v20141106

It is necessary only if user want automatic fashion of activation.
If the users of pyenv-virtualenv doesn't need the feature, they can
omit the configuration safely.

.travis.yml

@@ -0,0 +1,6 @@
+install: git clone https://github.com/sstephenson/bats.git
+script: bats/bin/bats --tap test
+language: c
+notifications:
+  email:
+    on_success: never

README.md

@@ -1,4 +1,6 @@
-# pyenv-virtualenv (a.k.a. [python-virtualenv](https://github.com/yyuu/python-virtualenv))
+# pyenv-virtualenv
+
+[![Build Status](https://travis-ci.org/yyuu/pyenv-virtualenv.png)](https://travis-ci.org/yyuu/pyenv-virtualenv)
 
 pyenv-virtualenv is a [pyenv](https://github.com/yyuu/pyenv) plugin
 that provides a `pyenv virtualenv` command to create virtualenv for Python
@@ -12,13 +14,9 @@ to manage your virtualenvs.)
 
 ### Installing as a pyenv plugin
 
-Installing pyenv-virtualenv as a pyenv plugin will give you access to the
-`pyenv virtualenv` command.
-
-    $ git clone git://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv
-
 This will install the latest development version of pyenv-virtualenv into
 the `~/.pyenv/plugins/pyenv-virtualenv` directory. 
+
 **Important note:**  If you installed pyenv into a non-standard directory, make sure that you clone this
 repo into the 'plugins' directory of wherever you installed into.
 
@@ -26,6 +24,21 @@ From inside that directory you can:
  - Check out a specific release tag. 
  - Get the latest development release by running `git pull` to download the latest changes.
 
+1. **Check out pyenv-virtualenv into plugin directory**
+
+        $ git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv
+
+2. **Add `pyenv virtualenv-init` to your shell** to enable activation of virtualenv. This is entirely optional but pretty useful.
+
+        $ echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bash_profile
+
+    **Zsh note**: Modify your `~/.zshenv` file instead of `~/.bash_profile`.
+
+3. **Restart your shell to the enable pyenv-virtualenv**
+
+        $ exec "$SHELL"
+
+
 ### Installing with Homebrew (for OS X users)
 
 Mac OS X users can install pyenv-virtualenv with the
@@ -36,11 +49,18 @@ installed, you will also be able to use the `pyenv virtualenv` command.
 *This is recommended method of installation if you installed pyenv
  with Homebrew.*
 
-    brew install pyenv-virtualenv
+```
+$ brew install pyenv-virtualenv
+```
 
 Or, if you would like to install the latest development release:
 
-    brew install --HEAD pyenv-virtualenv
+```
+$ brew install --HEAD pyenv-virtualenv
+```
+
+After installation, you'll still need to add `eval "$(pyenv virtualenv-init -)"` to your
+profile (as stated in the caveats). You'll only ever have to do this once.
 
 
 ## Usage
@@ -51,10 +71,12 @@ To create a virtualenv for the Python version use with pyenv, run
 `pyenv virtualenv`, specifying the Python version you want and the name
 of the virtualenv directory. For example,
 
-    $ pyenv virtualenv 2.7.6 my-virtual-env-2.7.6
+```
+$ pyenv virtualenv 2.7.7 my-virtual-env-2.7.7
+```
 
-will create a virtualenv based on Python 2.7.6
-under `~/.pyenv/versions` in a folder called `my-virtual-env-2.7.6`. 
+will create a virtualenv based on Python 2.7.7
+under `~/.pyenv/versions` in a folder called `my-virtual-env-2.7.7`. 
 
 
 ### Create virtualenv from current version
@@ -63,19 +85,49 @@ If there is only one argument is given to `pyenv virtualenv`,
 virtualenv will be created with given name based on current
 version.
 
-    $ pyenv version
-    3.3.3 (set by /home/yyuu/.pyenv/version)
-    $ pyenv virtualenv venv33
+```
+$ pyenv version
+3.4.1 (set by /home/yyuu/.pyenv/version)
+$ pyenv virtualenv venv34
+```
 
 
 ### List existing virtualenvs
 
 `pyenv virtualenvs` shows you the list of existing virtualenvs.
 
-    $ pyenv shell venv27
-    $ pyenv virtualenvs
-    * venv27 (created from /home/yyuu/.pyenv/versions/2.7.6)
-      venv33 (created from /home/yyuu/.pyenv/versions/3.3.3)
+```
+$ pyenv shell venv27
+$ pyenv virtualenvs
+* venv27 (created from /home/yyuu/.pyenv/versions/2.7.7)
+  venv34 (created from /home/yyuu/.pyenv/versions/3.4.1)
+```
+
+
+### Activate virtualenv
+
+Some external tools (e.g. [jedi](https://github.com/davidhalter/jedi)) might require you to `activate` the virtualenv.
+The `pyenv-virtualenv` will automatically activate/deactivate the virtualenv if the `eval "$(pyenv virtualenv-init -)"` is properly configured in your shell.
+
+You can also activate and deactivate a pyenv virtualenv this way:
+
+    pyenv activate <name>
+    pyenv deactivate
+
+
+### Delete existing virtualenv
+
+Removing the directory in `~/.pyenv/versions` will delete the virtualenv, or you can run:
+
+    pyenv uninstall my-virtual-env
+    
+
+### virtualenv and pyvenv
+
+There is [venv](http://docs.python.jp/3/library/venv.html) module available for CPython 3.3 and newer.
+It provides a command-line tool `pyvenv` which is the successor of `virtualenv` and distributed by default.
+
+The `pyenv-virtualenv` uses `pyvenv` if it is available and the `virtualenv` is not available.
 
 
 ### Special environment variables
@@ -97,6 +149,53 @@ You can set certain environment variables to control the pyenv-virtualenv.
 
 ## Version History
 
+#### 20141106
+
+ * Stop creating after `ensurepip` since it has done by `ensurepip` itself
+ * Suppress some useless warnings from `pyenv virtualenv-init`
+
+#### 20141012
+
+ * Fix warnings from `shellcheck` to improve support for POSIX sh (#40)
+ * Do not allow whitespace in `VIRTUALENV_NAME` (#44)
+ * Should not persist `PYENV_DEACTIVATE` after automatic deactivation (#47, #48)
+
+#### 20140705
+
+ * Display information on auto-(de)?activation
+ * Support manual (de)?activation with auto-activation enabled (#32, #34)
+ * Exit as error when (de)?activation failed
+ * Use https://bootstrap.pypa.io/ to install setuptools and pip
+ * Create backup of original virtualenv within `$(pyenv root)/versions` when `--upgrade`
+
+#### 20140615
+
+ * Fix incompatibility issue of `pyenv activate` and `pyenv deactivate` (#26)
+ * Workaround for the issue with pyenv-which-ext (#26)
+
+#### 20140614
+
+ * Add `pyenv virtualenv-init` to enable auto-activation feature (#24)
+ * Create symlinks for executables with version suffix (yyuu/pyenv#182)
+
+#### 20140602
+
+ * Use new style GH raw url to avoid redirects (raw.github.com -> raw.githubusercontent.com)
+ * Repaired virtualenv activation and deactivation for the fish shell (#23)
+
+#### 20140421
+
+ * Display error if `pyenv activate` was invoked as a command
+ * Fix completion of `pyenv activate` (#15)
+ * Use `virtualenv` instead of `pyvenv` if `-p` has given (yyuu/pyenv#158)
+
+#### 20140123
+
+ * Add `activate` and `deactivate` to make `pyenv-virtualenv` work with [jedi](https://github.com/davidhalter/jedi) (#9)
+ * Use `ensurepip` to install `pip` if it is available
+ * Unset `PIP_REQUIRE_VENV` to avoid problem on the installation of `virtualenv` (#10)
+ * Add tests
+
 #### 20140110.1
 
  * Fix install script

bin/pyenv-activate

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+#
+# Summary: Activate virtual environment
+#
+# Usage: pyenv activate <virtualenv>
+#        pyenv activate --unset
+#
+# Activate a Python virtualenv environment in current shell.
+# This acts almost as same as `pyenv shell`, but this invokes the `activate`
+# script in your shell.
+#
+# <virtualenv> should be a string matching a Python version known to pyenv.
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+# Provide pyenv completions
+if [ "$1" = "--complete" ]; then
+  echo --unset
+  exec pyenv-virtualenvs --bare
+fi
+
+{ printf "\x1B[31;1m"
+  echo
+  echo "Failed to activate virtualenv."
+  echo
+  echo "Perhaps pyenv-virtualenv has not been loaded into your shell properly."
+  echo "Please restart current shell and try again."
+  echo
+  printf "\x1B[0m"
+} 1>&2
+exit 1

bin/pyenv-deactivate

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# Summary: Deactivate virtual environment
+#
+# Usage: pyenv deactivate
+#
+# Deactivate a Python virtual environment.
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+{ printf "\x1B[31;1m"
+  echo
+  echo "Failed to deactivate virtualenv."
+  echo
+  echo "Perhaps pyenv-virtualenv has not been loaded into your shell properly."
+  echo "Please restart current shell and try again."
+  echo
+  printf "\x1B[0m"
+} 1>&2
+exit 1

