     with PipenvInstance() as p:
         c = p.pipenv("install -e")
         assert c.return_code != 0
-        assert "Error: Option '-e' requires an argument" in c.err
+        assert "Error: Option '-e' requires an argument" in c.stderr
 
 
 @pytest.mark.basic
@@ -405,7 +404,7 @@ def test_install_venv_project_directory(PipenvInstance):
             assert c.return_code == 0
 
             venv_loc = None
-            for line in c.err.splitlines():
+            for line in c.stderr.splitlines():
                 if line.startswith("Virtualenv location:"):
                     venv_loc = Path(line.split(":", 1)[-1].strip())
             assert venv_loc is not None
@@ -421,8 +420,8 @@ def test_system_and_deploy_work(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv("--rm")
         assert c.return_code == 0
-        c = delegator.run("virtualenv .venv")
-        assert c.return_code == 0
+        c = subprocess_run(["virtualenv", ".venv"])
+        assert c.returncode == 0
         c = p.pipenv("install --system --deploy")
         assert c.return_code == 0
         c = p.pipenv("--rm")
@@ -456,7 +455,7 @@ def test_install_creates_pipfile(PipenvInstance):
 def test_install_non_exist_dep(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv("install dateutil")
-        assert not c.ok
+        assert c.returncode
         assert "dateutil" not in p.pipfile["packages"]
 
 
@@ -465,7 +464,7 @@ def test_install_non_exist_dep(PipenvInstance):
 def test_install_package_with_dots(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv("install backports.html")
-        assert c.ok
+        assert c.returncode == 0
         assert "backports.html" in p.pipfile["packages"]
 
 

tests/integration/test_install_markers.py

@@ -24,7 +24,7 @@ fake_package = {version = "*", markers="os_name=='splashwear'"}
 
         c = p.pipenv('install')
         assert c.return_code == 0
-        assert 'Ignoring' in c.out
+        assert 'Ignoring' in c.stdout
         assert 'markers' in p.lockfile['default']['fake-package'], p.lockfile["default"]
 
         c = p.pipenv('run python -c "import fake_package;"')
@@ -73,7 +73,7 @@ fake-package = {version = "*", os_name = "== 'splashwear'"}
         c = p.pipenv('install')
         assert c.return_code == 0
 
-        assert 'Ignoring' in c.out
+        assert 'Ignoring' in c.stdout
         assert 'markers' in p.lockfile['default']['fake-package']
 
         c = p.pipenv('run python -c "import fake_package;"')

tests/integration/test_install_twists.py

@@ -8,7 +8,6 @@ from flaky import flaky
 
 from pipenv._compat import Path
 from pipenv.utils import mkdir_p, temp_environ
-from pipenv.vendor import delegator
 
 
 @pytest.mark.extras
@@ -369,7 +368,7 @@ def test_multiple_editable_packages_should_not_race(PipenvInstance, testsroot):
         assert c.return_code == 0
 
         c = p.pipenv('run python -c "import requests, flask, six, jinja2"')
-        assert c.return_code == 0, c.err
+        assert c.return_code == 0, c.stderr
 
 
 @pytest.mark.outdated
@@ -380,8 +379,8 @@ def test_outdated_should_compare_postreleases_without_failing(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv("update --outdated")
         assert c.return_code == 0
-        assert "Skipped Update" in c.err
+        assert "Skipped Update" in c.stderr
         p._pipfile.update("ibm-db-sa-py3", "*")
         c = p.pipenv("update --outdated")
         assert c.return_code != 0
-        assert "out-of-date" in c.out
+        assert "out-of-date" in c.stdout

tests/integration/test_install_uri.py

@@ -5,9 +5,8 @@ import pytest
 
 from flaky import flaky
 
-import delegator
-
 from pipenv._compat import Path
+from pipenv.utils import subprocess_run
 