bin/pyenv-sh-activate

@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+#
+# Summary: Activate virtual environment
+#
+# Usage: pyenv activate <virtualenv>
+#        pyenv activate --unset
+#
+# Activate a Python virtualenv environment in current shell.
+# This acts almost as same as `pyenv shell`, but this invokes the `activate`
+# script in your shell.
+#
+# <virtualenv> should be a string matching a Python version known to pyenv.
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+unset NOERROR
+unset VERBOSE
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+  "--complete" )
+    # Provide pyenv completions
+    echo --unset
+    exec pyenv-virtualenvs --bare
+    ;;
+  "--no-error" )
+    NOERROR=1
+    ;;
+  "--unset" )
+    echo "pyenv deactivate"
+    exit
+    ;;
+  "--verbose" )
+    VERBOSE=1
+    ;;
+  * )
+    break
+    ;;
+  esac
+  shift 1
+done
+
+versions=("$@")
+if [ -z "$versions" ]; then
+  no_shell=1
+  OLDIFS="$IFS"
+  IFS=: versions=($(pyenv-version-name))
+  IFS="$OLDIFS"
+fi
+
+if [ -z "${PYENV_VIRTUALENV_INIT}" ]; then
+  # Backward compatibility issue
+  # https://github.com/yyuu/pyenv-virtualenv/issues/26
+  no_shell=
+fi
+
+if [ "${#versions[@]}" -gt 1 ]; then
+  [ -n "$NOERROR" ] || echo "pyenv-virtualenv: cannot activate multiple versions at once: ${versions[@]}" 1>&2
+  echo "false"
+  exit 1
+fi
+
+if ! pyenv-virtualenv-prefix "${versions}" 1>/dev/null 2>&1; then
+  [ -n "$NOERROR" ] || echo "pyenv-virtualenv: version \`${versions}' is not a virtualenv" 1>&2
+  echo "false"
+  exit 1
+fi
+
+shell="$(basename "${PYENV_SHELL:-$SHELL}")"
+case "$shell" in
+bash )
+  profile="$HOME/.bash_profile"
+  ;;
+zsh )
+  profile="$HOME/.zshrc"
+  ;;
+ksh )
+  profile="$HOME/.profile"
+  ;;
+fish )
+  profile="$HOME/.config/fish/config.fish"
+  ;;
+* )
+  profile="$HOME/.profile"
+  ;;
+esac
+
+# Display setup instruction if 'pyenv virtualenv-init -' is not found in "$profile"
+if [ -f "$profile" ] && grep -q 'pyenv init -' "$profile" && ! grep -q 'pyenv virtualenv-init -' "$profile"; then
+  pyenv-virtualenv-init >&2 || true
+fi
+
+if [ -n "$VERBOSE" ]; then
+  echo "pyenv-virtualenv: activate ${versions}" 1>&2
+fi
+
+if [ -z "$no_shell" ]; then
+  echo "pyenv shell \"${versions}\";"
+fi
+
+prefix="$(pyenv-prefix "${versions}")"
+case "$shell" in
+fish )
+  cat <<EOS
+set -e PYENV_DEACTIVATE;
+setenv PYENV_ACTIVATE "${prefix}";
+. "${prefix}/bin/activate.fish";
+EOS
+ ;;
+*    )
+  cat <<EOS
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${prefix}";
+. "${prefix}/bin/activate";
+EOS
+  ;;
+esac

bin/pyenv-sh-deactivate

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+#
+# Summary: Deactivate virtual environment
+#
+# Usage: pyenv deactivate
+#
+# Deactivate a Python virtual environment.
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+unset NOERROR
+unset VERBOSE
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+  "--no-error" )
+    NOERROR=1
+    ;;
+  "--verbose" )
+    VERBOSE=1
+    ;;
+  * )
+    break
+    ;;
+  esac
+  shift 1
+done
+
+shell="$(basename "${PYENV_SHELL:-$SHELL}")"
+case "$shell" in
+fish )
+  echo "if functions -q deactivate;"
+  ;;
+*    )
+  echo "if declare -f deactivate 1>/dev/null 2>&1; then"
+  ;;
+esac
+
+prefix="${PYENV_ACTIVATE:-${VIRTUAL_ENV}}"
+
+if [ -n "$VERBOSE" ]; then
+  echo "  echo \"pyenv-virtualenv: deactivate ${prefix##*/}\" 1>&2;"
+fi
+
+if [ -z "${PYENV_VIRTUALENV_INIT}" ]; then
+  # Backward compatibility issue
+  # https://github.com/yyuu/pyenv-virtualenv/issues/26
+  echo "  pyenv shell --unset;"
+fi
+
+case "$shell" in
+fish )
+  cat <<EOS
+  setenv PYENV_DEACTIVATE "$prefix";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+EOS
+  ;;
+*    )
+  cat <<EOS
+  export PYENV_DEACTIVATE="$prefix";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+EOS
+  ;;
+esac
+
+if [ -z "$NOERROR" ]; then
+  echo "  echo \"pyenv-virtualenv: no virtualenv has been activated.\" 1>&2;"
+fi
+
+echo "  false;"
+
+case "$shell" in
+fish )
+  echo "end;"
+  ;;
+*    )
+  echo "fi;"
+  ;;
+esac

bin/pyenv-virtualenv

@@ -2,16 +2,14 @@
 #
 # Summary: Create a Python virtualenv using the pyenv-virtualenv plugin
 #
-# Usage: pyenv virtualenv [-f|--force] [-u|--upgrade] [VIRTUALENV_OPTIONS] <version> <virtualenv-name>
+# Usage: pyenv virtualenv [-f|--force] [VIRTUALENV_OPTIONS] <version> <virtualenv-name>
 #        pyenv virtualenv --version
 #        pyenv virtualenv --help
 #
-#   -u/--upgrade     Upgrade existing virtualenv to use new version of Python,
-#                    assuming Python has been upgraded in-place.
 #   -f/--force       Install even if the version appears to be installed already
 #
 
-PYENV_VIRTUALENV_VERSION="20140110.1"
+PYENV_VIRTUALENV_VERSION="20141106"
 
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
@@ -25,6 +23,9 @@ if [ -z "$PYENV_ROOT" ]; then
   PYENV_ROOT="${HOME}/.pyenv"
 fi
 
+unset PIP_REQUIRE_VENV
+unset PIP_REQUIRE_VIRTUALENV
+
 # Define library functions
 parse_options() {
   OPTIONS=()
@@ -100,8 +101,17 @@ http_get_wget() {
 }
 
 version() {
-  local version="$(venv --version 2>/dev/null || true)"
-  echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (virtualenv ${version:-unknown})"
+  detect_venv
+  local version
+  if [ -n "$USE_PYVENV" ]; then
+    version="$(pyenv-which pyvenv 2>/dev/null || true)"
+    version="${version#$(pyenv-root)/versions/}"
+    version="${version%/bin/pyvenv}"
+    echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (pyvenv ${version:-unknown})"
+  else
+    version="$(venv --version 2>/dev/null || true)"
+    echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (virtualenv ${version:-unknown})"
+  fi
 }
 
 usage() {
@@ -111,59 +121,93 @@ usage() {
   [ -z "$1" ] || exit "$1"
 }
 
-virtualenv_is_pyvenv() {
-  # Use pyvenv only if virtualenv is not installed and there is pyvenv
-  if pyenv-which "virtualenv" 1>/dev/null 2>&1; then
-    return 1
-  else
-    pyenv-which "pyvenv" 1>/dev/null 2>&1
+detect_venv() {
+  # Check the existence of executables as a workaround for the issue with pyenv-which-ext
+  # https://github.com/yyuu/pyenv-virtualenv/issues/26
+  if [ -x "$(pyenv-prefix)/bin/virtualenv" ]; then
+    HAS_VIRTUALENV=1
+  fi
+  if [ -x "$(pyenv-prefix)/bin/pyvenv" ]; then
+    HAS_PYVENV=1
+  fi
+  # Use pyvenv only if there is pyvenv, virtualenv is not installed, and `-p` not given
+  if [ -n "${HAS_PYVENV}" ] && [ -z "${HAS_VIRTUALENV}" ] && [ -z "${VIRTUALENV_PYTHON}" ]; then
+    USE_PYVENV=1
   fi
 }
 
 venv() {
-  if virtualenv_is_pyvenv; then
-    pyenv-exec pyvenv "$@"
+  local args=("$@")
+  if [ -n "${USE_PYVENV}" ]; then
+    pyenv-exec pyvenv "${args[@]}"
   else
-    pyenv-exec virtualenv "$@"
+    pyenv-exec virtualenv "${args[@]}"
   fi
 }
 
-install_setuptools() {
-  local version="$1"
+build_package_ez_setup() {
+  local ez_setup="${PYENV_VIRTUALENV_CACHE_PATH}/ez_setup.py"
+  rm -f "${ez_setup}"
   { if [ "${EZ_SETUP+defined}" ] && [ -f "${EZ_SETUP}" ]; then
       echo "Installing setuptools from ${EZ_SETUP}..." 1>&2
       cat "${EZ_SETUP}"
     else
-      [ -n "${EZ_SETUP_URL}" ] || {
-        if [ -n "${SETUPTOOLS_VERSION}" ]; then
-          EZ_SETUP_URL="https://bitbucket.org/pypa/setuptools/raw/${SETUPTOOLS_VERSION}/ez_setup.py"
-        else
-          EZ_SETUP_URL="https://bitbucket.org/pypa/setuptools/downloads/ez_setup.py"
-        fi
-      }
+      [ -n "${EZ_SETUP_URL}" ] || EZ_SETUP_URL="https://bootstrap.pypa.io/ez_setup.py"
       echo "Installing setuptools from ${EZ_SETUP_URL}..." 1>&2
       http get "${EZ_SETUP_URL}"
     fi
-  } | PYENV_VERSION="${version}" pyenv-exec python
+  } 1> "${ez_setup}"
+  pyenv-exec python "${ez_setup}" ${EZ_SETUP_OPTS} 1>&2 || {
+    echo "error: failed to install setuptools via ez_setup.py" >&2
+    return 1
+  }
 }
 
-install_pip() {
-  local version="$1"
+build_package_get_pip() {
+  local get_pip="${PYENV_VIRTUALENV_CACHE_PATH}/get-pip.py"
+  rm -f "${get_pip}"
   { if [ "${GET_PIP+defined}" ] && [ -f "${GET_PIP}" ]; then
       echo "Installing pip from ${GET_PIP}..." 1>&2
       cat "${GET_PIP}"
     else
-      [ -n "${GET_PIP_URL}" ] || {
-        if [ -n "${PIP_VERSION}" ]; then
-          GET_PIP_URL="https://raw.github.com/pypa/pip/${PIP_VERSION}/contrib/get-pip.py"
-        else
-          GET_PIP_URL="https://raw.github.com/pypa/pip/master/contrib/get-pip.py"
-        fi
-      }
+      [ -n "${GET_PIP_URL}" ] || GET_PIP_URL="https://bootstrap.pypa.io/get-pip.py"
       echo "Installing pip from ${GET_PIP_URL}..." 1>&2
       http get "${GET_PIP_URL}"
     fi
-  } | PYENV_VERSION="${version}" pyenv-exec python
+  } 1> "${get_pip}"
+  pyenv-exec python "${get_pip}" ${GET_PIP_OPTS} 1>&2 || {
+    echo "error: failed to install pip via get-pip.py" >&2
+    return 1
+  }
+}
+
+build_package_ensurepip() {
+  pyenv-exec python -m ensurepip 2>/dev/null|| {
+    build_package_ez_setup "$@" && build_package_get_pip "$@"
+  } || return 1
+}
+
+prepare_requirements() {
+  pyenv-exec pip freeze > "${REQUIREMENTS}"
+  mv -f "${VIRTUALENV_PATH}" "${VIRTUALENV_ORIG}"
+}
+
+install_requirements() {
+  if [ -f "${REQUIREMENTS}" ]; then
+    ## Migrate previously installed packages from requirements.txt
+    pyenv-exec pip install $QUIET $VERBOSE --requirement "${REQUIREMENTS}" || {
+      echo
+      echo "PIP INSTALL FAILED"
+      echo
+      echo "Inspect or clean up the original tree at ${VIRTUALENV_ORIG}"
+      echo
+      echo "Package list:"
+      cat "${REQUIREMENTS}" | sed 's/^/ * /'
+      return 1
+    } 1>&2
+    rm -f "${REQUIREMENTS}"
+    rm -fr "${VIRTUALENV_ORIG}"
+  fi
 }
 
 PYENV_VIRTUALENV_ROOT="$(abs_dirname "$0")/.."
@@ -173,6 +217,7 @@ fi
 VIRTUALENV_OPTIONS=()
 
 unset FORCE
+unset VIRTUALENV_PYTHON
 unset QUIET
 unset UPGRADE
 unset VERBOSE
@@ -186,8 +231,8 @@ for option in "${OPTIONS[@]}"; do
   "h" | "help" )
     usage 0
     ;;
-  "p" )
-    VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--python=${ARGUMENTS[0]}"
+  "p" | "python" )
+    VIRTUALENV_PYTHON="${ARGUMENTS[0]}"
     ARGUMENTS=("${ARGUMENTS[@]:1}") # shift 1
     ;;
   "q" | "quiet" )
@@ -204,13 +249,17 @@ for option in "${OPTIONS[@]}"; do
     exit 0
     ;;
   * ) # virtualenv long options
-    VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--$option"
+    if [[ "$option" == "python="* ]]; then
+      VIRTUALENV_PYTHON="${option#python=}"
+    else
+      VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--$option"
+    fi
     ;;
   esac
 done
 
 if [[ "${#ARGUMENTS[@]}" == 0 ]]; then
-  echo "pyenv: no virtualenv name given." 1>&2
+  echo "pyenv-virtualenv: no virtualenv name given." 1>&2
   exit 1
 elif [[ "${#ARGUMENTS[@]}" == 1 ]]; then
   # If only one argument given, use current version as source version
@@ -226,6 +275,11 @@ if [ -z "${VERSION_NAME}" ] || [ -z "${VIRTUALENV_NAME}" ]; then
   usage 1
 fi
 
+if [ "$VIRTUALENV_NAME" != "${VIRTUALENV_NAME%[[:space:]]*}" ]; then
+  echo "pyenv-virtualenv: no whitespace allowed in virtualenv name." 1>&2
+  exit 1
+fi
+
 # Set VERSION_NAME as default version in this script
 export PYENV_VERSION="${VERSION_NAME}"
 
@@ -238,26 +292,40 @@ else
   TMP="${TMPDIR%/}"
 fi
 
-SEED="$(date "+%Y%m%d%H%M%S").$$"
-UPGRADE_PATH="${TMP}/pyenv-virtualenv.${SEED}"
-UPGRADE_LIST="${TMP}/pyenv-virtualenv.${SEED}.txt"
-
 VIRTUALENV_PATH="${PYENV_ROOT}/versions/${VIRTUALENV_NAME}"
 
-if virtualenv_is_pyvenv; then
-  # Unset some arguments not supported by pyvenv
-  unset QUIET
-  unset VERBOSE
-  if [ -n "$UPGRADE" ]; then
+unset HAS_VIRTUALENV
+unset HAS_PYVENV
+unset USE_PYVENV
+detect_venv
+
+SEED="$(date "+%Y%m%d%H%M%S").$$"
+VIRTUALENV_ORIG="${VIRTUALENV_PATH}.${SEED}"
+REQUIREMENTS="${TMP}/requirements.${SEED}.txt"
+
+# Upgrade existing virtualenv
+if [ -n "$UPGRADE" ]; then
+  FORCE=1
+  # pyvenv has `--upgrade` by default
+  if [ -n "${USE_PYVENV}" ]; then
     unset UPGRADE
     VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--upgrade"
   fi
+fi
+
+if [ -n "${USE_PYVENV}" ]; then
+  # Unset some arguments not supported by pyvenv
+  unset QUIET
+  unset VERBOSE
 else
-  pyenv-which "virtualenv" 1>/dev/null 2>&1 || {
+  if [ -n "${VIRTUALENV_PYTHON}" ]; then
+    VIRTUALENV_OPTIONS[${#VIRTUALENV_OPTIONS[*]}]="--python=${VIRTUALENV_PYTHON}"
+  fi
+  if [ -z "${HAS_VIRTUALENV}" ]; then
     VIRTUALENV_VERSION="==${VIRTUALENV_VERSION}"
     pyenv-exec pip install $QUIET $VERBOSE "virtualenv${VIRTUALENV_VERSION%==}"
-    pyenv-rehash
-  }
+    HAS_VIRTUALENV=1
+  fi
 fi
 
 # Unset environment variables which starts with `VIRTUALENV_`.
@@ -265,6 +333,15 @@ fi
 unset VIRTUALENV_VERSION
 
 
+# Download specified version of ez_setup.py/get-pip.py
+if [ -n "${SETUPTOOLS_VERSION}" ]; then
+  EZ_SETUP_URL="https://bitbucket.org/pypa/setuptools/raw/${SETUPTOOLS_VERSION}/ez_setup.py"
+fi
+if [ -n "${PIP_VERSION}" ]; then
+  GET_PIP_URL="https://raw.githubusercontent.com/pypa/pip/${PIP_VERSION}/contrib/get-pip.py"
+fi
+
+
 # Define `before_virtualenv` and `after_virtualenv` functions that allow
 # plugin hooks to register a string of code for execution before or
 # after the installation process.
@@ -281,9 +358,10 @@ after_virtualenv() {
 }
 
 # Load plugin hooks.
-for script in $(pyenv-hooks virtualenv); do
-  source "$script"
-done
+OLDIFS="$IFS"
+IFS=$'\n' scripts=(`pyenv-hooks virtualenv`)
+IFS="$OLDIFS"
+for script in "${scripts[@]}"; do source "$script"; done
 
 
 [ -d "${VIRTUALENV_PATH}" ] && PREFIX_EXISTS=1
@@ -292,7 +370,7 @@ done
 # the --force option was specified.
 if [ -d "${VIRTUALENV_PATH}/bin" ]; then
   if [ -z "$FORCE" ]; then
-    echo "pyenv: ${VIRTUALENV_PATH} already exists" 1>&2
+    echo "pyenv-virtualenv: ${VIRTUALENV_PATH} already exists" 1>&2
     read -p "continue with installation? (y/N) "
 
     case "$REPLY" in
@@ -302,8 +380,7 @@ if [ -d "${VIRTUALENV_PATH}/bin" ]; then
   fi
 
   if [ -n "$UPGRADE" ]; then
-    PYENV_VERSION="${VIRTUALENV_NAME}" pyenv-exec pip freeze >"${UPGRADE_LIST}"
-    mv -f "${VIRTUALENV_PATH}" "${UPGRADE_PATH}"
+    PYENV_VERSION="${VIRTUALENV_NAME}" prepare_requirements
   fi
 fi
 
@@ -323,37 +400,13 @@ STATUS=0
 # change to cache directory to reuse them between invocation.
 mkdir -p "${PYENV_VIRTUALENV_CACHE_PATH}"
 cd "${PYENV_VIRTUALENV_CACHE_PATH}"
-venv $QUIET $VERBOSE "${VIRTUALENV_OPTIONS[@]}" "${VIRTUALENV_PATH}" && {
-  if virtualenv_is_pyvenv; then
-    PYENV_VERSION="${VIRTUALENV_NAME}" pyenv-exec python -c 'import setuptools' 1>/dev/null 2>&1 || {
-      install_setuptools "${VIRTUALENV_NAME}" 1>&2
-    }
+venv $QUIET $VERBOSE "${VIRTUALENV_OPTIONS[@]}" "${VIRTUALENV_PATH}" || STATUS="$?"
 