 
 @flaky
@@ -127,10 +126,10 @@ def test_local_vcs_urls_work(PipenvInstance, tmpdir):
     six_dir = tmpdir.join("six")
     six_path = Path(six_dir.strpath)
     with PipenvInstance(chdir=True) as p:
-        c = delegator.run(
-            "git clone https://github.com/benjaminp/six.git {0}".format(six_dir.strpath)
+        c = subprocess_run(
+            ["git", "clone", "https://github.com/benjaminp/six.git", six_dir.strpath]
         )
-        assert c.return_code == 0
+        assert c.returncode == 0
 
         c = p.pipenv("install git+{0}#egg=six".format(six_path.as_uri()))
         assert c.return_code == 0
@@ -216,9 +215,9 @@ def test_install_local_vcs_not_in_lockfile(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         # six_path = os.path.join(p.path, "six")
         six_path = p._pipfile.get_fixture_path("git/six/").as_posix()
-        c = delegator.run("git clone {0} ./six".format(six_path))
-        assert c.return_code == 0
-        c = p.pipenv("install -e ./six".format(six_path))
+        c = subprocess_run(["git", "clone", six_path, "./six"])
+        assert c.returncode == 0
+        c = p.pipenv("install -e ./six")
         assert c.return_code == 0
         six_key = list(p.pipfile["packages"].keys())[0]
         # we don't need the rest of the test anymore, this just works on its own

tests/integration/test_lock.py

@@ -51,7 +51,7 @@ flask = "==0.12.2"
         assert d.return_code == 0
 
         for req in req_list:
-            assert req in c.out
+            assert req in c.stdout
 
         for req in dev_req_list:
             assert req in d.out
@@ -102,8 +102,8 @@ def test_keep_outdated_doesnt_remove_lockfile_entries(PipenvInstance):
         p._pipfile.add("requests", "==2.18.4")
         p._pipfile.add("colorama", {"version": "*", "markers": "os_name=='FakeOS'"})
         c = p.pipenv("install")
-        assert c.ok
-        assert "doesn't match your environment, its dependencies won't be resolved." in c.err
+        assert c.returncode == 0
+        assert "doesn't match your environment, its dependencies won't be resolved." in c.stderr
         p._pipfile.add("six", "*")
         p.pipenv("lock --keep-outdated")
         assert "colorama" in p.lockfile["default"]
@@ -115,11 +115,11 @@ def test_resolve_skip_unmatched_requirements(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         p._pipfile.add("missing-package", {"markers": "os_name=='FakeOS'"})
         c = p.pipenv("lock")
-        assert c.ok
+        assert c.returncode == 0
         assert (
             "Could not find a version of missing-package; "
             "os_name == 'FakeOS' that matches your environment"
-        ) in c.err
+        ) in c.stderr
 
 
 @pytest.mark.lock
@@ -128,10 +128,10 @@ def test_keep_outdated_doesnt_upgrade_pipfile_pins(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         p._pipfile.add("urllib3", "==1.21.1")
         c = p.pipenv("install")
-        assert c.ok
+        assert c.returncode == 0
         p._pipfile.add("requests", "==2.18.4")
         c = p.pipenv("lock --keep-outdated")
-        assert c.ok
+        assert c.returncode == 0
         assert "requests" in p.lockfile["default"]
         assert "urllib3" in p.lockfile["default"]
         assert p.lockfile["default"]["requests"]["version"] == "==2.18.4"
@@ -142,7 +142,7 @@ def test_keep_outdated_doesnt_upgrade_pipfile_pins(PipenvInstance):
 def test_keep_outdated_keeps_markers_not_removed(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv("install six click")
-        assert c.ok
+        assert c.returncode == 0
         lockfile = Path(p.lockfile_path)
         lockfile_content = lockfile.read_text()
         lockfile_json = json.loads(lockfile_content)
@@ -150,7 +150,7 @@ def test_keep_outdated_keeps_markers_not_removed(PipenvInstance):
         lockfile_json["default"]["six"]["markers"] = "python_version >= '2.7'"
         lockfile.write_text(to_text(json.dumps(lockfile_json)))
         c = p.pipenv("lock --keep-outdated")
-        assert c.ok
+        assert c.returncode == 0
         assert p.lockfile["default"]["six"].get("markers", "") == "python_version >= '2.7'"
 
 
@@ -160,17 +160,17 @@ def test_keep_outdated_doesnt_update_satisfied_constraints(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         p._pipfile.add("requests", "==2.18.4")
         c = p.pipenv("install")
-        assert c.ok
+        assert c.returncode == 0
         p._pipfile.add("requests", "*")
         assert p.pipfile["packages"]["requests"] == "*"
         c = p.pipenv("lock --keep-outdated")
-        assert c.ok
+        assert c.returncode == 0
         assert "requests" in p.lockfile["default"]
         assert "urllib3" in p.lockfile["default"]
         # ensure this didn't update requests
         assert p.lockfile["default"]["requests"]["version"] == "==2.18.4"
         c = p.pipenv("lock")
-        assert c.ok
+        assert c.returncode == 0
         assert p.lockfile["default"]["requests"]["version"] != "==2.18.4"
 