-    PYENV_VERSION="${VIRTUALENV_NAME}" pyenv-which pip 1>/dev/null 2>&1 || {
-      install_pip "${VIRTUALENV_NAME}" 1>&2
-    }
-  fi
-} || STATUS="$?"
+## Install setuptools and pip
+PYENV_VERSION="${VIRTUALENV_NAME}" build_package_ensurepip
 
 ## Migrate previously installed packages from requirements.txt
-if [ -n "$UPGRADE" ]; then
-  UPGRADE_STATUS=0
-  PYENV_VERSION="${VIRTUALENV_NAME}" pyenv-exec pip install $QUIET $VERBOSE --requirement "${UPGRADE_LIST}" || UPGRADE_STATUS=$?
-  if [ "$UPGRADE_STATUS" == "0" ]; then
-    rm -f "${UPGRADE_LIST}"
-    rm -fr "${UPGRADE_PATH}"
-  else
-    { echo
-      echo "UPGRADE FAILED"
-      echo
-      echo "Inspect or clean up the original tree at ${UPGRADE_PATH}"
-      echo
-      echo "Package list:"
-      cat "${UPGRADE_LIST}"
-    } 1>&2
-    STATUS="$UPGRADE_STATUS"
-  fi
-fi
+PYENV_VERSION="${VIRTUALENV_NAME}" install_requirements || true
 
 # Execute `after_virtualenv` hooks
 for hook in "${after_hooks[@]}"; do eval "$hook"; done

bin/pyenv-virtualenv-init

@@ -0,0 +1,156 @@
+#!/usr/bin/env bash
+# Summary: Configure the shell environment for pyenv-virtualenv
+# Usage: eval "$(pyenv virtualenv-init - [<shell>])"
+#
+# Automatically activates a Python virtualenv environment based on current
+# pyenv version.
+#
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+print=""
+for args in "$@"
+do
+  if [ "$args" = "-" ]; then
+    print=1
+    shift
+  fi
+done
+
+shell="$1"
+if [ -z "$shell" ]; then
+  shell="$(ps c -p "$PPID" -o 'ucomm=' 2>/dev/null || true)"
+  shell="${shell##-}"
+  shell="${shell%% *}"
+  shell="$(basename "${shell:-$SHELL}")"
+fi
+
+if [ -z "$print" ]; then
+  case "$shell" in
+  bash )
+    profile='~/.bash_profile'
+    ;;
+  zsh )
+    profile='~/.zshrc'
+    ;;
+  ksh )
+    profile='~/.profile'
+    ;;
+  fish )
+    profile='~/.config/fish/config.fish'
+    ;;
+  * )
+    profile='your profile'
+    ;;
+  esac
+
+  { echo "# Load pyenv-virtualenv automatically by adding"
+    echo "# the following to ${profile}:"
+    echo
+    case "$shell" in
+    fish )
+      echo 'status --is-interactive; and . (pyenv virtualenv-init -|psub)'
+      ;;
+    * )
+      echo 'eval "$(pyenv virtualenv-init -)"'
+      ;;
+    esac
+    echo
+  } >&2
+
+  exit 1
+fi
+
+case "$shell" in
+fish )
+  echo "setenv PYENV_VIRTUALENV_INIT 1;"
+  ;;
+* )
+  echo "export PYENV_VIRTUALENV_INIT=1;"
+  ;;
+esac
+
+case "$shell" in
+fish )
+  cat <<EOS
+function _pyenv_virtualenv_hook --on-event fish_prompt;
+  if [ -n "\$PYENV_ACTIVATE" ]
+    if [ (pyenv version-name) = "system" ]
+      pyenv deactivate --no-error --verbose
+      set -e PYENV_DEACTIVATE
+      return 0
+    end
+    if [ "\$PYENV_ACTIVATE" != (pyenv prefix 2>/dev/null) ]
+      if pyenv deactivate --no-error --verbose
+        set -e PYENV_DEACTIVATE
+        pyenv activate --no-error --verbose; or set -e PYENV_DEACTIVATE
+      else
+        pyenv activate --no-error --verbose
+      end
+    end
+  else
+    if [ -z "\$VIRTUAL_ENV" ]; and [ "\$PYENV_DEACTIVATE" != (pyenv prefix 2>/dev/null) ]
+      pyenv activate --no-error --verbose
+    end
+  end
+end
+EOS
+ ;;
+ksh )
+  cat <<EOS
+function _pyenv_virtualenv_hook() {
+EOS
+  ;;
+* )
+  cat <<EOS
+_pyenv_virtualenv_hook() {
+EOS
+  ;;
+esac
+
+if [[ "$shell" != "fish" ]]; then
+  cat <<EOS
+  if [ -n "\$PYENV_ACTIVATE" ]; then
+    if [ "\$(pyenv version-name)" = "system" ]; then
+      pyenv deactivate --no-error --verbose
+      unset PYENV_DEACTIVATE
+      return 0
+    fi
+    if [ "\$PYENV_ACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      if pyenv deactivate --no-error --verbose; then
+        unset PYENV_DEACTIVATE
+        pyenv activate --no-error --verbose || unset PYENV_DEACTIVATE
+      else
+        pyenv activate --no-error --verbose
+      fi
+    fi
+  else
+    if [ -z "\$VIRTUAL_ENV" ] && [ "\$PYENV_DEACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      pyenv activate --no-error --verbose
+    fi
+  fi
+};
+EOS
+
+  case "$shell" in
+  bash )
+    cat <<EOS
+if ! [[ "\$PROMPT_COMMAND" =~ _pyenv_virtualenv_hook ]]; then
+  PROMPT_COMMAND="_pyenv_virtualenv_hook;\$PROMPT_COMMAND";
+fi
+EOS
+    ;;
+  zsh )
+    cat <<EOS
+typeset -a precmd_functions
+if [[ -z \$precmd_functions[(r)_pyenv_virtualenv_hook] ]]; then
+  precmd_functions+=_pyenv_virtualenv_hook;
+fi
+EOS
+    ;;
+  * )
+    # FIXME: what should i do here??
+    ;;
+  esac
+fi

bin/pyenv-virtualenv-prefix

@@ -32,14 +32,16 @@ base_prefix() { # pyvenv
 
 VIRTUALENV_PREFIX_PATHS=()
 for version in "${versions[@]}"; do
+  if [ "$version" = "system" ]; then
+    echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
+    exit 1
+  fi
   PREFIX="$(pyenv-prefix "${version}")"
   if [ -f "${PREFIX}/bin/activate" ]; then
     VIRTUALENV_PREFIX_PATH="$(real_prefix "${version}" || base_prefix "${version}" || true)"
-    if [ -d "${VIRTUALENV_PREFIX_PATH}" ]; then
-      VIRTUALENV_PREFIX_PATHS=("${VIRTUALENV_PREFIX_PATHS[@]}" "$VIRTUALENV_PREFIX_PATH")
-    fi
+    VIRTUALENV_PREFIX_PATHS=("${VIRTUALENV_PREFIX_PATHS[@]}" "$VIRTUALENV_PREFIX_PATH")
   else
-    echo "pyenv: version \`${version}' is not a virtualenv" 1>&2
+    echo "pyenv-virtualenv: version \`${version}' is not a virtualenv" 1>&2
     exit 1
   fi
 done