 
@@ -270,7 +270,7 @@ requests = {version = "*", extras = ["socks"]}
 
         c = p.pipenv('lock -r')
         assert c.return_code == 0
-        assert "extra == 'socks'" not in c.out.strip()
+        assert "extra == 'socks'" not in c.stdout.strip()
 
 
 @pytest.mark.lock
@@ -354,8 +354,8 @@ requests = "*"
         assert c.return_code == 0
         c = p.pipenv('lock -r')
         assert c.return_code == 0
-        assert '-i https://pypi.org/simple' in c.out.strip()
-        assert '--extra-index-url https://test.pypi.org/simple' in c.out.strip()
+        assert '-i https://pypi.org/simple' in c.stdout.strip()
+        assert '--extra-index-url https://test.pypi.org/simple' in c.stdout.strip()
 
 
 @pytest.mark.lock
@@ -391,9 +391,9 @@ fake-package = "*"
         assert c.return_code == 0
         c = p.pipenv(f'lock -r --pypi-mirror {mirror_url}')
         assert c.return_code == 0
-        assert f'-i {mirror_url}' in c.out.strip()
-        assert '--extra-index-url https://test.pypi.org/simple' in c.out.strip()
-        assert f'--extra-index-url {mirror_url}' not in c.out.strip()
+        assert f'-i {mirror_url}' in c.stdout.strip()
+        assert '--extra-index-url https://test.pypi.org/simple' in c.stdout.strip()
+        assert f'--extra-index-url {mirror_url}' not in c.stdout.strip()
 
 
 @pytest.mark.lock
@@ -418,7 +418,7 @@ def test_outdated_setuptools_with_pep517_legacy_build_meta_is_updated(PipenvInst
         assert c.return_code == 0
         c = p.pipenv("run python -c 'import setuptools; print(setuptools.__version__)'")
         assert c.return_code == 0
-        assert c.out.strip() == "40.2.0"
+        assert c.stdout.strip() == "40.2.0"
         c = p.pipenv("install legacy-backend-package")
         assert c.return_code == 0
         assert "vistir" in p.lockfile["default"]
@@ -441,7 +441,7 @@ def test_outdated_setuptools_with_pep517_cython_import_in_setuppy(PipenvInstance
         assert c.return_code == 0
         c = p.pipenv("run python -c 'import setuptools; print(setuptools.__version__)'")
         assert c.return_code == 0
-        assert c.out.strip() == "40.2.0"
+        assert c.stdout.strip() == "40.2.0"
         c = p.pipenv("install cython-import-package")
         assert c.return_code == 0
         assert "vistir" in p.lockfile["default"]
@@ -594,7 +594,7 @@ django = "*"
         assert c.return_code == 0
         c = p.pipenv('run python --version')
         assert c.return_code == 0
-        py_version = c.err.splitlines()[-1].strip().split()[-1]
+        py_version = c.stderr.splitlines()[-1].strip().split()[-1]
         django_version = '==2.0.6' if py_version.startswith('3') else '==1.11.13'
         assert py_version == '2.7.14'
         assert p.lockfile['default']['django']['version'] == django_version
@@ -608,7 +608,7 @@ def test_lockfile_corrupted(PipenvInstance):
             f.write('{corrupted}')
         c = p.pipenv('install')
         assert c.return_code == 0
-        assert 'Pipfile.lock is corrupted' in c.err
+        assert 'Pipfile.lock is corrupted' in c.stderr
         assert p.lockfile['_meta']
 
 
@@ -620,7 +620,7 @@ def test_lockfile_with_empty_dict(PipenvInstance):
             f.write('{}')
         c = p.pipenv('install')
         assert c.return_code == 0
-        assert 'Pipfile.lock is corrupted' in c.err
+        assert 'Pipfile.lock is corrupted' in c.stderr
         assert p.lockfile['_meta']
 