test/activate.bats

@@ -0,0 +1,217 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export HOME="${TMP}"
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+@test "activate virtualenv from current version" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv";
+. "${PYENV_ROOT}/versions/venv/bin/activate";
+EOS
+}
+
+@test "activate virtualenv from current version (verbose)" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate --verbose
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+pyenv-virtualenv: activate venv
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv";
+. "${PYENV_ROOT}/versions/venv/bin/activate";
+EOS
+}
+
+@test "activate virtualenv from current version (without pyenv-virtualenv-init)" {
+  export PYENV_VIRTUALENV_INIT=
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+
+  PYENV_SHELL="bash" PYENV_VERSION="venv" run pyenv-sh-activate
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+pyenv shell "venv";
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv";
+. "${PYENV_ROOT}/versions/venv/bin/activate";
+EOS
+}
+
+@test "activate virtualenv from current version (fish)" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+
+  PYENV_SHELL="fish" PYENV_VERSION="venv" run pyenv-sh-activate
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+set -e PYENV_DEACTIVATE;
+setenv PYENV_ACTIVATE "${PYENV_ROOT}/versions/venv";
+. "${PYENV_ROOT}/versions/venv/bin/activate.fish";
+EOS
+}
+
+@test "activate virtualenv from current version (fish) (without pyenv-virtualenv-init)" {
+  export PYENV_VIRTUALENV_INIT=
+
+  stub pyenv-version-name "echo venv"
+  stub pyenv-virtualenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+  stub pyenv-prefix "venv : echo \"${PYENV_ROOT}/versions/venv\""
+
+  PYENV_SHELL="fish" PYENV_VERSION="venv" run pyenv-sh-activate
+
+  unstub pyenv-version-name
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+pyenv shell "venv";
+set -e PYENV_DEACTIVATE;
+setenv PYENV_ACTIVATE "${PYENV_ROOT}/versions/venv";
+. "${PYENV_ROOT}/versions/venv/bin/activate.fish";
+EOS
+}
+
+@test "activate virtualenv from command-line argument" {
+  export PYENV_VIRTUALENV_INIT=1
+
+  stub pyenv-virtualenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""
+  stub pyenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""
+
+  run pyenv-sh-activate "venv27"
+
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+pyenv shell "venv27";
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv27";
+. "${PYENV_ROOT}/versions/venv27/bin/activate";
+EOS
+}
+
+@test "activate virtualenv from command-line argument (without pyenv-virtualenv-init)" {
+  export PYENV_VIRTUALENV_INIT=
+
+  stub pyenv-virtualenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""
+  stub pyenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""
+
+  run pyenv-sh-activate "venv27"
+
+  unstub pyenv-virtualenv-prefix
+  unstub pyenv-prefix
+
+  assert_success
+  assert_output <<EOS
+pyenv shell "venv27";
+unset PYENV_DEACTIVATE;
+export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv27";
+. "${PYENV_ROOT}/versions/venv27/bin/activate";
+EOS
+}
+
+@test "unset invokes deactivate" {
+  run pyenv-sh-activate --unset
+
+  assert_success
+  assert_output <<EOS
+pyenv deactivate
+EOS
+}
+
+@test "should fail if the version is not a virtualenv" {
+  stub pyenv-virtualenv-prefix "3.3.3 : false"
+
+  run pyenv-sh-activate "3.3.3"
+
+  unstub pyenv-virtualenv-prefix
+
+  assert_failure
+  assert_output <<EOS
+pyenv-virtualenv: version \`3.3.3' is not a virtualenv
+false
+EOS
+}
+
+@test "should fail if the version is not a virtualenv (no-error)" {
+  stub pyenv-virtualenv-prefix "3.3.3 : false"
+
+  run pyenv-sh-activate --no-error "3.3.3"
+
+  unstub pyenv-virtualenv-prefix
+
+  assert_failure
+  assert_output <<EOS
+false
+EOS
+}
+
+@test "should fail if there are multiple versions" {
+  run pyenv-sh-activate "venv" "venv27"
+
+  assert_failure
+  assert_output <<EOS
+pyenv-virtualenv: cannot activate multiple versions at once: venv venv27
+false
+EOS
+}
+
+@test "should fail if there are multiple versions (no-error)" {
+  run pyenv-sh-activate --no-error "venv" "venv27"
+
+  assert_failure
+  assert_output <<EOS
+false
+EOS
+}
+
+@test "should fail if activate is invoked as a command" {
+  run pyenv-activate
+
+  assert_failure
+}

test/deactivate.bats

@@ -0,0 +1,223 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+@test "deactivate virtualenv" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  export PYENV_DEACTIVATE="$PYENV_ACTIVATE";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (verbose)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate --verbose
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  echo "pyenv-virtualenv: deactivate venv" 1>&2;
+  export PYENV_DEACTIVATE="$PYENV_ACTIVATE";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (no-error)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate --no-error
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  export PYENV_DEACTIVATE="$PYENV_ACTIVATE";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (without pyenv-virtualenv-init)" {
+  export PYENV_VIRTUALENV_INIT=
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  pyenv shell --unset;
+  export PYENV_DEACTIVATE="$PYENV_ACTIVATE";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (without pyenv-virtualenv-init) (no-error)" {
+  export PYENV_VIRTUALENV_INIT=
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate --no-error
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  pyenv shell --unset;
+  export PYENV_DEACTIVATE="$PYENV_ACTIVATE";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv which has been activated manually" {
+  export PYENV_VIRTUALENV_INIT=1
+  export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="bash" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if declare -f deactivate 1>/dev/null 2>&1; then
+  export PYENV_DEACTIVATE="$VIRTUAL_ENV";
+  unset PYENV_ACTIVATE;
+  deactivate;
+else
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+fi;
+EOS
+}
+
+@test "deactivate virtualenv (fish)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="fish" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if functions -q deactivate;
+  setenv PYENV_DEACTIVATE "$PYENV_ACTIVATE";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+end;
+EOS
+}
+
+@test "deactivate virtualenv (fish) (no-error)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="fish" run pyenv-sh-deactivate --no-error
+
+  assert_success
+  assert_output <<EOS
+if functions -q deactivate;
+  setenv PYENV_DEACTIVATE "$PYENV_ACTIVATE";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+  false;
+end;
+EOS
+}
+
+@test "deactivate virtualenv (fish) (without pyenv-virtualenv-init)" {
+  export PYENV_VIRTUALENV_INIT=
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="fish" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if functions -q deactivate;
+  pyenv shell --unset;
+  setenv PYENV_DEACTIVATE "$PYENV_ACTIVATE";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+end;
+EOS
+}
+
+@test "deactivate virtualenv (fish) (without pyenv-virtualenv-init) (no-error)" {
+  export PYENV_VIRTUALENV_INIT=
+  export PYENV_ACTIVATE="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="fish" run pyenv-sh-deactivate --no-error
+
+  assert_success
+  assert_output <<EOS
+if functions -q deactivate;
+  pyenv shell --unset;
+  setenv PYENV_DEACTIVATE "$PYENV_ACTIVATE";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+  false;
+end;
+EOS
+}
+
+@test "deactivate virtualenv which has been activated manually (fish)" {
+  export PYENV_VIRTUALENV_INIT=1
+  export VIRTUAL_ENV="${PYENV_ROOT}/versions/venv"
+
+  PYENV_SHELL="fish" run pyenv-sh-deactivate
+
+  assert_success
+  assert_output <<EOS
+if functions -q deactivate;
+  setenv PYENV_DEACTIVATE "$VIRTUAL_ENV";
+  set -e PYENV_ACTIVATE;
+  deactivate;
+else;
+  echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2;
+  false;
+end;
+EOS
+}
+
+@test "should fail if deactivate is invoked as a command" {
+  run pyenv-deactivate
+
+  assert_failure
+}

test/hooks.bats

@@ -0,0 +1,35 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+  export HOOK_PATH="${TMP}/i has hooks"
+  mkdir -p "$HOOK_PATH"
+}
+
+@test "pyenv-virtualenv hooks" {
+  cat > "${HOOK_PATH}/virtualenv.bash" <<OUT
+before_virtualenv 'echo before: \$VIRTUALENV_PATH'
+after_virtualenv 'echo after: \$STATUS'
+OUT
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.2.1'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.2.1'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.2.1'"
+  stub pyenv-hooks "virtualenv : echo '$HOOK_PATH'/virtualenv.bash"
+  stub pyenv-exec "echo PYENV_VERSION=3.2.1 \"\$@\""
+  stub pyenv-rehash "echo rehashed"
+
+  create_executable "3.2.1" "virtualenv"
+  remove_executable "3.2.1" "pyvenv"
+
+  run pyenv-virtualenv "3.2.1" venv
+
+  assert_success
+  assert_output <<-OUT
+before: ${PYENV_ROOT}/versions/venv
+PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/venv
+after: 0
+rehashed
+OUT
+}

test/init.bats

@@ -0,0 +1,120 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+@test "detect parent shell" {
+  root="$(cd $BATS_TEST_DIRNAME/.. && pwd)"
+  SHELL=/bin/false run pyenv-virtualenv-init -
+  assert_success
+  assert_output_contains '  PROMPT_COMMAND="_pyenv_virtualenv_hook;$PROMPT_COMMAND";'
+}
+
+@test "sh-compatible instructions" {
+  run pyenv-virtualenv-init bash
+  assert [ "$status" -eq 1 ]
+  assert_output_contains 'eval "$(pyenv virtualenv-init -)"'
+
+  run pyenv-virtualenv-init zsh
+  assert [ "$status" -eq 1 ]
+  assert_output_contains 'eval "$(pyenv virtualenv-init -)"'
+}
+
+@test "fish instructions" {
+  run pyenv-virtualenv-init fish
+  assert [ "$status" -eq 1 ]
+  assert_output_contains 'status --is-interactive; and . (pyenv virtualenv-init -|psub)'
+}
+
+@test "outputs bash-specific syntax" {
+  run pyenv-virtualenv-init - bash
+  assert_success
+  assert_output <<EOS
+export PYENV_VIRTUALENV_INIT=1;
+_pyenv_virtualenv_hook() {
+  if [ -n "\$PYENV_ACTIVATE" ]; then
+    if [ "\$(pyenv version-name)" = "system" ]; then
+      pyenv deactivate --no-error --verbose
+      unset PYENV_DEACTIVATE
+      return 0
+    fi
+    if [ "\$PYENV_ACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      if pyenv deactivate --no-error --verbose; then
+        unset PYENV_DEACTIVATE
+        pyenv activate --no-error --verbose || unset PYENV_DEACTIVATE
+      else
+        pyenv activate --no-error --verbose
+      fi
+    fi
+  else
+    if [ -z "\$VIRTUAL_ENV" ] && [ "\$PYENV_DEACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      pyenv activate --no-error --verbose
+    fi
+  fi
+};
+if ! [[ "\$PROMPT_COMMAND" =~ _pyenv_virtualenv_hook ]]; then
+  PROMPT_COMMAND="_pyenv_virtualenv_hook;\$PROMPT_COMMAND";
+fi
+EOS
+}
+
+@test "outputs fish-specific syntax" {
+  run pyenv-virtualenv-init - fish
+  assert_success
+  assert_output <<EOS
+setenv PYENV_VIRTUALENV_INIT 1;
+function _pyenv_virtualenv_hook --on-event fish_prompt;
+  if [ -n "\$PYENV_ACTIVATE" ]
+    if [ (pyenv version-name) = "system" ]
+      pyenv deactivate --no-error --verbose
+      set -e PYENV_DEACTIVATE
+      return 0
+    end
+    if [ "\$PYENV_ACTIVATE" != (pyenv prefix 2>/dev/null) ]
+      if pyenv deactivate --no-error --verbose
+        set -e PYENV_DEACTIVATE
+        pyenv activate --no-error --verbose; or set -e PYENV_DEACTIVATE
+      else
+        pyenv activate --no-error --verbose
+      end
+    end
+  else
+    if [ -z "\$VIRTUAL_ENV" ]; and [ "\$PYENV_DEACTIVATE" != (pyenv prefix 2>/dev/null) ]
+      pyenv activate --no-error --verbose
+    end
+  end
+end
+EOS
+}
+
+@test "outputs zsh-specific syntax" {
+  run pyenv-virtualenv-init - zsh
+  assert_success
+  assert_output <<EOS
+export PYENV_VIRTUALENV_INIT=1;
+_pyenv_virtualenv_hook() {
+  if [ -n "\$PYENV_ACTIVATE" ]; then
+    if [ "\$(pyenv version-name)" = "system" ]; then
+      pyenv deactivate --no-error --verbose
+      unset PYENV_DEACTIVATE
+      return 0
+    fi
+    if [ "\$PYENV_ACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      if pyenv deactivate --no-error --verbose; then
+        unset PYENV_DEACTIVATE
+        pyenv activate --no-error --verbose || unset PYENV_DEACTIVATE
+      else
+        pyenv activate --no-error --verbose
+      fi
+    fi
+  else
+    if [ -z "\$VIRTUAL_ENV" ] && [ "\$PYENV_DEACTIVATE" != "\$(pyenv prefix 2>/dev/null)" ]; then
+      pyenv activate --no-error --verbose
+    fi
+  fi
+};
+typeset -a precmd_functions
+if [[ -z \$precmd_functions[(r)_pyenv_virtualenv_hook] ]]; then
+  precmd_functions+=_pyenv_virtualenv_hook;
+fi
+EOS
+}

test/installer.bats

@@ -0,0 +1,48 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+@test "installs pyenv-virtualenv into PREFIX" {
+  cd "$TMP"
+  PREFIX="${PWD}/usr" run "${BATS_TEST_DIRNAME}/../install.sh"
+  assert_success ""
+
+  cd usr
+
+  assert [ -x bin/pyenv-activate ]
+  assert [ -x bin/pyenv-deactivate ]
+  assert [ -x bin/pyenv-sh-activate ]
+  assert [ -x bin/pyenv-sh-deactivate ]
+  assert [ -x bin/pyenv-virtualenv ]
+  assert [ -x bin/pyenv-virtualenv-init ]
+  assert [ -x bin/pyenv-virtualenv-prefix ]
+  assert [ -x bin/pyenv-virtualenvs ]
+}
+
+@test "overwrites old installation" {
+  cd "$TMP"
+  mkdir -p bin
+  touch bin/pyenv-virtualenv
+
+  PREFIX="$PWD" run "${BATS_TEST_DIRNAME}/../install.sh"
+  assert_success ""
+
+  assert [ -x bin/pyenv-virtualenv ]
+  run grep "virtualenv" bin/pyenv-virtualenv
+  assert_success
+}
+
+@test "unrelated files are untouched" {
+  cd "$TMP"
+  mkdir -p bin share/bananas
+  chmod g-w bin
+  touch bin/bananas
+
+  PREFIX="$PWD" run "${BATS_TEST_DIRNAME}/../install.sh"
+  assert_success ""
+
+  assert [ -e bin/bananas ]
+
+  run ls -ld bin
+  assert_equal "r-x" "${output:4:3}"
+}

test/pip.bats

@@ -0,0 +1,78 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+stub_pyenv() {
+  stub pyenv-version-name "echo \${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-hooks "virtualenv : echo"
+  stub pyenv-rehash " : echo rehashed"
+}
+
+unstub_pyenv() {
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-hooks
+  unstub pyenv-rehash
+}
+
+@test "install pip with ensurepip" {
+  export PYENV_VERSION="3.4.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pyvenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/venv/bin"
+  stub pyenv-exec "python -m ensurepip : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/venv/bin/pip"
+
+  remove_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.4.1 pyvenv ${PYENV_ROOT}/versions/venv
+PYENV_VERSION=venv python -m ensurepip
+rehashed
+OUT
+  assert [ -e "${PYENV_ROOT}/versions/venv/bin/pip" ]
+
+  unstub_pyenv
+  unstub pyenv-exec
+}
+
+@test "install pip without using ensurepip" {
+  export PYENV_VERSION="3.3.5"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pyvenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";mkdir -p \${PYENV_ROOT}/versions/venv/bin"
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/venv/bin/easy_install"
+  stub pyenv-exec "python */get-pip.py : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\";touch \${PYENV_ROOT}/versions/venv/bin/pip"
+  stub curl true
+  stub curl true
+
+  remove_executable "3.3.5" "virtualenv"
+  create_executable "3.3.5" "pyvenv"
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.3.5 pyvenv ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+PYENV_VERSION=venv python ${TMP}/pyenv/cache/ez_setup.py
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+PYENV_VERSION=venv python ${TMP}/pyenv/cache/get-pip.py
+rehashed
+OUT
+  assert [ -e "${PYENV_ROOT}/versions/venv/bin/pip" ]
+
+  unstub_pyenv
+  unstub pyenv-exec
+}

test/pyvenv.bats

@@ -0,0 +1,181 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+stub_pyenv() {
+  stub pyenv-version-name "echo \${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-hooks "virtualenv : echo"
+  stub pyenv-rehash " : echo rehashed"
+}
+
+unstub_pyenv() {
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-hooks
+  unstub pyenv-rehash
+}
+
+@test "use pyvenv if virtualenv is not available" {
+  export PYENV_VERSION="3.4.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pyvenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : true"
+
+  remove_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.4.1 pyvenv ${PYENV_ROOT}/versions/venv
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+}
+
+@test "not use pyvenv if virtualenv is available" {
+  export PYENV_VERSION="3.4.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "virtualenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : true"
+
+  create_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.4.1 virtualenv ${PYENV_ROOT}/versions/venv
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+}
+
+@test "install virtualenv if pyvenv is not avaialble" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pip install virtualenv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "virtualenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  remove_executable "3.2.1" "virtualenv"
+  remove_executable "3.2.1" "pyvenv"
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.2.1 pip install virtualenv
+PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "install virtualenv if -p has given" {
+  export PYENV_VERSION="3.4.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pip install virtualenv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "virtualenv --python=python3 ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : true"
+
+  remove_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv -p python3 venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.4.1 pip install virtualenv
+PYENV_VERSION=3.4.1 virtualenv --python=python3 ${PYENV_ROOT}/versions/venv
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+}
+
+@test "install virtualenv if --python has given" {
+  export PYENV_VERSION="3.4.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pip install virtualenv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "virtualenv --python=python3 ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : true"
+
+  remove_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv --python=python3 venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.4.1 pip install virtualenv
+PYENV_VERSION=3.4.1 virtualenv --python=python3 ${PYENV_ROOT}/versions/venv
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+}
+
+@test "install virtualenv with unsetting troublesome pip options" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix " : echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-exec "pip install virtualenv : echo PIP_REQUIRE_VENV=\${PIP_REQUIRE_VENV} PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "virtualenv ${PYENV_ROOT}/versions/venv : echo PIP_REQUIRE_VENV=\${PIP_REQUIRE_VENV} PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  remove_executable "3.2.1" "virtualenv"
+  remove_executable "3.2.1" "pyvenv"
+
+  PIP_REQUIRE_VENV="true" run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PIP_REQUIRE_VENV= PYENV_VERSION=3.2.1 pip install virtualenv
+PIP_REQUIRE_VENV= PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+  unstub curl
+}