 
@@ -653,9 +653,9 @@ def test_lock_no_warnings(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv('run python -c "import warnings; warnings.warn(\\"This is a warning\\", DeprecationWarning); print(\\"hello\\")"')
         assert c.return_code == 0
-        assert "Warning" in c.err
-        assert "Warning" not in c.out
-        assert "hello" in c.out
+        assert "Warning" in c.stderr
+        assert "Warning" not in c.stdout
+        assert "hello" in c.stdout
 
 
 @pytest.mark.lock
@@ -673,9 +673,9 @@ def test_lock_missing_cache_entries_gets_all_hashes(PipenvInstance, tmpdir):
             p._pipfile.add("pathlib2", "*")
             assert "pathlib2" in p.pipfile["packages"]
             c = p.pipenv("install")
-            assert c.return_code == 0, (c.err, ("\n".join([f"{k}: {v}\n" for k, v in os.environ.items()])))
+            assert c.return_code == 0, (c.stderr, ("\n".join([f"{k}: {v}\n" for k, v in os.environ.items()])))
             c = p.pipenv("lock --clear")
-            assert c.return_code == 0, c.err
+            assert c.return_code == 0, c.stderr
             assert "pathlib2" in p.lockfile["default"]
             assert "scandir" in p.lockfile["default"]
             assert isinstance(p.lockfile["default"]["scandir"]["hashes"], list)
@@ -765,7 +765,7 @@ def test_lock_nested_vcs_direct_url(PipenvInstance):
 def test_lock_package_with_wildcard_version(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv("install 'six==1.11.*'")
-        assert c.ok
+        assert c.returncode == 0
         assert "six" in p.pipfile["packages"]
         assert p.pipfile["packages"]["six"] == "==1.11.*"
         assert "six" in p.lockfile["default"]
@@ -778,8 +778,8 @@ def test_lock_package_with_wildcard_version(PipenvInstance):
 def test_default_lock_overwrite_dev_lock(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv("install 'click==6.7'")
-        assert c.ok
+        assert c.returncode == 0
         c = p.pipenv("install -d flask")
-        assert c.ok
+        assert c.returncode == 0
         assert p.lockfile["default"]["click"]["version"] == "==6.7"
         assert p.lockfile["develop"]["click"]["version"] == "==6.7"

tests/integration/test_pipenv.py

@@ -8,8 +8,7 @@ import os
 import pytest
 
 from pipenv.project import Project
-from pipenv.utils import temp_environ
-from pipenv.vendor import delegator
+from pipenv.utils import subprocess_run, temp_environ
 
 
 @pytest.mark.code
@@ -40,8 +39,8 @@ pytest = "==4.6.9"
             f.write(contents)
         c = p.pipenv('install --verbose')
         if c.return_code != 0:
-            assert c.err == '' or c.err is None
-            assert c.out == ''
+            assert c.stderr == '' or c.stderr is None
+            assert c.stdout == ''
         assert c.return_code == 0
         c = p.pipenv('lock')
         assert c.return_code == 0
@@ -74,7 +73,7 @@ def test_update_locks(PipenvInstance):
         assert p.lockfile['default']['jdcal']['version'] == '==1.4'
         c = p.pipenv('run pip freeze')
         assert c.return_code == 0
-        lines = c.out.splitlines()
+        lines = c.stdout.splitlines()
         assert 'jdcal==1.4' in [l.strip() for l in lines]
 
 
@@ -82,8 +81,8 @@ def test_update_locks(PipenvInstance):
 @pytest.mark.proper_names
 def test_proper_names_unamanged_virtualenv(PipenvInstance):
     with PipenvInstance(chdir=True):
-        c = delegator.run('python -m virtualenv .venv')
-        assert c.return_code == 0
+        c = subprocess_run(['python', '-m', 'virtualenv', '.venv'])
+        assert c.returncode == 0
         project = Project()
         assert project.proper_names == []
 
@@ -98,7 +97,7 @@ def test_directory_with_leading_dash(raw_venv, PipenvInstance):
             assert c.return_code == 0
             c = p.pipenv('--venv')
             assert c.return_code == 0
-            venv_path = c.out.strip()
+            venv_path = c.stdout.strip()
             assert os.path.isdir(venv_path)
             # Manually clean up environment, since PipenvInstance assumes that
             # the virutalenv is in the project directory.

tests/integration/test_project.py

@@ -1,4 +1,3 @@
-import io
 import os
 import tarfile
 
@@ -6,9 +5,8 @@ import pytest
 
 from pipenv.patched import pipfile
 from pipenv.project import Project
-from pipenv.utils import temp_environ
+from pipenv.utils import subprocess_run, temp_environ
 from pipenv.vendor.vistir.path import is_in_path, normalize_path
-from pipenv.vendor.delegator import run as delegator_run
 
 
 @pytest.mark.project
@@ -172,40 +170,40 @@ def test_include_editable_packages(PipenvInstance, testsroot, pathlib_tmpdir):
 @pytest.mark.virtualenv
 def test_run_in_virtualenv_with_global_context(PipenvInstance, virtualenv):
     with PipenvInstance(chdir=True, venv_root=virtualenv.as_posix(), ignore_virtualenvs=False, venv_in_project=False) as p:
-        c = delegator_run(
-            "pipenv run pip freeze", cwd=os.path.abspath(p.path),
+        c = subprocess_run(
+            ["pipenv", "run", "pip", "freeze"], cwd=os.path.abspath(p.path),
             env=os.environ.copy()
         )
-        assert c.return_code == 0, (c.out, c.err)
-        assert 'Creating a virtualenv' not in c.err, c.err
+        assert c.returncode == 0, (c.stdout, c.stderr)
+        assert 'Creating a virtualenv' not in c.stderr, c.stderr
         project = Project()
         assert project.virtualenv_location == virtualenv.as_posix(), (
             project.virtualenv_location, virtualenv.as_posix()
         )
-        c = delegator_run(
-            f"pipenv run pip install -i {p.index_url} click",
+        c = subprocess_run(
+            ["pipenv", "run", "pip", "install", "-i", p.index_url, "click"],
             cwd=os.path.abspath(p.path),
             env=os.environ.copy()
         )
-        assert c.return_code == 0, (c.out, c.err)
-        assert "Courtesy Notice" in c.err, (c.out, c.err)
-        c = delegator_run(
-            f"pipenv install -i {p.index_url} six",
+        assert c.returncode == 0, (c.stdout, c.stderr)
+        assert "Courtesy Notice" in c.stderr, (c.stdout, c.stderr)
+        c = subprocess_run(
+            ["pipenv", "install", "-i", p.index_url, "six"],
             cwd=os.path.abspath(p.path), env=os.environ.copy()
         )
-        assert c.return_code == 0, (c.out, c.err)
-        c = delegator_run(
-            'pipenv run python -c "import click;print(click.__file__)"',
+        assert c.returncode == 0, (c.stdout, c.stderr)
+        c = subprocess_run(
+            ['pipenv', 'run', 'python', '-c', 'import click;print(click.__file__)'],
             cwd=os.path.abspath(p.path), env=os.environ.copy()
         )
-        assert c.return_code == 0, (c.out, c.err)
-        assert is_in_path(c.out.strip(), str(virtualenv)), (c.out.strip(), str(virtualenv))
-        c = delegator_run(
-            "pipenv clean --dry-run", cwd=os.path.abspath(p.path),
+        assert c.returncode == 0, (c.stdout, c.stderr)
+        assert is_in_path(c.stdout.strip(), str(virtualenv)), (c.stdout.strip(), str(virtualenv))
+        c = subprocess_run(
+            ["pipenv", "clean", "--dry-run"], cwd=os.path.abspath(p.path),
             env=os.environ.copy()
         )
-        assert c.return_code == 0, (c.out, c.err)
-        assert "click" in c.out, c.out
+        assert c.returncode == 0, (c.stdout, c.stderr)
+        assert "click" in c.stdout, c.stdout
 
 
 @pytest.mark.project
@@ -214,7 +212,7 @@ def test_run_in_virtualenv(PipenvInstance):
     with PipenvInstance(chdir=True) as p:
         c = p.pipenv('run pip freeze')
         assert c.return_code == 0
-        assert 'Creating a virtualenv' in c.err
+        assert 'Creating a virtualenv' in c.stderr
         project = Project()
         c = p.pipenv("run pip install click")
         assert c.return_code == 0
@@ -222,12 +220,12 @@ def test_run_in_virtualenv(PipenvInstance):
         assert c.return_code == 0
         c = p.pipenv('run python -c "import click;print(click.__file__)"')
         assert c.return_code == 0
-        assert normalize_path(c.out.strip()).startswith(
+        assert normalize_path(c.stdout.strip()).startswith(
             normalize_path(str(project.virtualenv_location))
         )
         c = p.pipenv("clean --dry-run")
         assert c.return_code == 0
-        assert "click" in c.out
+        assert "click" in c.stdout
 