test/stubs/stub

@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+set -e
+
+status=0
+program="${0##*/}"
+PROGRAM="$(echo "$program" | tr a-z- A-Z_)"
+[ -n "$TMPDIR" ] || TMPDIR="/tmp"
+
+_STUB_PLAN="${PROGRAM}_STUB_PLAN"
+_STUB_RUN="${PROGRAM}_STUB_RUN"
+_STUB_INDEX="${PROGRAM}_STUB_INDEX"
+_STUB_RESULT="${PROGRAM}_STUB_RESULT"
+_STUB_END="${PROGRAM}_STUB_END"
+_STUB_DEBUG="${PROGRAM}_STUB_DEBUG"
+
+if [ -n "${!_STUB_DEBUG}" ]; then
+  echo "$program" "$@" >&${!_STUB_DEBUG}
+fi
+
+[ -e "${!_STUB_PLAN}" ] || exit 1
+[ -n "${!_STUB_RUN}" ] || eval "${_STUB_RUN}"="${TMPDIR}/${program}-stub-run"
+
+
+# Initialize or load the stub run information.
+eval "${_STUB_INDEX}"=1
+eval "${_STUB_RESULT}"=0
+[ ! -e "${!_STUB_RUN}" ] || source "${!_STUB_RUN}"
+
+
+# Loop over each line in the plan.
+index=0
+while IFS= read -r line; do
+  index=$(($index + 1))
+
+  if [ -z "${!_STUB_END}" ] && [ $index -eq "${!_STUB_INDEX}" ]; then
+    # We found the plan line we're interested in.
+    # Start off by assuming success.
+    result=0
+
+    # Split the line into an array of arguments to
+    # match and a command to run to produce output.
+    command=" $line"
+    if [ "$command" != "${command/ : }" ]; then
+      patterns="${command%% : *}"
+      command="${command#* : }"
+    fi
+
+    # Naively split patterns by whitespace for now.
+    # In the future, use a sed script to split while
+    # respecting quoting.
+    set -f
+    patterns=($patterns)
+    set +f
+    arguments=("$@")
+
+    # Match the expected argument patterns to actual
+    # arguments.
+    for (( i=0; i<${#patterns[@]}; i++ )); do
+      pattern="${patterns[$i]}"
+      argument="${arguments[$i]}"
+
+      case "$argument" in
+        $pattern ) ;;
+        * ) result=1 ;;
+      esac
+    done
+
+    # If the arguments matched, evaluate the command
+    # in a subshell. Otherwise, log the failure.
+    if [ $result -eq 0 ] ; then
+      set +e
+      ( eval "$command" )
+      status="$?"
+      set -e
+    else
+      eval "${_STUB_RESULT}"=1
+    fi
+  fi
+done < "${!_STUB_PLAN}"
+
+
+if [ -n "${!_STUB_END}" ]; then
+  # Clean up the run file.
+  rm -f "${!_STUB_RUN}"
+
+  # If the number of lines in the plan is larger than
+  # the requested index, we failed.
+  if [ $index -ge "${!_STUB_INDEX}" ]; then
+    eval "${_STUB_RESULT}"=1
+  fi
+
+  # Return the result.
+  exit "${!_STUB_RESULT}"
+
+else
+  # If the requested index is larger than the number
+  # of lines in the plan file, we failed.
+  if [ "${!_STUB_INDEX}" -gt $index ]; then
+    eval "${_STUB_RESULT}"=1
+  fi
+
+  # Write out the run information.
+  { echo "${_STUB_INDEX}=$((${!_STUB_INDEX} + 1))"
+    echo "${_STUB_RESULT}=${!_STUB_RESULT}"
+  } > "${!_STUB_RUN}"
+
+  exit "$status"
+
+fi

test/test_helper.bash

@@ -0,0 +1,108 @@
+export TMP="$BATS_TEST_DIRNAME/tmp"
+
+PATH=/usr/bin:/usr/sbin:/bin/:/sbin
+PATH="$BATS_TEST_DIRNAME/../bin:$PATH"
+PATH="$TMP/bin:$PATH"
+export PATH
+
+teardown() {
+  rm -fr "$TMP"/*
+}
+
+stub() {
+  local program="$1"
+  local prefix="$(echo "$program" | tr a-z- A-Z_)"
+  shift
+
+  export "${prefix}_STUB_PLAN"="${TMP}/${program}-stub-plan"
+  export "${prefix}_STUB_RUN"="${TMP}/${program}-stub-run"
+  export "${prefix}_STUB_END"=
+
+  mkdir -p "${TMP}/bin"
+  ln -sf "${BATS_TEST_DIRNAME}/stubs/stub" "${TMP}/bin/${program}"
+
+  touch "${TMP}/${program}-stub-plan"
+  for arg in "$@"; do printf "%s\n" "$arg" >> "${TMP}/${program}-stub-plan"; done
+}
+
+unstub() {
+  local program="$1"
+  local prefix="$(echo "$program" | tr a-z- A-Z_)"
+  local path="${TMP}/bin/${program}"
+
+  export "${prefix}_STUB_END"=1
+
+  local STATUS=0
+  "$path" || STATUS="$?"
+
+  rm -f "$path"
+  rm -f "${TMP}/${program}-stub-plan" "${TMP}/${program}-stub-run"
+  return "$STATUS"
+}
+
+assert() {
+  if ! "$@"; then
+    flunk "failed: $@"
+  fi
+}
+
+flunk() {
+  { if [ "$#" -eq 0 ]; then cat -
+    else echo "$@"
+    fi
+  } | sed "s:${TMP}:\${TMP}:g" >&2
+  return 1
+}
+
+assert_success() {
+  if [ "$status" -ne 0 ]; then
+    { echo "command failed with exit status $status"
+      echo "output: $output"
+    } | flunk
+  elif [ "$#" -gt 0 ]; then
+    assert_output "$1"
+  fi
+}
+
+assert_failure() {
+  if [ "$status" -eq 0 ]; then
+    flunk "expected failed exit status"
+  elif [ "$#" -gt 0 ]; then
+    assert_output "$1"
+  fi
+}
+
+assert_equal() {
+  if [ "$1" != "$2" ]; then
+    { echo "expected: $1"
+      echo "actual:   $2"
+    } | flunk
+  fi
+}
+
+assert_output() {
+  local expected
+  if [ $# -eq 0 ]; then expected="$(cat -)"
+  else expected="$1"
+  fi
+  assert_equal "$expected" "$output"
+}
+
+assert_output_contains() {
+  local expected="$1"
+  echo "$output" | grep -F "$expected" >/dev/null || {
+    { echo "expected output to contain $expected"
+      echo "actual: $output"
+    } | flunk
+  }
+}
+
+create_executable() {
+  mkdir -p "${PYENV_ROOT}/versions/$1/bin"
+  touch "${PYENV_ROOT}/versions/$1/bin/$2"
+  chmod +x "${PYENV_ROOT}/versions/$1/bin/$2"
+}
+
+remove_executable() {
+  rm -f "${PYENV_ROOT}/versions/$1/bin/$2"
+}

test/tmp/.gitignore

@@ -0,0 +1 @@
+*

test/version.bats

@@ -0,0 +1,43 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+  export PYENV_VIRTUALENV_VERSION="20141106"
+}
+
+@test "display virtualenv version" {
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/2.7.7'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/2.7.7'"
+  stub pyenv-exec "virtualenv --version : echo \"1.11\""
+
+  create_executable "2.7.7" "virtualenv"
+  remove_executable "2.7.7" "pyvenv"
+
+  run pyenv-virtualenv --version
+
+  assert_success
+  assert_output "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (virtualenv 1.11)"
+
+  unstub pyenv-prefix
+  unstub pyenv-exec
+}
+
+@test "display pyvenv version" {
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.4.1'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/3.4.1'"
+  stub pyenv-which "pyvenv : echo \"${PYENV_ROOT}/versions/3.4.1/bin/pyvenv\""
+  stub pyenv-root "echo \"${PYENV_ROOT}\""
+
+  remove_executable "3.4.1" "virtualenv"
+  create_executable "3.4.1" "pyvenv"
+
+  run pyenv-virtualenv --version
+
+  assert_success
+  assert_output "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (pyvenv 3.4.1)"
+
+  unstub pyenv-prefix
+  unstub pyenv-root
+}