 @pytest.mark.project
 @pytest.mark.sources

tests/integration/test_run.py

@@ -15,7 +15,7 @@ def test_env(PipenvInstance):
 
         c = p.pipenv('run python -c "import os; print(os.environ[\'HELLO\'])"')
         assert c.return_code == 0
-        assert 'WORLD' in c.out
+        assert 'WORLD' in c.stdout
 
 
 @pytest.mark.run
@@ -38,15 +38,15 @@ multicommand = "bash -c \"cd docs && make html\""
 
         c = p.pipenv('run printfoo')
         assert c.return_code == 0
-        assert c.out == 'foo\n'
-        assert c.err == ''
+        assert c.stdout == 'foo\n'
+        assert c.stderr == ''
 
         c = p.pipenv('run notfoundscript')
         assert c.return_code == 1
-        assert c.out == ''
+        assert c.stdout == ''
         if os.name != 'nt':     # TODO: Implement this message for Windows.
-            assert 'Error' in c.err
-            assert 'randomthingtotally (from notfoundscript)' in c.err
+            assert 'Error' in c.stderr
+            assert 'randomthingtotally (from notfoundscript)' in c.stderr
 
         project = Project()
 
@@ -61,6 +61,6 @@ multicommand = "bash -c \"cd docs && make html\""
         with temp_environ():
             os.environ['HELLO'] = 'WORLD'
             c = p.pipenv("run scriptwithenv")
-            assert c.ok
+            assert c.returncode == 0
             if os.name != "nt":  # This doesn't work on CI windows.
-                assert c.out.strip() == "WORLD"
+                assert c.stdout.strip() == "WORLD"

tests/integration/test_sync.py

@@ -17,7 +17,7 @@ def test_sync_error_without_lockfile(PipenvInstance):
 
         c = p.pipenv('sync')
         assert c.return_code != 0
-        assert 'Pipfile.lock not found!' in c.err
+        assert 'Pipfile.lock not found!' in c.stderr
 
 
 @pytest.mark.sync
@@ -110,4 +110,4 @@ requests = "*"
 
         c = p.pipenv('sync --sequential --verbose')
         for package in p.lockfile['default']:
-            assert f'Successfully installed {package}' in c.out
+            assert f'Successfully installed {package}' in c.stdout

tests/integration/test_uninstall.py

@@ -105,7 +105,7 @@ def test_uninstall_all_local_files(PipenvInstance, testsroot):
         assert c.return_code == 0
         c = p.pipenv("uninstall --all")
         assert c.return_code == 0
-        assert "tablib" in c.out
+        assert "tablib" in c.stdout
         # Uninstall --all is not supposed to remove things from the pipfile
         # Note that it didn't before, but that instead local filenames showed as hashes
         assert "tablib" in p.pipfile["packages"]
@@ -193,4 +193,4 @@ def test_uninstall_missing_parameters(PipenvInstance):
 
         c = p.pipenv("uninstall")
         assert c.return_code != 0
-        assert "No package provided!" in c.err
+        assert "No package provided!" in c.stderr

tests/integration/test_windows.py

@@ -20,7 +20,7 @@ def test_case_changes_windows(PipenvInstance):
         # Canonical venv location.
         c = p.pipenv('--venv')
         assert c.return_code == 0
-        virtualenv_location = c.out.strip()
+        virtualenv_location = c.stdout.strip()
 
         # Dance around to change the casing of the project directory.
         target = p.path.upper()
@@ -33,7 +33,7 @@ def test_case_changes_windows(PipenvInstance):
         # Ensure the incorrectly-cased project can find the correct venv.
         c = p.pipenv('--venv')
         assert c.return_code == 0
-        assert c.out.strip().lower() == virtualenv_location.lower()
+        assert c.stdout.strip().lower() == virtualenv_location.lower()
 
 
 @pytest.mark.files
@@ -78,4 +78,4 @@ def test_pipenv_clean_windows(PipenvInstance):
 
         c = p.pipenv('clean --dry-run')
         assert c.return_code == 0
-        assert 'click' in c.out.strip()
+        assert 'click' in c.stdout.strip()