test/virtualenv-prefix.bats

@@ -0,0 +1,158 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+create_virtualenv() {
+  mkdir -p "${PYENV_ROOT}/versions/$1/bin"
+  touch "${PYENV_ROOT}/versions/$1/bin/activate"
+}
+
+remove_virtualenv() {
+  rm -fr "${PYENV_ROOT}/versions/$1"
+}
+
+@test "display prefix with using sys.real_prefix" {
+  stub pyenv-version-name "echo venv27"
+  stub pyenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\""
+  stub pyenv-exec "echo \"${PYENV_ROOT}/versions/2.7.6\""
+  create_virtualenv "venv27"
+
+  PYENV_VERSION="venv27" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-exec
+  remove_virtualenv "venv27"
+
+  assert_success
+  assert_output <<OUT
+${PYENV_ROOT}/versions/2.7.6
+OUT
+}
+
+@test "display prefixes with using sys.real_prefix" {
+  stub pyenv-version-name "echo venv27:venv32"
+  stub pyenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/venv27\"" \
+                    "venv32 : echo \"${PYENV_ROOT}/versions/venv32\""
+  stub pyenv-exec "echo \"${PYENV_ROOT}/versions/2.7.6\"" \
+                  "echo \"${PYENV_ROOT}/versions/3.2.1\""
+  create_virtualenv "venv27"
+  create_virtualenv "venv32"
+
+  PYENV_VERSION="venv27:venv32" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-exec
+  remove_virtualenv "venv27"
+  remove_virtualenv "venv32"
+
+  assert_success
+  assert_output <<OUT
+${PYENV_ROOT}/versions/2.7.6:${PYENV_ROOT}/versions/3.2.1
+OUT
+}
+
+@test "display prefix with using sys.base_prefix" {
+  stub pyenv-version-name "echo venv33"
+  stub pyenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/venv33\""
+  stub pyenv-exec "false" \
+                  "echo \"${PYENV_ROOT}/versions/3.3.3\""
+  create_virtualenv "venv33"
+
+  PYENV_VERSION="venv33" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-exec
+  remove_virtualenv "venv33"
+
+  assert_success
+  assert_output <<OUT
+${PYENV_ROOT}/versions/3.3.3
+OUT
+}
+
+@test "display prefixes with using sys.base_prefix" {
+  stub pyenv-version-name "echo venv33:venv34"
+  stub pyenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/venv33\"" \
+                    "venv34 : echo \"${PYENV_ROOT}/versions/venv34\""
+  stub pyenv-exec "false" \
+                  "echo \"${PYENV_ROOT}/versions/3.3.3\"" \
+                  "false" \
+                  "echo \"${PYENV_ROOT}/versions/3.4.0\""
+  create_virtualenv "venv33"
+  create_virtualenv "venv34"
+
+  PYENV_VERSION="venv33:venv34" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-exec
+  remove_virtualenv "venv33"
+  remove_virtualenv "venv34"
+
+  assert_success
+  assert_output <<OUT
+${PYENV_ROOT}/versions/3.3.3:${PYENV_ROOT}/versions/3.4.0
+OUT
+}
+
+@test "should fail if the version is the system" {
+  stub pyenv-version-name "echo system"
+
+  PYENV_VERSION="system" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: version \`system' is not a virtualenv
+OUT
+}
+
+@test "should fail if the version is not a virtualenv" {
+  stub pyenv-version-name "echo 3.4.0"
+  stub pyenv-prefix "3.4.0 : echo \"${PYENV_ROOT}/versions/3.4.0\""
+  mkdir -p "${PYENV_ROOT}/versions/3.4.0"
+
+  PYENV_VERSION="3.4.0" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  rmdir "${PYENV_ROOT}/versions/3.4.0"
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: version \`3.4.0' is not a virtualenv
+OUT
+}
+
+@test "should fail if one of the versions is not a virtualenv" {
+  stub pyenv-version-name "echo venv33:3.4.0"
+  stub pyenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/venv33\"" \
+                    "3.4.0 : echo \"${PYENV_ROOT}/versions/3.4.0\""
+  stub pyenv-exec "false" \
+                  "echo \"${PYENV_ROOT}/versions/3.3.3\""
+  create_virtualenv "venv33"
+  mkdir -p "${PYENV_ROOT}/versions/3.4.0"
+
+  PYENV_VERSION="venv33:3.4.0" run pyenv-virtualenv-prefix
+
+  unstub pyenv-version-name
+  unstub pyenv-prefix
+  unstub pyenv-exec
+  remove_virtualenv "venv33"
+  rmdir "${PYENV_ROOT}/versions/3.4.0"
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: version \`3.4.0' is not a virtualenv
+OUT
+}
+
+

test/virtualenv.bats

@@ -0,0 +1,148 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+}
+
+stub_pyenv() {
+  create_executable "${PYENV_VERSION}" "virtualenv"
+  remove_executable "${PYENV_VERSION}" "pyvenv"
+
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-prefix "echo '${PYENV_ROOT}/versions/${PYENV_VERSION}'"
+  stub pyenv-hooks "virtualenv : echo"
+  stub pyenv-rehash " : echo rehashed"
+}
+
+unstub_pyenv() {
+  unstub pyenv-prefix
+  unstub pyenv-hooks
+  unstub pyenv-rehash
+}
+
+@test "create virtualenv from given version" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-exec "virtualenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  run pyenv-virtualenv "3.2.1" "venv"
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "create virtualenv from current version" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-version-name "echo \${PYENV_VERSION}"
+  stub pyenv-exec "virtualenv ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  run pyenv-virtualenv venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.2.1 virtualenv ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-version-name
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "create virtualenv with short options" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-version-name "echo \${PYENV_VERSION}"
+  stub pyenv-exec "virtualenv --verbose --python=python ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  run pyenv-virtualenv -v -p python venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.2.1 virtualenv --verbose --python=python ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-version-name
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "create virtualenv with long options" {
+  export PYENV_VERSION="3.2.1"
+  stub_pyenv "${PYENV_VERSION}"
+  stub pyenv-version-name "echo \${PYENV_VERSION}"
+  stub pyenv-exec "virtualenv --verbose --python=python ${PYENV_ROOT}/versions/venv : echo PYENV_VERSION=\${PYENV_VERSION} \"\$@\""
+  stub pyenv-exec "python -m ensurepip : false"
+  stub pyenv-exec "python */ez_setup.py : true"
+  stub pyenv-exec "python */get-pip.py : true"
+  stub curl true
+  stub curl true
+
+  run pyenv-virtualenv --verbose --python=python venv
+
+  assert_success
+  assert_output <<OUT
+PYENV_VERSION=3.2.1 virtualenv --verbose --python=python ${PYENV_ROOT}/versions/venv
+Installing setuptools from https://bootstrap.pypa.io/ez_setup.py...
+Installing pip from https://bootstrap.pypa.io/get-pip.py...
+rehashed
+OUT
+
+  unstub_pyenv
+  unstub pyenv-version-name
+  unstub pyenv-exec
+  unstub curl
+}
+
+@test "no whitespace allowed in virtualenv name" {
+  run pyenv-virtualenv "3.2.1" "foo bar"
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: no whitespace allowed in virtualenv name.
+OUT
+}
+
+@test "no tab allowed in virtualenv name" {
+  run pyenv-virtualenv "3.2.1" "foo	bar baz"
+
+  assert_failure
+  assert_output <<OUT
+pyenv-virtualenv: no whitespace allowed in virtualenv name.
+OUT
+}

test/virtualenvs.bats

@@ -0,0 +1,68 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  export PYENV_ROOT="${TMP}/pyenv"
+  mkdir -p "${PYENV_ROOT}/versions/2.7.6"
+  mkdir -p "${PYENV_ROOT}/versions/3.3.3"
+  mkdir -p "${PYENV_ROOT}/versions/venv27"
+  mkdir -p "${PYENV_ROOT}/versions/venv33"
+}
+
+@test "list virtual environments only" {
+  stub pyenv-version-name ": echo system"
+  stub pyenv-versions "--bare : echo \"system\";echo \"2.7.6\";echo \"3.3.3\";echo \"venv27\";echo \"venv33\""
+  stub pyenv-virtualenv-prefix "2.7.6 : false"
+  stub pyenv-virtualenv-prefix "3.3.3 : false"
+  stub pyenv-virtualenv-prefix "venv27 : echo \"${PYENV_ROOT}/versions/2.7.6\""
+  stub pyenv-virtualenv-prefix "venv33 : echo \"${PYENV_ROOT}/versions/3.3.3\""
+
+  run pyenv-virtualenvs
+
+  unstub pyenv-version-name
+  unstub pyenv-versions
+  unstub pyenv-virtualenv-prefix
+
+  assert_success
+  assert_output <<OUT
+  venv27 (created from ${PYENV_ROOT}/versions/2.7.6)
+  venv33 (created from ${PYENV_ROOT}/versions/3.3.3)
+OUT
+}
+
+@test "list virtual environments with hit prefix" {
+  stub pyenv-version-name ": echo venv33"
+  stub pyenv-versions "--bare : echo \"system\";echo \"venv27\";echo \"venv33\""
+  stub pyenv-virtualenv-prefix "venv27 : echo \"/usr\""
+  stub pyenv-virtualenv-prefix "venv33 : echo \"/usr\""
+
+  run pyenv-virtualenvs
+
+  unstub pyenv-version-name
+  unstub pyenv-versions
+  unstub pyenv-virtualenv-prefix
+
+  assert_success
+  assert_output <<OUT
+  venv27 (created from /usr)
+* venv33 (created from /usr)
+OUT
+}
+
+@test "list virtual environments with --bare" {
+  stub pyenv-versions "--bare : echo \"system\";echo \"venv27\";echo \"venv33\""
+  stub pyenv-virtualenv-prefix "venv27 : echo \"/usr\""
+  stub pyenv-virtualenv-prefix "venv33 : echo \"/usr\""
+
+  run pyenv-virtualenvs --bare
+
+  unstub pyenv-versions
+  unstub pyenv-virtualenv-prefix
+
+  assert_success
+  assert_output <<OUT
+venv27
+venv33
+OUT
+}